AquaSnap 30MP MPW015-045 Liquid Chiller User Manual
The 30MP MPW015-045 Liquid Chiller is a water-cooled chiller equipped with ComfortLink controls and conventional thermostatic expansion valves (TXVs). It features a microprocessor-based electronic control system, enabling precise temperature regulation and energy efficiency.
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AquaSnap
®
30MPA,MPW015-045
Liquid Chillers with Scroll Compressors and ComfortLink Controls
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 ENTERING FLUID SENSOR
• CONDENSER LEAVING FLUID SENSOR
• CONDENSER ENTERING FLUID 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
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
• 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
Controls, Start-Up, Operation,
Service, and Troubleshooting
Page
START-UP AND OPERATION . . . . . . . . . . . . . . . . . 27-29
Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Check Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . 27
Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . 29
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-34
Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . 29
Compressor Replacement . . . . . . . . . . . . . . . . . . . . . . . 29
30MPW Condenser and 30MP Cooler . . . . . . . . . . . . 30
• BRAZED-PLATE COOLER AND CONDENSER
• BRAZED-PLATE COOLER AND CONDENSER
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Check Refrigerant Feed Components . . . . . . . . . . . 30
• THERMOSTATIC EXPANSION VALVE (TXV)
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
• UNIT ENABLE-OFF-REMOTE CONTACT SWITCH
• CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN
• OPEN 24-V CONTROL CIRCUIT BREAKERS
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
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.
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.
WARNING
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.
WARNING
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
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
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.
CAUTION
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
Compressors require specific rotation. Monitor control alarms during first compressor start-up for reverse rotation protection. Damage to unit may result.
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
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).
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.
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 menu structure.
ENTER to move into the next level of the
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 OPT1MLV.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.
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
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
3 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.
Once within a mode or sub-mode, pressing the and ESCAPE
ENTER
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 text mode.
ESCAPE key to exit out of the expanded
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.
MODE
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
Alarm Status
ESCAPE ENTER
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 it. Press the ESCAPE
ENTER key to accept
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 ‘PASS’ and ‘WORD’ will alternate on the display when required. The default password is 0111.
Press ENTER
ENTER
and the 1111 password will be displayed. Press
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.
See Table 3 and Appendix A for further details.
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
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.
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.
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 it. Press the ESCAPE
ENTER key to accept
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.
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 to the Configuration mode. Press this mode. The display will read:
ENTER to obtain access to
> 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.
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 mode. The display will read:
ENTER to obtain access to this
> 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.
Comf ort
Link
MODE
Run Status
Service
Test
Temper atur es
Pressures
Setpoints
Inputs
Outputs
Configur ation
ESC
Oper
Alar ms ating M odes
Alar m Status
ENTER
Fig. 2 — Accessory Navigator™ Display Module
4
Table 2 — Scrolling Marquee Display Menu Structure*
MODE
SUB-MODE
RUN
STATUS
Auto
View of
Run Status
(VIEW)
Unit Run
Hour and
Start
(RUN)
Circuit and
Compressor
Run Hours
(HOUR)
SERVICE
TEST
Service
Test Mode
(TEST)
Outputs and Pumps
(OUTS)
Ciruit A Comp
Test
(CMPA)
Compressor
Starts
(STRT)
Preventive
Maintenance
(PM)
TEMPERATURES PRESSURES
Unit Temperatures
(UNIT)
Pressures
Circuit A
(PRC.A)
SET
POINTS
Cooling
Setpoints
(COOL)
Temperatures
Circuit A
(CIR.A)
Head
Pressure
Setpoint
(HEAD)
Brine
Freeze
Setpoint
(FRZ)
Software
Version
(VERS)
INPUTS OUTPUTS CONFIGURATION
General
Inputs
(GEN.I)
Circuit
Inputs
(CRCT)
4-20mA
Inputs
(4-20)
General
Outputs
(GEN.O)
Outputs
Circuit A
(CIR.A)
Display
Configuration
(DISP)
Unit
Configuration
(UNIT)
Unit Options 1
Hardware
(OPT1)
Unit Options 2
Controls
(OPT2)
CCN Network
Configuration
(CCN)
Reset Cool Temp
(RSET)
Set Point and
Ramp Load
(SLCT)
Service
Configuration
(SERV)
Broadcast
Configuration
(BCST)
TIME
CLOCK
Time of
Day
(TIME)
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)
OPERATING
MODES
Modes
(MODE)
ALARMS
Current
(CRNT)
Reset
Alarms
(RCRN)
Alarm
History
(HIST)
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
MODE
NO.
01
02
03
05
06
07
09
10
13
14
15
16
17
18
19
20
21
ITEM EXPANSION
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 LIMITED
COOLER FREEZE PROTECTION
LOW TEMPERATURE COOLING
HIGH TEMPERATURE COOLING
MAKING ICE
STORING ICE
HIGH SCT CIRCUIT A
MINIMUM COMP ON TIME
23
PUMP OFF DELAY TIME
24
25 LOW SOUND MODE
LEGEND
CSM — Chillervisor System Manager
SCT — Saturated Condensing Temperature
WSM — Water System Manager
Table 3 — Operating Modes
DESCRIPTION
Chillervisor System Manager (CSM) is controlling the chiller.
Water System Manager (WSM) is controlling the chiller.
Dual Chiller control is enabled.
Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature
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 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.
Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Sat-
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.
Slow change override is in effect. The leaving fluid temperature is close to and moving towards the control point.
Chiller is being held off by Minutes Off Time (Configuration
OPT2
DELY).
CSP.1) during occupied periods and Cooling Set Point 2 (Set Points during unoccupied periods.
COOL
COOL
CSP.2)
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.
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 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.
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.
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.
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.
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.
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.
OPT1
PM.DY).
Operating mode does not apply to 30MP chillers.
6
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).
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
7 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.
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).
* Registered trademark of DuPont.
LEGEND FOR FIG. 3-5
DTT
DUS
EMM
EWT
FB
FIOP
FU
GND
HPS
LLSV
LON
LVT
LWT
MBB
MLV
MP
ALMR — Alarm Relay
AUX — Auxilliary
C
CB
— Contactor, Compressor
— Circuit Breaker
CCB
CH
CCH
CNFS
— Compressor Circuit Breaker
— Crankcase Heater
— Crankcase Heater Relay
— Condenser Water Flow Switch
CNPI — Condenser Pump Interlock
COMP — Compressor
CR
CSB
— Control Relay
— Current Sensor Board
CWFS — Chilled Water Flow Switch
CWP — Chilled Water Pump
DGS
DPT
— Digital Scroll Compressor
— Discharge Pressure Transducer
NEC
OAT
PL
RLY
SPT
SW
TB
TRAN
UPC
— 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
DISCONNECT
OPTION CB1A/TB1A
L1 L2 L3
EQUIP
GND
CCB-1 CCB-2 CCB-3
TB3
UPC LON
OPTION
UPC
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
LVT
8 7 6 5 4 3 2 1
EMM
CSB-A1 CSB-A2 CSB-A3
2 4 6
CA1 CA2 CA3
CCH
TRAN1
MBB
FB1 a30-4963
LOCATED OVER EMM
CB1 CB2
REMOTE
CONTROL
SW1
ENABLE
OFF
Fig. 3 — Typical Control Box — 30MP015-045 Units
CB3
SW2
OFF
ON
9
015,020,040: 208/230V ONLY 030,045: 202/230V,380V ONLY
TRAN SIZE
FUSE NUMBER
NOT USED ON 380V UNITS
380V UNITS ONLY
8. MP-A1 NOT USED IN THE FOLLOWING UNITS: 015,020: ALL UNITS 9. MP-A2 NOT USED IN THE FOLLOWING UNITS: 015,020: ALL UNITS
1. FACTORY WIRING IS IN ACCORDANCE WITH UL 1995 STANDARDS. ANY FIELD MODIFICATIONS OR ADDITIONS MUST BE IN COMPLIANCE WITH ALL APPLICABLE CODES.
3. ALL FIELD INTERLOCK CONTACTS MUST HAVE A MIN RATING OF 2 AMPS 4. COMPRESSOR AND FAN MOTORS ARE THERMALLY PROTECTED-- THREE PHASE MOTORS PROTECTED AGAINST PRIMARY SINGLE PHASE CONDITIONS.
OF REMOTE ON-OFF. THE CONTACT MUST BE RATED FOR DRY CIRCUIT APPLICATION CAPABLE OF HANDLING A 5VDC 1 MA TO 20 MA LOAD.
6. FOR 500 SERIES UNIT OPERATION AT 208-3-60V LINE VOLTAGE, TRAN1 PRIMARY CONNECTIONS MUST BE MOVED TO TERMINALS H3
STANDARD TERMINAL
TO FUSED DISCONNECT
PER NEC
TO FUSED
DISCONNECT
PER NEC
CONNECT FOR APPROPRIATE PRIMARY VOLTAGE SEE TABLE 1
10 a30-4965
J10A
MBB
RLY 11
RLY 9
RLY 10
J10B
RLY 5
RLY 6
RLY 7
RLY 8
RLY 1
RLY 2
RLY 3
RLY 4
8
9
10
6
7 ORN
1
2
8
9
ORN
3
4
ORN
5
1
2
3
ORN
ORN
4
5
6
ORN
7
15
16
17
18
11
12
13
14 BLK
BLK
10
11
12
8
9
13
14
15
16
17
18
19
1
2
3
4
5
6
7
25
26
23
24
27
20
21
22
CWPI
(SEE
NOTE
12)
REMOTE
ON-OFF
SWITCH
(SEE
NOTE 5)
14 7
8
13 9
DUAL
SETPOINT
12 10
11
CNPI
12
CNFS
11 13
RED
WHT
BLK
LVT
J1
J13
4
5
1
2
3
6
7
8
RED
BLK
WHT
17
LVT
J11
2
3
4
16 5
15 6
14
BLK
WHT
RED
BRN
RED
BLK
WHT
RED
UPC
PORT 2
1 NET +
2
3
4
NET -
N/C
N/C
5 SIGNAL
PORT 1A
1
2
3
NET +
NET 2
SHIELD
LON
OPTION
J3 GND
NET
J4
1
2
UPC OPT
BLK
CB2
3.2 AMPS
RED
4
3
6
5
2
1
4
3
6
5
2
1
ORN
ORN
A2
SW2
B2
C2
CB1
3.2 AMPS
RED
GRA
PNK
BLU
ORN
PNK
RED
BLK
BLU
HPS-A
ORN
GRA
VIO
GRA
J6
BLK
4 CWFS 2
WHT
10
10
VIO
9
RED
8
OFF
ORN
A1
B1
SW1
ENABLE
C1
RED
7
6
9
8
7
6
5
5
BLU
4
4
BLU
3
3
VIO
2
2
1
1
J7
MAIN
BASE
BOARD
J3
J9
BRN
RED
10
9
8
BLK
7
WHT
RED
6
5
BLK
4
3
WHT
RED
2
1
4
3
6
5
2
1
8
7
10
9
J5
BLK
J4
PNK
1
2
3
4
5
6
1
2
3
4
5
6
RED
WHT
BLK
BRN
RED
RED GRA BRN
LLSV-A
(MPA AND BRINE ONLY)
BLU
PL1-1
VIO
SEE NOTE 11
PL2-1
VIO
SEE NOTE 11
PL3-1
VIO
SEE NOTE 11
M1
MP-A1
M2
VIO
M1
MP-A2
M2
VIO
M1
MP-A3
M2
VIO
PL1-2
VIO
PL2-2
VIO
PL3-2
VIO
ORN
GRA
VIO
C1 CCH C2
(MPA ONLY)
C1
C1
CA1
CA2
C2
C2
C1 CA3 C2
(040,045 ONLY)
GRA GRA
MLV-A
MLV FIOP
PNK
BRN
PNK BRN
1
CWFS
3
BLU BRN
PNK
PL1-3
RED T2
SEE NOTE 8
MP-A1 T1
PL1-4
BRN
PNK
PL2-3
RED T2
SEE NOTE 9
MP-A2 T1
PL2-4
BRN
PNK
PL3-3
RED T2
SEE NOTE 10
MP-A3 T1
PL3-4
BRN
RED
WHT
BLK
RED
BRN
3
4
1
2
5
6
3
4
1
2
5
6
MARQUEE
DISPLAY
J8
PNK
PNK
1
2
3
4
1
2
3
4
RED
WHT
BLK
5
6
7
8
9
10
11
12
1
2
3
4
1
2
3
4
5
6
RED
ORN
7
8
BRN
RED
9
10
ORN
BRN
11
12
RED
ORN
BRN
2
3
4
1
4
5
6
1
2
3
7
8
9
10
11
12
2
3
4
5
6
1
1
2
3
4
6
7
8
9
10
11
12
13
14
15
16
17
18
3
4
5
1
2
24
25
26
22
23
19
20
21
BLU
VIO
RED
RED
BLK
RED
BLK
RED
GRN
BLK
RED
GRN
BLK
B
C
A
B
C
A
2
3
3
1
1
1
2
2
3
CSB
A2
CSB
A3
CSB
A1
(040,045 ONLY)
CONDENSER EWT
ACCESSORY
CONDENSER LWT
ACCESSORY
J12
LVT
T55
3 23
4
5
22
21
RGTA
ACCESSORY
-
+
-
+
RED
J12
LVT
1 25
2 24
J12
6 20
7 19
J11
1 18
COOLER ENTERING
FLUID TEMP
COOLER LEAVING
FLUID TEMP
DPTA
SPTA
XF FU3
TRAN1
X1 SECONDARY 24V X2
GRN/YEL
BRN
ALMR
ALARM RELAY
SEE NOTE 7
CR
CWP RELAY
SEE NOTE 7
OAT ACCESSORY OR
DUAL CHILLER LWT a30-5339
CR
SEN
T-55
ACCSY
TB3
1
2
3
BLK
WHT
RED
4
3
6
5
2
1
AUX2
1
3
3
2
2
1
-
-
G
+
G
+ J9
DGS
FIOP
J2 -
CH1
7
8
J6 CH11
-
1
2
1 2 3 4 5 6 7 8
DARK = SWITCH LOCATION
ON
OFF
7
8
VIO
BRN
1
2
RED
BLK
BLK
WHT
RED
2
1
4
3
2
1
4
3
BLK
WHT
RED
2
1
4
3
2
1
4
3
BRN X2 TRAN1
BRN
BRN
1 TB3
CWFS-3
LLSV-A
BRN
BRN
3 TB3
MLV-A
BRN
BRN
BRN
BRN
C2 CA3
MLV-A
PL1-4
PL2-4
BRN
BRN
BRN
BRN
BRN
BRN
PL2-4
PL3-4
C2 CCH
PL3-4
C2
LLSV-A
CCH
BRN 2 TB3
BRN C2 CA1
BRN
BRN
BRN
BRN
C2 CA1
C2 CA2
C2
C2
CA2
CA3
J3
EMM
J4
FIOP/
ACCESSORY
J7
J6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
5
6
7
8
9
10
11
12
1
2
3
4
3
4
1
2
VIO
BRN
5
6
ORN
7
8
9
10
11
12
PNK
9
10
11
12
13
14
3
4
5
6
7
8
1
2
GRA
GRA
RED
RED
BLU
BLU
5
4
3
10
9
8
7
6
2
1
7
8
9
10
DUS
DTT
J10
LVT
17
16
15
14
13
12
11
5
6
3
4
1
2
ICE DONE
DLS STEP 1
DLS STEP 2
+
-
DEMAND
LIMIT
4-20mA
+
-
TEMP
RESET
4-20mA
+
-
COOLING
SETPOINT
4-20mA
Fig. 5 — Typical Control Wiring Schematic — 30MP015-045 Units
11
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.
