Carrier AQUASNAP MPW015-045 Specifications

AquaSnap®
30MPA,MPW015-045
Liquid Chillers with Scroll Compressors
and ComfortLink Controls
Controls, Start-Up, Operation,
Service, and Troubleshooting
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Conventions Used in this Manual . . . . . . . . . . . . . . . . 3
Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Energy Management Module (EMM) . . . . . . . . . . . . . . 7
Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . . 7
Enable/Off/Remote Contact Switch . . . . . . . . . . . . . . . 7
Emergency On/Off Switch . . . . . . . . . . . . . . . . . . . . . . . . 7
Board Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Control Module Communication. . . . . . . . . . . . . . . . . . 7
Carrier Comfort Network® Interface . . . . . . . . . . . . . . 7
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
• COOLER LEAVING FLUID SENSOR
• COOLER ENTERING FLUID SENSOR
• CONDENSER LEAVING FLUID SENSOR
• CONDENSER ENTERING FLUID SENSOR
• COMPRESSOR RETURN GAS
TEMPERATURE SENSOR
• OUTDOOR-AIR TEMPERATURE SENSOR
• DUAL LEAVING WATER TEMPERATURE SENSOR
• DISCHARGE TEMPERATURE SENSOR
• REMOTE SPACE TEMPERATURE SENSOR
Energy Management Module . . . . . . . . . . . . . . . . . . . . 14
Loss-of-Cooler Flow Protection . . . . . . . . . . . . . . . . . 14
Condenser Flow Protection . . . . . . . . . . . . . . . . . . . . . 14
Thermostatic Expansion Valves (TXV). . . . . . . . . . . 14
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
• MINUTES LEFT FOR START
• MINUTES OFF TIME
• CAPACITY CONTROL OVERRIDES
Operation of Machine Based on Control Method
and Cooling Set Point Selection Settings . . . . . 17
Cooling Set Point Select . . . . . . . . . . . . . . . . . . . . . . . . 17
Cooler Pump Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cooler Pump Sequence of Operation. . . . . . . . . . . . 18
Condenser Pump/Condenser Fan Output
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Configuring and Operating Dual Chiller Control . 18
Temperature Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
• DEMAND LIMIT (2-Stage Switch Controlled)
• EXTERNALLY POWERED DEMAND LIMIT
(4 to 20 mA Controlled)
• DEMAND LIMIT (CCN Loadshed Controlled)
Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . . . 24
Digital Scroll Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26,27
System Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Page
START-UP AND OPERATION . . . . . . . . . . . . . . . . . 27-29
Actual Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Check Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . 27
Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
• TEMPERATURES
• VOLTAGE — ALL UNITS
OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . 29
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-34
Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . 29
• CONTROL COMPONENTS
Compressor Replacement. . . . . . . . . . . . . . . . . . . . . . . 29
30MPW Condenser and 30MP Cooler. . . . . . . . . . . . 30
• BRAZED-PLATE COOLER AND CONDENSER
HEAT EXCHANGER REPLACEMENT
• BRAZED-PLATE COOLER AND CONDENSER
HEAT EXCHANGER CLEANING
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Check Refrigerant Feed Components . . . . . . . . . . . 30
• FILTER DRIER
• MOISTURE-LIQUID INDICATOR
• THERMOSTATIC EXPANSION VALVE (TXV)
• MINIMUM LOAD VALVE
• PRESSURE RELIEF DEVICES
Check Unit Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Pressure Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Chilled Water Flow Switch. . . . . . . . . . . . . . . . . . . . . . . 33
Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Replacing Defective Modules . . . . . . . . . . . . . . . . . . . 38
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Recommended Maintenance Schedule . . . . . . . . . . 38
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 39-50
Complete Unit Stoppage and Restart. . . . . . . . . . . . 39
• GENERAL POWER FAILURE
• UNIT ENABLE-OFF-REMOTE CONTACT SWITCH
IS OFF
• CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN
• OPEN 24-V CONTROL CIRCUIT BREAKERS
• COOLING LOAD SATISFIED
• THERMISTOR FAILURE
• LOW SATURATED SUCTION
• COMPRESSOR SAFETIES
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
APPENDIX A — LOCAL DISPLAY TABLES . . . 51-59
APPENDIX B — CCN TABLES . . . . . . . . . . . . . . . . 60-64
APPENDIX C — BACNET COMMUNICATION
OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65-71
APPENDIX D — MAINTENANCE SUMMARY AND
LOG SHEETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72,73
START-UP CHECKLIST FOR 30MP LIQUID
CHILLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1 to CL-7
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300078-01
Printed in U.S.A.
Form 30MP-2T
Pg 1
12-13
Replaces: 30MP-1T
SAFETY CONSIDERATIONS
CAUTION
Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (elevated structures, mechanical rooms,
etc.). Only trained, qualified installers and service mechanics
should install, start up, and service this equipment.
When working on this equipment, observe precautions in
the literature, and on tags, stickers, and labels attached to the
equipment, and any other safety precautions that apply. Follow
all safety codes. Wear safety glasses and work gloves. Use
care in handling, rigging, and setting this equipment, and in
handling all electrical components.
DO NOT re-use compressor oil or any oil that has been
exposed to the atmosphere. Dispose of oil per local codes
and regulations. DO NOT leave refrigerant system open to
air any longer than the actual time required to service the
equipment. Seal circuits being serviced and charge with
dry nitrogen to prevent oil contamination when timely
repairs cannot be completed. Failure to follow these procedures may result in damage to equipment.
CAUTION
WARNING
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out
components, or to bypass or otherwise depart from recommended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work
is completed.
WARNING
CAUTION
DO NOT VENT refrigerant relief valves within a building.
Outlet from relief valves must be vented outdoors in
accordance with the latest edition of ANSI/ASHRAE
(American National Standards Institute/American Society
of Heating, Refrigerating and Air-Conditioning Engineers)
15 (Safety Code for Mechanical Refrigeration). The
accumulation of refrigerant in an enclosed space can
displace oxygen and cause asphyxiation. Provide adequate
ventilation in enclosed or low overhead areas. Inhalation of
high concentrations of vapor is harmful and may cause
heart irregularities, unconsciousness or death. Misuse can
be fatal. Vapor is heavier than air and reduces the amount
of oxygen available for breathing. Product causes eye and
skin irritation. Decomposition products are hazardous.
To prevent potential damage to heat exchanger, always run
fluid through heat exchanger when adding or removing
refrigerant charge. Use appropriate brine solutions in cooler
fluid loop to prevent the freezing of brazed plate heat
exchanger when the equipment is exposed to temperatures
below 32 F (0° C). Proof of flow switch is factory installed
on all models. Do NOT remove power from this chiller during winter shutdown periods without taking precaution to
remove all water from heat exchanger and optional
hydronic system. Failure to properly protect the system
from freezing may constitute abuse and may void warranty.
CAUTION
WARNING
Compressors require specific rotation. Monitor control
alarms during first compressor start-up for reverse rotation
protection. Damage to unit may result.
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen
and the work area should be well ventilated. Refrigerant in contact with an open flame produces toxic
gases.
d. Cut component connection tubing with tubing cutter
and remove component from unit. Use a pan to catch
any oil that may come out of the lines and as a gage
for how much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal
injury or death.
CAUTION
Refrigerant charge must be removed slowly to prevent loss
of compressor oil that could result in compressor failure.
CAUTION
Puron® refrigerant (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment. If service equipment is not rated for Puron
refrigerant, equipment damage or personal injury may
result.
2
structure. Press the ESCAPE key until the highest operating
level is displayed to move through the top 11 mode levels indicated by LEDs (light-emitting diodes) on the left side of the display. See Fig. 1 and Table 2.
GENERAL
This publication contains Start-Up, Service, Controls, Operation, and Troubleshooting information for the 30MPW watercooled chillers and the 30MPA air-cooled chillers. See Table 1.
These liquid chillers are equipped with ComfortLink controls
and conventional thermostatic expansion valves (TXVs). The
30MPA units and the 30MPW units with optional medium
temperature brine are also equipped with liquid line solenoid
valves (LLSVs).
Once within a mode or sub-mode, pressing the ENTER
and ESCAPE keys simultaneously will put the scrolling
marquee display into expanded text mode where the full meaning of all sub-modes, items and their values can be displayed
for the current selection. Press the ENTER and ESCAPE
keys to return the scrolling marquee display to its default menu
of rotating display items (those items in Run StatusVIEW).
In addition, the password will be disabled, requiring that it be
entered again before changes can be made to password protected items. Press the ESCAPE key to exit out of the expanded
text mode.
CAUTION
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out or
bypass components or otherwise depart from recommended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the board or
electrical component.
NOTE: When the Language Selection (Configuration
DISPLANG), variable is changed, all appropriate display
expansions will immediately change to the new language. No
power-off or control reset is required when reconfiguring
languages.
When a specific item is located, the item name alternates
with the value. Press the ENTER key at a changeable item
and the value will be displayed. Press ENTER again and the
value will begin to flash indicating that the value can be
changed. Use the up and down arrow keys to change the value,
and confirm the value by pressing the ENTER key.
Table 1 — Unit Sizes
UNIT MODEL
30MPA,MPW015
30MPA,MPW020
30MPA,MPW030
30MPA,MPW040
30MPA,MPW045
NOMINAL TONS
15
20
30
40
45
Conventions Used in This Manual — The following conventions for discussing configuration points for the
local display (scrolling marquee or Navigator™ accessory)
will be used in this manual.
Point names will be written with the mode name first, then
any sub-modes, then the point name, each separated by an
arrow symbol (. Names will also be shown in bold
and italics. As an example, the Minimum Load Valve Select
Point, which is located in the Configuration mode, Option 1
sub-mode, would be written as ConfigurationOPT1
MLV.S.
This path name will show the user how to navigate through
the local display to reach the desired configuration. The user
would scroll through the modes and sub-modes using the
and
keys. The arrow symbol in the path name
represents pressing ENTER to move into the next level of the
menu structure.
MODE
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Alarm Status
Outputs
Configuration
Time Clock
ESCAPE
ENTER
Operating Modes
Alarms
Fig. 1 — Scrolling Marquee Display
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press
ENTER so that the item value flashes. Use the arrow keys to
change the value or state and press the ENTER key to accept
it. Press the ESCAPE key to return to the next higher level of
structure. Repeat the process as required for other items.
When a value is included as part of the path name, it will be
shown at the end of the path name after an equals sign. If the
value represents a configuration setting, an explanation will
be shown in parenthesis after the value. As an example,
ConfigurationOPT1MLV.S = YES (Minimum Load
Valve Select).
Pressing the ESCAPE and ENTER keys simultaneously
will scroll an expanded text description of the point name or
value across the display. The expanded description is shown in
the local display tables but will not be shown with the path
names in text.
Items in the Configuration and Service Test modes are password protected. The words ‘PASS’ and ‘WORD’ will alternate
on the display when required. The default password is 0111.
Press ENTER and the 1111 password will be displayed. Press
ENTER again and the first digit will begin to flash. Use the
arrow keys to change the number and press ENTER to accept
the digit. Continue with the remaining digits of the password.
The password can only be changed through CCN operator interface software such as ComfortWORKS®, ComfortVIEW™
and Service Tool.
The CCN (Carrier Comfort Network®) point names are also
referenced in the local display tables for users configuring the
unit with CCN software instead of the local display. The CCN
tables are located in Appendix B of the manual.
Basic Control Usage
See Table 3 and Appendix A for further details.
SCROLLING MARQUEE DISPLAY — The scrolling marquee display is the standard interface display to the ComfortLink
control system for 30MP units. The display has up and down arrow keys, an ENTER key, and an ESCAPE key. These keys
are used to navigate through the different levels of the display
ACCESSORY NAVIGATOR™ DISPLAY MODULE —
The Navigator module provides a mobile user interface to the
ComfortLink control system. The display has up and down
arrow keys, an ENTER key, and an ESCAPE key. These
3
to the Configuration mode. Press ENTER to obtain access to
this mode. The display will read:
keys are used to navigate through the different levels of the display structure. Press the ESCAPE key until ‘Select a Menu
Item’ is displayed to move through the top 11 mode levels
indicated by LEDs on the left side of the display. See Fig. 2.
> TEST OFF
METR OFF
LANG ENGLISH
Pressing ENTER will cause the “OFF” to flash. Use the up
or down arrow to change “OFF” to “ON”. Pressing ENTER
will illuminate all LEDs and display all pixels in the view
screen. Pressing ENTER and ESCAPE simultaneously
allows the user to adjust the display contrast. Use the up or
down arrows to adjust the contrast. The screen’s contrast will
change with the adjustment. Press ENTER to accept the
change. The Navigator module will keep this setting as long as
it is plugged in to the LEN bus.
Once within a Mode or sub-mode, a “>” indicates the currently selected item on the display screen. Pressing the
ENTER and ESCAPE keys simultaneously will put the Navigator module into expanded text mode where the full meaning
of all sub-modes, items and their values can be displayed. Pressing the ENTER and ESCAPE keys when the display says
‘Select Menu Item’ (Mode LED level) will return the Navigator
module to its default menu of rotating display items (those items
in Run StatusVIEW). In addition, the password will be disabled, requiring that it be entered again before changes can be
made to password protected items. Press the ESCAPE key to
exit out of the expanded text mode.
Adjusting the Backlight Brightness — The backlight of the
display can be adjusted to suit ambient conditions. The factory
default is set to the highest level. To adjust the backlight of the
Navigator module, press the ESCAPE key until the display
reads, “Select a menu item.” Using the arrow keys move to the
Configuration mode. Press ENTER to obtain access to this
mode. The display will read:
> TEST OFF
METR OFF
LANG ENGLISH
Pressing ENTER will cause the “OFF” to flash. Use the up
or down arrow keys to change “OFF” to “ON”. Pressing
ENTER will illuminate all LEDs and display all pixels in the
view screen. Pressing the up and down arrow keys simultaneously allows the user to adjust the display brightness. Use the
up or down arrow keys to adjust screen brightness. Press
ENTER to accept the change. The Navigator module will
keep this setting as long as it is plugged in to the LEN bus.
NOTE: When the Language Selection (Configuration
DISPLANG), variable is changed, all appropriate display
expansions will immediately change to the new language. No
power-off or control reset is required when reconfiguring
languages.
When a specific item is located, the item name appears on the
left of the display, the value will appear near the middle of the
display and the units (if any) will appear on the far right of the
display. Press the ENTER key at a changeable item and the value will begin to flash. Use the up and down arrow keys to change
the value, and confirm the value by pressing the ENTER key.
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press
ENTER so that the item value flashes. Use the arrow keys to
change the value or state and press the ENTER key to accept
it. Press the ESCAPE key to return to the next higher level of
structure. Repeat the process as required for other items.
Items in the Configuration and Service Test modes are password protected. The words Enter Password will be displayed
when required, with 1111 also being displayed. The default
password is 1111. Use the arrow keys to change the number
and press ENTER to enter the digit. Continue with the remaining digits of the password. The password can only be
changed through CCN operator interface software such as
ComfortWORKS, ComfortVIEW and Service Tool.
Com
fortL
MOD
Run
ink
E
Alarm
Status
Status
Servic
e Tes
t
Tem
peratu
res
Pressu
res
Setpo
ints
Inputs
Outpu
ts
Config
uration
Time
Clock
Opera
ting
Modes
Alarm
s
Adjusting the Contrast — The contrast of the display can be
adjusted to suit ambient conditions. To adjust the contrast of
the Navigator module, press the ESCAPE key until the display reads, “Select a menu item.” Using the arrow keys move
ENTE
ESC
R
Fig. 2 — Accessory Navigator™ Display Module
4
Table 2 — Scrolling Marquee Display Menu Structure*
MODE
SUB-MODE
RUN
SERVICE
STATUS
TEST
Auto
Service
View of
Test Mode
Run Status
(TEST)
(VIEW)
Unit Run
Outputs
Hour and
and Pumps
Start
(OUTS)
(RUN)
Circuit and
A Comp
Compressor CiruitTest
Run Hours
(CMPA)
(HOUR)
TEMPERATURES PRESSURES
Unit Temperatures
(UNIT)
Temperatures
Circuit A
(CIR.A)
Pressures
Circuit A
(PRC.A)
SET
POINTS
INPUTS
OUTPUTS
CONFIGURATION
TIME
CLOCK
OPERATING
MODES
ALARMS
Cooling
Setpoints
(COOL)
General
Inputs
(GEN.I)
General
Outputs
(GEN.O)
Display
Configuration
(DISP)
Time of
Day
(TIME)
Modes
(MODE)
Current
(CRNT)
Circuit
Inputs
(CRCT)
Outputs
Circuit A
(CIR.A)
Unit
Configuration
(UNIT)
Head
Pressure
Setpoint
(HEAD)
Brine
Freeze
Setpoint
(FRZ)
4-20mA
Inputs
(4-20)
Unit Options 1
Hardware
(OPT1)
Compressor
Starts
(STRT)
Unit Options 2
Controls
(OPT2)
Preventive
Maintenance
(PM)
CCN Network
Configuration
(CCN)
Software
Version
(VERS)
Reset Cool Temp
(RSET)
Set Point and
Ramp Load
(SLCT)
Service
Configuration
(SERV)
Broadcast
Configuration
(BCST)
LEGEND
Ckt — Circuit
*Throughout this text, the location of items in the menu structure will be
described in the following format:
Item Expansion (Mode NameSub-mode NameITEM)
For example, using the language selection item:
Language Selection (ConfigurationDISPLANG)
5
Month,
Date, Day,
and Year
(DATE)
Daylight
Savings
Time
(DST)
Local
Holiday
Schedules
(HOL.L)
Schedule
Number
(SCH.N)
Local
Occupancy
Schedule
(SCH.L)
Schedule
Override
(OVR)
Reset
Alarms
(RCRN)
Alarm
History
(HIST)
Table 3 — Operating Modes
MODE
NO.
ITEM EXPANSION
DESCRIPTION
01
CSM CONTROLLING CHILLER
Chillervisor System Manager (CSM) is controlling the chiller.
02
WSM CONTROLLING CHILLER
Water System Manager (WSM) is controlling the chiller.
03
MASTER/SLAVE CONTROL
Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature
is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling
Ramp Loading (ConfigurationSLCTCRMP). The pull-down limit can be modified, if
desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.
TIMED OVERRIDE IN EFFECT
Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed
schedule, forcing unit to Occupied mode. Override can be implemented with unit under
Local (Enable) or CCN (Carrier Comfort Network®) control. Override expires after each use.
LOW COOLER SUCTION TEMPA
Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Saturated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If
the saturated suction temperature is less than the Brine Freeze Point (Set PointsFRZ
BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F
(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the saturated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for
90 seconds, a stage of capacity will be removed from the circuit. The control will continue to
decrease capacity as long as either condition exists.
05
06
07
09
SLOW CHANGE OVERRIDE
10
MINIMUM OFF TIME ACTIVE
DUAL SETPOINT
13
DEMAND LIMITED
Demand limit is in effect. This indicates that the capacity of the chiller is being limited by
demand limit control option. Because of this limitation, the chiller may not be able to produce the desired leaving fluid temperature. Demand limit can be controlled by switch inputs
or a 4 to 20 mA signal.
COOLER FREEZE PROTECTION
Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section
for definition). The chiller will be shut down when either fluid temperature falls below the
Freeze point.
LOW TEMPERATURE COOLING
Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and
decreasing faster than -0.5° F per minute. Error between leaving fluid and control point
exceeds fixed amount. Control will automatically unload the chiller if necessary.
HIGH TEMPERATURE COOLING
Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.
Error between leaving fluid and control point exceeds fixed amount. Control will automatically
load the chiller if necessary to better match the increasing load.
16
17
18
MAKING ICE
STORING ICE
MINIMUM COMP ON TIME
Cooling load may be satisfied, however control continues to operate compressor to ensure
proper oil return. May be an indication of oversized application, low fluid flow rate or low loop
volume.
PUMP OFF DELAY TIME
Cooling load is satisfied, however cooler pump continues to run for the number of minutes set
by the configuration variable Cooler Pump Shutdown Delay (ConfigurationOPT1
PM.DY).
24
LOW SOUND MODE
—
—
—
Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set PointsCOOL
CSP.2). The ice done input to the Energy Management Module (EMM) is closed.
Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than
the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity
may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature.
23
CSM
SCT
WSM
Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set PointsCOOL
CSP.3) to make ice. The ice done input to the Energy Management Module (EMM) is open.
HIGH SCT CIRCUIT A
21
25
Chiller is being held off by Minutes Off Time (ConfigurationOPT2DELY).
Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set PointsCOOL
CSP.1) during occupied periods and Cooling Set Point 2 (Set PointsCOOLCSP.2)
during unoccupied periods.
Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leaving fluid set point upward and is currently controlling to the modified set point. The set point
can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to
20 mA signal.
15
20
Slow change override is in effect. The leaving fluid temperature is close to and moving
towards the control point.
TEMPERATURE RESET
14
19
Dual Chiller control is enabled.
RAMP LOAD LIMITED
Operating mode does not apply to 30MP chillers.
LEGEND
Chillervisor System Manager
Saturated Condensing Temperature
Water System Manager
6
persists, replace the MBB. A red LED that is lit continuously or
blinking at a rate of once per second or faster indicates that the
board should be replaced.
GREEN LED — The MBB has one green LED. The Local
Equipment Network (LEN) LED should always be blinking
whenever power is on. All other boards have a LEN LED
which should be blinking whenever power is on. Check LEN
connections for potential communication errors at the board J3
and/or J4 connectors. Communication between modules is
accomplished by a 3-wire sensor bus. These 3 wires run in
parallel from module to module. The J4 connector on the MBB
provides both power and communication directly to the
marquee display only.
YELLOW LED — The MBB has one yellow LED. The
Carrier Comfort Network (CCN) LED will blink during times
of network communication.
CONTROLS
General — The 30MP liquid scroll chillers contain the
ComfortLink electronic control system that controls and monitors all operations of the chiller.
The control system is composed of several components as
listed in the sections below. See Fig. 3 for a typical control box
drawing. See Fig. 4 and 5 for power and control schematics.
Main Base Board (MBB) — See Fig. 6. The MBB is
the heart of the ComfortLink control system. It contains the
major portion of operating software and controls the operation
of the machine. The MBB continuously monitors input/output
channel information received from its inputs and from all other
modules. The MBB receives inputs from the discharge and
suction pressure transducers and thermistors. See Table 4. The
MBB also receives the feedback inputs from each compressor
current sensor board and other status switches. See Table 5.
The MBB also controls several outputs. Relay outputs controlled by the MBB are shown in Table 6. Information is transmitted between modules via a 3-wire communication bus or
LEN (Local Equipment Network). The CCN (Carrier Comfort
Network) bus is also supported. Connections to both LEN and
CCN buses are made at the LVT (low voltage terminal).
Carrier Comfort Network® (CCN) Interface —
The 30MP chiller units can be connected to the CCN if
desired. The communication bus wiring is a shielded,
3-conductor cable with drain wire and is supplied and installed
in the field. See Table 7. The system elements are connected to
the communication bus in a daisy chain arrangement. The
positive pin of each system element communication connector
must be wired to the positive pins of the system elements on
either side of it. This is also required for the negative and
signal ground pins of each system element. Wiring connections
for CCN should be made at LVT. Consult the CCN Contractor’s Manual for further information.
NOTE: Conductors and drain wire must be 20 AWG (American Wire Gage) minimum stranded, tinned copper. Individual
conductors must be insulated with PVC, PVC/nylon, vinyl,
Teflon*, or polyethylene. An aluminum/polyester 100% foil
shield and an outer jacket of PVC, PVC/nylon, chrome vinyl,
or Teflon with a minimum operating temperature range of
–20 C to 60 C is required. Wire manufactured by Alpha (2413
or 5463), American (A22503), Belden (8772), or Columbia
(02525) meets the above mentioned requirements.
It is important when connecting to a CCN communication
bus that a color coding scheme be used for the entire network
to simplify the installation. It is recommended that red be used
for the signal positive, black for the signal negative, and white
for the signal ground. Use a similar scheme for cables containing different colored wires.
At each system element, the shields of its communication
bus cables must be tied together. If the communication bus is
entirely within one building, the resulting continuous shield
must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another,
the shields must be connected to grounds at the lightning
suppressor in each building where the cable enters or exits the
building (one point per building only). To connect the unit to
the network:
1. Turn off power to the control box.
2. Cut the CCN wire and strip the ends of the red (+), white
(ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.)
3. Connect the red wire to (+) terminal on LVT of the plug,
the white wire to COM terminal, and the black wire to the
(–) terminal.
4. The RJ14 CCN connector on LVT can also be used, but is
only intended for temporary connection (for example, a
laptop computer running Service Tool).
Energy Management Module (EMM) — The EMM
module is available as a factory-installed option or as a fieldinstalled accessory. The EMM module receives 4 to 20 mA
inputs for the leaving fluid temperature reset, cooling set point
and demand limit functions. The EMM module also receives
the switch inputs for the field-installed 2-stage demand limit
and ice done functions. The EMM module communicates the
status of all inputs with the MBB, and the MBB adjusts the
control point, capacity limit, and other functions according to
the inputs received.
Current Sensor Board (CSB) — The CSB is used to
monitor the status of the compressors by measuring current and
providing an analog input to the main base board (MBB).
Enable/Off/Remote Contact Switch — The Enable/
Off/Remote Contact switch is a 3-position switch used to
control the chiller. When switched to the Enable position the
chiller is under its own control. Move the switch to the Off
position to shut the chiller down. Move the switch to the
Remote Contact position and a field-installed dry contact can
be used to start the chiller. The contacts must be capable of
handling a 24 vac, 50-mA load. In the Enable and Remote
Contact (dry contacts closed) positions, the chiller is allowed to
operate and respond to the scheduling configuration, CCN
configuration and set point data. See Fig. 7.
Emergency On/Off Switch — The Emergency On/Off
switch should only be used when it is required to shut the
chiller off immediately. Power to the MBB, EMM, and
marquee display is interrupted when this switch is off and all
outputs from these modules will be turned off. See Fig. 7.
Board Addresses — The main base board (MBB) has a
3-position instance jumper that must be set to ‘1.’ The EMM
board has 4-position DIP switches. All switches are set to ‘On’
for all boards except the AUX2 board. The AUX2 board DIP
switch settings are shown on the wiring schematic.
Control Module Communication
RED LED — Proper operation of the control boards can be
visually checked by looking at the red status LEDs
(light-emitting diodes). When operating correctly, the red status
LEDs should be blinking in unison at a rate of once every
2 seconds. If the red LEDs are not blinking in unison, verify
that correct power is being supplied to all modules. Be sure that
the main base board (MBB) is supplied with the current software. If necessary, reload current software. If the problem still
* Registered trademark of DuPont.
7
LEGEND FOR FIG. 3-5
ALMR
AUX
C
CB
CCB
CH
CCH
CNFS
CNPI
COMP
CR
CSB
CWFS
CWP
DGS
DPT
DTT
DUS
EMM
EWT
FB
FIOP
FU
GND
HPS
LLSV
LON
LVT
LWT
MBB
MLV
MP
NEC
OAT
PL
RLY
SPT
SW
TB
TRAN
UPC
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Alarm Relay
Auxilliary
Contactor, Compressor
Circuit Breaker
Compressor Circuit Breaker
Crankcase Heater
Crankcase Heater Relay
Condenser Water Flow Switch
Condenser Pump Interlock
Compressor
Control Relay
Current Sensor Board
Chilled Water Flow Switch
Chilled Water Pump
Digital Scroll Compressor
Discharge Pressure Transducer
Discharge Temperature Thermistor
Digital Unloader Solenoid
Energy Management
Entering Water Temperature
Fuse Block
factory Installed Option
Fuse
Ground
High-Pressure Switch
Liquid Line Solenoid Valve
Local Operating Network
Low Voltage Terminal
Leaving Water Temperature
Main Base Board
Minimum Load Valve
Modular Motor Protection
National Electrical Code
Outdoor-Air Thermistor
Plug
Relay
Suction Pressure Transducer
Switch
Terminal Block
Transformer
Unitary Protocol Converter
Terminal Block
Terminal (Unmarked)
Terminal (Marked)
Splice
Factory Wiring
Field Wiring
Accessory or Option Wiring
To indicate common potential only; not to represent wiring.
8
EQUIP
GND
TB3
UPC LON
OPTION
UPC
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
LVT
DISCONNECT
OPTION CB1A/TB1A
L1
L2
L3
CCB-1
CCB-2
CCB-3
EMM
CSB-A1
2
4
CSB-A2
CSB-A3
6
CCH
CA1
CA2
CA3
TRAN1
MBB
FB1
LOCATED OVER EMM
CB1
CB2
CB3
REMOTE
CONTROL
SW1
OFF
ENABLE
Fig. 3 — Typical Control Box — 30MP015-045 Units
a30-4963
9
OFF
SW2
ON
TO FUSED
DISCONNECT
PER NEC
10
RED
B1
A1
SW2
XF
FU3
VIO
VIO
380V ONLY
CB3
3.2 AMPS
C1
RED
EQUIP GND
CONNECT FOR
APPROPRIATE
PRIMARY VOLTAGE
SEE TABLE 1
RED
21
X3
X1
H1
TRAN1
PRIMARY
H3
H2
BRN
3
1
2
AUX2
J1
1 HOT
GND
24VAC
UPC
UPC FIOP
11
12
DGS FIOP
J1
MBB
J2
VIO
1
2
1
2
3
2
1
2
3
2
3
BRN
VIO
BRN
VIO
BRN
BRN
1
TB3
GRN/YEL
YEL
FU2
X2
BLK
TB1A
FU1
H4
13
L3
WHT
12
11
1
2
3
RED
BRN
YEL
BLK
23
22
21
STANDARD
TERMINAL
BLOCK
L2
L1
SECONDARY 24V
380V UNITS ONLY
NEUTRAL
6
L3
11
4
2
L2
L1
CB1A
OPTIONAL
DISCONNECT
TO FUSED DISCONNECT
PER NEC
a30-4965
1
H1 & H4
H3 & H4
H2 & H4
H1 & H2
H1 & H5
13
BLU
23
22
21
23
BLU
23
22
21
(MPA ONLY)
FU5
FU4
FB1
BLK
CSB-A2
CSB-A1
CA3
UNIT VOLTAGE
YEL
6. FOR 500 SERIES UNIT OPERATION AT 208-3-60V LINE VOLTAGE,
TRAN1 PRIMARY CONNECTIONS MUST BE MOVED TO TERMINALS H3
& H4.
3. ALL FIELD INTERLOCK CONTACTS MUST HAVE A MIN RATING OF
2 AMPS @ 24VAC SEALED. SEE FIELD INTERLOCK WIRING.
4. COMPRESSOR AND FAN MOTORS ARE THERMALLY PROTECTED-THREE PHASE MOTORS PROTECTED AGAINST PRIMARY SINGLE
PHASE CONDITIONS.
5. TERMINALS 14 & 15 OF LVT ARE FOR FIELD CONNECTION
OF REMOTE ON-OFF. THE CONTACT MUST BE RATED FOR DRY
CIRCUIT APPLICATION CAPABLE OF HANDLING A 5VDC
1 MA TO 20 MA LOAD.
WHT
208/230-3-60
CCH
T2
T1
NONE
FNQ-R-3
FNQ-R-10
FNQ-R-1.5
FNQ-R-1.5
REPLACE
WITH
FNQ-R-3
FNQ-R-2
BLU
YEL
BLK
BLU
YEL
BLK
BLU
YEL
BLK
YEL
BLK
YEL
BLK
YEL
BLK
3
2
1
3
2
1
3
2
1
T1
BLK
BLK
BLK
BLK
BLK
BLK
12. IF CHILLED WATER PUMP INTERLOCK IS USED,
REMOVE JUMPER FROM TERMINAL 16 TO 17 AND
WIRE INTERLOCK CONTACT ACROSS TERMINALS 16 & 17.
11. JUMPER PLUG REQUIRED WHEN MP NOT USED
10. MP-A3 NOT USED IN THE FOLLOWING UNITS:
040,045: 460V UNITS
9. MP-A2 NOT USED IN THE FOLLOWING UNITS:
015,020: ALL UNITS
030-045: 460V UNITS
8. MP-A1 NOT USED IN THE FOLLOWING UNITS:
015,020: ALL UNITS
030-045: 460V UNITS WITHOUT DIGITAL SCROLL
CH-A3
CH-A2
CH-A1
GRN/YEL
COMP A3
(040,045 ONLY)
GRN/YEL
COMP A2
GRN/YEL
COMP A1
(040,045 ONLY)
PL13-2
PL13-1
PL12-2
PL12-1
PL11-2
PL11-1
T3
T2
T1
T3
T2
T1
T3
T2
7. MAX LOAD: 5VA SEALED, 10VA INRUSH
380V
UNITS ONLY
(MPA ONLY)
L2
L1
380-3-60,460-3-60,575-3-60
208/230-3-60
380-3-60,460-3-60,575-3-60
200VA
250VA
575-3-60
TRAN
SIZE
380-3-60
460-3-60
208/230-3-60
BLK
23
22
21
23
22
21
23
22
21
(040,045 ONLY)
13
BLU
11
13
12
12
CSB-A3
CA2
CA1
11
13
12
11
YEL
BLK
BLU
YEL
BLK
BLU BLK
YEL
BLU
YEL
NOT USED ON
380V UNITS
FU4 & FU5
FU3 (24V)
FU1 & FU2
FUSE
NUMBER
(040,045 ONLY)
13
YEL
WHT
YEL
BLK
CCB-3
11
12
BLK
015,020,040: 208/230V ONLY
030,045: 202/230V,380V ONLY
12
11
CCB-2
13
YEL
BLK
BLU
22
21
1. FACTORY WIRING IS IN ACCORDANCE WITH UL 1995 STANDARDS.
ANY FIELD MODIFICATIONS OR ADDITIONS MUST BE IN
COMPLIANCE WITH ALL APPLICABLE CODES.
C MIN WIRE FOR FIELD POWER SUPPLY.
