Carrier 19XR Operating instructions

19XR PIC II/19XRV PIC III
Hermetic Centrifugal Liquid
Chillers
Nominal cooling capacity 1000 - 5300 kW
50 Hz
Installation, operation and maintenance instructions
Contents
INITIAL START-UP CHECKLIST FOR 19XR HERMETIC CENTRIFUGAL LIQUID CHILLERS.......................... 5
19XR HERMETIC CENTRIFUGAL LIQUID CHILLER CONFIGURATION SETTINGS LOG................................ 7
1 - SAFETY CONSIDERATIONS................................................................................................................................................ 8
1.1 - Installation safety considerations............................................................................................................................................ 8
1.2 - Maintenance safety considerations......................................................................................................................................... 8
1.3 - Operating checks, valves........................................................................................................................................................... 9
1.4 - Equipment and components under pressure......................................................................................................................... 9
1.5 - Repair safety considerations.................................................................................................................................................... 9
2 - INTRODUCTION AND CHILLER FAMILIARISATION............................................................................................. 10
2.1 - CE marking.............................................................................................................................................................................. 10
2.2 - Abbreviations and explanations............................................................................................................................................ 10
2.3 - Chiller familiarization 19XR.................................................................................................................................................. 11
3 - INSTALLATION....................................................................................................................................................................... 15
3.1 - Introduction............................................................................................................................................................................. 15
3.2 - Receiving the machine............................................................................................................................................................ 15
3.3 - Rigging the machine and dimensional information............................................................................................................ 16
3.4 - Install machine supports......................................................................................................................................................... 22
3.5 - Connection of water piping.................................................................................................................................................... 24
3.6 - Make electrical connections................................................................................................................................................... 27
3.7 - Install field insulation.............................................................................................................................................................. 32
3.8 - Installation of a refrigerant leak detection module (option 159) ....................................................................................... 34
4 - BEFORE INITIAL START-UP.............................................................................................................................................. 36
4.1 - Necessary checks..................................................................................................................................................................... 36
4.2 - Chiller tightness....................................................................................................................................................................... 37
4.3 - Standing vacuum test.............................................................................................................................................................. 38
4.4 - Chiller dehydration ................................................................................................................................................................ 38
4.5 - Inspect wiring........................................................................................................................................................................... 40
4.6 - Oil charge................................................................................................................................................................................. 40
4.7 - Power-up the controls and check the oil heater................................................................................................................... 40
4.8 - Check optional pumpout system controls and compressor................................................................................................ 41
4.9 - High altitude locations............................................................................................................................................................ 41
4.10 - Charge refrigerant into chiller............................................................................................................................................. 41
4.11 - 19XR Chiller equalization without pumpout unit............................................................................................................. 41
4.12 - 19XR Chiller equalization with pumpout unit.................................................................................................................. 41
4.13 - Trimming refrigerant charge ............................................................................................................................................... 42
5 - INITIAL START-UP................................................................................................................................................................ 42
5.1 - Preparation.............................................................................................................................................................................. 42
5.2 - Dry run to test start-up sequence.......................................................................................................................................... 42
5.3 - Check rotation ........................................................................................................................................................................ 42
5.4 - Check oil pressure and compressor stop ............................................................................................................................. 43
5.5 - To prevent accidental start-up............................................................................................................................................... 43
5.6 - Check chiller operating condition......................................................................................................................................... 43
5.7 - Instruct the customer operator.............................................................................................................................................. 43
6 - OPERATING INSTRUCTIONS............................................................................................................................................ 44
6.1 - Operator duties ...................................................................................................................................................................... 44
6.2 - To start the chiller.................................................................................................................................................................... 44
6.3 - Check the running system...................................................................................................................................................... 44
6.4 - To stop the chiller ................................................................................................................................................................... 44
6.5 - After limited shutdown........................................................................................................................................................... 44
6.6 - Extended shutdown................................................................................................................................................................ 44
6.7 - After extended shutdown....................................................................................................................................................... 45
6.8 - Cold-weather operation......................................................................................................................................................... 45
6.9 - Manual guide vane operation................................................................................................................................................ 45
6.10 - Refrigeration log .................................................................................................................................................................. 45
7 - MAINTENANCE...................................................................................................................................................................... 47
7.1 - General maintenance.............................................................................................................................................................. 47
7.2 - Weekly maintenance............................................................................................................................................................... 48
7.3 - Scheduled maintenance ......................................................................................................................................................... 49
APPENDIX: Particulars OF 19XRV PIC III machines.......................................................................................... 53
8 - 19XRV PIC III - safety considerations for maintenance.................................................................... 53
8.1 Electrical maintenance.............................................................................................................................................................. 53
8.2 - Mechanical maintenance........................................................................................................................................................ 53
2
9 - 19XRV PIC III - Equipment presentation............................................................................................................ 58
9.1 - Environmental conditions...................................................................................................................................................... 58
9.2 - CE marking.............................................................................................................................................................................. 58
9.3 - Description of electrical equipment elements..................................................................................................................... 58
9.4 - General compressor speed control principles...................................................................................................................... 60
9.5 - Variable-frequency drive cooling........................................................................................................................................... 60
9.6 - Flow detection by the saturated suction temperature sensor............................................................................................ 61
9.7 - Electrical specifications.......................................................................................................................................................... 61
10 - 19XRV PIC III - INSTALLATION Instructions AND ELECTRICAL CONNECTION................................. 61
10.1 - Introduction........................................................................................................................................................................... 61
10.2 - Receiving the machine.......................................................................................................................................................... 61
10.3 - Physical data.......................................................................................................................................................................... 61
10.4 - Location of connection points and interfaces.................................................................................................................... 62
10.5 - Electrical connections........................................................................................................................................................... 62
10.6 - Equipment details................................................................................................................................................................. 62
11 - 19XRV PIC III - before the initial start up.................................................................................................... 62
11.1 - Before energizing the unit.................................................................................................................................................... 62
11.2 - Start-up checks...................................................................................................................................................................... 63
11.3 - Control checks....................................................................................................................................................................... 63
12 - 19XRV PIC III - initial start-up................................................................................................................................ 64
12.1 - Motor rotation check............................................................................................................................................................ 64
12.2 - Compressor start-up............................................................................................................................................................. 64
13 - 19XRV PIC III - operating mode.............................................................................................................................. 64
13.1 - Shutdown controlled by the machine................................................................................................................................. 64
13.2 - Manual override commands................................................................................................................................................ 64
13.3 - Gateway communication module status LEDs................................................................................................................. 64
13.4 - Power module status LEDs.................................................................................................................................................. 65
13.5 - Safety shutdowns and cuts................................................................................................................................................... 65
14 - 19XRV PIC III - MAINTENANCE..................................................................................................................................... 66
14.1 - Special precautions during maintenance............................................................................................................................ 66
14.2 - Periodic maintenance........................................................................................................................................................... 66
APPENDIX: PARTICULARS OF 19XR PIC II UNITS WITH INTEGRATED PROGRESSIVE ElectroniC
STARTER........................................................................................................................................................................................ 67
15 - Maintenance safety considerations........................................................................................................... 67
16 - Equipment presentation........................................................................................................................................ 67
16.1 - Environmental conditions.................................................................................................................................................... 67
16.2 - CE marking............................................................................................................................................................................ 67
16.3 - Description of electrical equipment elements................................................................................................................... 67
16.4 - Soft starter operation............................................................................................................................................................ 68
16.5 - Control box cooling.............................................................................................................................................................. 68
16.6 - Electrical specifications........................................................................................................................................................ 68
17 - Installation instructions and electrical connection............................................................... 68
17.1 - Introduction........................................................................................................................................................................... 68
17.2 - Receiving the machine.......................................................................................................................................................... 68
17.3 - Physical data.......................................................................................................................................................................... 68
17.4 - Location of connection points and interfaces.................................................................................................................... 68
17.5 - Electrical connections........................................................................................................................................................... 68
17.6 - Equipment details................................................................................................................................................................. 69
18 - Before the initial start-up.................................................................................................................................. 69
18.1 - Wiring and installation inspection....................................................................................................................................... 69
18.2 - Start-up checks...................................................................................................................................................................... 69
18.3 - PIC control checks................................................................................................................................................................ 70
19 - Initial start-up.............................................................................................................................................................. 70
19.1 - Motor rotation check............................................................................................................................................................ 70
19.2 - Compressor start-up and starter control adjustment........................................................................................................ 71
20 - Operation ......................................................................................................................................................................... 71
20.1 - Machine shut-down............................................................................................................................................................... 71
20.2 - Fault diagnosis....................................................................................................................................................................... 71
20.3 - Reset after a fault.................................................................................................................................................................. 71
21 - Maintenance.................................................................................................................................................................... 71
21.1 - Isolation check . .................................................................................................................................................................... 71
21.2 - Periodic maintenance........................................................................................................................................................... 71
3
List of figures
Fig. 1 - Model number nomenclature............................................................................................................................................ 11
Fig. 2 - 19XR machine components............................................................................................................................................... 12
Fig. 3 - Typical 19XR unit diagram................................................................................................................................................ 13
Fig. 4 - Lubrication system.............................................................................................................................................................. 14
Fig. 5 - Machine rigging guide........................................................................................................................................................ 16
Fig. 6 - Reference diagram, machine operating weights.............................................................................................................. 17
Fig. 7 - 19XR Cooler side view....................................................................................................................................................... 18
Fig. 8 - 19XR Chiller top view........................................................................................................................................................ 18
Fig. 9 - 19XR Compressor detail.................................................................................................................................................... 19
Fig. 10 - 19XR Rear view................................................................................................................................................................ 19
Fig. 11 - Dimensional drawing........................................................................................................................................................ 20
Fig. 12 - Standard isolation............................................................................................................................................................. 22
Fig. 13 - 19XR Chiller footprint..................................................................................................................................................... 22
Fig. 14 - Levelling accessory for 19XR units................................................................................................................................. 23
Fig. 15 - 19XR Spring isolation....................................................................................................................................................... 23
Fig. 16 - Typical nozzle piping (not supplied by Carrier)............................................................................................................ 24
Fig. 17 - Standard waterboxes and nozzle arrangements............................................................................................................ 25
Fig. 18 - Optional pumpout system piping schematic with storage tank................................................................................... 26
Fig. 19 - Pumpout system piping schematic without storage tank............................................................................................. 26
Fig. 20 - Relief device locations...................................................................................................................................................... 27
Fig. 21 - Unit with unit-mounted starter/variable-frequency drive............................................................................................ 29
Fig. 22 - Unit with separate starter/variable-frequency drive..................................................................................................... 30
Fig. 23 - Diameter and distance between terminals for the wiring between compressor starter and motor........................ 31
Fig. 24 - COMM1 CCN communication wiring for multiple 19XR chillers (typical).............................................................. 32
Fig. 25 - Machine isolation.............................................................................................................................................................. 33
Fig. 26 - View of module in the control box.................................................................................................................................. 34
Fig. 27 - Detector support fixing..................................................................................................................................................... 35
Fig. 28 - Detector fixing................................................................................................................................................................... 35
Fig. 29 - Changing SW2 switch 1.................................................................................................................................................... 35
Fig. 30 - Dehydration cold trap...................................................................................................................................................... 39
Fig. 31 - 19XR leak detection procedure...................................................................................................................................... 37
Fig. 32 - Rotation diagram.............................................................................................................................................................. 43
Fig. 33 - Refrigeration log............................................................................................................................................................... 46
Fig. 34 - Guide vane actuator linkage............................................................................................................................................ 48
Fig. 35 - 19XR float valve design.................................................................................................................................................... 50
Fig. 36 - Compressor fits and clearances....................................................................................................................................... 51
Fig. 37 - VFD cooling circuit........................................................................................................................................................... 54
Fig. 38 - VFD box installation (rear view).................................................................................................................................... 54
Fig. 39 - VFD tunnel-side view....................................................................................................................................................... 55
Fig. 40 - Lifting the VFD................................................................................................................................................................. 55
Fig. 41 - Detailed perspective view of the unit............................................................................................................................. 56
Fig. 42 - Unit rear/side view............................................................................................................................................................ 57
Fig. 43 - VFD box support installation.......................................................................................................................................... 57
Fig. 44 - Compressor details............................................................................................................................................................ 57
Fig. 45 - VFD box installation (front view)................................................................................................................................... 57
Fig. 46 - Variable-frequency drive cabinet for machines with maximum nominal current up to 608 A................................ 59
Fig. 47 - Variable-frequency drive cabinet for machines with maximum nominal current above 608 A............................... 59
Fig. 48 - Typical 19XRV unit diagram............................................................................................................................................ 60
Fig. 49 - Height of 19XRV with variable-frequency drive - 19XR-506---912 and 19XR-506---922........................................ 61
Fig. 50 - Height of 19XRV with variable-frequency drive - 19XR-506---802 and 19XR-506---81.......................................... 61
Fig. 51 - Location of the 19XRV isolation valves......................................................................................................................... 62
Fig. 52 - 19XRV Communication gateway.................................................................................................................................... 64
Fig. 53 - 19XRV Communication interface board....................................................................................................................... 66
Fig. 54 - Access to motor terminals................................................................................................................................................ 69
NOTE: The images in this document are for illustrative purposes only and are not part of any offer for sale or contract.
4
INITIAL START-UP CHECKLIST FOR 19XR HERMETIC CENTRIFUGAL LIQUID CHILLERS
Name:
_____________________________________________________________________________________________
Address: _____________________________________________________________________________________________
Town:
_____________________________________________________________________________________________
Country: _____________________________________________________________________________________________
Post code: _____________________________________________________________________________________________
Job No.: _____________________________________________________________________________________________
Model:
_____________________________________________________________________________________________
Serial No.: _____________________________________________________________________________________________
Design conditions
Evaporator
Cooling
capacity
Brine
Flow rate
Temperature
in
Temperature
out
Pressure
drop
Pass
Suction
temperature
Condensing
temperature
Condenser
Compressor: Voltage __________________ RLA _________________________
Starter:
Manufacturer _____________ Type __________________________
Oil pump:
Voltage __________________ RLA _________________________
OLTA _______________________
OLTA _______________________
Control circuit/crankcase heater:115 Volts ___________________________230 Volts ______________________________
Refrigerant: _________________ Type ______________________________ Charge, kg ____________________________
Carrier obligations:
Assemble:
Yes/No ____________
Leak test:
Yes/No ____________
Dehydrate:
Yes/No ____________
Charging:
Yes/No ____________
Operating instructions:
____________ Hours
Start-up to be performed in accordance with appropriate machine start-up instructions
Job data required:
1. Machine installation instructions 19XRYes/No ____________
2. Machine assembly, wiring and piping diagramsYes/No ____________
3. Starting equipment details and wiring diagramsYes/No ____________
4. Applicable design data (see above)Yes/No ____________
5. Diagrams and instructions for special controlsYes/No ____________
Initial machine pressure: __________________
Was machine tight?Yes/No ____________
If not, were leaks corrected?Yes/No ____________
Was machine dehydrated after repairs?Yes/No ____________
Check oil level and record:
Add oil:
Yes/No ____________
Amount:
___________________
Top sight glass
_______________ 3/4
_______________ 1/2
_______________ 1/4
Bottom sight glass
_______________ 3/4
_______________ 1/2
_______________ 1/4
Water-side pressure drops: Evaporator ________________ Condenser ________________________
Refrigerant charge:
Initial charge _______________ Final charge after trim ______________
Inspect wiring and record electrical data
Ratings
Motor voltage _____________________________________ Motor current ___________________________________
Oil pump voltage _____________________________________ Start-up current ___________________________________
Line voltages
Motor________________________ Oil pump ________________________ Control/oil heater ____________________
5
Field-installed starters only:
Check continuity T1 to T1, etc. (disconnect cables from terminals 4, 5 and 6 of the motor to the starter).
Megger starter: Do not megger a motor connected to a solid-state starter, unless the leads to the motor are disconnected
and meggered.
Motor
10-second readings
60-second readings
Polarization ratio
Phase to phase
T1-T2
T1-T3
T2-T3
Phase to ground
T1-G
T2-G
T3-G
Starter:
Electro-mechanical ________________________________Electronic ___________________________________________
Motor load current transformer ratio ________ : _______ Signal resistor size ______________________________ Ohms
Transition timer time ______________________________ seconds
Check magnetic overloads:
Electronic starter:
Add dash pot oil
Solid-state overloads
Initial voltage
Ramp setting
Controls: safety, operating, etc
Perform controls test
Yes /No ____________________
Yes/No ______________________
Yes/No ______________________
_____________________________ Volts
_____________________________ seconds
CAUTION: Compressor motor and control centre must be properly and individually connected back to the earth
ground in the starter (in accordance with certified drawings).
Yes ________________
Run machine:
Do these safeties shut down the machine?
Condenser water flow switch:
Yes/No ______________________
Chilled water flow switch:
Yes/No ______________________
Pump interlocks:
Yes/No ______________________
Initial start:
Line up all valves in accordance with instruction manual: __________________________________________________
Start water pumps and establish water flow: ______________________________________________________________
Oil level and temperature correct: ______________________________________________________________________
Check oil pump rotation pressure ______________________________________________________________________
Check compressor motor rotation (motor end sight glass) and record direction. Clockwise or not ________________
Restart compressor. Bring up to speed. Shut down.
Any abnormal coastdown noise? Yes/No ______________________ If yes, determine cause __________________
Start machine and operate. Complete the following:
A. Trim charge and record. __________________________________________________________________________
B. Complete any remaining control calibration and record. _______________________________________________
C. Take at least 2 sets of operational log readings and record. _____________________________________________
D. After machine has been successfully run and set up, shut down and mark shut-down oil and refrigerant levels.
________________________________________________________________________________________________
E. Give operating instructions to owner's operating personnel. Hours given: ________________________________
F. Call your Carrier factory representative to report chiller start-up. _______________________________________
Date: __________________________
Carrier technician ___________________________________________________
Signature
Date: __________________________
Customer representative _____________________________________________
Signature
6
19XR HERMETIC CENTRIFUGAL LIQUID CHILLER CONFIGURATION SETTINGS LOG
(Remove and use for job file)
Controller name ___________________________________ Element No. _______________________________________
Table description ___________________________________
Bus No.: _______________________________________
Table name: SETPOINT
Setpoint table configuration sheet 19XR
Description
Base demand limit
LCW setpoint
ECW setpoint
Range
40 to 100
12.2 to 48.9
12.2 to 48.9
Units
%
°C
°C
Controller name ___________________________________ Element No. _______________________________________
Table description ___________________________________
Default
100
50
60
Value
Bus No.: _______________________________________
Table name: OCCP01S
Local mode time schedule configuration sheet - 19XR PIC control - OCCP01S
Period 1
Period 2
Period 3
Period 4
Period 5
Period 6
Period 7
Period 8
Day
M
T
W
T
F
Sa
Su
H
Hours
Occupied time
Unoccupied time
Note: Default setting is occupied 24 hours/day
Controller name ___________________________________ Element No. _______________________________________
Table description ___________________________________
Bus No.: _______________________________________
Table name: HOLIDEFS
Holiday configuration sheet
Description
Holiday start month
Holiday start day
Duration
Range
1-12
1-31
0-99
Controller name ___________________________________ Element No. _______________________________________
Table description ___________________________________
Units
Days
Value
Bus No.: _______________________________________
Table name: HOLIDEFS
Holiday configuration sheet
Description
Holiday start month
Holiday start day
Duration
Range
1-12
1-31
0-99
Units
Days
Value
7
1 - SAFETY CONSIDERATIONS
19XR liquid chillers are designed to provide safe and
reliable service when operated within design specifications.
When operating this equipment, use good judgment and
safety precautions to avoid damage to equipment and
property or injury to personnel.
Be sure you understand and follow the procedures and
safety precautions contained in the machine instructions as
well as those listed in this guide.
To find out, if these products comply with European directives (machine safety, low voltage, electromagnetic compatibility, equipment under pressure, etc.) check the declarations
of conformity for these products.
1.1 - Installation safety considerations
In certain cases the safety stops are installed on ball valves.
These valves are factory-supplied lead-sealed in the open
position. This system permits isolating and removing the
safety stop for checking and replacing. The safety stops
are designed and installed to ensure protection against fire
risk. Removing the safety stops is only permitted if the fire
risk is fully controlled and the responsibility of the user.
All factory-installed safety valves are lead-sealed to prevent
any calibration change. If a safety stop is removed for
checking or replacement please ensure that there is always
an active safety stop on each of the reversing valves
installed in the unit.
The safety valves must be connected to discharge pipes.
These pipes must be installed in a way that ensures that
people and property are not exposed to refrigerant leaks.
These fluids may be diffused in the air, but far away from
any building air intake, or they must be discharged in a
quantity that is appropriate for a suitably absorbing
environment.
Periodic check of the safety valves: See chapter 1.2 “Maintenance safety considerations”.
DANGER: Do not vent refrigerant relief valves within a
building. Outlet from relief valve must be vented outdoors.
The accumulation of refrigerant in an enclosed space can
displace oxygen and cause asphyxiation.
Provide adequate ventilation, especially for enclosed and
low overhead spaces. Inhalation of high concentrations
of vapour is harmful and may cause heart irregularities,
unconsciousness, or death. Misuse can be fatal. Vapour is
heavier than air and reduces the amount of oxygen available
for breathing. Product causes eye and skin irritation.
Decomposition products are hazardous.
Do not use oxygen to purge lines or to pressurise a machine
for any purpose. Oxygen gas reacts violently with oil,
grease, and other common substances.
Never exceed specified test pressures, verify the allowable
test pressure by checking the instruction literature and the
design pressures on the equipment nameplate.
8
Do not use air for leak testing. Use only refrigerant or dry
nitrogen.
Do not valve off any safety device. Be sure that all pressure
relief devices are properly installed before operating the
machine.
1.2 - Maintenance safety considerations
Engineers working on the electric or refrigeration components must be authorized, trained and fully qualified to do so.
All refrigerant circuit repairs must be carried out by a
trained person, fully qualified to work on these units. He
must have been trained and be familiar with the equipment
and the installation. All welding operations must be carried
out by qualified specialists.
During maintenance operations (such as a refrigerant charge
transfer or pumpdown) or leak repairs, that can result in a
significant pressure loss of saturated evaporation pressure,
the qualified technician must ensure that the heat exchanger
water pumps continue to operate to ensure a sufficient flow
rate and prevent evaporator freeze-up.
If there is a fault, the chiller control is wired to automatically control the water pumps and the cooling tower fans
to guarantee independent machine frost protection. If for
a specific installation water flow control and control of
the cooling towers must be done by another means, a
parallel Carrier control must be put in place.
Any manipulation (opening or closing) of a shut-off
valve must be carried out by a qualified and authorised
engineer. These procedures must be carried out with the
unit shut-down.
NOTE: The unit must never be left shut down with the
liquid line valve closed.
During any handling, maintenance and service operations
the engineers working on the unit must be equipped with
safety gloves, glasses, shoes and protective clothing.
WARNING: Do not weld or flamecut any refrigerant line or
vessel until all refrigerant (liquid and vapour) has been
removed from chiller. Traces of vapour should be displaced
with dry air nitrogen and the work area should be well
ventilated. Refrigerant in contact with an open flame
produces toxic gases.
Do not work on electrical components, including control
panels, switches, relays etc, until you are sure all power is
off; residual voltage can leak from capacitors or solid
state components. Lock open and tag electrical circuits
during servicing.
19XRV units: Additional precautions must be taken to
ensure that the power supply has been disconnected.
Please refer to chapter 8.
If work is interrupted, confirm that all circuits are deenergised before resuming work.
1.3 - Operating checks, valves
Operating checks:
Important information regarding the refrigerant used:
This product contains fluorinated greenhouse gas covered
by the Kyoto protocol.
Refrigerant type: R-134a
Global Warming Potential (GWP): 1300
Periodic inspections for refrigerant leaks may be required
depending on European or local legislation. Please contact
your local dealer for more information.
During the life-time of the system, inspection and tests
must be carried out in accordance with national regulations.
The information on operating inspections given in annex
C of standard EN378-2 can be used if no similar criteria
exist in the national regulations.
Safety device checks (annex C6 – EN378-2): The safety
devices must be checked on site once a year for safety
devices (high-pressure switches), and every five years for
external overpressure devices (safety valves).
For a detailed explanation of the high pressure switch test
method contact Carrier Service.
Do not attempt to repair or recondition any safety devices
when corrosion or build-up of foreign material (rust, dirt,
scale, etc.) is found within the valve body or mechanism.
If necessary, replace the device.
Do not install safety valves in series or backwards.
Provide a drain connection in the vent line near each
pressure relief device to prevent a build-up of condensate
or rain water.
1.4 - Equipment and components under pressure
These products incorporate equipment or components under
pressure, manufactured by Carrier or other manufacturers.
We recommend that you consult your appropriate national
trade association or the owner of the equipment or components under pressure (declaration, re-qualification, re-testing,
etc.). The characteristics of this equipment/these components
are given on the nameplate or in the required documentation, supplied with the products.
1.5 - Repair safety considerations
All installation parts must be maintained by the personnel in
charge, in order to avoid material deterioration and injuries
to people. Faults and leaks must be repaired immediately.
The authorised technician must have the responsibility to
repair the fault immediately. Each time repairs have been
carried out to the unit, the operation of the safety devices
must be re-checked.
If a leak occurs or if the refrigerant becomes polluted (e.g.
by a short circuit in a motor) remove the complete charge
using a recovery unit and store the refrigerant in mobile
containers. Repair the leak detected and recharge the
circuit with the total R-134a charge, as indicated on the
unit name plate.