Table 4 — Thermistor Designations
SCROLLING
MARQUEE
THERMISTOR
DISPLAY
NAME
CLWT
CEWT
D.GAS
RGTA
OAT/DLWT
SPT
CDET
CDLT
PIN
CONNECTION
POINT
THERMISTOR INPUT
J8-13,14 (MBB) Cooler Leaving Fluid
J8-11,12 (MBB) Cooler Entering Fluid
J6-12 (AUX2) Discharge Temperature
Thermistor (Digital Compressor Option Only)
J8-9,10 (MBB) Circuit A Return Gas
Temperature (accessory)
J8-6,7 (MBB),
LVT-21,22
J8-5,6 (MBB)
LVT-22,23
J8-1,2 (MBB)
Outdoor-Air Temperature
Sensor (accessory) or Dual
LWT Sensor
Accessory Remote Space
Temperature Sensor
J8-3,4 (MBB)
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
8205
D6451
—
A48301
884421
—
M13402
6130
M64430
—
Sensors —
The electronic control uses 2 to 7 thermistors to 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 SEN-
SOR (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.
12
Table 8 — Thermistors and Wells
THERMISTOR
PART NO.
HH79NZ014
HH79NZ029
DESCRIPTION
3 in., 5,000 ohm
Thermistor
4 in., 5,000 ohm
Thermistor
WELL PART NO.
1DHB50106801
1DHB50106802
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)
CEPL130346-01
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):
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.
YELLOW LED -
CCN (CARRIER COMFORT NETWORK)
INSTANCE JUMPER
K11 K10 K9
J1
J4
J2
J3
J6
J5
LEN
STATUS
CCN
J7
K8 K7 K6 K5
K4 K3 K2 K1
J8
Fig. 6 — Main Base Board
J9
J10 a30-4967
Fig. 7 — Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations
13
SPT (T10) PART NO. 33ZCT55SPT
SENSOR
SEN SEN a30-4968
Fig. 8 — Typical Space Temperature
Sensor Wiring
T-55 SPACE
SENSOR
TO CCN
COMM 1
BUS (PLUG)
AT UNIT
CCN+
CCN GND
CCN-
6
5
4
3
2
1
LVT
3
4
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.
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
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.
Loss-of-Cooler Flow Protection —
A proof-ofcooler flow device is factory installed in all chillers.
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.
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 abso-
lutely necessary.
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
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.
OPT2 MINUTES OFF TIME (Configuration
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
CEBD430351-0396-01C
J1 J2 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.
J4 J3
STATUS
LEN
J5
J7
J6
RED LED - STATUS
GREEN LED -
LEN (LOCAL EQUIPMENT NETWORK)
Fig. 10 — Energy Management Module
ADDRESS
DIP SWITCH
TEST 2
15
Table 9 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve
30MP UNIT SIZE
015
020
030
040
045
*Hot gas bypass (minimum load) valve energized.
CONTROL
STEPS
1
2
3
1
2
3
1
2
3
4
1
2
3
1
2
3
4
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
8
7
6
5
47
46
45
44
43
42
41
0
LEGEND
LWT — Leaving Water Temperature
STANDARD
DEADBAND
200 400
TIME (SECONDS)
600
Fig. 11 — Deadband Multiplier
170
800 1000
3 STARTS
MODIFIED
DEADBAND
150
140
80
70
60
50
120
110
100
90
40
30
-30 -20 -10 0 10 20 30 40 50 60
SCT —
SST —
LEGEND
Saturated Condensing Temperature
Saturated Suction Temperature
SST (F)
Fig. 12 — Operating Envelope for R-410A Compressor
16
70 80 a30-4969
Ramp Loading — Ramp loading (Configura- tion 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.
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
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.
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
Point switch contacts are open and Cooling Set Point 2 (Set
Points COOL
COOL CSP.1) when the Dual Set
CSP.2) when they are closed.
CCN
Cooling Set Point 1 (Set Points
Occupied mode and Cooling Set Point 2 (Set
Points COOL
COOL CSP.1) during the
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).
Table 10 — Control Methods and Cooling Set Points
CONTROL
3 (CCN)
TYPE
(CTRL)
0 (switch)
2 (Occupancy)
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
(dual, switch)
2
(dual, occ)
ON*
ON*
ON*
OFF
ON*
ON*
ON,CSP.1
ON,CSP.2
Illegal
Illegal
ON,CSP.1
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†
Cooler Pump Control —
The AquaSnap ® 30MP machines are configured with the Cooler Pump Control (Configu- ration 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.
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.
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.
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.
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 for condenser pump control and additional configuration is required. To enable the condenser pump control use Configura- tion
TYPE = 3 (water cooled), then the output will be used
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).
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.
18
SUB-MODE
DISP
UNIT
OPT1
ITEM
Table 11 — Dual Chiller Configuration (Master Chiller Example)
KEYPAD ENTRY DISPLAY ITEM EXPANSION
OPT2
CCN
RSET
CTRL
CCNA
CCNB
LLEN
LLEN
MSSL
SLVA
SLVA
LLBL
ENTER
ENTER
ESCAPE
ENTER
ENTER
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ENTER
ENTER
ESCAPE
ENTER
ENTER
2
SLVA
LLBL
0
0
2
SLVA
0
0
2
LLEN
MSSL
MAST
MSSL
DSBL
DSBL
ENBL
ENBL
CCN
RSET
CRST
LLEN
CTRL
0
OPT2
CCN
1
CCNB
0
CONTROL METHOD
SWITCH
CCN ADDRESS
CCN BUS NUMBER
COOLING RESET TYPE
LEAD/LAG CHILLER ENABLE
LEAD/LAG CHILLER ENABLE
MASTER /SLAVE SELECT
MASTER /SLAVE SELECT
SLAVE ADDRESS
SLAVE ADDRESS
LEAD/LAG BALANCE SELECT
COMMENTS
DEFAULT 0
DEFAULT 1
DEFAULT 0
PROCEED TO
SUBMODE RESET
15 ITEMS
SCROLLING STOPS
VALUE FLASHES
SELECT ENBL
CHANGE ACCEPTED
DEFAULT MAST
SCROLLING STOPS
VALUE FLASHES
SELECT 2
CHANGE ACCEPTED
SCROLLING STOPS
VALUE FLASHES
SELECT 2 - Automatic
19
SUB-MODE
RSET
ITEM
LLBL
Table 11 — Dual Chiller Configuration (Master Chiller Example) (cont)
KEYPAD ENTRY
ENTER
DISPLAY
2
ITEM EXPANSION
LEAD/LAG BALANCE SELECT
COMMENTS
CHANGE ACCEPTED
ESCAPE
LLBL
LLBD
ENTER
LEAD/LAG BALANCE DELTA
LEAD/LAG BALANCE DELTA DEFAULT 168
LLDY
LLDY
ESCAPE
ENTER
ENTER
ENTER
ESCAPE
ESCAPE
10
10
5
5
LLBD
168
LLBD
LLDY
LLDY
RSET
LAG START DELAY
LAG START DELAY
SCROLLING STOPS
VALUE FLASHES
SELECT 10
CHANGE ACCEPTED
PARA
ENTER
YES 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.
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 ration CCN have Lead/Lag Chiller Enable (Configuration
CCN
CCNB) but cannot have the same CCN address (Configu-
CCNA). Both master and slave chillers must
RSET
LLEN) configured to ENBL. Master/Slave Select (Config-
RSET MSSL) must be configured to MAST for uration 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 ance Delta (Configuration chiller run-times weekly. The Lag Start Delay (Configura- tion RSET
RSET
LLBL) and Lead/Lag Bal-
RSET LLBD) to even out the
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.
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).
RETURN
FLUID
*Depending on piping sizes, use either:
• HH79NZ014 sensor/10HB50106801 well (3-in. sensor/well)
• HH79NZ029 sensor/10HB50106802 well (4-in. sensor/well)
PART
NUMBER
MASTER
CHILLER
SLAVE
CHILLER
THERMISTOR
WIRING*
LEAVING
FLUID
INSTALL DUAL CHILLER LWT
LEAVING FLUID TEMPERATURE
THERMISTOR (T10) HERE
Fig. 13 — Dual Chiller Thermistor Location
10HB50106801
DIMENSIONS in. (mm)
A B
3.10 (78.7) 1.55 (39.4)
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.
10HB50106802
A
1/4 N.P.T.
B
4.10 (104.1) 1.28 (32.5)
0.505/0.495
6” MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
Fig. 14 — Dual Leaving Water Thermistor Well
0.61
DIA
20
Table 12 — Dual Chiller Configuration (Slave Chiller Example)
KEYPAD ENTRY DISPLAY ITEM EXPANSION SUB-MODE
DISP
UNIT
OPT1
ITEM
OPT2
CCN
RSET
CTRL
CCNA
CCNA
CCNB
ENTER
ESCAPE
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
LLEN
ENTER
LLEN
MSSL
ENTER
ENTER
ESCAPE
ENTER
ENTER
MSSL
MAST
MAST
SLVE
DSBL
ENBL
ENBL
LLEN
MSSL
ENTER
SLVE
MSSL
ESCAPE
ESCAPE
RSET
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.
RSET
CRST
LLEN
DSBL
2
CCN
0
CCN
CTRL
0
OPT2
CCN
CCNA
1
1
2
CONTROL METHOD
SWITCH
CCN ADDRESS
CCN ADDRESS
CCN BUS NUMBER
COOLING RESET TYPE
LEAD/LAG CHILLER ENABLE
LEAD/LAG CHILLER ENABLE
MASTER /SLAVE SELECT
MASTER /SLAVE SELECT
COMMENTS
DEFAULT 0
SCROLLING STOPS
VALUE FLASHES
SELECT 2
(SEE NOTE 2)
CHANGE ACCEPTED
DEFAULT 0
(SEE NOTE 3)
PROCEED TO
SUBMODE RSET
15 ITEMS
SCROLLING STOPS
VALUE FLASHES
SELECT ENBL
CHANGE ACCEPTED
SCROLLING STOPS
VALUE FLASHES
SELECT SLVE
CHANGE ACCEPTED
SLAVE COMPLETE
21
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
(Configuration
RSET
RSET
RM.F), and (Configuration
RSET
RSET
CRST),
RM.NO), (Configuration
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
(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
(Run Status
VIEW
VIEW
SETP) from the Control Point
CTPT) to determine the degrees reset.
Table 13 — Menu Configuration of 4 to 20 mA Cooling Set Point Control
MODE
(RED LED)
KEYPAD
ENTRY
SUB-MODE
KEYPAD
ENTRY
ENTER
DISP
ITEM DISPLAY
ITEM
EXPANSION
COMMENT
UNIT
OPT1
OPT2
CONFIGURATION
CCN
RSET
SLCT ENTER CLSP COOLING SETPOINT SELECT
ENTER
ENTER
ENTER
0
3
0
0
3
Scrolling Stops
Flashing ‘0’
Select ‘3’
Change Accepted
SUB-MODE
RSET
KEYPAD
ENTRY
Table 14 — 4 to 20 mA Reset
ITEM DISPLAY
ENTER CRST 1
MA.DG
5.0
F
(2.8
C)
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.
ITEM
EXPANSION
COOLING RESET
TYPE
DEGREES COOL
RESET
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)
22
MODE
(RED LED)
Table 15 — Configuring Outdoor Air and Space Temperature Reset
KEYPAD
ENTRY
SUB-
MODE
KEYPAD
ENTRY
ITEM
DISPLAY
Outdoor
Air
Space
ITEM
EXPANSION
ENTER
DISP
UNIT
OPT1
OPT2
COMMENT
CCN
CONFIGURATION
RSET
ENTER
CRST 2
RM.NO*
RM.F
RM.DG
85 °F
55 °F
15
F
4
72 °F
68 °F
6
F
COOLING RESET
TYPE
REMOTE - NO
RESET TEMP
REMOTE - FULL
RESET TEMP
REMOTE - DEGREES
RESET
2 = Outdoor-Air Temperature
(Connect to LVT-4,5)
4 = Space Temperature
(Connect to LVT-3,4)
Default: 125.0 F (51.7 C)
Range: 0° to125 F
(–17.8 to 51.7 C)
Default: 0.0° F (-17.7 C)
Range: 0° to 125 F
(–17.8 to 51.7 C)
Default: 0° F (0° C)
Range: –30 to 30 F
(–16.7 to -16.7 C)
*1 item skipped in this example.