NOTES:
YEL
BLK
BLK
YEL
12
YEL
CCB-1
11
BLK
Fig. 4 — Typical Power Wiring Schematic — 30MP015-045 Units
600
460-3-60
500
230-3-60
500
200
208-3-60
100
SERIES
3
2
TERMINAL
CONNECTIONS
FOR PRIMARY SIDE
TABLE 1
J1
EMM
J2
380-3-60
VOLTAGE
1
2
3
FIOP/ACCESSORY
575-3-60
1
2
3
BLU
BLU
BLU
YEL
YEL
YEL
BLK
BLK
BLK
015,020,040: 380V,460V,575V ONLY
030,045: 460V,575V ONLY
TRAN1
A2
CB2
3.2 AMPS
ORN
MBB
J10A
2
J12
17
18
BRN
2
BRN
CWFS-3
6
20
7
19
CR
3
BRN
LLSV-A
PNK
18
1
RED
RED
LLSV-A
9
(MPA AND BRINE ONLY)
BLU
BLK
BLK
PNK
PL1-1
ORN
13
22
14 BLK
VIO
M1
18
M2
VIO
M2
VIO
C2
BRN
MLV-A
PL1-4
M2
VIO
ORN
C1
CA1
C2
BRN
BRN
PL2-4
GRA
C1
CA2
C2
BRN
PL2-4
VIO
C1
CA3
C2
VIO
VIO
(040,045 ONLY)
GRA
BRN
GRA
1
J11
5
2
4
3
RED
3
5
BLK
2
1
5
4
3
REMOTE
ON-OFF
SWITCH
(SEE
NOTE 5)
PNK
J6
2
RED
T2
1
PNK
RED
WHT
10
VIO
6
7
14
9
10
1
8
RED
8
OFF
SW1
A1 ENABLE
RED
C1
B1
13
9
12
10
7
6
5
BLU
11
4
J4
9
3
4
5
8
6
7
1
6
5
4
J3
2
3
4
J7
MAIN
BASE
BOARD
1
2
3
4
CNPI
5
BLU
12
CNFS
VIO
13
11
3
2
J9
3
6
7
8
9
2
10
1
14
11
1
12
1
2
3
4
5
6
1
2
3
4
RED
RED
WHT
WHT
BLK
BLK
BRN
RED
RED
BRN
1
MARQUEE
DISPLAY
1
2
2
3
PNK
RED
MP-A1 T1
SEE NOTE 9
PL2-3
T2
MP-A2 T1
SEE NOTE 10
PL3-3
2
ORN
DUAL
SETPOINT
SEE NOTE 8
PL1-3
2
15
LLSV-A
BRN
C2
CCH
BRN
2
TB3
BRN
C2
CA1
BRN
C2
CA1
BRN
C2
CA2
BRN
C2
CA2
BRN
C2
CA3
3
CWFS
BRN
6
4
16
PL3-4
BRN
MLV FIOP
PNK
CWFS
BRN
PNK
6
4
CCH
C2
BRN
MLV-A
CWPI
(SEE
NOTE
12)
PL3-4
BRN
PL3-2
GRA
BLK
17
CA3
C2
BRN
PL2-2
MP-A2
MP-A3
SEE NOTE 11
MLV-A
(MPA ONLY)
VIO
PL3-1
VIO
17
27
M1
SEE NOTE 11
16
26
VIO
PL2-1
GRA
15
24
M1
TB3
BRN
PL1-2
MP-A1
VIO
SEE NOTE 11
CCH
C1
BLU
HPS-A
BLK
3
BRN
BRN
GRA
8
12
21
LVT
X2 TRAN1
J11
11
20
25
ORN
10
19
RLY 3
BLU
7 ORN
16
23
1
6
15
RLY 2
TB3
CR
24
5
14
RLY 4
ALMR
25
CWP RELAY
SEE NOTE 7
4 ORN
13
RLY 1
TB3
3
12
RLY 8
PNK
2
11
RLY 7
1
1
10
RLY 6
BRN
ALARM RELAY
SEE NOTE 7
9 ORN
9
GRN/YEL
LVT
1
8
8
X2
J12
7
7
RLY 5
PNK
PNK
GRA
6 ORN
6
SECONDARY 24V
CB1
3.2 AMPS
5
5
RLY 10
X1
FU3
4
4
J10B
XF
ORN
3 ORN
3
RLY 9
C2
RED
RED
2
2
RLY 11
ORN
1
1
B2
SW2
T2
MP-A3 T1
BLU
BRN
PL1-4
BRN
PL2-4
BRN
PL3-4
BRN
3
4
4
5
5
6
6
RED
WHT
BLK
1
2
AUX2
3
4
5
6
7
8
9
10
11
12
RED
2
ORN
3
BRN
1
RED
2
ORN
3
BRN
1
RED
2
ORN
3
BRN
1
6
CSB
A2
5
4
BLK
CSB
A3 (040,045 ONLY)
WHT
RED
3
2
1
3
-
2
G
1
+
3
-
2
G
1
+
CSB
A1
J9
J2
DGS
FIOP
J6
-
7
CH1
8
CH11
1
-
2
7
8
1
2
DUS
VIO
BRN
DTT
RED
BLK
ON
OFF
1
2
3
LVT
4
LEN
J13
(+)
CCN
WHT
(COM)
BLK
(-)
RED
SHIELD
J1
1
BLK
2
WHT
3
RED
4
BRN
5
RED
6
BLK
7
WHT
8
RED
BRN
RED
BLK
WHT
RED
BLK
WHT
RED
10
9
8
7
6
5
4
3
2
1
5
10
6
9
7
8
8
7
6
5
J5
9
10
4
11
3
2
1
J8
12
13
14
15
16
UPC
RED
PORT 2
1 NET +
BLK
2 NET 3 N/C
4 N/C
WHT
5 SIGNAL
PORT 1A
1 NET +
17
LON
OPTION
18
J3 GND
19
NET
J4
1
2
2 NET 2
3 SHIELD
UPC OPT
20
21
22
23
24
25
26
1 2 3 4 5 6 7 8
CONDENSER EWT
ACCESSORY
1
DARK = SWITCH LOCATION
2
CONDENSER LWT
ACCESSORY
3
4
5
6
1
BLU
LVT
J12
T55
3
23
VIO
4
22
RED
5
21
SEN
T-55
ACCSY
BLK
2
OAT ACCESSORY OR
DUAL CHILLER LWT
RGTA
ACCESSORY
3
LVT
4
WHT
RED
3
2
1
4
3
2
J3
1
EMM
2
3
4
1
5
6
4
1
2
3
4
4
COOLER ENTERING
FLUID TEMP
RED
BLK
BLK
COOLER LEAVING
FLUID TEMP
RED
WHT
RED
3
2
1
J7
4
3
2
J4
7
8
9
10
11
1
12
BLK
1
13
2
14
FIOP/
ACCESSORY
3
1
4
2
5
8
9
10
11
12
3
a30-5339
6
7
RED
GRN
BLK
RED
GRN
BLK
B
C
A
+
4
5
J6
DPTA
-
6
7
8
9
B
C
+
A
-
10
11
SPTA
12
Fig. 5 — Typical Control Wiring Schematic — 30MP015-045 Units
11
1
2
3
4
5
6
7
J10
GRA
17
1
GRA
16
2
RED
15
3
RED
14
4
BLU
13
5
BLU
12
6
11
8
ICE DONE
DLS STEP 1
DLS STEP 2
9
10
11
12
13
14
10
1
2
3
4
5
6
9
10
11
12
7
8
8
7
BRN
6
5
ORN
+ DEMAND
LIMIT
- 4-20mA
9
+ TEMP
RESET
- 4-20mA
10
+ COOLING
SETPOINT
- 4-20mA
4
3
7
8
9
VIO
2
PNK
1
Sensors — The electronic control uses 2 to 7 thermistors to
IMPORTANT: A shorted CCN bus cable will prevent some
routines from running and may prevent the unit from starting. If abnormal conditions occur, unplug the connector. If
conditions return to normal, check the CCN connector and
cable. Run new cable if necessary. A short in one section of
the bus can cause problems with all system elements on the
bus.
sense temperatures for controlling chiller operation. See
Table 4. These sensors are outlined below. Thermistors cooler
leaving fluid, cooler entering fluid, discharge temperature, circuit A return gas temperature, outdoor-air temperature sensor
or dual LWT sensor, accessory remote space temperature sensor, condenser entering fluid temperature sensor, and condenser leaving fluid temperature sensor are identical in temperature
versus resistance and voltage drop performance. The dual chiller thermistor (DLWT) is 5,000 ohmsat 77 F (25 C)thermistor.
Space temperature thermistor (SPT) is a 10,000 ohmsat 77 F
(25 C). See Thermistors section for temperature-resistancevoltage drop characteristics.
COOLER LEAVING FLUID SENSOR (LWT) — The thermistor is installed in a well in the factory-installed leaving fluid
piping coming from the bottom of the brazed-plate heat
exchanger.
COOLER ENTERING FLUID SENSOR (EWT) — The thermistor is installed in a well in the factory-installed entering fluid
piping coming from the top of the brazed-plate heat exchanger.
CONDENSER LEAVING FLUID SENSOR (CDLT) — The
thermistor is installed in a well in the field-installed leaving
fluid piping coming from the bottom of the brazed-plate heat
exchanger. The thermistor is a field-installed accessory. See
Table 8 for thermistor and well part numbers.
CONDENSER ENTERING FLUID SENSOR (CDET) — The
thermistor is installed in a well in the field-installed entering
fluid piping coming from the top of the brazed-plate heat
exchanger. See Table 8 for thermistor and well part numbers.
COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGT.A) — This accessory thermistor can be installed
in a well located in the suction line. Use Carrier part number
HH79NZ029.
OUTDOOR-AIR TEMPERATURE SENSOR (OAT) —
This sensor is an accessory that is remotely mounted and used
for outdoor air temperature reset. See Table 4. Use Carrier part
number HH79NZ023.
DUAL LEAVING WATER TEMPERATURE SENSOR
(DLWT) — This input can be connected to the LVT. See Table 4. For dual chiller applications (parallel only are supported), connect the dual chiller leaving fluid temperature sensor
(see Table 8 for thermistor and well part numbers) to the outside air temperature input of the Master chiller. If outside-air
temperature is required for reset applications, connect the sensor to the Slave chiller and configure the slave chiller to broadcast the value to the Master chiller.
DISCHARGE
TEMPERATURE
THERMISTOR
(D.GAS) — This sensor is only used on units with a digital
compressor. The sensor is mounted on the discharge line close
to the discharge of the digital compressor. It attaches to the discharge line using a spring clip and protects the system from
high discharge gas temperature when the digital compressor is
used. This sensor is a connected to the AUX board.
REMOTE SPACE TEMPERATURE SENSOR (SPT) —
The sensor (part no. 33ZCT55SPT) is an accessory sensor that
is remotely mounted in the controlled space and used for space
temperature reset. The sensor should be installed as a wallmounted thermostat would be (in the conditioned space where
it will not be subjected to either a cooling or heating source or
direct exposure to sunlight, and 4 to 5 ft above the floor).
Space temperature sensor wires are to be connected to
terminals in the unit main control box. The space temperature
sensor includes a terminal block (SEN) and a RJ11 female
connector. The RJ11 connector is used access into the Carrier
Comfort Network® (CCN) at the sensor.
Table 4 — Thermistor Designations
SCROLLING
MARQUEE
PIN
THERMISTOR CONNECTION
DISPLAY
POINT
NAME
CLWT
J8-13,14 (MBB)
CEWT
J8-11,12 (MBB)
J6-12 (AUX2)
D.GAS
J8-9,10 (MBB)
RGTA
J8-6,7 (MBB),
LVT-21,22
OAT/DLWT
J8-5,6 (MBB)
LVT-22,23
J8-1,2 (MBB)
SPT
CDET
J8-3,4 (MBB)
CDLT
THERMISTOR INPUT
Cooler Leaving Fluid
Cooler Entering Fluid
Discharge Temperature
Thermistor (Digital Compressor Option Only)
Circuit A Return Gas
Temperature (accessory)
Outdoor-Air Temperature
Sensor (accessory) or Dual
LWT Sensor
Accessory Remote Space
Temperature Sensor
Condenser Entering Water
Temperature Sensor
(30MPW Only)
Condenser Leaving Water
Temperature Sensor
(30MPW Only)
LEGEND
LWT — Leaving Water Temperature
MBB — Main Base Board
Table 5 — Status Inputs
STATUS SWITCH
Condenser Flow Switch
Dual Set Point
Remote On/Off
Cooler Flow Switch Interlock
Compressor Fault Signal, A1
Compressor Fault Signal, A2
Compressor Fault Signal, A3
PIN CONNECTION POINT
LVT-11,17, J7-2, J6-2 (MBB)
LVT-12,13, J7-3,4 (MBB)
LVT-14,15, J7,8 (MBB)
LVT-16,17, J6-2, J7-10 (MBB)
J9-11,12 (MBB)
J9-5,6 (MBB)
J9-8,9 (MBB)
Table 6 — Output Relays
RELAY
NO.
K1
K2
K3
K4
K7
K8
K9
K10
K11
DESCRIPTION
Energize Compressor A1
Energize Compressor A2
Energize Compressor A3
Energize Minimum Load Valve
Liquid Line Solenoid Valve
Crankcase Heater Relay (30MPA Only)
Chilled Water Pump
Condenser Fan/Pump
Alarm Relay
Table 7 — CCN Communication Bus Wiring
MANUFACTURER
Alpha
American
Belden
Columbia
Manhattan
Quabik
PART NO.
Regular Wiring
Plenum Wiring
1895
—
A21451
A48301
8205
884421
D6451
—
M13402
M64430
6130
—
12
2. Connect the other ends of the wires to terminals 3 and 4
on LVT located in the unit control box.
Units on the CCN can be monitored from the space at the
sensor through the RJ11 connector, if desired. To wire the RJ11
connector into the CCN (Fig. 9):
Table 8 — Thermistors and Wells
THERMISTOR
PART NO.
DESCRIPTION
WELL PART NO.
3 in., 5,000 ohm
Thermistor
4 in., 5,000 ohm
Thermistor
HH79NZ014
HH79NZ029
1DHB50106801
1DHB50106802
IMPORTANT: The cable selected for the RJ11 connector
wiring MUST be identical to the CCN communication bus
wire used for the entire network. Refer to Table 7 for
acceptable wiring.
To connect the space temperature sensor (Fig. 8):
1. Using a 20 AWG twisted pair conductor cable rated for
the application, connect 1 wire of the twisted pair to one
SEN terminal and connect the other wire to the other
SEN terminal located under the cover of the space
temperature sensor.
RED LED - STATUS
GREEN LED LEN (LOCAL EQUIPMENT NETWORK)
YELLOW LED CCN (CARRIER COMFORT NETWORK)
INSTANCE JUMPER
CEPL130346-01
K11
J1
J4
K8
STATUS
J2
K7
K10
K9
K5
K6
J10
LEN
J3
K4
K3
K1
K2
CCN
J5
J6
J7
J8
J9
Fig. 6 — Main Base Board
a30-4967
Fig. 7 — Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations
13
a30-4968
SPT (T10) PART NO. 33ZCT55SPT
CAUTION
Care should be taken when interfacing with other manufacturer’s control systems due to possible power supply
differences, full wave bridge versus half wave rectification.
The two different power supplies cannot be mixed.
ComfortLink controls use half wave rectification. A signal
isolation device should be utilized if a full wave bridge signal generating device is used.
SENSOR
SEN
LVT
SEN
3
4
Loss-of-Cooler Flow Protection — A proof-ofcooler flow device is factory installed in all chillers.
Fig. 8 — Typical Space Temperature
Sensor Wiring
Condenser Flow Protection — A proof-of-condenser flow protection accessory can be field installed in the condenser water piping of all chillers. The unit must be configured
for the input to be enabled.
T-55 SPACE
SENSOR
Thermostatic Expansion Valves (TXV) — All
units are equipped from the factory with conventional TXVs.
The 30MPA units and 30MPW units with medium temperature
brine also have factory-installed liquid line solenoids. The liquid line solenoid valves are not intended to be a mechanical
shut-off. For 30MPW units, when service is required, recover
the refrigerant from the system.
For 30MPA units when service is required, the compressor
and evaporator can be serviced by closing the factory-installed
liquid line service valve and field-installed discharge line service valve. After the valves are closed, recover the refrigerant
from the system.
The TXV is set at the factory to maintain approximately 8 to
12° F (4.4 to 6.7° C) suction superheat leaving the cooler by
monitoring the proper amount of refrigerant into the cooler. All
TXVs are adjustable, but should not be adjusted unless absolutely necessary.
6
TO CCN
COMM 1
BUS (PLUG)
AT UNIT
CCN+
5
CCN GND
4
3
CCN-
2
1
Fig. 9 — CCN Communications Bus Wiring
to Optional Space Sensor RJ11 Connector
1. Cut the CCN wire and strip ends of the red (+), white
(ground), and black (–) conductors. (If another wire color
scheme is used, strip ends of appropriate wires.)
2. Insert and secure the red (+) wire to terminal 5 of the
space temperature sensor terminal block.
3. Insert and secure the white (ground) wire to terminal 4 of
the space temperature sensor.
4. Insert and secure the black (–) wire to terminal 2 of the
space temperature sensor.
5. Connect the other end of the communication bus cable to
the remainder of the CCN communication bus.
Capacity Control — The control system cycles compressors, digital scroll modulating solenoid (if equipped), and
minimum load valve solenoids (if equipped) to maintain the
user-configured leaving chilled fluid temperature set point. Entering fluid temperature is used by the main base board (MBB)
to determine the temperature drop across the cooler and is used
in determining the optimum time to add or subtract capacity
stages. The chilled fluid temperature set point can be automatically reset by the return fluid temperature, space, or outdoor-air
temperature reset features. It can also be reset from an external
4 to 20-mA signal (requires energy management module FIOP
or accessory).
The capacity control algorithm runs every 30 seconds. The
algorithm attempts to maintain the Control Point at the desired
set point. Each time it runs, the control reads the entering and
leaving fluid temperatures. The control determines the rate at
which conditions are changing and calculates 2 variables based
on these conditions. Next, a capacity ratio is calculated using
the 2 variables to determine whether or not to make any
changes to the current stages of capacity. This ratio value
ranges from –100 to +100%. If the next stage of capacity is a
compressor, the control starts (stops) a compressor when the
ratio reaches +100% (–100%). If installed, the minimum load
valve solenoid will be energized as the last stage of capacity
before turning off the last compressor. A delay of 90 seconds
occurs after each capacity step change. Refer to Table 9.
MINUTES LEFT FOR START — This value is displayed
only in the network display tables (using Service Tool,
ComfortVIEW™ or ComfortWORKS® software) and
represents the amount of time to elapse before the unit will start
its initialization routine. This value can be zero without the
machine running in many situations. This can include being
unoccupied, ENABLE/OFF/REMOTE CONTACT switch in
the OFF position, CCN not allowing unit to start, Demand
Energy Management Module (Fig. 10) — This
factory-installed option (FIOP) or field-installed accessory is
used for the following types of temperature reset, demand
limit, and/or ice features:
• 4 to 20 mA leaving fluid temperature reset (requires
field-supplied 4 to 20 mA generator)
• 4 to 20 mA cooling set point reset (requires fieldsupplied 4 to 20 mA generator)
• Discrete inputs for 2-step demand limit (requires fieldsupplied dry contacts capable of handling a 24 vac,
50 mA load)
• 4 to 20 mA demand limit (requires field-supplied 4 to
20 mA generator)
• Discrete input for Ice Done switch (requires fieldsupplied dry contacts capable of handling a 24 vac,
50 mA load)
See Demand Limit and Temperature Reset sections on
pages 23 and 21 for further details.
14
value of 1.0. The range is from 1.0 to 4.0. When set to other
than 1.0, this factor is applied to the capacity Load/Unload
Factor. The larger this value is set, the longer the control will
delay between adding or removing stages of capacity. Figure
11 shows how compressor starts can be reduced over time if
the leaving water temperature is allowed to drift a larger
amount above and below the set point. This value should be set
in the range of 3.0 to 4.0 for systems with small loop volumes.
Figure 12 shows the operating envelope for the compressor.
First Stage Override — If the current capacity stage is zero,
the control will modify the routine with a 1.2 factor on adding
the first stage to reduce cycling. This factor is also applied
when the control is attempting to remove the last stage of
capacity.
Slow Change Override — The control prevents the capacity
stages from being changed when the leaving fluid temperature
is close to the set point (within an adjustable deadband) and
moving towards the set point.
Limit in effect, no call for cooling due to no load, and alarm or
alert conditions present. If the machine should be running and
none of the above are true, a minimum off time (DELY, see
below) may be in effect. The machine should start normally
once the time limit has expired.
MINUTES
OFF
TIME
(ConfigurationOPT2
DELY) — This user-configurable time period is used by the
control to determine how long unit operation is delayed after
power is applied/restored to the unit. Typically, this time period
is configured when multiple machines are located on a single
site. For example, this gives the user the ability to prevent all
the units from restarting at once after a power failure. A value
of zero for this variable does not mean that the unit should be
running.
CAPACITY CONTROL OVERRIDES — The following overrides will modify the normal operation of the routine.
Deadband Multiplier — The user configurable Deadband
Multiplier (ConfigurationSLCTZ.GN) has a default
J2
LEN
J3
TEST 1
PWR
J4
J1
STATUS
CEPL130351-01
CEBD430351-0396-01C
J5
J7
J6
RED LED - STATUS
TEST 2
GREEN LED LEN (LOCAL EQUIPMENT NETWORK)
Fig. 10 — Energy Management Module
15
ADDRESS
DIP SWITCH
Table 9 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve
CONTROL
STEPS
1
2
3
1
2
3
1
2
3
1
2
3
4
1
2
3
4
30MP UNIT SIZE
015
020
030
040
045
*Hot gas bypass (minimum load) valve energized.
CAPACITY STEPS
(% Displacement)
18*
50
100
25*
50
100
34*
50
100
21*
33
67
100
22*
33
67
100
NOTE: These capacity steps may vary due to different capacity
staging sequences.
2 STARTS
DEADBAND EXAMPLE
47
7
6
46
45
LWT (F)
LWT (C)
8
44
43
42
5
41
0
200
400
600
800
1000
3 STARTS
TIME (SECONDS)
LEGEND
LWT — Leaving Water Temperature
STANDARD
DEADBAND
MODIFIED
DEADBAND
Fig. 11 — Deadband Multiplier
170
160
150
140
130
SCT (F)
120
110
100
90
80
70
60
50
40
30
-30
-20
-10
10
20
30
40
50
60
70
80
SST (F)
LEGEND
SCT
SST
0
a30-4969
— Saturated Condensing Temperature
— Saturated Suction Temperature
Fig. 12 — Operating Envelope for R-410A Compressor
16
StatusVIEWSTAT) will be 1 (OFF LOCAL) when the
switch is Off and will be 5 (ON LOCAL) when in the Enable
position or Remote Contact position with external contacts
closed.
Two other control methods are available for Machine On/
Off control:
OCCUPANCY
SCHEDULE
(ConfigurationOPT2
CTRL = 1) — The main base board will use the operating
schedules as defined under the Time Clock mode in the scrolling marquee display. These schedules are identical. The schedule number must be set to 1 for local schedule.
The schedule number can be set anywhere from 65 to 99
for operation under a CCN global schedule. The Enable/Off/
Remote Contact must be in the Enable or Remote Contact position. The control mode (Run StatusVIEWSTAT) will be
1 when the switch is Off. The control mode will be 3 when the
Enable/Off/Remote Contact switch input is On and the time of
day is during an unoccupied period. Similarly, the control
mode will be 7 when the time of day is during an occupied
period.
CCN SCHEDULE (ConfigurationOPT2CTRL =
3) — An external CCN device such as Chillervisor System
Manager controls the On/Off state of the machine. This CCN
device forces the variable ‘CHIL_S_S’ between Start/Stop to
control the chiller. The control mode (Run Status
VIEWSTAT) will be 1 when the switch is Off. The control mode will be 3 when the Enable/Off/Remote Contact
switch input is On and the CHIL_S_S variable is ‘Stop.’
Similarly, the control mode will be 6 when the CHIL_S_S variable is ‘Start.’
Table 10 illustrates how the control method and cooling set
point select variables direct the operation of the chiller and the
set point to which it controls. The illustration also shows the
ON/OFF state of the machine for the given combinations.
Ramp Loading
—
Ramp
loading
(ConfigurationSLCTCRMP) limits the rate of change of leaving
fluid temperature. If the unit is in a Cooling mode and configured for Ramp Loading, the control makes 2 comparisons before deciding to change stages of capacity. The control calculates a temperature difference between the control point and
leaving fluid temperature. If the difference is greater than 4° F
(2.2° C) and the rate of change (°F or °C per minute) is more
than the configured Cooling Ramp Loading value (CRMP),
the control does not allow any changes to the current stage of
capacity.
Low Entering Fluid Temperature Unloading — When the
entering fluid temperature is below the control point, the
control will attempt to remove 25% of the current stages being
used. If exactly 25% cannot be removed, the control removes
an amount greater than 25% but no more than necessary. The
lowest stage will not be removed.
Hot Gas Bypass — If equipped, the hot gas bypass valve is
energized only when one compressor is running on the circuit
and capacity is decreasing.
Cooler Freeze Protection — The control will try to prevent
shutting the chiller down on a Cooler Freeze Protection alarm
by removing stages of capacity. If the cooler fluid selected
is Water, the freeze point is 34 F (1.1 C). If the cooler fluid
selected is Brine, the freeze point is the Brine Freeze Point (Set
PointsFRZBR.FZ). This alarm condition (A207) only
references leaving fluid temperature and NOT Brine Freeze
point. If the cooler leaving fluid temperature is less than the
freeze point plus 2.0° F (1.1° C), the control will immediately
remove one stage of capacity. This can be repeated once every
30 seconds.
Low Saturated Suction Protection — The control will try to
prevent shutting a circuit down due to low saturated suction
conditions by removing stages of capacity. The circuit alert
condition (T116) compares saturated suction temperature to the
configured Brine Freeze Point (Set PointsFRZBR.FZ).
The Brine Freeze point is a user-configurable value that must
be left at 34 F (1.1 C) for 100% water systems. A lower value
may be entered for systems with brine solutions, but this value
should be set according to the freeze protection level of the
brine mixture. Failure to properly set this brine freeze point value may permanently damage the brazed plate heat exchanger.
The control will initiate Mode 7 (Circuit A) to indicate a circuit’s capacity is limited and that eventually the circuit may
shut down.
Cooling Set Point Select
SINGLE — Unit operation is based on Cooling Set Point 1
(Set PointsCOOLCSP.1).
DUAL SWITCH — Unit operation is based on Cooling Set
Point 1 (Set PointsCOOLCSP.1) when the Dual Set
Point switch contacts are open and Cooling Set Point 2 (Set
PointsCOOLCSP.2) when they are closed.
DUAL CCN OCCUPIED — Unit operation is based on
Cooling Set Point 1 (Set PointsCOOLCSP.1) during the
Occupied mode and Cooling Set Point 2 (Set
PointsCOOLCSP.2) during the Unoccupied mode as
configured under the local occupancy schedule accessible only
from CCN. Schedule Number in Table SCHEDOVR (see Appendix B) must be configured to 1. If the Schedule Number is
set to 0, the unit will operate in a continuous 24-hr Occupied
mode. Control method must be configured to 0 (switch). See
Table 10.
4 TO 20 mA INPUT — Unit operation is based on an external
4 to 20 mA signal input to the Energy Management Module
(EMM).
Operation of Machine Based on Control
Method and Cooling Set Point Selection Settings — Machine On/Off control is determined by the
configuration of the Control Method
(Configuration
OPT2CTRL) and Cooling Set Point Select
(ConfigurationSLCTCLSP) variables. All units are factory configured with Cooling Set Point Select set to 0 (single
set point). With the control method set to 0, simply switching
the Enable/Off/Remote Contact switch to the Enable or
Remote Contact position (external contacts closed) will put the
chiller in an occupied state. The control mode (Run
Table 10 — Control Methods and Cooling Set Points
CONTROL
TYPE
(CTRL)
0 (switch)
2 (Occupancy)
3 (CCN)
OCCUPANCY
STATE
Occupied
Unoccupied
Occupied
Unoccupied
Occupied
Unoccupied
0
(single)
ON,CSP.1
ON,CSP.1
ON,CSP.1
OFF
ON,CSP.1
ON,CSP.1
COOLING SET POINT SELECT (CLSP)
1
2
(dual, switch)
(dual, occ)
ON*
ON,CSP.1
ON*
ON,CSP.2
ON*
Illegal
OFF
Illegal
ON*
ON,CSP.1
ON*
ON,CSP.2
*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.
†Cooling set point determined from 4 to 20 mA input to energy management module (EMM) to terminals TB6-3,5.
17
3
(4 to 20 mA)
ON†
ON
ON†
OFF
ON†
ON†
1. The Enable-Off-Remote Switch in ENABLE,
(CTRL=0).
2. Enable-Off-Remote Switch in REMOTE with a
Start-Stop remote contact closure (CTRL=0).
3. An Occupied Time Period from an Occupancy Schedule
in combination with items 1 or 2 (CTRL=2).
4. A CCN Start-Stop Command to Start in combination
with items 1 or 2 (CTRL=3).
There are certain alarm conditions and Operating Modes
that will turn the cooler pump relay ON. This sequence will describe the normal operation of the pump control algorithm.
When the unit cycles from an "On" state to an "Off' state,
the cooler pump output will remain energized for the Cooler
Pump Shutdown Delay (ConfigurationOPT1PM.DY).
This is configurable from 0 to 10 minutes. The factory default
is 1 minute. If the pump output was deenergized during the
transition period, the pump output will not be energized.
The Cooler Pump Relay will be energized when the machine is "On." The chilled water pump interlock circuit consists
of a chilled water flow switch and a field-installed chilled water
pump interlock. If the chilled water pump interlock circuit does
not close within five (5) minutes of starting, an A200 - Cooler
Flow/Interlock failed to close at Start-Up alam1 will be generated and chiller will not be allowed to start.
If the chilled water pump interlock or chilled water flow
switch opens for at least three (3) seconds after initially being
closed, an A201 - Cooler Flow 1 Interlock Contacts Opened
During Normal Operation alarm will be generated and the machine will stop.
Cooler Pump Control — The AquaSnap® 30MP machines are configured with the Cooler Pump Control (ConfigurationOPT1CPC) = ON.
The maximum load allowed for the Chilled Water Pump
Starter is 5 VA sealed, 10 VA inrush at 24 volts. The starter coil
is powered from the chiller control system. The starter should
be wired between LVT 24 and TB3-1. If equipped, the field-installed chilled water pump starter auxiliary contacts should be
connected in series with the chilled water flow switch between
LVT 16 and LVT 17.
Ice Mode — When Ice Mode is enabled Cooling Setpoint
Select must be set to Dual Switch, Dual 7 day or Dual CCN
Occupied and the energy management module (EMM) must be
installed. Unit operation is based on Cooling Setpoint 1
(CSP.1) during the Occupied mode, Ice Setpoint (CSP.3) during the Unoccupied mode with the Ice Done contacts open and
Cooling Setpoint 2 (CSP.2) during the Unoccupied mode with
the Ice Done contacts closed. These 3 set points can be utilized
to develop your specific control strategy.
Service Test — Both main power and control circuit
power must be on.
The Service Test function should be used to verify proper
operation of condenser output, compressors, minimum load
valve solenoid (if installed), cooler pump, and remote alarm relay. To use the Service Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Use the display keys to
enter the mode and display TEST. Press ENTER twice so that
OFF flashes. Enter the password if required. Use either arrow
key to change the TEST value to the ON position and press
ENTER . Move the Enable/Off/Remote Contact switch to enable. Press ESCAPE and the
button to enter the OUTS or
COMP sub-mode. ENABLE/OFF/REMOTE switchmust be
ENABLE to operate test.
Condenser Pump/Condenser Fan Output Control — The main base board (MBB) has the capability to
control either a condenser fan output or a condenser pump output depending on the unit configuration.
If the unit is configured for Configuration
UNITTYPE = 2 (air cooled), then the output will be off as
long as capacity is equal to 0 and will be energized 5 seconds
before a compressor is started and remain energized until capacity is 0 again.
If the unit is configured for Configuration
UNITTYPE = 3 (water cooled), then the output will be used
for condenser pump control and additional configuration is required. To enable the condenser pump control use ConfigurationOPT1D.PM.E. The pump can be configured for no
pump control (0), on when occupied (1), and on when capacity is greater than 0 (2).
NOTE: Cooler and condenser (30MPW) water flow must be
established in order to operate compressor in service test.
Test the condenser output, cooler pump, liquid line solenoid
valve (30MPA only), crankcase heater, water valve (accessory), and alarm relay by changing the item values from OFF to
ON. These discrete outputs are then turned off if there is no
keypad activity for 10 minutes. When testing compressors,
lead compressor must be started first. All compressor outputs
can be turned on, but the control will limit the rate by staging
one compressor per minute. Minimum load valve can be tested
with the compressors on or off. The relays under the COMP
mode will stay on for 10 minutes if there is no keypad activity.
Compressors will stay on until they are turned off by the operator. The Service Test mode will remain enabled for as long as
there is one or more compressors running. All safeties are monitored during this test and will turn a compressor, circuit or the
machine off if required. Any other mode or sub-mode can be
accessed, viewed, or changed during the TEST mode. The
STAT item (Run StatusVIEW) will display “0” as long as
the Service mode is enabled. The TEST sub-mode value must
be changed back to OFF before the chiller can be switched to
Enable or Remote contact for normal operation.
Configuring and Operating Dual Chiller Control — The dual chiller routine is available for the control of
two units supplying chilled fluid on a common loop. This
control algorithm is designed for parallel fluid flow arrangement
only. One chiller must be configured as the master chiller, the
other as the slave. An additional leaving fluid temperature
thermistor (Dual Chiller LWT) must be installed as shown in
Fig. 13 and 14 and connected to the master chiller. Refer to Sensors section, page 12, for wiring. The CCN communication bus
must be connected between the two chillers. Connections can be
made to the CCN screw terminals on LVT. Refer to Carrier
Comfort Network® Interface section, page 7, for wiring information. Configuration examples are shown in Tables 11 and 12.
Cooler Pump Sequence of Operation — At anytime the unit is in an ON status, as defined by the one of the
following conditions, the cooler pump relay will be enabled.
18
Table 11 — Dual Chiller Configuration (Master Chiller Example)
SUB-MODE
ITEM
KEYPAD ENTRY
DISPLAY
ITEM EXPANSION
COMMENTS
ENTER
CTRL
CONTROL METHOD
ENTER
0
SWITCH
DEFAULT 0
ESCAPE
OPT2
CCN ADDRESS
DEFAULT 1
CCN BUS NUMBER
DEFAULT 0
DISP
UNIT
OPT1
OPT2
CTRL
CCN
CCNA
ENTER
1
CCNB
CCN
CCNB
ENTER
0
ESCAPE
CCN
PROCEED TO
SUBMODE RESET
RSET
RSET
ENTER
LLEN
LLEN
MSSL
CRST
COOLING RESET TYPE
LLEN
LEAD/LAG CHILLER ENABLE
ENTER
DSBL
SCROLLING STOPS
ENTER
DSBL
VALUE FLASHES
ENBL
SELECT ENBL
ENTER
ENBL
ESCAPE
LLEN
LEAD/LAG CHILLER ENABLE
MSSL
MASTER /SLAVE SELECT
ENTER
MAST
MASTER /SLAVE SELECT
ESCAPE
MSSL
SLVA
SLVA
SLVA
CHANGE ACCEPTED
DEFAULT MAST
SLAVE ADDRESS
ENTER
0
SCROLLING STOPS
ENTER
0
VALUE FLASHES
2
SELECT 2
ENTER
2
ESCAPE
SLVA
SLAVE ADDRESS
LLBL
LLBL
15 ITEMS
CHANGE ACCEPTED
LEAD/LAG BALANCE SELECT
ENTER
0
SCROLLING STOPS
ENTER
0
VALUE FLASHES
2
SELECT 2 - Automatic
19
Table 11 — Dual Chiller Configuration (Master Chiller Example) (cont)
SUB-MODE
RSET
ITEM
KEYPAD ENTRY
DISPLAY
ITEM EXPANSION
COMMENTS
LLBL
ENTER
2
LEAD/LAG BALANCE SELECT
CHANGE ACCEPTED
ESCAPE
LLBL
LLBD
LLBD
LEAD/LAG BALANCE DELTA
ENTER
168
LEAD/LAG BALANCE DELTA
ESCAPE
LLBD
LLDY
LLDY
LLDY
PARA
DEFAULT 168
LAG START DELAY
ENTER
5
SCROLLING STOPS
ENTER
5
VALUE FLASHES
10
SELECT 10
ENTER
10
ESCAPE
LLDY
ESCAPE
RSET
ENTER
YES
LAG START DELAY
CHANGE ACCEPTED
MASTER COMPLETE
NOTES:
1. Master Control Method (CTRL) can be configured as 0-Switch, 2-Occupancy or 3-CCN.
2. Parallel Configuration (PARA) cannot be changed.
The master chiller controls the slave chiller by changing its
Control Mode (Run StatusVIEWSTAT) and its operating setpoint or Control Point (Run StatusVIEWCT.PT).