Do not siphon refrigerant.
Avoid spilling liquid refrigerant on skin or getting it into
the eyes. Use safety goggles and safety gloves. Wash any
spills from the skin with soap and water. If liquid
refrigerant enters the eyes, immediately flush eyes with
water and consult a doctor.
Never apply an open flame or live steam to a refrigerant
cylinder. Dangerous overpressure can result. If it is
necessary to heat refrigerant, use only warm water.
DANGEROUS AND ILLEGAL: Do not reuse disposable
(non-returnable) cylinders or attempt to refill them. When
cylinders are emptied, evacuate remaining gas pressure,
loosen the collar and unscrew and discard the valve stem.
Do not incinerate.
After refrigerant draining operations, check the refrigerant
type before adding refrigerant to the machine. The introduction of the wrong refrigerant can cause damage or
malfunction to this machine.
Any use of these chillers with a different refrigerant must
be in accordance with applicable national standards.
Do not attempt to remove connections, components etc.,
while the machine is under pressure or operating. Make
sure that the pressure is 0 kPa, before disconnecting the
refrigerant connections.
ATTENTION: No part of the unit must be used as a
walkway, rack or support.
Periodically monitor and repair or if necessary replace
any component or piping that shows signs of damage.
Do not climb over a machine. Use platform, or staging.
Use mechanical equipment (crane, hoist, etc.) to lift or
move heavy components. Even if components are light,
use mechanical equipment when there is a risk of slipping
or losing your balance.
Do not use eyelets to lift any part of the machine or the
complete machine.
ATTENTION: Be aware that certain automatic start
arrangements can engage cooling tower fan or pumps.
Use only repair or replacement parts that meet the code
requirements of the original equipment.
Do not vent or drain waterboxes containing industrial
brines, without the permission of your process control group.
9
Do not loosen waterbox bolts until the waterbox has been
completely drained.
Do not loosen a packing gland nut before checking that
the nut has a positive thread engagement.
Periodically inspect all valves, fittings, and piping for
corrosion, rust, leaks, or damage.
During refrigerant removal and storage operations follow
applicable regulations. These regulations, permitting
conditioning and recovery of halogenated hydrocarbons
under optimum quality conditions for the products and
optimum safety conditions for people, property and the
environment are described in standard NFE 29795.
Any refrigerant transfer and recovery operations must be
carried out using a transfer unit. A 3/8” SAE connector on
the manual liquid line valve is supplied with all units for
connection to the transfer station. The units must never be
modified to add refrigerant and oil charging, removal and
purging devices. These devices are provided with the units.
Please see to the certified dimensional drawings for the units.
2 - INTRODUCTION AND CHILLER FAMILIARISATION
Prior to initial start-up of the 19XR unit, those involved in the
start-up, operation, and maintenance should be thoroughly
familiar with these instructions and other necessary job
data. This document is outlined so that you may become
familiar with the control system before performing start-up
procedures. Procedures in this manual are arranged in the
sequence required for proper chiller start-up and operation.
19XRV units: Special qualifications are required for
personnel commissioning these machines or working on
the variable-frequency drive.
Transport and storage of 19XR units
The minimum and maximum allowable outside temperatures
are:
Minimum temperature = -20°C
Maximum temperature = +48°C.
Operating limits
• The operating range of the selected unit must always
be verified at full load and part load by the selection
program for the chosen configuration.
• The selection program values apply. If they are outside
the operating limits below, the selection must be
validated by the factory customer support team.
Operating range for 19XR/XRV units during operation
Evaporator
Minimum
Evaporator entering water temperature, °C
7
Evaporator leaving water temperature, °C
3.3
Condenser (water-cooled)
Minimum
Condenser entering water temperature, °C
12.8
Condenser leaving water temperature, °C
29
•
Maximum
20
12
Maximum
35
45
Negative evaporator temperature applications are
possible depending on the temperature conditions at
the condenser. Please refer to the selection program
to determine the operating routine possibilities.
• Unit selections are available from the Carrier sales teams.
10
WARNING: Do not short or jumper between terminations
on circuit boards or modules; control or board failure
may result.
Be aware of electrostatic discharge (static electricity)
when handling or making contact with circuit boards or
module connections. Always touch a chassis (grounded)
part to dissipate body electrostatic charge before working
inside control centre.
Use extreme care when handling tools near boards and
when connecting or disconnecting terminal plugs. Circuit
boards can easily be damaged.
The electromagnetic emission and immunity levels comply
with the requirements for an industrial environment and
are not designed for operation in a residential environment.
This equipment uses, and can radiate, radio frequency
energy. If not installed and used in accordance with the
instruction manual, it may cause interference to radio
communications.
2.1 - CE marking
The machines that carry the CE mark must comply with
the following European directives:
• Pressure equipment directive (PED) 97/23/EC
• Machinery directive 98/37/EC, modified
• Low voltage directive 2006/95/CE
• Electromagnetic compatibility (EMC) 2004/108/EEC
To ensure compliance with the directives, the machines were
designed in conformance with the harmonised standards:
• EN60204-1: Machine safety, electrical equipment for
machines, part 1: general regulations
• EN61000-6-2 and EN61000-6-4: Electromagnetic
compatibility in industrial environments.
These do not apply to 19XRV units - for 19XRV particulars
refer to chapters 8 to 14.
2.2 - Abbreviations and explanations
Frequently used abbreviations in this manual include:
CCM
CCN
CCW
CW
ECW
ECDW
EMS
HGBP
ICVC
I/O
ISM
LCD
LCDW
LCW
LED
OLTA
PIC
RLA
SI
TXV
Chiller Control Module (control of entering/leaving conditions)
Carrier Comfort Network
Counterclockwise
Clockwise
Entering Chilled Water
Entering Condenser Water
Energy Management System
Hot Gas Bypass
Interface Chiller Visual Control (control interface)
Input/Output
Integrated Starter Module
Liquid Crystal Display
Leaving Condenser Water
Leaving Chilled Water
Light-Emitting Diode
Overload Trip Amps
Product Integrated Control (control system)
Rated Load Amps
International System of Units of Measurement
Thermostatic Expansion Valve for oil circuit
The ICVC software version number of your 19XR unit
will be located on the ICVC module.
Information on the unit control is not included in this
manual. Refer to separate controls manual.
All information given on unit-mounted starters refers to
star-delta connected starters. Electronic starters have
separate documentation.
2.3 - Chiller familiarization 19XR
2.3.1 - Chiller information plate
The information plate is located below the control box.
2.3.2 - System components
The components include the cooler and condenser heat
exchangers in separate vessels, motor-compressor, lubrication package, control centre, and motor starter. All connections from pressure vessels have external threads to enable
each component to be pressure tested with a threaded pipe
cap during factory assembly.
2.3.2.1 - Cooler
This heat exchanger (also known as the evaporator) is
located underneath the compressor. It is maintained at
lower temperature/pressure so that evaporating refrigerant
can remove heat from water flowing through its internal
tubes.
2.3.2.2 - Condenser
The condenser operates at a higher temperature/pressure
than the cooler and has water flowing through its internal
tubes in order to remove heat from the refrigerant.
2.3.2.3 - Motor-compressor
This component maintains system temperature/pressure
differences and moves the heat carrying refrigerant from
the cooler to the condenser.
2.3.2.4 - Control equipment
This includes circuits and automatic controls designed to
control and manage the unit, in order to adjust the capacity
as required to maintain proper leaving chilled water
temperature. It includes the following functions:
• Capture of sensor signals in the machine: pressures,
temperatures, status returns etc.
• Machine actuator control.
• Man-machine interface to read status parameters,
configuration parameters etc.
• Remote unit control and status reporting: via
dedicated signals or by bus (CCN).
The control equipment can be installed in a dedicated box
or integrated in the starter cabinet.
2.3.2.5 - Power equipment
Standard 19XR units include circuits and devices designed
to ensure lubrication.
19XR unit options
An electronic starter allows start-up and compressor motor
power supply interruption. It is factory-installed in the unit
in a cabinet that also includes the control equipment and
the protection and power transmission elements.
Standard equipment for 19XRV units
A variable-frequency drive allows start-up and compressor
motor power supply interruption. It also allows adjustment
of the compressor speed based on the required capacity. It
is factory-installed in the unit in a cabinet that also includes
the control equipment and the protection and power
transmission elements.
2.3.2.6 - 19XR Storage vessel (optional)
There are two sizes of storage vessel available. The vessels
have relief valves, a drain valve and a male flare vapour
connection for the pumpout unit.
NOTE: If a storage vessel is not used at the jobsite, factoryinstalled isolation valves on the chiller may be used to
isolate the chiller charge in either the cooler or condenser.
In this case a separate pumpout unit is used.
Fig. 1 - Model number nomenclature
(unit reference given an an example)
Service number: 19XR_50 52 4V6 LFH 52
Unit designation
19XR or 19XV (19XRV)
Cooler size
- 6 sizes
- 3 lengths
Condenser size
- 6 sizes
- 3 lengths
Model: 19XR_ 50 52 --- 001--EE--
Motor voltage code
Motor efficiency code
S: Standard
H: High-efficiency
Motor code
Unit designation
19XR/19XV
Unit produced in Montuel
Cooler size
- 6 sizes
- 3 lengths
Condenser size
- 6 sizes
- 3 lengths
Chronological number
Compressor code
- 4 sizes (2-3-4-5)
11
Fig. 2 - 19XR machine components
1
3
2
8
15
16
33
18
19
17
4
32
5
20
14
6
21
13 12
11
31
10
9
7
Front view
1. Guide vane actuator
2. Suction elbow
3. Compressor
4. Cooler valve*
5. Cooler pressure transducer
6. Condenser in/out temperature thermistors
7. Cooler in/out temperature thermistors
8. Machine identification nameplate (situated on the starter cabinet side) - see
right-hand figure 'Rear view'
9. Refrigerant charging valve
10. Typical flange connections
11. Oil drain valve
12. Oil level sight glass
13. Refrigerant oil cooler (hidden)
14. Branch circuit control box
*
One relief valve is standard. The optional dual relief valves include
change-over for each heat exchanger.
30
29
28
27
26 25
24 23
22
Rear view
15. Condenser auto reset relief valves*
16. Circuit breaker/disconnect switch
17. ICVC
18. Unit-mounted starter (19XR) or variable-frequency drive (19XRV)
19. Motor sight glass
20. Cooler return-end waterbox cover
21. Cooler nameplate
22. Condenser nameplate
23. Typical waterbox drain port
24. Condenser return-end waterbox cover
25. Refrigerant moisture/flow indicator
26. Refrigerant filter/drier
27. Liquid line isolation valve (optional)
28. Linear float valve chamber
29. Vessel take-apart connector
30. Discharge isolation valve (optional)
31. Pumpout valve
32. Condenser pressure transducer
NOTE: Non-certified drawings. Refer to the certified dimensional drawings supplied with the unit or available on request, when designing an installation.
2.3.3 - Refrigeration cycle
The compressor continuously draws refrigerant vapour
from the cooler at a rate set by the amount of guide vane
opening. As the compressor suction reduces the pressure in
the cooler, the remaining refrigerant evaporates at a fairly
low temperature (typically 3 to 6°C). The energy required
for evaporation is obtained from the water flowing through
the cooler tubes. With heat energy removed, the water
becomes cold enough for use in an air conditioning circuit or
process liquid cooling, light industrial or marine applications.
After taking heat from the water, the refrigerant vapour is
accelerated in a turbine. This increases its pressure by
increasing the speed. Compression adds still more heat
energy, and the refrigerant is quite warm (typically 37 to
40°C) when it is discharged from the compressor into the
condenser.
Relatively cool (typically 18 to 32°C) water flowing into
the condenser tubes removes heat from the refrigerant and
the vapour condenses to liquid.
The liquid refrigerant passes through orifices into the FLASC
(Flash Subcooler) chamber (see Fig. 3 - “Typical 19XR unit
diagram”).
12
Since the FLASC chamber is at a lower pressure, part of
the liquid refrigerant flashes to vapour, thereby cooling the
remaining liquid.
The FLASC vapour is recondensed on the tubes which are
cooled by entering condenser water. The liquid drains into
a float chamber between the FLASC chamber and cooler.
Here a float valve forms a liquid seal to keep FLASC
chamber vapour from entering the cooler.
When liquid refrigerant passes through the valve, some of
it flashes to vapour in the reduced pressure on the cooler
side. In flashing, it removes heat from the remaining liquid.
The refrigerant is now at a temperature and pressure at
which the cycle began.
NOTE: In the 19XRV units a modification has been
introduced in the refrigerant circuit to ensure cooling of
the variable-frequency drive that supplies the compressor.
For 19XRV particulars refer to chapters 8 to 14.
Fig. 3 - Typical 19XR unit diagram
(for 19XRV particulars refer to Fig. 48)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
FLASC chamber
Condenser water
Condenser
Condenser isolation valve
Transmission
Diffuser
Guide vane motor
Motor
Guide vanes
Impeller
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Compressor
Back pressure orifice
Oil cooling
Oil filter
Oil pump
Stator
Rotor
Refrigerant cooling isolation valve
Float valve chamber
Filter drier
2.3.4 - Motor/oil refrigeration cooling cycle
The motor and the lubricating oil are cooled by liquid
refrigerant taken from the bottom of the condenser vessel
(see Fig. 3 - “Typical 19XR unit diagram”).
Flow of refrigerant is maintained by the pressure differential
that exists due to compressor operation. After the refrigerant
flows past a filtration system, a filter, and a sight glass/
moisture indicator, the flow is split between motor cooling
and oil cooling systems.
Flow to the motor flows through an orifice and into the
motor. Once past the orifice, the refrigerant is directed
over the motor by a spray nozzle. The refrigerant collects
in the bottom of the motor casing and then is drained back
into the cooler through the motor refrigerant drain line.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
Orificed fitting
Moisture/flow indicator
Orificed fitting
Thermostatic expansion valves (TXV)
Distribution pipe
Cooler isolation valve
Evaporator
Chilled water
Refrigerant liquid
Refrigerant vapour
Refrigerant liquid/vapour
If the temperature exceeds the authorised threshold, a
priority command limits the unit capacity control. If the
temperature exceeds the threshold of 5.5°C, the guide
vanes are closed. If the temperature rises above the safety
limit, the compressor will shut down.
Refrigerant that flows to the oil cooling system is regulated
by thermostatic expansion valves (TXVs). The TXVs
regulate flow into the oil/refrigerant plate and frame-type
heat exchanger. The expansion valve bulbs control oil
temperature to the bearings. The refrigerant leaving the
heat exchanger then returns to the cooler.
A check valve in this line maintains a higher pressure in
the motor shell than in the cooler/oil sump. The motor is
protected by a temperature sensor imbedded in the stator
windings.
13
Fig. 4 - Lubrication system
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Rear motor bearing
Forward motor bearing
Labyrinth gas line
Oil supply to forward high speed bearing
Isolation valve
Filter
Sight glass
Isolation valve
Check valve
Filter
Eductor
Oil heater
Oil pump
Oil motor
Oil cooler
Isolation valve
Pressure transducer
TXV bulb
Motor cooling line
2.3.5 - Lubrication cycle
2.3.5.1 - Summary
The oil pump, oil filter, and oil cooler make up a package
located partially in the transmission casting of the compressor-motor assembly. The oil is pumped into a filter assembly
to remove foreign particles and is then forced into an oil
cooler heat exchanger where the oil is cooled to proper
operational temperatures. After the oil cooler, part of the
flow is directed to the gears and the high speed shaft bearings;
the remaining flow is directed to the motor shaft bearings.
Oil drains into the transmission oil sump to complete the
cycle (see Fig. 4 - “Lubrication system”).
2.3.5.2 - Details
Oil is charged into the lubrication system through a hand
valve. Two sight glasses in the oil reservoir permit oil level
observation. Normal oil level is between the middle of the
upper sight glass and the top of the lower sight glass when
the compressor is shut down. The oil level should be visible
in at least one of the 2 sight glasses during operation.
Oil sump temperature is displayed on the ICVC default
screen. Oil sump temperature ranges during compressor
operation between 52 to 66°C. The oil pump suction is fed
from the oil reservoir. An oil pressure relief valve maintains
124 to 172 kPa differential pressure in the system at the
pump discharge. This differential pressure can be read
directly from the ICVC default screen.
The oil pump discharges oil to the oil filter assembly. This
filter can be closed to permit removal of the filter without
draining the entire oil system. The oil is then piped to the
oil cooler. This heat exchanger uses refrigerant from the
condenser as the coolant. The refrigerant cools the oil to a
temperature between 49°C and 60°C.
14
As the oil leaves the oil cooler, it passes the oil pressure
transducer and the thermal bulb for the refrigerant expansion valve on the oil cooler. The oil is then divided, with a
portion flowing to the thrust bearing, forward pinion bearing,
and gear spray. The balance then lubricates the motor shaft
bearings and the rear pinion bearing. The oil temperature
is measured as the oil leaves the thrust and forward journal
bearings within the bearing housing. The oil then drains into
the oil reservoir at the base of the compressor. The PIC
(Product Integrated Control) measures the temperature of
the oil in the sump and maintains the temperature during
shut-down. This temperature is read on the ICVC default
screen.
During the chiller start-up, the PIC will energize the oil pump
and provide 15 seconds of prelubrication to the bearings
after pressure is verified before starting the compressor.
During shut down, the oil pump will run for 60 seconds to
post-lubricate after the compressor shuts down. The oil
pump can also be energized for testing purposes in the
Control Test.
Ramp loading can slow the rate of guide vane opening to
minimize oil foaming at start-up. If the guide vanes open
quickly, the sudden drop in suction pressure can cause the
expansion/vaporisation of the refrigerant in the oil. The
resulting oil foam cannot be pumped efficiently; therefore,
oil pressure falls off and lubrication is poor. If oil pressure
falls below 103 kPa differential, the PIC will shut down the
compressor.
After a power cut of over three hours to the PIC control
the oil pump will be energized periodically when the power is
restored. This helps to eliminate refrigerant that has migrated
to the oil sump during the power failure. The controls will
energize the pump for 60 seconds every 30 minutes until
the chiller is started.
Oil reclaim system
The oil reclaim system returns oil lost from the compressor
housing back to the oil reservoir by recovering the oil from
two areas on the chiller. The guide vane housing is the
primary area of recovery. Oil is also recovered by skimming
it from the operating refrigerant level in the cooler vessel.
3 - INSTALLATION
3.1 - Introduction
The 19XR/19XRV machines are factory assembled, wired,
leak tested and electrically tested. Installation (not by
Carrier) consists primarily of establishing water and electrical
services to the machine. The rigging, installation, field
wiring, field piping, and insulation of waterbox covers are
the responsibilty of the contractor and/or customer.
3.2 - Receiving the machine
3.2.1 - Inspect the product delivered
2.3.5.3 - Primary oil recovery mode
Oil is normally recovered at the guide vane housing on the
chiller, as it separates from the refrigerant forming drops
that accumulate at the bottom of the guide vane housing.
It is then returned into the oil reservoir, using a venturi.
CAUTION: Do not open any valves or loosen any connections. The standard 19XR machine is shipped with a full
refrigerant charge. Some machines may be shipped with a
nitrogen holding charge as an option.
2.3.5.4 - Secondary oil recovery method
At part-load conditions the refrigerant velocity is insufficient
for the primary mode. The oil collects in a greater concentration at the cooler surface. This oil and refrigerant mixture
is skimmed in the cooler and taken from the side of the
cooler to the oil heater under the guide vanes.
Inspect for shipping damage while machine is still on
shipping conveyance. If machine appears to be damaged or
has been torn loose from its anchorage, have it examined by
transportation inspectors before removal. Forward claim
papers directly to transportation company. Manufacturer
is not responsible for any damage incurred in transit.
Because the guide vane housing pressure is much lower than
the cooler pressure, the refrigerant evaporates, leaving the oil
behind to be collected by the primary oil recovery method.
•
2.3.6 - Control equipment
This is integrated in the unit-mounted cabinet. It ensures
the operation of the PIC command and mainly includes:
• the built-in control circuit transformer
• the CCM module
• the ICVC control screen
• the electrical short-circuit protections.
2.3.7 - Power circuit equipment
The standard power circuit equipment for the power supply,
protection and lubrication circuit command is integrated
in the same cabinet as the control circuit equipment. It
mainly includes:
• the pump and heater converter contactors.
• the electrical short-circuit protections.
The compressor control and protection module (ISM) is
also supplied. It controls the compressor start-up and shutdown, as well as electric and non-electric protections:
• Current draw monitoring: overcharge, imbalance, leak
current.
• Voltage monitoring: phase order, imbalance, over/
under voltage, micro-cutouts etc.
NOTE: For low-voltage 19XR machines the compressor
control and supply are available as an option:
• Option 25a: compressor start-up via electronic starter
• Option 25b: compressor start-up via star/delta starter
with closed transition.
•
Confirm that the unit received is the one ordered.
Compare the name plate data with the order.
The unit name plate must include the following
information:
1. Version number
2. Model number
3. CE marking
4. Serial number
5. Year of manufacture and test date
6. Refrigerant used and refrigerant class
7. Refrigerant charge per circuit
8. Containment fluid to be used
9. PS: Min./max. allowable pressure (high and low
pressure side)
10. TS: Min./max. allowable temperature (high and
low pressure side)
11. Globe valve cut-out pressure
12. Pressure switch cut-out pressure
13. Unit leak test pressure
14. Voltage, frequency, number of phases
15. Maximum current drawn
16. Maximum power input
17. Unit net weight
PS (see point 9 in the list above)
TS (see point 10 in the list
above)
Pressure switch cut-out pressure
Valve cut-out pressure
Test pressure, unit leak test
kPa
°C
High pressure
Min.
Max.
-90
1250
-20
48
Low pressure
Min.
Max.
-90
1250
-20
48
kPa
kPa
kPa
1100
1250
1000
1250
-
-
-
-
For 19XRV machines the power cabinet supplied as
standard for compressor control and supply is installed on
the unit. For 19XRV particulars refer to chapters 8 to 14.
15
Check all items against shipping list. Immediately notify
the nearest Carrier representative if any item is missing.
To prevent loss or damage (standard EN 378-2 11.22 k,
annex A and B), leave all parts in original packages until
beginning installation. All openings are closed with
covers or plugs to prevent dirt and debris from entering
machine components during shipping. A full operating
oil charge is placed in the oil sump before shipment.
3.2.2 - Provide machine protection
Protect machine from construction dirt and moisture.
Keep protective shipping covers in place until machine is
ready for installation. Do not keep the 19XR units outside
where they are exposed to the weather.
If machine is exposed to freezing temperatures after water
circuits have been installed, open waterbox drains and
remove all water from cooler and condenser. Leave drains
open until system is filled.
3.3 - Rigging the machine and dimensional information
The 19XR machine can be rigged as an entire assembly. It
also has flanged connections that allow the compressor,
cooler, and condenser sections to be separated and rigged
individually.
3.3.1 - Rigging the complete machine
See rigging instructions on label attached to machine. Lift
machine only from the points indicated in the instructions
supplied and in the machine rigging drawings. Each lifting
cable or chain must be capable of supporting the entire
weight of the machine.
WARNING: Lifting machine from points other than
those specified may result in serious damage to the unit
and personal injury. Rigging equipment and procedures
must be adequate for machine weight. See table in Fig. 5
for the machine weights.
IMPORTANT: Make sure that rigging cable is over the
rigging bar before lifting.
Fig. 5 - Machine rigging guide
Dimensions in mm
1. Starter cabinet (option)
2. Docking
3. Minimum height above floor: 4570 ≼
D Chain D (see note 2)
E Chain E (see note 2)
F Chain F (see note 2)
Notes:
1. Each chain must be capable of supporting the entire weight of the chiller. The
maximum weight of each chiller is listed in the table below.
2. Chain lengths shown are typical for 4570 mm lifting height. Some minor
adjustment may be required.
2
16
Machine code Compressor size
Maximum weight, kg
Length, ft (m)
70-72
75-77
80-82
85-87
70-72
75-77
20684
22407
24900
26444
18330
20053
14 (4.3)
16 (4.9)
14 (4.3)
16 (4.9)
14 (4.3)
16 (4.9)
5
5
5
5
4
4
≼ 6400
Dimensions, mm
A
B
1870
1060
2115
1069
1870
1060
2115
1069
1990
1021
2250
1041
C
1090
1070
1090
1070
1041
1041
Chain length, mm
D
E
3500
3790
3640
4030
3500
3790
3640
4030
3500
3790
3640
4030
F
3900
4130
3900
4130
3900
4130
3.3.2 - Rig machine components
If the unit is disassembled for rigging, the weight of each
machine element must be known: motor, compressor, heat
exchangers with and without refrigerant charges, electrical
equipment, special waterboxes, isolation valves, etc. This
information is available on the dimensional drawing supplied
with the machine.
Follow the instructions given below and refer to the views
of the unit and Figs. 7 to 10.
IMPORTANT: Only a qualified service technician should
perform this operation.
3.3.3 - Physical data and dimensions
3.3.3.1 - Standard operating machine weights without power
circuit equipment and without starter cabinet (19XR)
Compressor
chassis No.
3
4
WARNING: Do not attempt to disconnect flanges while
the machine is under pressure. Failure to relieve pressure
can result in personal injury or damage to the unit.
CAUTION: Before rigging the compressor, disconnect all
wires entering the control box.