MODE
(RED LED)
Table 16 — Configuring Return Temperature Reset
KEYPAD
ENTRY
SUB-MODE
KEYPAD
ENTRY
ENTER
DISP
ENTER
ENTER
ITEM DISPLAY
TEST ON/OFF
TYPE X UNIT
OPT1
ENTER
OPT2
ENTER
FLUD
CTRL
X
X
ITEM
EXPANSION
TEST DISPLAY LEDs
UNIT TYPE
COOLER FLUID
CONTROL METHOD
COMMENT
CCN
CONFIGURATION
RSET
ENTER
*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.
CRST 3
RT.NO* 10.0
F
RT.F
RT.DG
2.0
5.0
F
F
COOLING RESET TYPE
RETURN FLUID - NO
RESET TEMP
RETURN FLUID - FULL
RESET TEMP
RETURN - DEGREES
RESET
0 = No Reset
1 = 4 to 20 mA Input (EMM required)
(Connect to EMM TB6-2,3)
2 = Outdoor-Air Temperature
3 = Return Fluid
4 = Space Temperature
(Connect to TB5-5,6)
Default: 10.0
F (5.6 C)
Range: 0° to 30 F COOLER DT
(0.0 to 16.7 C)
Default: 0
F (–17.8 C)
Range: 0° to 30 F COOLER DT
(0.0 to 16.7 C)
Default: 0
F (0 C)
Range: –30 to 30°F (–16.7 to 16.7 C)
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.
LEGEND
LWT — Leaving Water (Fluid) Temperature
Fig. 15 — Outdoor-Air Temperature Reset
LEGEND
LWT — Leaving Water (Fluid) Temperature
Fig. 16 — Space Temperature Reset
EWT —
LWT —
LEGEND
Entering Water (Fluid) Temperature
Leaving Water (Fluid) 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 configure the 2 Demand Limit Switch points (Configura- tion 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 (Configura- tion 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.
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
Then configure the Loadshed Group Number (Configura- tion ration
(Configuration
RSET DMDC) to 3.
RSET SHNM), Loadshed Demand Delta (Configu-
RSET SHDL), and Maximum Loadshed Time
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.
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.
100
80
60
40
100% CAPACITY AT 4 mA
20
0
0 2
75% CAPACITY AT 12 mA
4 6 8 10 12 14
DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT
Fig. 18 — 4 to 20-mA Demand Limiting
50% CAPACITY AT 20 mA
16 18 20
70
(21)
60
(15)
50
(10)
40
(4.4)
100
(38)
90
(32)
80
(27)
30
(-1)
20
(-7)
10
(-12)
0
(-17)
0
(FLUD = 2) MINIMUM
SET POINT 14 F (-10 C)
2
EMM — Energy Management Module
4 6
(FLUD = 1) MINIMUM
SET POINT 38 F (3.3 C)
8 10 12
4 TO 20 mA SIGNAL TO EMM
14
Fig. 19 — Cooling Set Point (4 to 20 mA)
16
MAXIMUM
SET POINT
70 F (21.1 C)
18 20
25
MODE
CONFIGURATION
Table 17 — Configuring Demand Limit
KEYPAD
ENTRY
ENTER
SUB-MODE
DISP
KEYPAD
ENTRY
ENTER
ITEM
TEST
DISPLAY
ON/OFF
ITEM EXPANSION
Test Display LEDs
UNIT
OPT1
OPT2
CCN
RSET
ENTER
ENTER
ENTER
ENTER
ENTER
TYPE
FLUD
CTRL
CCNA
CRST
X
X
X
X
X
Unit Type
Cooler Fluid
Control Method
CCN Address
Cooling Reset Type
COMMENT
DMDC* X
*Seven items skipped in this example.
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
There is also a maximum unload time configuration, (Config- uration UNIT
UNIT A1.TY) is configured to YES.
MAX.T) that is set to 10 seconds (sizes
DM20
SHNM
SHDL
SHTM
DLS1
DLS2
26
XXX %
XXX
XXX%
XXX MIN
XXX %
XXX %
Demand Limit Select
Demand Limit at 20 mA
Loadshed Group
Number
Loadshed Demand
Delta
Maximum Loadshed
Time
Demand Limit
Switch 1
Demand Limit
Switch 2
Default: 0
0 = None
1 = Switch
2 = 4 to 20 mA Input
3 = CCN Loadshed
Default: 100%
Range: 0 to 100
Default: 0
Range: 0 to 99
Default: 0%
Range: 0 to 60%
Default: 60 min.
Range: 0 to 120 min.
Default: 80%
Range: 0 to 100%
Default: 50%
Range: 0 to 100%
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.
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
100% capacity; digital operation can be disabled by configuring A1.TY = NO (Configuration Unit A1.TY).
5. 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.
6. Crankcase heaters must be firmly attached to compressors, and must be on for 24 hours prior to start-up
(30MPA units only).
7. Electrical power source must agree with unit nameplate.
8. Check rotation of scroll compressors. Monitor control alarms during first compressor start-up for reverse rotation protection alarm.
START-UP AND OPERATION
CAUTION
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).
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.
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.
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 adjustment is necessary.
CSP.1). No cooling range
3. Start chilled fluid pump (if not configured for cooler pump control).
4. Turn ENABLE/OFF/REMOTE CONTACT switch to
ENABLE position.
UNIT SIZE
30MP015
30MP020
30MP030
30MP040
30MP045 a30-4978
OIL SIGHTGLASS
Fig. 20 — Sight Glass Location
Table 18 — Minimum Flow Rates and Minimum Loop Volume — English
FLOW RATE
EVAPORATOR CONDENSER
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
10
10
6
6
N/A
10
10
6
6
6
6
6
6
6
UNIT SIZE
30MP015
30MP020
30MP030
30MP040
30MP045
Table 19 — Minimum Flow Rates and Minimum Loop Volume — SI
FLOW RATE
EVAPORATOR CONDENSER
L/s
1.4
1.8
2.7
3.5
4.0
L/s
1.4
1.8
2.7
3.5
4.0
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
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
10.8
10.8
6.5
6.5
N/A
10.8
10.8
6.5
6.5
6.5
6.5
6.5
6.5
6.5
LEGEND
HGBP — Hot Gas Bypass
27
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).
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).
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
Table 20 — Temperature Limits for
Standard 30MP Units
TEMPERATURE LIMIT
Maximum Condenser LWT
Minimum Condenser EWT
Maximum Cooler EWT*
Maximum Cooler LWT
Minimum Cooler LWT†
F
140
65
95
70
40
C
60
18
35
21
4
EWT —
LWT —
LEGEND
Entering Fluid (Water) Temperature
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.
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:
% Voltage Imbalance = 100 x max voltage deviation from avg voltage 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
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
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.
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 1 1 / after the call for cooling.
2
to 3 minutes
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.
SERVICE
WARNING
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
the installation of the new compressor, tighten all hardware to the following specifications. (See Table 21.)
Table 21 — Unit Torque Specification
FASTENER
Compressor Mounting
Bolts
Compressor Power
Connections
Compressor Ground
Terminal Connections
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
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 030-
045, 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.
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.
Oil Charge
CAUTION
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.
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
3 /
8
1 /
8
to
of sight glass. All compressors must be off when checking 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.
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.
30
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.
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.
Table 22 — Additional Lubrication Recommendation — English
30MPA UNIT
SIZE
CONDENSER
09DP
ADDITIONAL LUBRICANT (FLUID OUNCES) REQUIRED BASED ON ACTUAL REFRIGERANT LINE LENGTH
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
20
S018
S020
0
11
9
12
11
13
12
14
13
21
14
23
15
26
16
28
30
40
45
S030
M040
M050
13
27
27
15
30
30
17
33
33
20
36
37
22
51
52
24
57
57
27
63
63
29
68
69
NOTE: This chart is based on recommended pipe sizes.
Table 23 — Additional Lubrication Recommendation — SI
30MPA UNIT
SIZE
CONDENSER
09DP
ADDITIONAL LUBRICANT (FLUID OUNCES) REQUIRED BASED ON ACTUAL REFRIGERANT LINE LENGTH
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
20
S018
S020
0
315
262
347
319
380
352
413
384
620
417
688
450
756
482
823
30
40
45
S030
M040
M050
372
784
791
440
881
888
508
977
984
575
1074
1081
643
1511
1518
710
1676
1683
778
1841
1848
846
2005
2012
NOTE: This chart is based on recommended pipe sizes.
HPS
DPT
LEGEND
CWFS — Chilled Water Flow Switch
DPT — Discharge Pressure Transducer
EWT
HPS
— Entering Water Thermistor
— High Pressure Switch
LWT
RGT
SPT
— Leaving Water Thermistor
— Return Gas Thermistor (Optional)
— Suction Pressure Transducer a30-5049
Fig. 21 — Compressor Location — 30MP015-045 Units (30MPW045 Unit Shown)
RGT
SPT
EWT
(HIDDEN)
CWFS
LWT
31
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.
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
Psig
500
CUT-IN 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.
32
COOLER FREEZE-UP PROTECTION
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.
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
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 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.
5/8 in. HEX
4. Wrong pump motor rotation. Pump must rotate clockwise when viewed from motor end of pump.
BASE
BOARD
J8
3
4
1
2
1
2
5
6
3
4
1
2
3
1
2
3
4
7
8
9
10
11
12
4
5
6
19
20
21
22
23
24
25
26
9
10
11
12
13
14
15
16
17
18
1
2
3
4
7
8
5
6
BLU
VIO
RED
RED
GRN
BLK
RED
GRN
BLK
RED
BLK
RED
BLK
B
C
A
B
C
A
+
-
+
-
CONDENSER EWT
ACCESSORY
CONDENSER LWT
ACCESSORY
J12
LVT
T55
3 23
4 22
5 21
RGTA
ACCESSORY
COOLER ENTERING
FLUID TEMP
COOLER LEAVING
FLUID TEMP
DPTA
SPTA
SEN
T-55
ACCSY
OAT ACCESSORY OR
DUAL CHILLER LWT a30-5043
LEGEND
ACCSY — Accessory
DPT — Discharge Pressure Transducer
EWT
LWT
— Entering Water Temperature
— Leaving Water Temperature Sensor
LVT
OAT
RGT
SEN
SPT
— 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
1/4-18 NPT
6" MINIMUM
CLEARANCE FOR
THERMISTOR
REMOVAL
Fig. 22 — Thermistor Well
33
TEMP
(F)
35
36
37
38
31
32
33
34
27
28
29
30
23
24
25
26
19
20
21
22
15
16
17
18
11
12
13
14
9
10
7
8
51
52
53
54
47
48
49
50
55
56
57
58
43
44
45
46
39
40
41
42
5
6
3
4
–1
0
1
2
–5
–4
–3
–2
–9
–8
–7
–6
–17
–16
–15
–14
–13
–12
–11
–10
–25
–24
–23
–22
–21
–20
–19
–18
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
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
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
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
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
115
116
117
118
119
120
121
122
107
108
109
110
111
112
113
114
99
100
101
102
103
104
105
106
95
96
97
98
91
92
93
94
131
132
133
134
135
136
137
138
123
124
125
126
127
128
129
130
139
140
141
142
87
88
89
90
83
84
85
86
79
80
81
82
75
76
77
78
71
72
73
74
67
68
69
70
63
64
65
66
59
60
61
62
VOLTAGE
DROP
(V)
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
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
2.506
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
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
3.699
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
Table 25 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)
RESISTANCE
(Ohms)
TEMP
(F)
VOLTAGE
DROP
(V)
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
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
0.723
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
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
1.982
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
RESISTANCE
(Ohms)
TEMP
(F)
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
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
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
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
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
199
200
201
202
203
204
205
206
191
192
193
194
195
196
197
198
183
184
185
186
187
188
189
190
175
176
177
178
179
180
181
182
215
216
217
218
219
220
221
222
207
208
209
210
211
212
213
214
223
224
225
167
168
169
170
171
172
173
174
159
160
161
162
163
164
165
166
151
152
153
154
155
156
157
158
143
144
145
146
147
148
149
150
VOLTAGE
DROP
(V)
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
0.296
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
0.176
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
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
0.511
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
RESISTANCE
(Ohms)
429
424
419
415
410
405
401
396
473
467
461
456
450
445
439
434
533
524
516
508
501
494
487
480
614
602
591
581
570
561
551
542
350
344
338
332
325
318
311
304
391
386
382
377
372
367
361
356
297
289
282
719
705
690
677
663
650
638
626
850
832
815
798
782
765
750
734
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
34
TEMP
(C)
–4
–3
–2
–1
–8
–7
–6
–5
–16
–15
–14
–13
–12
–11
–10
–9
–24
–23
–22
–21
–20
–19
–18
–17
–32
–31
–30
–29
–28
–27
–26
–25
10
11
8
9
12
13
14
6
7
4
5
2
3
0
1
VOLTAGE
DROP
(V)
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
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
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
Table 26 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)
RESISTANCE
(Ohms)
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
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
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
TEMP
(C)
43
44
45
46
39
40
41
42
35
36
37
38
31
32
33
34
27
28
29
30
23
24
25
26
19
20
21
22
15
16
17
18
55
56
57
58
59
60
61
51
52
53
54
47
48
49
50
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
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
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
VOLTAGE
DROP
(V)
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
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
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
RESISTANCE
(Ohms)
TEMP
(C)
90
91
92
93
86
87
88
89
82
83
84
85
78
79
80
81
74
75
76
77
70
71
72
73
66
67
68
69
62
63
64
65
102
103
104
105
106
107
94
95
96
97
98
99
100
101
VOLTAGE
DROP
(V)
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
0.506
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
0.193
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)
502
489
477
466
456
446
436
427
645
623
602
583
564
547
531
516
1,158
1,118
1,079
1,041
1,006
971
938
906
876
836
805
775
747
719
693
669
346
335
324
312
299
285
419
410
402
393
385
376
367
357
35
TEMP
(F)
32
33
34
35
28
29
30
31
24
25
26
27
20
21
22
23
16
17
18
19
12
13
14
15
10
11
8
9
6
7
4
5
2
3
0
1
–4
–3
–2
–1
–12
–11
–10
–9
–8
–7
–6
–5
–25
–24
–23
–22
–21
–20
–19
–18
–17
–16
–15
–14
–13
48
49
50
51
44
45
46
47
40
41
42
43
36
37
38
39
56
57
58
59
52
53
54
55
60
VOLTAGE
DROP
(V)
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
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
4.633
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