Refer to Table 11 for dual chiller configuration. In this
example the master chiller will be configured at address 1 and
the slave chiller at address 2. The master and slave chillers
must reside on the same CCN bus (ConfigurationCCN
CCNB) but cannot have the same CCN address (ConfigurationCCNCCNA). Both master and slave chillers must
have Lead/Lag Chiller Enable (ConfigurationRSET
LLEN) configured to ENBL. Master/Slave Select (ConfigurationRSETMSSL) must be configured to MAST for
the master chiller and SLVE for the slave. Also in this example,
the master chiller will be configured to use Lead/Lag Balance
Select (ConfigurationRSETLLBL) and Lead/Lag Balance Delta (ConfigurationRSETLLBD) to even out the
chiller run-times weekly. The Lag Start Delay (ConfigurationRSETLLDY) feature will be set to 10 minutes. This
will prevent the lag chiller from starting until the lead chiller
has been at 100% capacity for the length of the delay time. Parallel configuration (ConfigurationRSETPARA) can
only be configured to YES. The variables LLBL, LLBD and
LLDY are not used by the slave chiller.
Dual chiller start/stop control is determined by configuration of Control Method (ConfigurationOPT2CTRL) of
the Master chiller. The Slave chiller should always be configured for CTRL=0 (Switch). If the chillers are to be controlled
by Remote Contacts, both Master and Slave chillers should be
enabled together. Two separate relays or one relay with
two sets of contacts may control the chillers. The Enable/Off/
Remote Contact switch should be in the Remote Contact
position on both the Master and Slave chillers. The Enable/Off/
Remote Contact switch should be in the Enable position for
CTRL=2 (Occupancy) or CTRL=3 (CCN Control).
Both chillers will stop if the Master chiller Enable/Off/
Remote Contact switch is in the Off position. If the Emergency
Stop switch is turned off or an alarm is generated on the Master
chiller the Slave chiller will operate in a Stand-Alone mode.
If the Emergency Stop switch is turned off or an alarm is
generated on the Slave chiller the Master chiller will operate in
a Stand-Alone mode.
MASTER
CHILLER
RETURN
FLUID
SLAVE
CHILLER
THERMISTOR
WIRING*
LEAVING
FLUID
INSTALL DUAL CHILLER LWT
LEAVING FLUID TEMPERATURE
THERMISTOR (T10) HERE
*Depending on piping sizes, use either:
• HH79NZ014 sensor/10HB50106801 well (3-in. sensor/well)
• HH79NZ029 sensor/10HB50106802 well (4-in. sensor/well)
Fig. 13 — Dual Chiller Thermistor Location
DIMENSIONS in. (mm)
A
B
3.10 (78.7)
1.55 (39.4)
4.10 (104.1)
1.28 (32.5)
PART
NUMBER
10HB50106801
10HB50106802
A
0.505/0.495
0.61
DIA
B
1/4 N.P.T.
6” MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
Fig. 14 — Dual Leaving Water Thermistor Well
20
Table 12 — Dual Chiller Configuration (Slave Chiller Example)
SUB-MODE
ITEM
KEYPAD ENTRY
DISPLAY
ITEM EXPANSION
COMMENTS
ENTER
CTRL
CONTROL METHOD
0
SWITCH
DEFAULT 0
CCN ADDRESS
SCROLLING STOPS
DISP
UNIT
OPT1
OPT2
CTRL
ESCAPE
OPT2
CCN
CCNA
CCNA
ENTER
1
ENTER
1
VALUE FLASHES
2
SELECT 2
(SEE NOTE 2)
CCN
CCNA
CCNB
ENTER
2
ESCAPE
CCN
ENTER
0
ESCAPE
CCN
CCN ADDRESS
CHANGE ACCEPTED
CCN BUS NUMBER
DEFAULT 0
(SEE NOTE 3)
PROCEED TO
SUBMODE RSET
RSET
RSET
ENTER
LLEN
LLEN
CRST
COOLING RESET TYPE
LLEN
LEAD/LAG CHILLER ENABLE
ENTER
DSBL
SCROLLING STOPS
ENTER
DSBL
VALUE FLASHES
ENBL
SELECT ENBL
ENTER
ENBL
ESCAPE
LLEN
LEAD/LAG CHILLER ENABLE
MSSL
MSSL
MSSL
15 ITEMS
CHANGE ACCEPTED
MASTER /SLAVE SELECT
ENTER
MAST
SCROLLING STOPS
ENTER
MAST
VALUE FLASHES
SLVE
SELECT SLVE
ENTER
SLVE
ESCAPE
MSSL
ESCAPE
RSET
MASTER /SLAVE SELECT
CHANGE ACCEPTED
SLAVE COMPLETE
NOTES:
1. Slave Control Method (CTRL) must be configured for 0.
2. Slave CCN Address (CCNA) must be different than Master.
3. Slave CCN Bus Number (CCNB) must be the same as Master
4. Slave does not require SLVA, LLBL, LLBD, or LLDY to be configured.
21
(29.4 C) outdoor-air temperature and 15.0 F (8.3 C) reset at
55.0 F (12.8 C) outdoor-air temperature. The space temperature reset example provides 0° F (0° C) chilled water set point
reset at 72.0 F (22.2 C) space temperature and 6.0 F (3.3 C) reset at 68.0 F (20.0 C) space temperature. The variable CRST
should be configured for the type of reset desired. The variable
RM.NO should be set to the temperature that no reset should
occur. The variable RM.F should be set to the temperature that
maximum reset is to occur. The variable RM.DG should be set
to the maximum amount of reset desired. Figures 15 and 16 are
examples of outdoor air and space temperature resets.
To use return reset, four variables must be configured. In the
Configuration mode under the sub-mode RSET, items CRST,
RT.NO, RT.F and RT.DG must be properly set. See Table 16
— Configuring Return Temperature Reset. This example provides 5.0 F (2.8 C) chilled water set point reset at 2.0 F (1.1 C)
cooler T and 0° F (0° C) reset at 10.0 F (5.6 C) cooler T. The
variable RT.NO should be set to the cooler temperature difference (T) where no chilled water temperature reset should occur. The variable RT.F should be set to the cooler temperature
difference where the maximum chilled water temperature reset
should occur. The variable RM.DG should be set to the maximum amount of reset desired.
To verify that reset is functioning correctly proceed to Run
Status mode, sub-mode VIEW, and subtract the Active Setpoint (Run StatusVIEWSETP) from the Control Point
(Run StatusVIEWCTPT) to determine the degrees reset.
Temperature Reset — The control system is capable of
handling leaving-fluid temperature reset based on return cooler
fluid temperature. Because the change in temperature through
the cooler is a measure of the building load, the return temperature reset is in effect an average building load reset method.
The control system is also capable of temperature reset based
on outdoor-air temperature (OAT), space temperature (SPT), or
from an externally powered 4 to 20 mA signal. Accessory sensors must be used for SPT reset (33ZCT55SPT) and for OAT
reset (HH79NZ014). The energy management module (EMM)
must be used for temperature reset using a 4 to 20 mA signal.
See Tables 13 and 14.
IMPORTANT: Care should be taken when interfacing with
other control systems due to possible power supply differences: full wave bridge versus half wave rectification. Connection of control devices with different power supplies
may result in permanent damage. ComfortLink controls
incorporate power supplies with half wave rectification. A
signal isolation device should be utilized if the signal generator incorporates a full wave bridge rectifier.
To use outdoor air or space temperature reset, four variables
must be configured. In the Configuration mode under the submode RSET, items (ConfigurationRSETCRST),
(ConfigurationRSETRM.NO),
(Configuration
RSETRM.F), and (ConfigurationRSETRT.DG)
must be properly set. See Table 15 — Configuring Outdoor Air
and Space Temperature Reset. The outdoor air reset example
provides 0° F (0° C) chilled water set point reset at 85.0 F
Table 13 — Menu Configuration of 4 to 20 mA Cooling Set Point Control
MODE
(RED LED)
KEYPAD SUB-MODE KEYPAD
ENTRY
ENTRY
ITEM
DISPLAY
ITEM
EXPANSION
CLSP
0
COOLING SETPOINT SELECT
COMMENT
DISP
ENTER
UNIT
OPT1
OPT2
CCN
CONFIGURATION
RSET
SLCT
ENTER
ENTER
0
Scrolling Stops
ENTER
0
Flashing ‘0’
3
Select ‘3’
3
Change Accepted
ENTER
Table 14 — 4 to 20 mA Reset
SUB-MODE
KEYPAD
ENTRY
DISPLAY
ITEM
EXPANSION
CRST
1
COOLING RESET
TYPE
MA.DG
5.0 F
(2.8 C)
DEGREES COOL
RESET
ITEM
RSET
ENTER
NOTE: The example above shows how to configure the chiller for
4 to 20 mA reset. No reset will occur at 4.0 mA input, and a 5.0 F
reset will occur at 20.0 mA. An EMM (energy management module)
is required.
22
COMMENT
0 = no reset
1 = 4 to 20 mA input
2 = Outdoor air temp
3 = Return Fluid
4 = Space Temperature
Default: 0° F (0° C) Reset at 20 mA
Range: –30 to 30 F (–16.7 to 16.7 C)
Table 15 — Configuring Outdoor Air and Space Temperature Reset
MODE
(RED LED)
KEYPAD
ENTRY
SUBMODE
ENTER
DISP
KEYPAD
ENTRY
DISPLAY
ITEM
Outdoor
Air
Space
ITEM
EXPANSION
COMMENT
CRST
2
4
COOLING RESET
TYPE
2 = Outdoor-Air Temperature
(Connect to LVT-4,5)
4 = Space Temperature
(Connect to LVT-3,4)
RM.NO*
85 °F
72 °F
REMOTE - NO
RESET TEMP
Default: 125.0 F (51.7 C)
Range: 0° to125 F
(–17.8 to 51.7 C)
RM.F
55 °F
68 °F
REMOTE - FULL
RESET TEMP
Default: 0.0° F (-17.7 C)
Range: 0° to 125 F
(–17.8 to 51.7 C)
RM.DG
15 F
6 F
REMOTE - DEGREES
RESET
Default: 0° F (0° C)
Range: –30 to 30 F
(–16.7 to -16.7 C)
UNIT
OPT1
OPT2
CCN
ENTER
CONFIGURATION
RSET
*1 item skipped in this example.
Table 16 — Configuring Return Temperature Reset
MODE
(RED LED)
KEYPAD
KEYPAD
SUB-MODE
ENTRY
ENTRY
ITEM
DISPLAY
ITEM
EXPANSION
DISP
ENTER
TEST
ON/OFF
TEST DISPLAY LEDs
UNIT
ENTER
TYPE
X
UNIT TYPE
OPT1
ENTER
FLUD
X
COOLER FLUID
OPT2
ENTER
CTRL
X
CONTROL METHOD
ENTER
COMMENT
CCN
ENTER
CONFIGURATION
RSET
0 = No Reset
1 = 4 to 20 mA Input (EMM required)
(Connect to EMM TB6-2,3)
COOLING RESET TYPE 2 = Outdoor-Air Temperature
3 = Return Fluid
4 = Space Temperature
(Connect to TB5-5,6)
CRST
3
RT.NO*
10.0 F
RETURN FLUID - NO
RESET TEMP
Default: 10.0 F (5.6 C)
Range: 0° to 30 F COOLER DT
(0.0 to 16.7 C)
RT.F
2.0 F
RETURN FLUID - FULL
RESET TEMP
Default: 0 F (–17.8 C)
Range: 0° to 30 F COOLER DT
(0.0 to 16.7 C)
RT.DG
5.0 F
RETURN - DEGREES
RESET
Default: 0 F (0 C)
Range: –30 to 30°F (–16.7 to 16.7 C)
*1 item skipped in this example.
Under normal operation, the chiller will maintain a constant
leaving fluid temperature approximately equal to the chilled
fluid set point. As the cooler load varies, the entering cooler
fluid will change in proportion to the load as shown in Fig. 17.
Usually the chiller size and leaving-fluid temperature set point
are selected based on a full-load condition. At part load, the fluid temperature set point may be colder than required. If the
leaving fluid temperature was allowed to increase at part load,
the efficiency of the machine would increase.
Return temperature reset allows for the leaving temperature
set point to be reset upward as a function of the return fluid
temperature or, in effect, the building load.
Demand Limit — Demand limit is a feature that allows
the unit capacity to be limited during periods of peak energy usage. There are 3 types of demand limiting that can be configured. The first type is through 2-stage switch control, which will
reduce the maximum capacity to 2 user-configurable percentages. The second type is by 4 to 20 mA signal input which will reduce the maximum capacity linearly between 100% at a 4 mA
input signal (no reduction) down to the user-configurable level
at a 20 mA input signal. The third type uses the CCN Loadshed
module and has the ability to limit the current operating capacity to maximum and further reduce the capacity if required.
NOTE: The 2-stage switch control and 4 to 20-mA input signal types of demand limiting require the energy management
module (EMM).
23
To use demand limit, select the type of demand limiting to
use. Then configure the demand limit set points based on the
type selected.
configure the 2 Demand Limit Switch points (ConfigurationRSETDLS1) and (ConfigurationRSETDLS2)
to the desired capacity limit. See Table 17. Capacity steps are
controlled by 2 relay switch inputs field wired to LVT as shown
in Fig. 5.
For demand limit by 2-stage switch control, closing the first
stage demand limit contact will put the unit on the first demand
limit level. The unit will not exceed the percentage of capacity
entered as Demand Limit Switch 1 set point (DLS1). Closing
contacts on the second demand limit switch prevents the unit
from exceeding the capacity entered as Demand Limit Switch
2 set point. The demand limit stage that is set to the lowest demand takes priority if both demand limit inputs are closed. If
the demand limit percentage does not match unit staging, the
unit will limit capacity to the closest capacity stage.
To disable demand limit configure DMDC to 0. See
Table 17.
EXTERNALLY POWERED DEMAND LIMIT (4 to
20 mA Controlled) — To configure demand limit for 4 to 20
mA control set the Demand Limit Select (ConfigurationRSETDMDC) to 2. Then configure the Demand
Limit at 20 mA (ConfigurationRSETDM20) to the
maximum loadshed value desired. Connect the output from an
externally powered 4 to 20 mA signal to terminal block LVT,
terminals 7 and 8 (+,–). Refer to the unit wiring diagram for
these connections to the optional/accessory energy management module and terminal block. The control will reduce allowable capacity to this level for the 20 mA signal. See
Table 17 and Fig. 18.
LEGEND
LWT — Leaving Water (Fluid) Temperature
Fig. 15 — Outdoor-Air Temperature Reset
CAUTION
Care should be taken when interfacing with other manufacturer’s control systems, due to possible power supply
differences, full wave bridge versus half wave rectification.
The two different power supplies cannot be mixed.
ComfortLink controls use half wave rectification. A signal
isolation device should be utilized if a full wave bridge
signal generating device is used.
DEMAND LIMIT (CCN Loadshed Controlled) — To configure Demand Limit for CCN Loadshed control set the Demand Limit Select (ConfigurationRSETDMDC) to 3.
Then configure the Loadshed Group Number (ConfigurationRSETSHNM), Loadshed Demand Delta (ConfigurationRSETSHDL), and Maximum Loadshed Time
(ConfigurationRSETSHTM). See Table 17.
The Loadshed Group number is established by the CCN
system designer. The ComfortLink controls will respond to a
Redline command from the Loadshed control. When the
Redline command is received, the current stage of capacity is
set to the maximum stages available. Should the loadshed control send a Loadshed command, the ComfortLink controls will
reduce the current stages by the value entered for Loadshed
Demand delta. The Maximum Loadshed Time is the maximum
length of time that a loadshed condition is allowed to exist. The
control will disable the Redline/Loadshed command if no
Cancel command has been received within the configured
maximum loadshed time limit.
LEGEND
LWT — Leaving Water (Fluid) Temperature
LWT
LWT
Fig. 16 — Space Temperature Reset
EWT
LWT
LEGEND
— Entering Water (Fluid) Temperature
— Leaving Water (Fluid) Temperature
Cooling Set Point (4 to 20 mA) — A field supplied
and generated, externally powered 4 to 20 mA signal can be
used to provide the leaving fluid temperature set point. Connect
the signal to LVT-10,8 (+,–). See Table 17 for instructions to
enable the function. Figure 19 shows how the 4 to 20 mA signal is linearly calculated on an overall 10 F to 80 F range for
fluid types (ConfigurationOPT1FLUD) 1 or 2. The set
point will be limited by the fluid (FLUD) type. Be sure that the
chilled water loop is protected at the lowest temperature.
Fig. 17 — Standard Chilled Fluid
Temperature Control — No Reset
DEMAND LIMIT (2-Stage Switch Controlled) — To configure demand limit for 2-stage switch control set the Demand
Limit Select (ConfigurationRSETDMDC) to 1. Then
24
MAX. ALLOWABLE LOAD (%)
100
50% CAPACITY AT 20 mA
80
60
40 100% CAPACITY AT 4 mA
75% CAPACITY AT 12 mA
20
0
0
2
6
4
12
8
10
14
DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT
16
18
20
Fig. 18 — 4 to 20-mA Demand Limiting
100
(38)
90
(32)
80
(27)
SET POINT, F (C)
70
(21)
MAXIMUM
SET POINT
70 F (21.1 C)
60
(15)
50
(10)
40
(4.4)
(FLUD = 1) MINIMUM
SET POINT 38 F (3.3 C)
30
(-1)
20
(-7)
(FLUD = 2) MINIMUM
SET POINT 14 F (-10 C)
10
(-12)
0
(-17) 0
2
4
6
8
10
12
14
4 TO 20 mA SIGNAL TO EMM
EMM — Energy Management Module
Fig. 19 — Cooling Set Point (4 to 20 mA)
25
16
18
20
Table 17 — Configuring Demand Limit
MODE
CONFIGURATION
KEYPAD
ENTRY
SUB-MODE
KEYPAD
ENTRY
ITEM
DISPLAY
ITEM EXPANSION
ENTER
DISP
ENTER
TEST
ON/OFF
Test Display LEDs
UNIT
ENTER
TYPE
X
Unit Type
OPT1
ENTER
FLUD
X
Cooler Fluid
OPT2
ENTER
CTRL
X
Control Method
CCN
ENTER
CCNA
X
CCN Address
RSET
ENTER
CRST
X
Cooling Reset Type
COMMENT
Default: 0
0 = None
1 = Switch
2 = 4 to 20 mA Input
3 = CCN Loadshed
DMDC*
X
Demand Limit Select
DM20
XXX %
Demand Limit at 20 mA
Default: 100%
Range: 0 to 100
SHNM
XXX
Loadshed Group
Number
Default: 0
Range: 0 to 99
SHDL
XXX%
Loadshed Demand
Delta
Default: 0%
Range: 0 to 60%
SHTM
XXX MIN
Maximum Loadshed
Time
Default: 60 min.
Range: 0 to 120 min.
DLS1
XXX %
Demand Limit
Switch 1
Default: 80%
Range: 0 to 100%
DLS2
XXX %
Demand Limit
Switch 2
Default: 50%
Range: 0 to 100%
*Seven items skipped in this example.
015,020,030) or 7 seconds (sizes 040,045), which indicates the
maximum unloading for the digital compressor is 47%. This is
done to optimize efficiency of the system.
Digital Scroll Option — The 30MP015-045 units have
a factory-installed option for a digital scroll compressor which
provides additional stages of unloading for the unit. The digital
compressor is always installed in the A1 compressor location.
When a digital compressor is installed, a digital unloader solenoid (DUS) is used on the digital compressor.
DIGITAL SCROLL OPERATION — A digital scroll operates in two stages — the "loaded state" when the solenoid valve
is deenergized and the "unloaded state" when the solenoid
valve is energized. During the loaded state, the compressor operates like a standard scroll and delivers full capacity and mass
flow.
However, during the unloaded state, there is no capacity
and no mass flow through the compressor. The capacity of the
system is varied by varying the time the compressor operates
in an unloaded and loaded state during a 15-second period. If
the DUS is energized for 7 seconds, the compressor will be
operating at 47% capacity. If the DUS is energized for 10 seconds, the compressor will be operating at approximately 33%
of its capacity. Capacity is the time averaged summation of
loaded and unloaded states, and its range is continuous from
the minimum configured capacity to 100%. Regardless of
capacity, the compressor always rotates with constant speed.
As the compressor transitions from a loaded to unloaded state,
the discharge and suction pressures will fluctuate and the compressor sound will change.
The ComfortLink controller controls and integrates the operation of the DUS into the compressor staging routine to
maintain temperature control. When a digital compressor is installed, an additional discharge gas temperature thermistor
(DTT) is installed along with the AUX board for control of the
DUS.
DIGITAL COMPRESSOR CONFIGURATION — When a
digital compressor is installed, the configuration parameter
(ConfigurationUNITA1.TY) is configured to YES.
There is also a maximum unload time configuration, (ConfigurationUNITMAX.T) that is set to 10 seconds (sizes
PRE-START-UP
IMPORTANT: Before beginning Pre-Start-Up or Start-Up,
complete Start-Up Checklist for 30MP Liquid Chiller at
end of this publication (pages CL-1 to CL-7). The checklist
assures proper start-up of a unit, and provides a record of
unit condition, application requirements, system information, and operation at initial start-up.
Do not attempt to start the chiller until following checks
have been completed.
System Check
1. Check all auxiliary components, such as chilled fluid
pumps, air-handling equipment, condenser pump or other
equipment to which the chiller supplies liquid. Consult
manufacturer's instructions. Verify that any pump interlock contacts have been properly installed. If the unit has
field-installed accessories, be sure all are properly installed and wired correctly. Refer to unit wiring diagrams.
2. Use the scrolling marquee display to adjust the Cooling
Set Point.
3. Fill chilled fluid circuit with clean water (with recommended inhibitor added) or other non-corrosive fluid to
be cooled. Bleed all air out of the high points of the system. If chilled water is to be maintained at a temperature
below 40 F (4.4 C), a brine of sufficient concentration
must be used to prevent freeze-up at anticipated suction
temperatures. To ensure sufficient loop volume, see
Tables 18 and 19.
4. Check tightness of all electrical connections.
NOTE: On units with digital scroll option do not check
refrigerant; charge if compressor is operating at less than
26
5.
6.
7.
8.
5. Allow unit to operate and confirm that everything is functioning properly. Check to see that leaving fluid temperature agrees with leaving set point (Set PointsCOOL
CSP.1) or (Set PointsCOOLCSP.2), or if reset is
used, with the control point (Run StatusVIEW
CTPT).
6. Check the cooler leaving chilled water temperature to see
that it remains well above 32 F (0° C), or the brine freezing point if the unit is a medium temperature brine unit.
7. Recheck compressor oil level (see Oil Charge section).
100% capacity; digital operation can be disabled by configuring A1.TY = NO (ConfigurationUnitA1.TY).
Oil should be visible in the compressor sight glass(es).
See Fig. 20. An acceptable oil level in the compressors is
from 1/8 to 3/8 of sight glass when the compressors are off.
Adjust the oil level as required. See Oil Charge section on
page 30 for Carrier approved oils.
Crankcase heaters must be firmly attached to compressors, and must be on for 24 hours prior to start-up
(30MPA units only).
Electrical power source must agree with unit nameplate.
Check rotation of scroll compressors. Monitor control
alarms during first compressor start-up for reverse rotation protection alarm.
Check Refrigerant Charge — All 30MPW units are
shipped with a complete operating charge of R-410A and
should be under sufficient pressure to conduct a leak test after
installation. If there is no system pressure, admit nitrogen until
a pressure is observed and then proceed to test for leaks. After
leaks are repaired, the system must be dehydrated.
All refrigerant charging should be done through the ¼-in.
Schrader connection on the liquid line. Do NOT add refrigerant
charge through the low-pressure side of the system. If complete
charging is required, weigh in the appropriate charge for the
circuit as shown on the unit nameplate. If partial charging is required, operate circuit at full load and add charge until the sight
glass is clear of bubbles.
START-UP AND OPERATION
CAUTION
Crankcase heaters on 30MPA units are wired into the control circuit, so they are always operable as long as the main
power supply disconnect is on (closed), even if any safety
device is open. Compressor heaters must be on for 24
hours prior to the start-up of any compressor. Equipment
damage could result if heaters are not energized for at least
24 hours prior to compressor start-up.
a30-4978
Compressor crankcase heaters must be on for 24 hours before start-up. To energize the crankcase heaters, close the field
disconnect. Leave the compressor circuit breakers off/open.
The crankcase heaters are now energized.
NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-7.
Actual Start-Up — Actual start-up should be done only
under supervision of a qualified refrigeration mechanic.
1. Be sure all service valves are open (30MPA units only).
2. Using the scrolling marquee display, set leaving-fluid set
point (Set PointsCOOLCSP.1). No cooling range
adjustment is necessary.
3. Start chilled fluid pump (if not configured for cooler
pump control).
4. Turn ENABLE/OFF/REMOTE CONTACT switch to
ENABLE position.
OIL SIGHTGLASS
Fig. 20 — Sight Glass Location
Table 18 — Minimum Flow Rates and Minimum Loop Volume — English
FLOW RATE
UNIT SIZE
EVAPORATOR
CONDENSER
30MP015
30MP020
30MP030
30MP040
30MP045
Gal./Min
22
28
43
55
64
Gal./Min
22
28
43
55
64
NORMAL AIR CONDITIONING APPLICATION
Gal./Ton
Std Unit
12
6
6
3
3
HGBP
N/A
4
4
3
3
Digital
3
3
3
3
3
PROCESS COOLING OR LOW AMBIENT
OPERATION APPLICATION
Gal./Ton
Std Unit
HGBP
Digital
12
N/A
6
10
10
6
10
10
6
6
6
6
6
6
6
Table 19 — Minimum Flow Rates and Minimum Loop Volume — SI
FLOW RATE
UNIT SIZE
EVAPORATOR
CONDENSER
30MP015
30MP020
30MP030
30MP040
30MP045
L/s
1.4
1.8
2.7
3.5
4.0
L/s
1.4
1.8
2.7
3.5
4.0
HGBP —
NORMAL AIR CONDITIONING APPLICATION
L per kW
Std Unit
13.0
6.5
6.5
3.3
3.3
HGBP
N/A
4.3
4.3
3.3
3.3
LEGEND
Hot Gas Bypass
27
Digital
3.3
3.3
3.3
3.3
3.3
PROCESS COOLING OR LOW AMBIENT
OPERATION APPLICATION
L per kW
Std Unit
HGBP
Digital
13.0
N/A
6.5
10.8
10.8
6.5
10.8
10.8
6.5
6.5
6.5
6.5
6.5
6.5
6.5
2. Connect a refrigerant cylinder loosely to the high flow
Schrader valve connection on the liquid line. Purge the
charging hose and tighten the connections.
3. Open the refrigerant cylinder valve.
4. If the system has been dehydrated and is under vacuum,
break the vacuum with refrigerant gas. For R-410A, build
up system pressure to 101 psig and 32 F (697 kPa and
0° C). Invert the refrigerant cylinder so that the liquid refrigerant will be charged.
5. a. For complete charge of 30MPW units, follow
charging by weight procedure. When charge is
nearly full, complete the process by observing the
sight glass for clear liquid flow while the unit is
operating. The use of sight glass charging is valid
only when unit is operating at full capacity.
b. For complete charge of 30MPA units or where
refrigerant cylinder cannot be weighed, follow the
condenser manufacturer’s charging procedure or
follow charging by sight glass procedure. The use
of sight glass charging is valid only when unit is
operating at full capacity.
6. a. The 30MPA condenserless units are shipped
with a nitrogen holding charge. After installation
with the field-supplied system high side, the complete system should be evacuated and charged per
the condenser manufacturer’s charging procedure
or charged until the sight glass is clear (with the
unit running at full capacity). To achieve maximum system capacity, add additional charge equal
to the difference between the condenser optimal
charge and the condenser minimum charge, which
can be obtained from the charge data provided in
the condenser installation instructions.
b. To ensure maximum performance of 30MPW
units, raise the compressor saturated discharge
temperature (SDT) to approximately 100 F
(37.8 C) by throttling the condenser water intake.
Add charge until there is approximately 9 to 12° F
(5.0 to 6.6° C) of system subcooling (SDT minus
actual temperature entering the thermostatic
expansion valve).
CAUTION
Never charge liquid into low-pressure side of system. Do
not overcharge. Overcharging results in higher discharge
pressure, possible compressor damage, and higher power
consumption. During charging or removal of refrigerant, be
sure water is continuously circulating through the cooler to
prevent freezing.
The 30MPA units (condenserless) are shipped with a nitrogen holding charge only. After chiller assembly is completed in
the field, system must be fully charged. While the unit is running at full capacity, add refrigerant until the sight glass is clear.
R-410A is the required refrigerant.
Do not open the liquid valve until there is a charge in remainder of system. A positive pressure indicates a charge in
system. With the unit operating at full load, check liquid line
sight glass to be sure the unit is fully charged (bubbles in the
sight glass indicate the unit is not fully charged).
If there is no refrigerant vapor pressure in the system, the
entire system must be leak tested. After repairing leaks, evacuate the system before recharging.
Follow approved evacuation procedures when removing
refrigeration. Release remaining pressure to an approved evacuated cylinder.
The liquid charging method is recommended for complete
charging or when additional charge is required.
CAUTION
Be careful not to overcharge the system. Overcharging
results in higher discharge pressure, possible compressor
damage, and higher power consumption.
EVACUATION AND DEHYDRATION — Because the
30MP systems use polyol ester (POE) oil, which can absorb
moisture, it is important to minimize the amount of time that
the system interior is left exposed to the atmosphere. Minimizing the exposure time of the oil to the atmosphere will minimize the amount of moisture that needs to be removed during
evacuation.
Once all of the piping connections are complete, leak test
the unit and then pull a deep dehydration vacuum. Connect the
vacuum pump to the high flow Schraeder valve in the suction
line and liquid line. For best results, it is recommended that a
vacuum of at least 500 microns (0.5 mm Hg) be obtained. Afterwards, to ensure that no moisture is present in the system,
perform a standing vacuum-rise test.
With the unit in deep vacuum (500 microns or less), isolate
the vacuum pump from the system. Observe the rate-of-rise of
the vacuum in the system. If the vacuum rises by more than
50 microns in a 30-minute time period, then continue the dehydration process. Maintain a vacuum on the system until the
standing vacuum requirement is met. This will ensure a dry
system.
By following these evacuation and dehydration procedures,
the amount of moisture present in the system will be minimized. It is required that liquid line filter driers be installed
between the condenser(s) and the expansion devices to capture
any foreign debris and provide additional moisture removal
capacity.
LIQUID CHARGING METHOD — Add charge to the unit
through the liquid line service valve. Never charge liquid into
the low-pressure side of the system.
1. Close liquid line ball valve (30MPA only).
Operating Limitations
TEMPERATURES (See Table 20 for 30MP standard temperature limits).
CAUTION
Do not operate with cooler leaving chiller water (fluid)
temperature (LCWT) below 32 F (0° C) for standard units
with proper brine solution or 40 F (4.4 C) for the standard
units with fresh water, or below 15 F (–9.4 C) for units factory built for medium temperature brine or unit damage
may occur.
High Cooler Leaving Chilled Water (Fluid) Temperatures
(LCWT) — During start-up with cooler the LCWT should not
be above approximately 60 F (16 C).
Low Cooler LCWT — For standard units with fresh water,
the LCWT must be no lower than 40 F (4.4 C). For standard
units with a proper brine solution, the LCWT must be no lower
than 32 F (0° C). If the unit is the factory-installed optional
medium temperature brine unit, the cooler LCWT can go
down to 15 F (–9.4 C).
28
Control Circuit Power — Power for the control circuit is
supplied from the main incoming power through a factoryinstalled control power transformer (TRAN1) for all models.
Field wiring connections are made to the LVT.
Table 20 — Temperature Limits for
Standard 30MP Units
TEMPERATURE LIMIT
F
140
65
95
70
40
Maximum Condenser LWT
Minimum Condenser EWT
Maximum Cooler EWT*
Maximum Cooler LWT
Minimum Cooler LWT†
C
60
18
35
21
4
OPERATION SEQUENCE
The unit is started by putting the ENABLE/OFF/REMOTE
CONTACT switch in the ENABLE or REMOTE CONTACT
position. When the unit receives a call for cooling (either from
the internal control or CCN network command or remote contact closure), the unit stages up in capacity to maintain the leaving fluid set point. The first compressor starts 11/2 to 3 minutes
after the call for cooling.
For all units, if temperature reset is being used, the unit controls to a higher leaving-fluid temperature as the building load
reduces. If demand limit is used, the unit may temporarily be
unable to maintain the desired leaving-fluid temperature because of imposed power limitations.
LEGEND
EWT — Entering Fluid (Water) Temperature
LWT — Leaving Fluid (Water) Temperature
*For sustained operation, EWT should not exceed 85 F (29.4 C).
†Unit requires modification below this temperature.
IMPORTANT: Medium temperature brine duty application
(below 32 F [0° C] LCWT) for chiller normally requires
factory modification. Contact your Carrier representative
for applicable LCWT range for standard water-cooled
chiller in a specific application.
SERVICE
WARNING
VOLTAGE — ALL UNITS
Main Power Supply — Minimum and maximum acceptable
supply voltages are listed in the Installation Instructions.
Unbalanced 3-Phase Supply Voltage — Never operate a motor
where a phase imbalance between phases is greater than 2%.
To determine percent voltage imbalance:
max voltage deviation
from avg voltage
% Voltage Imbalance = 100 x
average voltage
The maximum voltage deviation is the largest difference
between a voltage measurement across 2 legs and the average
across all 3 legs.
Example: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during service. There may
be more than one disconnect switch. Tag all disconnect
locations to alert others not to restore power until work is
completed.
Electronic Components
CONTROL COMPONENTS — Unit uses an advanced electronic control system that normally does not require service.
For details on controls refer to Controls section.
Access to the controls is through a hinged panel. Inner panels are secured in place and should not be removed unless all
power to the chiller is off.
Compressor Replacement — All models contain
scroll compressors and have two or three compressors. A compressor is most easily removed from the side of the unit or
above, depending on where clearance space was allowed during unit installation. See Fig. 21.
Remove the junction box cover bolts and disconnect the
compressor power and crankcase heater connections (30MPA
only). Remove the cable from the compressor junction box.
Remove the connections from the high-pressure switch. Remove the crankcase heater. Knock the same holes out of the
new compressor junction box and install the cable connectors
from the old compressor.