NOTE: If the cooler and condenser vessels must be
separated, the heat exchangers should be kept level by
placing a support plate under the tube sheets. The support
plate will also help to keep the vessels level and aligned
when the vessels are bolted back together.
NOTE: Wiring must also be disconnected. Label each
wire before removal (see Carrier Certified Prints). In
order to disconnect the starter from the machine, remove
wiring for the oil pump, oil heater, control wiring at the
control box, and the main motor leads at the starter lugs.
5
*
Heat
Without starter cabinet
exchanger A*
B*
reference kg
kg
30-32
2653
1338
35-37
2789
1610
40-42
3175
1973
45-47
3356
2177
50-52
3583
2358
55-57
3788
2608
40-42
3583
1973
45-47
3764
2177
50-52
3991
2358
55-57
4195
2608
60-62
4354
2698
65-67
4603
2971
70-72
5715
4172
70-72
6395
4218
75-77
6757
4626
80-82
7483
4989
85-87
7891
5420
C*
kg
2517
2653
3038
3220
3447
3651
3447
3628
3855
4059
4218
4467
5578
7256
7619
8345
8753
D*
kg
1701
1973
2336
2540
2721
2970
2336
2540
2721
2970
3061
3333
4535
4127
4535
4898
5329
See Fig. 6
A = Right-hand foot, evaporator
B = Right-hand rear foot, condenser
C = Left-hand foot, evaporator
D = Left-hand rear foot, condenser
NOTE: Weights are approximate and include the weight of the refrigerant, water,
nozzle-in-head waterboxes and the thickest pipes.
For the 19XRV machines the weight of the power
equipment must be added to the net machine weights please refer to chapter 17.3.
Remove all transducer and sensor wires at the sensor.
Clip all wire ties necessary to pull heat exchangers apart.
Fig. 6 . Reference diagram, machine operating weights (without starter equipment)
Starter cabinet (option)
A = Right-hand foot, evaporator
B = Right-hand rear foot, condenser
C = Left-hand foot, evaporator
D = Left-hand rear foot, condenser
17
Fig. 7 - 19XR Cooler side view
1.
2.
3.
4.
5.
6.
7.
Hot gas bypass (cut)
Compressor suction elbow (unbolt)
Oil reclaim line
Starter connector (unbolt)
Heat exchanger assembly (unbolt)
Tube sheet
Refrigerant motor cooling line (cut)
8.
9.
10.
A
B
C
Motor drain
Compressor mounting (unbolt)
Cooler liquid feed line
Condenser
Cooler
Compressor
Fig. 8 - 19XR Chiller top view
1.
2.
3.
4.
18
Guide vane motor
Branch circuit control box
Compressor discharge elbow joints
Condenser transducer cable
Fig. 9 - 19XR Compressor detail
1.
2.
3.
4.
Motor temperature sensor cable
Bearing temperature sensor cable connection (inside box)
Compressor oil sump pressure cable
Compressor oil sump temperature sensor cable
5.
6.
7.
Compressor oil discharge pressure cable
Discharge temperature sensor cable
Connection for high pressurestat (DBK/SDBK)
Fig. 10 - 19XR Rear view
12
1
2
11
3
4
10
5
9
8
6
7
1.
2.
3.
4.
5.
6.
Guide vane motor cable
Diffuser motor (only XR5 compressor)
Condenser leaving water pressure cable
Condenser leaving water temperature cable
Condenser entering water temperature cable
Condenser entering water pressure cable
7.
8.
9.
10.
11.
12.
Evaporator entering water temperature cable
Evaporator entering water pressure cable
Evaporator leaving water temperature cable
Evaporator leaving water pressure cable
Chiller Visual Control (ICVC)
Guide vane motor
19
3.3.3.2 - Dimensions/clearances
For units with marine waterboxes, please refer to the dimensional drawings supplied with the unit.
Heat exchanger size
19XR
30 to 32
35 to 37
40 to 42
45 to 47
50 to 52
55 to 57
60 to 62
65 to 67
70 to 72
75 to 77
80 to 82
85 to 87
Dimensions (±10 mm)
A (Length with nozzle-in-head waterbox)
2 passes*
1 or 3 passes**
4230
4380
4754
4904
4230
4380
4754
4904
4230
4380
4754
4904
4230
4380
4754
4904
4919
5104
5525
5710
4919
5104
5525
5710
B (Width except 19XRV)
C (Height)***
D
E****
1670
1670
1880
1880
2054
2054
2124
2124
2530
2530
2530
2530
2127
2127
2294
2294
2781
2780
2879
2878
3276
3276
3343
3343
3747
4278
3747
4278
3754
4278
3754
4280
4278
4884
4278
4884
250
250
250
250
250
250
250
250
460
460
460
460
19XRV machines: The width (B) and height (C) dimensions may be modified, if the variable frequency drive is used. Please refer to the relevant chapters.
* Assumes that both cooler and condenser nozzles are on the same end of the chiller.
** 1 or 3 pass length applies, if either (or both) cooler or condenser is a 1 or 3 pass design.
*** Size < 50-52: maximum height shown is for units with starter cabinet
Size ≥ 50-52: maximum height shown is for units with high-voltage terminal box
See dimensional drawings for each unit for more details
**** Clearance for float valve variable depending on the unit height - see Fig. 2 - “19XR Machine components”, item No. 28.
1219 mm
915 mm
Fig. 11 - Dimensional drawing
1.
2.
Motor service space
Recommended clearance above the machine
Clearances required
D. Clearance area for heat exchanger tubes
E. Clearance for float valve, variable depending on the unit
height - see chapter 2.3, Fig. 2 ”19XR Machine
components” - item No. 28.
610
362
mm
mm
NOTE: Non-certified drawings. Refer to the certified dimensional drawings supplied with the unit or available on request, when designing an installation.
20
3.3.3.3 - Maximum and minimum 19XR heat exchanger flow rates (l/s)
Evaporator*
Model
Reference
No.
3
4
5
6
7
8
*
30
31
32
35
36
37
40
41
42
45
46
47
50
51
52
55
56
57
60
61
62
65
66
67
70
71
72
75
76
77
80
81
82
85
86
87
1 pass
Min.
38
46
54
38
46
54
62
70
77
62
70
77
83
93
100
83
93
100
107
115
122
107
115
122
124
140
152
124
140
152
140
174
188
160
174
188
Max.
154
185
215
154
185
215
249
281
307
249
281
307
332
374
400
332
374
400
429
462
488
429
462
488
496
560
609
596
560
609
562
695
752
639
695
752
2 passes
Min.
Max.
19
77
23
92
27
108
19
77
23
92
27
108
31
125
35
140
38
154
31
125
35
140
38
154
42
166
47
187
50
200
42
166
47
187
50
200
54
215
58
231
61
244
54
215
58
231
61
244
62
248
70
280
76
305
62
248
70
280
76
305
70
281
87
347
94
376
80
320
87
347
94
376
3 passes
Min.
Max.
13
51
15
62
18
72
13
51
15
62
18
72
21
83
23
93
26
112
21
93
23
93
26
112
28
111
31
125
33
133
28
111
31
125
33
133
36
143
38
154
41
163
36
143
38
154
41
163
41
165
47
187
51
203
41
165
47
187
51
203
47
187
58
232
63
251
53
213
58
232
63
251
Condenser*
Model
Reference 1 pass
No.
Min.
3
30
41
31
50
32
59
35
41
36
50
37
59
4
40
69
41
78
42
86
45
69
46
78
47
86
5
50
95
51
104
52
112
55
95
56
104
57
112
6
60
121
61
130
62
138
65
121
66
130
67
138
7
70
146
71
163
72
178
75
146
76
163
77
178
8
80
185
81
202
82
219
85
185
86
202
87
219
Max.
163
199
235
163
199
235
277
312
346
277
312
346
380
416
450
380
416
450
484
519
554
484
519
554
583
650
713
583
650
713
740
807
874
740
807
874
2 passes
Min.
Max.
20
81
25
100
29
118
20
81
25
100
29
118
35
138
39
156
43
173
35
138
39
156
43
173
48
190
52
208
56
225
48
190
52
208
56
225
61
242
65
260
69
277
61
242
65
260
69
277
73
291
81
325
89
356
73
291
81
325
89
356
92
370
101
404
109
437
92
370
101
404
109
437
3 passes
Min.
Max.
14
54
17
67
20
79
14
54
17
67
20
79
23
92
26
104
29
115
23
92
26
104
29
115
32
127
35
138
37
150
32
127
35
138
37
150
40
161
43
173
46
185
40
161
43
173
46
185
49
194
54
217
59
238
49
194
54
217
69
238
62
247
67
269
73
291
62
247
67
269
73
291
Flow rates based on standard tubes in the cooler and condenser.
Minimum flow based on tube velocity of 0,91 m/s (3 ft/s).
Maximum flow based on tube velocity of 3.66 m/s (12 ft/s).
21
3.4 - Install machine supports
In order to provide adequate, long-lasting support for the
unit, it is essential to choose the right grout and to apply it
properly. Carrier advise using an epoxy-type, pre-mixed,
non-shrinking grout only. Follow the manufacturer’s
instructions for applying the grout.
• Check the unit layout plans to determine the required
grout thickness.
• Apply wax to the jacking screws to facilitate subsequent
removal from the grout.
• The grout must be applied up to the top of the base of
the spring isolator, and there must be no gap in the
grout below the spring isolators.
• Allow the grout to dry and set in accordance with the
manufacturer’s instructions before starting up the unit.
• Remove the jacking screws from the soleplates once
the grout has set.
Typical applications of these units are in refrigeration
systems, and they do not require earthquake resistance.
Earthquake resistance has not been verified.
3.4.1 - Install standard isolation
Figs. 12 and 13 show the position of support plates and
shear flex pads which together form the standard machine
support system.
3.4.2 - Installation of a levelling accessory (if necessary)
Where a floor surface is irregular or uneven, it may prove
necessary to use accessory spring isolators (supplied by
Carrier for field installation) and levelling pads. See Figs.
14 and 15.
Fig. 12 - Standard isolation
Place the unit levelly, using the spring isolator jacking
screws. Use a level at least 600 mm long.
Level base line
1.
2.
Machine foot
Support plate
Shear flex pad
Note: The isolation package includes four shear flex pads.
Fig. 13 - 19XR Chiller footprint
2
3
1
22
1.
2.
3.
Soleplate detail
Condenser
Evaporator
Heat exchanger model
30-32
35-37
40-42
45-47
50-52
55-57
60-62
65-67
70-72
75-77
80-82
85-87
Evaporator/condenser , mm
A
B
4001
1670
4525
1670
4001
1880
4525
1880
4001
1994
4525
1994
4001
2096
4525
2096
4620
2426
5229
2426
4620
2711
5229
2711
3.4.3 - Install spring isolation
Spring isolation may be purchased as an accessory from
Carrier for field installation. It may also be field supplied
and installed.
Obtain specific details on spring mounting and machine
weight distribution from job data. Also, check job data for
methods to support and isolate pipes that are attached to
spring isolated machines.
Spring isolators may be placed directly under machine
support plates or located under machine soleplates. See
Fig. 15 - “19XR Spring isolation”.
Fig. 14 - Levelling accessory for 19XR units
1.
2.
3.
4.
Machine foot (side view)
System base (concrete)
Anti-vibration platform
Soleplate
Adjusting pads
Adjusting screws
Note: Accessory (Carrier supplied, field-installed) soleplate package includes 4
anti-vibration platforms/soleplates, 16 adjusting screws and levelling pads.
Thickness of grout will vary, depending on the amount necessary to level chiller.
Use only pre-mixed non-shrinking grout. Celcote HT-648 or Master Builders 636,
38 to 57 mm thick.
Fig. 15 - 19XR Spring isolation
1.
2.
3.
4.
5.
Accessory spring isolator
Soleplate (accessory) attaches securely to isolator
Level foundation
Resilient shear flex pad, bonded to top and bottom of spring mount
Support plate
23
3.5 - Connection of water piping
For size and position of the heat exchanger water inlet and
outlet connections refer to the certified dimensional
drawings supplied with the unit. See. Fig. 17 - “Standard
waterboxes and nozzle arrangements”
2.
3.
4.
The water pipes must not transmit any radial or axial force
nor any vibration to the heat exchangers.
The water supply must be analysed and appropriate filtering,
treatment, control devices, isolation and bleed valves and
circuits built in, to prevent corrosion, fouling and deterioration of the pump fittings. Consult either a water treatment
specialist or appropriate literature on the subject.
5.
6.
Provide openings in water piping for required pressure
gauges and thermometers. For thorough mixing and
temperature stabilization, wells in the leaving water
pipe should extend inside pipe at least 50 mm.
Install air vents at all high points in piping to remove
air and prevent water hammer.
Install pipe hangers where needed. Make sure no weight
or stress is placed on waterbox pipes or flanges.
Use flexible connections to reduce the transmission of
vibrations.
Water flow direction must be as specified in Fig. 16.
NOTE: The water outlet is always the upper nozzle for
cooler or condenser.
7.
3.5.1 - Install water piping to heat exchanger
Install piping using job data, piping drawings, and procedures
outlined below. A typical piping installation is shown in
Fig. 16 - “Typical nozzle piping”.
CAUTION: Factory-supplied insulation is not flammable
but can be damaged by welding sparks and open flame.
Protect insulation with a wet canvas cover.
Water flow switches must be of vapour-tight construction and must be installed on top of pipe in a horizontal
run and at least 5 pipe diameters from any bend.
8. Install waterbox vent and drain piping in accordance
with individual job data. All connections are 3/4 -in. FPT.
9. Install waterbox drain plugs in the unused waterbox
drains and vent openings.
10. Install optional pumpout system or pumpout system
and storage tank. Please refer to Figs. 18 and 19.
Remove chilled and condenser water sensors and probes
before welding connecting piping to the connections. Refer
to Fig. 10 - “19XR Rear view”. Replace sensors and probes
after welding is complete.
1.
Offset pipe flanges to permit removal of waterbox
cover for maintenance and to provide clearance for
pipe cleaning. No flanges are necessary with marine
waterbox option; however, water piping should not
cross in front of the waterbox or access will be blocked.
Fig. 16 - Typical nozzle piping (not supplied by Carrier)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Air vent
Leaving condenser water
Entering condenser water
Isolation valve
Pressure gauges
Thermometer openings (optional)
Pipe hangers
Entering chilled water
Leaving chilled water
Water drain
NOTE: Non-certified drawings. Refer to the certified dimensional drawings supplied with the unit or available on request, when designing an installation.
24
Fig. 17 - Standard waterboxes and nozzle arrangements (19XR)
Nozzle arrangements - nozzle-in-head waterboxes (19XR)
Frames 3 -4 - 5 - 6 (see table below)
W
X
Y
Z
Drive end
Compressor end
Condenser
Evaporator
Frames 7 - 8 (see table below)
NOTE: Non-certified drawings. Refer to the certified dimensional drawings supplied with the unit or available on request, when designing an installation.
Nozzle arrangement codes for all standard nozzle-in-head waterboxes
Number of passes
Evaporator waterbox
Inlet
Outlet
1
2
3
*
Arrangement code*
Condenser waterbox
Inlet
Outlet
Arrangement code*
A
P
B
Q
C
R
D
S
E
T
F
U
Refer to certified drawings
ATTENTION: For marine waterboxes, please refer to the dimensional drawings supplied with the machine.
25
Fig. 18 - Optional pumpout system piping schematic with storage tank
1a.
1b.
2.
3.
4.
5.
6.
7.
8.
10.
11.
12.
Safety valve on machine
Safety valve on machine
Service valve on pumpout unit
Service valve on pumpout unit
Service valve on pumpout unit
Service valve on pumpout unit
Storage tank vent
Machine charging valve
Compressor discharge valve
Refrigerant charging valve
Cooler isolation valve
Condenser isolation valve
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
Refrigerant cooling valve
Optional hot gas isolation valve
Hot gas bypass solenoid valve
Linear float
Condenser
Cooler
Storage tank
Tee for charging
Compressor discharge valve
Compressor suction valve
Pumpout compressor
Oil separator
25.
26.
A
B
C
Condenser water supply and return
Pumpout condenser
Service valve on pumpout unit
Service valve on machine
Maintain at least 610 mm clearance around storage tank for
service and operation work
Fig. 19 - Pumpout system piping schematic without storage tank
1a.
1b.
2.
3.
4.
5.
7.
8.
26
Service valve on machine
Service valve on machine
Service valve on pumpout unit
Service valve on pumpout unit
Service valve on pumpout unit
Service valve on pumpout unit
Machine charging valve
Compressor discharge valve
11.
12.
13.
14.
15.
16.
17.
18.
Cooler isolation valve
Condenser isolation valve
Refrigerant cooling valve
Optional hot gas isolation valve
Hot gas bypass solenoid valve
Linear float
Condenser
Evaporator
19.
20.
21.
22.
23.
24.
A
B
Compressor discharge valve
Compressor suction valve
Pumpout compressor
Oil separator
Condenser water supply and return
Pumpout condenser
Service valve on pumpout unit
Service valve on machine
3.5.2 - Install vent piping to relief devices
The 19XR chiller is factory equipped with relief devices on
the cooler and condenser shells. Refer to Fig. 20 - “Relief
device locations” for size and location of relief devices.
The safety valves are installed on ball valves, that are
lead-sealed in the open position. These valves permit
isolating and removing the safety valve for calibration and
replacement.
If a safety valve is replaced, do not leave the machine
without safety valves. Only remove the safety valve, if the
risk of fire is completely controlled and under the responsibility of the user. Only one safety valve at a time must be
removed and replaced so that fire protection is maintained
during this operation. Please refer to chapter 1 - “Safety
considerations”.
Vent relief devices to the outdoors in accordance with the
applicable national standard (for example, NFE 35400 in
France and EN 378 when applicable) for the safety of
chilling devices as well as any other applicable codes.
DANGER: Refrigerant discharged into confined spaces
can displace oxygen and cause asphyxiation.
• If relief devices are manifolded, the cross-sectional
area of the relief pipe must at least equal the sum of
the areas required for individual relief pipes.
• Provide a pipe plug near outlet side of each relief
device for leak testing. Provide pipe fittings that allow
vent piping to be disconnected periodically for
inspection of valve mechanism.
• Piping connected to relief devices must not apply
stress to the device. Adequately support piping. A
length of flexible tubing or piping near the device is
essential on spring-isolated machines.
• Cover the outdoor vent with a rain cap and place a
condensation drain at the low point in the vent piping
to prevent water build-up on the atmospheric side of
the relief device.
• Equip the piping with connections to allow disconnection of the piping for inspection.
Fig. 20 - Relief device locations
3.6 - Make electrical connections
The wiring diagrams in this manual (see Fig. 24 - “COMM 1
CCN communication wiring for multiple chillers”) are only
for illustration and should not be used instead of the
project-specific wiring diagrams.
Details for the wires and cables inside the factory-mounted
control boxes: Except for the compressor power supply
cables, the insulation is generally of the 05VK or 07VK type.
The wire colours are generally as follows: red, black and
white for the 3 bus wires, red for all the common 24, 115,
230 VAC wires, orange for all the wires of the excluded
circuits, blue for the DC circuits, brown for all the other
wires.
WARNING: Do not attempt to start compressor or oil
pump (even for a rotation check) or apply test voltage of
any kind while machine is under dehydration vacuum.
Motor insulation breakdown and serious damage may
result.
Connect control inputs. For details about the remote control
wiring refer to the chapter for the relevant starter type
used.
3.6.1 - Installation standards and precautions
The field wiring must comply with all relevant electrical
regulations that apply at the installation site (see "Electrical
data notes"). In France, for example, the requirements of
standard NFC 15100, among others, must be met.
IMPORTANT: If particular aspects of an installation
require different characteristics from those listed above
(or not mentioned), contact your local Carrier office.
3.6.2 - Electrical characteristics of the motors
NOTE: For 60 Hz units contact Carrier.
The installer is responsible for the installation arrangement
of the machine power supply.
This must be defined using the data supplied on the
specific machine selection sheet.
Start-up current**
Across-the-line start
Start/delta start (Y/Δ)
Electronic starter
Machine with variable
frequency drice (19XRV)
*
**
Motor LRDA*
Motor LRYA*
3*Motor RLA*
N/A
Maximum continuous
operating current
Motor OLTA*
Motor OLTA*
Motor OLTA*
Chiller rated line current*
Value given on the specific machine selection sheet.
The maximum start-up current duration is less than 10 s.
Note: The installation data must comply with any other short-circuit requirements
supplied for the machine.
Other electrical devices to be taken into consideration
1. Nominal current draw of the oil pump =
power kVA x 1000/(√3 x voltage).
2. The crankcase heater only operates when the compressor is off.
3. Power to the crankcase heater control must be on circuits that can provide
continuous service when the compressor is disconnected.
27
3.6.3 - Recommended wire section
The section and number of connectable power supply
cables for the 19XRV machine are given in the specific
chapter on each starter mode (starting with chapter 8).
3.6.4.2 - Communication wiring
The standard external communication protocol is CCN. A
JBus/ModBus communications board is available as an
option.
IMPORTANT: Before connection of the main power cables
(L1 - L2 - L3) on the terminal block, it is imperative to
check the correct order of the 3 phases before proceeding
to the connection on then terminal block or the main
disconnect/isolator switch.
3.6.5 - Make the necessary connections for the outgoing
control signals
Connect the auxiliary equipment, the chilled water pumps
and the condenser water pumps, as well as the additional
alarms, as indicated in the job wiring diagrams.
3.6.4 - External control wiring
3.6.6 - Connect the starting cabinet
The 19XR is available either with a unit-mounted, factoryinstalled starter cabinet (optional), or with a separate,
field-installed starter. See Fig. 21 or 22, depending on the
starter type (unit mounted or separate).
3.6.4.1 - Field control wiring
Refer to the 19XR PIC Controls IOM and the certified
wiring diagram supplied with the unit for the field control
wiring of the following features:
• Evaporator pump interlock (mandatory)
• Remote on/off switch
• Alarm report
• Condenser pump control
• Remote set point reset
• Refrigerant leak detection
• Demand limiter
• Percentage, capacity in operation
• Emergency stop
Electrical data notes and operating conditions
•
•
19XR units have one or two power connection points.
The control box always includes the protection and control elements, as well
as the power circuit for the oil pump and the heaters. As an option or as
standard on the 19XRV machines, the electrical equipment also includes the
start-up and protection elements for the compressor motor.
•
Field connections:
All connections to the system and the electrical installations must be in full
accordance with all applicable codes*.
The Carrier 19XR units are designed and built to ensure conformance with
local codes. The recommendations of European standard EN 60204-1
(corresponds to IEC 60201-1) (machine safety - electrical machine
components - part 1: general regulations) are specifically taken into account,
when designing the electrical equipment.
•
Notes:
• Generally the recommendations of IEC 60364 are accepted as compliance
with the requirements of the installation directives. Conformance with EN
60204-1 is the best means of ensuring compliance with the Machines
Directive and § 1.5.1.
• Annex B of EN 60204 1 describes the electrical characteristics used for the
operation of the machines.
1. The operating environment for the 19XR units is specified below:
Environment* Environment as classified in IEC 60364 § 3:
- ambient temperature range: +5°C to +40°C, class AA4*
- humidity range (non-condensing)*:
50% relative humidity at 40°C
28
3.6.6.1 - Unit-mounted factory-installed starter cabinet
Connect the power leads of the auxiliary equipment,
chilled and condenser water pump as well as the associated
alarms, using the conductor provided. Refer to the wiring
diagram for the installation.
90% relative humidity at 20°C
- altitude: ≤ 2000 m for 19XR machines (≤ 1000 m for 9XRV machines)
- indoor installation
- presence of water: class AD2* (possibility of water droplets)
- presence of hard solids, class AE2* (no significant dust present)
- presence of corrosive and polluting substances, class AF1 (negligible)
- vibration and shock, class AG2, AH2
Competence of personnel, class BA4* (trained personnel - IEC 60364)
2. Power supply frequency variation: ± 2 Hz.
3. The neutral (N) conductor must not be connected directly to the unit (if
necessary use a transformer).
4. Overcurrent protection of the power supply conductors is not provided with the
unit.
5. The factory installed disconnect switch(es)/circuit breaker(s) is (are)
disconnect devices of a type suitable for power interruption in accordance with
EN 60947-3 (corresponds to IEC 60947-3).
6. The units are designed for connection to TN networks (IEC 60364). For IT
networks the earth connection must not be at the network earth. Provide a
local earth, consult competent local organisations to complete the electrical
installation.
Note: If particular aspects of an actual installation do not conform to the conditions
described above, or if there are other conditions which should be considered,
always contact your local Carrier representative.
*
The protection level required to conform to this class is IP21B (according to
reference document IEC 60529). All 19XR units are protected to IP23 and fulfil
this protection condition.They are also protected against accidental and
exceptional non-pressurised water jets.
Fig. 21 - Unit with unit-mounted starter/variable-frequency drive
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Disconnect
Unit mounted starter with control (factory-installed)
Guide vane motor
Oil pump terminal box
Vents
Pressure gauges
Chilled water pump
Condenser water pump
Chilled water pump starter
Condenser water pump starter
IMPORTANT: Ensure correct phasing is followed for
proper motor rotation (clockwise). Do not isolate the
terminals until the wiring has been verified and approved
by the Carrier personnel in charge of the commissioning.
NotE: The oil pump disconnect switch can be placed
near element 2, (separate starter cabinet).
11.
12.
13.
14.
15.
16.