4.758
4.750
4.741
4.733
4.724
4.715
4.705
4.696
4.686
4.676
4.665
4.655
4.644
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
VOLTAGE
DROP
(V)
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
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
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
2.994
2.963
2.932
2.901
2.870
2.839
2.808
2.777
2.746
2.715
2.684
2.653
2.622
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
RESISTANCE
(Ohms)
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
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
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
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
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
TEMP
(F)
114
115
116
117
118
119
120
121
106
107
108
109
110
111
112
113
98
99
100
101
102
103
104
105
94
95
96
97
90
91
92
93
86
87
88
89
82
83
84
85
78
79
80
81
74
75
76
77
70
71
72
73
66
67
68
69
61
62
63
64
65
130
131
132
133
134
135
136
137
122
123
124
125
126
127
128
129
138
139
140
141
142
143
144
145
146
Table 27 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop
(For SPT)
VOLTAGE
DROP
(V)
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
0.558
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
0.338
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
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
0.890
0.876
0.862
0.848
0.835
0.821
0.808
0.795
0.782
0.770
0.758
0.745
0.733
TEMP
(F)
200
201
202
203
204
205
206
207
192
193
194
195
196
197
198
199
184
185
186
187
188
189
190
191
176
177
178
179
180
181
182
183
216
217
218
219
220
221
222
223
224
225
208
209
210
211
212
213
214
215
168
169
170
171
172
173
174
175
160
161
162
163
164
165
166
167
147
148
149
150
151
152
153
154
155
156
157
158
159
RESISTANCE
(Ohms)
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
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
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
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
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
RESISTANCE
(Ohms)
827
814
800
787
774
762
749
737
947
931
915
900
885
870
855
841
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
639
629
620
610
601
592
583
574
566
557
725
714
702
691
680
670
659
649
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
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
36
TEMP
(C)
50
55
60
70
20
25
30
35
40
45
-10
-5
0
5
10
15
-40
-35
-30
-25
-20
-15
TEMP
(C)
–10
–9
–8
–7
–6
–5
–4
–3
–18
–17
–16
–15
–14
–13
–12
–11
–26
–25
–24
–23
–22
–21
–20
–19
–32
–31
–30
–29
–28
–27
10
11
12
13
8
9
6
7
14
4
5
2
3
–2
–1
0
1
Table 28 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop
(For SPT)
RESISTANCE
(Ohms)
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
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
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
VOLTAGE
DROP
(V)
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
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
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
TEMP
(C)
37
38
39
40
41
42
43
44
29
30
31
32
33
34
35
36
21
22
23
24
25
26
27
28
15
16
17
18
19
20
53
54
55
56
57
58
59
60
61
45
46
47
48
49
50
51
52
RESISTANCE
(Ohms)
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
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
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
VOLTAGE
DROP
(V)
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
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
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
VOLTAGE
DROP
(V)
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
0.940
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
0.396
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
TEMP
(C)
88
89
90
91
84
85
86
87
80
81
82
83
76
77
78
79
72
73
74
75
68
69
70
71
62
63
64
65
66
67
100
101
102
103
104
105
106
107
96
97
98
99
92
93
94
95
RESISTANCE
(Ohms)
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
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
680
661
643
626
609
592
576
561
861
836
811
787
764
742
721
700
TEMP
(F)
68
77
86
95
104
113
122
131
140
158
14
23
32
41
50
59
-40
-31
-22
-13
-4
5
Table 29 — 86K Thermistor vs Resistance (DTT)
RESISTANCE
(Ohms)
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
TEMP
(C)
135
140
145
150
155
160
165
170
175
180
105
110
115
120
125
130
75
80
85
90
95
100
TEMP
(F)
275
284
293
302
311
320
329
338
347
356
221
230
239
248
257
266
167
176
185
194
203
212
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
37
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.
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.
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.
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 —
T he 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.
38
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.
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 Com-
fortLink 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-
39 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.
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.
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
ENTER and until the sub-menu item RCRN “RESET
ALL CURRENT ALARMS” is displayed. Press ENTER
The control will prompt the user for a password, by displaying
.
PASS and WORD. Press word, 1111. Press ENTER
ENTER to display the default pass-
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
The alarms will be reset.
ENTER .
70
60
50
40
30
20
10
0
120
110
100
90
80
0 10 20 30 40 50 60 70
Compressor Unloaded Run Time (Minutes)
80 90
*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
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
Compressor Loses Oil
Hot Liquid Line
Frosted Liquid Line
Frosted Suction Line
Freeze-Up
Table 31 — Troubleshooting
Low refrigerant charge
Low suction temperature
Thermistor failure
System load was reduced faster than controller could remove stages
CAUSE
Loss of charge control. Acting erratically.
Repair leak and recharge.
REMEDY
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.
Temperature controller deadband setting is too low
High-pressure control acting erratically
Noncondensables in system
Condenser scaled/dirty
Raise deadband setting.
Replace control.
Purge system.
Clean condenser.
Fans in remote condensing unit (30MPA only) not operating Repair or replace if defective.
System overcharged with refrigerant Reduce charge.
Low refrigerant charge
Control contacts fused
Add refrigerant.
Replace control.
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
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)
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.
Stuck TXV
Improper charging
System not drained for winter shutdown
Loose thermistor
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.
41
Table 32 — Alarm and Alert Codes
ALARM/
ALERT
CODE
ALARM
OR
ALERT
A048
T051
A051
T052
A052
T053
A053
A060
A061
T062
T063
T068
T073
T074
A077
T079
A090
A092
T094
A110
A112
A114
Alarm
Alert
Alarm
Alert
Alarm
Alert
Alarm
Alarm
Alert
Alarm
Alarm
Alarm
Failure
Failure
Failure
Failure
Failure
DESCRIPTION
Circuit A Compressor
Availability Alarm
Circuit A, Compressor 1
Circuit A, Compressor 1
Circuit A, Compressor 2
Circuit A, Compressor 2
Circuit A, Compressor 3
Circuit A Discharge
Pressure Transducer Failure
Circuit A Suction
Pressure Transducer Failure
Discharge Gas
Thermistor Failure
Circuit A Loss of Charge
Circuit A High Saturated
Suction Temperature
Circuit A Low Suction
Superheat
WHY WAS THIS
ALARM
GENERATED?
Two compressors on circuit failed
Compressor feedback signal does not match relay state
Respective current sensor board (CSB) feedback signal is ON when the compressor should be off
Compressor feedback signal does not match relay state
Respective current sensor board (CSB) feedback signal is ON when the compressor should be off
Compressor feedback signal does not match relay state
ACTION TAKEN down.
Compressor A2 shut down.
Compressor A3 shut down.
BY CONTROL
Circuit shut down
Compressor A1 shut
Unit shut down
Unit shut down
Alarm
Alarm
Alarm
Alert
Alert
None
Alert
Alert
Alarm
Alert
Circuit A, Compressor 3
Failure
Cooler Leaving Fluid
Thermistor Failure
Cooler Entering Fluid
Thermistor Failure
Condenser Leaving Fluid
Thermistor Failure
Condenser Entering Fluid
Thermistor Failure
Circuit A Return Gas
Thermistor Failure
Outside Air Thermistor
Failure
Space Temperature/Dual Chiller
Thermistor Failure
Respective current sensor board (CSB) feedback signal is ON when the compressor should be off
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
If return gas sensors are enabled (RG.EN) and thermistor is outside range of
–40 to 245 F (–40 to 118 C)
Unit shut down
Chiller shut down immediately
Chiller shut down
immediately
Alert only.
No action taken.
Alert only.
No action taken.
Circuit A shut down
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
(if enabled)
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
(if enabled)
Temperature reset disabled. Chiller runs under normal control/set points.
Temperature reset disabled. Chiller runs under normal control/set points.
Circuit A Saturated
Suction Temperature exceeds Cooler Leaving
Fluid Temperature
Faulty expansion valve, suction pressure transducer or leaving fluid thermistor.
Circuit A shutdown.
Lead/Lag LWT
Thermistor Failure
Thermistor outside range of
–40 to 245 F (–40 to 118 C)
Chiller runs as a stand alone machine
RESET
METHOD
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
PROBABLE
CAUSE
Only one compressor operating.
High-pressure switch open, faulty CSB, loss of condenser flow, filter drier plugged, noncondensables, operation beyond capability.
High-pressure switch open, faulty CSB, loss of condenser flow, filter drier plugged, noncondensables, operation beyond capability.
High-pressure switch open, faulty CSB, loss of condenser flow, filter drier plugged, noncondensables, operation beyond capability.
High-pressure switch open, faulty CSB, loss of condenser flow, filter drier plugged, noncondensables, operation beyond capability.
High-pressure switch open, faulty CSB, loss of condenser flow, filter drier plugged, noncondensables, operation beyond capability.
High-pressure switch open, faulty CSB, loss of condenser flow, filter drier plugged, noncondensables, operation beyond capability.
Thermistor failure, damaged cable/wire or wiring error.
Thermistor failure, damaged cable/wire or wiring error.
Thermistor failure, damaged cable/wire or wiring error.
Thermistor failure, damaged cable/wire or wiring error.
Thermistor failure, damaged cable/wire or wiring error.
Thermistor failure, damaged cable/wire or wiring error.
Thermistor failure, damaged cable/wire or wiring error.
Outside of range (0 - 667 psig) Circuit A shut down
Outside of range (0 - 420 psig) Circuit A shut down
Manual
Automatic
Automatic
Automatic
Faulty expansion valve or suction pressure transducer or leaving fluid thermistor.
Dual LWT thermistor failure, damaged cable/wire or wiring error.
Transducer failure, poor connection to MBB, or wiring damage/error.
Transducer failure, poor connection to MBB, or wiring damage/error.
Discharge thermistor (DTT) is either open or shorted outside of range –39.9 to 356 F (–39.9 to 180 C)
If the compressors are off and discharge pressure reading is < 26 psig for
30 sec.
Circuit saturated suction temperature pressure transducer > 70 F (21.1 C) for 5 minutes
Digital compressor shut down.
Circuit not allowed to start.
Circuit shut down
Suction superheat is less than 5° F (2.8 C) for 5 minutes. (if RGT installed)
Circuit A shut down.
Automatic
Manual
Thermistor failure, damaged cable/wire or wiring error.
Refrigerant leak or transducer failure
Manual
Automatic restart after first daily occurrence.
Manual restart thereafter.
Faulty Expansion valve, faulty suction pressure transducer or high entering fluid temperature.
Faulty expansion valve, faulty suction pressure transducer, faulty suction gas thermistor, circuit overcharged
42
ALARM/
ALERT
CODE
A116
A122
A126
T133
A140
A150
A151
A152
T153
A154
T155
A156
A157
T173
T174
T175
T176
T177
ALARM
OR
ALERT
Alarm
Alarm
Alarm
Alert
Alert
Alarm
Alarm
Alarm
Alert
Alarm
Alert
Alarm
Alarm
Alert
Alert
Alert
Alert
Alert
DESCRIPTION
Circuit A Low Cooler
Suction Temperature
High Pressure Switch
Trip Circuit A
Circuit A High
Head Pressure
Circuit A Low Suction
Pressure
Reverse Rotation
Detected
Emergency Stop
Illegal Configuration
Unit Down Due to
Failure
Real Time Clock
Hardware Failure
Serial EEPROM
Hardware Failure
Serial EEPROM
Storage Failure
Critical Serial EEPROM
Storage Failure
A/D Hardware Failure
Loss of Communication with EMM
4 to 20 mA Cooling Set
Point Input Failure
Loss of Communication with AUX Board
4 to 20 mA
Temperature Reset
Input Failure
4 to 20 mA Demand
Limit Input Failure
Table 32 — Alarm and Alert Codes (cont)
WHY WAS THIS
ALARM
GENERATED?
Mode 7 caused the compressor to unload 3 consecutive times with less than a
30-minute interval between each circuit shutdown.
High Pressure A Switch
Input open to MBB
SCT >Maximum condensing temperature from operating envelope
Operation outside compressor operating envelope
Suction pressure below
34 psig for 8 seconds or below 23 psig
Incoming chiller power leads not phased correctly
CCN emergency stop command received
One or more illegal configurations exists.
Both circuits are down due to alarms/alerts.
Internal clock on MBB fails
Hardware failure with MBB
Configuration/storage failure with MBB
Configuration/storage failure with MBB
Hardware failure with peripheral device
MBB loses communication with EMM
If configured with EMM and input less than 2 mA or greater than 22 mA
ACTION TAKEN start.
start.
BY CONTROL
Circuit shut down
Circuit shut down
Circuit shut down
Circuit shut down
Chiller not allowed to
Chiller shutdown.
Chiller is not allowed to
Chiller is unable to run.
Occupancy schedule will not be used. Chiller defaults to Local On mode.
Chiller is unable to run.
No Action
Chiller is not allowed to run.
Chiller is not allowed to run.
4 to 20 mA temperature reset disabled. Demand
Limit set to 100%. 4 to
20 mA set point disabled.
Set point function disabled. Chiller controls to CSP1.
RESET
METHOD
PROBABLE
CAUSE
Manual
Manual
Automatic, only after first 3 daily occurrences.