The compressors are bolted to rails, which are in turn bolted
to the unit basepan for all sizes. Remove the 4 bolts holding the
compressor to the rail on the basepan. Save the mounting hardware for use with the new compressor. Carefully cut the compressor suction and discharge lines with a tubing cutter as close
to the compressor as feasible. Remove high-pressure switch
and pressure transducer(s) if required for compressor removal.
Lift one corner of the compressor at a time and remove all the
steel spacers. Remove the old compressor from the unit.
Slide the new compressor in place on the rails. Lifting one
side of the compressor at a time, replace all of the compressor
mounting hardware. Using new tubing as required, reconnect
compressor suction and discharge lines. Using hardware saved,
reinstall the mounting bolts and washers through the compressor feet. Using proper techniques, braze suction and discharge
lines and check for leaks. Reconnect oil equalization line.
Re-install the crankcase heater (30MPA units). Reconnect
the compressor power connections and high-pressure switch
wiring as on the old compressor. Refer to Fig. 21. Following
1. Determine average voltage:
Average voltage =
=
243 + 236 + 238
3
717
3
= 239
2. Determine maximum deviation from average voltage:
(AB) 243 – 239 = 4 v
(BC) 239 – 236 = 3 v
(AC) 239 – 238 = 1 v
Maximum deviation is 4 v.
3. Determine percent voltage imbalance:
% Voltage Imbalance = 100 x
4
239
= 1.7%
This voltage imbalance is satisfactory as it is below the
maximum allowable of 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately. Do not operate unit until imbalance condition
is corrected.
29
the installation of the new compressor, tighten all hardware to
the following specifications. (See Table 21.)
Oil Charge
CAUTION
Table 21 — Unit Torque Specification
FASTENER
Compressor Mounting
Bolts
Compressor Power
Connections
Compressor Ground
Terminal Connections
The compressor in a Puron® refigerant (R-410A) system
uses a polyol ester (POE) oil. This is extremely hygroscopic, meaning it absorbs water readily. POE oils can
absorb 15 times as much water as other oils designed for
HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere. Failure
to do so could result in possible equipment damage.
RECOMMENDED TORQUE
7 to 10 ft-lb (9.5 to 13.5 N-m)
24 to 28 in.-lb (2.7- to 3.2 N-m)
14 to 18 in.-lb (1.6 to 2.0 N-m)
30MPW Condenser and 30MP Cooler
Puron refrigerant systems use a polyol ester (POE) oil. Use
only Carrier approved compressor oil. Oil should be visible in
compressor oil sight glass. An acceptable oil level is from 1/8 to
3/ of sight glass. All compressors must be off when checking
8
oil level. Recommended oil level adjustment method is as
follows:
ADD OIL — Additional oil may be required in 30MPA units.
Tables 22 and 23 provide an estimate of the amount of oil required, based on the line length and the recommended pipe sizes. The actual circuit oil charge will depend on the application
piping. The guidelines listed are estimates and will likely need
adjusting depending on the number of traps in the application
and the pipe sizes utilized.
No attempt should be made to increase the oil level in the
sight-glass above the 3/4 full level. A high oil level is not sustainable in the compressor and the extra oil will be pumped out
into the system causing a reduction in system efficiency and a
higher-than-normal oil circulation rate.
Add oil to suction line Schrader valve on tandem compressors sets and the compressor Schrader on the trios. When oil
can be seen at the bottom of the sight glass, add oil in 5 oz increments which is approximately 1/8 in oil level. Run all compressors for 20 minutes then shut off to check oil level. Repeat
procedure until acceptable oil level is present.
NOTE: Use only Carrier approved compressor oil. Approved
sources are:
Totaline . . . . . . . . . . . . . . . . . . . . . . 3MAF POE, P903-1601
Mobil . . . . . . . . . . . . . . . . . . . . . . . . . . .EAL Arctic 32-3MA
Uniqema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RL32-3MAF
Do not reuse oil that has been drained out, or oil that has
been exposed to atmosphere.
BRAZED-PLATE COOLER AND CONDENSER HEAT
EXCHANGER REPLACEMENT — Brazed-plate heat exchangers cannot be repaired if they develop a leak. If a leak
(refrigerant or water) develops, the heat exchanger must be
replaced. To replace a brazed plate heat exchanger:
1. Disconnect the liquid-in and liquid-out connections at the
heat exchanger.
2. Check that the replacement heat exchanger is the same as
the original heat exchanger. For the condensers, compare
part numbers on the heat exchangers. For the coolers, insulation covers the manufacturer’s part number. Make
sure the depths of the replacement and original cooler
heat exchangers are the same.
3. Recover the refrigerant from the system, and unsolder the
refrigerant-in and refrigerant-out connections.
4. Remove the four nuts holding the heat exchanger to the
brackets. Save the nuts.
5. Install the replacement heat exchanger in the unit and attach to the bracket using the four nuts removed in Step 4.
For sizes 015 and 020, torque is 7-10 ft-lb. For sizes 030045, torque is 35 to 50 ft-lb.
6. Carefully braze the refrigerant lines to the connections on
the heat exchanger. Lines should be soldered using silver
as the soldering material with a minimum of 45% silver.
Keep the temperature below 1472 F (800 C) under normal soldering conditions (no vacuum) to prevent the copper solder of the brazed plate heat exchanger from changing its structure. Failure to do so can result in internal
or external leakage at the connections which cannot be
repaired.
7. For coolers, ensure that the original size tubing is used
(1/2-in. for sizes 015 and 020 and 5/8-in. for sizes 030-045)
between the TXV and the cooler. The TXV must be located within 1 ft of the heat exchanger, with no bends between the TXV outlet and the cooler inlet.
8. Reconnect the water/brine lines.
9. Dehydrate and recharge the unit. Check for leaks.
BRAZED-PLATE COOLER AND CONDENSER HEAT
EXCHANGER CLEANING — Brazed-plate heat exchangers must be cleaned chemically. A professional cleaning service skilled in chemical cleaning should be used. Use a weak
acid (5% phosphoric acid, or if the heat exchanger is cleaned
frequently, 5% oxalic acid). Pump the cleaning solution
through the exchanger, preferably in a backflush mode. After
cleaning, rinse with large amounts of fresh water to dispose of
all the acid. Cleaning materials must be disposed of properly.
Check Refrigerant Feed Components
FILTER DRIER — The function of the filter drier is to maintain a clean, dry system. The moisture indicator (described
below) indicates any need to change the filter drier. The filter
drier is a sealed-type drier. When the drier needs to be
changed, the entire filter drier must be replaced.
MOISTURE-LIQUID INDICATOR — The indicator is located
immediately ahead of the TXV to provide an indication of the
refrigerant moisture content. It also provides a sight glass for
refrigerant liquid. Clear flow of liquid refrigerant (at full unit
loading) indicates sufficient charge in the system. Bubbles in the
sight glass (at full unit loading) indicate an undercharged system
or the presence of noncondensables. Moisture in the system,
measured in parts per million (ppm), changes the color of the
indicator as follows:
Green (safe) —Moisture is below 75 ppm
Yellow-Green (caution) — 75 to 150 ppm
Yellow (wet) — above 150 ppm
The unit must be in operation at least 12 hours before the
moisture indicator gives an accurate reading, and must be in
contact with liquid refrigerant. At the first sign of moisture in
the system, change the corresponding filter drier.
The strainers in front of the water/brine inlets of the heat
exchangers should be cleaned periodically, depending on condition of the chiller water/brine.
30
The valve(s) is factory-set to maintain between 8° and 10° F
(4.4° and 5.6° C) of superheat leaving the cooler. Check the
superheat during operation after conditions have stabilized. If
necessary, adjust the superheat to prevent refrigerant floodback
to the compressor.
THERMOSTATIC EXPANSION VALVE (TXV) — The
TXV controls the flow of liquid refrigerant to the cooler by
maintaining constant superheat of vapor leaving the cooler.
The valve is activated by a temperature-sensing bulb strapped
to the suction line.
Table 22 — Additional Lubrication Recommendation — English
30MPA UNIT CONDENSER ADDITIONAL LUBRICANT (FLUID OUNCES) REQUIRED BASED ON ACTUAL REFRIGERANT LINE LENGTH
SIZE
09DP
UP TO 25 ft
25-50 ft
50-75 ft
75-100 ft
100-125 ft
125-150 ft
150-175 ft
175-200 ft
15
S018
0
9
11
12
13
14
15
16
20
S020
11
12
13
14
21
23
26
28
30
S030
13
15
17
20
22
24
27
29
40
M040
27
30
33
36
51
57
63
68
45
M050
27
30
33
37
52
57
63
69
NOTE: This chart is based on recommended pipe sizes.
Table 23 — Additional Lubrication Recommendation — SI
30MPA UNIT CONDENSER ADDITIONAL LUBRICANT (FLUID OUNCES) REQUIRED BASED ON ACTUAL REFRIGERANT LINE LENGTH
SIZE
09DP
UP TO 7.5 M
7.5-15 M
15-22.5 M
22.5-30 M
30-37.5 M
37.5-45 M
45-52.5 M
52.5-60 M
15
S018
0
262
319
352
384
417
450
482
20
S020
315
347
380
413
620
688
756
823
30
S030
372
440
508
575
643
710
778
846
40
M040
784
881
977
1074
1511
1676
1841
2005
45
M050
791
888
984
1081
1518
1683
1848
2012
NOTE: This chart is based on recommended pipe sizes.
HPS
CWFS
DPT
EWT
HPS
LWT
RGT
SPT
—
—
—
—
—
—
—
DPT
LEGEND
Chilled Water Flow Switch
Discharge Pressure Transducer
Entering Water Thermistor
High Pressure Switch
Leaving Water Thermistor
Return Gas Thermistor (Optional)
Suction Pressure Transducer
RGT
SPT
EWT
(HIDDEN)
CWFS
LWT
a30-5049
Fig. 21 — Compressor Location — 30MP015-045 Units (30MPW045 Unit Shown)
31
COOLER FREEZE-UP PROTECTION
MINIMUM LOAD VALVE — On units equipped with the
factory-installed hot gas bypass option, a solenoid valve and
discharge bypass valve (minimum load valve) are located
between the discharge line and the cooler entering-refrigerant
line. The MBB cycles the solenoid to perform minimum load
valve function and the discharge bypass valve modulates to the
suction pressure set point of the valve. The bypass valve has an
adjustable opening setting between 95 to 115 psig (655 to
793 kPa). The factory setting is 105 psig (724 kPa). Refer to
cooler pump sequence of operation.
The amount of capacity reduction achieved by the minimum load valve is not adjustable. The total unit capacity with
the minimum load valve is shown in Table 9.
PRESSURE RELIEF DEVICES — All units have one pressure relief device per circuit located in the liquid line which relieves at 210 F (100 C).
The 30MPW unit does not have a condenser pressure relief
valve because the brazed-plate condenser is not considered a
pressure vessel, as defined in ANSI/ASHRAE 15 (American
National Standards Institute/American Society of Heating,
Refrigerating, and Air-Conditioning Engineers) safety code
requirements.
For 30MPA condenserless units, pressure relief devices designed to relieve at the pressure determined in local codes,
must be field-supplied and installed in the discharge line piping
in accordance with ANSI/ASHRAE 15 safety code requirements. Additional pressure relief valves, properly selected,
must be field-supplied and installed to protect high side equipment and may be required by applicable codes.
Most codes require that a relief valve be vented directly to
the outdoors. The vent line must not be smaller than the relief
valve outlet. Consult ANSI/ASHRAE 15 for detailed information concerning layout and sizing of relief vent lines.
WARNING
On medium temperature brine units, the anti-freeze solution must be properly mixed to prevent freezing at a temperature of at least 15 F (8.3 C) below the leaving-fluid
temperature set point. Failure to provide the proper antifreeze solution mixture is considered abuse and may impair
or otherwise negatively impact the Carrier warranty.
The main base board (MBB) monitors cooler leaving fluid
temperature at all times. The MBB will rapidly remove stages
of capacity as necessary to prevent freezing conditions due to
the rapid loss of load or low cooler fluid flow.
When the cooler is exposed to lower temperatures (40 F
[4.4 C] or below), freeze-up protection is required using inhibited ethylene or propylene glycol.
Thermistors — Electronic control uses up to five 5,000
ohmsthermistors to sense temperatures used to control operation of the chiller. Thermistors EWT, LWT, RGTA, CNDE,
CNDL, and OAT are identical in their temperature and voltage
drop performance. The SPT space temperature thermistor has a
10,000 ohms input channel and it has a different set of temperature vs. resistance and voltage drop performance. Resistance
at various temperatures are listed in Tables 25-29. For dual
chiller operation, a dual chiller sensor is required which is a
5,000 ohms thermistor.
REPLACING THERMISTORS (EWT, LWT, RGT, CNDE,
CNDL) — Add a small amount of thermal conductive grease
to the thermistor well and end of probe. For all probes, tighten
the retaining nut ¼ turn past finger tight. See Fig. 22.
THERMISTOR/TEMPERATURE SENSOR CHECK — A
high quality digital volt-ohmmeter is required to perform this
check.
1. Connect the digital voltmeter across the appropriate themistor terminals at the J8 terminal strip on the main base
board (see Fig. 23).
2. Using the voltage reading obtained, read the sensor temperature from Tables 25-29.
3. To check thermistor accuracy, measure temperature at
probe location with an accurate thermocouple-type temperature measuring instrument. Insulate thermocouple to
avoid ambient temperatures from influencing reading.
Temperature measured by thermocouple and temperature
determined from thermistor voltage reading should be
close, ± 5° F (3° C) if care was taken in applying thermocouple and taking readings.
If a more accurate check is required, unit must be shut down
and thermistor removed and checked at a known temperature
(freezing point or boiling point of water) using either voltage
drop measured across thermistor at the J8 terminal, by determining the resistance with chiller shut down and thermistor
disconnected from J8. Compare the values determined with the
value read by the control in the Temperatures mode using the
scrolling marquee display.
Check Unit Safeties
HIGH-PRESSURE SWITCH — A high-pressure switch is
provided to protect the circuit and refrigeration system from
unsafe high pressure conditions. See Table 24 for high-pressure
switch settings.
The high-pressure switch is mounted in the discharge line of
the circuit. If an unsafe, high-pressure condition should exist,
the switch opens and shuts off the unit. The MBB senses the
HPS feedback signal and generates an appropriate alarm. The
MBB prevents the circuit from restarting until the alert condition is reset. The switch should open at the pressure corresponding to the appropriate switch setting as shown in
Table 24.
Table 24 — Factory Settings, High-Pressure
Switch (Fixed)
UNIT
30MP015-045
CUTOUT
Psig
kPa
650
4482
CUT-IN
Psig
500
kPa
3447
Clear the alarm using the scrolling marquee display. The
unit should restart after the compressor anti-short-cycle delay,
built into the unit control module, expires.
PRESSURE TRANSDUCERS — Each unit is equipped with
a suction and discharge pressure transducer. These inputs to the
MBB are not only used to monitor the status of the unit, but to
also maintain operation of the chiller within the compressor
manufacturer's specified limits. The input to the MBB from the
suction pressure transducer is also used to protect the compressor from operating at low pressure conditions. If suction return
gas thermistors are installed, then additional low superheat
conditions are detected. In some cases, the unit may not be able
to run at full capacity. The control module will automatically
reduce the capacity of a circuit as needed to maintain specified
maximum/minimum operating pressures.
Pressure Transducers — The suction and discharge
transducers are different part numbers and can be distinguished
by the color of the transducer body, suction (yellow) and discharge (red). No pressure transducer calibration is required.
The transducers operate on a 5 vdc supply, which is generated
by the main base board (MBB). See Fig. 23 for transducer connections to the J8 connector on the MBB.
TROUBLESHOOTING — If a transducer is suspected of being faulty, first check supply voltage to the transducer. Supply
voltage should be 5 vdc ± 0.2 v. If supply voltage is correct,
compare pressure reading displayed on the scrolling marquee
display module against pressure shown on a calibrated pressure
32
4. Wrong pump motor rotation. Pump must rotate clockwise
when viewed from motor end of pump.
gauge. Pressure readings should be within ± 15 psig. If the
two readings are not reasonably close, replace the pressure
transducer.
Chilled Water Flow Switch — A factory-installed
1
flow switch is installed in the leaving fluid piping for all units.
This is a thermal-dispersion flow switch with no field adjustments. The switch is set for approximately 0.5 ft/sec of flow.
The sensor tip houses two thermistors and a heater element.
One thermistor is located in the sensor tip, closest to the flowing fluid. See Fig. 24. This thermistor is used to detect changes
in the flow velocity of the liquid. The second thermistor is
bonded to the cylindrical wall and is affected only by changes
in the temperature of the liquid. The thermistors are positioned
to be in close contact with the wall of the sensor probe and, at
the same time, to be kept separated from each other within the
confines of the probe.
In order to sense flow, it is necessary to heat one of the
thermistors in the probe. When power is applied, the tip of the
probe is heated. As the fluid starts to flow, heat will be carried
away from the sensor tip. Cooling of the first thermistor is a
function of how fast heat is conducted away by the flowing
liquid.
The difference in temperature between the two thermistors
provides a measurement of fluid velocity past the sensor probe.
When fluid velocity is high, more heat will be carried away
from the heated thermistor and the temperature differential will
be small. As fluid velocity decreases, less heat will be taken
from the heated thermistor and there will be an increase in temperature differential.
When unit flow rate is above the minimum flow rate, then
the output is switched on, sending 24 vac to the MBB to prove
flow has been established.
For recommended maintenance, check the flow switch operation. If operation is erratic check the sensor tip for build-up
every 6 months. Clean the tip with a soft cloth. If necessary,
build-up (e.g., lime) can be removed with a common vinegar
cleansing agent.
The flow sensor cable is provided with (3) LEDs that indicate if 24 vac power is present and also status of the switch
contacts. The LEDs are as follows:
• Green LED ON – 24 vac present
• One Yellow LED ON – Flow sensor switch OPEN
• Two Yellow LED ON – Flow sensor switch CLOSED
If nuisance trips of the sensor are occurring, follow the
steps below to correct the situation:
1. Check to confirm that the field-installed strainer is clean.
Use the blow-down valve provided or remove the screen
and clean it. For the case of VFD controlled pumps, ensure that the minimum speed setting has not been
changed.
2. Measure the pressure drop across the cooler and compare
this to the system requirements.
3. Verify that cable connections at the switch and at the terminal block are secure.
2
3
4
5
6
7
8
BASE
BOARD
9
10
11
12
J8
13
14
15
16
17
18
19
20
21
22
23
24
25
26
ACCSY
DPT
EWT
LWT
LVT
OAT
RGT
SEN
SPT
—
—
—
—
—
—
—
—
—
CONDENSER EWT
ACCESSORY
1
2
CONDENSER LWT
ACCESSORY
3
4
5
6
1
LVT
J12
T55
BLU
3
23
VIO
4
22
RED
5
21
SEN
2
OAT ACCESSORY OR
DUAL CHILLER LWT
RGTA
ACCESSORY
3
4
1
2
3
4
COOLER ENTERING
FLUID TEMP
RED
BLK
COOLER LEAVING
FLUID TEMP
RED
BLK
1
2
3
4
5
6
7
8
9
10
11
12
RED
GRN
BLK
RED
GRN
BLK
B
C
A
+
DPTA
-
B
C
+
A
-
SPTA
a30-5043
LEGEND
Accessory
Discharge Pressure Transducer
Entering Water Temperature
Leaving Water Temperature Sensor
Low Voltage Terminal
Outdoor Air Temperature Sensor
Return Gas Temperature Sensor
Sensor Terminal Block
Space Temperature Sensor
Fig. 23 — Thermistor Connections to
Main Base Board, J8 Connector
a30-499
NOTE: Dimensions are in millimeters.
Fig. 24 — Chilled Water Flow Switch
5/8 in. HEX
1/4-18 NPT
6" MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
Fig. 22 — Thermistor Well
33
T-55
ACCSY
Table 25 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)
TEMP
(F)
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
VOLTAGE
DROP
(V)
3.699
3.689
3.679
3.668
3.658
3.647
3.636
3.624
3.613
3.601
3.588
3.576
3.563
3.550
3.536
3.523
3.509
3.494
3.480
3.465
3.450
3.434
3.418
3.402
3.386
3.369
3.352
3.335
3.317
3.299
3.281
3.262
3.243
3.224
3.205
3.185
3.165
3.145
3.124
3.103
3.082
3.060
3.038
3.016
2.994
2.972
2.949
2.926
2.903
2.879
2.856
2.832
2.808
2.784
2.759
2.735
2.710
2.685
2.660
2.634
2.609
2.583
2.558
2.532
2.506
2.480
2.454
2.428
2.402
2.376
2.349
2.323
2.296
2.270
2.244
2.217
2.191
2.165
2.138
2.112
2.086
2.060
2.034
2.008
RESISTANCE
(Ohms)
TEMP
(F)
98,010
94,707
91,522
88,449
85,486
82,627
79,871
77,212
74,648
72,175
69,790
67,490
65,272
63,133
61,070
59,081
57,162
55,311
53,526
51,804
50,143
48,541
46,996
45,505
44,066
42,679
41,339
40,047
38,800
37,596
36,435
35,313
34,231
33,185
32,176
31,202
30,260
29,351
28,473
27,624
26,804
26,011
25,245
24,505
23,789
23,096
22,427
21,779
21,153
20,547
19,960
19,393
18,843
18,311
17,796
17,297
16,814
16,346
15,892
15,453
15,027
14,614
14,214
13,826
13,449
13,084
12,730
12,387
12,053
11,730
11,416
11,112
10,816
10,529
10,250
9,979
9,717
9,461
9,213
8,973
8,739
8,511
8,291
8,076
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
VOLTAGE
DROP
(V)
1.982
1.956
1.930
1.905
1.879
1.854
1.829
1.804
1.779
1.754
1.729
1.705
1.681
1.656
1.632
1.609
1.585
1.562
1.538
1.516
1.493
1.470
1.448
1.426
1.404
1.382
1.361
1.340
1.319
1.298
1.278
1.257
1.237
1.217
1.198
1.179
1.160
1.141
1.122
1.104
1.086
1.068
1.051
1.033
1.016
0.999
0.983
0.966
0.950
0.934
0.918
0.903
0.888
0.873
0.858
0.843
0.829
0.815
0.801
0.787
0.774
0.761
0.748
0.735
0.723
0.710
0.698
0.686
0.674
0.663
0.651
0.640
0.629
0.618
0.608
0.597
0.587
0.577
0.567
0.557
0.548
0.538
0.529
0.520
34
RESISTANCE
(Ohms)
TEMP
(F)
7,686
7,665
7,468
7,277
7,091
6,911
6,735
6,564
6,399
6,238
6,081
5,929
5,781
5,637
5,497
5,361
5,229
5,101
4,976
4,855
4,737
4,622
4,511
4,403
4,298
4,196
4,096
4,000
3,906
3,814
3,726
3,640
3,556
3,474
3,395
3,318
3,243
3,170
3,099
3,031
2,964
2,898
2,835
2,773
2,713
2,655
2,597
2,542
2,488
2,436
2,385
2,335
2,286
2,239
2,192
2,147
2,103
2,060
2,018
1,977
1,937
1,898
1,860
1,822
1,786
1,750
1,715
1,680
1,647
1,614
1,582
1,550
1,519
1,489
1,459
1,430
1,401
1,373
1,345
1,318
1,291
1,265
1,240
1,214
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
VOLTAGE
DROP
(V)
0.511
0.502
0.494
0.485
0.477
0.469
0.461
0.453
0.445
0.438
0.430
0.423
0.416
0.408
0.402
0.395
0.388
0.381
0.375
0.369
0.362
0.356
0.350
0.344
0.339
0.333
0.327
0.322
0.317
0.311
0.306
0.301
0.296
0.291
0.286
0.282
0.277
0.272
0.268
0.264
0.259
0.255
0.251
0.247
0.243
0.239
0.235
0.231
0.228
0.224
0.220
0.217
0.213
0.210
0.206
0.203
0.200
0.197
0.194
0.191
0.188
0.185
0.182
0.179
0.176
0.173
0.171
0.168
0.165
0.163
0.160
0.158
0.155
0.153
0.151
0.148
0.146
0.144
0.142
0.140
0.138
0.135
0.133
RESISTANCE
(Ohms)
1,190
1,165
1,141
1,118
1,095
1,072
1,050
1,029
1,007
986
965
945
925
906
887
868
850
832
815
798
782
765
750
734
719
705
690
677
663
650
638
626
614
602
591
581
570
561
551
542
533
524
516
508
501
494
487
480
473
467
461
456
450
445
439
434
429
424
419
415
410
405
401
396
391
386
382
377
372
367
361
356
350
344
338
332
325
318
311
304
297
289
282
Table 26 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)
TEMP
(C)
–32
–31
–30
–29
–28
–27
–26
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VOLTAGE
DROP
(V)
3.705
3.687
3.668
3.649
3.629
3.608
3.586
3.563
3.539
3.514
3.489
3.462
3.434
3.406
3.376
3.345
3.313
3.281
3.247
3.212
3.177
3.140
3.103
3.065
3.025
2.985
2.945
2.903
2.860
2.817
2.774
2.730
2.685
2.639
2.593
2.547
2.500
2.454
2.407
2.360
2.312
2.265
2.217
2.170
2.123
2.076
2.029
RESISTANCE
(Ohms)
TEMP
(C)
100,260
94,165
88,480
83,170
78,125
73,580
69,250
65,205
61,420
57,875
54,555
51,450
48,536
45,807
43,247
40,845
38,592
38,476
34,489
32,621
30,866
29,216
27,633
26,202
24,827
23,532
22,313
21,163
20,079
19,058
18,094
17,184
16,325
15,515
14,749
14,026
13,342
12,696
12,085
11,506
10,959
10,441
9,949
9,485
9,044
8,627
8,231
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
VOLTAGE
DROP
(V)
1.982
1.935
1.889
1.844
1.799
1.754
1.710
1.666
1.623
1.580
1.538
1.497
1.457
1.417
1.378
1.340
1.302
1.265
1.229
1.194
1.160
1.126
1.093
1.061
1.030
0.999
0.969
0.940
0.912
0.885
0.858
0.832
0.807
0.782
0.758
0.735
0.713
0.691
0.669
0.649
0.629
0.610
0.591
0.573
0.555
0.538
0.522
35
RESISTANCE
(Ohms)
TEMP
(C)
7,855
7,499
7,161
6,840
6,536
6,246
5,971
5,710
5,461
5,225
5,000
4,786
4,583
4,389
4,204
4,028
3,861
3,701
3,549
3,404
3,266
3,134
3,008
2,888
2,773
2,663
2,559
2,459
2,363
2,272
2,184
2,101
2,021
1,944
1,871
1,801
1,734
1,670
1,609
1,550
1,493
1,439
1,387
1,337
1,290
1,244
1,200
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
VOLTAGE
DROP
(V)
0.506
0.490
0.475
0.461
0.447
0.433
0.420
0.407
0.395
0.383
0.371
0.360
0.349
0.339
0.329
0.319
0.309
0.300
0.291
0.283
0.274
0.266
0.258
0.251
0.244
0.237
0.230
0.223
0.217
0.211
0.204
0.199
0.193
0.188
0.182
0.177
0.172
0.168
0.163
0.158
0.154
0.150
0.146
0.142
0.138
0.134
RESISTANCE
(Ohms)
1,158
1,118
1,079
1,041
1,006
971
938
906
876
836
805
775
747
719
693
669
645
623
602
583
564
547
531
516
502
489
477
466
456
446
436
427
419
410
402
393
385
376
367
357
346
335
324
312
299
285
Table 27 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop
(For SPT)
TEMP
(F)
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
VOLTAGE
DROP
(V)
4.758
4.750
4.741
4.733
4.724
4.715
4.705
4.696
4.686
4.676
4.665
4.655
4.644
4.633
4.621
4.609
4.597
4.585
4.572
4.560
4.546
4.533
4.519
4.505
4.490
4.476
4.461
4.445
4.429
4.413
4.397
4.380
4.363
4.346
4.328
4.310
4.292
4.273
4.254
4.235
4.215
4.195
4.174
4.153
4.132
4.111
4.089
4.067
4.044
4.021
3.998
3.975
3.951
3.927
3.903
3.878
3.853
3.828
3.802
3.776
3.750
3.723
3.697
3.670
3.654
3.615
3.587
3.559
3.531
3.503
3.474
3.445
3.416
3.387
3.357
3.328
3.298
3.268
3.238
3.208
3.178
3.147
3.117
3.086
3.056
3.025
RESISTANCE
(Ohms)
TEMP
(F)
196,453
189,692
183,300
177,000
171,079
165,238
159,717
154,344
149,194
144,250
139,443
134,891
130,402
126,183
122,018
118,076
114,236
110,549
107,006
103,558
100,287
97,060
94,020
91,019
88,171
85,396
82,729
80,162
77,662
75,286
72,940
70,727
68,542
66,465
64,439
62,491
60,612
58,781
57,039
55,319
53,693
52,086
50,557
49,065
47,627
46,240
44,888
43,598
42,324
41,118
39,926
38,790
37,681
36,610
35,577
34,569
33,606
32,654
31,752
30,860
30,009
29,177
28,373
27,597
26,838
26,113
25,396
24,715
24,042
23,399
22,770
22,161
21,573
20,998
20,447
19,903
19,386
18,874
18,384
17,904
17,441
16,991
16,552
16,131
15,714
15,317
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
VOLTAGE
DROP
(V)
2.994
2.963
2.932
2.901
2.870
2.839
2.808
2.777
2.746
2.715
2.684
2.653
2.622
2.592
2.561
2.530
2.500
2.470
2.439
2.409
2.379
2.349
2.319
2.290
2.260
2.231
2.202
2.173
2.144
2.115
2.087
2.059
2.030
2.003
1.975
1.948
1.921
1.894
1.867
1.841
1.815
1.789
1.763
1.738
1.713
1.688
1.663
1.639
1.615
1.591
1.567
1.544
1.521
1.498
1.475
1.453
1.431
1.409
1.387
1.366
1.345
1.324
1.304
1.284
1.264
1.244
1.225
1.206
1.187
1.168
1.150
1.132
1.114
1.096
1.079
1.062
1.045
1.028
1.012
0.996
0.980
0.965
0.949
0.934
0.919
0.905
36
RESISTANCE
(Ohms)
TEMP
(F)
14,925
14,549
14,180
13,824
13,478
13,139
12,814
12,493
12,187
11,884
11,593
11,308
11,031
10,764
10,501
10,249
10,000
9,762
9,526
9,300
9,078
8,862
8,653
8,448
8,251
8,056
7,869
7,685
7,507
7,333
7,165
6,999
6,838
6,683
6,530
6,383
6,238
6,098
5,961
5,827
5,698
5,571
5,449
5,327
5,210
5,095
4,984
4,876
4,769
4,666
4,564
4,467
4,370
4,277
4,185
4,096
4,008
3,923
3,840
3,759
3,681
3,603
3,529
3,455
3,383
3,313
3,244
3,178
3,112
3,049
2,986
2,926
2,866
2,809
2,752
2,697
2,643
2,590
2,539
2,488
2,439
2,391
2,343
2,297
2,253
2,209
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
VOLTAGE
DROP
(V)
0.890
0.876
0.862
0.848
0.835
0.821
0.808
0.795
0.782
0.770
0.758
0.745
0.733
0.722
0.710
0.699
0.687
0.676
0.666
0.655
0.645
0.634
0.624
0.614
0.604
0.595
0.585
0.576
0.567
0.558
0.549
0.540
0.532
0.523
0.515
0.507
0.499
0.491
0.483
0.476
0.468
0.461
0.454
0.447
0.440
0.433
0.426
0.419
0.413
0.407
0.400
0.394
0.388
0.382
0.376
0.370
0.365
0.359
0.354
0.349
0.343
0.338
0.333
0.328
0.323
0.318
0.314
0.309
0.305
0.300
0.296
0.292
0.288
0.284
0.279
0.275
0.272
0.268
0.264
RESISTANCE
(Ohms)
2,166
2,124
2,083
2,043
2,003
1,966
1,928
1,891
1,855
1,820
1,786
1,752
1,719
1,687
1,656
1,625
1,594
1,565
1,536
1,508
1,480
1,453
1,426
1,400
1,375
1,350
1,326
1,302
1,278
1,255
1,233
1,211
1,190
1,169
1,148
1,128
1,108
1,089
1,070
1,052
1,033
1,016
998
981
964
947
931
915
900
885
870
855
841
827
814
800
787
774
762
749
737
725
714
702
691
680
670
659
649
639
629
620
610
601
592
583
574
566
557
Table 28 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop
(For SPT)
TEMP
(C)
–32
–31
–30
–29
–28
–27
–26
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
–12
–11
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VOLTAGE
DROP
(V)
4.762
4.748
4.733
4.716
4.700
4.682
4.663
4.644
4.624
4.602
4.580
4.557
4.533
4.508
4.482
4.455
4.426
4.397
4.367
4.335
4.303
4.269
4.235
4.199
4.162
4.124
4.085
4.044
4.003
3.961
3.917
3.873
3.828
3.781
3.734
3.686
3.637
3.587
3.537
3.485
3.433
3.381
3.328
3.274
3.220
3.165
3.111
RESISTANCE
(Ohms)
TEMP
(C)
200,510
188,340
177,000
166,342
156,404
147,134
138,482
130,402
122,807
115,710
109,075
102,868
97,060
91,588
86,463
81,662
77,162
72,940
68,957
65,219
61,711
58,415
55,319
52,392
49,640
47,052
44,617
42,324
40,153
38,109
36,182
34,367
32,654
31,030
29,498
28,052
26,686
25,396
24,171
23,013
21,918
20,883
19,903
18,972
18,090
17,255
16,464
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
VOLTAGE
DROP
(V)
3.056
3.000
2.944
2.889
2.833
2.777
2.721
2.666
2.610
2.555
2.500
2.445
2.391
2.337
2.284
2.231
2.178
2.127
2.075
2.025
1.975
1.926
1.878
1.830
1.784
1.738
1.692
1.648
1.605
1.562
1.521
1.480
1.439
1.400
1.362
1.324
1.288
1.252
1.217
1.183
1.150
1.117
1.086
1.055
1.025
0.996
0.968
RESISTANCE
(Ohms)
TEMP
(C)
15,714
15,000
14,323
13,681
13,071
12,493
11,942
11,418
10,921
10,449
10,000
9,571
9,164
8,776
8,407
8,056
7,720
7,401
7,096
6,806
6,530
6,266
6,014
5,774
5,546
5,327
5,117
4,918
4,727
4,544
4,370
4,203
4,042
3,889
3,743
3,603
3,469
3,340
3,217
3,099
2,986
2,878
2,774
2,675
2,579
2,488
2,400
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
VOLTAGE
DROP
(V)
0.940
0.913
0.887
0.862
0.837
0.813
0.790
0.767
0.745
0.724
0.703
0.683
0.663
0.645
0.626
0.608
0.591
0.574
0.558
0.542
0.527
0.512
0.497
0.483
0.470
0.457
0.444
0.431
0.419
0.408
0.396
0.386
0.375
0.365
0.355
0.345
0.336
0.327
0.318
0.310
0.302
0.294
0.287
0.279
0.272
0.265
RESISTANCE
(Ohms)
2,315
2,235
2,157
2,083
2,011
1,943
1,876
1,813
1,752
1,693
1,637
1,582
1,530
1,480
1,431
1,385
1,340
1,297
1,255
1,215
1,177
1,140
1,104
1,070
1,037
1,005
974
944
915
889
861
836
811
787
764
742
721
700
680
661
643
626
609
592
576
561
Table 29 — 86K Thermistor vs Resistance (DTT)
TEMP
(C)
TEMP
(F)
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
70
-40
-31
-22
-13
-4
5
14
23
32
41
50
59
68
77
86
95
104
113
122
131
140
158
RESISTANCE
(Ohms)
TEMP
(C)
TEMP
(F)
2,889,600
2,087,220
1,522,200
1,121,440
834,720
627,280
475,740
363,990
280,820
218,410
171,170
135,140
107,440
86,000
69,280
56,160
45,810
37,580
30,990
25,680
21,400
15,070
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
155
160
165
170
175
180
167
176
185
194
203
212
221
230
239
248
257
266
275
284
293
302
311
320
329
338
347
356
37
RESISTANCE
(Ohms)
12,730
10,790
9,200
7,870
6,770
5,850
5,090
4,450
3,870
3,350
2,920
2,580
2,280
2,020
1,800
1,590
1,390
1,250
1,120
1,010
920
830
8. Verify the ENABLE/OFF/REMOTE CONTACT switch
is in the OFF position.