Cooling tower fan starter
To cooling tower
From cooling tower
To load
From load
Drain
Piping
Control wiring
Power wiring
NOTES:
1. Wiring and piping shown are for general point-ofconnection only and are not intended to show details
for a specific installation. Certified field wiring and
dimensional diagrams are available on request.
2. All wiring must comply with applicable codes.
3. Refer to Carrier System Design Manual for details
regarding piping techniques.
4. Wiring not shown for optional devices such as:
• remote start-stop
• remote alarm
• optional safety device
• 4 to 20 mA resets
• optional remote sensors
29
3.6.6.2 - Freestanding, field-installed starter
The starters must be designed and manufactured in
accordance with applicable regulations. Fig. 22 illustrates
the installation principle to be observed.
IMPORTANT: Do not insulate terminals until wiring
arrangement has been checked and approved by Carrier
start-up personnel. Also, make sure correct phasing is
followed for proper motor rotation (clockwise).
Fig. 22 - Unit with separate starter/variable-frequency drive
15
16
18
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
17
Disconnect
Freestanding compressor motor starter/variable frequency drive
Compressor motor terminal box
Oil pump terminal box
Control cabinet
Vents
Pressure gauges
Chilled water pump
Condenser water pump
Chilled water pump starter
Condensing water pump starter
IMPORTANT: Ensure correct phasing is followed for
proper motor rotation (clockwise). Do not isolate the
terminals until the wiring has been verified and approved
by the Carrier personnel in charge of the commissioning.
NotE: The oil pump disconnect switch can be placed
near element 2, (independent starter cabinet).
30
19
12.
13.
14.
15.
16.
17.
18.
19.
Cooling tower fan starter
Disconnect
Circuit breaker
To cooling tower
From cooling tower
To load
From load
Drain
Piping
Control wiring
Power wiring
NOTES:
1. Wiring and piping shown are for general point-ofconnection only and are not intended to show details
for a specific installation. Certified field wiring and
dimensional diagrams are available on request.
2. All wiring must comply with applicable codes.
3. Refer to Carrier System Design Manual for details
regarding piping techniques.
4. Wiring not shown for optional devices such as:
• remote start-stop
• remote alarm
• optional safety device
• 4 to 20 mA resets
• optional remote sensors
3.6.6.3 - High-voltage units
High-voltage units can require special terminal preparation
to prevent moisture condensation and electrical arcing.
Follow electrical codes for high-voltage installation. The use
of vinyl tape is not recommended; a method for high-voltage
devices must be used.
3.6.6.4 - Electrical connection of the starter
The earth of the control equipment and the control box
(starter) must have equipotential.
3.6.6.5 - Control wiring
The transformer that supplies the control equipment is only
provided to supply the auxiliary control installation within
the power reserve limit indicated on the wiring diagram
supplied with the machine.
The communication bus cables and those provided for the
transmission of analogue signals that go to the outside of
the control boxes must be shielded. The shielding must be
connected to the whole cable circumference and both ends.
3.6.6.6 - Wiring between starter and compressor motor
For high-voltage motor wiring please contact the Carrier
factory.
Low-voltage (690 V or less) compressors have six terminal
studs. Depending on the type of starter employed, between
3 and 6 leads must be run between the starter and the motor.
If only 3 leads are used, jumper the terminals as follows: 1 to
6, 2 to 4 and 3 to 5 (see the table in Fig. 23 for the diameter
and distance between terminals).
The terminal studs must not take the weight of the leads:
use intermediate supports. Use a torque spanner to tighten
the terminal nuts to 60 Nm maximum, maintaining the
terminal with an additional spanner.
3.6.7 - Connect the starter cabinet to the control box
Connect the starter cabinet to the unit control box (Fig. 22).
In addition, connect the communication cable (SIO) from
the control box to the ISM board on the power wiring box.
The pressostat and pump operation return signal cables
may cross over between the control boxes.
3.6.8 - Carrier Comfort Network interface (CCN)
The Carrier Comfort Network (CCN) communication bus
wiring is supplied and installed by the electrical contractor. It
consists of shielded, 3-conductor cable with metallic braiding.
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 element on either side of
it. The negative pins must be wired to the negative pins.
The signal ground pins must be wired to the signal ground
pins. See Fig. 24 - “COMM1 CCN communication wiring
for multiple 19XR chillers” for the location of the CCN
network connector on the ICVC (J1) module.
When connecting the CCN communication bus to a system
element, a colour code system for the entire network is
recommended to simplify installation and checkout. The
following colour code is recommended:
Signal type*
+
Ground
-
ICVC connector
1
2
3
CCN Bus conductor insulation colour
Red
White
Black
* Cable type to be used: shielded cable LIYCY
If a cable with a different colour scheme is selected, a similar
colour code should be adopted for the entire network.
Precautions must be taken to protect the signal against
external electromagnetic interference. The recommendations
depend on the installation configuration.
Fig. 23 - Diameter and distance between terminals for the wiring between compressor starter and motor
60 Nm
Motor
size
B
C
D
E
Voltage 690 V or less
Number of A mm
terminals
6
101,5
6
101,5
6
145
6
145
40 Nm
B mm
ø C mm
80
80
122
122
16
16
22,5
22,5
31
•
•
Installations with controlled earth equipotential
If the earth potential difference is small: in general, if
all elements connected to the CCN bus are installed in
the same building and if the distance between the
communicating devices is short:
1. Use of a twisted, unshielded cable is normally
sufficient. If there is a problem created by strong
radiated interference in the air (high frequency):
2. Use of a shielded cable with a 75% minimum
recovery rate can increase the immunity of the
cable to high-frequency radiated interference.
In the first instance the shielding connection is
made at a single point. If the problem persists, the
shielding must also be connected near each device
connected to the bus, on a site plan. In all cases
the shielding connection(s) must guarantee an
electrical link along the complete periphery of
the cable.
Installations with non-controlled earth equipotential
If the machine and the display are located in different
buildings and/or if the distance between the devices is
long (>200 m): a solution can only be established after
an analysis of the installation and its specific
characteristics, and the recommendations below are
only given as basic precautions.
1. Surge absorbers must be installed at both ends of
each cable conductor to prevent the risk of lightning strikes.
2. Locating the closed metallic cable in a conduit, or
even locating it in the ground are good ways of
increasing the immunity of the cable against
radiated interference.
3. The installation of common cores at both ends
increases the immunity against interference. The
ferrites are then installed so that they enclose the
complete cable.
NOTE: The use of a shielded cable can cause problems.
Attention: If there may be a difference in the lowfrequency potential between the local earth connections,
this can lead to a dangerous voltage (> 50 V) between the
display and the local earth. In this case the installation
of the accessory wired connection is not recommended.
To connect the 19XR chiller to the network, proceed as
follows (refer to Fig. 24):
1. Cut power to the PIC control panel.
2. Find connector J1 on the ICVC.
3. Cut a CCN wire and strip the ends of the RED,
WHITE, and BLACK conductors (Molex type
strippable connectors - supplier ref. No. 08-50-0189).
4. Using a wirenut, connect the drain wires together.
5. Insert and secure the RED wire to Terminal 1 of the
J1 connector.
6. Insert and secure the WHITE wire to Terminal 2 of
the J1 connector.
7. Insert and secure the BLACK wire to Terminal 3 of
the J1 connector.
8. Mount a terminal strip in a convenient location.
9. Connect the opposite ends of each conductor to
separate terminals on the terminal strip.
10. Cut another CCN wire and strip the ends of the
conductors.
11. Connect the RED wire to the matching location on
the terminal strip.
12. Connect the WHITE wire to the matching location on
the terminal strip.
13. Connect the BLACK wire to the matching location on
the terminal strip.
3.7 - Install field insulation
See Fig. 25 - "Machine isolation".
CAUTION: Protect insulation from weld heat damage
and weld splatter. Cover with wet canvas cover during
water piping installation.
When installing insulation at the job site, insulate the
following components:
• compressor motor
• cooler shell
• cooler tube sheets
• suction elbow
• motor cooling drain
• oil reclaim piping
• plate heat exchanger refrigerant side tubing
• refrigerant liquid line to cooler
• suction chamber waterbox covers
Fig. 24 - COMM1 CCN communication wiring for multiple 19XR chillers (typical)
0
0
J7
J1
}24 VAC
-
R
J7
CVC
J1
-
J6
+
SERVICE
32
0
R
J7
CVC
J1
J6
+
J6
SERVICE
}24 VAC
-
G
G
J6
}24 VAC
G
J6
+
J6
SERVICE
R
CVC
0.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Alarm
Ground wire
Ground
Black
White
Red
Terminal strip
Chassis ground
Chiller Visual Control ICVC
19XR chillers
Factory-wiring
Field-wiring
Fig. 25 - Machine isolation
A
B
C
Top view
Front view
Rear vew
A
B
C
33
3.8 - Installation of a refrigerant leak detection module
(option 159)
Option 159: Independent refrigerant leak detection system.
3.8.1 - Description
The European directive concerning fluorinated greenhouse
gases (F-gas regulation) now requires that installations with
300 kg or more F-gas must be leak-tested at least every
three months. This applies to 95% of 19XR/19XV units.
To facilitate these periodic maintenance visits, it is recommended to install an independent optional refrigerant leak
detection system on these chillers. This system can either
be factory-installed or added to a machine that is already
installed.
It consists of an electronic module located in the control
box (see Fig. 26), that is conncted to a sensor located between
the two heat exchangers at the middle point of the unit
(see Fig. 27). This sensor is encased and attached to a fixing
bracket mounted between the oil balancing line and its
fixing support (see Fig. 28).
This system permits permanent monitoring of the leaktightness of the points where refrigerant leaks can occur in
the chiller refrigerant circuit. An analogue 4-20 mA signal
from the detection module at input J5-5(-)/J5-6(+) of the
CCM board is available for this purpose.
3.8.2 - Control/operation
The detection threshold corresponds to an assigned 6 mA
current, that is equivalent to a detection of 133 ppm R-134a.
The refrigerant leak alarm is configurable in the options
table on the ICVC. The access is via MENU/SERVICE/
EQUIPMENT SERVICE/SELECT/OPTIONS. The default
value is 20 mA, regulated at 6 mA.
If the sensor detects refrigerant in the air, the refrigerant leak
detection alarm (No. 250) is relayed and displayed on the
ICVC. The system is independent and directly linked to
the chiller operation. The alarm will cause the unit to shut
down. The 4-20 mA input signal can be adjusted by placing
DIP switch 1 of SW2 on the CCM board into the ON
position (see Fig. 29).
3.8.3 - Adding the module to an installed chiller
Carrier offers a referigerant leak detection kit (part number
19XR-509---632--EE-) that can be installed to existing
chillers. This is available from the Spare Parts Department.
The module can be added to any 19XR/19XV machine
with a control interface box or a starter control box. The
installation and wiring instructions are supplied with the kit.
34
The kit consists of the following parts:
Item
Refrigerant leak detection module with sensor and 5 m cable
(19ZX-561---212--EE-)
3 x 0.5 LiYY cable
Three-point KK connector
KK contact
Screw T h M4 lg 12
Screw T h M4 lg 20
Rectifier jumper (50 V, 8 A)
Red wire 0.93 (-5 V)
Brown wire 0.93 (+5 V)
Red wire 0.93 (0 V)
Brown wire 0.93 (24 V)
Pre-insulated red clip (6.35)
Machine connection piece (7 mm long)
DIN rail clips
Detector support panel
Sensor support panel
Installation and wiring instructions
Quantity
1
5
1
3
3
1
1
1,5
1,5
1,5
1,5
4
4
2
1
1
1
Fig. 26 - View of module in the control box
Electronic leak detector module
Fig. 27 - Detector support fixing
Detector support
1.
2.
3.
4.
Clip
Fixing screw
Balancing line
Detector support
Balancing module
components
Fig. 28 - Detector fixing
Refrigerant detection sensor
Fig. 29 - Changing SW2 switch 1
SW2 switch 1 of the CCM board in the “ON” status for the 4-20 mA signal
Fixing of the detector on the support
3.8.4 - Sensor installation
• Remove the clip (item 1) and the screw (item 2) that
hold the balancing line (item 3).
• Place the support supplied with the kit (item 4),
between the welded jumper and the clip that holds the
balancing line and re-attach everything.
• Place the sensor on the support, inserting it into the
recess and tighten it with the plastic collar.
The technical documentation for the leak detection module
is supplied in addition to the standard chiller documentation
that is in the control box. Here you will find information
about module installation, usage precautions and operation,
and a detailled description as well as a trouble-shooting list.
35
4 - BEFORE INITIAL START-UP
The instructions below apply to the standard machine and
for all cases. For 19XRV machines additional checks are
required: please refer to chapters 8 to 14 of this document.
4.1 - Necessary checks
4.1.1 - Job data required
Checks before system start-up: Before the start-up of the
refrigeration system, the complete installation, including
the refrigeration system must be verified against the
installation drawings, dimensional drawings, system piping
and instrumentation diagrams and the wiring diagrams.
During the installation test national regulations must be
followed. If no national regulation exists, paragraph 9-5 of
standard EN 378-2 can be used as a guide.
External visual installation checks:
• Compare the complete installation with the refrigeration
system and power circuit diagrams.
• Check that all components comply with the design
specifications.
• Check that all safety documents and equipments
required by the applicable European standard are
present.
• Verify that all safety and environmental protection
devices and arrangements are in place and comply
with the applicable European standard.
• Verify that all documents for pressure containers, certificates, name plates, files, instruction manuals required
by the applicable European standard are present.
• Verify the free passage of access and safety routes.
• Check that ventilation in the plant room is adequate.
• Check that refrigerant detectors are present.
• Verify that the instructions and directives to prevent
the deliberate removal of refrigerant gases that are
harmful to the environment are being applied.
• Verify the installation of connections.
• Verify the supports and fixing elements (materials,
routing and connection).
• Verify the quality of welds and other joints.
• Check the mechanical integrity of the machine.
• Check the protection against heat.
• Check the protection of moving parts.
• Verify the accessibility for maintenance or repair and
to check the piping.
• Verify the status of the valves.
• Verify the quality of the thermal insulation and of the
vapour barriers.
4.1.2 - Equipment required
• mechanic’s tools (refrigeration)
• digital volt-ohmmeter (DVM)
• clamp-on ammeter
• electronic leak detector
• absolute pressure manometer or wet-bulb vacuum
indicator
• 500-V insulation tester (megohmmeter) for compressor
motors with nameplate voltage of 1000 V or less, or a
5000-V insulation tester for compressor motor rated
above 1000 V.
36
4.1.3 - Using the optional storage tank and pumpout system
Refer to the transfer unit installation manual, document
order no. 19999, chapter “Pumpout and refrigerant transfer
procedures” section for: pumpout system preparation,
refrigerant transfer, and chiller evacuation.
4.1.4 - Remove shipping packaging
After receipt remove any packaging material from the unit.
4.1.5 - Open oil circuit valves
Check that the oil filter isolation valves (see Fig. 4 - “Lubrication system”) are open by removing the valve cap and
checking the valve stem.
4.1.6 - Tighten all gasketed joints and guide vane shaft
packing (torque depends on screw diameter)
Gaskets and packing normally relax by the time the chiller
arrives at the jobsite. Tighten all gasketed joints and the
guide vane shaft packing to ensure a leak tight chiller.
4.1.7 - Inspect water piping
Refer to piping diagrams provided in the certified drawings,
and the piping instructions in the 19XR Installation
Instructions manual. Inspect the piping to the cooler and
condenser. Be sure that flow directions are correct and
that all piping specifications have been met.
Do not introduce any significant static or dynamic pressure
into the heat exchange circuit (with regard to the design
operating pressures).
Before any start-up verify that the heat exchange fluid is
compatible with the materials and the water circuit coating.
In case additives or other fluids than those recommended by
Carrier are used, ensure that the fluids are not considered
as a gas, and that they belong to class 2, as defined in
directive 97/23/EC.
Carrier recommendations on heat exchange fluids:
• No NH4+ ammonium ions in the water, they are very
detrimental for copper. This is one of the most
important factors for the operating life of copper
piping. A content of several tenths of mg/l will badly
corrode the copper over time.
• Cl- Chloride ions are detrimental for copper with a
risk of perforations by corrosion by puncture. If
possible keep below 10 mg/l.
• SO42- sulphate ions can cause perforating corrosion, if
their content is above 30 mg/l.
• No fluoride ions (<0.1 mg/l).
• No Fe2+ and Fe3+ ions with non negligible levels of
dissolved oxygen must be present. Dissolved iron < 5
mg/l with dissolved oxygen < 5 mg/l.
• Dissolved silicon: silicon is an acid element of water
and can also lead to corrosion risks. Content < 1mg/l.
• Water hardness: >0.5 mmol/l. Values between 1 and
2.5 mmol/l can be recommended. This will facilitate scale
deposit that can limit corrosion of copper. Values that
are too high can cause piping blockage over time. A
carbonate hardness (TAC) below 100 is desirable.
•
•
•
Dissolved oxygen: Any sudden change in water oxygenation conditions must be avoided. It is as detrimental to
deoxygenate the water by mixing it with inert gas as it is
to over-oxygenate it by mixing it with pure oxygen. The
disturbance of the oxygenation conditions encourages
destabilisation of copper hydroxides and enlargement
of particles.
Specific resistance – electric conductivity: the higher the
specific resistance, the slower the corrosion tendency.
Values above 30 Ohm·m are desirable. A neutral
environment favours maximum specific resistance
values. For electric conductivity values in the order of
20-60 mS/m can be recommended.
pH: Ideal case pH neutral at 20-25°C
7 < pH < 8
If the water circuit must be emptied for longer than one
month, the complete circuit must be placed under nitrogen
charge to avoid any risk of corrosion by differential aeration.
Charging and removing heat exchange fluids should be
done with devices that must be included on the water
circuit by the installer. Never use the unit heat exchangers
to add heat exchange fluid.
Piping systems must be properly vented, with no stress on
waterbox pipes and covers. Use flexible connections to
reduce the transmission of vibrations. Water flows through
the cooler and condenser must meet job requirements.
Measure the pressure drop across cooler and across
condenser and compare this with the nominal values (see
selection document).
If the chiller is spring isolated, keep all springs blocked in
both directions in order to prevent possible piping stress
and damage during the transfer of refrigerant from vessel
to vessel during the leak test process, or any time refrigerant
is transferred. Adjust the springs when the refrigerant is in
operating condition, and when the water circuits are full.
If repairs are required, do not use R-134a, as it is not
designed and should not be used for leak detection.
WARNING: Do not use air or oxygen to pressurize the
chiller. Mixtures of R-134a and air can undergo combustion.
Check the optional pumpout compressor piping.
4.2.2 - Leak test chiller
Due to regulations on refrigerant emissions and the difficulties associated with separating contaminants from refrigerant,
Carrier recommends the following leak test procedures.
1. If the pressure readings correspond to the chiller
operating conditions:
a. Evacuate the holding charge from the vessels, if
present.
b. Raise the chiller pressure, if necessary, by adding
refrigerant until pressure is at equivalent saturated
pressure for the surrounding temperature. Follow
the pumpout procedures in sections 4.11 and 4.12
“Chiller equalization without pumpout unit” and
“Chiller equalization with pumpout unit”.
WARNING: Never charge liquid refrigerant into the
chiller, if the pressure in the chiller is less than 241 kPa
for HFC-134a. Charge as a gas only, with the cooler
and condenser pumps running, until this pressure is
reached, using PUMPDOWN LOCKOUT and
TERMINATE LOCKOUT mode on the PIC. Flashing
of liquid refrigerant at low pressures can cause tube
freeze-up and considerable damage.
2.
c. Leak test chiller as outlined in Steps 3 -9.
If the pressure readings do not correspond to the
chiller operating conditions:
a. Prepare to leak test chillers shipped with refrigerant
(step 2h).
b. Check for large leaks by connecting a nitrogen
bottle and raising the pressure to 207 kPa. Soap test
all joints. If the test pressure holds for 30 minutes,
prepare the test for small leaks (steps 2g to h).
c. Plainly mark any leaks which are found.
d. Release the pressure in the system.
e. Repair all leaks.
f. Retest the joints that were repaired.
g. After successfully completing the test for large
leaks, remove as much nitrogen, air, and moisture
as possible, given the fact that small leaks may be
present in the system. This can be accomplished
by following the dehydration procedure, outlined
in chapter 4.4 “Chiller dehydration”.
h. Progressively raise the system pressure to a maximum of 1103 kPa but no less than 241 kPa for
HFC-134a by adding refrigerant. Proceed with
the test for small leaks (steps 3 to 9).
Check the chiller carefully with an electronic leak
detector, or soap bubble solution.
If the optional pumpout storage tank and/or pumpout system
are installed, check to ensure the pumpout condenser water
has been piped in. Check for field-supplied isolation valves
and controls as specified in the job data. Check for refrigerant leaks on field-installed piping. See Figs. 18 and 19.
4.1.8 - Check relief devices
Be sure that relief devices have been piped to the outdoors
in compliance with standard EN 378-2. Piping connections
must allow for access to the valve mechanism for periodic
inspection and leak testing. 19XR relief valves are set to
relieve at 1250 kPa.
4.2 - Chiller tightness
4.2.1 - Check chiller tightness
Refer to Fig. 31.
19XR chillers are shipped with the refrigerant contained in
the condenser shell and the oil charge shipped in the
compressor.
The cooler will have a refrigerant charge that is compressed
to 225 kPa. Units may be ordered with the refrigerant
shipped separately, along with a compressed 225 kPa
nitrogen-holding charge in each vessel. To detect any leaks,
the chiller should be charged with refrigerant. Use an
electronic leak detector to check all flanges and solder joints
after the chiller is pressurized. If any leaks are detected,
follow the procedure described in chapter 4.2.2.
3.
37
4.
Leak determination - If an electronic leak detector
indicates a leak, use a soap bubble solution to locate the
leak. Total all leak rates for the entire chiller. Leakage
at rates greater than 0.45 kg/year for the entire chiller
must be repaired. Note total chiller leak rate on the
start-up report.
5. If no leak is found during initial start-up procedures,
complete the transfer of refrigerant gas from the pumpout storage tank to the chiller. For machines with the
optional storage tank refer to the transfer unit installation manual, document order no. 19999, chapter
“Pumpout and refrigerant transfer procedures” and
chapter 4.12 “Chiller equalization with pumpout unit”).
6. If no leak is found after a retest:
a. Transfer the refrigerant to the pumpout storage
tank and perform a standing vacuum test as outlined in chapter 4.3.
b. If the chiller fails this test, check for large leaks
(step 2b).
c. Dehydrate the chiller, if it passes the standing
vacuum test, as described in chapter 4.4 “Chiller
dehydration”. Charge chiller with refrigerant.
7. If a leak is found, pump the refrigerant back into the
pumpout storage tank, or if isolation valves are present,
pump into the non-leaking vessel (refer to the transfer
unit installation manual, document order no. 19999,
chapter “Pumpout and refrigerant transfer procedures”).
8. Transfer the refrigerant until chiller pressure is at 40 kPa
absolute.
9. Repair the leak and repeat the procedure, beginning
from step 2h to ensure a leaktight repair. (If chiller is
opened to the atmosphere for an extended period,
evacuate it before repeating leak test.)
10. The circuit openings must be plugged during repair, if
this does not take longer than one day. If it takes longer,
the circuits must be charged with nitrogen.
4.3 - Standing vacuum test
When performing the standing vacuum test or chiller dehydration, use a manometer or a wet bulb indicator. Dial
gauges cannot indicate the small amount of acceptable
leakage during a short period of time.
1. Attach an absolute pressure manometer or wet bulb
indicator to the chiller.
2. Evacuate the vessel to at least 41 kPa, using a vacuum
pump or the pumpout unit (refer to the transfer unit
installation manual, document order no. 19999, chapter
“Pumpout and refrigerant transfer procedures”).
3. Valve off the pump to hold the vacuum and record the
manometer or indicator reading.
4. a. If the leakage rate is less than 0.17 kPa in 24 hours,
the chiller is sufficiently tight.
b. If the leakage rate exceeds 0.17 kPa in 24 hours,
repressurize the vessel and test for leaks. If refrigerant is available in the other vessel, pressurize by
following steps 2 to 10 of chapter 4.2.2 “Leak test
chiller”. If not, use nitrogen and a refrigerant tracer.
Raise the vessel pressure in increments until the
leak is detected. If refrigerant is used, the maximum
gas pressure is approximately 483 kPa for R-134a at
normal ambient temperature. If nitrogen is used,
limit the leak test pressure to 1103 kPa maximum.
5. Repair leak, retest, and proceed with dehydration.
38
4.4 - Chiller dehydration
Dehydration is recommended if the chiller has been open
for a considerable period of time, if the chiller is known to
contain moisture, or if there has been a complete loss of
chiller holding charge or refrigerant pressure.
WARNING: Do not start or megohm-test the compressor
motor or oil pump motor, even for a rotation check, if the
chiller is under dehydration vacuum. Insulation breakdown
and severe damage may result.
Dehydration is readily accomplished at room temperatures.
Use of a cold trap (see Fig. 30 - “Dehydration cold trap”)
may substantially reduce the time required to complete the
dehydration. The higher the room temperature, the faster
dehydration takes place. At low room temperatures, a very
deep vacuum is required for boiling off any moisture. If the
ambient temperatures are low, contact a qualified service
representative for the dehydration techniques required.