Manual reset thereafter. SCT must drop 5 F
(2.8 C) before restart
Automatic restart after first daily occurrence.
Manual restart thereafter.
Manual
Faulty expansion valve, low refrigerant charge, plugged filter drier, faulty suction pressure transducer, low cooler fluid flow
Faulty transducer/high pressure switch.
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.
Reverse any two incoming power leads to correct. Check for correct fan rotation first.
Automatic once
CCN command for
EMSTOP returns to normal
Manual once configuration errors are corrected
Automatic once alarms/alerts are cleared that prevent the chiller from starting.
CCN Network command.
Configuration error.
Check unit settings.
Alarm notifies user that chiller is 100% down.
Automatic when correct clock control restarts.
Manual
Manual
Manual
Manual
Time/Date/Month/
Day/Year not properly set.
Main Base Board failure.
Potential failure of
MBB. Download current operating software. Replace
MBB if error occurs again.
Main Base Board failure.
Main Base Board failure.
Automatic
Automatic
Wiring error, faulty wiring or failed
Energy Management Module
(EMM).
MBB losses communication with AUX board
If configured with EMM and input less than 2 mA or greater than 22 mA
If configured with EMM and input less than 2 mA or greater than 22 mA
Digital control is disabled.
Reset function disabled. Chiller returns to normal set point control.
Demand limit function disabled. Chiller returns to 100% demand limit control.
Automatic
Automatic
Automatic
Faulty signal generator, wiring error, or faulty EMM.
Wiring error, faulty wiring, failed AUX board, ditital option enabled, Configuration →Unit→AI.TY=YES
Faulty signal generator, wiring error, or faulty EMM.
Faulty signal generator, wiring error, or faulty EMM.
See legend on page 46.
43
ALARM/
ALERT
CODE
T200
T201
A202
T203
T204
T205
T206
A207
A208
A220
A221
A222
ALARM
OR
ALERT
Alert
Alert
Alarm
Alert
Alert
Alert
Alert
Alarm
Alarm
Alarm
Alarm
Alarm
DESCRIPTION
Table 32 — Alarm and Alert Codes (cont)
Cooler Flow/Interlock
Contacts failed to Close at start-up
WHY WAS THIS
ALARM
GENERATED?
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
ACTION TAKEN
BY CONTROL
Chiller not allowed to start. For models with dual pumps, the second pump will be started if available
Cooler Flow/Interlock
Contacts Opened
During Normal
Operation
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
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
Loss of Communication with slave chiller
Loss of Communication with master chiller
Master and slave chiller with same address
High Leaving Chilled
Water Temperature
Cooler Freeze
Protection
EWT or LWT
Thermistor failure
Condenser Pump
Interlock Failure to
Close at Start-Up
Condenser Pump
Interlock Opened During
Normal Operation
Condenser Pump
Interlock Closed When
Pump is Off
Master chiller MBB loses communication with slave chiller MBB
Slave chiller MBB loses communication with master chiller MBB
Master and slave chiller have the same CCN address (CCN.A)
Dual chiller control disabled. Chiller runs as a stand-alone machine.
Dual chiller control disabled. Chiller runs as a stand-alone machine
Dual chiller routine disabled. Master/slave run as stand-alone chillers.
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.
Cooler EWT or LWT is less than Brine Freeze (BR.FZ)
Cooler EWT is less than
LWT by 3° F (1.7° C) for
1 minute after a circuit is started
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.
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.)
If configured for condenser pump interlock condenser pump control, and the flow switch is closed when pump relay is off.
Chiller shutdown without going through pumpdown. Cooler pump continues to run a minimum of
5 minutes (if control enabled).
Chiller shutdown.
Cooler pump shut off
(if control enabled).
Condenser and cooler pumps shut off.
Chiller shutdown
Condenser and cooler pumps shut off. Chiller shutdown
Chiller is not allowed to start.
RESET
METHOD
Manual
Manual
PROBABLE
CAUSE
Faulty flow switch or interlock.
Cooler pump failure, faulty flow switch or interlock.
Automatic when aux contacts open
Automatic
Automatic
Automatic
Automatic
Wiring error, faulty pump contactor
(welded contacts)
Wiring error, faulty wiring, failed Slave chiller MBB module, power loss at slave chiller, wrong slave address.
Wiring error, faulty wiring, failed master chiller MBB module, power loss at Master chiller.
CCN Address for both chillers is the same. Must be different. Check
CCN.A under the
OPT2 sub-mode in
Configuration at both chillers.
Building load greater than unit capacity, low water/brine flow or compressor fault.
Check for other alarms/alerts.
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.
Faulty thermistor
(T1/T2), low water flow.
Manual
Manual
Reverse flow faulty thermistor, miswired thermistor
Failure of condenser pump or controls.
Wiring error.
Manual
Manual
Failure of condenser pump or controls.
Wiring error.
Failure of condenser pump relays or interlocks, welded contacts.
44
ALARM/
ALERT
CODE
T302
T500
T501
T502
T950
T951
ALARM
OR
ALERT
Alert
Alert
Alert
Alert
Alert
Alert
DESCRIPTION
Strainer Blowdown
Scheduled
Maintenance Due
Current Sensor Board
A1 Failure
Current Sensor Board
A2 Failure
Current Sensor Board
A3 Failure
Loss of Communication with Water System
Manager
Table 32 — Alarm and Alert Codes (cont)
WHY WAS THIS
ALARM
GENERATED?
Strainer Service
Countdown (S.T.DN) expired. Complete strainer blowdown and enter 'YES' for Strainer Maintenance
Done (S.T.MN) item.
Alert occurs when CSB output is a constant high value
Alert occurs when CSB output is a constant high value
Alert occurs when CSB output is a constant high value
No communications have been received by the MBB within 5 minutes of last transmission
ACTION TAKEN
BY CONTROL
None
Compressor A1 shut down
Compressor A2 shut down
Compressor A3 shut down
WSM forces removed.
Chiller runs under own control
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
LEGEND
CCN
CSB
CSM
— Carrier Comfort Network
— Current Sensor Board
— Chiller System Manager
EEPROM — Electronic Eraseable Programmable Read Only Memory
EMM
EWT
— Energy Management Module
— Entering Fluid Temperature
LCW
LWT
MBB
SCT
TXV
WSM
— 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.
RESET
METHOD
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
PROBABLE
CAUSE
Routine strainer maintenance required
CSB failure.
CSB failure.
CSB failure.
Failed module, wiring error, failed transformer, loose connection plug, wrong address
Failed module, wiring error, failed transformer, loose connection plug, wrong address
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
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 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 ±
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
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 Configura- tion 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
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 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, (Configura- tion
→
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 (Configura- tion
→
RSET), the chiller has been configured to be the Master
Chiller MSSL=MAST Master/Slave Select (Configura- tion
→
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 (Config- uration
→
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 (Configura- tion
→
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 (Configura- tion
→
RSET), the chiller has been configured to be the Slave
Chiller MSSL=SLVE Master/Slave Select (Configura- tion
→
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 (Config- uration
→
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 (Configura- tion
→
RSET).
• Check for power at the master 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.
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 (Configura- tion
→
RSET), the chiller has been configured to be the Master
Chiller MSSL=MAST Master/Slave Select (Configura- tion
→
RSET) and both the master chiller and slave chiller have the same address, CCNA CCN Address (Configura- tion
→
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 (Configura- tion
→
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 (Configura- tion
→
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
• 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 Start-
Up Alarm) — This alarm will be generated if the unit is configured for D.FL.S=ENBL Enable Cond Flow Switch (Con- figuration
→
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 (Configura- tion
→
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
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.
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.
50
ITEM
TEST
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
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
RANGE
DATE
YEAR
RUN
HRS.U
STR.U
HR.P1
HR.P2
HOUR
HR.A1
HR.A2
HR.A3
STRT
ST.A1
ST.A2
ST.A3
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
PM
STRN
PREVENTIVE MAINTENANCE
STRAINER MAINTENANCE
STRN
SI.ST
Strainer Srvc Interval
STRN
S.T.DN
Strainer Srvc Countdown
STRN
S.T.MN
Strainer Maint. Done
ST.DT
STRAINER MAINT. DATES
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*
SOFTWARE VERSION NUMBERS
CESR131482-xx-xx
CESR131333-xx-xx
CESR131174-xx-xx
CESR131171-xx-xx
CESR130227-xx-xx
00:00-23:59
1 - 12
(1 = January,
2 = February, etc.)
01-31
0 to 999999
0 to 1000000
0 to 999999.9
0 to 999999.9
0 to 999999
0 to 999999
0 to 999999
0 to 999999
0 to 999999
0 to 999999
0 to 65535
0 to 65535
* If these devices are not installed, they will not show in the table.
UNITS xxx.x °F (°C) xxx.x °F (°C) xxx.x °F xxx.x °F xxx x
NO/YES
NO/YES xxx x xxx xx.xx
xx xx xx xxxx HRS xxxx xxxx HRS xxxx HRS xxxx HRS xxxx HRS xxxx HRS xxxx xxxx xxxx
CCN POINT
EWT
LWT
SP
CTRL_PNT
SMZ
STAT
OCC
MODE
CAP_T
DEM_LIM
STAGE
ALRMALRT
TIMECOPY
MOY
DOM
YOCDISP
HR_MACH
CY_MACH
HR_CPUMP
HR_DPUMP
HOURS_A1
HOURS_A2
HOURS_A3
CY_A1
CY_A2
CY_A3 xxxx HRS xxxx HRS
NO/YES
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
SI_STRNR
ST_CDOWN
ST_MAINT
COMMENT
Default: 8760
EXPANSION
SERVICE TEST MODE
Service Test Mode and Sub-Mode Directory
RANGE UNITS
OFF/ON
CCN POINT
MAN_CTRL
COMMENT
To enable Service Test mode, move Enable/Off/
Remote contact switch to
OFF. Change TEST to
ON. Move switch to
ENABLE.
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
0 to 15
0 to 15
OFF/ON
OFF/ON xx
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON xx
OFF/ON
OFF/ON
OFF/ON
S_CLPMP
S_CNDPMP
S_A1ULTM
S_CCH
S_CWVO
S_CWVC
S_LLSV
S_ALM
S_A1_RLY
S_A1ULTM
S_A2_RLY
S_A3_RLY
S_MLV not supported not supported
51
ITEM
UNIT
CEWT
CLWT
CDET
CDLT
OAT
SPT
DLWT
CIR.A
SCT.A
SST.A
RGT.A
D.GAS
SH.A
PRC.A
DP.A
SP.A
ITEM
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Temperature Mode and Sub-Mode Directory
UNITS CCN POINT 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 xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x
ΔF
COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
OAT
SPT
DUAL_LWT
TMP_SCTA
TMP_SSTA
TMP_RGTA
DISGAS
SH_A
Pressures Mode and Sub-Mode Directory
EXPANSION
PRESSURES CIRCUIT A
Discharge Pressure
Suction Pressure
UNITS xxx.x PSIG xxx.x PSIG
DP_A
SP_A
CCN POINT
Set Points Mode and Sub-Mode Directory
ITEM
COOL
CSP.1
CSP.2
CSP.2
HEAD
H.DP
FRZ
BR.FZ
EXPANSION
COOLING SETPOINTS
Cooling Setpoint 1
RANGE
Cooling Setpoint 2
ICE Setpoint
–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)
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)
UNITS xxx.x °F xxx.x °F xxx.x °F xxx.x °F xxx.x °F
CSP1
CSP2
CSP3
HSP
CCN POINT
BRN_FRZ
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
STRT/STOP
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
CCN POINT
START
COOLFLOW
CONDFLOW
DMD_SW1
DMD_SW2
ICE_DONE
DUAL_IN
K_A1_FBK
K_A2_FBK
K_A3_FBK
HPSA xx.x
xx.x
LMT_MA
DEM_LIM
RST_MA
DEG_RST
CSP_IN xx.x
Outputs Mode and Sub-Mode Directory
UNITS CCN POINT 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
* Not supported.
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
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
OFF/ON
COOLPUMP
CONDPUMP
ALM
COND_WVO
COND_WVC
K_A1_RLY
DIGITALP
K_A2_RLY
K_A3_RLY
CCH_RLY
LLSV_A
MLV_RLY
52
COMMENT
COMMENT
44°F
(6.6°C)
44°F
(6.6°C)
32°F
(0°C)
95°F
(35°C)
34°F
(1.1°C)
DEFAULT
COMMENT
COMMENT
D.FL.S
CDWS
OPT2
CTRL
LCWT
DELY
ICE.M
CCN
CCNA
CCNB
BAUD
ITEM
DISP
TEST
METR
LANG
PAS.E
PASS
UNIT
TYPE
SIZE
SZA.1
SZA.2
SZA.3
A1.TY
MAX.T
OPT1
FLUD
MLV.S
RG.EN
OAT.E
CSB.E
CPC
PM.DY
D.PM.E
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Configuration Mode and Sub-Mode Directory
EXPANSION
DISPLAY CONFIGURATION
Test Display LEDs
Metric Display
Language Selection
Password Enable
Service Password
UNIT CONFIGURATION
Unit Type
Unit Size
Compressor A1 Size
Compressor A2 Size
Compressor A3 Size
Compressor A1 Digital?