9. Restore control power. Verify that all module red LEDs
blink in unison. Verify that all green LEDs are blinking
and that the scrolling marquee or Navigator™ display is
communicating correctly.
10. Verify all configuration information, settings, set points
and schedules. Return the ENABLE/OFF/REMOTE
CONTACT switch to its previous position.
Strainer — Periodic cleaning of the required field-installed
strainer is required. Pressure drop across strainer in excess of
3 psi (21 kPa) indicates the need for cleaning. Normal (clean)
pressure drop is approximately 1 psi (6.9 kPa). Open the
blowdown valve to clean the strainer. If required, shut the chiller down and remove the strainer screen to clean. When strainer
has been cleaned, enter ‘YES’ for Strainer Maintenance Done
(Run StatusPMS.T.MN).
Replacing Defective Modules — The Comfort-
Link replacement modules are shown in Table 30. If the main
base board (MBB) has been replaced, verify that all configuration data is correct. Follow the Configuration mode table and
verify that all items under sub-modes UNIT, OPT1 and OPT2
are correct. Any additional field-installed accessories or options (RSET, SLCT sub-modes) should also be verified as well
as any specific time and maintenance schedules.
Refer to the Start-Up Checklist for 30MP Liquid Chillers
(completed at time of original start-up) found in the job folder.
This information is needed later in this procedure. If the checklist does not exist, fill out the current information in the Configuration mode on a new checklist. Tailor the various options and
configurations as needed for this particular installation.
Table 30 — Replacement Modules
MODULE
Main Base Board (MBB)
Scrolling Marquee Display
Energy Management Module (EMM)
Navigator Display
REPLACEMENT
PART NO.
(with Software)
30MP500346
HK50AA031
30GT515218
HK50AA033
MAINTENANCE
Recommended Maintenance Schedule — The
following are only recommended guidelines. Jobsite conditions may dictate that maintenance schedule is performed
more often than recommended.
Routine:
Every month:
• Check moisture indicating sight glass for possible refrigerant loss and presence of moisture.
Every 3 months (for all machines):
• Check refrigerant charge.
• Check all refrigerant joints and valves for refrigerant
leaks, repair as necessary.
• Check chilled water flow switch operation.
• Check compressor oil level.
Every 12 months (for all machines):
• Check all electrical connections, tighten as necessary.
• Inspect all contactors and relays, replace as necessary.
• Check accuracy of thermistors, replace if greater than
± 2° F (1.2° C) variance from calibrated thermometer.
• Check to be sure that the proper concentration of antifreeze is present in the chilled water loop, if applicable.
• Verify that the chilled water loop is properly treated.
• Check refrigerant filter driers for excessive pressure
drop, replace as necessary.
• Check chilled water and condenser strainers, clean as
necessary.
• Perform Service Test to confirm operation of all
components.
• Check for excessive cooler approach (Leaving Chilled
Water Temperature — Saturated Suction Temperature)
which may indicate fouling. Clean evaporator if
necessary.
WARNING
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work
is completed.
1. Check that all power to unit is off. Carefully disconnect
all wires from the defective module by unplugging its
connectors.
2. Remove the defective module by removing its mounting
screws with a Phillips screwdriver, and removing the
module from the control box. Save the screws later use.
3. Verify that the instance jumper (MBB) or address switches (all other modules) exactly match the settings of the
defective module.
NOTE: Handle boards by mounting standoffs only to
avoid electrostatic discharge.
4. Package the defective module in the carton of the new
module for return to Carrier.
5. Mount the new module in the unit’s control box using a
Phillips screwdriver and the screws saved in Step 2.
6. Reinstall all module connectors. For accessory Navigator™ device replacement, make sure the plug is installed
at TB3 in the LEN connector.
7. Carefully check all wiring connections before restoring
power.
38
pressor when the internal temperature reaches approximately
300 F (149 C). At this temperature, an internal bi-metal disk
valve opens and causes the scroll elements to separate, which
stops compression. Suction and discharge pressures balance
while the motor continues to run. The longer the compressor
runs unloaded, the longer it must cool before the bi-metal disk
resets. See Fig. 26 for approximate reset times.
TROUBLESHOOTING
Complete Unit Stoppage and Restart — Possible causes for unit stoppage and reset methods are shown below and in Table 31. Refer to Fig. 3-7 for component arrangement and control wiring diagrams.
GENERAL POWER FAILURE — After power is restored,
restart is automatic through normal MBB start-up.
UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS
OFF — When the switch is OFF, the unit will stop immediately. Place the switch in the ENABLE position for local switch
control or in the REMOTE CONTACT position for control
through remote contact closure.
CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN —
After the problem causing the loss of flow has been corrected,
reset is manual by resetting the alarm with the scrolling
marquee.
OPEN 24-V CONTROL CIRCUIT BREAKER(S) — Determine the cause of the failure and correct. Reset circuit breaker(s). Restart is automatic after MBB start-up cycle is complete.
COOLING LOAD SATISFIED — Unit shuts down when
cooling load has been satisfied. Unit restarts when required to
satisfy leaving fluid temperature set point.
THERMISTOR FAILURE — If a thermistor fails in either an
open or shorted condition, the unit will be shut down. Replace
EWT, or LWT as required. Unit restarts automatically, but must
be reset manually by resetting the alarm with the scrolling
marquee.
Fig. 25 — Advanced Scroll Temperature
Protection Label
To manually reset ASTP, the compressor should be
stopped and allowed to cool. If the compressor is not stopped,
the motor will run until the motor protector trips, which occurs
up to 90 minutes later. Advanced scroll temperature protection
will reset automatically before the motor protector resets,
which may take up to 2 hours.
High Discharge Gas Temperature Protection — Units
equipped with optional digital compressors have an additional
thermistor located on the discharge line, If discharge temperature exceeds 265 F (129.4 C), the digital compressor will be
shut off.
Alarms will also occur if the current sensor board malfunctions or is not properly connected to its assigned digital input. If
the compressor is commanded OFF and the current sensor
reads ON, an alert is generated. This will indicate that a compressor contactor has failed closed. In this case, a special mode,
Compressor Stuck on Control, will be enabled and all other
compressors will be turned off. An alarm will then be enabled
to indicate that service is required. Outdoor fans will continue
to operate. The condenser output is turned on immediately.
CAUTION
If unit stoppage occurs more than once as a result of any of
the safety devices listed, determine and correct cause
before attempting another restart.
LOW SATURATED SUCTION — Several conditions can
lead to low saturated suction alarms and the chiller controls
have several override modes built in which will attempt to keep
the chiller from shutting down. Low fluid flow, low refrigerant
charge and plugged filter driers are the main causes for this
condition. To avoid permanent damage and potential freezing
of the system, do NOT repeatedly reset these alert and/or alarm
conditions without identifying and correcting the cause(s).
COMPRESSOR SAFETIES — The 30MP units with ComfortLink controls include a compressor protection board that
protects the operation of each of the compressors. Each board
senses the presence or absence of current to each compressor.
If there is a command for a compressor to run and there is
no current, then one of the following safeties or conditions
have turned the compressor off:
Compressor Overcurrent — All compressors have internal
line breaks or a motor protection device located in the compressor electrical box.
Compressor Short Circuit — There will not be current if the
compressor circuit breaker that provides short circuit protection
has tripped.
Compressor Motor Over Temperature — The internal linebreak or over temperature switch has opened.
High-Pressure Switch Trip — The high-pressure switch has
opened. See Table 24 for the factory settings for the fixed highpressure switch.
ASTP Protection Trip — All non-digital Copeland compressors are equipped with an advanced scroll temperature
protection (ASTP). A label located above the terminal box
identifies models that contain this technology. See Fig. 25.
Advanced scroll temperature protection is a form of internal
discharge temperature protection that unloads the scroll com-
Alarms and Alerts — These are warnings of abnormal
or fault conditions, and may cause either one circuit or the
whole unit to shut down. They are assigned code numbers as
described in Table 32.
Automatic alarms will reset without operator intervention if
the condition corrects itself. The following method must be
used to reset manual alarms:
Before resetting any alarm, first determine the cause of the
alarm and correct it. Enter the Alarms mode indicated by the
LED on the side of the scrolling marquee display. Press
until the sub-menu item RCRN “RESET
ENTER and
ALL CURRENT ALARMS” is displayed. Press ENTER .
The control will prompt the user for a password, by displaying
PASS and WORD. Press ENTER to display the default password, 1111. Press ENTER for each character. If the password
has been changed, use the arrow keys to change each individual character. Toggle the display to “YES” and press ENTER .
The alarms will be reset.
39
Recommended Cooling Time
(Minutes)
120
110
100
90
80
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
Compressor Unloaded Run Time (Minutes)
*Times are approximate.
NOTE: Various factors, including high humidity, high ambient temperature,
and the presence of a sound blanket will increase cool-down times.
Fig. 26 — Recommended Minimum Cool Down Time After Compressor is Stopped*
40
Table 31 — Troubleshooting
SYMPTOMS
Compressor Cycles
Off on Loss of Charge
Compressor Cycles Off on Out
of Range Condition
Compressor Shuts Down on
High-Pressure Control
Unit Operates Too Long
or Continuously
Unusual or Loud System
Noises
CAUSE
Loss of charge control. Acting erratically.
Low refrigerant charge
Low suction temperature
Thermistor failure
System load was reduced faster than controller could
remove stages
Temperature controller deadband setting is too low
High-pressure control acting erratically
Noncondensables in system
Condenser scaled/dirty
Fans in remote condensing unit (30MPA only) not operating
System overcharged with refrigerant
Low refrigerant charge
Control contacts fused
Air in system
Partially plugged or plugged expansion valve or filter drier
Defective insulation
Service load
Damaged compressor
Piping vibration
Expansion valve hissing
Compressor noisy
Compressor Loses Oil
Hot Liquid Line
Frosted Liquid Line
Frosted Suction Line
Freeze-Up
Leak in system
Mechanical damage (Failed seals or broken scrolls)
Oil trapped in line
Shortage of refrigerant due to leak
Restricted filter drier
Expansion valve admitting excess refrigerant (note: this is a
normal condition for brine applications)
Stuck TXV
Improper charging
System not drained for winter shutdown
Loose thermistor
41
REMEDY
Repair leak and recharge.
Replace control.
Add refrigerant.
Raise cooler leaving fluid temperature set point.
Replace thermistor.
Unit will restart after fluid temperature rises back into the
control band. Avoid rapidly removing system load or
increase loop volume.
Raise deadband setting.
Replace control.
Purge system.
Clean condenser.
Repair or replace if defective.
Reduce charge.
Add refrigerant.
Replace control.
Purge system.
Clean or replace as needed.
Replace or repair as needed.
Keep doors and windows closed.
Check compressor and replace if necessary.
Support piping as required.
Check for loose pipe connections or damaged compressor
Add refrigerant.
Check for plugged liquid line filter drier.
Replace compressor (worn bearings).
Check for loose compressor holddown bolts.
Repair leak.
Replace compressor.
Check piping for oil traps.
Repair leak and recharge.
Replace filter drier.
Replace valve if defective.
Replace valve if defective.
Make sure a full quantity of fluid is flowing through the cooler
while charging, and suction pressure in cooler is equal to or
greater than pressure corresponding to 32 F (0° C).
Recommended that system be filled with an appropriate glycol mixture to prevent freezing of pumps and fluid tubing.
Verify thermistors are fully inserted in wells.
Table 32 — Alarm and Alert Codes
ALARM/
ALERT
CODE
ALARM
OR
ALERT
A048
Alarm
Circuit A Compressor
Availability Alarm
Two compressors on circuit
failed
Circuit shut down
Manual
Only one compressor
operating.
T051
Alert
Circuit A, Compressor 1
Failure
Compressor feedback signal
does not match relay state
Compressor A1 shut
down.
Manual
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.
Alarm
Circuit A, Compressor 1
Failure
Respective current sensor
board (CSB) feedback signal
is ON when the compressor
should be off
Unit shut down
Manual
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.
T052
Alert
Circuit A, Compressor 2
Failure
Compressor feedback signal
does not match relay state
Compressor A2 shut
down.
Manual
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.
A052
Alarm
Circuit A, Compressor 2
Failure
Respective current sensor
board (CSB) feedback signal
is ON when the compressor
should be off
Unit shut down
Manual
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.
T053
Alert
Circuit A, Compressor 3
Failure
Compressor feedback signal
does not match relay state
Compressor A3 shut
down.
Manual
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.
A053
Alarm
Circuit A, Compressor 3
Failure
Respective current sensor
board (CSB) feedback signal
is ON when the compressor
should be off
Unit shut down
Manual
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, noncondensables, operation
beyond capability.
A060
Alarm
Cooler Leaving Fluid
Thermistor Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Chiller shut down
immediately
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
A061
Alarm
Cooler Entering Fluid
Thermistor Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Chiller shut down
immediately
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
T062
Alert
Condenser Leaving Fluid
Thermistor Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Alert only.
No action taken.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
T063
Alert
Condenser Entering Fluid
Thermistor Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Alert only.
No action taken.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
T068
None
Circuit A Return Gas
Thermistor Failure
If return gas sensors are
enabled (RG.EN) and
thermistor is outside range of
–40 to 245 F (–40 to 118 C)
Circuit A shut down
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
T073
Alert
Outside Air Thermistor
Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
(if enabled)
Temperature reset
disabled. Chiller runs
under normal control/set
points.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
T074
Alert
Thermistor outside range of
Space Temperature/Dual Chiller –40 to 245 F (–40 to 118 C)
Thermistor Failure
(if enabled)
Temperature reset
disabled. Chiller runs
under normal control/set
points.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
A077
Alarm
Circuit A Saturated
Suction Temperature
exceeds Cooler Leaving
Fluid Temperature
Faulty expansion valve,
suction pressure transducer
or leaving fluid thermistor.
Circuit A shutdown.
Manual
Faulty expansion valve or
suction pressure transducer
or leaving fluid thermistor.
T079
Alert
Lead/Lag LWT
Thermistor Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Chiller runs as a stand
alone machine
Automatic
Dual LWT thermistor failure,
damaged cable/wire or
wiring error.
A090
Alarm
Circuit A Discharge
Pressure Transducer Failure
Outside of range (0 - 667 psig) Circuit A shut down
Automatic
Transducer failure, poor
connection to MBB, or wiring
damage/error.
A092
Alarm
Circuit A Suction
Pressure Transducer Failure
Outside of range (0 - 420 psig) Circuit A shut down
Automatic
Transducer failure, poor
connection to MBB, or wiring
damage/error.
T094
Alert
Discharge Gas
Thermistor Failure
Discharge thermistor (DTT) is
either open or shorted outside
of range –39.9 to 356 F (–39.9
to 180 C)
Digital compressor shut
down.
Automatic
Thermistor failure, damaged
cable/wire or wiring error.
A110
Alarm
Circuit A Loss of Charge
If the compressors are off
and discharge pressure
reading is < 26 psig for
30 sec.
Circuit not allowed to
start.
Manual
Refrigerant leak or
transducer failure
A112
Alarm
Circuit A High Saturated
Suction Temperature
Circuit saturated suction
temperature pressure
transducer > 70 F (21.1 C)
for 5 minutes
Circuit shut down
Manual
Faulty Expansion valve,
faulty suction pressure
transducer or high entering
fluid temperature.
A114
Alarm
Circuit A Low Suction
Superheat
Suction superheat is
less than 5° F (2.8 C) for 5
minutes. (if RGT installed)
Circuit A shut down.
A051
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
42
RESET
METHOD
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
PROBABLE
CAUSE
Faulty expansion valve,
faulty suction pressure
transducer, faulty suction gas
thermistor, circuit
overcharged
Table 32 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE
ALARM
OR
ALERT
A116
Alarm
A122
Alarm
A126
Alarm
DESCRIPTION
Circuit A Low Cooler
Suction Temperature
High Pressure Switch
Trip Circuit A
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
Mode 7 caused the compressor to unload 3 consecutive times with less than a
Circuit shut down
30-minute interval between
each circuit shutdown.
High Pressure A Switch
Input open to MBB
Circuit shut down
RESET
METHOD
PROBABLE
CAUSE
Manual
Faulty expansion valve, low
refrigerant charge, plugged
filter drier, faulty suction
pressure transducer, low
cooler fluid flow
Manual
Faulty transducer/high
pressure switch.
Circuit shut down
Automatic, only
after first 3 daily
occurrences.
Manual reset
thereafter. SCT
must drop 5 F
(2.8 C) before
restart
Plugged filter drier unit operating outside of range. Faulty
transducer/high pressure
switch overcharged, low/
restricted condenser
airflow (30MPA) low or loss of
condenser flow (30MPW),
fouled condenser (30MPW)
Faulty or plugged TXV, low
refrigerant charge, TXV out
of adjustment, liquid
line valve partially closed.
Plugged filter drier. Low
cooler flow.
Circuit A High
Head Pressure
SCT >Maximum condensing
temperature from operating
envelope
Operation outside compressor operating envelope
Circuit shut down
Automatic
restart after first
daily occurrence.
Manual restart
thereafter.
T133
Alert
Circuit A Low Suction
Pressure
Suction pressure below
34 psig for 8 seconds or
below 23 psig
A140
Alert
Reverse Rotation
Detected
Incoming chiller power leads
not phased correctly
Chiller not allowed to
start.
Manual
Reverse any two incoming
power leads to correct. Check
for correct fan rotation first.
A150
Alarm
Emergency Stop
CCN emergency stop
command received
Chiller shutdown.
Automatic once
CCN command for
EMSTOP returns to
normal
CCN Network
command.
A151
Alarm
Illegal Configuration
One or more illegal
configurations exists.
Chiller is not allowed to
start.
Manual once
configuration errors
are corrected
Configuration error.
Check unit settings.
A152
Alarm
Unit Down Due to
Failure
Both circuits are down due
to alarms/alerts.
Chiller is unable
to run.
Automatic once
alarms/alerts are
cleared that prevent the chiller from
starting.
Alarm notifies user
that chiller is 100%
down.
T153
Alert
Real Time Clock
Hardware Failure
Internal clock on MBB fails
Occupancy schedule
will not be used. Chiller
defaults to Local On
mode.
Automatic when
correct clock control restarts.
Time/Date/Month/
Day/Year not
properly set.
A154
Alarm
Serial EEPROM
Hardware Failure
Hardware failure with MBB
Chiller is unable
to run.
Manual
Main Base Board
failure.
T155
Alert
Serial EEPROM
Storage Failure
Configuration/storage
failure with MBB
No Action
Manual
Potential failure of
MBB. Download
current operating
software. Replace
MBB if error occurs again.
A156
Alarm
Critical Serial EEPROM
Storage Failure
Configuration/storage
failure with MBB
Chiller is not allowed
to run.
Manual
Main Base Board
failure.
A157
Alarm
A/D Hardware Failure
Hardware failure with
peripheral device
Chiller is not allowed
to run.
Manual
Main Base Board
failure.
Automatic
Wiring error, faulty
wiring or failed
Energy Management Module
(EMM).
T173
Alert
Loss of Communication
with EMM
MBB loses communication
with EMM
4 to 20 mA
temperature reset
disabled. Demand
Limit set to 100%. 4 to
20 mA set point
disabled.
T174
Alert
4 to 20 mA Cooling Set
Point Input Failure
If configured with EMM and
input less than 2 mA or
greater than 22 mA
Set point function
disabled. Chiller
controls to CSP1.
Automatic
Faulty signal
generator, wiring
error, or faulty EMM.
T175
Alert
Loss of Communication
with AUX Board
MBB losses communication
with AUX board
Digital control is disabled.
Automatic
Wiring error, faulty wiring,
failed AUX board, ditital
option enabled, Configuration→Unit→AI.TY=YES
T176
Alert
4 to 20 mA
Temperature Reset
Input Failure
If configured with EMM
and input less than 2 mA or
greater than 22 mA
Reset function
disabled. Chiller
returns to normal set
point control.
Automatic
Faulty signal
generator, wiring
error, or faulty EMM.
Alert
4 to 20 mA Demand
Limit Input Failure
If configured with EMM and
input less than 2 mA or
greater than 22 mA
Demand limit function
disabled. Chiller
returns to 100%
demand limit
control.
Automatic
Faulty signal
generator, wiring
error, or faulty EMM.
T177
See legend on page 46.
43
Table 32 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE
T200
T201
A202
T203
T204
T205
T206
ALARM
OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
Alert
Cooler Flow/Interlock
Contacts failed to Close
at start-up
Cooler flow switch contacts
failed to close within
1 minute (if cooler pump
control is enabled) or
within 5 minutes (if cooler
pump control is not
enabled) after start-up
Alert
Cooler Flow/Interlock
Contacts Opened
During Normal
Operation
RESET
METHOD
PROBABLE
CAUSE
Chiller not allowed to
start. For models with
dual pumps, the
second pump will be
started if available
Manual
Faulty flow switch or
interlock.
Flow switch opens for at
least 3 seconds after
being initially closed
All compressors shut
down. For models with
dual pumps, the
second pump will be
started if available
Manual
Cooler pump failure,
faulty flow switch or
interlock.
Alarm
Cooler Pump Interlock
Closed When Pump is
Off
If configured for cooler
pump control and flow
switch input is closed for
5 minutes while pump
output(s) are off
Chiller not allowed to
start
Alert
Loss of Communication
with slave chiller
Master chiller MBB
loses communication
with slave chiller MBB
Dual chiller control
disabled. Chiller runs
as a stand-alone
machine.
Alert
Loss of Communication
with master chiller
Slave chiller MBB loses
communication with
master chiller MBB
Dual chiller control
disabled. Chiller runs
as a stand-alone
machine
Alert
Alert
ACTION TAKEN
BY CONTROL
Dual chiller routine
disabled. Master/slave
run as stand-alone
chillers.
Automatic when
aux contacts open
Wiring error, faulty
pump contactor
(welded contacts)
Automatic
Wiring error, faulty
wiring, failed Slave
chiller MBB module,
power loss at slave
chiller, wrong slave
address.
Automatic
Wiring error, faulty
wiring, failed master
chiller MBB module,
power loss at Master
chiller.
Automatic
CCN Address for
both chillers is the
same. Must be
different. Check
CCN.A under the
OPT2 sub-mode in
Configuration at both
chillers.
Automatic
Building load greater
than unit capacity,
low water/brine flow
or compressor fault.
Check for other
alarms/alerts.
Master and slave chiller
with same address
Master and slave chiller
have the same CCN
address (CCN.A)
High Leaving Chilled
Water Temperature
LWT read is greater than
LCW Alert Limit, Total
capacity is 100% and LWT
is greater than LWT
reading one minute ago
Alert only. No action
taken.
Both EWT and LWT
must be at least 6 F
(3.3 C) above Brine
Freeze point
(BR.FZ). Automatic
for first, Manual reset
there after.
Manual
A207
Alarm
Cooler Freeze
Protection
Cooler EWT or LWT is less
than Brine Freeze (BR.FZ)
Chiller shutdown
without going through
pumpdown. Cooler
pump continues to
run a minimum of
5 minutes (if control
enabled).
A208
Alarm
EWT or LWT
Thermistor failure
Cooler EWT is less than
LWT by 3° F (1.7° C) for
1 minute after a circuit is
started
Chiller shutdown.
Cooler pump shut off
(if control enabled).
A220
Alarm
Condenser Pump
Interlock Failure to
Close
at Start-Up
If configured for condenser pump interlock
and the flow switch
input fails to close within 5 minutes after startup. Also valid when
configured for condenser pump control.
Condenser and cooler
pumps shut off.
Chiller shutdown
Manual
Failure of condenser
pump or controls.
Wiring error.
A221
Alarm
Condenser Pump
Interlock Opened During
Normal Operation
If configured for condenser pump interlock
and the flow switch
opens for 15 seconds
during normal
operation (or when
the condenser pump
relay is on when condenser pump control
is configured.)
Condenser and cooler
pumps shut off. Chiller
shutdown
Manual
Failure of condenser
pump or controls.
Wiring error.
A222
Alarm
Condenser Pump
Interlock Closed When
Pump is Off
If configured for condenser pump interlock
condenser pump control, and the flow
switch is closed
when pump relay is off.
Chiller is not allowed to
start.
Manual
Failure of condenser
pump relays or interlocks, welded
contacts.
44
Faulty thermistor
(T1/T2), low water
flow.
Reverse flow faulty
thermistor, miswired
thermistor
Table 32 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE
ALARM
OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
Strainer Service
Countdown (S.T.DN)
expired. Complete strainer
blowdown and enter 'YES'
for Strainer Maintenance
Done (S.T.MN) item.
None
Automatic
PROBABLE
CAUSE
Routine strainer
maintenance
required
T302
Alert
Strainer Blowdown
Scheduled
Maintenance Due
T500
Alert
Current Sensor Board
A1 Failure
Alert occurs when CSB output is a constant high value
Compressor A1 shut
down
Automatic
T501
Alert
Current Sensor Board
A2 Failure
Alert occurs when CSB output is a constant high value
Compressor A2 shut
down
Automatic
T502
Alert
Current Sensor Board
A3 Failure
Alert occurs when CSB output is a constant high value
Compressor A3 shut
down
Automatic
T950
Alert
Loss of Communication
with Water System
Manager
No communications have
been received by the MBB
within 5 minutes of last
transmission
WSM forces removed.
Chiller runs under own
control
Automatic
Failed module, wiring
error, failed
transformer, loose
connection plug,
wrong address
T951
Alert
Loss of Communication
with Chillervisor System
Manager
No communications have
been received by the MBB
within 5 minutes of last
transmission
CSM forces removed.
Chiller runs under own
control
Automatic
Failed module, wiring
error, failed
transformer, loose
connection plug,
wrong address
CCN
CSB
CSM
EEPROM
EMM
EWT
LCW
LWT
MBB
SCT
TXV
WSM
—
—
—
—
—
—
—
—
—
—
—
—
CSB failure.
CSB failure.
CSB failure.
LEGEND
Carrier Comfort Network
Current Sensor Board
Chiller System Manager
Electronic Eraseable Programmable Read Only Memory
Energy Management Module
Entering Fluid Temperature
Leaving Chilled Water
Leaving Fluid Temperature
Main Base Board
Saturated Condenser Temperature
Thermostatic Expansion Valve
Water System Manager
COMPRESSOR FAILURE ALERTS
A048 (Circuit A Compressor Availability Alarm) — This
alarm occurs when two compressors are unavailable to run on
a 3 compressor circuit. The control ensures proper oil return by
ensuring a circuit does not operate with one compressor for
longer than one hour of cumulative run time.
T051, T052, T053 (Circuit A Compresser Failures) — Alert
codes 051, 052, and 053 are for compressors A1, A2, and A3
respectively. These alerts occur when the current sensor (CS)
does not detect compressor current during compressor operation. When this occurs, the control turns off the compressor.
If the current sensor board reads OFF while the compressor
relay has been commanded ON, an alert is generated.
POSSIBLE CAUSES
Compressor Overload — Either the compressor internal overload protector is open or the external overload protector (Kriwan module) has activated. The external overload protector
modules are mounted in the compressor wiring junction box.
Temperature sensors embedded in the compressor motor windings are the inputs to the module. The module is powered with
24 vac from the units main control box. The module output is a
normally closed contact that is wired in series with the compressor contactor coil. In a compressor motor overload condition, contact opens, deenergizing the compressor contactor.
Low Refrigerant Charge — If the compressor operates for an
extended period of time with low refrigerant charge, the compressor ASTP device will open, which will cause the compressor to trip on its overload protection device.
Circuit Breaker Trip — The compressors are protected from
short circuit by a breaker in the control box.
Wiring Error — A wiring error might not allow the compressor to start.
To check out alerts T051-T053:
1. Turn on the compressor in question using Service Test
mode. If the compressor does not start, then most likely
the problem is one of the following: HPS open, open internal protection, circuit breaker trip, incorrect safety wiring, or incorrect compressor wiring.
2. If the compressor does start, verify it is rotating in the correct direction.
IMPORTANT: Prolonged operation in the wrong direction
can damage the compressor. Correct rotation can be verified by a gage set and looking for a differential pressure
rise on start-up.
IMPORTANT: If the CS is always detecting current, verify
that the compressor is on. If the compressor is on, check
the contactor and the relay on the MBB. If the compressor
is off and there is no current, verify the CSB wiring and
replace if necessary.
IMPORTANT: Return to Normal mode and observe compressor operation to verify that compressor current sensor
is working.
COMPRESSOR STUCK ON FAILURE ALARMS
Circuit A A051, A052, A053 — Alarm codes 051, 052, and
053 are for compressors A1, A2, and A3. These alarms occur
when the CSB detects current when the compressor should be
off. When this occurs, the control turns off the compressor.
If the current sensor board reads ON while the compressor
relay has been commanded OFF for a period of 4 continuous
seconds, an alarm is generated. These alarms are only monitored for a period of 10 seconds after the compressor relay has
been commanded OFF. This is done to facilitate a service technician forcing a relay to test a compressor.
45
this alarm are loose wiring connection, sensor not located in
well or bad Schrader fitting. Reset is manual.
T079 (Dual Chiller Thermistor Failure) — This alert occurs
when the dual chiller temperature sensor is outside its range of
–40 to 240 F (–40 to 116 C). Failure of this thermistor will disable dual chiller operation and return to stand-alone operation.
The unit must be configured for dual chiller operation for this
alert to occur. The cause of the alert is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a
loose connection. Reset is automatic.
A090 (Circuit A Discharge Pressure Transducer Failure) —
This alarm occurs when the pressure is outside the range of 0.0
to 667.0 psig (0.0 to 4599 kPag). A circuit cannot run when this
alarm is active. Use the scrolling marquee to reset the alarm.
The cause of the alarm is usually a faulty transducer, faulty 5-v
power supply, or a loose connection.
A092 (Circuit A Suction Pressure Transducer Failure) —
This alarm occurs when the pressure is outside the range of 0.0
to 420.0 psig (0.0 to 2896 kPag). A circuit cannot run when this
alarm is active. Use the scrolling marquee to reset the alarm.
The cause of the alarm is usually a faulty transducer, faulty 5-v
power supply, or a loose connection.
T094 (Discharge Gas Thermistor Failure) — This alert occurs for units which have the digital compressor installed on
circuit A. If discharge gas temperature is open or shorted, the
circuit will be shut off. The valid range for this thermistor is –
39.9 to 356 F (–39.9 to 180 C). The alert will reset itself when
discharge temperature is less than 250 F (121.1 C). The cause
of the alert is usually low refrigerant charge or a faulty thermistor.
A110 (Circuit A Loss of Charge) — This alarm occurs when
the compressor is OFF and the discharge pressure is less than
26 psig (179.2 kPa).
A112 (Circuit A High Saturated Suction Temperature) —
Alarm code 112 occurs when compressors in a circuit have
been running for at least 5 minutes and the circuit saturated
suction temperature is greater than 70 F (21.1 C). The high saturated suction alarm is generated and the circuit is shut down.
A114 (Circuit A Low Superheat) — Alarm code 114 occurs
when the superheat of a circuit is less than 5 F (2.8 C) for 5
continuous minutes. The low superheat alarm is generated and
the circuit is shut down. The RGT sensor must be installed.
A116 (Circuit A Low Cooler Suction Temperature) —
Alarm code 116 occurs when mode 7 causes the compressor to
unload 3 consecutive times in less than 30-minute intervals between each circuit shutdown. The low cooler suction temperature alarm is generated and the circuit is shut down. If this condition is encountered, check the following items:
• check for a faulty expansion valve.
• check for a plugged filter drier.
• check for a low refrigerant charge condition.
• check the suction pressure transducer for accuracy.
• check the cooler flow rate.
• check the chilled water strainer for a restriction.
• consider a fouled cooler.
• check the glycol concentration in the loop; high glycol
concentrations can cause the same effect as a fouled
cooler.
• check that the water flow is in the proper direction.
A122 (Circuit A, High Pressure Switch Failure) — The
high-pressure switch is wired in series with the compressor
contactor coils of each compressor on the circuit to disable
compressor operation immediately upon a high discharge pressure condition. The normally closed contacts in the switches
are calibrated to open at 650 ± 10 psig (448.2 ± 68.9 kPag)
which corresponds to a saturated condensing temperature of
155.6 ± 1.3 F (68.7 ± 0.7 C). The pressure switches will automatically reset when the discharge pressure is reduced to 500 ±
In addition, if a compressor stuck failure occurs and the current sensor board reports the compressor and the request off,
certain diagnostics will take place as follows:
1. If any of the compressors are diagnosed as stuck on and
the current sensor board is on and the request is off, the
control will command the condenser fans to maintain
normal head pressure.
2. The control will shut-off all other compressors.
The possible causes include welded contactor or frozen
compressor relay on the MBB.
To check out alarms A051 to A053:
1. Place the unit in Service Test mode. All compressors
should be off.
2. Verify that there is not 24-v at the contactor coil. If there
is 24 v at the contactor, check relay on MBB and wiring.
3. Check for welded contactor.
4. Verify CSB wiring.
5. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working
and condenser fans are energized.
A060 (Cooler Leaving Fluid Thermistor Failure) — The
sensor reading is outside the range of –40 to 240 F (–40 to
116 C) then the alarm will occur. The cause of the alarm is usually a faulty thermistor, a shorted or open thermistor caused by
a wiring error, or a loose connection. Failure of this thermistor
will shut down the entire unit.
A061 (Cooler Entering Thermistor Failure) — If the sensor
reading is outside the range of –40 to 240 F (–40 to 116 C) then
the alarm will occur. The cause of the alarm is usually a faulty
thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection. Failure of this thermistor will shut
down the entire unit.
T062 (Condenser Leaving Fluid Thermistor Failure) — The
sensor reading is outside the range of –40 to 240 F (–40 to
116 C) then the alert will occur. The cause of the alert is usually
a faulty thermistor, a shorted or open thermistor caused by a
wiring error, or a loose connection. Failure of this thermistor
will send out an alert only.