Perform dehydration as follows:
1. Connect a high-capacity dehydration pump (0.002 m3/s
or larger is recommended) to the refrigerant charging
valve. Tubing from the pump to the chiller should be
as short and as large a diameter as possible to provide
least resistance to gas flow.
2. Use an absolute pressure manometer or a wet bulb
vacuum indicator to measure the vacuum. Open the
isolation valve to the vacuum indicator only when taking
a reading. Leave the valve open for 3 minutes to ensure
pressure equalization between detector and chiller.
3. Open all isolation valves (if present), if the entire
chiller is to be dehydrated.
4. With the chiller ambient temperature at 15.6°C or
higher, operate the vacuum pump until the manometer
reads ­-100.61 kPa or a vacuum indicator reads 1.7°C.
Operate the pump an additional 2 hours.
5. Do not apply greater vacuum than 100.97 kPa (757.4
mm Hg) or go below 0.56°C on the wet bulb vacuum
indicator. At this temperature/pressure, isolated pockets
of moisture can turn into ice. The slow rate of evaporation (sublimination) of ice at these low temperatures/
pressures greatly increases dehydration time.
6. Close the valve to which the vacuum pump is connected,
stop the pump, and record the instrument reading.
7. After a 2-hour wait, take another instrument reading. If
the reading has not changed, dehydration is complete. If
the reading indicates vacuum loss, repeat steps 4 and 5.
8. If the reading continues to change after several attempts,
do a leak test up to the maximum 1103 kPa pressure.
Locate and repair the leak, and repeat dehydration.
Fig. 30 - Dehydration cold trap
1.
2.
3.
4.
To vacuum pump
Mixture of dry ice and
methyl alcohol
Moisture condenses
on cold surface
From system
Fig. 31 - 19XR leak detection procedure
Leak test of 19XR
1 - Attach compound gauge -101-0-3000 kPa to each vessel
2 - Note ambient temperature gauge readings
Machines with refrigerant charge
1. Pressure on condenser vessel is
at refrigerant saturated conditions
2. Cooler pressure reading is 103
kPa or higher.
Machines with nitrogen holding charge
1. Pressure on condenser vessel is
less than saturated refrigerant
pressure.
2. Cooler pressure reading is below
103 kPa
3. Leak suspected
Record pressures
1. Pressure reading is less than 103
kPa but greater than 0 kPa
2. Leak suspected.
Record pressures
Raise pressure to 483 kPa with
nitrogen (if using electronic detector,
add tracer gas now)
Is either vessel at 0 kPa?
Power up controls to ensure oil
heater is on and oil is hot. Equalizer
pressure between cooler and
condenser
Pressure is at 103 kPa (factory
charge)
Release nitrogen and evacuate
holding charge from vessels
Add refrigerant until pressure is
above 241 kPa (if using electronic
detector, add tracer gas now)
Power up controls to ensure oil
heater is on and oil is hot. Equalizer
pressure between cooler and
condenser
Perform leak test
Perform leak test using soap bubble
solution, ultrasonics or electronic
detector
Add refrigernt until pressure is
241 kPa for HFC-134a.
No leaks found
No leaks found
Leaks found
Leaks found
Add refrigerant until pressure is
above 241 kPa for HFC-134a.
Perform leak test
Perform leak test
Leaks found
Locate and mark all leak sources
Recover refrigerant from vessel
Repair all leaks
Evacuate
vessel
No leaks found
Locate and
mark all leak
sources
Leaks found
No leaks found
Recover refrigerant from
vessel
Perform standing vacuum
test
Pass
1. Release the pressure in the
vessel
2. Repair all leaks
3. Retest only those joints
that were repaired
Fail
Dehydrate vessel if vessel was at atmospheric
pressure or lower.
Complete charging machine
39
4.5 - Inspect wiring
WARNING: Do not check voltage supply without proper
equipment and precautions. Serious injury may result.
CAUTION: Do not apply any kind of test voltage, even
for a rotation check, if the chiller is under a dehydration
vacuum. Insulation breakdown and serious damage may
result.
1.
2.
3.
4.
5.
6.
7.
Examine wiring for conformance to job wiring diagrams
and to all applicable electrical codes.
Check that the voltage(s) applied to the machine agree
with those on the component name plates. In particular:
- Compressor
- Compressor starter
- Control circuit transformers
- Oil pump
- Heater(s)
For low-voltage machines the check can simply be made
with a voltmeter.
Check that all electrical equipment and controls are
properly grounded in accordance with job drawings,
certified drawings, and all applicable electrical codes.
Make sure that the customer’s contractor has verified
proper operation of the pumps, cooling tower fans,
and associated auxiliary equipment.
Ensure that all power connections are tight.
Tighten up all wiring connections to the plugs on the
ISM and CCM modules.
The bus cable between the CCM and the ISM modules
will be supplied by the installer (refer to chapter 3.6.8
“Carrier Comfort Network interface”).
On chillers with wiring entering and leaving the cabinet
from the top debris can fall onto the contactors. Check
and clean the contactors if necessary.
The checks below are not required for 19XRV machines.
But they are replaced by additional checks. Please refer
to the appendix starting with chapter 8.
8. Compare the ampere rating on the starter nameplate
with the compressor nameplate. They must agree with
the thermal protection of the Carrier ISM board to
ensure that the overload trip current (OLTA) is not
be more than 108% of the rated load current.
9. The starter must include correctly assigned components
and terminals required for the unit PIC control. Check
the certified plans.
10. Check that the anti-short-circuit protections have
been installed upstream of the compressor power
supply circuits.
11. Check the compressor motor and power supply cable
insulation resistance: Use a 500 V insulation controller
(megohmmeter) for machines with a nominal voltage
below 1000 V. Use a 5000 V insulation controller for
compressor motors with a voltage above 1000 V:
a. Disconnect the power supply and observe the
usual applicable precautions.
b. Disconnect the motor supply wires at the starter
terminals.
40
c. The detector is connected to the motor wires,
measure the values in megohms every 10 and 60
seconds as follows:
- Six-lead motor: Tie all the leads together and
test the insulation referred to earth. Then tie
the leads in pairs, 1 and 4, 2 and 5, 3 and 6.
Test between each pair while earthing the
third pair.
- Three-lead motor: Tie terminals 1, 2, and 3
together and test the insulation referred to
earth.
- Divide the 60-second resistance reading by the
10-second reading. The ratio, or polarisation
index, must be one or higher. Both the 10- and
60-second readings must be at least 50
megohms.
- If the readings on a field-installed starter are
unsatisfactory, repeat the test at the motor with
the power leads disconnected. Satisfactory
readings in this second test indicate the fault
is in the power leads.
4.6 - Oil charge
The 19XR compressor holds approximately 30 l of oil for
frame 3 compressors; 38 l of oil for frame 4 compressors and
67.8 l for frame 5 compressors. The chiller will be shipped
with oil in the compressor. When the sump is full, the oil
level should be no higher than the middle of the upper
sight glass, and minimum level is the bottom of the lower
sight glass. If oil is added, it must meet Carrier’s specification
for centrifugal compressor usage as described chapter 7.3.5
“Oil changes”. Charge the oil through the oil charging
valve, located near the bottom of the transmission housing
(refer to Fig. 2 - “19XR machine components”). The oil
must be pumped from the oil container through the
charging valve due to higher refrigerant pressure. The
pumping device must be able to lift from 0 to 1380 kPa or
above unit pressure. Oil should only be charged or removed
when the chiller is shut down. The oil cylinder must not be
opened until charging begins. Only use new oil cylinders.
4.7 - Power-up the controls and check the oil heater
Ensure that an oil level is visible in the compressor before
energizing controls. A circuit breaker in the starter energizes
the oil heater and the control circuit. When first powered,
the ICVC should display the default screen within a short
period of time.
The oil heater is energized by powering the control circuit.
This should be done several hours before start-up to minimize oil-refrigerant migration. The oil heater is controlled
by the PIC and is powered through a contactor in the
control box. The oil heater relay status can be viewed on
the Status02 table on the ICVC. Oil sump temperature can
be viewed on the ICVC default screen.
4.8 - Check optional pumpout system controls and
compressor
Controls include an on/off switch, the compressor overloads,
an internal thermostat, a compressor contactor, and a
refrigerant high pressure cutout. The high pressure cutout
is factory set to open at a pressure which depends on the
approval code. Check that the water-cooled condenser has
been connected. Loosen the compressor holddown bolts to
allow free spring travel. Open the compressor suction and
discharge service valves. Check that oil is visible in the
compressor sight glass. Add oil if necessary.
For more details on refrigerant transfer, oil characteristics etc.
see sections 4.11 “Chiller equalization without pumpout
unit” and 4.12 “Chiller equalization with pumpout unit”.
4.9 - High altitude locations
Recalibration of the pressure transducers will be necessary,
because the chiller was initially calibrated at sea level.
4.10 - Charge refrigerant into chiller
CAUTION: The transfer, addition, or removal of refrigerant
in spring isolated chillers may place severe stress on
external piping if springs have not been blocked in both
up and down directions.
The standard 19XR chiller will have the refrigerant already
charged in the vessels. The 19XR may be ordered with a
nitrogen holding charge. Evacuate the entire chiller, and
charge chiller from refrigerant cylinders.
4.11 - 19XR Chiller equalization without pumpout unit
WARNING: When equalizing refrigerant pressure on the
19XR chiller after service work or during the initial chiller
start-up, do not use the discharge isolation valve to equalize.
Either the motor cooling isolation valve or charging hose
(connected between pumpout valves on top of cooler and
condenser) is to be used as the equalization valve.
For safety reasons this valve is supplied locked from the
factory. To manipulate the other valves a special tool
(key type) is required.
Manipulation of the valves must always be done by a
qualified person.
•
Once the pressures have equalized, the cooler isolation
valve, the condenser isolation valve, and the hot gas
isolation valve may now be opened.
WARNING: Whenever turning the discharge isolation
valve, be sure to attach the valve locking device. This will
prevent the valve from opening or closing during service
work or during chiller operation.
The valve is opened counter-clockwise, and closed clockwise.
4.12 - 19XR Chiller equalization with pumpout unit
The following procedure describes how to equalize refrigerant pressure on an isolated 19XR chiller using the pumpout unit:
• Access the TERMINATE LOCKOUT mode in the
Control Test menu of the ICVC.
• Turn on the evaporator and condenser water pumps
to prevent freezing.
• Open valve 4 on the pumpout unit and open valves 1a
and 1b on the chiller cooler and condenser (see Figs. 18
and 19). Progressively open valve 2 on the pumpout
unit to equalize the pressure. This process will take
approximately 15 minutes.
• Once the pressures have equalized, the discharge
isolation valve, cooler isolation valve, optional hot gas
bypass isolation valve, and the refrigerant isolation
valve can be opened. Close valves 1a and 1b, and all
pumpout unit valves.
The full refrigerant charge on the 19XR will vary with
chiller components and design conditions, indicated on the
job data specifications. An approximate charge is given on
the dimensional drawing supplied with the machine.
Always operate the water pumps during charging operations
to prevent freeze-ups. Use the Control Test Terminate
Lockout to monitor conditions and start the pumps.
If the chiller has been shipped with a holding charge, the
refrigerant will be added through the refrigerant charging
valve (see item 7 in Figs. 18 and 19) or through the pumpout
charging connection. First evacuate the nitrogen holding
charge from the chiller vessels. Charge the refrigerant as a
gas until the system pressure exceeds 141 kPa for HFC-134a.
After the chiller is beyond this pressure the refrigerant
should be charged as a liquid until all the recommended
refrigerant charge has been added.
To equalize the pressure differential on a refrigerant isolated
19XL chiller, use the TERMNATE LOCKOUT function of
the Control Test in the SERVICE menu. This will help to
turn on pumps and advise the proper procedure. The following procedure describes how to equalize refrigerant pressure
on an isolated 19XR chiller without a pumpout unit:
• Access TERMINATE LOCKOUT function on the
Control Test.
• Turn on the evaporator and condenser water pumps
to prevent freezing.
• Progressively open the refrigerant cooling isolation
valve. The chiller cooler and condenser pressures will
gradually equalize. This process will take approximately
15 minutes.
41
4.13 - Trimming refrigerant charge
5.2 - Dry run to test start-up sequence
The 19XR is shipped with the correct charge for the design
duty of the chiller. Trimming the charge can best be accomplished when design load is available. To trim, check the
temperature difference between leaving chilled water
temperature and cooler refrigerant temperature at full load
design conditions. If necessary, add or remove refrigerant
to bring the temperature difference to design conditions or
minimum differential. If the unit incorporates a sight glass
(option) and has a full charge, bubbling must take place in
the upper level of the vessel.
NOTE: This does not apply to 19XRV machines.
Refrigerant charge by evaporator size selected*
Size
kg
Size
30
277
60
31
308
61
32
340
62
35
322
65
36
359
66
37
391
67
40
381
70
41
413
71
42
440
72
45
440
75
46
477
76
47
508
77
50
520
80
51
560
81
52
589
82
55
617
85
56
648
86
57
667
87
kg
616
635
653
694
712
725
907
962
1007
1039
1103
1157
1007
1062
1112
1156
1215
1270
* The optimised charge can be different from the charge shown above.
5 - INITIAL START-UP
Attention: To comply with normal safety precautions
during start-up of electrical equipment the control box
must be closed during the initialisation tests on the
compressor supply circuit: it must be possible to carry out
all checks from outside the control box.
1.
2.
3.
4.
5.
5.1 - Preparation
Before starting the chiller, check that the:
1. Power is on to the main starter, oil pump relay, tower
fan starter, oil heater relay, and the chiller control centre.
2. Cooling tower water is at proper level and at or below
design entering temperature.
3. Chiller is charged with refrigerant and all refrigerant
and oil valves are in their proper operating position.
4. Oil is at the proper level in the reservoir sight glasses.
5. Oil reservoir temperature is above 60°C or refrigerant
temperature plus 28°C.
6. Evaporator and condenser water circuit valves are open.
NOTE: If the pumps are not automatic, check that
the water is circulating correctly.
WARNING: Do not permit water or brine that is
warmer than 52°C to flow through the cooler or
condenser. Refrigerant overpressure may discharge
through the relief devices and result in the loss of
refrigerant charge.
7.
42
Access the ‘Control test’ screen.
Scroll down to the PUMPDOWN/lockout option.
Press the SELECT button to permit chiller start-up and
select ‘YES’ to restart the unit in the operating mode.
NOTE: The unit is locked at the factory to prevent
accidental start-up.
6.
7.
Disconnect the main power supply so that there is no
power to the compressor starter. Ensure direct supply
upstream of disconnect switch QF11. Ensure that
voltage is present at the control circuit terminals, oil
pump and heater. Ensure that no voltage is present at
the compressor starter terminals in particular. There
must be no voltage return from the supply from QF11.
If an electronic starter is used, install a voltmeter to
read the compressor starter control voltage. If necessary
short-circuit the starter fault return terminals on the
PIC control (102/103 or directly J27/8 on the ISM
board - please refer to the wiring diagram).
Look at the default screen on the ICVC: the status
message in the upper left-hand corner “OCCUPIED
MODE’’ shows that the unit is in occupied mode and
ready to start. If this is not the case, go to the Schedule
screen and override the schedule or change the occupied
time. Press the LOCAL softkey to begin the start-up
sequences.
Check that chilled water and condenser water pumps
energize.
Check that the oil pump starts and pressurizes the
lubrication system. After the oil pump has run about
45 seconds, the starter will be energized and go
through its start-up sequence.
Check that the compressor starter control signal has
been given: cut-in of the main contactor or voltage
present on the voltmeter at the starter terminals.
The PIC will eventually show an alarm for motor
current not sensed. Reset this alarm and continue with
the initial start-up.
5.3 - Check rotation
1.
2.
3.
Switch on the supply to the starter power circuit. PIC
now controls the order of the phases connected to the
voltage measurement terminals on the ISM board. If
the ICVC shows a fault, the order of phases connected
to the starter must specifically be checked.
On the 19XRV machines this verification may be
duplicated by the starter/variable frequency drive.
Please refer to the appendix starting with chapter 8.
After the default screen Status message states “Ready
for Start’’ press the LOCAL softkey. The PIC control
now initialises the start-up procedure.
When the starter is energized and the motor begins to
turn, immediately at the start-up check for clockwise
rotation (see Fig. 32 - “Rotation diagram”).
IF ROTATION IS CORRECT, allow the compressor to
come up to speed.
5.7.1 - Cooler-condenser
Float chamber, relief devices, refrigerant charging valve,
temperature sensor locations, pressure transducer locations,
Schrader fittings, waterboxes and tubes, and vents and drains.
CAUTION: Do not check motor rotation during coastdown.
Rotation may have reversed during equalization of vessel
pressures.
5.7.2 - Optional pumpout storage tank and pumpout system
Transfer valves and pumpout system, refrigerant charging
and pumpdown procedure, and relief devices.
Fig. 32 - Rotation diagram
5.7.3 - Motor compressor assembly
Guide vane actuator, transmission, motor cooling system,
oil cooling system, temperature and pressure sensors, oil
sight glasses, integral oil pump, isolatable oil filter, extra oil
and motor temperature sensors, synthetic oil, and compressor
serviceability.
TATIO
N
RO
IF THE MOTOR ROTATION IS NOT CLOCKWISE
(as viewed through the sight glass), immediately stop the
motor. Specifically check the order of phases connected
between starter and motor.
5.4 - Check oil pressure and compressor stop
•
•
When the motor is up to full speed, note the differential
oil pressure reading on the ICVC default screen. It
should be between 124 to 206 kPa.
Press the Stop button and listen for any unusual
sounds from the compressor as it coasts to a stop.
5.5 - To prevent accidental start-up
A chiller STOP override setting may be entered to prevent
accidental start-up during service or whenever necessary.
Access the MAINSTAT screen and using the NEXT or
PREVIOUS softkeys, highlight the START/STOP parameter. Press the STOP softkey followed by the ENTER
softkey.
To restart the chiller the STOP override setting must be
removed. Access the MAINSTAT screen and using NEXT
or PREVIOUS softkeys select START/STOP. Three
choices are possible:
• START - forces the chiller ON
• STOP - forces the chiller OFF
• RELEASE - puts the chiller under remote schedule
control.
5.7.4 - Motor compressor lubrication system
Oil pump, cooler filter, oil heater, oil charge and specification,
operating and shutdown oil level, temperature and pressure,
and oil charging connections.
5.7.5 - Control system
CCN and ICVC start, reset, menu, softkey functions, ICVC
operation, occupancy schedule, set points, safety controls,
and auxiliary and optional controls.
5.7.6 - Auxiliary equipment
Starters and disconnects, pumps, and cooling tower.
5.7.7 - Describe chiller cycles
Refrigerant, motor cooling, lubrication, and oil reclaim.
5.7.8 - Review maintenance
Scheduled, routine, and extended shutdowns, importance
of a log sheet, importance of water treatment and tube
cleaning, and importance of maintaining a leak-free chiller.
5.7.9 - Safety devices and procedures
Electrical disconnects, relief device inspection, and handling
refrigerant.
5.7.10 - Check operator knowledge
Start, stop, and shut-down procedures, safety and operating
controls, refrigerant and oil charging, and job safety.
To return the chiller to normal control, press the RELEASE
softkey followed by the ENTER softkey. For more information, see the chapters relating to start-up in the Controls
manual.
5.6 - Check chiller operating condition
Check to be sure that chiller temperatures, pressures,
water flows, and oil and refrigerant levels indicate that the
system is functioning properly.
5.7 - Instruct the customer operator
Check to be sure that the customer operators understand
all operating and maintenance procedures. Point out the
various chiller parts and explain their function as part of
the complete system.
43
6 - OPERATING INSTRUCTIONS
6.1 - Operator duties
Become familiar with refrigeration chiller and related
equipment before operating the chiller.
1. Prepare the system for start-up, start and stop the
chiller, and place the system in a shutdown condition.
2. Maintain a log of operating conditions and document
any abnormal readings.
3. Inspect the equipment, make routine adjustments, and
perform a Control Test. Maintain the proper oil and
refrigerant levels.
4. Protect the system from damage during shutdown
periods.
5. Maintain the set point, time schedules, and other PIC
functions.
6.2 - To start the chiller
1.
2.
Start the water pumps, if they are not automatic.
On the ICVC default screen, press the LOCAL or
CCN softkey to start the system. If the chiller is in the
OCCUPIED mode and the start timers have expired,
the start sequence will begin. Follow the procedure
described in chapter 5.2 “Dry run to test start-up
sequence”.
6.3 - Check the running system
After the compressor starts, the operator should monitor
the CVC display and observe the parameters for normal
operating conditions:
1. The oil reservoir temperature should be above 49°C
during shutdown, and above 52°C during compressor
operation.
2. The bearing oil temperature accessed on the 'COMPRESS' status screen should be 49 to 74°C. If the
bearing temperature reads more than 83°C with the
oil pump running, stop the chiller and determine the
cause of the high temperature. Do not restart the
chiller until corrected.
3. The oil level should be visible anywhere in one of the
two sight glasses. Foaming oil is acceptable as long as
the oil pressure and temperature are within limits.
4. The oil pressure should be between 124 to 207 kPa
differential, as seen on the ICVC default screen.
5. The moisture indicator sight glass on the refrigerant
motor cooling line should indicate refrigerant flow
and a dry condition.
6. The condenser pressure and temperature varies with
the chiller design conditions. Typically the temperature
range will be 15 to 41°C. The condenser entering water
temperature should be controlled below the specified
design return water temperature to save on compressor
kilowatt requirements.
7. Cooler pressure and temperature also will vary with
the design conditions. Typically the temperature range
will be 1 to 8°C.
44
8.
The compressor may operate at full capacity for a short
time after the pulldown ramping has ended, even though
the building load is small. The pulldown rate can be
decreased to avoid a high demand charge for the short
period of high demand operation. Pulldown rate can
be based on power output or temperature rate. It is
accessed on the equipment service screen ‘RAMP DEM’.
IMPORTANT: Power equipment fault reports should be
checked on the ICVC first. On the 19XRV machines
additional information can be obtained by a direct check
on the starter device; please refer to the appendix starting
with chapter 8.
6.4 - To stop the chiller
The occupancy schedule will start and stop the chiller
automatically once the time schedule is set up.
By pressing the STOP button for one second, the alarm
light will blink once to confirm that the button has been
pressed. Then, the compressor will follow the normal shutdown sequence as described in chapter 6.2 of the Controls
manual. The chiller will not restart until the CCN or
LOCAL softkey is pressed. The chiller is now in the ‘Off
control’ mode.
NOTE: After the compressor has stopped the oil pump
must ensure post-lubrication. Other than for emergency
stops initiated by the control the compressor must not be
stopped by an action that also stops the oil pump. For
19XRV machines please refer to the appendix starting
with chapter 8. If the machine is stopped by an alarm, do
not restart it until the operating problem has been
diagnosed and corrected.
6.5 - After limited shutdown
No special preparations should be necessary. Follow the
regular preliminary checks and starting procedures.
6.6 - Extended shutdown
The refrigerant should be transferred into the pumpout
storage tank provided (refer to the transfer unit installation
manual, document order no. 19999, chapter “Pumpout and
refrigerant transfer procedures”) in order to reduce chiller
pressure and the possibility of leaks. Maintain a holding
charge of 2.27 to 4.5 kg of refrigerant or nitrogen to
prevent air from leaking into the chiller.
If freezing temperatures are likely to occur in the chiller
area, drain the chilled water, condenser water, and the
pumpout condenser water circuits to avoid freeze-up.
Keep the waterbox drains open.
Leave the oil charge in the chiller with the oil heater and
controls energized to maintain the minimum oil reservoir
temperature.
6.7 - After extended shutdown
6.10 - Refrigeration log
Be sure that the water system drains are closed. It is
recommended:
• to flush the water circuits to remove any soft rust
which may have formed
• to clean the tube vessel
• to inspect the probe pressure taps and change them, if
necessary.
A refrigeration log, like the one shown in Fig. 33 provides a
convenient checklist for routine inspection and
maintenance and provides a continuous record of chiller
performance. It is an aid in scheduling routine maintenance
and in diagnosing chiller problems.
Check the cooler pressure on the ICVC default screen, and
compare to the original holding charge that was left in the
chiller. If (after adjusting for ambient temperature changes)
any loss in pressure is indicated, check for refrigerant leaks.
See chapter 4.2.2 “Leak test chiller”.
Keep a record of the chiller pressures, temperatures, and
liquid levels on a sheet similar to that shown. Automatic
recording of PIC data is possible through the use of devices
connected to the CCN such as the Data Collection module
and a Building Supervisor. Contact your Carrier representative for more information.
Recharge the chiller by transferring refrigerant from the
pumpout storage tank (if supplied). Refer to transfer unit
installation manual, document order no. 19999 and sections
4.11 “Chiller equalization without pumpout unit” and 4.12
“Chiller equalization with pumpout unit”. Observe the
freeze-up precautions.
Carefully make all regular preliminary and running system
checks. Perform a Control Test before start-up. If the
compressor oil level appears abnormally high, the oil may
have absorbed refrigerant. Make sure that the oil temperature is above 60°C or cooler refrigerant temperature 27°C.
6.8 - Cold-weather operation
When the entering condenser water drops very low, the
operator should automatically cycle the cooling tower fans
off to keep the temperature up. The PIC controls have a
tower fan output (terminals 11 and 12 of the ISM).