Maximum A1 Unload Time
RANGE
OFF/ON
OFF = English
ON = Metric
0 = English
1 = Espanol
2 = Francais
3 = Portuguese
DSBL/ENBL
0 to 9999
2=Air Cooled,
3=Water Cooled
15 to 45
Unit Size Dependent
Unit Size Dependent
Unit Size Dependent
NO/YES
0 to 15
X
XXXX
X
XXX
XX
XX
XX
XX
UNITS CCN POINT
DISPTEST
DISPUNIT
LANGUAGE
PASS_EBL
PASSCOPY
UNIT_TYP
SIZE
SIZE_A1
SIZE_A2
SIZE_A3
CPA1TYPE
MAXULTME
UNIT OPTIONS 1 HARDWARE
Cooler Fluid
Minimum Load Vlv 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
UNIT OPTIONS 2 CONTROLS
Control Method
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
High LCW Alert Limit
Minutes Off Time
Ice Mode Enable
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)
CCN NETWORK CONFIGS
CCN Address
CCN Bus Number
CCN Baud Rate
1 to 239
0 to 239
1 = 2400
2 = 4800
3 = 9600
4 =19,200
5 =38,400
X
XX MIN
X
X
XX
XX
XXX
XXX
X
FLUIDTYP
MLV_FLG
RGT_ENA
OAT_ENA
CSB_ENA
CPC
PUMP_DLY
CONDPMPE
CONDFLSW
CONDWTRS
CONTROL
LCW_LMT
DELAY
ICE_CNFG
CCNADD
CCNBUS
CCNBAUDD
DEFAULT
OFF = English
0
ENBL
1111
7 (040,045)
10 (015,020,030)
1 = Water
NO
ON
1 MIN
0=No Control
DSBL
DSBL
0=Switch
60°F (33.3°C)
0
DSBL
1
0
3 = 9600
53
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
MA.DG
RM.NO
RM.F
RM.DG
RT.NO
RT.F
RT.DG
DMDC
DM20
SHNM
SHDL
SHTM
DLS1
DLS2
LLEN
MSSL
SLVA
LLBL
LLBD
LLDY
PARA
SLCT
CLSP
ITEM
RSET
CRST
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Configuration Mode and Sub-Mode Directory (cont)
EXPANSION
RESET COOL TEMP
Cooling Reset Type
RANGE UNITS
4-20 - Degrees Reset
Remote - No Reset Temp
Remote - Full Reset Temp
Remote - Degrees Reset
Return - No Reset Temp
Return - Full Reset Temp
Return - Degrees Reset
Demand Limit Select
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
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
X
XX.XΔF
XXX.X °F
XXX.X °F
XX.X
ΔF
XXX.XΔF
XXX.XΔF
XX.X
ΔF
X
XXX%
XXX
XXX%
XXX
XXX%
XXX%
XXX
X
XXX
XXX
Lead/Lag Balance Delta
Lag Start Delay
Parallel Configuration
SETPOINT AND RAMP LOAD
Cooling Set Point Select
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
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
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
OFF/ON
OFF/ON
OFF/ON
OFF/ON
X
X.X
XX
X.X
CCN POINT
CRST_TYP
MA_DEG
REM_NO
REM_FULL
REM_DEG
RTN_NO
RTN_FULL
RTN_DEG
DMD_CTRL
DMT20MA
SHED_NUM
SHED_DEL
SHED_TIM
DLSWSP1
DLSWSP2
LL_ENA
MS_SEL
SLV_ADDR
LL_BAL
LL_BAL_D
LL_DELAY
PARALLEL
CLSP_TYP
RAMP_EBL
CRAMP
SCHEDNUM
Z_GAIN
ENABLEA1
ENABLEA2
ENABLEA3
REVR_ENA
CCNBC
OATBC
GSBC
CCNBCACK
DEFAULT
0 = No Reset
10.0
F( 5.5C)
10.0
F (–23.3C)
0.0
F (–17.8C)
0.0
F (0.0C)
10
F (5.5C)
0.0
F (0.0C)
0.0
F (0.0C)
0 = None
100
0
0
60
80
50
DSBL
MAST
0
0 = Master Leads
168
5 minutes
YES
0 = Single
ENBL
1.0
0
1.0
ENBL
OFF
OFF
OFF
OFF
54
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory
ITEM
TIME
HH.MM
DATE
MNTH
DOM
DAY
EXPANSION
TIME OF DAY
Hour and Minute
MONTH, DATE, DAY, AND YEAR
Month of Year
RANGE
0 to 65535
Day of Month
Day of Week
UNITS
XXXXX
CCN POINT
TIME
1 to 12 (1 = January,
2 = February, etc.)
1 to 31
1 - 7 (1 = Monday,
2 = Tuesday, etc.)
1999 to 2098
XX MOY
XX
X
XXXX
DOM
DOWDISP
YOCDISP
YEAR
DST
STR.M
STR.W
STR.D
MIN.A
STP.M
STP.W
STP.D
MIN.S
Year of Century
DAYLIGHT SAVINGS TIME
Month
Week
Day
Minutes to Add
Month
Week
Day
Minutes to Subtract
HOL.L
HD.01
LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 01
HD.01
MON Holiday Start Month
HD.01
DAY Start Day
HD.01
LEN Duration (days)
HD.02
HOLIDAY SCHEDULE 02
HD.02
MON Holiday Start Month
HD.02
DAY Start Day
HD.02
LEN Duration (days)
HD.03
HOLIDAY SCHEDULE 03
HD.03
MON Holiday Start Month
HD.03
DAY Start Day
HD.03
LEN Duration (days)
HD.04
HOLIDAY SCHEDULE 04
HD.04
MON Holiday Start Month
HD.04
DAY Start Day
HD.04
LEN Duration (days)
HD.05
HOLIDAY SCHEDULE 05
HD.05
MON Holiday Start Month
HD.05
DAY Start Day
HD.05
LEN Duration (days)
HD.06
HOLIDAY SCHEDULE 06
HD.06
MON Holiday Start Month
HD.06
DAY Start Day
HD.06
LEN Duration (days)
HD.07
HOLIDAY SCHEDULE 07
HD.07
MON Holiday Start Month
HD.07
DAY Start Day
HD.07
LEN Duration (days)
HD.08
HOLIDAY SCHEDULE 08
HD.08
MON Holiday Start Month
HD.08
DAY Start Day
HD.08
LEN Duration (days)
HD.09
HOLIDAY SCHEDULE 09
HD.09
MON Holiday Start Month
HD.09
DAY Start Day
HD.09
LEN Duration (days)
HD.10
HOLIDAY SCHEDULE 10
HD.10
MON Holiday Start Month
HD.10
DAY Start Day
HD.10
LEN Duration (days)
HD.11
HOLIDAY SCHEDULE 11
HD.11
MON Holiday Start Month
HD.11
DAY Start Day
HD.11
LEN Duration (days)
HD.12
HOLIDAY SCHEDULE 12
HD.12
MON Holiday Start Month
HD.12
DAY Start Day
HD.12
LEN Duration (days)
HD.13
HOLIDAY SCHEDULE 13
HD.13
MON Holiday Start Month
HD.13
DAY Start Day
HD.13
LEN Duration (days)
1 to 12
1 to 5
1 to 7
0 to 90
1 to 12
1 to 5
1 to 7
0 to 90
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
XX
X
X
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
STARTM
STARTW
STARTD
MINADD
STOPM
STOPW
STOPD
MINSUB
HOLMON01
HOLDAY01
HOLLEN01
HOLMON02
HOLDAY02
HOLLEN02
HOLMON03
HOLDAY03
HOLLEN03
HOLMON04
HOLDAY04
HOLLEN04
HOLMON05
HOLDAY05
HOLLEN05
HOLMON06
HOLDAY06
HOLLEN06
HOLMON07
HOLDAY07
HOLLEN07
HOLMON08
HOLDAY08
HOLLEN08
HOLMON09
HOLDAY09
HOLLEN09
HOLMON10
HOLDAY10
HOLLEN10
HOLMON11
HOLDAY11
HOLLEN11
HOLMON12
HOLDAY12
HOLLEN12
HOLMON13
HOLDAY13
HOLLEN13
10
5
7
60
4
1
7
60
DEFAULT
55
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory
ITEM EXPANSION
HOL.L
HD.14
LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 14
HD.14
MON Holiday Start Month
HD.14
DAY Start Day
HD.14
LEN Duration (days)
HD.15
HOLIDAY SCHEDULE 15
HD.15
MON Holiday Start Month
HD.15
DAY Start Day
HD.15
LEN Duration (days)
HD.16
HOLIDAY SCHEDULE 16
HD.16
MON Holiday Start Month
HD.16
DAY Start Day
HD.16
LEN Duration (days)
HD.17
HOLIDAY SCHEDULE 17
HD.17
MON Holiday Start Month
HD.17
DAY Start Day
HD.17
LEN Duration (days)
HD.18
HOLIDAY SCHEDULE 18
HD.18
MON Holiday Start Month
HD.18
DAY Start Day
HD.18
LEN Duration (days)
HD.19
HOLIDAY SCHEDULE 19
HD.19
MON Holiday Start Month
HD.19
DAY Start Day
HD.19
LEN Duration (days)
HD.20
HOLIDAY SCHEDULE 20
HD.20
MON Holiday Start Month
HD.20
DAY Start Day
HD.20
LEN Duration (days)
HD.21
HOLIDAY SCHEDULE 21
HD.21
MON Holiday Start Month
HD.21
DAY Start Day
HD.21
LEN Duration (days)
HD.22
HOLIDAY SCHEDULE 22
HD.22
MON Holiday Start Month
HD.22
DAY Start Day
HD.22
LEN Duration (days)
HD.23
HOLIDAY SCHEDULE 23
HD.23
MON Holiday Start Month
HD.23
DAY Start Day
HD.23
LEN Duration (days)
HD.24
HOLIDAY SCHEDULE 24
HD.24
MON Holiday Start Month
HD.24
DAY Start Day
HD.24
LEN Duration (days)
HD.25
HOLIDAY SCHEDULE 25
HD.25
MON Holiday Start Month
HD.25
DAY Start Day
HD.25
LEN Duration (days)
HD.26
HOLIDAY SCHEDULE 26
HD.26
MON Holiday Start Month
HD.26
DAY Start Day
HD.26
LEN Duration (days)
HD.27
HOLIDAY SCHEDULE 27
HD.27
MON Holiday Start Month
HD.27
DAY Start Day
HD.27
LEN Duration (days)
HD.28
HOLIDAY SCHEDULE 28
HD.28
MON Holiday Start Month
HD.28
DAY Start Day
HD.28
LEN Duration (days)
HD.29
HOLIDAY SCHEDULE 29
HD.29
MON Holiday Start Month
HD.29
DAY Start Day
HD.29
LEN Duration (days)
HD.30
HOLIDAY SCHEDULE 30
HD.30
MON Holiday Start Month
HD.30
DAY Start Day
HD.30
LEN Duration (days)
SCH.N
SCHEDULE NUMBER
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 12
0 to 31
0 to 99
0 to 99
RANGE UNITS CCN POINT
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
HOLMON22
HOLDAY22
HOLLEN22
HOLMON23
HOLDAY23
HOLLEN23
HOLMON24
HOLDAY24
HOLLEN24
HOLMON25
HOLDAY25
HOLLEN25
HOLMON26
HOLDAY26
HOLLEN26
HOLMON27
HOLDAY27
HOLLEN27
HOLMON28
HOLDAY28
HOLLEN28
HOLMON29
HOLDAY29
HOLLEN29
HOLMON30
HOLDAY30
HOLLEN30
SCHEDNUM
HOLMON14
HOLDAY14
HOLLEN14
HOLMON15
HOLDAY15
HOLLEN15
HOLMON16
HOLDAY16
HOLLEN16
HOLMON17
HOLDAY17
HOLLEN17
HOLMON18
HOLDAY18
HOLLEN18
HOLMON19
HOLDAY19
HOLLEN19
HOLMON20
HOLDAY20
HOLLEN20
HOLMON21
HOLDAY21
HOLLEN21
0
DEFAULT
56
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
ITEM EXPANSION
SCH.L
PER.1
LOCAL OCCUPANCY SCHEDULE
OCCUPANCY PERIOD 1
PER.1
OCC.1 Period Occupied Time
PER.1
UNC.1
Period Unoccupied Time
PER.1
MON.1 Monday In Period
PER.1
TUE.1
Tuesday In Period
PER.1
WED.1 Wednesday In Period
PER.1
THU.1
Thursday In Period
PER.1
FRI.1
Friday In Period
PER.1
SAT.1
Saturday In Period
PER.1
SUN.1
Sunday In Period
PER.1
HOL.1
Holiday In Period
PER.2
OCCUPANCY PERIOD 2
PER.2
OCC.2 Period Occupied Time
PER.2
UNC.2
Period Unoccupied Time
PER.2
MON.2 Monday In Period
PER.2
TUE.2
Tuesday In Period
PER.2
WED.2 Wednesday In Period
PER.2
THU.2
Thursday In Period
PER.2
FRI.2
Friday In Period
PER.2
SAT.2
Saturday In Period
PER.2
SUN.2
Sunday In Period
PER.2
HOL.2
Holiday In Period
PER.3
OCCUPANCY PERIOD 3
PER.3
OCC.3 Period Occupied Time
PER.3
UNC.3
Period Unoccupied Time
PER.3
MON.3 Monday In Period
PER.3
TUE.3
Tuesday In Period
PER.3
WED.3 Wednesday In Period
PER.3
THU.3
Thursday In Period
PER.3
FRI.3
Friday In Period
PER.3
SAT.3
Saturday In Period
PER.3
SUN.3
Sunday In Period
PER.3
HOL.3
Holiday In Period
PER.4
OCCUPANCY PERIOD 4
PER.4
OCC.4 Period Occupied Time
PER.4
UNC.4
Period Unoccupied Time
PER.4
MON.4 Monday In Period
PER.4
TUE.4
Tuesday In Period
PER.4
WED.4 Wednesday In Period
PER.4
THU.4
Thursday In Period
PER.4
FRI.4
Friday In Period
PER.4
SAT.4
Saturday In Period
PER.4
SUN.4
Sunday In Period
PER.4
HOL.4
Holiday In Period
PER.5
OCCUPANCY PERIOD 5
PER.5
OCC.5 Period Occupied Time
PER.5
UNC.5
Period Unoccupied Time
PER.5
MON.5 Monday In Period
PER.5
TUE.5
Tuesday In Period
PER.5
WED.5 Wednesday In Period
PER.5
THU.5
Thursday In Period
PER.5
FRI.5
Friday In Period
PER.5
SAT.5
Saturday In Period
PER.5
SUN.5
Sunday In Period
PER.5
HOL.5
Holiday In Period
PER.6
OCCUPANCY PERIOD 6
PER.6
OCC.6 Period Occupied Time
PER.6
UNC.6
Period Unoccupied Time
PER.6
MON.6 Monday In Period
PER.6
TUE.6
Tuesday In Period
PER.6
WED.6 Wednesday In Period
PER.6
THU.6
Thursday In Period
PER.6
FRI.6
Friday In Period
PER.6
SAT.6
Saturday In Period
PER.6
SUN.6
Sunday In Period
PER.6
HOL.6
Holiday In Period
PER.7
OCCUPANCY PERIOD 7
PER.7
OCC.7 Period Occupied Time
PER.7
UNC.7
Period Unoccupied Time
PER.7
MON.7 Monday In Period
PER.7
TUE.7
Tuesday In Period
PER.7
WED.7 Wednesday In Period
PER.7
THU.7
Thursday In Period
PER.7
FRI.7
Friday In Period
PER.7
SAT.7
Saturday In Period
PER.7
SUN.7
Sunday In Period
PER.7
HOL.7