T063 (Condenser Entering Thermistor Failure) — If the sensor reading is outside the range of –40 to 240 F (–40 to 116 C)
then the alert will occur. The cause of the alert is usually a
faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection. Failure of this thermistor will
send out an alert only.
T068 (Circuit A Compressor Return Gas Temperature
Thermistor Failure) — This alert occurs if the RGT is configured and the compressor return gas temperature sensor is outside the range of –40 to 240 F (–40 to 116 C). Failure of this
thermistor will shut down the appropriate circuit.
T073 (Outside Air Temperature Thermistor Failure) — This
alert occurs when the outside air temperature sensor is outside
the range of –40 to 240 F (–40 to 116 C). Failure of this thermistor will disable any elements of the control which requires its
use. The OAT must be configured.
T074 (Space Temperature Thermistor Failure) — This alert
occurs when the space temperature sensor is outside the range
of –40 to 240 F (–40 to 116 C). Failure of this thermistor will
disable any elements of the control which requires its use. The
cause of the alert is usually a faulty thermistor in the T55 or
T58 device, a shorted or open thermistor caused by a wiring error, or a loose connection. The SPT must be configured.
A077 (Circuit Saturated Suction Temperature Exceeds
Cooler Leaving Water Temperature) — This alarm occurs
when the saturated suction temperature (SST) is greater than
leaving water for 5 minutes. This alarm will occur if either the
suction pressure transducer reading, which is used to calculate
SST, or cooler leaving water is incorrect. Potential causes for
46
2. The rate of suction pressure change from 5 seconds before the compressor is brought on to when the compressor is brought on is calculated.
3. The rate of suction pressure change from when the
compressor is brought on to 5 seconds afterwards is
calculated.
4. With the above information, the test for reverse rotation is
made. If the suction pressure change 5 seconds after compression is greater than the suction pressure change 5 seconds before compression – 1.25, then there is a reverse
rotation error.
This alarm will disable mechanical cooling and will require
manual reset. This alarm may be disabled once the reverse rotation check has been verified by setting ConfigurationSERVREV.R = DSBL.
A150 (Unit is in Emergency Stop) — If the CCN emergency
stop command is received, the alarm is generated and the unit
will be immediately stopped.
If the CCN point name "EMSTOP" in the system table is set
to emergency stop, the unit will shut down immediately and
broadcast an alarm back to the CCN, indicating that the unit is
down. This alarm will clear when the variable is set back to
"enable."
A151 (Illegal Configuration) — An A151 alarm indicates an
invalid configuration has been entered. The following are illegal configurations.
• Invalid unit size has been entered.
• Unit configuration set to invalid type.
A152 (Unit Down Due to Failure) — Reset is automatic
when all alarms are cleared. This alarm indicates the unit is at
0% capacity.
T153 (Real Time Clock Hardware Failure) — A problem
has been detected with MBB real time clock hardware. Try resetting the power and check the indicator lights. If the alert continues, the board should be replaced.
A154 (Serial EEPROM Hardware Failure) — A problem
has been detected with the EEPROM on the MBB. Try
resetting the power and check the indicator lights. If the alarm
continues, the board should be replaced.
T155 (Serial EEPROM Storage Failure Error) — A problem
has been detected with the EEPROM storage on the MBB. Try
resetting the power and check the indicator lights. If the alert
continues, the board should be replaced.
A156 (Critical Serial EEPROM Storage Failure Error) — A
problem has been detected with the EEPROM storage on the
MBB. Try resetting the power and check the indicator lights. If
the alarm continues, the board should be replaced.
A157 (A/D Hardware Failure) — A problem has been detected with A/D conversion on the boards. Try resetting the power
and check the indicator lights. If the alarm continues, the board
should be replaced.
T173 (Energy Management Module Communication Failure) — This alert indicates that there are communications
problems with the energy management. All functions performed by the EMM will stop, which can include demand limit, reset and capacity input. The alert will automatically reset.
T174 (4 to 20 mA Cooling Set point Input Failure) — This
alert indicates a problem has been detected with cooling set
point 4 to 20 mA input. The input value is either less than 2 mA
or greater than 22 mA.
T175 (Loss of Communication with the AUX Board)
—
This alert will be generated when the Main Base Board (MBB)
loses communication with the AUX Board. The digital control
option will be disabled while this alert is active. The chiller
continues to run without Digital Compressor Control. The alert
will reset automatically if communication is re-established or
15 psig (3448 ± 103.4 kPag) which corresponds to a saturated
condensing temperature of 134.1 ± 2.4 F (56.7 ± 1.3 C).
The output of the high-pressure switch is wired to inputs on
the MBB to provide the control with an indication of a high
pressure switch trip. This alert could occur when compressors
are off if the wiring to the switch is broken or the switch has
failed open.
If the high-pressure switch trips on a circuit with compressors commanded on, the discharge pressure is recorded. If the
recorded discharge pressure is between 630 to 660 psig (4344
to 4451 kPa) (saturated condensing temperature between 153.0
and 156.9 F) (67.2 and 69.5 C), and is also less than the value
recorded on any previous high-pressure switch trip, the upper
horizontal portion of the compressor operating envelope (see
Fig. 12) is lowered 0.4 F (3 psig) (0.22 C [20.7 kPa]). The control will not allow the compressor operating envelope to be
lowered below 153.0 F (630 psig) (67.2 C [4344 kPa]).
This is done to make a rough calibration of the high pressure switch trip point. In most cases this allows the control to
detect a high head pressure condition prior to reaching the high
pressure switch trip point.
When the trip occurs, all mechanical cooling on the circuit
is shut down for 15 minutes. After 15 minutes, the circuit is allowed to restart.
A126 (Circuit A High Head Pressure) — This alarm occurs
when the appropriate saturated condensing temperature is
greater than the operating envelope shown in Fig 12. Prior to
the alarm, the control will shut down one compressor on a circuit if that circuit's saturated condensing temperature is greater
than the maximum SCT minus 5° F (2.7° C). If SCT continues
to rise to greater than the maximum SCT, the alarm will occur
and the circuit's remaining compressor will shut down. The
cause of the alarm is usually an overcharged system, high outdoor ambient temperature coupled with dirty outdoor coil
(30MPA only), plugged filter drier, a faulty high-pressure
switch, or loss of condenser water flow.
T133 (Circuit A Low Suction Pressure) — This alert indicates that after the compressor has been running for 1 minute
one of the following has occured: suction pressure is below
34 psig (234 kPa), saturated suction temperature is less than
12 F (–24.4 C) for 8 seconds or the suction presure falls below
23 psig (158 kPa), saturated temperature is less than –18 F
(–27.8 C). The Circuit A low suction pressure alert occurs and
the circuit is shut down. The reset function will occur automatically for the first daily occurance and manually (MBB) for
each reoccurance.
If this condition is encountered, check the following items:
• Check the unit refrigeration charge, a low charge condition can cause low suction pressures.
• Check the TXV operation.
• Check the liquid line service valve to be sure that it is
fully open.
• Check the liquid line filter drier for a restriction.
• Check the head pressure control device. For 30MPA
units, check the remote condenser to be sure that it is
operating correctly. If the remote condenser does not
have head pressure control, consider adding it. For
30MPW units, check the condenser water regulating
valve for proper operation. If the unit does not have head
pressure control, consider adding one, or adjusting the
loop temperature.
A140 (Reverse Rotation Detected) — A test is made once, on
power up, for suction pressure change on the first activated circuit. The unit control determines failure as follows:
1. The suction pressure is sampled 5 seconds before the
compressor is brought on, right when the compressor is
brought on and 5 seconds afterwards.
47
• Check the pump contactor for proper operation.
• Check the chilled water pump for proper operation.
Look for overload trips.
• Check the chilled water strainer for a restriction.
• Check to be sure that all isolation valves are open
completely.
A202 (Cooler Pump Interlock Closed When Pump Is Off
Alarm) — This alarm will be generated if the unit is configured for CPC=ON Cooler Pump Control, (Configuration→OPT1) without a call for the Chilled Water Pump,
C.LWP=OFF (Outputs→GEN.O) and the chilled water switch
is closed, FLOW=ON Cooler Flow Switch (Inputs→GEN.I)
for 5 minutes. When this alarm is generated the chiller is not allowed to start.
If this condition is encountered, check the following items:
• Check for a wiring error for the chilled water flow
switch, the chilled water flow switch's connection to the
MBB or a wiring error to the chilled water pump.
• Check to see if the chilled water pump control has been
manually bypassed.
• Check for a faulty or grounded chilled water flow switch.
• Check chilled water pump contactor for welded contacts.
T203 (Loss of Communication with the Slave Chiller Alert)
— This alert will be generated if Dual Chiller Control is enabled, LLEN=ENBL Lead/Lag Chiller Enable (Configuration→RSET), the chiller has been configured to be the Master
Chiller MSSL=MAST Master/Slave Select (Configuration→RSET) and it has not established or lost communication
with the Slave Chiller. When this alert is generated the dual
chiller control will be disabled and the unit will operate in
stand-alone mode.
If this condition is encountered, check the following items:
• Check the communication wiring between the two chillers is proper and is not grounded.
• Check to be sure that both the Master and Slave Chillers
are on the same bus, CCNB CCN Bus Number (Configuration→CCN).
• Check to be sure that the slave chiller address CCNA
CCN Address (Configuration→CCN) matches what is
programmed in the master chiller's configuration for
slave address. SLVA Slave Address (Configuration→RSET).
• Check for power at the slave chiller. If power is not present, this alarm will be generated.
• Check for a faulty master or slave MBB. If CCN communications is not working, this alarm will be generated.
T204 (Loss of Communication with the Master Chiller
Alert) — This alert will be generated if Dual Chiller Control is
enabled, LLEN=ENBL Lead/Lag Chiller Enable (Configuration→RSET), the chiller has been configured to be the Slave
Chiller MSSL=SLVE Master/Slave Select (Configuration→RSET) and it has not established or lost communication
with the Master Chiller. When this alert is generated the dual
chiller control will be disabled and the unit will operate in
stand-alone mode.
If this condition is encountered, check the following items:
• Check the communication wiring between the two chillers is proper and is not grounded.
• Check to be sure that both the master and slave chillers
are on the same bus, CCNB CCN Bus Number (Configuration→CCN).
• Check to be sure that the slave chiller address CCNA
CCN Address (Configuration→CCN) matches what is
programmed in the master chiller's configuration for
slave address. SLVA Slave Address (Configuration→RSET).
• Check for power at the master chiller. If power is not
present, this alarm will be generated.
the unit configuration for digital control, A1.TY Compressor
A1 Digital?→(Configuration Mode→UNIT) = NO.
If this condition is encountered, check the following items:
• Check for a wiring error.
• Check for a faulty communication bus, or no connection
to the AUX Board.
• Check the AUX Board
• If the unit it is configured for digital control, A1.TY
Compressor A1 Digital?→(Configuration Mode→UNIT)
is YES, but the unit is not a Digital Capacity machine,
(no digital compressor or AUX Board), this alarm will be
generated.
T176 (4 to 20 mA Reset Input Failure) — This alert indicates a problem has been detected with reset 4 to 20 mA input.
The input value is either less than 2 mA or greater than 22 mA.
The reset function will be disabled when this occurs.
T177 (4 to 20 mA Demand Limit Input Failure) — This
alert indicates a problem has been detected with demand limit
4 to 20 mA input. The input value is either less than 2 mA or
greater than 22 mA. The reset function will be disabled when
this occurs.
T200 (Cooler Flow Interlock Contacts Failed to Close at
Start-Up Alert) — This alert indicates the cooler flow switch
interlock contacts failed to close within 1 minute, if cooler
pump control is enabled or within 5 minutes, if cooler pump
control is not enabled after start-up. If the unit is equipped with
dual pumps, the second pump will be started and time allowed
to prove flow before the unit is alarmed. The cooler flow/cooler
pump interlock contacts failed to close at start-up alert is generated and the chiller is not allowed to start.
If this condition is encountered, check the following items:
• Check the chilled water flow switch for proper operation.
• Check the flow switch cable for power and control.
• Check the chilled water loop to be sure that it is completely filled with water, and all air has been purged.
• Check the chilled water pump interlock circuit for proper
operation.
• Check the pump electrical circuit for power.
• Check the pump circuit breaker.
• Check the pump contactor for proper operation.
• Check the chilled water pump for proper operation.
Look for overload trips.
• Check the chilled water strainer for a restriction.
• Check to be sure that all isolation valves are open completely.
P201 (Cooler Flow/Interlock Contacts Opened During Normal Operation Pre-alarm)
T201 (Cooler Flow/Interlock Contacts Opened During Normal Operation Alert) — This alert will be generated for the
appropriate pump if the chilled water flow switch opens for at
least three (3) seconds after initially being closed, and an P201
- Cooler Flow/Interlock Contacts Opened During Normal Operation Alarm will be generated and the machine will stop. If
available, the other pump will be started. If flow is proven, the
machine will be allowed to restart. If after 5 minutes, the cooler flow switch/interlock contacts do not close, the alarm will
change to a T201 - Cooler Flow/Interlock Contacts Opened
During Normal Operation Alert. When this alert is generated
the chiller is shut down.
If this condition is encountered, check the following items:
• Check the chilled water flow switch for proper operation.
• Check the flow switch cable for power and control.
• Check the chilled water loop to be sure that it is
completely filled with water, and all air has been purged.
• Check the chilled water pump interlock circuit for proper
operation.
• Check the pump electrical circuit for power.
• Check the pump circuit breaker.
48
• Check the entering and leaving water thermistors for
accuracy.
• Check to be sure the entering and leaving water thermistors are correctly wired and installed in the proper location.
A220 (Condenser Pump Interlock Failure to Close At StartUp Alarm) — This alarm will be generated if the unit is configured for D.FL.S=ENBL Enable Cond Flow Switch (Configuration→OPT1) and condenser flow interlock (if used) circuit fails to close within 5 minutes of the condenser pump start.
When this alarm is generated the chiller is prevented from
starting or will be shut down; condenser and chilled water
pumps are shut down.
If this condition is encountered, check the following items:
• Check for a condenser pump failure.
• Check for power at the condenser pump.
• Check condenser pump control wiring
• Check condenser strainer for a restriction. Flush or
replace as necessary.
• Check the condenser water flow switch operation.
• Check condenser water flow switch wiring.
• If the unit utilizes a flow regulating valve for head pressure control, consider disabling condenser flow switch
feature.
A221 (Condenser Pump Interlock Opened During Normal
Operation Alarm) — If the unit is configured for D.FL.S=
ENBL Enable Cond Flow Switch (Configuration→OPT1) and
condenser flow interlock (if used) circuit was established and
opens for 15 seconds. When this alarm is generated the chiller
is prevented from starting or will be shut down; condenser and
chilled water pumps are shut down.
If this condition is encountered, check the following items:
• Check for a condenser pump failure.
• Check for power at the condenser pump.
• Check condenser pump control wiring
• Check condenser strainer for a restriction. Flush or
replace as necessary.
• Check the condenser water flow switch operation.
• Check condenser water flow switch wiring.
• If the unit utilizes a flow regulating valve for head pressure control, consider disabling this feature.
A222 (Condenser Pump Interlock Closed When Pump is
Off Alarm) — If the unit is configured for Condenser Pump
Control, D.PM.E Enable Condenser Pump (Configuration→OPT1) is 1 (On when Occupied) or 2 (On with Compressor), the Condenser Flow Switch is enabled, D.FL.S=ENBL
Enable Cond Flow Switch (Configuration→OPT1) and condenser flow interlock (if used) circuit is closed while the pump
is commanded off, this alarm will be generated. When this
alarm is generated the chiller is prevented from starting.
If this condition is encountered, check the following items:
• Check for a welded condenser pump contactor.
• Check for a faulty condenser pump relay
• Check for a wiring error.
T302 (Strainer Blowdown Scheduled Maintenance Due) —
This alert is generated when the S.T.DN Strainer Service
Countdown (Run Status→PM) has expired. Be sure date is correctly set: MNTH Month of Year, DAY Day of Month, and
YEAR Year of Century (Time Clock→DATE). Complete the
strainer blowdown. Set S.T.MN Strainer Maintenance Done
(Run Status→PM) to YES. Then reset the alert.
If this condition is encountered, check the following item:
• Strainer maintenance is required.
T500, T501, T502 (Current Sensor Board Failure — A xx
Circuit A — Alert codes 500, 501, and 502 are for compressors A1, A2, and A3 respectively. These alerts occur when the
output of the CSB is a constant high value. These alerts reset
• Check for a faulty master or slave MBB. If CCN communications is not working, this alarm will be generated.
T205 (Master and Slave Chiller with Same Address Alert)
— This alert will be generated if Dual Chiller Control is enabled, LLEN=ENBL Lead/Lag Chiller Enable (Configuration→RSET), the chiller has been configured to be the Master
Chiller MSSL=MAST Master/Slave Select (Configuration→RSET) and both the master chiller and slave chiller have
the same address, CCNA CCN Address (Configuration→CCN). When this alert is generated the dual chiller control will be disabled and both units, master and slave, will operate in stand-alone mode.
If this condition is encountered, check to be sure that the
Slave Chiller address CCNA CCN Address (Configuration→CCN) matches what is programmed in the Master Chiller's configuration for slave address. SLVA Slave Address
(Configuration→RSET).
T206 (High Leaving Chilled Water Temperature Alert) —
The criterion for this alert is checked when the unit is ON and
the total available capacity is 100%. The alert is generated
when the leaving chilled water temperature is greater than the
LCWT, High LCW Alert Limit (Configuration→OPT2) plus
the control point and the leaving chilled water temperature is
higher than it was 1 minute before the current reading. The
LCWT is a delta temperature, not an absolute value. The alert
will automatically reset when the leaving water temperature is
less than the control point, or is less than the control point plus
LCWT minus 5°F (2.8°C).
If this condition is encountered:
• Check building load.
• Check the LCWT, High LCW Alert Limit (Configuration→OPT2) value.
• Check compressor operation.
• Check water flow.
A207 (Cooler Freeze Protection Alarm) — This alarm will
be generated when the leaving water temperature is below
BR.FZ, Brine Freeze Point (Set Point Mode→FRZ). When
this condition is encountered, the machine will enter Mode 16,
and the Chilled Water Pump relay will be energized, even if the
CPC Cooler Pump Control (Configuration Mode→OPT1) is
OFF. If the machine is equipped with a pump, the pump will
run for a minimum of 5 minutes. The unit will be shut down or
prevented from starting.
The control will allow the machine to reset automatically if
the leaving chilled water temperature rises above the BR.FZ
Brine Freeze Point (Set Point Mode→FRZ) plus 6°F (3.3°C).
If the alarm is generated again during the same day, it shall be a
manual reset.
If this condition is encountered, check the following items:
• Check the entering or leaving water thermistor for accuracy.
• Check water flow rate.
• Check for freezing conditions.
• Check the heat tape and other freeze protection means
for proper operation.
• Check glycol concentration and adjust BR.FZ accordingly.
A208 (EWT or LWT Thermistor Failure Alarm) — This
alarm will be generated if the entering water temperature, EWT
Entering Fluid Temp (Run Status→VIEW) is less than the
leaving water temperature, LWT Leaving Fluid Temp (Run
Status→VIEW) by 3°F (1.7°C) or more for 1 minute after the
circuit has started. When this alarm is generated the chiller is
shut down and prevented from starting. Chilled water pump is
also shut down.
If this condition is encountered, check the following items:
• Check for a correct chilled water flow.
49
T951 (Loss of Communication with Chillervisor System
Manager) — This alarm will be generated if no communications have been received by the Main Base Board for five (5)
minutes. When this alert is generated the Chillervisor System
Manager (CSM) forces are removed, and chiller runs in standalone mode.
If this condition is encountered, check the following items:
• Check CCN wiring.
• Check for power at the Chillervisor System Manager.
• Check Main Base Board for a communication failure.
automatically. If the problem cannot be resolved, the CSB must
be replaced.
T950 (Loss of Communication with Water System Manager) — This alert will be generated if no communications
have been received by the Main Base Board for five (5) minutes. When this occurs the Water System Manager (WSM)
forces are removed. The chiller runs in stand-alone mode.
If this condition is encountered, check the following items:
• Check CCN wiring.
• Check for power at the water system manager.
• Check Main Base Board for a communication failure.
50
APPENDIX A — LOCAL DISPLAY TABLES
Run Status Mode and Sub-Mode Directory
ITEM
VIEW
EWT
LWT
SETP
CTPT
LOD.F
STAT
OCC
MODE
CAP
DEM.L
STGE
ALRM
TIME
MNTH
EXPANSION
AUTO VIEW OF RUN STATUS
Entering Fluid Temp
Leaving Fluid Temp
Active Setpoint
Control Point
Load/Unload Factor
Control Mode
Occupied
Override Modes in Effect
Percent Total Capacity
Active Demand Limit
Requested Stage
Current Alarms and Alerts
Time of Day
Month of Year
DATE
YEAR
Day of Month
Year of Century
UNIT RUN HOUR AND START
Machine Operating Hours
Machine Starts
Cooler Pump Run Hours
Condenser Pump Run Hours
CIRC AND COMP RUN HOURS
Compressor A1 Run Hours
Compressor A2 Run Hours
Compressor A3 Run Hours
COMPRESSOR STARTS
Compressor A1 Starts
Compressor A2 Starts
Compressor A3 Starts
PREVENTIVE MAINTENANCE
STRAINER MAINTENANCE
Strainer Srvc Interval
Strainer Srvc Countdown
Strainer Maint. Done
STRAINER MAINT. DATES
RUN
HRS.U
STR.U
HR.P1
HR.P2
HOUR
HR.A1
HR.A2
HR.A3
STRT
ST.A1
ST.A2
ST.A3
PM
STRN
STRNSI.ST
STRNS.T.DN
STRNS.T.MN
ST.DT
ST.DTS.T.M0
ST.DTS.T.M1
ST.DTS.T.M2
ST.DTS.T.M3
ST.DTS.T.M4
VERS
MBB
AUX1*
EMM*
MARQ
NAVI*
RANGE
UNITS
xxx.x °F (°C)
xxx.x °F (°C)
xxx.x °F
xxx.x °F
xxx
x
NO/YES
NO/YES
xxx
CCN POINT
x
xxx
xx.xx
xx
EWT
LWT
SP
CTRL_PNT
SMZ
STAT
OCC
MODE
CAP_T
DEM_LIM
STAGE
ALRMALRT
TIMECOPY
MOY
xx
xx
DOM
YOCDISP
0 to 999999
0 to 1000000
0 to 999999.9
0 to 999999.9
xxxx HRS
xxxx
xxxx HRS
xxxx HRS
HR_MACH
CY_MACH
HR_CPUMP
HR_DPUMP
0 to 999999
0 to 999999
0 to 999999
xxxx HRS
xxxx HRS
xxxx HRS
HOURS_A1
HOURS_A2
HOURS_A3
0 to 999999
0 to 999999
0 to 999999
xxxx
xxxx
xxxx
CY_A1
CY_A2
CY_A3
0 to 65535
0 to 65535
xxxx HRS
xxxx HRS
NO/YES
SI_STRNR
ST_CDOWN
ST_MAINT
00:00-23:59
1 - 12
(1 = January,
2 = February, etc.)
01-31
COMMENT
Default: 8760
MM/DD/YY HH:MM
MM/DD/YY HH:MM
MM/DD/YY HH:MM
MM/DD/YY HH:MM
MM/DD/YY HH:MM
SOFTWARE VERSION NUMBERS
CESR131482-xx-xx
CESR131333-xx-xx
CESR131174-xx-xx
CESR131171-xx-xx
CESR130227-xx-xx
* If these devices are not installed, they will not show in the table.
Service Test Mode and Sub-Mode Directory
ITEM
TEST
EXPANSION
SERVICE TEST MODE
OUTS
CLR.P
CND.P
UL.TM
CC.H
CW.VO
CW.VC
LL.SV
RMT.A
CMPA
CC.A1
UL.TM
CC.A2
CC.A3
MLV
OUTPUTS AND PUMPS
Cooler Pump Relay
Condenser Pump
Comp A1 Unload Time
Crankcase Heater
Condenser Valve Open
Condenser Valve Close
Liquid Line Solenoid
Remote Alarm Relay
CIRCUIT 1 COMPRESSOR TST
Compressor A1 Relay
Comp A1 Unload Time
Compressor A2 Relay
Compressor A3 Relay
Minimum Load Valve Relay
RANGE
0 to 15
0 to 15
UNITS
OFF/ON
CCN POINT
MAN_CTRL
OFF/ON
OFF/ON
xx
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
S_CLPMP
S_CNDPMP
S_A1ULTM
S_CCH
S_CWVO
S_CWVC
S_LLSV
S_ALM
OFF/ON
xx
OFF/ON
OFF/ON
OFF/ON
S_A1_RLY
S_A1ULTM
S_A2_RLY
S_A3_RLY
S_MLV
51
COMMENT
To enable Service Test
mode, move Enable/Off/
Remote contact switch to
OFF. Change TEST to
ON. Move switch to
ENABLE.
not supported
not supported
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Temperature Mode and Sub-Mode Directory
ITEM
UNIT
CEWT
CLWT
CDET
CDLT
OAT
SPT
DLWT
CIR.A
SCT.A
SST.A
RGT.A
D.GAS
SH.A
EXPANSION
ENT AND LEAVE UNIT TEMPS
Cooler Entering Fluid
Cooler Leaving Fluid
Condenser Entering Fluid
Condenser Leaving Fluid
Outside Air Temperature
Space Temperature
Lead/Lag Leaving Fluid
TEMPERATURES CIRCUIT A
Saturated Condensing Tmp
Saturated Suction Temp
Compr Return Gas Temp
Discharge Gas Temp
Suction Superheat Temp
UNITS
CCN POINT
xxx.x °F
xxx.x °F
xxx.x °F
xxx.x °F
xxx.x °F
xxx.x °F
xxx.x °F
COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
OAT
SPT
DUAL_LWT
xxx.x °F
xxx.x °F
xxx.x °F
xxx.x °F
xxx.x ΔF
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A
COMMENT
Pressures Mode and Sub-Mode Directory
ITEM
PRC.A
DP.A
SP.A
EXPANSION
PRESSURES CIRCUIT A
Discharge Pressure
Suction Pressure
UNITS
CCN POINT
xxx.x PSIG
xxx.x PSIG
COMMENT
DP_A
SP_A
Set Points Mode and Sub-Mode Directory
ITEM
COOL
CSP.1
EXPANSION
COOLING SETPOINTS
Cooling Setpoint 1
CSP.2
Cooling Setpoint 2
CSP.2
ICE Setpoint
HEAD
H.DP
HEAD PRESSURE SETPOINTS
Head Setpoint
85 to 120°F
(29.4 to 48.9°C)
BRINE FREEZE SETPOINT
Brine Freeze Point
–20 to 34°F
(–28.9 to 1.1°C)
FRZ
BR.FZ
RANGE
UNITS
–20 to 70°F
(–28.9 to 21.1°C)
–20 to 70°F
(–28.9 to 21.1°C)
–20 to 32°F
(–28.9 to 0.0°C)
CCN POINT
DEFAULT
xxx.x °F
CSP1
44°F
(6.6°C)
44°F
(6.6°C)
32°F
(0°C)
xxx.x °F
CSP2
xxx.x °F
CSP3
xxx.x °F
HSP
95°F
(35°C)
xxx.x °F
BRN_FRZ
34°F
(1.1°C)
Inputs Mode and Sub-Mode Directory
ITEM
GEN.I
STST
FLOW
CD.FL
DLS1
DLS2
ICED
DUAL
CRCT
FKA1
FKA2
FKA3
HPS.A
4-20
DMND
A.DL
RSET
D.RST
CSP
EXPANSION
GENERAL INPUTS
Start/Stop Switch
Cooler Flow Switch
Condenser Flow Switch
Demand Limit Switch 1
Demand Limit Switch 2
Ice Done
Dual Setpoint Switch
CIRCUIT INPUTS
Compressor A1 Feedback
Compressor A2 Feedback
Compressor A3 Feedback
High Pressure Switch A
4-20 MA INPUTS
4-20 ma Demand Signal
Active Demand Limit
4-20 ma Reset Signal
Degrees of Reset
4-20 ma Cooling Setpoint
UNITS
CCN POINT
STRT/STOP
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
START
COOLFLOW
CONDFLOW
DMD_SW1
DMD_SW2
ICE_DONE
DUAL_IN
OFF/ON
OFF/ON
OFF/ON
OFF/ON
K_A1_FBK
K_A2_FBK
K_A3_FBK
HPSA
xx.x
LMT_MA
DEM_LIM
RST_MA
DEG_RST
CSP_IN
xx.x
xx.x
COMMENT
Outputs Mode and Sub-Mode Directory
ITEM
GEN.O
C.LWP
C.DWP
ALRM
CD.W.O*
CD.W.C*
CIR.A
CC.A1
D.PER
CC.A2
CC.A3
CCH
LLSV
MLV.R
EXPANSION
GENERAL OUTPUTS
Cooler Pump Relay
Condenser Pump
Alarm State
Condenser Valve Open
Condenser Valve Close
OUTPUTS CIRCUIT A
Compressor A1 Relay
Compressor A1 Load Percent
Compressor A2 Relay
Compressor A3 Relay
Crankcase Heater Relay
Liquid Line Solenoid
Minimum Load Valve Relay
UNITS
CCN POINT
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
COOLPUMP
CONDPUMP
ALM
COND_WVO
COND_WVC
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
K_A1_RLY
DIGITALP
K_A2_RLY
K_A3_RLY
CCH_RLY
LLSV_A
MLV_RLY
* Not supported.
52
COMMENT
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Configuration Mode and Sub-Mode Directory
ITEM
DISP
TEST
METR
EXPANSION
DISPLAY CONFIGURATION
Test Display LEDs
Metric Display
LANG
Language Selection
PAS.E
PASS
UNIT
TYPE
Password Enable
Service Password
UNIT CONFIGURATION
Unit Type
SIZE
SZA.1
Unit Size
Compressor A1 Size
SZA.2
Compressor A2 Size
SZA.3
Compressor A3 Size
A1.TY
MAX.T
Compressor A1 Digital?
Maximum A1 Unload Time
OPT1
FLUD
UNIT OPTIONS 1 HARDWARE
Cooler Fluid
MLV.S
RG.EN
OAT.E
CSB.E
CPC
PM.DY
D.PM.E
Minimum Load Vlv Select
Return Gas Sensor Enable
Enable OAT Sensor
CSB Boards Enable
Cooler Pump Control
Cooler Pump Shutdown Dly
Enable Condenser Pump
D.FL.S
CDWS
OPT2
CTRL
Enable Cond Flow Switch
Enable Cond Wtr Sensors
UNIT OPTIONS 2 CONTROLS
Control Method
LCWT
High LCW Alert Limit
DELY
ICE.M
Minutes Off Time
Ice Mode Enable
CCN
CCN NETWORK CONFIGS
CCN Address
CCN Bus Number
CCN Baud Rate
CCNA
CCNB
BAUD
RANGE
UNITS
OFF/ON
OFF = English
ON = Metric
0 = English
1 = Espanol
2 = Francais
3 = Portuguese
DSBL/ENBL
0 to 9999
CCN POINT
DEFAULT
DISPTEST
DISPUNIT
OFF = English
X
LANGUAGE
0
XXXX
PASS_EBL
PASSCOPY
ENBL
1111
2=Air Cooled,
3=Water Cooled
15 to 45
Unit Size Dependent
Unit Size Dependent
Unit Size Dependent
NO/YES
0 to 15
X
UNIT_TYP
XXX
XX
SIZE
SIZE_A1
XX
SIZE_A2
XX
SIZE_A3
XX
CPA1TYPE
MAXULTME
1 = Water
2 = Medium Temp
Brine
NO/YES
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
OFF/ON
0 to 10
0=No Control
1=On When Occupied
2=On with Compressors
DSBL/ENBL
DSBL/ENBL
X
FLUIDTYP
1 = Water
NO
XX MIN
X
MLV_FLG
RGT_ENA
OAT_ENA
CSB_ENA
CPC
PUMP_DLY
CONDPMPE
ON
1 MIN
0=No Control
CONDFLSW
CONDWTRS
DSBL
DSBL
0=Switch
1=Occupancy
2=Occupancy
3=CCN
2 to 60°F
(1.1 to 33.3°C)
0 to 15
DSBL/ENBL
(Requires EMM)
X
CONTROL
0=Switch
XX
LCW_LMT
60°F (33.3°C)
XX
DELAY
ICE_CNFG
0
DSBL
1 to 239
0 to 239
1 = 2400
2 = 4800
3 = 9600
4 =19,200
5 =38,400
XXX
XXX
X
CCNADD
CCNBUS
CCNBAUDD
1
0
3 = 9600
53
7 (040,045)
10 (015,020,030)
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Configuration Mode and Sub-Mode Directory (cont)
ITEM
RSET
CRST
EXPANSION
RESET COOL TEMP
Cooling Reset Type
MA.DG
4-20 - Degrees Reset
RM.NO
Remote - No Reset Temp
RM.F
Remote - Full Reset Temp
RM.DG
Remote - Degrees Reset
RT.NO
Return - No Reset Temp
RT.F
Return - Full Reset Temp
RT.DG
Return - Degrees Reset
DMDC
Demand Limit Select
DM20
SHNM
SHDL
SHTM
DLS1
DLS2
LLEN
MSSL
SLVA
LLBL
Demand Limit at 20 mA
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time
Demand Limit Switch 1
Demand Limit Switch 2
Lead/Lag Chiller Enable
Master/Slave Select
Slave Address
Lead/Lag Balance Select
LLBD
LLDY
PARA
Lead/Lag Balance Delta
Lag Start Delay
Parallel Configuration
SETPOINT AND RAMP LOAD
Cooling Set Point Select
SLCT
CLSP
RL.S
CRMP
SCHD
Z.GN
SERV
EN.A1
EN.A2
EN.A3
REV.R
BCST
T.D.BC
OAT.B
G.S.BC
BC.AK
Ramp Load Select
Cooling Ramp Loading
Schedule Number
Deadband Multiplier
SERVICE CONFIGURATION
Enable Compressor A1
Enable Compressor A2
Enable Compressor A3
Reverse Rotation Enable
BROADCAST CONFIGURATION
CCN Time/Date Broadcast
CCN OAT Broadcast
Global Schedule Broadcst
CCN Broadcast Ack'er
RANGE
UNITS
CCN POINT
DEFAULT
X
CRST_TYP
0 = No Reset
XX.XΔF
MA_DEG
10.0F( 5.5C)
XXX.X °F
REM_NO
10.0F (–23.3C)
XXX.X °F
REM_FULL
0.0F (–17.8C)
XX.X ΔF
REM_DEG
0.0F (0.0C)
XXX.XΔF
RTN_NO
10F (5.5C)
XXX.XΔF
RTN_FULL
0.0F (0.0C)
XX.XΔF
RTN_DEG
0.0F (0.0C)
X
DMD_CTRL
0 = None
XXX%
XXX
XXX%
XXX
XXX%
XXX%
DMT20MA
SHED_NUM
SHED_DEL
SHED_TIM
DLSWSP1
DLSWSP2
LL_ENA
MS_SEL
SLV_ADDR
LL_BAL
100
0
0
60
80
50
DSBL
MAST
0
0 = Master Leads
XXX
XXX
LL_BAL_D
LL_DELAY
PARALLEL
168
5 minutes
YES
X
CLSP_TYP
0 = Single
X.X
XX
X.X
RAMP_EBL
CRAMP
SCHEDNUM
Z_GAIN
ENBL
1.0
0
1.0
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
ENABLEA1
ENABLEA2
ENABLEA3
REVR_ENA
ENBL
OFF/ON
OFF/ON
OFF/ON
OFF/ON
CCNBC
OATBC
GSBC
CCNBCACK
OFF
OFF
OFF
OFF
0 = No Reset
1 = 4 to 20 mA Input
2 = Outdoor Air
Temperature
3 = Return Fluid
4 = Space Temperature
–30 to 30F
(–16.6 to 16.6C)
0 to 125°F
(–17.8 to 51.7°C)
0 to 125°F
(–17.8 to 51.7°C)
–30 to 30F
(–16.6 to 16.6C)
0 to 30F
(0 to 16.6C)
0 to 10F
(0 to 5.5C)
–30 to 30F
(–16.6 to 16.6C)
0 = None
1 = Switch
(Requires EMM)
2 = 4 to 20 mA Input
(Requires EMM)
3 = CCN Loadshed
0 to 100
0 to 99
0 to 60
0 to 120
0 to 100
0 to 100
DSBL/ENBL
SLVE/MAST
0 to 239
0 = Master Leads
1 = Slave Leads
2 = Automatic
40 to 400 hours
0 to 30 minutes
NO/YES
0 = Single
1 = Dual Switch
2 = Dual CCN
Occupied
3 = 4 to 20 mA Input
DSBL/ENBL
0.2 to 2
0 to 99
1 to 4
54
XXX
X
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory
ITEM
TIME
HH.MM
DATE
MNTH
DOM
DAY
YEAR
DST
STR.M
STR.W
STR.D
MIN.A
STP.M
STP.W
STP.D
MIN.S
HOL.L
HD.01
HD.01MON
HD.01DAY
HD.01LEN
HD.02
HD.02MON
HD.02DAY
HD.02LEN
HD.03
HD.03MON
HD.03DAY
HD.03LEN
HD.04
HD.04MON
HD.04DAY
HD.04LEN
HD.05
HD.05MON
HD.05DAY
HD.05LEN
HD.06
HD.06MON
HD.06DAY
HD.06LEN
HD.07
HD.07MON
HD.07DAY
HD.07LEN
HD.08
HD.08MON
HD.08DAY
HD.08LEN
HD.09
HD.09MON
HD.09DAY
HD.09LEN
HD.10
HD.10MON
HD.10DAY
HD.10LEN
HD.11
HD.11MON
HD.11DAY
HD.11LEN
HD.12
HD.12MON
HD.12DAY
HD.12LEN
HD.13
HD.13MON
HD.13DAY
HD.13LEN
EXPANSION
RANGE
TIME OF DAY
Hour and Minute
0 to 65535
MONTH, DATE, DAY, AND YEAR
Month of Year
1 to 12 (1 = January,
2 = February, etc.)