6.9 - Manual guide vane operation
Manual operation of the guide vanes in order to control
the guide vanes in an emergency operation is possible by
overriding the target guide vane position. Access the
‘COMPRESS’ screen on the interface, and select TARGET
GUIDE VANE POSITION. To control the position, enter
a percentage of guide vane opening that is desired. Zero
percent is fully closed, 100% is fully open. To release the
guide vanes to AUTOMATIC mode, press the RELEASE
softkey.
NOTE: Manual control will increase the guide vane
opening and override the pulldown rate during start-up.
Manual control of the guide vanes will not have override
status in the following cases:
• Limitation overrides are active
• The chilled water temperature is below the set point.
The PIC control will then close the guide vanes.
For a description of capacity overrides and set points, see
the Capacity Override section in the Installation, Operation
and Maintenance Manual for the control.
45
46
or angle of guide vanes
Water
Temperature Pressure
(inlet/outlet, l/s)
Temperature
(inlet/outlet)
Condenser
Refrigerant
Pressure
Water
Temperature Pressure
(inlet/outlet, l/s)
Temperature
(inlet/outlet)
Compressor
Bearing temperature
Oil
Pressure change Temperature Level
(tank)
Notes: Indicate shutdowns on safety controls, repairs made, oil or refrigerant added or removed, air exhausted and water drained from dehydrator. Include amounts.
*
Evaporator
Date/Time Refrigerant
Pressure
Motor
(FLA - current*)
Operator initials Notes
Installation site........................................................................................ Model No....................................................................................Serial No. . ................................................................................................ Refrigerant type.............................
Date.............................................................................................................................
Fig. 33 - Refrigeration log
7 - MAINTENANCE
7.1 - General maintenance
During the unit operating life the service checks and tests
must be carried out in accordance with applicable national
regulations.
If there are no similar criteria in local regulations, the
information on checks during operation in annex C of
standard EN 378-2 can be used.
External visual checks: annex A and B of standard EN 378-2.
Corrosion checks: annex D of standard EN 378-2.
All refrigerant removal and draining operations must be
carried out by a qualified technician and with the correct
material for the unit. Any inappropriate handling can
lead to uncontrolled fluid or pressure leaks.
7.1.3 - Adding refrigerant
Follow the procedures described in chapter 4.10 “Charge
refrigerant into chiller”.
WARNING: Always use the compressor pumpdown function in the Control Test table to turn on the evaporator
pump and lock out the compressor when transferring
refrigerant. Liquid refrigerant may flash into a gas and
cause possible freeze-up when the chiller pressure is below
207 kPa for HFC-134a. Do not use used refrigerant.
These controls must be carried out:
• After an intervention that is likely to affect the resistance or a change in use or change of high-pressure
refrigerant, or after a shut down of more than two years.
Components that do not comply, must be changed.
Test pressures above the respective component design
pressure must not be applied (annex B and D).
• After repair or significant modifications or significant
system or component extension (annex B)
• After re-installation at another site (annexes A, B and
D)
• After repair following a refrigerant leak (annex D).
The frequency of refrigerant leak detection can vary
from once per year for systems with less than 1% leak
rate per year to once a day for systems with a leak
rate of 35% per year or more. The frequency is in
proportion with the leak rate.
7.1.4 - Removing refrigerant
If the optional pumpout system is used, the 19XR refrigerant charge may be transferred to a pumpout storage tank
(see chapter 4.12) or to the chiller condenser or cooler
vessels, if the machine includes isolation valves. Follow the
procedures in the transfer unit installation manual, document
order no. 19999, chapter “Pumpout and refrigerant transfer
procedures”), when removing refrigerant from the storage
tank to a chiller vessel.
NOTE 1: High leak rates are not acceptable. The necessary
steps must be taken to eliminate any leak detected.
7.1.6 - Refrigerant leak testing
Because HFC-134a is above atmospheric pressure at room
temperature, leak testing can be performed with refrigerant
in the chiller. Use an electronic leak detector, soap bubble
solution, or ultrasonic leak detector. Be sure that the room
is well ventilated and free from concentration of refrigerant
to keep false readings to a minimum. Before making any
necessary repairs to a leak, transfer all refrigerant from the
leaking vessel.
NOTE 2: Fixed refrigerant detectors are not designed to
find leaks as they cannot locate the leak.
7.1.1 - Soldering and welding
Component, piping and connection soldering and welding
operations must be carried out using the correct procedures
and by qualified operators. Pressurised containers must not
be subjected to shocks, nor to large temperature variations
during maintenance and repair operations.
7.1.2 - Refrigerant properties
HFC-134a is the standard refrigerant for the 19XR chiller.
At normal atmospheric pressure, HFC-134a will boil at -25°C
and must, therefore, be kept in pressurized containers or
storage tanks. The refrigerant is practically odorless when
mixed with air and is non-combustible at atmospheric
pressure. Read standard EN 378-2 to learn more about
safe handling of this refrigerant.
DANGER: HFC-134a will dissolve oil and some nonmetallic materials, dry the skin, and, in heavy concentrations, may displace enough oxygen to cause asphyxiation.
When handling this refrigerant, protect the hands and
eyes and avoid breathing fumes.
A valve under the condenser permits refrigerant removal
during the liquid phase.
7.1.5 - Adjusting the refrigerant charge
If the addition or removal of refrigerant is required for
improved chiller performance, follow the procedures given
in chapter 4.13 “Trimming refrigerant charge”.
Monitoring for and repair of leaks
National regulations isued after the Kyoto protocol and
the European F-gas regulation require monitoring for
leaks and repair of leaks.
Test after service, repair or major leak
If all refrigerant has been lost or if the chiller has been
opened for service, the chiller or the affected vessels must
be pressured and leak tested. Refer to chapter 4.2.2 “Leak
test chiller” to perform a leak test.
WARNING: HFC-134a should not be mixed with air or
oxygen and pressurized for leak testing. In general, this
refrigerant should not be present with high concentrations
of air or oxygen above atmospheric pressures, because the
mixture can undergo combustion.
47
Fig. 34 - Guide vane actuator linkage
Another method of leak testing is to pressurize with nitrogen
and to use a soap bubble solution or an ultrasonic leak
detector to determine if leaks are present. This should only
be done if all refrigerant has been evacuated from the vessel.
1. Install a copper tube from the pressure relief device
on the cylinder to the refrigerant charging valve.
2. Never apply full cylinder pressure to the pressurizing
line. Follow the listed sequence:
- Open the charging valve fully.
- Slowly open the cylinder regulating valve.
- Observe the pressure gauge on the chiller and
close the regulating valve when the pressure
reaches test level. Do not exceed 965 kPa.
- Close the charging valve on the chiller.
- Remove the copper tube if no longer required.
7.1.7 - Repair the leak and apply standing vacuum test
After pressurizing the chiller, test for leaks with an electronic leak detector, soap bubble solution, or an ultrasonic
leak detector. Bring the chiller back to atmospheric pressure,
repair any leaks found, and retest.
After retesting and finding no leaks, apply a standing vacuum
test, and then dehydrate the chiller. Refer to chapters 4.3
“Standing vacuum test” and 4.4 “Chiller Dehydration” in
the section 4 “Before initial start-up” .
7.1.8 - Checking guide vane linkage
When the chiller is off, the guide vanes are closed and the
actuator mechanism is in the position shown in Fig. 34 “Guide vane actuator linkage”.
If slack develops in the drive chain, backlash can be
eliminated as follows:
1. With the chiller shut down and the actuator fully closed,
remove the chain guard and loosen the actuator
bracket holddown bolts.
2. Loosen guide vane sprocket adjusting bolts.
3. Pry bracket upwards to remove slack, then retighten
the bracket holddown bolts.
4. Retighten the guide vane sprocket adjusting bolts.
Make sure that the guide vane shaft is rotated fully in
the clockwise direction in order for it to be fully closed.
7.1.9 - Trim refrigerant charge
If, to obtain optimal chiller performance, it becomes necessary to adjust the refrigerant charge, operate the chiller at
design load and then add or remove refrigerant progressively
until the difference between leaving chilled water temperature and the saturated evaporating temperature becomes
optimal. Do not overcharge.
Refrigerant may be added either through the storage tank
(see chapters 4.11 “Chiller equalization without pumpout
unit” and 4.12 “Chiller equalization with pumpout unit”)
or directly into the chiller as described in chapter 4.10
“Charge refrigerant into chiller”.
To remove any excess refrigerant, follow the procedures in
the transfer unit installation manual, document order no.
19999, chapter “Transfer the refrigerant from chiller to
pumpout storage tank”, steps 1a and 1b or use the service
valve under the condenser (this transfers high-pressure
liquid refrigerant).
48
1.
2.
3.
4.
5.
6.
7.
8.
Actuator sprocket
Chain guard
Guide vane shaft
Electronic vane actuator
Drive chain
Actuator bracket hold-down bolts
Guide vane sprocket
Guide vane sprocket adjusting bolts
7.2 - Weekly maintenance
Check the lubrication system
Mark the oil level on the reservoir sight glass, and record
the level each week while the chiller is shut down.
If the level goes below the lower sight glass, check the oil
reclaim system for proper operation. If additional oil is
required, add it through the oil drain charging valve (see
Fig. 4 - “Lubrication system”). A pump is required to complete
the oil charge against refrigerant pressure. The oil charge is
approximately:
Compressor size
2
3
4
5
Oil charge, l
19
30
38
68
The oil used must meet Carrier specifications for the 19XR.
Refer to chapters 7.3.5 “Oil changes” and 7.3.7 “Oil reclaim
filter”. Any additional oil used should be logged by noting
the amount and date. Surplus oil will return to the sump
and must be removed.
A 1800-Watt oil heater is controlled by the PIC to maintain
oil temperature (see the Controls section) when the compressor is off. The Status02 screen of the ICVC displays whether
the heater is energized or not. If the PIC shows that the
heater is energized, but the sump is not heating up, the
power to the oil heater may be off or the oil level may be
too low. Check the oil level, the oil heater contactor voltage,
and oil heater resistance.
The PIC will not permit compressor start-up if the oil temperature is too low. The control will continue with start-up
only after the temperature is within limits.
7.3 - Scheduled maintenance
8.
Any work must be done by authorised personnel. Establish
a regular maintenance schedule based on the actual chiller
requirements such as chiller load, run hours, and water
quality. The time intervals listed in this section are offered
as guides to service only.
9.
7.3.1 - Service ontime
The ICVC will display a SERVICE ONTIME value on the
'MAINSTAT' status screen. This value should be reset by
the service person or the operator each time major service
work is completed so that time between service can be
viewed.
7.3.2 - Inspect the electrical equipment
Maintenance is limited to general cleaning and tightening of
connections. Vacuum the cabinet to eliminate dust build-up.
If the chiller control malfunctions, refer to the Troubleshooting Guide section in the controls manual for control
checks and adjustments.
CAUTION: Be sure power to the equipment is off when
cleaning and tightening connections inside the unit. Access
to the electrical equipment of 19XRV units requires special
precautions. Please refer to the appendix starting with
chapter 8.
Check safety and operating controls monthly
Carry out the “Control test” at least once per month. Refer
to the controls manual for safety control settings.
7.3.3 - Changing oil filter
Change the oil filter on a yearly basis or when the chiller is
opened for repairs. The 19XR has an isolatable oil filter so
that the filter may be changed with the refrigerant remaining
in the chiller. Use the following procedure (refer Fig. 4 “Lubribation system”):
1. Make sure that the power supply circuits for the
compressor and the oil pump are disconnected.
2. Close the oil filter isolation valves.
3. Connect an oil charging hose from the oil charging
valve and place the other end in a clean container for
used oil. The oil sample from the filter sump must be
sent to a laboratory for proper analysis. Do not
contaminate this sample.
4. Progressively open the charging valve to drain the oil
from the housing.
CAUTION: The oil filter housing is at a high pressure.
Relieve this pressure slowly.
5.
Once all oil has been drained, place some rags or
absorbent material under the oil filter housing to catch
any drips once the filter is opened. Remove the 4 bolts
from the end of the filter housing and remove the
filter cover.
Remove the filter retainer by unscrewing the retainer
nut. The filter may now be removed and disposed of
properly.
Install a new filter. Install the filter retainer and tighten
down the retainer nut. Install the filter cover and
tighten the 4 bolts.
6.
7.
Evacuate the filter housing by placing a vacuum pump
on the charging valve. Follow the normal evacuation
procedures. Shut the charging valve when done and
reconnect the valve so that new oil can be pumped
into the filter housing. Fill with the same amount that
was removed, then close the charging valve.
Remove the hose from the charging valve, open the
isolation valves to the filter housing, and turn on the
power to the oil pump and thecompressor again.
7.3.4 - Oil specification
The oil must meet the following specifications:
• Oil that is compatible with R-134a
• Inhibited polyolester-based synthetic compressor oil
formatted for use with HFC, gear-driven, hermetic
compressors, viscosity grade 68.
7.3.5 - Oil changes
Carrier recommends changing the oil after the first year of
operation and every three years thereafter in addition to
an oil analysis. However, if a continuous oil monitoring
system is used and a yearly oil analysis is performed
(Periodic Oil Diagnosis), time between oil changes can be
extended.
To change the oil
1. Transfer the refrigerant into the chiller condenser (for
isolatable vessels) or a pumpout storage tank.
2. Mark the existing oil level.
3. Open the control and oil heater circuit breaker.
4. When the chiller pressure is 34 kPa or less, drain the
oil reservoir by opening the oil charging valve (refer
to Fig. 2 - “19XR machine components”). Progressively
open the valve against refrigerant pressure (see chapter
1 - “Safety considerations”).
5. Change the oil filter at this time.
6. Change the refrigerant filter at this time.
7. Charge the chiller with oil. The 19XR uses approximately 30/38 l (compressor size 3/compressor size 4),
so that the oil level is visible in the upper sight glass
(refer to Fig. 2 - “19XR machine components”). Turn
on the power to the oil heater and let the PIC warm it
up to at least 60°C. Access the control test mode and
operate the oil pump manually for 2 minutes. The oil
level should be half full between the lower sight glass
and the upper sight glass during shutdown.
7.3.6 - Refrigerant filter
A refrigerant filter/drier, located on the refrigerant cooling
line to the motor, should be changed once a year or more
often, if filter condition indicates a need for more frequent
replacement. Change the filter by closing the filter isolation
valves (refer to Fig. 3 - “Typical 19XR unit diagram”) and
progressively opening the flare fittings to relieve the pressure.
A moisture indicator sight glass is located beyond this filter
to indicate the volume and moisture in the refrigerant. If
the moisture indicator indicates moisture, locate the source
of water by performing a thorough leak check.
49
7.3.7 - Oil reclaim filter
The oil reclaim system has a strainer on the eductor suction
line, a strainer on the discharge pressure line, and a filter
on the cooler scavanging line. Replace the filter once per
year or more often if filter condition indicates a need for
more frequent replacement. Change the filter by closing
the filter isolation valves (see Fig. 4 - “Lubrication circuit”)
and progressively opening the flare fitting to relieve the
pressure. Change the strainers once every 5 years or
whenever the cooler is evacuated of refrigerant.
7.3.8 - Inspect refrigerant float system
Perform inspection every year or when the condenser is
opened for service. Transfer the refrigerant into the cooler
vessel (if it includes isolation valves) or into a pumpout
storage tank. Remove the float access cover. Clean the
chamber and valve assembly thoroughly. Be sure that the
valve moves freely. Make sure that all openings are free of
obstructions. Examine the cover gasket and replace if
necessary. See Fig. 35 - “19XR float valve design” for a
view of the float valve design. For linear float valve designs,
inspect orientation of the float slide pin. It must be pointed
toward the bubbler tube for proper operation.
Fig. 35 - 19XR float valve design
As a minimum, the following maintenance is required:
• At least once a year, disconnect the vent piping at the
valve outlet and carefully inspect the valve body and
mechanism for any evidence of internal corrosion or
rust, dirt, scale, leakage, etc.
• If corrosion or foreign material is found, do not
attempt to repair or recondition. Replace the valve.
• If the chiller is installed in a corrosive atmosphere or
the relief valves are vented into a corrosive
atmosphere, make valve inspections at more frequent
intervals.
7.3.10 - Verification of the pressure switch calibration
Reverse the three-way valve direction so that the standby
pressure switch will start operation.
Remove the first pressure switch and have its calibration
verified by a qualified body - see annex C paragraph
C6-EN378-2.
Once the calibration has been verified, re-install the
pressure switch on the three-way valve and again reverse
the valve to again permit operation of the pressostat.
7.3.11 - Compressor bearing and gear maintenance
To ensure good bearing and gear maintenance proper
lubrication is imperative. Use the proper grade of oil,
maintained at recommended level, temperature, and
pressure. Inspect the lubrication system regularly and
thoroughly.
To inspect the bearings, a complete compressor teardown
is required. Only a trained service technician should remove
and examine the bearings. The cover plate on older compressor bases was used for factory-test purposes and is not
usable for bearing or gear inspection. The bearings and
gears should be examined for signs of wear.
1.
2.
3.
4.
5.
6.
7.
Refrigerant inlet from FLASC chamber
Linear float assembly
Float screen
Bubble line
Float cover
Refrigerant outlet to cooler
Gasket
7.3.9 - Inspect relief valves and piping
Refer to chapter 1 "Safety considerations". The relief valves
on this chiller protect the system against the potentially
dangerous effects of overpressure. These devices must be
kept in peak operating condition.
50
The frequency of examination is determined by the hours
of chiller operation, load conditions during operation, and
the condition of the oil and the lubrication system. Excessive
bearing wear can sometimes be detected through increased
vibration or increased bearing temperature. If either
symptom appears, contact an experienced and responsible
service organization for assistance.
Fig. 36 - Compressor fits and clearances
Thrust
Compressor transmission area
Thrust
Low-speed shaft thrust disk
High-speed shaft
Compressor assembly torques
Legend
2 - 3 - 4 See table below
5 Impeller clearance to shroud: allows 15.48 mm (0.024 in) forward movement
from thrust position for Frame 3 compressors; 19.35 mm (0.030 in) for Frame
4 compressors.
6 Impeller shimming to be determined at assembly
A-B-C-D-E-F-G = Max./min. installation clearances in mm (see table below):
Compressor A
types
0.1270
221-299
0.1016
0.1270
321-389
0.1016
0.1397
421-489
0.1092
0.1753
521-599
0.1499
B
C
D
E
F
G
0.1270
0.1016
0.1270
0.1016
0.1346
0.1092
0.1651
0.1397
0.2921
0.1016
0.2921
0.2032
0.2540
0.1270
0.0254
0.1524
4.8260
0.1016
0.5588
0.3048
0.6858
0.4318
8.8900
6.3500
0.0508
0.0127
0.0508
0.0127
0.0737
0.0356
0.0787
0.0432
0.1270
0.1016
0.1270
0.1016
0.1219
0.0965
0.1575
0.1321
3.9878
0.6528
3.9878
0.6528
0.8636
0.6096
1.3462
1.0922
Item
2
3
4
*
*
*
*
*
Description
Bull gear retaining bolt
Demister bolts
Impeller retaining bolt
Oil heater grommet nut
Guide vane shaft seal nut
Motor terminals
Motor terminals (high voltage)
Insulator
Packing nut
Brass jam nut
Torque N-m
08-115
20-26
60-62
14
34
60
2.7 - 5.4
6.8
13.6
Not shown
Notes
- All clearances for cylindrical surfaces are diametrical.
- Dimensions are with rotor in thrust position.
- Dimensions shown are in mm.
51
7.3.12 - Inspect the heat exchanger tubes
Cooler
Inspect and clean the cooler tubes at the end of the first
operating season. Because these tubes have internal ridges,
a rotary-type tube cleaning system is necessary to fully
clean the tubes. Upon inspection, the tube condition will
determine the scheduled frequency for cleaning and will
indicate whether water treatment is adequate in the chilled
water/brine circuit. Inspect the entering and leaving chilled
water temperature sensors for signs of corrosion or scale.
If a sensor or the probe connections are scaled or the water
flow control probes are corroded, they should be changed.
Verify the flow and speed with the data in the Electronic
Catalogue selection program for the unit.
Condenser
Since this water circuit is usually an open system, the tubes
may be subject to contamination and scale. Clean the
condenser tubes with a rotary tube cleaning system at least
once per year and more often if the water is contaminated.
Inspect the entering and leaving condenser water sensors
for signs of corrosion or scale. Replace the sensor if corroded
or remove any scale if found.
Verify the flow and speed with the data in the Electronic
Catalogue selection program for the unit.
Higher than normal condenser pressures, together with the
inability to reach full refrigeration load, usually indicate dirty
tubes or the presence of air in the chiller. If the refrigeration
log indicates a rise above normal condenser pressures, check
the condenser refrigerant temperature against the leaving
condenser water temperature. If this reading is more than
what the design difference is supposed to be, then the
condenser tubes may be dirty or water flow may be incorrect.
Because HFC134-a is a high-pressure refrigerant, air usually
does not enter the chiller. In certain cases where a zinc
anode (option) is used, regularly check its condition.
During the tube cleaning process, use brushes especially
designed to avoid scraping and scratching the tube wall.
Contact your Carrier representative to obtain these brushes.
Do not use wire brushes.
CAUTION: Scale may require chemical treatment for its
prevention or removal. Consult a water treatment specialist
for proper treatment.
7.3.13 - Water leaks
Water is indicated during chiller operation by the refrigerant
moisture indicator (see Fig. 2 - “19XR machine components”)
on the refrigerant motor cooling line. Water leaks must be
repaired immediately.
CAUTION: Chiller must be dehydrated after repair of
water leaks. See chapter 4.4 “Chiller dehydration”.
52
7.3.14 - Water treatment
Untreated or improperly treated water may result in
corro-sion, scaling, erosion, or algae. The services of a
qualified water treatment specialist should be obtained to
develop and monitor a treatment programme.
CAUTION: Water must be within design flow limits, clean,
and treated to ensure proper chiller performance and reduce
the potential of tube damage due to corrosion, scaling,
erosion, and algae. Carrier assumes no responsibility for
chiller damage resulting from untreated or improperly
treated water.
7.3.15 - Inspect the starting equipment
Before working on the electrical equipment, shut off the
chiller. Ensure that no circuit is energised and that all are
isolated by a main disconnect switch.
The specific maintenance instructions for starting equipment
for 19XRV machines are given in the appendix, starting
with chapter 8.
Check the cable tightness.
7.3.16 - Check pressure transducers
Once a year, the pressure transducers should be checked
against a pressure gauge reading. Check all four transducers:
the two oil differential pressure transducers, the condenser
pressure transducer, and the cooler pressure transducer, and
the water-side evaporation probes (two on the condenser
and two on the evaporator).
Note the evaporator and condenser pressure readings on the
ICVC 'HEAT-EX' status screen. Attach an accurate set of
refrigeration gauges to the cooler and condenser Schrader
fittings. Compare the two readings. If there is a difference
in readings, the transducer can be calibrated, as described in
the Troubleshooting Guide in the controls manual. Oil
differential pressure should be zero whenever the compressor
is off.
7.3.17 - Corrosion control
All metallic parts of the unit (chassis, casing panels, control
boxes, heat exchangers etc.) are protected against corrosion
by a coating of powder or liquid paint. To prevent the risk
of blistering corrosion that can appear when moisture
penetrates under the protective coatings, it is necessary to
carry out periodic checks of the coating (paint) condition.
APPENDIX: Particulars OF 19XRV PIC III machines
Specific operating and maintenance instructions for machines
equipped with the Rockwell Liquid-Flo 2 variable-frequency
drive (VFD).
8 - 19XRV PIC III - safety considerations for
maintenance
WARNING: For VFD box VFD 900-1169A do not
disconnect the evaporator and condenser before VFD box
900-1169A has been disconnected and removed. This VFD
box has a high-level centre of gravity and can tip over when
the heat exchangers are disconnected, which can lead to
material damage and/or serious injuries to personnel.
8.1 Electrical maintenance
Access to low-voltage electrical equipment is dangerous
and can result in death or serious injury.
Personnel working on the control boxes must be qualified
to work on low-voltage installations in accordance with the
safety regulations applicable at the site. It must be authorized
for the work and familiar with the equipment and the
installation, as well as the instructions and safety measures
described in this document.
Never work on a unit that is energized.
Do not work on any electrical components, until the main
unit power supply has been switched off using the disconnect
switch(es) integrated into the control box(es).
During maintenance periods lock the power supply circuit
upstream of the unit in the open position.
Attention: 19XRV control boxes are equipped with
capacitor coils with a discharge time after a power cut of
five minutes. If the discharge circuit in the capacitor fails
it is not possible to define the discharge time.
WARNING: Do not attempt to remove the VFD, before
closing the shut-off valve on the refrigerant circuit. If this
warning is not observed, the VFD removal will lead to a
significant and uncontrolled refrigerant leak. A refrigerant
leak can damage the machine and displace oxygen, which
can cause asphyxiation.
1.
2.
3.
4.
After cutting the power supply to the control box, wait
five minutes before accessing the control box.
5.
Ensure that there is no power supply to any conducting
parts of the power circuit that are accessible during the
work.
6.
8.2 - Mechanical maintenance
These are special instructions to disassemble a chiller
equipped with VFD.
7.
Close the two filter-drier shut-off valves and VFD
cooling circuit shut-off valve. Purge the refrigerant
from the VFD heat exchanger using the Schrader
valve at the side of the filter (refer to Fig. 37 - "VFD
cooling circuit".
Remove all VFD power supply cables (see Fig. 38
"VFD box installation (rear view)".
Remove the middle part of the terminal boxes (see
Fig. 39 -"VFD - tunnel-side view".