Holiday In Period
RANGE
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
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
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
XX:XX
UNITS CCN POINT
PER1OCC
PER1UNC
PER1MON
PER1TUE
PER1WED
PER1THU
PER1FRI
PER1SAT
PER1SUN
PER1HOL
PER2OCC
PER2UNC
PER2MON
PER2TUE
PER2WED
PER2THU
PER2FRI
PER2SAT
PER2SUN
PER2HOL
PER3OCC
PER3UNC
PER3MON
PER3TUE
PER3WED
PER3THU
PER3FRI
PER3SAT
PER3SUN
PER3HOL
PER4OCC
PER4UNC
PER4MON
PER4TUE
PER4WED
PER4THU
PER4FRI
PER4SAT
PER4SUN
PER4HOL
PER5OCC
PER5UNC
PER5MON
PER5TUE
PER5WED
PER5THU
PER5FRI
PER5SAT
PER5SUN
PER5HOL
PER6OCC
PER6UNC
PER6MON
PER6TUE
PER6WED
PER6THU
PER6FRI
PER6SAT
PER6SUN
PER6HOL
PER7OCC
PER7UNC
PER7MON
PER7TUE
PER7WED
PER7THU
PER7FRI
PER7SAT
PER7SUN
PER7HOL
57
DEFAULT
MODE
MD01
MD02
MD03
MD05
MD06
MD07
MD09
MD10
MD13
MD14
MD15
MD16
MD17
MD18
MD19
MD20
MD21
MD23
MD24
MD25
ITEM
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Time Clock Mode and Sub-Mode Directory (cont)
ITEM EXPANSION
SCH.L (cont)
PER.8
LOCAL OCCUPANCY SCHEDULE
OCCUPANCY PERIOD 8
PER.8
OCC.8
Period Occupied Time
PER.8
UNC.8
Period Unoccupied Time
PER.8
MON.8 Monday In Period
PER.8
TUE.8
Tuesday In Period
PER.8
WED.8
Wednesday In Period
PER.8
THU.8
Thursday In Period
PER.8
FRI.8
Friday In Period
PER.8
SAT.8
Saturday In Period
PER.8
SUN.8
Sunday In Period
PER.8
HOL.8
Holiday In Period
OVR SCHEDULE OVERRIDE
OVR
OVR.T
Timed Override Hours
OVR
OVR.L
OVR
T.OVR
Override Time Limit
Timed Override
RANGE
0 to 6144
0 to 6144
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
NO/YES
0 to 4 hours
0 to 4 hours
NO/YES
XX:XX
XX:XX
X
X
UNITS CCN POINT
PER8OCC
PER8UNC
PER8MON
PER8TUE
PER8WED
PER8THU
PER8FRI
PER8SAT
PER8SUN
PER8HOL
OVR_EXT
OTL
TIMEOVER
Operating Mode and Sub-Mode Directory
RANGE UNITS 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
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
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
0
0
NO
DEFAULT
DEFAULT
58
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
APPENDIX A — LOCAL DISPLAY TABLES (cont)
Alarms Mode and Sub-Mode Directory
AXXX
TXXX
PXXX
AXXX
TXXX
PXXX
RANGE
NO/YES
UNITS CCN POINT
ALRESET
COMMENT
Alarms are shown as
AXXX
Alerts are shown as
TXXX
PreAlerts are shown as
PXXX
Alarms are shown as
AXXX
Alerts are shown as
TXXX
PreAlerts are shown as
PXXX
59
TABLE
A-UNIT
CIRCA_AN
CIRCADIO
OPTIONS
APPENDIX B — CCN TABLES
CCN DISPLAY TABLES
DISPLAY NAME
GENERAL UNIT PARAMETERS
RANGE
Control Mode
Occupied
CCN Chiller
Alarm State
Active Demand Limit
Override Modes in Effect
Percent Total Capacity
Requested Stage
Active Setpoint
Control Point
Degrees of Reset
Entering Fluid Temp
Leaving Fluid Temp
Emergency Stop
Minutes Left for Start
PUMPS
Cooler Pump Relay
Condenser Pump
Cooler Flow Switch
Off/On
Off/On
Off/On
CIRCUIT A ANALOG PARAMETERS
Percent Total Capacity NNN
Percent Available Cap.
Discharge Pressure
NNN
NNN.n
Suction Pressure
Head Setpoint
Saturated Condensing Tmp
Saturated Suction Temp
NNN.n
NNN.n
NNN.n
NNN.n
Compr Return Gas Temp
Discharge Gas Temp
Suction Superheat Temp
NNN.n
NNN.n
NNN.n
10-char ASCII
No/Yes
Stop/Start
6-char ASCII
NNN
No/Yes
NNN
NN
NNN.n
NNN.n
NN.n
NNN.n
NNN.n
Enable/EMStop
5-char ASCII
CIRCUIT A DISCRETE INPUTS/OUTPUTS
CIRC. A DISCRETE OUTPUTS
Compressor A1 Relay
Compressor A1 Unload Time
Compressor A2 Relay
Compressor A3 Relay
Minimum Load Valve Relay
CIRC. A DISCRETE INPUTS
Compressor A1 Feedback
Compressor A2 Feedback
Compressor A3 Feedback
Off/On
NN
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
UNIT PARAMETERS
UNIT ANALOG VALUES
Cooler Entering Fluid
Cooler Leaving Fluid
Condenser Entering Fluid
Condenser Leaving Fluid
Lead/Lag Leaving Fluid
TEMPERATURE RESET
4-20 ma Reset Signal
Outside Air Temperature
Space Temperature
DEMAND LIMIT
4-20 ma Demand Signal
Demand Limit Switch 1
Demand Limit Switch 2
CCN Loadshed Signal
MISCELLANEOUS
Dual Setpoint Switch
Cooler LWT Setpoint
Ice Done
NNN.n
NNN.n
NNN.n
NNN.n
NNN.n
NN.n
NNN.n
NNN.n
NN.n
Off/On
Off/On
N
Off/On
NNN.n
Off/On
%
% degF degF deltaF degF degF
%
%
PSIG
PSIG degF degF degF degF degF deltaF secs degF degF degF degF degF milliAmps degF degF degF
UNITS milliAmps
POINT NAME
STAT
OCC
CHIL_S_S
ALM
DEM_LIM
MODE
CAP_T
STAGE
SP
CTRL_PNT
DEG_RST
EWT
LWT
EMSTOP
MIN_LEFT
COOLPUMP
CONDPUMP
COOLFLOW
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
COOL_EWT
COOL_LWT
COND_EWT
COND_LWT
DUAL_LWT
RST_MA
OAT
SPT
LMT_MA
DMD_SW1
DMD_SW2
DL_STAT
DUAL_IN
LWT_SP
ICE_DONE
WRITE STATUS forcible forcible forcible forcible forcible forcible
60
APPENDIX B — CCN TABLES (cont)
TABLE
STRTHOUR
CURRMODS
ALARMS
DISPLAY 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
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
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
CCN MAINTENANCE TABLES
RANGE UNITS
NNNNNN
NNNNNN
NNNNNN.n
NNNNNN.n
NNNNNN.n
NNNNNN
NNNNNN
NNNNNN
NNNNNN.n
NNNNNN.n
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
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 hours hours hours hours hours hours
POINT NAME
HR_MACH
CY_MACH
HR_A1
HR_A2
HR_A3
CY_A1
CY_A2
CY_A3
HR_CPUMP
HR_DPUMP
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
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
WRITE STATUS
61
TABLE
VERSIONS
LOADFACT
LEARNFNS
PM-STRN
TESTMODE
RUNTEST
APPENDIX B — CCN TABLES (cont)
CESR131333-
CESR131482-
CESR131174-
CESR131171-
CESR131227-
CAPACITY 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
SCT Delta for Comp A1
SCT Delta for Comp A2
SCT Delta for Comp A3
Strainer Srvc Interval
Strainer Srvc Countdown
Strainer Maint. Done
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Strainer Maint. Date
Service Test Mode
Compressor A1 Relay
Compressor A2 Relay
Compressor A3 Relay
Cooler Pump Relay
Condenser Pump
Comp A1 Unload Time
Remote Alarm Relay
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
CCN MAINTENANCE TABLES (cont)
DISPLAY NAME RANGE
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
5-char ASCII
5-char ASCII
5-char ASCII
5-char ASCII
5-char ASCII
NNN
NNN.n
NNN.n
NNN.n
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
NNN.n
NNN.n
NNN.n
NNNNN
NNNNN
No/Yes
15-char ASCII
15-char ASCII
15-char ASCII
15-char ASCII
15-char ASCII
Off/On
Off/On
Off/On
Off/On
Off/On
Off/On
NN
Off/On degF degF degF deltaF deltaF deltaF hours hours secs
%
%
PSIG
PSIG degF degF degF degF deltaF degF degF degF degF degF degF
UNITS
SI_STRNR
ST_CDOWN
ST_MAINT
STRN_PM0
STRN_PM1
STRN_PM2
STRN_PM3
STRN_PM4
NET_CTRL
S_A1_RLY
S_A2_RLY
S_A3_RLY
S_CLPMP
S_CNDPMP
S_A1ULTM
S_ALM
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
POINT NAME
AUX
MBB
EMM
MARQUEE
NAVIGATOR
SMZ
CTRL_PNT
EWT
LWT
MODE_5
MODE_9
MODE_16
MODE_17
MODE_18
MODE_23
A1SCTDT
A2SCTDT
A3SCTDT
62
DUALCHIL
TABLE
APPENDIX B — CCN TABLES (cont)
CCN MAINTENANCE TABLES (cont)
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
%
% degF degF degF degF degF degF degF degF
%
%
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
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
N
NNN
NNN
NNN
NNN
NN.n
No/Yes
NN
OPTIONS 1 CONFIGURATION
Cooler Fluid N
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
CCN CONFIGURATION TABLES
RANGE DEFAULT
No/Yes
Disable/Enable
Disable/Enable
Disable/Enable
Disable/Enable
Off/On
NN
No/Yes
N
UNITS POINT NAME
Unit Dependent
Unit Size tons
Unit Size Dependent tons
Unit Size Dependent tons
Unit Size Dependent tons
9.0 deg F
Unit Dependent deltaF
10 - 015 to 030
7 - 035 to 045 secs
1=Water
No
Disable
Disable
Enable
Enable
Off
1
No
0=No Conrol
Disable
Disable
UNIT_TYP
SIZE
SIZE_A1
SIZE_A2
SIZE_A3
SH_SP
CPA1TYPE
MAXULTME
1=Water
2=Medium Temperature
Brine
FLUIDTYP mins
0=No Control
1=On When Occupied
2=On with Compressors
MLV_FLG
RGT_ENA
OAT_ENA
CSB_ENA
REVR_ENA
CPC
PUMP_DLY
EMM_BRD
CONDPMPE
CONDWTRS
CONDFLSW
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
N
N
N
N
Disable/Enable
NN.n
NN
N.n
Disable/Enable
NN
N
N
No/Yes
0
1
1
0
Enable
60.0
0
1.0
Disable
1
0
0
No deltaF mins hours hours
CONTROL
SEQ_TYPE
LEAD_TYP
CLSP_TYP
RAMP_EBL
LCW_LMT
DELAY
Z_GAIN
ICE_CNFG
SCHEDNUM
OTL
OVR_EXT
TIMEOVER
63
TABLE
RESETCON
DUALCHILL
DISPLAY
APPENDIX B — CCN TABLES (cont)
CCN CONFIGURATION TABLES (cont)
DISPLAY NAME RANGE
TEMPERATURE RESET AND DEMAND LIMIT
COOLING RESET
Cooling Reset Type
4-20 MA RESET
4-20 - Degrees Reset
N
NNN.n
REMOTE RESET
Remote - No Reset Temp
Remote - Full Reset Temp
Remote - Degrees Reset
NNN.n
NNN.n
NNN.n
RETURN TEMPERATURE RESET
Return - No Reset Temp NNN.n
Return - Full Reset Temp
Return - Degrees Reset
NNN.n
NNN.n
DEMAND LIMIT
Demand Limit Select
Demand Limit at 20 mA
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time
Demand Limit Switch 1
Demand Limit Switch 2
N
NNN.n
NN
NN
NNN
NNN
NNN
DUAL CHILLER CONFIGURATION SETTINGS
LEAD/LAG
Lead/Lag Chiller Enable
Master/Slave Select
Disable/Enable
Master/Slave
Slave Address
Lead/Lag Balance Select
Lead/Lag Balance Delta
Lag Start Delay
Parallel Configuration
NNN
N
NNN
NN
No/Yes
MARQUEE DISPLAY SETUP
Service Password
Password Enable
Metric Display
Language Selection
NNNN
Disable/Enable
Off/On
N
0
10.0
10.0
0.0
0.0
10.0
0.0
0.0
0
100.0
0
0
60
80
50
DEFAULT
Disable
Master
2
0
168
5
Yes
1111
Enable
Off
0 deltaF degF degF deltaF deltaF deltaF deltaF
%
% mins
%
% hours mins
UNITS
TABLE
SERVICE
DISPLAY NAME
SERVICE
Brine Freeze Point
COMPRESSOR ENABLE
Enable Compressor A1
Enable Compressor A2
Enable Compressor A3
CCN SERVICE TABLES
RANGE DEFAULT
NNN.n
Disable/Enable
Disable/Enable
Disable/Enable
34.0
Unit Dependent
Unit Dependent
Unit Dependent
TABLE
SETPOINT
DISPLAY NAME
SETPOINT
COOLING
Cooling Setpoint 1
Cooling Setpoint 2
ICE Setpoint
RAMP LOADING
Cooling Ramp Loading
Brine Freeze Point
NNN.n
NNN.n
NNN.n
N.n
NNN.n
CCN SETPOINT TABLES
RANGE DEFAULT
44.0
44.0
32.0
1.0
34.0
degF
UNITS degF degF degF degF
UNITS
POINT NAME
CRST_TYP
MA_DEG
REM_NO
REM_FULL
REM_DEG
RTN_NO
RTN_FULL
RTN_DEG
DMD_CTRL
DMT20MA
SHED_NUM
SHED_DEL
SHED_TIM
DLSWSP1
DLSWSP2
LL_ENA
MS_SEL
SLV_ADDR
LL_BAL
LL_BAL_D
LL_DELAY
PARALLEL
PASSWORD
PASS_EBL
DISPUNIT
LANGUAGE
POINT NAME
BRN_FRZ
ENABLEA1
ENABLEA2
ENABLEA3
POINT NAME
CSP1
CSP2
CSP3
CRAMP
BRN_FRZ
64
APPENDIX C — BACNET COMMUNICATION OPTION
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.