Day of Month
1 to 31
Day of Week
1 - 7 (1 = Monday,
2 = Tuesday, etc.)
Year of Century
1999 to 2098
DAYLIGHT SAVINGS TIME
Month
1 to 12
Week
1 to 5
Day
1 to 7
Minutes to Add
0 to 90
Month
1 to 12
Week
1 to 5
Day
1 to 7
Minutes to Subtract
0 to 90
LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 01
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 02
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 03
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 04
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 05
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 06
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 07
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 08
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 09
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 10
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 11
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 12
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
HOLIDAY SCHEDULE 13
Holiday Start Month
0 to 12
Start Day
0 to 31
Duration (days)
0 to 99
55
UNITS
CCN POINT
XXXXX
TIME
XX
MOY
XX
X
DOM
DOWDISP
XXXX
YOCDISP
XX
X
X
XX
XX
XX
XX
XX
STARTM
STARTW
STARTD
MINADD
STOPM
STOPW
STOPD
MINSUB
XX
XX
XX
HOLMON01
HOLDAY01
HOLLEN01
XX
XX
XX
HOLMON02
HOLDAY02
HOLLEN02
XX
XX
XX
HOLMON03
HOLDAY03
HOLLEN03
XX
XX
XX
HOLMON04
HOLDAY04
HOLLEN04
XX
XX
XX
HOLMON05
HOLDAY05
HOLLEN05
XX
XX
XX
HOLMON06
HOLDAY06
HOLLEN06
XX
XX
XX
HOLMON07
HOLDAY07
HOLLEN07
XX
XX
XX
HOLMON08
HOLDAY08
HOLLEN08
XX
XX
XX
HOLMON09
HOLDAY09
HOLLEN09
XX
XX
XX
HOLMON10
HOLDAY10
HOLLEN10
XX
XX
XX
HOLMON11
HOLDAY11
HOLLEN11
XX
XX
XX
HOLMON12
HOLDAY12
HOLLEN12
XX
XX
XX
HOLMON13
HOLDAY13
HOLLEN13
DEFAULT
4
1
7
60
10
5
7
60
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory
ITEM
HOL.L
HD.14
HD.14MON
HD.14DAY
HD.14LEN
HD.15
HD.15MON
HD.15DAY
HD.15LEN
HD.16
HD.16MON
HD.16DAY
HD.16LEN
HD.17
HD.17MON
HD.17DAY
HD.17LEN
HD.18
HD.18MON
HD.18DAY
HD.18LEN
HD.19
HD.19MON
HD.19DAY
HD.19LEN
HD.20
HD.20MON
HD.20DAY
HD.20LEN
HD.21
HD.21MON
HD.21DAY
HD.21LEN
HD.22
HD.22MON
HD.22DAY
HD.22LEN
HD.23
HD.23MON
HD.23DAY
HD.23LEN
HD.24
HD.24MON
HD.24DAY
HD.24LEN
HD.25
HD.25MON
HD.25DAY
HD.25LEN
HD.26
HD.26MON
HD.26DAY
HD.26LEN
HD.27
HD.27MON
HD.27DAY
HD.27LEN
HD.28
HD.28MON
HD.28DAY
HD.28LEN
HD.29
HD.29MON
HD.29DAY
HD.29LEN
HD.30
HD.30MON
HD.30DAY
HD.30LEN
SCH.N
EXPANSION
LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 14
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 15
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 16
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 17
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 18
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 19
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 20
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 21
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 22
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 23
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 24
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 25
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 26
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 27
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 28
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 29
Holiday Start Month
Start Day
Duration (days)
HOLIDAY SCHEDULE 30
Holiday Start Month
Start Day
Duration (days)
SCHEDULE NUMBER
RANGE
UNITS
CCN POINT
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON14
HOLDAY14
HOLLEN14
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON15
HOLDAY15
HOLLEN15
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON16
HOLDAY16
HOLLEN16
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON17
HOLDAY17
HOLLEN17
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON18
HOLDAY18
HOLLEN18
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON19
HOLDAY19
HOLLEN19
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON20
HOLDAY20
HOLLEN20
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON21
HOLDAY21
HOLLEN21
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON22
HOLDAY22
HOLLEN22
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON23
HOLDAY23
HOLLEN23
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON24
HOLDAY24
HOLLEN24
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON25
HOLDAY25
HOLLEN25
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON26
HOLDAY26
HOLLEN26
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON27
HOLDAY27
HOLLEN27
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON28
HOLDAY28
HOLLEN28
0 to 12
0 to 31
0 to 99
XX
XX
XX
HOLMON29
HOLDAY29
HOLLEN29
0 to 12
0 to 31
0 to 99
0 to 99
XX
XX
XX
XX
HOLMON30
HOLDAY30
HOLLEN30
SCHEDNUM
56
DEFAULT
0
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
ITEM
SCH.L
PER.1
PER.1OCC.1
PER.1UNC.1
PER.1MON.1
PER.1TUE.1
PER.1WED.1
PER.1THU.1
PER.1FRI.1
PER.1SAT.1
PER.1SUN.1
PER.1HOL.1
PER.2
PER.2OCC.2
PER.2UNC.2
PER.2MON.2
PER.2TUE.2
PER.2WED.2
PER.2THU.2
PER.2FRI.2
PER.2SAT.2
PER.2SUN.2
PER.2HOL.2
PER.3
PER.3OCC.3
PER.3UNC.3
PER.3MON.3
PER.3TUE.3
PER.3WED.3
PER.3THU.3
PER.3FRI.3
PER.3SAT.3
PER.3SUN.3
PER.3HOL.3
PER.4
PER.4OCC.4
PER.4UNC.4
PER.4MON.4
PER.4TUE.4
PER.4WED.4
PER.4THU.4
PER.4FRI.4
PER.4SAT.4
PER.4SUN.4
PER.4HOL.4
PER.5
PER.5OCC.5
PER.5UNC.5
PER.5MON.5
PER.5TUE.5
PER.5WED.5
PER.5THU.5
PER.5FRI.5
PER.5SAT.5
PER.5SUN.5
PER.5HOL.5
PER.6
PER.6OCC.6
PER.6UNC.6
PER.6MON.6
PER.6TUE.6
PER.6WED.6
PER.6THU.6
PER.6FRI.6
PER.6SAT.6
PER.6SUN.6
PER.6HOL.6
PER.7
PER.7OCC.7
PER.7UNC.7
PER.7MON.7
PER.7TUE.7
PER.7WED.7
PER.7THU.7
PER.7FRI.7
PER.7SAT.7
PER.7SUN.7
PER.7HOL.7
EXPANSION
LOCAL OCCUPANCY SCHEDULE
OCCUPANCY PERIOD 1
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 2
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 3
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 4
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 5
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 6
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
OCCUPANCY PERIOD 7
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
RANGE
UNITS
CCN POINT
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER1OCC
PER1UNC
PER1MON
PER1TUE
PER1WED
PER1THU
PER1FRI
PER1SAT
PER1SUN
PER1HOL
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER2OCC
PER2UNC
PER2MON
PER2TUE
PER2WED
PER2THU
PER2FRI
PER2SAT
PER2SUN
PER2HOL
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER3OCC
PER3UNC
PER3MON
PER3TUE
PER3WED
PER3THU
PER3FRI
PER3SAT
PER3SUN
PER3HOL
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER4OCC
PER4UNC
PER4MON
PER4TUE
PER4WED
PER4THU
PER4FRI
PER4SAT
PER4SUN
PER4HOL
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER5OCC
PER5UNC
PER5MON
PER5TUE
PER5WED
PER5THU
PER5FRI
PER5SAT
PER5SUN
PER5HOL
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER6OCC
PER6UNC
PER6MON
PER6TUE
PER6WED
PER6THU
PER6FRI
PER6SAT
PER6SUN
PER6HOL
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER7OCC
PER7UNC
PER7MON
PER7TUE
PER7WED
PER7THU
PER7FRI
PER7SAT
PER7SUN
PER7HOL
57
DEFAULT
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
ITEM
SCH.L (cont)
PER.8
PER.8OCC.8
PER.8UNC.8
PER.8MON.8
PER.8TUE.8
PER.8WED.8
PER.8THU.8
PER.8FRI.8
PER.8SAT.8
PER.8SUN.8
PER.8HOL.8
OVR
OVROVR.T
OVROVR.L
OVRT.OVR
EXPANSION
LOCAL OCCUPANCY SCHEDULE
OCCUPANCY PERIOD 8
Period Occupied Time
Period Unoccupied Time
Monday In Period
Tuesday In Period
Wednesday In Period
Thursday In Period
Friday In Period
Saturday In Period
Sunday In Period
Holiday In Period
SCHEDULE OVERRIDE
Timed Override Hours
Override Time Limit
Timed Override
RANGE
UNITS
CCN POINT
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
XX:XX
XX:XX
PER8OCC
PER8UNC
PER8MON
PER8TUE
PER8WED
PER8THU
PER8FRI
PER8SAT
PER8SUN
PER8HOL
0 to 4 hours
0 to 4 hours
NO/YES
X
X
OVR_EXT
OTL
TIMEOVER
DEFAULT
0
0
NO
Operating Mode and Sub-Mode Directory
ITEM
MODE
MD01
MD02
MD03
MD05
MD06
MD07
MD09
MD10
MD13
MD14
MD15
MD16
MD17
MD18
MD19
MD20
MD21
MD23
MD24
MD25
EXPANSION
MODES CONTROLLING UNIT
CSM controlling Chiller
WSM controlling Chiller
Master/Slave control
Ramp Load Limited
Timed Override in effect
Low Cooler Suction TempA
Slow Change Override
Minimum OFF time active
Dual Setpoint
Temperature Reset
Demand/Sound Limited
Cooler Freeze Protection
Low Temperature Cooling
High Temperature Cooling
Making ICE
Storing ICE
High SCT Circuit A
Minimum Comp. On Time
Pump Off Delay Time
Low Sound Mode
RANGE
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
UNITS
CCN POINT
MODE_1
MODE_2
MODE_3
MODE_5
MODE_6
MODE_7
MODE_9
MODE_10
MODE_13
MODE_14
MODE_15
MODE_16
MODE_17
MODE_18
MODE_19
MODE_20
MODE_21
MODE_23
MODE_24
MODE_25
58
DEFAULT
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Alarms Mode and Sub-Mode Directory
ITEM
CRNT
AA01
AA02
AA03
AA04
AA05
AA06
AA07
AA08
AA09
AA10
AA11
AA12
AA13
AA14
AA15
AA16
AA17
AA18
AA19
AA20
AA21
AA22
AA23
AA24
AA25
RCRN
HIST
AL01
AL02
AL03
AL04
AL05
AL06
AL07
AL08
AL09
AL10
AL11
AL12
AL13
AL14
AL15
AL16
AL17
AL18
AL19
AL20
EXPANSION
CURRENTLY ACTIVE ALARMS
Current Alarms 1-25
Reset All Current Alarms
ALARM HISTORY
Alarm History 1-20
RANGE
UNITS
CCN POINT
COMMENT
Alarms are shown as
AXXX
Alerts are shown as
TXXX
PreAlerts are shown as
PXXX
AXXX
TXXX
PXXX
NO/YES
ALRESET
Alarms are shown as
AXXX
Alerts are shown as
TXXX
PreAlerts are shown as
PXXX
AXXX
TXXX
PXXX
59
APPENDIX B — CCN TABLES
CCN DISPLAY TABLES
TABLE
A-UNIT
CIRCA_AN
CIRCADIO
OPTIONS
DISPLAY NAME
RANGE
GENERAL UNIT PARAMETERS
Control Mode
10-char ASCII
Occupied
No/Yes
CCN Chiller
Stop/Start
Alarm State
6-char ASCII
Active Demand Limit
NNN
Override Modes in Effect
No/Yes
Percent Total Capacity
NNN
Requested Stage
NN
Active Setpoint
NNN.n
Control Point
NNN.n
Degrees of Reset
NN.n
Entering Fluid Temp
NNN.n
Leaving Fluid Temp
NNN.n
Emergency Stop
Enable/EMStop
Minutes Left for Start
5-char ASCII
PUMPS
Cooler Pump Relay
Off/On
Condenser Pump
Off/On
Cooler Flow Switch
Off/On
CIRCUIT A ANALOG PARAMETERS
Percent Total Capacity
NNN
Percent Available Cap.
NNN
Discharge Pressure
NNN.n
Suction Pressure
NNN.n
Head Setpoint
NNN.n
Saturated Condensing Tmp
NNN.n
Saturated Suction Temp
NNN.n
Compr Return Gas Temp
NNN.n
Discharge Gas Temp
NNN.n
Suction Superheat Temp
NNN.n
CIRCUIT A DISCRETE INPUTS/OUTPUTS
CIRC. A DISCRETE OUTPUTS
Compressor A1 Relay
Off/On
Compressor A1 Unload Time
NN
Compressor A2 Relay
Off/On
Compressor A3 Relay
Off/On
Minimum Load Valve Relay
Off/On
CIRC. A DISCRETE INPUTS
Compressor A1 Feedback
Off/On
Compressor A2 Feedback
Off/On
Compressor A3 Feedback
Off/On
UNIT PARAMETERS
UNIT ANALOG VALUES
Cooler Entering Fluid
NNN.n
Cooler Leaving Fluid
NNN.n
Condenser Entering Fluid
NNN.n
Condenser Leaving Fluid
NNN.n
Lead/Lag Leaving Fluid
NNN.n
TEMPERATURE RESET
4-20 ma Reset Signal
NN.n
Outside Air Temperature
NNN.n
Space Temperature
NNN.n
DEMAND LIMIT
4-20 ma Demand Signal
NN.n
Demand Limit Switch 1
Off/On
Demand Limit Switch 2
Off/On
CCN Loadshed Signal
N
MISCELLANEOUS
Dual Setpoint Switch
Off/On
Cooler LWT Setpoint
NNN.n
Ice Done
Off/On
UNITS
%
%
degF
degF
deltaF
degF
degF
POINT NAME
STAT
OCC
CHIL_S_S
ALM
DEM_LIM
MODE
CAP_T
STAGE
SP
CTRL_PNT
DEG_RST
EWT
LWT
EMSTOP
MIN_LEFT
WRITE STATUS
forcible
forcible
forcible
forcible
COOLPUMP
CONDPUMP
COOLFLOW
%
%
PSIG
PSIG
degF
degF
degF
degF
degF
deltaF
secs
CAPA_T
CAPA_A
DP_A
SP_A
HSP
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A
K_A1_RLY
ALUNLTME
K_A2_RLY
K_A3_RLY
MLV_RLY
K_A1_FBK
K_A2_FBK
K_A3_FBK
degF
degF
degF
degF
degF
COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
DUAL_LWT
milliAmps
degF
degF
RST_MA
OAT
SPT
milliAmps
LMT_MA
DMD_SW1
DMD_SW2
DL_STAT
degF
60
DUAL_IN
LWT_SP
ICE_DONE
forcible
forcible
APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES
TABLE
STRTHOUR
DISPLAY NAME
RANGE
UNITS
POINT NAME
Machine Operating Hours
Machine Starts
Compressor A1 Run Hours
Compressor A2 Run Hours
Compressor A3 Run Hours
Compressor A1 Starts
Compressor A2 Starts
Compressor A3 Starts
PUMP HOURS
Cooler Pump Run Hours
Condenser Pump Run Hours
NNNNNN
NNNNNN
NNNNNN.n
NNNNNN.n
NNNNNN.n
NNNNNN
NNNNNN
NNNNNN
hours
hours
hours
hours
HR_MACH
CY_MACH
HR_A1
HR_A2
HR_A3
CY_A1
CY_A2
CY_A3
NNNNNN.n
NNNNNN.n
hours
hours
HR_CPUMP
HR_DPUMP
CSM controlling Chiller
WSM controlling Chiller
Master/Slave control
Ramp Load Limited
Timed Override in effect
Low Cooler Suction TempA
Slow Change Override
Minimum OFF time active
Dual Setpoint
Temperature Reset
Demand/Sound Limited
Cooler Freeze Protection
Low Temperature Cooling
High Temperature Cooling
Making ICE
Storing ICE
High SCT Circuit A
Minimum Comp. On Time
Pump Off Delay Time
Low Sound Mode
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
MODE_1
MODE_2
MODE_3
MODE_5
MODE_6
MODE_7
MODE_9
MODE_10
MODE_13
MODE_14
MODE_15
MODE_16
MODE_17
MODE_18
MODE_19
MODE_20
MODE_21
MODE_23
MODE_24
MODE_25
Active Alarm #1
Active Alarm #2
Active Alarm #3
Active Alarm #4
Active Alarm #5
Active Alarm #6
Active Alarm #7
Active Alarm #8
Active Alarm #9
Active Alarm #10
Active Alarm #11
Active Alarm #12
Active Alarm #13
Active Alarm #14
Active Alarm #15
Active Alarm #16
Active Alarm #17
Active Alarm #18
Active Alarm #19
Active Alarm #20
Active Alarm #21
Active Alarm #22
Active Alarm #23
Active Alarm #24
Active Alarm #25
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
4-char ASCII
ALARM01C
ALARM02C
ALARM03C
ALARM04C
ALARM05C
ALARM06C
ALARM07C
ALARM08C
ALARM09C
ALARM10C
ALARM11C
ALARM12C
ALARM13C
ALARM14C
ALARM15C
ALARM16C
ALARM17C
ALARM18C
ALARM19C
ALARM20C
ALARM21C
ALARM22C
ALARM23C
ALARM24C
ALARM25C
CURRMODS
ALARMS
61
WRITE STATUS
APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES (cont)
TABLE
VERSIONS
LOADFACT
DISPLAY NAME
RANGE
UNITS
5-char ASCII
5-char ASCII
5-char ASCII
5-char ASCII
5-char ASCII
POINT NAME
CESR131333CESR131482CESR131174CESR131171CESR131227CAPACITY CONTROL
Load/Unload Factor
Control Point
Entering Fluid Temp
Leaving Fluid Temp
Ramp Load Limited
Slow Change Override
Cooler Freeze Protection
Low Temperature Cooling
High Temperature Cooling
Minimum Comp. On Time
AUX
MBB
EMM
MARQUEE
NAVIGATOR
NNN
NNN.n
NNN.n
NNN.n
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
SCT Delta for Comp A1
SCT Delta for Comp A2
SCT Delta for Comp A3
NNN.n
NNN.n
NNN.n
deltaF
deltaF
deltaF
A1SCTDT
A2SCTDT
A3SCTDT
Strainer Srvc Interval
Strainer Srvc Countdown
Strainer Maint. Done
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
NNNNN
NNNNN
No/Yes
15-char ASCII
15-char ASCII
15-char ASCII
15-char ASCII
15-char ASCII
hours
hours
SI_STRNR
ST_CDOWN
ST_MAINT
STRN_PM0
STRN_PM1
STRN_PM2
STRN_PM3
STRN_PM4
Service Test Mode
Compressor A1 Relay
Compressor A2 Relay
Compressor A3 Relay
Cooler Pump Relay
Condenser Pump
Comp A1 Unload Time
Remote Alarm Relay
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
NN
Off/On
Percent Total Capacity
Percent Available Cap.
Discharge Pressure
Suction Pressure
Saturated Condensing Tmp
Saturated Suction Temp
Compr Return Gas Temp
Discharge Gas Temp
Suction Superheat Temp
Compressor A1 Relay
Compressor A2 Relay
Compressor A3 Relay
Minimum Load Valve Relay
Compressor A1 Feedback
Compressor A2 Feedback
Compressor A3 Feedback
Outside Air Temperature
Space Temperature
Cooler Pump Relay
Condenser Pump
Cooler Entering Fluid
Cooler Leaving Fluid
Condenser Entering Fluid
Condenser Leaving Fluid
Cooler Flow Switch
NNN
NNN
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
NNN.n
NNN.n
Off/On
Off/On
NNN.n
NNN.n
NNN.n
NNN.n
Off/On
degF
degF
degF
SMZ
CTRL_PNT
EWT
LWT
MODE_5
MODE_9
MODE_16
MODE_17
MODE_18
MODE_23
LEARNFNS
PM-STRN
TESTMODE
secs
NET_CTRL
S_A1_RLY
S_A2_RLY
S_A3_RLY
S_CLPMP
S_CNDPMP
S_A1ULTM
S_ALM
RUNTEST
62
%
%
PSIG
PSIG
degF
degF
degF
degF
deltaF
degF
degF
degF
degF
degF
degF
CAPA_T
CAPA_A
DP_A
SP_A
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A
K_A1_RLY
K_A2_RLY
K_A3_RLY
MLV_RLY
K_A1_FBK
K_A2_FBK
K_A3_FBK
OAT
SPT
COOLPUMP
CONDPUMP
COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
COOLFLOW
APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES (cont)
TABLE
DUALCHIL
DISPLAY NAME
RANGE
Dual Chiller Link Good?
Master Chiller Role
Slave Chiller Role
Lead Chiller Ctrl Point
Lag Chiller Ctrl Point
Control Point
Cool EnteringFluid-Slave
Cool Leaving Fluid-Slave
Cooler Entering Fluid
Cooler Leaving Fluid
Lead/Lag Leaving Fluid
Percent Avail.Capacity
Percent Avail.Cap.Slave
Lag Start Delay Time
Load/Unload Factor
Load/Unload Factor-Slave
Lead SMZ Clear Commanded
Lag SMZ Clear Commanded
Lag Commanded Off?
Dual Chill Lead CapLimit
Dual Chill Lag CapLimit
No/Yes
12-char ASCII
12-char ASCII
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NNN
NNN
5-char ASCII
NNN
NNNN
No/Yes
No/Yes
No/Yes
NNN.n
NNN.n
UNITS
POINT NAME
DC_LINK
MC_ROLE
SC_ROLE
LEAD_CP
LAG_CP
CTRL_PNT
COOLEWTS
COOLLWTS
COOL_EWT
COOL_LWT
DUAL_LWT
CAP_A
CAP_A_S
LAGDELAY
SMZ
SMZSLAVE
LEADSMZC
LAG_SMZC
LAG_OFF
DCLDCAPL
DCLGCAPL
degF
degF
degF
degF
degF
degF
degF
degF
%
%
%
%
CCN CONFIGURATION TABLES
TABLE
UNIT
OPTIONS1
OPTIONS2
SCHEDOVR
DISPLAY NAME
UNIT CONFIGURATION
Unit Type
Unit Size
Compressor A1 Size
Compressor A2 Size
Compressor A3 Size
Suction Superheat Setpt
Compressor A1 Digital?
Maximum A1 Unload Time
RANGE
DEFAULT
N
NNN
NNN
NNN
NNN
NN.n
No/Yes
NN
Unit Dependent
Unit Size
Unit Size Dependent
Unit Size Dependent
Unit Size Dependent
9.0 deg F
Unit Dependent
10 - 015 to 030
7 - 035 to 045
UNITS
tons
tons
tons
tons
deltaF
secs
POINT NAME
UNIT_TYP
SIZE
SIZE_A1
SIZE_A2
SIZE_A3
SH_SP
CPA1TYPE
MAXULTME
OPTIONS 1 CONFIGURATION
Cooler Fluid
N
1=Water
Minimum Load Vlv Select
Return Gas Sensor Enable
Enable OAT Sensor
CSB Boards Enable
Reverse Rotation Enable
Cooler Pump Control
Cooler Pump Shutdown Dly
EMM Module Installed
Enable Condenser Pump
No/Yes
Disable/Enable
Disable/Enable
Disable/Enable
Disable/Enable
Off/On
NN
No/Yes
N
No
Disable
Disable
Enable
Enable
Off
1
No
0=No Conrol
Enable Cond Wtr Sensors
Enable Cond Flow Switch
OPTIONS 2 CONFIGURATION
Control Method
Loading Sequence Select
Lead/Lag Circuit Select
Cooling Setpoint Select
Ramp Load Select
High LCW Alert Limit
Minutes Off time
Deadband Multiplier
Ice Mode Enable
TIME OVERRIDE SETUP
Schedule Number
Override Time Limit
Timed Override Hours
Timed Override
Disable/Enable
Disable/Enable
Disable
Disable
CONDWTRS
CONDFLSW
N
N
N
N
Disable/Enable
NN.n
NN
N.n
Disable/Enable
0
1
1
0
Enable
60.0
0
1.0
Disable
CONTROL
SEQ_TYPE
LEAD_TYP
CLSP_TYP
RAMP_EBL
LCW_LMT
DELAY
Z_GAIN
ICE_CNFG
NN
N
N
No/Yes
1
0
0
No
63
1=Water
2=Medium Temperature
Brine
mins
0=No Control
1=On When Occupied
2=On with Compressors
deltaF
mins
hours
hours
FLUIDTYP
MLV_FLG
RGT_ENA
OAT_ENA
CSB_ENA
REVR_ENA
CPC
PUMP_DLY
EMM_BRD
CONDPMPE
SCHEDNUM
OTL
OVR_EXT
TIMEOVER
APPENDIX B — CCN TABLES (cont)
CCN CONFIGURATION TABLES (cont)
TABLE
RESETCON
DUALCHILL
DISPLAY
DISPLAY NAME
RANGE
TEMPERATURE RESET AND DEMAND LIMIT
COOLING RESET
Cooling Reset Type
N
4-20 MA RESET
4-20 - Degrees Reset
NNN.n
REMOTE RESET
Remote - No Reset Temp
NNN.n
Remote - Full Reset Temp
NNN.n
Remote - Degrees Reset
NNN.n
RETURN TEMPERATURE RESET
Return - No Reset Temp
NNN.n
Return - Full Reset Temp
NNN.n
Return - Degrees Reset
NNN.n
DEMAND LIMIT
Demand Limit Select
N
Demand Limit at 20 mA
NNN.n
Loadshed Group Number
NN
Loadshed Demand Delta
NN
Maximum Loadshed Time
NNN
Demand Limit Switch 1
NNN
Demand Limit Switch 2
NNN
DUAL CHILLER CONFIGURATION SETTINGS
LEAD/LAG
Lead/Lag Chiller Enable
Disable/Enable
Master/Slave Select
Master/Slave
Slave Address
NNN
Lead/Lag Balance Select
N
Lead/Lag Balance Delta
NNN
Lag Start Delay
NN
Parallel Configuration
No/Yes
MARQUEE DISPLAY SETUP
Service Password
NNNN
Password Enable
Disable/Enable
Metric Display
Off/On
Language Selection
N
DEFAULT
UNITS
0
POINT NAME
CRST_TYP
10.0
deltaF
MA_DEG
10.0
0.0
0.0
degF
degF
deltaF
REM_NO
REM_FULL
REM_DEG
10.0
0.0
0.0
deltaF
deltaF
deltaF
RTN_NO
RTN_FULL
RTN_DEG
0
100.0
0
0
60
80
50
DMD_CTRL
DMT20MA
SHED_NUM
SHED_DEL
SHED_TIM
DLSWSP1
DLSWSP2
%
%
mins
%
%
Disable
Master
2
0
168
5
Yes
LL_ENA
MS_SEL
SLV_ADDR
LL_BAL
LL_BAL_D
LL_DELAY
PARALLEL
hours
mins
1111
Enable
Off
0
PASSWORD
PASS_EBL
DISPUNIT
LANGUAGE
CCN SERVICE TABLES
TABLE
SERVICE
DISPLAY NAME
SERVICE
Brine Freeze Point
COMPRESSOR ENABLE
Enable Compressor A1
Enable Compressor A2
Enable Compressor A3
RANGE
DEFAULT
NNN.n
34.0
Disable/Enable
Disable/Enable
Disable/Enable
Unit Dependent
Unit Dependent
Unit Dependent
UNITS
degF
POINT NAME
BRN_FRZ
ENABLEA1
ENABLEA2
ENABLEA3
CCN SETPOINT TABLES
TABLE
SETPOINT
DISPLAY NAME
SETPOINT
COOLING
Cooling Setpoint 1
Cooling Setpoint 2
ICE Setpoint
RAMP LOADING
Cooling Ramp Loading
Brine Freeze Point
RANGE
DEFAULT
UNITS
POINT NAME
NNN.n
NNN.n
NNN.n
44.0
44.0
32.0
degF
degF
degF
CSP1
CSP2
CSP3
N.n
NNN.n
1.0
34.0
degF
CRAMP
BRN_FRZ
64
APPENDIX C — BACNET COMMUNICATION OPTION
6
5
7 8
2 34
5
6
10's
1
9 0
2 34
7 8
9 0
1
The following section is used to configure the UPC Open controller which is used when the BACnet* communication
option is selected. The UPC Open controller is mounted in the
main control box per unit components arrangement diagrams.
TO ADDRESS THE UPC OPEN CONTROLLER — The
user must give the UPC Open controller an address that is
unique on the BACnet network. Perform the following procedure to assign an address:
1. If the UPC Open controller is powered, pull the screw terminal connector from the controller's power terminals labeled Gnd and HOT. The controller reads the address
each time power is applied to it.
2. Using the rotary switches (see Fig. A and B), set the controller's address. Set the Tens (10's) switch to the tens digit of the address, and set the Ones (1's) switch to the ones
digit.
As an example in Fig. B, if the controller’s address is 25,
point the arrow on the Tens (10's) switch to 2 and the arrow on
the Ones (1's) switch to 5.
1's
Fig. B — Address Rotary Switches
BACNET DEVICE INSTANCE ADDRESS — The UPC
Open controller also has a BACnet Device Instance address.
This Device Instance MUST be unique for the complete BACnet system in which the UPC Open controller is installed. The
Device Instance is auto generated by default and is derived by
adding the MAC address to the end of the Network Number.
The Network Number of a new UPC Open controller is 16101,
but it can be changed using i-Vu® Tools or BACView device.
By default, a MAC address of 20 will result in a Device Instance of 16101 + 20 which would be a Device Instance of
1610120.
BT485
TERMINATOR
BACNET
CONNECTION
(BAS PORT)
POWER LED
Tx1 LED
Rx1 LED
Tx2 LED
Rx2 LED
23
45
01
8
67 9
EIA-485
JUMPERS
01
8
67 9
23
45
BACNET
BAUD RATE
DIP SWITCHES
ADDRESS
ROTARY
SWITCHES
RUN LED
ERROR LED
Fig. A — UPC Open Controller
* Sponsored by ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers).
65
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
CONFIGURING THE BAS PORT FOR BACNET MS/
TP — Use the same baud rate and communication settings for
all controllers on the network segment. The UPC Open controller is fixed at 8 data bits, No Parity, and 1 Stop bit for this
protocol's communications.
If the UPC Open controller has been wired for power, pull
the screw terminal connector from the controller's power terminals labeled Gnd and HOT. The controller reads the DIP
Switches and jumpers each time power is applied to it.
Set the BAS Port DIP switch DS3 to “enable.” Set the BAS
Port DIP switch DS4 to “E1-485.” Set the BMS Protocol DIP
switches DS8 through DS5 to “MSTP.” See Table A.
Fig. C — DIP Switches
Table A — SW3 Protocol Switch Settings
for MS/TP
DS8
Off
DS7
Off
DS6
Off
DS5
Off
DS4
On
Wire the controllers on an MS/TP network segment in a daisy-chain configuration. Wire specifications for the cable are
22 AWG (American Wire Gage) or 24 AWG, low-capacitance,
twisted, stranded, shielded copper wire. The maximum length
is 2000 ft.
Install a BT485 terminator on the first and last controller on
a network segment to add bias and prevent signal distortions
due to echoing. See Fig. A, D, and E.
To wire the UPC Open controller to the BAS network:
1. Pull the screw terminal connector from the controller's
BAS Port.
2. Check the communications wiring for shorts and
grounds.
3. Connect the communications wiring to the BAS port’s
screw terminals labeled Net +, Net -, and Shield.
NOTE: Use the same polarity throughout the network
segment.
4. Insert the power screw terminal connector into the UPC
Open controller's power terminals if they are not currently connected.
5. Verify communication with the network by viewing a
module status report. To perform a module status report
using the BACview keypad/display unit, press and hold
the “FN” key then press the “.” Key.
DS3
Off
Verify that the EIA-485 jumpers below the CCN Port are set
to EIA-485 and 2W.