Identify and disconnect the motor terminals. Note the
position of the power wiring cable lugs and use the
same position during the re-assembly.
Remove the earth connection from the motor. Note the
earth connection position and use the same position
during the re-assembly.
Identify and disconnect the power wiring cables and
all communication and connection cables between the
VFD box and the interface box - see Fig. 38 - "VFD
box installation (rear view)".
Remove the access panels at the rear of the VFD and
disconnect the cooling circuit lines. Plug all openings.
Important: Only a qualified technician can carry out
these operations.
WARNING: Do not attempt to disconnect the flanges, if
the chiller is under pressure. The chiller has not been purged,
and this can cause injuries or damage to the machine.
Attention: Before lifting the compressor, disconnect
all cables entering the interface box.
8.2.1 - Removal of the VFD box
Ensure that the power supply has been disconnected and
that all safety measures are in place, before removing the
VFD box. This procedure minimises the number of sensors
and cables that need to be disconnected.
53
Fig. 37 - VFD cooling circuit
1.
2.
3.
4.
5.
6.
7.
8.
9.
Condenser
Evaporator
VFD cooling circuit shut-off valve
VFD cooling soleniod valve
VFD cooling filter
Filter-drier
Filter-drier shut-off valves
Schrader connection
Motor cooling line sight-glass
1.
2.
3.
4.
5.
6.
Condenser
Evaporator
VFD support bars
Communication cable
Oil heater power wiring cable
Oil pump power wiring cable
Fig. 38 - VFD box installation (rear view)
54
Fig. 39 - VFD tunnel-side view
•
•
Use an overhead or independent lifting bridge (nominal
capacity of 2 tonnes minimum), attach a fall-arresting
chain to each point to ensure safe lifting of the VFD.
Lift to apply tension and remove the screws fixing the
VFD control box to its support on the condenser.
NotE: To re-assemble follow these instructions in reverse
order. Connect the sensors and the cables after securing
the installation of the main parts, to avoid the risk of
damaging them.
8.2.3 - Separate the evaporator from the condenser
NotE: If condenser and evaporator must be separated,
the heat exchangers must be kept level by placing a support
plate under the tube sheets. The support plate helps keeping
the heat exchangers level and aligning them when they
are re-assembled.
1.
2.
3.
4.
5.
Condenser
Evaporator
VFD box
Motor terminal box (middle part)
Compressor motor
Remove all cables from the probes and sensors. Cut the
cable paths required to separate the two heat exchangers.
8.2.2 - Lifting of the VFD control box
Precautions must be taken to prevent any damage due to a
fall or shock, if the VFD control box is removed. A fork-lift
truck or a similar lifting and transport device can be used.
Place chains on the VFD so that there is an equal load at the
lifting points. Use a lifting beam, if the angle of the chains
is less than 45° from the horizontal level. Avoid shocks when
the VFD is lifted.
CAUTION: For control box VFD 900 – 1160A, the lifting
brackets on top of the control box permit attaching chains
to the VFD control box. They must never be used to chain
and lift the chiller.
Use the following procedure to lift the VFD
• Attach a chain to each lifting hole provided at the
lifting supports (these lifting supports are factoryinstalled at the top of the VFD control box. Ensure
that the chains do not form an angle of less than 45°
to the horizontal level.
Fig. 40 - Lifting the VFD
45° minimum
Attention: With VFD control box 900 or 1160A the
evaporator must not be separated from the condenser
without first disconnecting and removing the control box.
The VFD control box type has a high-level centre of gravity
and can tip over at the moment when the heat exchangers
are separated, if the control box is not separated first.
This can result in material damage and a serious injury
risk for the personnel.
•
•
•
•
•
•
•
Place a support plate under each tube sheet to keep
the heat exchangers level.
Cut the motor cooling line at the point shown in Fig.
41 - "Detailed perspective view of the unit", item 2.
Disconnect discharge elbow from the compressor.
Disconnect liquid line flange from the float chamber,
indicated in in Fig. 41, item 8.
Plug all openings. Disconnect all cables that cross from
one heat exchanger to the other (see Fig. 42 - "Unit
rear/side"):
- Probe and sensor cables of the water boxes.
- Motor power wiring cables from the terminal box.
- Communication and connecting cables between the
VFD and the interface box.
Remove the connecting plates from the tube sheets
(see Fig. 41, item 5).
Keep the disconnected heat exchangers separate.
8.2.4 - Separate the compressor from the evaporator
• Remove the suction and discharge bends (see Fig. 41,
items 1 and 10).
• Cut the motor cooling line at the point shown in Fig. 41,
item 2.
• Disconnect the motor cooling return line, as shown in
Fig. 41, item 2.
55
•
•
•
•
•
Disconnect the following elements:
- The cable from the compressor oil temperature
sensor. See Fig. 44 - “Compressor details”, item 4.
- The cable from the compressor bearing temperature
sensor - see Fig. 44, item 2.
- The cable from the motor temperature sensor
- see Fig. 44, item 1.
- The communication and connection cables between
the VFD control box and the interface box.
- The discharge temperature sensor cable.
- The compressor oil pressure sensor cable - see
Fig. 44, item 3.
- The compressor oil discharge pressure sensor
cable - see Fig. 44, item 5.
- The guide vane motor cable.
- The diffuser motor cable (for compressor 02XR5
and 02XR4 with separate diffuser (SRD) - see
Fig. 42 - “Unit rear/side view”, item 2.
- The diffuser pressure sensor cable (for compressor
02XR5 and 02XR4 with separate diffuser (SRD)
- see Fig. 44, item 8.
Disconnect the oil recovery line connections - see Fig.
41 - “Detailed perspective view of the unit”, item 9.
Plug all openings.
Disconnect the power wiring cables from the VFD
control box.
Remove the screws mounting the compressor on the
evaporator support.
Lift the compressor.
8.2.5 - Lifting the compressor
NotE 1: The motor part of the compressor is heavy and
leans towards the rear, unless the following precautions
are taken:
• Use two wooden beams with a diameter of 100 to
150 mm of the same length as the compressor.
• Drill holes into these beams to attach them to the
compressor base, using the holes provided.
notE 2
• Each time the O-ring is replaced, use an O-ring
lubrifier.
• For all new O-rings, use a joint sealer.
• The heat exchangers must be lifted vertically. Lifting
must be done at the four corners of the tube sheets,
provided for this purpose.
Fig. 41 - Detailed perspective view of the unit
See Fig. 44
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
56
Compressor suction elbow (screws removed)
Motor cooling line (cut)
Motor terminal box (screws removed)
Tube sheet
Tube sheet fixing plate (screws removed - 4 places)
Motor cooling outlet line (screws removed)
Compressor fixings (screws removed - 4 places)
Liquid line (screws removed)
Oil return line (screws removed)
Compressor discharge elbow (screws removed)
Condenser
Evaporator
Compressor
Fig. 42 - Unit rear/side view
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
Guide vane motor cables
Diffuser motor (compressor size 5, and as an option on size 4)
Hot gas bypass circuit (option)
Condenser leaving water pressure sensor cable
Condenser leaving water temperature sensor cable
Condenser entering water temperature sensor cable
Condenser entering water pressure sensor cable
Heat exchanger fixing
Evaporator entering water temperature sensor cable
Evaporator entering water pressure sensor cable
Evaporator leaving water temperature sensor cabler
Evaporator leaving water pressure sensor cable
Control interface (ICVC)
Guide vane motor
Fig. 44 - Compressor details
1.
2.
3.
4.
5.
6.
7.
8.
Fig. 43 - VFD box support installation
1.
2.
3.
4.
Condenser
Handling points
VFD support assembly
VFD support end plate fixings (8 places)
Motor temperature sensor cable
Bearing temperature sensor connection (inside box)
Compressor oil pressure sensor cable
Compressor oil temperature sensor cable
Compressor oil discharge pressure sensor cable
Discharge temperature sensor cable
Guide vane motor cables
Diffuser motor (compressor size 5, and as an option on size 4)
Fig. 45 - VFD box installation (front view)
1.
2.
3.
4.
5.
Condenser
Evaporator
VFD box fixings (10 places)
VFD support end plate
VFD box
57
9 - 19XRV PIC III - Equipment presentation
9.3 - Description of electrical equipment elements
9.1 - Environmental conditions
The electrical equipment of 19XRV machines is included
in two separate control boxes:
• The PIC III control box. The dimensions and components of the control boxes are the same for the full
range up to 608 A.
• The variable-frequency drive control box is available
in four versions in the range up to 608 A:
The operating and storage conditions are as those described
for the standard machine. The machines must be installed
inside the building. Control boxes are protected against
water projections to IP*1 in accordance with standard
IEC60529-1: they are protected against accidental and
exceptional vertical water projections.
9.2 - CE marking
The 19XRV electrical equipment is designed to ensure
machine conformity with all applicable European directives:
• Machinery directive 98/37/EC modified and low-voltage
directive 2006/90/EC:
The electrical equipment is designed in accordance with
the recommendations of the harmonised European
standard EN60204-1 that recommends the use of
components that comply with the relevant IEC standards.
The variable-frequency drive cabinet is certified in
accordance with standard EN50178. Its integration in
the machine complies with the directives of standard
EN60204-1.
• European directive 2004/108/EEC (Electromagnetic
compatibility):
Conformity is assured by application of the product
standard EN61800-3 that applies to variable-speed
power drives.
58
Version
Nominal
voltage, V
Maximum
current draw, A
Maximum
current output, A
19XR-506---912
380 to 400
440
440
19XR-506---922
380 to 400
608
608
19XR-506---802
380 to 400
900
900
19XR-506---812
380 to 400
1169
1169
For details and the component location in the control box
refer to the wiring diagram supplied with the machine.
9.3.1 - The PIC III control box
The PIC III control equipment mainly includes (identified
in accordance with the references on the wiring diagram):
• The internal control circuit transformer (TC1) and the
heater power supply transformer (TC2),
• The CCM control module (A1),
• The control screen of the ICVC interface (A2). This is
the unique machine interface. Specifically it permits
consultation and configuration of the VFD,
• The pump (KM81) and heater (KM66) change-over
contactors,
• The overcurrent circuit breakers (QF--).
9.3.2 - The compressor power variable-frequency drive
The compressor power variable-frequency drive cabinet
includes the following functional components (identified in
accordance with the references on the wiring diagram):
Fig. 46 - Variable-frequency drive cabinet for machines with maximum nominal current up to 608 A
(19XR -506---912 and 19XR-506---922)
Fig. 47 - Variable-frequency drive cabinet for machines with maximum nominal current above 608 A
(19XR-506---802 and 19XR-506---812)
1.
Circuit breaker/main disconnect switch (QF101) for the following functions:
- short-circuit protection of the main circuit
- single connection point of the installation power cables
- isolation and shut-down of the machine, using the handle accessible on the
outside of the control box
- emergency stop, initiated by the PIC III control
2. Filter CEM RFI (ZGS) to limit high-frequency conductor interferences (>150
kHz).
3. Surge limiter (F).
4. Power supply circuit protection disconnect switch for the PIC III control box
(QF).
5. Power transformer (T1) and fuse (FU10) for the internal control circuit of the
variable-frequency drive.
6, Inductance inputs of the main circuit (LF).
7. Capacitor resistors (R1-3C) and coils for inlet filtering of the main circuit
8. Load resistors of the main power circuit (R4-6C) and protection fuses of the
load circuit (FU**). To limit the inrush current while power is supplied to the
variable-frequency drive
9.
10.
11.
12.
13.
Load resistor shunt capacitors (K1-). They short-circuit the load resistors when
the capacitors are loaded.
Power module and associated control interface board (GS) for the following
functions:
- compressor start-up and shutdown by voltage/frequency ramping to permit
limitating of the couple and inrush current at start-up
- control of the voltage/frequency applied to the compressor
- all electrical compressor protection devices
- all devices to protect against internal faults of the variable-frequency drive as
well as pressure safety switch cut-out and re-starting the oil pump
- report of variable-frequency drive status parameters and internal faults to the
PIC III control
Acquisition and measurement interface board (A3). Isolates and conditions the
voltage measuring and temperature signals reported to the power module
Communication gateway board. Provides the communication interface between
the variable-frequency drive and the PIC III control.
Internal cooling fan(s) (EV10-).
59
9.4 - General compressor speed control principles
The compressor speed is regulated by the control of the
voltage/frequency values applied to the motor. The voltage
applied, generated by pulse width modulation (PWM), is
proportional to the frequency.
Decreasing the compressor speed makes the machine more
susceptible to surging; the prevention and protection
algorithms against this phenomenon interact with the
control of the speed-vane couple.
Deviation of the water temperature parameters measured,
from the assigned “Control point” value and the“Chilled
water deadband” parameter is calculated in the “Guide Vane
Delta” parameter. This parameter leads to an adjustment of
the machine capacity by a simultaneous and coordonated
action on the guide vane opening and the compressor speed
(“Target VFD Speed”).
“Normal” operating mode: The capacity is primarily
controlled by the variation of the compressor speed within
the limits defined by the “VFD Minimum Speed” and
“VFD Maximum Speed” parameters (default settings 70
and 100%). If the capacity reduction objective permits, the
guide vane opening is maintained at 100%. If the“VFD
Minimum Speed” is reached, capacity reduction is obtained
by reducing the guide vane opening.
Operating mode to prevent surging: If the PIC III detects a
surge risk, the prevention logic requests an increase of the
compressor speed up to the risk zone outlet defined in the
dP-dT diagram. The capacity reduction is controlled by
reducing the guide vane opening.
Operating mode to protect against surging: Effective surging
is detected by the compressor motor current fluctuations.
In these conditions the compressor speed is increased. The
logic that requests the compressor safety shutdown in case
of prolonged surging is the same as the one for a standard
machine without variable-frequency drive. Please also
refer to the 19XR PIC III controls manual.
9.5 - Variable-frequency drive cooling
The power module of the variable-frequency drive is
equipped with a heat exchanger to provide cooling, using
the refrigerant in the machine. The PIC III control regulates
the temperature by ON/OFF change-over of the valve (35)
on the cooling pipes.
Attention: The typical diagram is not contractually
binding: refer to the machine PID.
The reading reported by the relative humidity sensor is
interpreted by the PIC III in order to maintain the temperature set point at a value that prevents condensation
formation in the power module.
Fig. 48 - Typical 19XRV unit diagram
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
60
FLASC chamber
Condenser water
Condenser
Condenser isolation valve
Transmission
Diffuser
Guide vane motor
Motor
Guide vanes
Impeller
Compressor
Cooling line isolation valve
Oil cooling
Oil filter
Oil pump
Stator
Rotor
Motor cooling valve
Linear float valve chamber
Filter drier
Orificed fitting
Moisture/flow indicator
Orificed fitting
Thermostatic expansion
valve (TXV)
Distribution pipe
Cooler isolation valve
Evaporator
Chilled water
Refrigerant liquid
Refrigerant vapour
Refrigerant liquid/vapour
Oil
Cooling line isolation valve
Heat exchanger, VFD
cooling
Solenoid valve, VFD
cooling control
9.6 - Flow detection by the saturated suction
temperature sensor
A temperature sensor in the suction line is used by the
PIC III control to check that the flow rate in the heat
exchanger is not zero.
If flow detection by measuring the presure differential in
the water circuit is active, the two verifications are carried
out in parallel and cumulated.
Please refer to the 19XR PIC III controls manual.
9.7 - Electrical specifications
Assigned conditional short-circuit current
Assigned operating current
Current draw at shutdown** .
Power supply frequency
Voltage range***
Power factor (values at nominal capacity)****
Cosine phi
Harmonic distortion index (THDI)
Electromagnetic emission rate****
10.3.2 - Weights and dimensions
The data in this section is for information only. The contractual data is given on the dimensional drawing supplied with
the machine. The weight of 19XRV machines is the same as
that of standard machines plus weight of the control boxes.
Control box, variable-frequency drive
19xr-506---912
19xr-506---922
19xr-506---802
19xr-506---812
19XRV machine dimensions are the same as for standard
machines; the height (only) is increased for machines
equipped with VFD control boxes 19XR-506---912 and
19XR-506---922.
Fig. 49 - Height of 19XRV with variable-frequency
drive - 19XR-506---912 and 19XR-506---922
50 kA rms
According to the variable-frequency drive
parameter set at the factory
< 32 A
50/60 (± 2) Hz
±10 %
> 0.97
> 0.99
< 5%
19xr-506---912: C3****
19xr-506---922: C3****
19xr-506---802: C3**** conducted emissions
C4* radiated emissions*
19xr-506---812: C3**** conducted emissions
C4* radiated emissions*
< 1000 m
Installation altitude
Cut-out frequency
Default factory control
4 kHz
Other possible control
2 kHz
Operating frequency range***
65 to 100%
Maximum capacity dissipated by the variable-frequency drive
6000 W
19xr-506---912
9000 W
19xr-506---922
19xr-506---802
12000 W
19xr-506---812
18000 W
* Emission level according to level C3+5 dB(µV/m)
** Continuous bus load
*** Around the nominal value
**** According to standard 61800-3; installation in an industrial environment
10 - 19XRV PIC III - INSTALLATION Instructions
AND ELECTRICAL CONNECTION
10.1 - Introduction
Control box weight, kg
750
750
1300
1300
Dimensions, machines equipped with VFD control box
Heat exchanger size
Height C, mm
3
2414
4
2501
5
2680
6
2721
7
N/A
8
N/A
N/AThese configurations (machine size and VFD size combination) are not possible.
19XRV machine dimensions are the same as for standard
machines; height and width are increased for machines
equipped with VFD control boxes 19XR-506---802 and
19XR-506---81.
Fig. 50 - Height of 19XRV with variable-frequency
drive - 19XR-506---802 and 19XR-506---81
19XRV machines are supplied with the electrical equipment
integrated, wired, pre-configured and tested at the factory.
The installation of the electrical equipment includes the
connection of customer auxiliary and communication power
supply cables, as well as configuration parameter adjustment specific to the installation site.
10.2 - Receiving the machine
During storage the machine must be protected against
humidity and dust. Specifically, the machine must not be
placed in an outside location, exposed to the weather.
10.3 - Physical data
10.3.1 - Unit rigging
Attention: The control box must not be used as a
machine rigging point.
The 19XRV machine rigging points are the same as those
for the standard machine without variable-frequency drive.
Refer to the dimensional drawing supplied with the machine.
Dimensions, machines equipped with VFD control box
Heat exchanger size
Height C, mm
Width B, mm
3
N/A
N/A
4
N/A
N/A
5
2908
2036
6
2959
2127
7**
3110
2920
8**
3161
3165
**
For these machines, the VFD is supplied, but not installed on the machine. The
dimensions given apply to the machine with the VFD installed.
N/AThese configurations (machine size and VFD size combination) are not possible.
61
10.4 - Location of connection points and interfaces
Refer to the dimensional drawings supplied with the machine.
10.5 - Electrical connections
10.5.1 - Power connections
19XRV units have only one power connection point,
located in the VFD control box.
Cable sizing is the responsibility of the installer and must
comply with the characteristics and regulations specific to
each installation site. The connections supplied as standard
for the incoming customer power cables on the circuit
breaker/main disconnect switch are designed to receive the
number and type of wire sections defined in the table below.
VFD for 19XRV Connectable wire sections
Quantity
Connection sections, mm2
19XR-506---912 3
95 to 240
19XR-506---922 3
95 to 240
19XR-506---802 4
50 to 300
19XR-506---812 4
50 to 300
Torque, N·m
34
34
42
42
Note: The use of flexible multi-standed conductors is possible, but care must be
taken to ensure that strands are not caught in the screw threads. The ends of the
conductors must be equipped with ferrules.
Before connecting the power cables (L1 - L2 - L3), ensure
that the sequence is correct.
10.5.2 - Report and control connections on site
For the site control wiring of the following elements refer
to the 19XR PIC III controls manual and the certified
wiring diagram supplied with the unit:
On the CCM board in the PIC III control box:
• Remote set point reset (4-20 mA), J5-3/4 CCM
• Demand limiter, J5-1/2 CCM
• Operating capacity percentage, J8-1/2 CCM
On the terminal strip in the compressor VFD cabinet:
• Safety shutdown, TB1-20/21
• Ice storage contact, TB1-21/22
• Remote start/stop button, TB1-23/24
• Condenser pump control, TB2-1/2
• Evaporator pump control, TB2-3/4
• Alarm report, TB2-9/10
10.6 - Equipment details
Safety consideration reminder: Disconnect the power supply
before working on the control box. The circuit breaker/
main disconnect switch allows isolation of the complete
electrical equipment from its power supply with the exception of the power conductor connection terminals for the
installation. Specifically, it disconnects the PIC III control
box.
62
Important
• Disconnecting the power equipment using the handle
of disconnect switch QF101 also disconnects the
control equipment and power supply to the oil pump.
To prevent compressor lubrication problems, do not
switch off the machine using the disconnect switch, if
the compressor is still energized.
• An emergency shutdown to protect the capacitor coils
can be initiated at any time by the control, while power
is supplied to the variable-frequency drive. This shutdown acts on the circuit breaker/main disconnect
switch.
Never apply voltage to the variable-frequency drive
that cannot be deenergized by the circuit breaker/main
disconnect switch: connection of 400 V voltage to the
variable-frequency drive must be upstream of the
circuit breaker/main disconnect switch. Specifically,
do not:
- connect a power supply bypass circuit upstream
of the secondary disconnect switch QF in the
VFD control box.
- connect a power supply bypass circuit upstream
of the control box and the PIC III control, if the
disconnect switch QF is conducting.
11 - 19XRV PIC III - before the initial start up
11.1 - Before energizing the unit
11.1.1 - Opening the VFD cooling line isolation valve
The three isolation valves installed on the VFD cooling
pipes must be open:
• Valves A and B located under the condenser
• Valve C located behind the VFD control box.
Fig. 51 - Location of the 19XRV isolation valves
11.1.2 - Wiring and installation inspection
For these checks the circuit breaker/disconnect switch of
the VFD control box must be on the open position.
Attention: Isolation using the main disconnect switch
does not disconnect the voltage upstream to the power
conductor connection terminals in the power supply to
the machine.
Check the electrical connections: tightening torques and
connector tightening on the electronic boards.
Checking the variable-frequency drive in the application:
• The nominal current and capacity data for the variablefrequency drive must be in accordance with the data
calculated for the machine in the application.
• Check that the voltage at the power connection
terminals of the machine complies with that on the
component name plates.
If documents are kept in the machine, they must be kept in
the document holder on the door. Specifically there must
not be any paper in the space below the power module, as
there is a risk that it may obstruct the cooling fan of the
power module.
11.2 - Start-up checks
Attention: The warranty conditions for the variablefrequency drive require that the first start-up is carried
out by a Carrier-authorized technician.
Observe the safety and connection requirements in chapters
8 and 10 of this document.
11.2.1 - Energizing the PIC control circuits and the crankcase
heater
The circuit breaker/disconnect switch QF101 and disconnect
switch QF located in the VFD control box must be closed
to carry out the following checks on these circuits. The
checks are the same as those for the standard machine.
11.2.2 - Quick test of the status LEDs
The status LED on the communication gateway and the
front face of the power module on each rectifier and the
chopper control board permit a quick check of the operation.
The LEDs on the communication gateway must be on as
follows:
• VFD status LED: green continuous or green flashing
• Module status LED: green continuous or green flashing
• NET A status LED: green continuous or green flashing
• NET A status LED: green continuous or green flashing
Refer to chapter 13.3 “Gateway communication module
status LEDs”.
11.3 - Control checks
11.3.1 - Variable-frequency drive application parameters
The parameter tables for the 19XRV machine are given in
the appendix of this document.
The variable-frequency drive parameters are set at the
factory. The controls can be checked and adjusted on the
ICVC.
The PIC III control permits configuration of the variablefrequency drive using the VFD_CONF table. A secret code
is required to access the parameter setting of the variablefrequency drive. It is different from that defined for access
to the other parameters of the PIC III control.
Menu ▶ Service ▶ Password (default 1111) ▶ VFD
CONFIG DATA ▶ Password (default 4444) ▶ CFD_CONF.
Specifically, the parameters below must be consistent with
the application.
Parameter
Motor nameplate voltage
Compressor 100% Speed
Rated Line Voltage
Rated Line Amps
Rated Line Kilowatts
Motor Rated load kW
Motor Rated Load Amps
Motor Nameplate Amps
Motor Nameplate RPM
Motor Nameplate kW
Value
Motor voltage at nominal speed (normally 400 V)
Compressor speed at the nominal machine operating
point (normally 50 Hz)
Nominal line voltage (machine supply, normally 400 V)
Line current draw of the machine at its maximum
operating point
Line power input of the machine at its maximum
operating point
Power input of the motor at the nominal machine
operating point
Current draw of the motor at the maximum machine
operating point and nominal speed
Nominal motor current or max. RLA
Nominal motor speed
Nominal motor capacity
Note: The other variable-frequency drive controls generally keep the default values.
The control parameters of the variable-frequency drive speed
by the PIC III control are accessible from the SETUP2 table:
Menu ▶ Service ▶ Password (default 1111) ▶ SETUP2.
The parameters for the variable-frequency drive application
must be added to the parameters configured for the standard
machine equipped with PIC II control:
Parameter
VFD Speed control
VFD Gain
VFD Minimum speed
VFD Maximum Speed
Value
Adjusts the response of the variable-frequency drive to a
speed modification demand
Lower limit of the authorised compressor speed range
Upper limit of the authorised compressor speed range
11.3.2 - Function test (quick test)
The following tests are added to the standard tests carried
out on the machine equipped with PIC II control:
• Relative humidity, in the CCM Pressure Transducer
menu: a humidity of 100% indicates a defective or
disconnected sensor.