8
7
9
6
0
45
1
2
3
8
7
9
6
0
45
1
2
3
10's
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)
Tx1 LED
Rx1 LED
Tx2 LED
Rx2 LED
EIA-485
JUMPERS
POWER LED
2 3
4
6
7 8
09
1
4
6
7
8
09
1
3 2
BACNET
BAUD RATE
DIP SWITCHES
ADDRESS
ROTARY
SWITCHES
RUN LED
ERROR LED
Fig. A — UPC Open Controller
65
* Sponsored by ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers).
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
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.
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.
Fig. D — Network Wiring
66
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Fig. E — BT485 Terminator Installation
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 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.
SPECIFICATION
Cable
Conductor
Insulation
Color Code
Twist Lay
Shielding
Jacket
DC Resistance
Capacitance
Characteristic Impedance
Weight
UL Temperature Rating
Voltage
Listing
LEGEND
AWG — American Wire Gage
CL2P — Class 2 Plenum Cable
DC
FEP
— Direct Current
— Fluorinated Ethylene Polymer
NEC
O.D.
TC
UL
— National Electrical Code
— Outside Diameter
— Tinned Copper
— Underwriters Laboratories
Table C — MS/TP Wiring Recommendations
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
67
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Table D — Open System Wiring Specifications and Recommended Vendors
Wire Type
WIRING SPECIFICATIONS
Description
MS/TP
Network (RS-485)
22 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide for specifications.
24 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide for specifications.
4 conductor, unshielded, CMP, 18 AWG, plenum rated. Rnet
LEGEND
AWG — American Wire Gage
CL2P — Class 2 Plenum Cable
CMP
FEP
TC
— Communications Plenum Rated
— Fluorinated Ethylene Polymer
— Tinned Copper
RECOMMENDED VENDORS AND PART NUMBERS
Connect Air
International
W221P-22227
W241P-2000F
Belden
—
82841
W184C-2099BLB 6302UE
RMCORP
25160PV
25120-OR
21450
Contractors
Wire and Cable
CLP0520LC
—
CLP0442
LOCAL ACCESS TO THE UPC OPEN CONTROL-
LER — The user can use a BACview 6 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 BACview 6 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 BACview 6 device.
To order a BACview 6 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) 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 BACview 6 display.
Navigation: BACview→CCN
Home: Element Comm Stat
Element: 1
Bus: 0
Fig. F — BACview 6 Device Connection
68
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
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 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.
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 ERROR LED
2 flashes per second Off
2 flashes per second 2 flashes, alternating with Run LED
2 flashes per second 3 flashes, then off
2 flashes per second 1 flash per second
Normal
STATUS
Five minute auto-restart delay after system error
Controller has just been formatted
Controller is alone on the network
2 flashes per second On
5 flashes per second On
Exec halted after frequent system errors or control programs halted
Exec start-up aborted, Boot is running
5 flashes per second Off Firmware transfer in progress, Boot is running
7 flashes per second 7 flashes per second, alternating with Run LED Ten second recovery period after brownout
14 flashes per second 14 flashes per second, alternating with Run LED Brownout
69
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
Cooler Freeze Protection
Cooler Leaving Fluid
Cooler LWT Setpoint
Cooler Pump Relay
Cooler Pump Run Hours
Cooler Pump Shutdown Dly
Cooling Ramp Loading
Cooling Reset Type
Cooling Setpoint 1
Cooling Setpoint 2
CSM controlling Chiller
Demand Level 1
Demand Level 2
Demand Level 3
Demand Limit Select
Demand Limit Switch 1
Demand Limit Switch 2
Demand/Sound Limited
Discharge Gas Temp
Discharge Pressure
LEGEND
R — Read
W — Write
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Table G — Network Points List
DEFAULT
VALUE
CCN POINT
NAME
LMT_MA
RST_MA
DEM_LIM
SP
ALM
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
CONTROL
STAT
CTRL_PNT
COOL_EWT
COOLFLOW
FLUIDTYP
MODE_16
COOL_LWT
LWT_SP
COOLPUMP
HR_CPUMP
PUMP_DLY
CRAMP
CRST_TYP
CSP1
CSP2
MODE_1
DMD_CTRL
DMD_SW1
DMD_SW2
MODE_15
DISGAS
DP_A
R
R/W
R
R
R
R
R
R/W
R/W
R
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R
R
R
R
R
R
R
R
READ/
WRITE
R
R
R/W
R
R
R
R
R
R/W
R/W
R
R
UNITS mA mA
%
°F sec
°F hr hr hr
°F
°F hr
°F
°F
°F
°F hr min
°F
°F
°F
°F psig
100
Start
44.0
1
1.0
44.0
44.0
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
BV:59
MSV:5
MSV:7
MSV:8
BV:25
BV:26
BV:41
AV:15
AV:13
BV:17
BV:14
AV:61
AV:69
BV:18
BV:15
AV:62
AV:70
BV:4
AV:37
AV:78
AV:20
BV:16
BV:13
AV:60
AV:68
AV:10
AV:18
BV:2
AV:72
AV:8
AV:5
AV:30
BV:11
MSV:4
BV:42
AV:31
AV:38
BV:7
AV:71
AV:41
AV:56
AV:53
AV:54
BV:30
AV:80
AV:81
AV:82 crst_typ1_msv_1 csp1_1 csp2_1 mode_1_1 dmv_lvl_1_perct_1 dmv_lvl_2_perct_1 dmv_lvl_3_perct_1 dmd_ctrl_msv_1 dmd_sw1_1 dmd_sw2_1 mode_15_1 disgas_1 dp_a_1
BACNET
OBJECT NAME lmt_ma_1 rst_ma_1 dem_lim_1 sp_1 alm_1 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 control_msv_1 stat_1 ctrl_pnt_1 cool_ewt_1 coolflow_1 fluidtyp_msv_1 mode_16_1 cool_lwt_1 lwt_sp_1 coolpump_1 hr_cpump_1 pump_dly_1 cramp_1
70
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
APPENDIX C — BACNET COMMUNICATION OPTION (cont)
Table G — Network Points List (cont)
CCN POINT
NAME
MODE_13
DUAL_IN
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
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
TMP_SSTA
MODE_9
SPT
MODE_20
ST_MAINT
ST_CDOWN
SI_STRNR
SP_A
SH_A
MODE_14
MODE_6
MODE_2
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R/W
R
R/W
R
R
R
R/W
R
R
R
R
R
R
R/W
R
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R/W
R
R
R/W
R
READ/
WRITE
R
R
R
R/W
R
R
UNITS
°F
°F
°F
°F hr min min
°F
%
%
%
°F
°F
°F hr hr psig
°F
DEFAULT
VALUE
Enabled
32.0
1
0
RANGE
On/Off
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
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
-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
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
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:38
AV:39
AV:42
BV:2008
AV:1003
BV:5
AV:12
AV:3
BV:51
BV:43
AV:57
AV:58
BV:45
BV:32
BV:49
BV:79
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 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
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
71
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
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?
Has a claim been filed with the shipper?
Will this damage prevent unit start-up?
Check power supply. Does it agree with unit?
Has the circuit protection been sized and installed properly?
Are the power wires to the unit sized and installed properly?
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
YES NO
Has the ground wire been connected?
Are all electrical terminals tight?
System fluid volume in the loop ____________________gal (l)
Does this meet installation guide requirements?
Water system cleaned per installation guide?
Minimum flow rates verified per installation guide?
YES NO
YES NO
YES NO
In-line minimum 40-mesh strainer installed within 10 ft of the cooler/condenser water inlet?
Cooler:
Condenser:
Air separation / bleed devices installed per installation guide?
YES NO
YES NO
YES NO
C. Cooler Loop Freeze Protection (if required)
Gallons (liters) added:________________
Piping includes electric tape heaters if piping is exposed to temperatures below freezing? YES NO
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
(30MPA ONLY)
Has the refrigerant piping been done per the installation guide?
Piping dehydrated and evacuated per installation guide?
Unit charged per the installation guide?
YES NO
YES NO
YES NO
YES NO Crankcase heaters have been energized for a minimum of 24 hours prior to start-up?
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.
Liquid line service valve is back seated (30MPA units only).
YES NO
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?
YES NO
CL-2
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
C. Unit Start-Up (cont)
Record Software Versions
MODE — RUN STATUS
VERS
MBB
EMM
AUX1
MARQ
NAVI
SOFTWARE VERSION NUMBERS
CESR131482-xx-xx
CESR131174-xx-xx
CESR131333-xx-xx
CESR131171-xx-xx
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.
SUBMODE
UNIT
ITEM
TYPE
SIZE
SZA.1
SZA.2
SZA.3
A1.TY
MAX.T
UNIT (Configuration Settings)
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
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:
SUBMODE
OPT1
ITEM
FLUD
MLV.S
RG.EN
OAT.E
CSB.E
CPC
PM.DY
D.PM.E
D.FL.S
CDWS
OPTIONS1 (Options Configuration)
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.
DISPLAY
X
NO/YES
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
OFF/ON
XX MIN
DSBL/ENBL
DSBL/ENBL
DSBL/ENBL
ENTRY
ENTRY
CL-4
C. Unit Start-Up (cont)
SUBMODE
OPT2
ITEM
CTRL
LCWT
DELY
ICE.M
OPTIONS2 (Options Configuration)
ITEM EXPANSION
UNIT OPTIONS 2 CONTROLS
CONTROL METHOD
HIGH LCW ALERT LIMIT
MINUTES OFF TIME
ICE MODE ENABLE
DISPLAY
X
XX.X
F
XX
DSBL/ENBL
ENTRY
Press ESCAPE key to display ‘OPT2’. Press down arrow key to display ‘CCN’.
Press ENTER key.
Record configuration information below.
SUB-MODE
CCN
ITEM
CCNA
CCNB
BAUD
CCN (CCN Network Configuration)
ITEM EXPANSION
CCN ADDRESS
CCN BUS NUMBER
CCN BAUD RATE
DISPLAY
XXX
XXX
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:
SUBMODE
COOL
HEAD
FRZ
ITEM
CSP.1
CSP.2
CSP.3
H.DP
BR.FZ
SETPOINT
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
XXX.X °F
XXX.X °F
XXX.X °F
XXX.X °F
XX.X °F
ENTRY
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 ILLU-
MINATE 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
C. Unit Start-Up (cont)
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.
SUB-MODE
KEYPAD
ENTRY
ENTER
TEST
OUTS
CMPA
ENTER
ENTER
ITEM DISPLAY
OFF/ON
SERVICE TEST
ITEM
EXPANSION
SERVICE TEST MODE
CLR.P
OFF/ON
OUTPUTS AND PUMPS
COOLER PUMP RELAY
CND.P
OFF/ON
UL.TM
0 TO 15
CC.H
OFF/ON
CW.VO
OFF/ON
CW.VC
OFF/ON
LL.SV
OFF/ON
RMT.A
OFF/ON
CC.A1
OFF/ON
UL.TM
0 TO 15
CC.A2
OFF/ON
CC.A3
OFF/ON
MLV OFF/ON
CONDENSER PUMP
COMP A1 UNLOAD TIME
CRANKCASE HEATER
CONDENSER VALVE OPEN
CONDENSER VALVE CLOSE
LIQUID LINE SOLENOID
REMOTE ALARM RELAY
CIRCUIT A COMPRESSOR TEST
COMPRESSOR A1 RELAY
COMP A1 UNLOAD TIME
COMPRESSOR A2 RELAY
COMPRESSOR A3 RELAY
MINIMUM LOAD VALVE RELAY
COMMENT
To Enable Service Test Mode, move Enable/Off/Remote
Contact switch to OFF. Change
TEST to ON. Move switch to
ENABLE.
Completed
(Yes/No)
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
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
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 CL-8 12-13 Replaces: 30MP-1T
advertisement
Key Features
- ComfortLink controls
- Scroll Compressors
- Microprocessor-based control system
- Multiple Compressor Stages
- Energy Management Module
- Temperature Reset
- Demand Limit Control
- Preventive Maintenance Schedule