The example in Fig. C shows the BAS Port DIP Switches
set for 76.8k (Carrier default) and MS/TP.
Set the BAS Port DIP Switches DS2 and DS1 for the appropriate communications speed of the MS/TP network (9600,
19.2k, 38.4k, or 76.8k bps). See Fig. C and Table B.
Table B — Baud Selection Table
BAUD RATE
9,600
19,200
38,400
76,800
DS2
Off
On
Off
On
DS1
Off
Off
On
On
WIRING THE UPC OPEN CONTROLLER TO THE MS/
TP NETWORK — The UPC Open controller communicates
using BACnet on an MS/TP network segment communications
at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps.
Fig. D — Network Wiring
66
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Fig. E — BT485 Terminator Installation
temperature rating specifications list two acceptable alternatives. The Halar specification has a higher temperature rating
and a tougher outer jacket than the SmokeGard specification,
and it is appropriate for use in applications where the user is
concerned about abrasion. The Halar jacket is also less likely to
crack in extremely low temperatures.
NOTE: Use the specified type of wire and cable for maximum
signal integrity.
To install a BT485 terminator, push the BT485 terminator
on to the BT485 connector located near the BACnet connector.
NOTE: The BT485 terminator has no polarity associated with
it.
To order a BT485 terminator, consult Commercial Products
i-Vu® Open Control System Master Prices.
MS/TP WIRING RECOMMENDATIONS — Recommendations are shown in Tables C and D. The wire jacket and UL
Table C — MS/TP Wiring Recommendations
SPECIFICATION
Cable
Conductor
Insulation
Color Code
Twist Lay
Shielding
Jacket
DC Resistance
Capacitance
Characteristic Impedance
Weight
UL Temperature Rating
Voltage
Listing
AWG
CL2P
DC
FEP
NEC
O.D.
TC
UL
—
—
—
—
—
—
—
—
RECOMMMENDATION
Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable
22 or 24 AWG stranded copper (tin plated)
Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) O.D.
Black/White
2 in. (50.8 mm) lay on pair 6 twists/foot (20 twists/meter) nominal
Aluminum/Mylar shield with 24 AWG TC drain wire
SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) O.D.
Halar Jacket (E-CTFE) 0.010 in. (0.254 mm) wall 0.144 in. (3.6576 mm) O.D.
15.2 Ohms/1000 feet (50 Ohms/km) nominal
12.5 pF/ft (41 pF/meter) nominal conductor to conductor
100 Ohms nominal
12 lb/1000 feet (17.9 kg/km)
SmokeGard 167°F (75°C)
Halar -40 to 302°F (-40 to 150°C)
300 Vac, power limited
UL: NEC CL2P, or better
LEGEND
American Wire Gage
Class 2 Plenum Cable
Direct Current
Fluorinated Ethylene Polymer
National Electrical Code
Outside Diameter
Tinned Copper
Underwriters Laboratories
67
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Table D — Open System Wiring Specifications and Recommended Vendors
WIRING SPECIFICATIONS
Wire Type
RECOMMENDED VENDORS AND PART NUMBERS
Connect Air
Contractors
Belden RMCORP Wire and Cable
International
Description
22 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide for
specifications.
MS/TP
Network (RS-485) 24 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide
for specifications.
Rnet
4 conductor, unshielded, CMP, 18 AWG, plenum rated.
AWG
CL2P
CMP
FEP
TC
—
—
—
—
—
W221P-22227
—
25160PV
CLP0520LC
W241P-2000F
82841
25120-OR
—
W184C-2099BLB
6302UE
21450
CLP0442
LEGEND
American Wire Gage
Class 2 Plenum Cable
Communications Plenum Rated
Fluorinated Ethylene Polymer
Tinned Copper
number and CCN Bus number. The factory default settings for
CCN Element and CCN Bus number are 1 and 0 respectively.
If modifications to the default Element and Bus number are
required, both the ComfortLink and UPC Open configurations
must be changed.
The following configurations are used to set the CCN Address and Bus number in the ComfortLink controller. These
configurations can be changed using the scrolling marquee display or accessory Navigator handheld device.
Configuration→CCN→CCN.A (CCN Address)
Configuration→CCN→CCN.B (CCN Bus Number)
The following configurations are used to set the CCN Address and Bus Number in the UPC Open controller. These configurations can be changed using the accessory BACview6 display.
Navigation: BACview→CCN
Home: Element Comm Stat
Element: 1
Bus: 0
LOCAL ACCESS TO THE UPC OPEN CONTROLLER — The user can use a BACview6 handheld keypad display unit or the Virtual BACview software as a local user interface to an Open controller. These items let the user access the
controller network information. These are accessory items and
do not come with the UPC Open controller.
The BACview6 unit connects to the local access port on the
UPC Open controller. See Fig. F. The BACview software must
be running on a laptop computer that is connected to the local
access port on the UPC Open controller. The laptop will require an additional USB link cable for connection.
See the BACview Installation and User Guide for instructions on connecting and using the BACview6 device.
To order a BACview6 Handheld (BV6H), consult Commercial Products i-Vu Open Control System Master Prices.
CONFIGURING THE UPC OPEN CONTROLLER'S
PROPERTIES — The UPC Open device and ComfortLink
controller must be set to the same CCN Address (Element)
Fig. F — BACview6 Device Connection
68
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
traffic based on the baud rate set. The higher the baud rate the
more solid the LEDs become. See Fig. A for location of LEDs
on UPC Open module.
REPLACING THE UPC OPEN BATTERY — The UPC
Open controller's 10-year lithium CR2032 battery provides a
minimum of 10,000 hours of data retention during power outages.
If the UPC Open is used with the chiller application of
Lead/Lag/Standby, all chillers and UPC Open's CCN element
numbers must be changed to a unique number in order to follow CCN specifications. In this application, there can only be a
maximum of 3 UPC Open controllers on a CCN bus.
For the CCN Alarm Acknowledger configuration, the UPC
Open defaults to CCN Acknowledger. If a Chiller Lead/Lag/
Standby application is being used, then the Carrier technician
must change the configuration to only one CCN Acknowledger
on the CCN bus.
For the CCN Time Broadcaster configuration, the UPC
Open defaults to CCN Time Broadcaster. If the Chiller Lead/
Lag/Standby application is used, then the Carrier technician
must change the configuration to only one CCN Time Broadcaster on the CCN bus.
TROUBLESHOOTING — If there are problems wiring or
addressing the UPC Open controller, contact Carrier Technical
Support.
COMMUNICATION LEDS — The LEDs indicate if the
controller is communicating with the devices on the network.
See Tables E and F. The LEDs should reflect communication
IMPORTANT: Power must be ON to the UPC Open when
replacing the battery, or the date, time, and trend data will
be lost.
Remove the battery from the controller, making note of the
battery's polarity. Insert the new battery, matching the battery's
polarity with the polarity indicated on the UPC Open
controller.
NETWORK POINTS LIST — The points list for the controller is shown in Table G.
Refer to Appendix B for additional information on CCN
point name.
Table E — LED Status Indicators
LED
Power
Rx
Tx
Run
Error
STATUS
Lights when power is being supplied to the controller. The UPC Open controller is protected by internal solid-state polyswitches on
the incoming power and network connections. These polyswitches are not replaceable and will reset themselves if the condition
that caused the fault returns to normal.
Lights when the controller receives data from the network segment; there is an Rx LED for Ports 1 and 2.
Lights when the controller transmits data to the network segment; there is a Tx LED for Ports 1 and 2.
Lights based on controller status. See Table F.
Lights based on controller status. See Table F.
Table F — Run and Error LEDs Controller and Network Status Indication
RUN LED
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
2 flashes per second
5 flashes per second
5 flashes per second
7 flashes per second
14 flashes per second
ERROR LED
Off
2 flashes, alternating with Run LED
3 flashes, then off
1 flash per second
On
On
Off
7 flashes per second, alternating with Run LED
14 flashes per second, alternating with Run LED
69
STATUS
Normal
Five minute auto-restart delay after system error
Controller has just been formatted
Controller is alone on the network
Exec halted after frequent system errors or control programs halted
Exec start-up aborted, Boot is running
Firmware transfer in progress, Boot is running
Ten second recovery period after brownout
Brownout
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Table G — Network Points List
POINT DESCRIPTION
4-20 ma Demand Signal
4-20 ma Reset Signal
Active Demand Limit
Active Setpoint
Alarm State
CCN Chiller
CCN Loadshed Signal
Comp A1 Unload Time
Compr Return Gas Temp
Compressor A1 Feedback
Compressor A1 Relay
Compressor A1 Run Hours
Compressor A1 Starts
Compressor A2 Feedback
Compressor A2 Relay
Compressor A2 Run Hours
Compressor A2 Starts
Compressor A3 Feedback
Compressor A3 Relay
Compressor A3 Run Hours
Compressor A3 Starts
Condenser Entering Fluid
Condenser Leaving Fluid
Condenser Pump Relay
Condenser Pump Run Hours
Control Method
Control Mode
Control Point
Cooler Entering Fluid
Cooler Flow Switch
Cooler Fluid
CCN POINT
NAME
LMT_MA
RST_MA
DEM_LIM
SP
READ/
WRITE
R
R
R/W
R
ALM
R
CHIL_S_S
DL_STAT
A1UNLTME
TMP_RGTA
K_A1_FBK
K_A1_RLY
HR_A1
CY_A1
K_A2_FBK
K_A2_RLY
HR_A2
CY_A2
K_A3_FBK
K_A3_RLY
HR_A3
CY_A3
COND_EWT
COND_LWT
CONDPUMP
HR_DPUMP
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
CONTROL
R
STAT
CTRL_PNT
COOL_EWT
COOLFLOW
R
R/W
R
R
FLUIDTYP
R
Cooler Freeze Protection
Cooler Leaving Fluid
Cooler LWT Setpoint
Cooler Pump Relay
Cooler Pump Run Hours
Cooler Pump Shutdown Dly
Cooling Ramp Loading
MODE_16
COOL_LWT
LWT_SP
COOLPUMP
HR_CPUMP
PUMP_DLY
CRAMP
R
R
R
R
R/W
R/W
Cooling Reset Type
CRST_TYP
R
CSP1
CSP2
MODE_1
R/W
R/W
R
R/W
R/W
R/W
Demand Limit Select
DMD_CTRL
R
Demand Limit Switch 1
Demand Limit Switch 2
Demand/Sound Limited
Discharge Gas Temp
Discharge Pressure
DMD_SW1
DMD_SW2
MODE_15
DISGAS
DP_A
R
R
R
R
R
Cooling Setpoint 1
Cooling Setpoint 2
CSM controlling Chiller
Demand Level 1
Demand Level 2
Demand Level 3
UNITS
DEFAULT
VALUE
mA
mA
%
°F
100
Start
sec
°F
hr
hr
hr
°F
°F
hr
°F
°F
44.0
°F
°F
hr
min
°F
1
1.0
°F
°F
44.0
44.0
°F
psig
LEGEND
R — Read
W — Write
70
RANGE
0-20
0-20
0-100
-20-70
1 = Normal
2 = Alarm
3 = Alert
Start/Stop
0-2
1-15
-40-245
On/Off
On/Off
0-9999
0-9999
On/Off
On/Off
0-9999
0-9999
On/Off
On/Off
0-9999
0-9999
-40-245
-40-245
On/Off
0-9999
1 = Switch
2 = Occupancy
3 = Occupancy
4 = CCN
0-9
-20-70
-40-245
Open/Close
1 = Water
2 = Medium Brine
On/Off
-40-245
-20-70
On/Off
0-9999
0-10
0.2-2.0
1 = No Reset
2 = 4-20mA Input
3 = External Temp Oat
4 = Return Fluid
5 = External Temp - Spt
-20-70
-20-70
On/Off
0-100
0-100
0-100
1 = None
2 = External Sw. Input
3 = 4-20mA Input
4 = Loadshed
On/Off
On/Off
On/Off
-40-245
0-999
BACNET
OBJECT ID
AV:36
AV:33
AV:2
AV:4
BACNET
OBJECT NAME
lmt_ma_1
rst_ma_1
dem_lim_1
sp_1
BV:59
alm_1
BV:4
AV:37
AV:78
AV:20
BV:16
BV:13
AV:60
AV:68
BV:17
BV:14
AV:61
AV:69
BV:18
BV:15
AV:62
AV:70
AV:10
AV:18
BV:2
AV:72
chil_s_s_1
dl_stat_1
a1unltme_1
tmp_rgta_1
k_a1_fbk_1
k_a1_rly_1
hr_a1_1
cy_a1_1
k_a2_fbk_1
k_a2_rly_1
hr_a2_1
cy_a2_1
k_a3_fbk_1
k_a3_rly_1
hr_a3_1
cy_a3_1
cond_ewt_1
cond_lwt_1
condpump_1
hr_dpump_1
MSV:5
control_msv_1
AV:8
AV:5
AV:30
BV:11
stat_1
ctrl_pnt_1
cool_ewt_1
coolflow_1
MSV:4
fluidtyp_msv_1
BV:42
AV:31
AV:38
BV:7
AV:71
AV:41
AV:56
mode_16_1
cool_lwt_1
lwt_sp_1
coolpump_1
hr_cpump_1
pump_dly_1
cramp_1
MSV:7
crst_typ1_msv_1
AV:53
AV:54
BV:30
AV:80
AV:81
AV:82
csp1_1
csp2_1
mode_1_1
dmv_lvl_1_perct_1
dmv_lvl_2_perct_1
dmv_lvl_3_perct_1
MSV:8
dmd_ctrl_msv_1
BV:25
BV:26
BV:41
AV:15
AV:13
dmd_sw1_1
dmd_sw2_1
mode_15_1
disgas_1
dp_a_1
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Table G — Network Points List (cont)
POINT DESCRIPTION
Dual Setpoint
Dual Setpoint Switch
Element Comm Status
Emergency Stop
Entering Fluid Temp
High SCT Circuit A
High Temperature Cooling
Ice Done
ICE Setpoint
Lead/Lag Circuit Select
Lead/Lag Leaving Fluid
Leaving Fluid Temp
Loading Sequence Select
Low Cooler Suction TempA
Low Sound Mode
Low Temperature Cooling
Machine Operating Hours
Machine Starts
Making ICE
Master/Slave control
Minimum Comp. On Time
Minimum Load Valve Relay
Minimum OFF time active
Minutes Left for Start
Minutes Off Time
Occupancy Status
Outdoor Air Temperature
Override Modes in Effect
Percent Available Cap.
Percent Total Capacity
Percent Total Capacity
Pump Off Delay Time
Ramp Load Limited
Requested Stage
Saturated Condensing Tmp
Saturated Suction Temp
Slow Change Override
Space Temperature
Storing ICE
Strainer Maint. Done
Strainer Srvc Countdown
Strainer Srvc Interval
Suction Pressure
Suction Superheat Temp
System Cooling Demand Level
System Demand Limiting
Temperature Reset
Timed Override in effect
User Defined Analog 1
User Defined Analog 2
User Defined Analog 3
User Defined Analog 4
User Defined Analog 5
User Defined Binary 1
User Defined Binary 2
User Defined Binary 3
User Defined Binary 4
User Defined Binary 5
WSM controlling Chiller
CCN POINT
NAME
MODE_13
DUAL_IN
EMSTOP
EWT
MODE_21
MODE_18
ICE_DONE
CSP3
LEAD_TYP
DUAL_LWT
LWT
SEQ_TYPE
MODE_7
MODE_25
MODE_17
HR_MACH
CY_MACH
MODE_19
MODE_3
MODE_23
MLV_RLY
MODE_10
MIN_LEFT
DELAY
OCC
OAT
MODE
CAPA_A
CAP_T
CAPA_T
MODE_24
MODE_5
STAGE
TMP_SCTA
TMP_SSTA
MODE_9
SPT
MODE_20
ST_MAINT
ST_CDOWN
SI_STRNR
SP_A
SH_A
MODE_14
MODE_6
MODE_2
READ/
WRITE
R
R
R
R/W
R
R
R
R
R/W
R/W
R
R
R/W
R
R
R
R
R
R
R
R
R
R
R
R/W
R
R/W
R
R
R
R
R
R
R
R
R
R
R/W
R
R/W
R
R/W
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
UNITS
DEFAULT
VALUE
RANGE
On/Off
On/Off
Enabled
°F
°F
32.0
1
°F
°F
hr
min
min
0
°F
%
%
%
°F
°F
°F
hr
hr
psig
°F
Enabled/Emstop
-40-245
On/Off
On/Off
On/Off
-20-32
1-3
-40-245
-40-245
1-2
On/Off
On/Off
On/Off
0-9999
0-9999
On/Off
On/Off
On/Off
On/Off
On/Off
00:00-15:00
0-15
Yes/No
-40-245
Yes/No
0-100
0-100
0-100
On/Off
On/Off
0-99
-40-245
-40-245
On/Off
-40-245
On/Off
Yes/No
0-9999
0-9999
0-999
-40-245
1-3
ACTIVE_INACTIVE
On/Off
On/Off
On/Off
71
BACNET
OBJECT ID
BV:39
BV:29
BV:2999
BV:6
AV:6
BV:47
BV:44
BV:27
AV:55
AV:43
AV:32
AV:7
AV:77
BV:35
BV:51
BV:43
AV:57
AV:58
BV:45
BV:32
BV:49
BV:79
BV:38
AV:39
AV:42
BV:2008
AV:1003
BV:5
AV:12
AV:3
AV:11
BV:50
BV:33
AV:9
AV:16
AV:17
BV:37
AV:2007
BV:46
BV:55
AV:52
AV:51
AV:14
AV:44
AV:9006
BV:83
BV:40
BV:34
AV:2901
AV:2902
AV:2903
AV:2904
AV:2905
BV:2911
BV:2912
BV:2913
BV:2914
BV:2915
BV:31
BACNET
OBJECT NAME
mode_13_1
dual_in_1
element_stat_1
emstop_1
ewt_1
mode_21_1
mode_18_1
ice_done_1
csp3_1
lead_typ_1
dual_lwt_1
lwt_1
seq_type_1
mode_7_1
mode_25_1
mode_17_1
mr_mach_1
cy_mach_1
mode_19_1
mode_3_1
mode_23_1
mlv_rly_1
mode_10_1
min_left_1
delay_1
occ_status_1
oa_temp_1
mode_1
capa_a_1
cap_t_1
capa_t_1
mode_24_1
mode_5_1
stage_1
tmp_scta_1
tmp_ssta_1
mode_9_1
space_temp_1
mode_20_1
st_maint_1
st_cdown_1
si_strnr_1
sp_a_1
sh_a_1
cool_demand_level_1
dem_lmt_act_1
mode_14_1
mode_6_1
user_analog_1_1
user_analog_2_1
user_analog_3_1
user_analog_4_1
user_analog_5_1
user_binary_1_1
user_binary_2_1
user_binary_3_1
user_binary_4_1
user_binary_5_1
mode_2_1
APPENDIX D — MAINTENANCE SUMMARY AND LOG SHEETS
30MP Weekly Maintenance Log
Plant ___________________________
Machine Model No. ________________
DATE
OIL LEVEL
CHECK ALARMS
/ FAULTS
OPERATOR
INITIALS
REMARKS
72
73
yes/no
yes/no
yes/no
amps
yes/no
PSI
yes/no
yes/no
yes/no
yes/no
yes/no
yes/no
yes/no
yes/no
yes/no
0-100%
deg. F
Inspect and Clean Condenser Coil
General Cleaning and Tightening Connections
Check Pressure Transducers
Confirm Accuracy of Thermistors
General Tightening and Cleaning Connections
Inspect All Contactors
Check Refrigerant Charge
Verify Operation of EXVs and Record Position
Record System Superheat
UNIT
Check Oil Level
Leak Test
Inspect and Clean Cooler
Inspect Cooler Heater
Leak Test
Record Water Pressure Differential (PSI)
Inspect Water Pumps
Leak Test
ACTION
/
1
/
/
2
/
NOTE: Equipment failures caused by lack of adherence to the Maintenance Interval Requirements
are not covered under warranty.
System
Starter
Controls
Condenser
Cooler
Compressor
UNIT
SECTION
Month
Date
Operator
/
3
/
/
4
/
/
30MP Monthly Maintenance Log
5
/
6
/
ENTRY
/
7
/
Annually
Annually
Every 3 - 5 Years
/
APPENDIX D — MAINTENANCE SUMMARY AND LOG SHEETS (cont)
/
8
/
/
9
/
10
/ /
11
/ /
12
/ /
 Carrier Corporation 2013
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300078-01
Printed in U.S.A.
Form 30MP-2T
Pg 76
12-13
Replaces: 30MP-1T
START-UP CHECKLIST FOR 30MP LIQUID CHILLER
(Remove and use for job file.)
A. Preliminary Information
JOB NAME _____________________________
LOCATION _____________________________
INSTALLING CONTRACTOR _______________
DISTRIBUTOR __________________________
START-UP PERFORMED BY _______________
B. Preliminary Equipment Check (Yes or No)
Is there any shipping damage?
If so, where
_______________________________________
Was it noted on the freight bill?
 YES
 NO
Has a claim been filed with the shipper?
 YES
 NO
Will this damage prevent unit start-up?
 YES
 NO
Check power supply. Does it agree with unit?
 YES
 NO
Has the circuit protection been sized and installed properly?
 YES
 NO
Are the power wires to the unit sized and installed properly?
 YES
 NO
Has the ground wire been connected?
 YES
 NO
Are all electrical terminals tight?
 YES
 NO
Does this meet installation guide requirements?
 YES
 NO
Water system cleaned per installation guide?
 YES
 NO
Minimum flow rates verified per installation guide?
 YES
 NO
Cooler:
 YES
 NO
Condenser:
 YES
 NO
Air separation / bleed devices installed per installation guide?
 YES
 NO
 YES
 NO
System fluid volume in the loop ____________________gal (l)
In-line minimum 40-mesh strainer installed within 10 ft of the cooler/condenser water inlet?
C. Cooler Loop Freeze Protection (if required)
Gallons (liters) added:________________
Piping includes electric tape heaters if piping is exposed to temperatures below freezing?
On brine units, has the cooler fluid been properly protected from freezing to at least 15 F (8.3 C) below the lowest
anticipated leaving fluid temperature set point?
 YES
 NO
Have the main base board, energy management module (option) and control relay connections been checked for
tightness?
 YES
 NO
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300078-01
Printed in U.S.A.
Form 30MP-2T
Pg CL-1
12-13
Replaces: 30MP-1T
Has the refrigerant piping been done per the installation guide?
 YES
 NO
Piping dehydrated and evacuated per installation guide?
 YES
 NO
Unit charged per the installation guide?
 YES
 NO
Crankcase heaters have been energized for a minimum of 24 hours prior to start-up?
 YES
 NO
SIGNATURE REQUIRED
Preliminary check complete.
Installing/Mechanical Contractor_______________________________________Date____________
C. Unit Start-Up (qualified individuals only, factory start-up recommended)
(insert check mark as each item is completed)
EQUIPMENT:
Chiller:
MODEL NO.
SERIAL NO.
COMPRESSORS:
CIRCUIT A
MODEL NO.
SERIAL NO.
Chiller has been properly interlocked with the auxiliary contacts of the chilled fluid pump starter.
 YES
 NO
Chiller has been properly interlocked with the auxiliary contacts of the condenser water pump starter
(30MPA units only).
 YES
 NO
Compressor oil level is correct.
 YES
 NO
Liquid line service valve is back seated (30MPA units only).
 YES
 NO
Set point should be adjusted to the desired cooler leaving fluid temperature.
Leak check thoroughly: check all compressors, condenser manifolds and headers, TXVs, solenoid valves, filter
driers, fusible plugs, thermistors, and cooler connections using electronic leak detector. Locate, repair, and report
any refrigerant leaks.
Check voltage imbalance: AB_________ AC_________ BC_________
AB + AC + BC (divided by 3) = average voltage = ____________
Maximum deviation from average voltage =____________
Voltage imbalance = (max. Deviation) x 100 = % voltage imbalance
average voltage
If over 2% voltage imbalance, do not attempt to start chiller! Call local power company for assistance.
Incoming power voltage to chiller modules is within rated unit voltage range?
CL-2
 YES
 NO
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
(30MPA ONLY)
CHECK PRESSURE DROP ACROSS COOLER.
Fluid entering cooler: psig (kpa)____________
Fluid leaving cooler: psig (kpa)_______________
(psig difference) x 2.31 = ft of fluid pressure drop =____________
Plot cooler pressure drop on performance data chart (located in installation Instructions literature) to determine
total gpm (l/s).
Total gpm (l/s) =______________ Unit's rated min gpm (l/s) =___________________
Job's specified gpm (l/s) (if available):
NOTE: If unit has low fluid flow, find source of problem: check fluid piping, in-line fluid strainer, shut-off valves,
chilled water pump rotation, etc.
VISUALLY CHECK MAIN BASE BOARD FOR THE FOLLOWING:
Inspect all thermistors and transducers for possible crossed wires. Check to be sure all well-type thermistors are
fully inserted into their respective wells.
TO START THE CHILLER:
Turn the emergency on/off switch (SW2) to on position.
Turn the enable/off/remote contact switch (SW1) to the enable position.
If equipped with the optional scrolling marquee, leave the enable/off/remote contact switch (SW1) in the off
position.
NOTE: Use escape key to go up one level in the structure.
Use arrow/escape keys to illuminate run status led. Press ENTER key until 'vers' is displayed. Press ENTER key.
Record information.
CL-3
Record Software Versions
MODE — RUN STATUS
SOFTWARE VERSION NUMBERS
VERS
MBB
CESR131482-xx-xx
EMM
CESR131174-xx-xx
AUX1
CESR131333-xx-xx
MARQ
CESR131171-xx-xx
NAVI
CESR130227-xx-xx
(Press ENTER and ESCAPE simultaneously to obtain software versions)
Use arrow/escape keys to illuminate configuration led. press enter key. record information below.
UNIT (Configuration Settings)
SUBMODE
UNIT
ITEM
TYPE
SIZE
SZA.1
SZA.2
SZA.3
A1.TY
MAX.T
ITEM EXPANSION
UNIT CONFIGURATION
UNIT TYPE
UNIT SIZE
COMPRESSOR A1 SIZE
COMPRESSOR A2 SIZE
COMPRESSOR A3 SIZE
COMPRESSOR A1 DIGITAL?
MAXIMUM A1 UNLOAD TIME
DISPLAY
ENTRY
XXX
XX
XX
XX
NO/YES
XX
Press ESCAPE key to display ‘UNIT’. Press down arrow key to display ‘OPT1’.
Press ENTER key. Record configuration information below:
OPTIONS1 (Options Configuration)
SUBMODE
OPT1
ITEM
FLUD
MLV.S
RG.EN
OAT.E
CSB.E
CPC
PM.DY
D.PM.E
D.FL.S
CDWS
ITEM EXPANSION
UNIT OPTIONS 1 HARDWARE
COOLER FLUID
MINIMUM LOAD VALVE SELECT
RETURN GAS SENSOR ENABLE
ENABLE OAT SENSOR
CSB BOARDS ENABLE
COOLER PUMP CONTROL
COOLER PUMP SHUTDOWN DLY
ENABLE CONDENSER PUMP
ENABLE COND FLOW SWITCH
ENABLE COND WTR SENSORS
Press ESCAPE key to display ‘OPT1’. Press down arrow key to display ‘OPT2’.
Press ENTER key.
Record configuration information on next page.
CL-4
DISPLAY
X
NO/YES
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
OFF/ON
XX MIN
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
ENTRY
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
C. Unit Start-Up (cont)
C. Unit Start-Up (cont)
OPTIONS2 (Options Configuration)
SUBMODE
OPT2
ITEM
ITEM EXPANSION
UNIT OPTIONS 2 CONTROLS
CONTROL METHOD
HIGH LCW ALERT LIMIT
MINUTES OFF TIME
ICE MODE ENABLE
CTRL
LCWT
DELY
ICE.M
DISPLAY
ENTRY
X
XX.X F
XX
DSBL/ENBL
Press ESCAPE key to display ‘OPT2’. Press down arrow key to display ‘CCN’.
Press ENTER key.
Record configuration information below.
CCN (CCN Network Configuration)
SUB-MODE
CCN
ITEM
ITEM EXPANSION
DISPLAY
CCNA
CCN ADDRESS
XXX
CCNB
CCN BUS NUMBER
XXX
BAUD
CCN BAUD RATE
X
ENTRY
Press ESCAPE key several times to get to the mode level (blank display). Use the arrow keys to scroll to the set
point led. press ENTER to display setpoints.
Record configuration information below:
SETPOINT
SUBMODE
COOL
HEAD
FRZ
ITEM
CSP.1
CSP.2
CSP.3
H.DP
BR.FZ
ITEM EXPANSION
COOLING SETPOINTS
COOLING SETPOINT 1
COOLING SETPOINT 2
ICE SETPOINT
HEAD PRESSURE SETPOINTS
HEAD SET POINT
BRINE FREEZE SETPOINT
BRINE FREEZE POINT
DISPLAY
ENTRY
XXX.X °F
XXX.X °F
XXX.X °F
XXX.X °F
XX.X °F
COMPONENT TEST
USE ESCAPE/ARROW KEYS TO ILLUMINATE CONFIGURATION LED. PRESS ENTER TO DISPLAY 'DISP'.
PRESS ENTER AGAIN TO DISPLAY 'TEST' FOLLOWED BY 'OFF'. PRESS ENTER TO STOP DISPLAY AT
'OFF' AND ENTER AGAIN SO 'OFF' DISPLAY FLASHES. 'PASS' AND 'WORD' WILL FLASH IF PASSWORD
NEEDS TO BE ENTERED. PRESS ENTER TO DISPLAY 'PASSWORD' FIELD AND USE THE ENTER KEY FOR
EACH OF THE FOUR PASSWORD DIGITS. USE ARROW KEYS IF PASSWORD IS OTHER THAN STANDARD.
AT FLASHING 'OFF' DISPLAY, PRESS THE UP ARROW KEY TO DISPLAY 'ON' AND PRESS ENTER. ALL LED
SEGMENTS AND MODE LEDS WILL LIGHT UP. PRESS ESCAPE TO STOP THE TEST. PRESS ESCAPE TO
RETURN TO THE 'DISP' DISPLAY. PRESS THE ESCAPE KEY AGAIN AND USE THE ARROW KEYS TO ILLUMINATE THE SERVICE TEST LED. PRESS ENTER TO DISPLAY 'TEST'. PRESS ENTER TO STOP DISPLAY AT
'OFF' AND ENTER AGAIN SO 'OFF' FLASHES. PRESS THE UP ARROW KEY AND ENTER TO ENABLE THE
MANUAL MODE. PRESS ESCAPE AND DISPLAY NOW SAYS 'TEST' 'ON'. TURN SWITCH (SW1) TO THE
ENABLE POSITION.
PRESS THE DOWN ARROW TO DISPLAY 'OUTS'. PRESS THE ENTER KEY TO DISPLAY 'LL.SV'. PRESS THE
ENTER KEY TO STOP DISPLAY AT 'OFF' AND ENTER AGAIN SO 'OFF' FLASHES. PRESS THE UP ARROW
KEY AND ENTER TO TURN THE OUTPUT ON. PRESS ENTER SO THE 'ON' DISPLAY FLASHES, PRESS THE
DOWN ARROW KEY AND THEN ENTER TO TURN THE OUTPUT OFF. OUTPUTS WILL ALSO BE TURNED
OFF OR SENT TO 0% WHEN ANOTHER OUTPUT IS TURNED ON. CHECK OFF THE ITEMS IN THE SERVICE
TEST TABLE ON THE NEXT PAGE THAT APPLY AFTER BEING TESTED.
CL-5
USE ESCAPE KEY TO RETURN TO ‘OUTS’ DISPLAY. PRESS DOWN ARROW TO DISPLAY ‘CMPA’.
PRESS ENTER KEY TO DISPLAY ‘CC.A1’. NOTE THAT UNLOADERS AND HOT GAS BYPASS SOLENOIDS
CAN BE TESTED BOTH WITH AND WITHOUT COMPRESSOR(S) RUNNING. MAKE SURE ALL SERVICE
VALVES ARE OPEN AND COOLER/CONDENSER PUMPS HAVE BEEN TURNED ON BEFORE STARTING
COMPRESSORS. CHECK OFF EACH ITEM AFTER SUCCESSFUL TEST. THE CONTROL WILL ONLY START
ONE COMPRESSOR PER MINUTE. WHEN AT THE DESIRED ITEM, PRESS THE ENTER KEY TWICE TO
MAKE THE ‘OFF’ FLASH. PRESS THE UP ARROW KEY AND ENTER TO TURN THE OUTPUT ON. CHECK
OFF THE ITEMS IN THE SERVICE TEST TABLE BELOW THAT APPLY AFTER BEING TESTED.
SERVICE TEST
SUB-MODE
KEYPAD
ENTRY
ITEM
DISPLAY
OFF/ON
ENTER
ITEM
EXPANSION
SERVICE TEST MODE
TEST
COMMENT
Completed
(Yes/No)
To Enable Service Test Mode,
move Enable/Off/Remote
Contact switch to OFF. Change
TEST to ON. Move switch to
ENABLE.
OUTPUTS AND PUMPS
ENTER
OUTS
CLR.P
OFF/ON
COOLER PUMP RELAY
CND.P
OFF/ON
CONDENSER PUMP
UL.TM
0 TO 15
COMP A1 UNLOAD TIME
CC.H
OFF/ON
CRANKCASE HEATER
CW.VO
OFF/ON
CONDENSER VALVE OPEN
CW.VC
OFF/ON
CONDENSER VALVE CLOSE
LL.SV
OFF/ON
LIQUID LINE SOLENOID
RMT.A
OFF/ON
REMOTE ALARM RELAY
CC.A1
OFF/ON
COMPRESSOR A1 RELAY
UL.TM
0 TO 15
COMP A1 UNLOAD TIME
CC.A2
OFF/ON
COMPRESSOR A2 RELAY
CC.A3
OFF/ON
COMPRESSOR A3 RELAY
MLV
OFF/ON
MINIMUM LOAD VALVE RELAY
CIRCUIT A COMPRESSOR TEST
ENTER
CMPA
Use arrow/escape keys to illuminate the temperatures led. Press ENTER to display 'UNIT'. Press ENTER and use
the arrow keys to record temperatures for sensors below.
TEMPERATURE
CLWT
CEWT
CDET
CDLT
OAT or DLWT
SPT
CL-6
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
C. Unit Start-Up (cont)
C. Unit Start-Up (cont)
ALL UNITS:
Measure the following (measure while machine is in a stable operating condition): Check and adjust superheat as
required.
CIRCUIT A
DISCHARGE PRESSURE
SUCTION PRESSURE
DISCHARGE LINE TEMP
SUCTION LINE TEMP
COOLER ENTERING FLUID
COOLER LEAVING FLUID
CONDENSER ENTERING FLUID
CONDENSER LEAVING FLUID
Check and adjust superheat as required.
COMMENTS:
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
SIGNATURES:
START-UP TECHNICIAN _____________________________ DATE_______________________________
CUSTOMER REPRESENTATIVE ______________________ DATE_______________________________
CL-7
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300078-01
Printed in U.S.A.
Form 30MP-2T
Pg CL-8
12-13
Replaces: 30MP-1T
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
 Carrier Corporation 2013