• VFD cooling valve, in the Discrete Outputs menu.
Refer to the 19XR PIC III controls manual.
On the front face of the power module the LEDs must be
on as follows:
• Green LED: continuous
• Yellow LED: flashing
Refer to chapter 13.4 “Power module status LEDs”.
63
12 - 19XRV PIC III - initial start-up
Fig. 52 - 19XRV Communication gateway
12.1 - Motor rotation check
The variable-frequency drive will not start the motor, if the
phases connected upstream are reversed. The ICVC screen
reports an alarm; two of the three incoming phases must
be reversed.
The variable-frequency drive does not detect phase reversals
between variable-frequency drive and motor. The verification procedure described for the standard machine must
be used.
12.2 - Compressor start-up
At the start-up of the compressor, the variable-frequency
drive applies a frequency ramp, until the set point defined
by the parameter “VFD Start-up speed” is reached (default
100% of the value defined by “Compressor 100% Speed”).
The speed is reduced and the guide vanes open. The speed
and the guide vane opening are controlled by the procedure
described in chapter 9.4 of this document.
13 - 19XRV PIC III - operating mode
13.1 - Shutdown controlled by the machine
If compressor shutdown is requested, the variable-frequency
drive applies a decreasing voltage/frequency ramp until
the motor shuts down. The guide vanes are closed, and
then the oil pump shuts down. When the compressor shuts
down, the oil pump ensures post-lubrication.
Reminder: Do not stop the machine manually using the
main disconnect switch or by any means that are likely to
also disconnect the PIC control circuit and the power supply
to the oil pump.
Only emergency stops initiated by the machine control
must be used for this type of shutdown.
13.2 - Manual override commands
13.2.1 - Guide vane opening control
The opening of the guide vanes can be manually controlled
as for the machine without variable-frequency drive, as
described in the 19XR/19XRV controls manual.
13.2.2 - Compressor speed control
In the same way it is possible to manually control the motor
speed: the parameter “Target VFD Speed” can be modified
within the limits of the values defined by “VFD Minimum
Speed” and “VFD Maximum Speed” on the COMPRESS
screen of the ICVC. In this case the machine capacity is
controlled by the guide vanes.
13.3 - Gateway communication module status LEDs
The communication status between the ICVC and the
variable-frequency drive can be quickly checked with the
four status LEDs on the gateway. The potentiometer
controls must not be modified.
64
Item
1
2
3
4
Item
5
6
7
Status indicator Description
Variable-frequency Connection status of the control interface board of
drive
the power module
Communication
Connection status of the communication gateway
module
module
NET A
Status of the serial communication
NET B
?
Potentiometer control designation
Address #1 = 0
Communication speed = PGM
Address #2 = 1
Variable-frequency drive status indicator LED
Status
Cause
Corrective action
Off
The gateway has no supply - Check the connection of the
or has a poor connection
gateway to the power module.
- Energize the power module.
Red flashing
The gateway and the power - Check the connection of the
module are no longer
gateway to the power module.
recognised.
- Re-initialise the supply to the
power module.
Red continuous The power module has
IMPORTANT: Re-initialise the
refused a communication
power supply after having
from the gateway
carried out the action below:
Check that all control interface
board cables of the power module
are correctly connected.
- Check the bus cables.
Orange
There is a communication
protocol incompatibility
- Check that the connectors are
between the gateway and
well connected to the gateway.
the power module.
Green flashing
The communication is
Operation is normal
being established or
communication has
stopped.
Green
The gateway is correctly
As above
continuous
connected and communicates with the power module.
Gateway module status indicator LEDs
Status
Cause
Off
The gateway has no supply
or has a poor connection.
Corrective action
- Check the connection of the
gateway to the power module.
- Energize the power module.
Red flashing
Resettable fault.
Re-initialise the supply to the
power module. If there is no
improvement it may be necessary
to reload the firmware.
Red continuous The module has stopped the - Re-initialise the supply to the
material test.
power module.
- Replace the gateway.
Green flashing The gateway is operational. Operation is normal.
No communication in
progress.
Green
The gateway is operational
As above.
continuous
and currently communicating.
NET A and NET B communication status indicator LEDs
and
Status
Cause
Corrective action
Off
The gateway has no supply - Check that the connectors are
or has a poor connection.
well connected to the gateway.
- Energize the power module.
Red flashing
Communication error.
Re-initialise the supply to the
power module.
Red continuous
The gateway has detected - Check that the control
potentio-meters on the
an error that makes any
communication impossible. communication gateway are set
to their original control.
- Re-initialise the supply to the
power module.
Green flashing
Network connected. No
Operation is normal.
communication in progress.
Green continuous Communication in progress. As above.
13.4 - Power module status LEDs
The operating status of the variable-frequency drive can
be seen on the status LEDs on the front face of the power
module on the control interface board. The LEDs are
located on each rectifier and chopper control board.
The chopper status diagnostics are quickly carried out by
checking the corresponding status LEDs:
Colour
Green
Yellow
Red
Chopper: red
Rectifier: green
Status
Flashing
Continuous
Flashing
Description
12 V supply present. Ready to operate.
12 V supply present. Operating.
The variable-frequency drive is not ready to start,
as PIC shutdown command is present.
Continuous An alarm is present: check the return of the
variable-frequency drive status on the ICVC.
Flashing
A fault is present: check the return of the
variable-frequency drive status on the ICVC.
Continuous A fault is present that cannot be reset: check the
return of the variable-frequency drive status on
the ICVC.
Continuous The thyristor control circuit of the variable-frequency
drives has opened after a safety pressure switch
fault.
13.5 - Safety shutdowns and cuts
13.5.1 - Safety shutdown
The controlled safety shutdowns initiate a decreasing
voltage/frequency ramp until the motor shuts down.
In addition to shutdowns initiated as standard by the
machine, certain specific component faults are likely to
lead to a safety shutdown, if a variable-frequency drive as
used:
• Variable-frequency drive power fault
• Variable-frequency drive overheating
• Condensation formation on the cooling plate of the
variable-frequency drive
The faults detected in the variable-frequency drive can be
checked on the VFD_HIST screen of the ICVC.
13.5.2 - Emergency stop by the circuit breaker/main
disconnect switch
The emergency shutdown immediately opens the circuit
breaker/main disconnect switch. It can be initiated by
certain internal fault conditions at the variable-frequency
drive. Overvoltage faults on the power bus and earth current
leaks detected by the variable-frequency drive lead to an
emergency shutdown.
13.5.3 - Safety pressure switch cut-out
The opening of the safety pressure switch leads to the
disconnection of the 24 V power supply for the command
gates of the IGBT of the variable-frequency drive (Gate
Kill input on the power module): the motor shuts down
immediately following the power supply fault.
If there is a more general fault that affects the rectifier and
the chopper, the status diagnostics are displayed as shown
in the table below:
Colour
Red-green
Status
Alternate
flashing
Yellow/green/red Flashing,
repeating
pattern
Description
The firmware may be corrupt. Contact Carrier
Service.
RAM fault or the firmware may be corrupt.
Contact Carrier Service.
65
Fig. 53 - 19XRV Communication interface board
Location of the power module status LEDs for variable-frequency drives 19XR-506---912 and 19XR-506---922
Chopper status LEDs
Rectifier status LEDs
14 - 19XRV PIC III - MAINTENANCE
Safety consideration reminder: For the access conditions to
the variable-frequency drive control box refer to chapter 1
of this document.
14.1 - Special precautions during maintenance
14.1.1 - Isolation check
The voltages applied during tests with the unit energised
(isolation and dielectric) can damage the variable-frequency
drive.
When the motor isolation is checked, the power supply
conductors between the motor and the variable-frequency
drive must be disconnected.
14.1.2 - Disassembly and replacement of components in
the variable-frequency drive cabinet
Disassembly and replacement operations of parts in the
variable-frequency drive cabinet must be carried out by a
Carrier technician officially authorized and qualified to do
this work. This instruction must be observed to ensure that
the warranty conditions for the variable-frequency drive
are valid.
All connectors used on the electronic boards of the power
module are equipped with locks. Disconnection must be
easy by activating the unlocking mechanism.
66
14.2 - Periodic maintenance
14.2.1 - Standard maintenance
The normal maintenance operations for electrical equipment apply:
• Re-tightening of the electrical connections
• Elimination of dust
• Checking for signs of localised overheating.
14.2.2 - Variable-frequency drive cooling line
The variable-frequency drive cooling line includes a filter
that must be replaced once a year.
14.2.3 - Protection devices
Faults that occur on the functional components of the
variable-frequency drive cabinet are normally detected by
the control. For each reported fault, the diagnosis, the
possible causes and the corrective actions required are
described in the PIC III controls manual.
It is however not possible to obtain a fault report for the
destruction of the surge limiter (F) and the protection
fuses for the capacitor coils of the inlet filter (FU4/5/6).
Verification of these components is required at each
periodic maintenance visit.
APPENDIX: PARTICULARS OF 19XR PIC II UNITS WITH
INTEGRATED PROGRESSIVE ElectroniC STARTER
15 - Maintenance safety considerations
Access to low-voltage electrical equipment is dangerous
and can result in death or serious injury.
Personnel working on the control boxes must be qualified
to work on low-voltage installations in accordance with the
safety regulations applicable at the site. It must be authorized
for the work and familiar with the equipment and the
installation, as well as the instructions and safety measures
described in this document.
Never work on a unit that is energized.
Do not work on any electrical components, until the main
unit power supply has been switched off using the disconnect
switch(es) integrated into the control box(es).
During maintenance periods lock the power supply circuit
upstream of the unit in the open position.
Attention: The electronic starters that are used for
the 19XR control boxes normally have a delta connection
(square root of three installation). Depending on the wiring,
voltage is present at all motor terminals if the main
disconnect switch for the control box is in the ON position.
16 - Equipment presentation
16.1 - Environmental conditions
The operating and storage conditions are as those described
for the standard machine.
The machines must be installed inside the building. Control
boxes are protected against water projections to IP44 in
accordance with standard IEC60529-1: they are protected
against accidental and exceptional water projections from
any direction, without pressure.
16.2 - CE marking
The 19XRV electrical equipment is designed to ensure
machine conformity with all applicable European directives:
• Machinery directive 98/37/EC modified and low-voltage
directive 2006/90/EC:
The electrical equipment is designed and integrated in
accordance with the recommendations of European
standard EN60204-1
• European directive 2004/108/EEC (Electromagnetic
compatibility):
Conformity is assured by application of generic standards
61000-6-2 and 61000-6-4 that apply to industrial
applications.
16.3 - Description of electrical equipment elements
The standard components in the PIC control box and the
optional equipment present to ensure compressor start-up
and supply are located in a single control box.
The PIC control equipment includes (identified in accordance
with the references on the wiring diagram):
• The internal control circuit transformer (TC1) and the
oil heater (TC2) transformer,
• The CCM control module (A3),
• The interface control screen ICVC (A2).
• The compressor control and protection module ISM
(A1): it controls compressor start and stop, as well as
electrical and non-electrical protection devices:
- Monitoring of the current drawn: overcharge,
imbalance, leak current.
- Voltage monitoring: phase order, imbalance,
over-/undervoltage, micro cut-outs etc.
- It also ensures fault information reporting to the
PIC control: starter, safety pressure switch, oil
pump operation.
• The oil pump (KM81) and heater (KM66) changeover
contactors.
• The short-circuit protection breakers (QF).
The power equipment includes the following operational
elements:
• The circuit breaker/main disconnect switch QF101 for
the following functions:
- short-circuit protection at the main circuit.
- isolation and shut-down of the machine, using the
handle on the outside of the control box.
- emergency stop initiated by the PIC II control.
• The electronic Siemens starter 3RW44 (GS1) that
ensures functions, such as:
- compressor start and stop using voltage/frequency
ramping, permitting limitation of torque and
current draw at start-up.
- overheat or overcharge auto-protection.
- status report via dry contacts: ON/OFF, fault.
• The interface relay between the PIC power and control
equipment: start-up (K1), emergency cut-out (TRIP),
fault reporting (K4 ; K2).
• The emergency cut-out circuit transformer (TC4).
• The emergency cut-out relay (CTRL) in case of 115 V
power supply failure at the ISM board.
• The cooling fans of the control box (EV) regulated by
thermostat ST91.
• For details and the component location in the control
box refer to the wiring diagram supplied with the
machine.
67
16.4 - Soft starter operation
17.3 - Physical data
Compressor start and stop are controlled by the ISM (1CR
output).
17.3.1 - Unit rigging
When the start-up command is received, the starter controls
the power thyristors to initiate the power supply to the motor.
The voltage reduction obtained by chopping is controlled by
the starter to maintain the current at the value configured
in the starter.
Attention: If the limited current is configured at a
value that is too low, the mechanical torque supplied by
the motor does not allow it to start. It remains in the locked
rotor condition: the compressor does not start and the PIC
control generates an alarm.
At the end of the start-up process, an internal bypass
contactor at the starter is closed: the thyristors no longer
have power supply; the power supply to the motor is at full
voltage.
When shutting down, thyristors are again used to reduce
the motor voltage, until the motor is stopped.
16.5 - Control box cooling
The control box includes fans to keep the temperature
inside below a value of 50°C, that is used for the selection
of the electrical components. The fans are controlled by an
internal thermostat.
Power supply frequency
Voltage variation range around the nominal value in
continuous operation
Maximum voltage drop during starting
i.e. 85% of the nominal voltage set
Electromagnetic emission rate
(installation in an industrial environment)
Electromagnetic immunity rate
(installation in an industrial environment)
*
**
Max. machine RLA*
330% of max. motor
RLA by default**
50 Hz (± 2 Hz)
-10% to +10%
15% over 2 seconds
61000-6-4
61000-6-2
RLA value set at the machine PIC control and corresponding to the RLA of the
unit selection fiche.
or taken from the operating current values “Ie” and the current limitation “xIe”
set in the starter. See chapter 15.4.2.2.
17 - Installation instructions and electrical
connection
17.1 - Introduction
The electrical equipment is integrated, wired, pre-configured
and tested at the factory. On-site installation includes the
connection of customer auxiliary and communication power
supply cables, as well as configuration parameter adjustment specific to the installation site.
17.2 - Receiving the machine
During storage the machine must be protected against
humidity and dust. Specifically, the machine must not be
placed outside, exposed to the weather.
68
The 19XR/19XRV machine rigging points on units with a
starter are the same as those for the standard machine.
17.3.2 - Weight and dimensions
The weight of 19XR/19XRV machines with a starter is the
same as that of standard machines plus the weight of the
additional material to ensure the progressive start-up
function:
Additional machine weight (add to the weight of the standard machine)
Max motor RLA range, A
< 440
440 < < 630 630 < < 1350 1350 <
Compressor sizes
Control box weight, kg
2 and 3
200
3 and 4
220
4 and 5
290
5
330
The height of 19XR/19XRV machines with a starter is
increased compared to the standard machine without a
starter:
Modified machine dimensions for the electrical equipment
Heat excanger size
Height C, mm
Size 3
2130
Size 4
2300
Size 5
2480
Size 6
2580
Size 7
2980
Size 8
3020
17.4 - Location of connection points and interfaces
16.6 - Electrical specifications
Assigned conditional short-circuit current
Start-up current
Attention: The control box must not be used as a
machine rigging point.
Refer to the dimensional drawings supplied with the
machine.
17.5 - Electrical connections
17.5.1 - Power wiring connections
The units have only one power connection point.
Cable sizing is the responsibility of the installer and must
comply with the characteristics and regulations specific to
each installation site. The connections supplied as standard
for the incoming customer power cables on the circuit
breaker/main disconnect switch are designed to receive
the number of conductors defined in the table below.
Max. motor RLA range, A
< 250
250 < < 450
450 < < 800
1350<
Connectable number of connectors by phase
x1
x2
x3
x4
The connections are made on power rails drilled with
holes to take connectors with diameters M8, M10 or M12,
depending on the machine capacity.
Before connecting the power cables (L1 - L2 - L3), ensure
that the sequence is correct.
17.5.2 - Control wiring connections on site
For the site control wiring of the following elements refer
to the 19XR PIC controls manual and the certified wiring
diagram supplied with the unit:
On the CCM board:
• Remote set point reset (4-20 mA), J5-3/4 CCM
• Demand limiter, J5-1/2 CCM
Fig. 54 - Access to the motor terminals
Tunnel/connection box
Control box
Compressor power connections
On the ISM board:
• Alarm report, J9-16/15
• Machine power consumption, J8-1/2
• Ice storage contact, J2-3/4
• Safety shut-down, J2-1/2
• Chilled-water temperature reset, J5-3/4
• Evaporator hydronic pump control (obligatory),
J9-7/8
• Condenser hydronic pump control. J9-9/10
On the terminal strip:
• Remote start/stop button, 31/32
• Operation report, 130/131
• High-pressure control valve control and supply, 1A/1B;
1C/1D
• Remote control, 31/32
Example of the internal safety system
17.6 - Equipment details
17.6.1 - Isolation
Safety consideration reminder: Disconnect
the power supply before working on the control box.
The circuit breaker/main disconnect switch allows isolation
of the complete electrical equipment from its power supply
with the exception of the power conductor connection
terminals for the installation.
Important: Disconnecting the power equipment using
the handle of disconnect switch QF101 also disconnects
the control equipment and power supply to the oil pump.
To prevent compressor lubrication problems, do not switch
off the machine using the disconnect switch, if the compressor is still energised.
17.6.2 - “Square root of three” installation and access to
the motor terminals
In 400 V applications the starter is normally installed in a
delta branch of the compressor power supply circuit. This
configuration allows reducing the value of the current that
passes through the starter by a factor of √3.
With this type of wiring, if the power supply is not disconnected and the motor is de-energised, there is always voltage
present at the electrical motor terminals.
To warn and prevent people from working on the unit, a
locking system with a captive key is used to access the
motor terminals.
Access to the compressor terminals:
The control box element between the main control box and
the compressor is locked by a key. The key becomes captive
in the door, when this is open. Once the door is closed
again, the key must be put back in its place on the door
with the handle to operate the main machine switch. The
control box door cannot be closed and the disconnect
switch is again locked when the key has been put back in
its place.
18 - Before the initial start-up
18.1 - Wiring and installation inspection
For these checks the circuit breaker/disconnect switch of
the VFD control box must be in the open position.
Attention: Isolation using the main disconnect switch
does not disconnect the voltage to the power conductor
connection terminals in the power supply to the machine.
Check the electrical connections: tightening torques and
connector tightening on the electronic boards.
Checking the starter in the installation:
• The nominal current and capacity data for the starter
must be in accordance with the data calculated for the
machine in the application. If the starter is installed in
a delta branch of the motor (square root of three
installation), verification is done by a comparison with
the operating current of the starter multiplied by √3.
• Check that the voltage at the power connection
terminals of the machine complies with that on the
component name plates.
18.2 - Start-up checks
18.2.1 - Energising the PIC control circuits and the crankcase
heater
The circuit breaker/disconnect switch QF101 and disconnect
switch QF1 must be closed to carry out the following checks
on these circuits. The checks are the same as those for the
standard machine.
69
18.2.2 - Check the starter configuration
The starter configuration is set at the factory. It can be
checked and modified on the starter interface using the
four navigation keys:
OK
▲▼
ESC
To select the menu, modify the value or register the parameters.
To navigate in the menu or modify the values.
To exit the current menu and pass to the next higher menu.
The control procedure is described below with the default
parameter settings from the factory.
BEFORE ANY INTERVENTION: Authorise and lock
access to the advanced parameters:
To be set to
1000 or 1001
Selecting code 1000 gives access to the modification and
reading of all parameters. Selecting code 1001 gives limited
access to the modification and reading of the parameters.
Setting 1 - Display language
RW44/MENU/SETTING/SELECT/DISPLAY SETTING/
CHANGE/ENGLISH + CONFIRM OK
Setting 2 - Enter the motor parameters
RW44/MENU/SETTINGS/PAR. SET 1/MOTOR 1
Setting
Rated operating current
*
RW44/MENU/SETTINGS/MOTOR PROTECTION
Setting
Tripping class
Current asymmetry limit value
Prewarning limit tripping reserve
Prewarning limit motor heat build-up
Idle time
Pre-charge time
Protection against voltage failure
Temperature sensor
Accept
To be set to
CLASS 10
50 %
0 ms
95 %
Deactivated
60 s
Yes
Deactivated
Yes
Setting 9 - Control save settings
RW44/MENU/SETTING/SAVING OPTIONS
RW44/MENU/SAFETY
Setting
Enter user code
Setting 6 - Motor protection
To be set to
Machine RLA*
RLA set at the machine PIC control and corresponding to the RLA of the
machine selection card.
Setting
Save settings
Accept
To be set to
OK
Yes
Notes about the control values
• The parameter for the start-up current limitation can
be slightly adjusted, if required: refer to chapter 19.2.
• The starter is equipped with motor protection functions
that are not used: motor protection is controlled by
the PIC control. The starter parameter controls are
adjusted to ensure that the PIC control has priority
for the motor protection.
18.3 - PIC control checks
18.3.1 - Parameter setting
The standard machine parameter setting applies. For the
list of all parameters and their default values please refer
to the PIC III Controls IOM.
Setting 3 - Start-up
18.3.2 - Function test (quick test)
The standard machine tests apply.
RW44/MENU/SETTINGS/PARAMETER SET 1/
STARTING SETTINGS
19 - Initial start-up
Setting
Starting mode
Start voltage
Starting time
Maximum starting time
Current limiting value
Breakaway voltage
Breakaway time
*
To be set to
Voltage ramp + current limiting
50%
5 seconds
10 seconds
330 x RLA max/Ie*
80%
0 ms
RLA max is the value on the compressor name plate, “Ie” is the value defined
for setting 2.
Setting 4 - Inputs
RW44/MENU/SETTINGS/INPUTS
Setting
Input 1 - Action
Input 2 - Action
Input 3 - Action
Input 4 - Action
To be set to
Motor right PS1
No action
No action
Trip reset
Setting 5 - Outputs
RW44/MENU/SETTINGS/OUTPUTS
Setting
Output 1 - Action
Output 2 - Action
Output 3 - Action
70
To be set to
On time motor
Operation/bypass
Group warning
19.1 - Motor rotation check
The verification procedure for the standard machine must
be used. If the phases are reversed it is possible that the
starter detects the fault before the PIC control. In this case
an alarm indicating a rotation fault will appear on the
starter and not on the PIC control. The order of the phases
connected to the starter needs to be reversed.
19.2 - Compressor start-up and starter control
adjustment
When the compressor is started up, the starter controls the
voltage applied to maintain the configured current (see
chapters 16.4 and 18.2.2).
The current limitation value set as the default is selected to
ensure certain motor starting. This value can be reduced
during the first start-up by adjusting the current limitation
value parameter configured in the starter:
• It is recommended not to reduce the parameter to a
value that corresponds to less than 45% of the LRDA
motor current.
• Motor start-up must be immediate, without any howling
noise that indicates that motor rotation was not initiated.
• Measuring the start-up current must confirm that the
effective start-up time is not more than five seconds.
20 - Operation
20.1 - Machine shut-down
Machine shut-down is controlled in the same way as for
the standard machine.
When the compressor shuts down, the oil pump ensures
post lubrication.
Do not manually shut down the machine using the main
disconnect switch or by any method that is likely to also
result in shutting down the PIC control circuit and the oil
pump power supply.
20.3 - Reset after a fault
Starter input 4 (reset) is connected in parallel with input 1
(start command). In this way the starter faults must be
re-initialised at each start-up demand. If this automatic
reset does not work, it may be necessary to carry out a
manual reset:
1. Disconnect inputs IN1 and IN4 at the starter.
2. Install a jumper between terminals L+ and IN4 of the
soft starter.
3. Apply power and check on the display that the alarm
has disappeared.
4. Disconnect the jumper installed in step 2 - then
reconnect inputs IN1 and IN4 at the starter.
21 - Maintenance
21.1 - Isolation check
The voltages applied during tests with the unit energised
(isolation and dielectric) can damage the starter.
When the motor isolation is checked, the power supply
conductors between the motor and the starter must be
disconnected.
21.2 - Periodic maintenance
The normal maintenance operations for electrical equipment apply:
• Re-tightening of the electrical connections
• Elimination of dust
• Checking for signs of localised overheating.
Only emergency shut-downs initiated by the machine
control must be used to carry out this type of shut-down.
20.2 - Fault diagnosis
If the factory-set parameters are kept, the starter is not
likely to generate motor protection alarms. These are
generated by and can be checked on the PIC control.
Internal starter fault and faults relating to its power supply
and control circuit are however generated at starter level.
In this case a fault information is reporteed to the PIC
control.
A "STARTER FAULT" indicates the problem on the PIC
display. The diagnosis must now be made by consulting the
messages displayed on the starter screen. Refer to the
manual for starter 3RW44.
NOTE: An emergency shut-down initiated by the PIC
control will automatically generate a starter fault, indicating
voltage loss at the main power circuit.
71
Order No: 11989-76, 07.2011 - Supersedes order No: 11989-76, 12.2009 + 11997-76, 06.2004.
Manufacturer: Carrier SCS, Montluel, France.
Manufacturer reserves the right to change any product specifications without notice.
Printed in the European Union.
The images in this document are for illustrative purposes only and are not part of any offer for sale or contract.