Trane CGWF SE Owner's manual

Co
September 2021CG-SVX049D-GB
Original instructions
Installation
Operation
Maintenance
CGWF SE – CGWF HE – CXWF
Indoor water-cooled chillers and water/water heat pumps with scroll
compressors and Symbio™ 800 controller
CGWF SE - Cooling capacity 50-700 kW
CGWF HE - Cooling capacity 55-700 kW
CXWF - Heating capacity 60-835 kW (reversible on water side)

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Contents
1 OVERVIEW 4
2 SAFETY 4
3 OPERATING LIMITS 9
4 INSTALLATION 11
5 ACOUSTIC PROTECTION 16
6 ELECTRICAL POWER SUPPLY 16
7 WATER CONNECTIONS 18
8 REFRIGERANT SCHEME 52
9 ELECTRICAL PANEL AND ELECTRICAL DATA 54
10 OPERATOR RESPONSIBILITIES 57
11 START-UP PRELIMINARY PROCEDURES 57
12 CHECK LIST – MANDATORY OPERATION CONTROL BEFORE START-UP 58
13 START-UP 64
14 MAINTENANCE 66
15 RECOMMENDED SPARE PARTS 69
16 TROUBLESHOOTING 70
17 IMPROPER USE 72

1OVERVIEW
1.1 FOREWORD
The instructions are given as a guide to good practice in the installation, start-up, operation, and maintenance by the
contractor or end-user of a CGWF chiller or CXWF heat pump unit. It does not contain full service procedures necessary for the
continued successful operation of this equipment. The services of a qualified technician should be employed through the medium of
a maintenance contract with a reputable service company. Read this manual thoroughly before unit start-up.
1.2 WARRANTY
Warranty is based on the general terms and conditions of the manufacturer. The warranty is void if the equipment is repaired or
modified without the written approval of the manufacturer, if the operating limits are exceeded or if the control system or the
electrical wiring is modified. Damage due to misuse, lack of maintenance or failure to comply with the manufacturer’s instructions or
recommendations is not covered by the warranty obligation. If the user does not conform to the rules of this manual, it may entail
cancellation of warranty and liabilities by the manufacturer.
1.3 RECEPTION OF THE UNIT
On arrival, inspect the unit before signing the delivery note. Specify any visible damage on the delivery note, and send a registered
letter of protest to the last carrier of the goods within 7 days of delivery.
Notify the local TRANE Sales office at the same time. The delivery note must be clearly signed and countersigned by the driver.
Any concealed damage shall be notified by a registered letter of protest to the last carrier of the goods within 7 days of delivery.
Notify the local TRANE sales office at the same time.
Important notice: No shipping claims will be accepted by TRANE if the above mentioned procedure is not respected.
For more information, refer to the general sales conditions of your local TRANE sales office.
Note: Unit inspection in France. Delay to send registered letter in case of visible and concealed damage is only 72 hours
1.4 FACTORY INSPECTION
Trane units are inspected in the factory, in appropriate areas, in accordance with internal procedures. Each performance
test carried out on the unit is possible only if the same conditions are reproduced and maintained (charge consistency,
constant temperature and evaporation - condensation and recovery capacity, quality and tolerance of the measuring
instruments etc.) in the test rooms.
The inspection conditions are those indicated by the customer in the ordering phase: if not otherwise specified, reference
should be made to the nominal performance indicated in the technical bulletin in force at the date of the Confirmation of
the Order.
1.5 MAINTENANCE
It is strongly recommended that you sign a maintenance contract with your local Trane Service Agency. This contract
provides regular maintenance of your installation by a specialist in our equipment. Regular maintenance ensures that any
malfunction is detected and corrected in good time and minimizes the possibility that serious damage will occur. Finally,
regular maintenance ensures the maximum operating life of your equipment. We would remind you that failure to respect
these installation and maintenance instructions may result in immediate cancellation of the warranty.
2SAFETY
All units are designed, built and inspected in compliance with Pressure Equipment Directive (PED97/23/EC or 2014/68/EU and EU
Directive 2006/42/EC.
To avoid death, injury, equipment or property damages the following recommendations should be respected during maintenance
and service visits:
1. The maximum allowable pressures for system leak testing on low and high pressure side are given in the chapter “Installation”.
Insure to do not exceed test pressure by using appropriate device
2. Disconnect all power supplies before any servicing on the unit
3. Service work on the refrigeration system and electrical system should be carried out by qualified and experienced personnel
4. To avoid any risk, place the unit in an area or technical room with restricted access
2.1 DEFINITIONS
Owner:
The legal representative of the company, body or natural person who owns the plant in which the Trane unit is installed:
he or she is responsible for the control and respect of all the safety regulations indicated in this manual as well as the
national ones in force.
Installer:

Page 5
The legal representative of the company appointed by the owner to position and hydraulically, electrically etc. connect the
Trane unit to the plant: he or she is responsible for moving and the correct installation of the unit in accordance with the
indications in this manual and with the national regulations in force.
Operator:
A person authorized by the owner to carry out all the operations of regulation and control on the Trane unit which are
specifically mentioned in this manual. He or she should keep to actions described in the manual and limit his or her action
to what is explicitly allowed.
Technician:
A person who is directly authorized by Trane or, secondarily, for all EU countries except for Italy, by the distributor of the
Trane product, under their own responsibility, to carry out all ordinary or extraordinary maintenance operations, as well as
regulations, controls, repairs and parts replacement which may be necessary during the lifetime of the unit.
2.2 ACCESS TO DANGEROUS AREA
Access to the unit dangerous areas is usually obstructed through protection panels, which are removable, by using a tool.
For all the units which allow access to the cooling piping without security gratings (optional) or closing panels, the
following precautions must be taken:
- mark the areas with contact risks
- apply warning signs
The danger zone must be of a suitable size to avoid any contact, even accidental contact.
Trane declines any responsibility for damage to things and unauthorized personnel in case of absence of clear and static
limiting systems of the risk area(s) and of the relevant warning and danger signs.
2.3 GENERAL PRECAUTIONS
The operator must only intervene on the unit commands; he or she must not open any panels except for the one which
gives access to the command module.
The installer must only intervene on the connections between the plant and the unit; he or she must not open any unit
panels nor carry out any commands.
The following precautions should be made when approaching or working on the unit:
• Do not wear jewelry, baggy clothes or any other accessory which can get caught up.
• Use appropriate protection (gloves, glasses etc.) when using an open flame (welding) or compressed air.
• If the unit is located in a closed environment, wear hearing protection.
• Before disconnecting, removing tubes, filters, joints or other line parts intercept the connection tubes, empty them
until the pressure reaches that of the atmosphere.
• Do not use your hands to check for possible pressure losses.
• Always use tools which are in good condition; make sure the instructions have been fully understood before using the tools
• Make sure that any tools, electrical cables or other loose objects have been removed before closing the unit and
starting it up again.
2.4 PRECAUTIONS AGAINST RISKS DUE TO THE REFRIGERANT
Safety data
Toxicity
Not important
Risks for skin touching
Splashes or sprinkles can cause chill burns. The risk of absorptions through the skin is not relevant.
The
R410a refrigerant could take some lightly irritating effects and in liquid stage it has a strong skinning effect. In this case it is
necessary to rinse with fresh water the contaminated parts of the skin
The
refrigerant in liquid stage in contact with wet fabrics cause freezing and adherence to the skin. In this case it is necessary to
put off the contaminated clothes to avoid freezing. Please contact a doctor in case of irritation of the contaminated parts.
Risks for contact with the
eyes
Vapors don’t take any effect. Splashes or sprinklers can cause chill burns. In those cases it is necessary to
rinse
the eyes with water or with solution for ocular washings for 10 minutes. The intervention of a doctor is needed.
Risks for ingestion
Should it happen, it causes chill burns. It does not cause vomiting. The person must be kept awake. It is needed to rinse the
mouth with fr
esh water and to drink almost 0.25 liters. The intervention of a doctor is needed.
Risks for inhalation
High concentration of vapors in air can lead to an
esthetic effects up to a loss of conscience. Long exposures could give
rise to cardiac arrhythmia and sometimes even to death.
High concentrations can create a reduction of oxygen in air, with consequent possibility of suffocation. Should it happen the
person must be taken to the open air and let him take a rest.
Administer oxygen if needed. In case the breathing has
interrupted or become irregular, it is necessary to
apply the artificial breathing. In case of cardiac arrest a heart massage must be applied. Contact a doctor immediately.

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Conditions to avoid
Use in presence of
exposed flames, and of high levels of humidity.
Dangerous reactions
Possibility of violent reactions with the sodium, the potassium, the barium and with other alkaline substances,
incompatible materials and all the alloys containing more than 2% of
magnesium.
Protection wearing
-
Behavior in case of losses
or escapes
Wear protection apparel and self
-rescuer respirators. Insulate the source of the loss, if this operation can be done in safety conditions.
Small quantitative of refrigerant escaped at liquid state can be allowed to evaporate only if the room is well ventilated. In
case of great
losses ventilate the room immediately. Plug the loss with sand, so
il or other absorbent material; avoid that the liquid refrigerant can
enter in water
-drainages or losing pools.
Dismantlement
The best procedure is the recovery and the recycle. If this is not possible the refrigerant must be conferred to an accredite
d system
for its destruction in order to neutralize acid and toxic by
-products.
2.5 PRECAUTIONS AGAINST RESIDUAL RISKS
Prevention from risks due to the command system
• make sure the instructions for use have been understood before carrying out any work on the control panel.
• always keep the instruction manual close at hand when working on the control panel.
• start up the unit only after having certified that it is correctly connected to the plant.
• inform the technician promptly of any alarms which appear on the unit.
• do not reset the alarms to manual restart without having first identified the cause and removed it.
2.6 PREVENTION AGAINST RESIDUAL MECHANICAL RISKS
• install the unit in accordance with the provisions of the following manual.
• carry out all the maintenance operations provided for by this manual regularly.
• wear a protective helmet before entering inside the unit.
• before opening a unit panel make sure that it is firmly connected by means of a hinge.
• do not touch the air condensation batteries without having first put on protective gloves.
• do not remove the protections to the moving parts while the unit is running.
• before restarting the unit make sure that the moving part protections are in the correct position.
2.7 PREVENTION AGAINST RESIDUAL ELECTRICAL RISKS
• connect the unit to the mains in accordance with the provisions of this manual.
• carry out all maintenance operations regularly.
• before opening the control panel disconnect the unit from the mains by means of the external knifeswitch.
Warning: It must be taken into account especially that when soft starters instead of contactors are installed as
compressors drives, one phase of any compressor remains live when the compressor is off but the main switch is closed.
Do not access the compressor electrical box.
• check that the unit has been earthen correctly before starting it up.
• control all the electrical connections and the connection cables paying particular attention to the state of isolation; replace
the cables which are clearly worn or damaged.
• carry out periodic checks of all wiring inside the panel.
• do not use cables with an inappropriate section or flying connections not even for a limited period or in anemergency.
2.8 PREVENTION AGAINST RESIDUAL RISKS OF A DIFFERENT NATURE
• the residual risks due to pressure are mainly coming from a failure of the safety devices. To prevent them it is
necessary to check and replace them when required
• carry out the plant connections to the unit by following the indications reported on the following manual and on the
panels of the unit itself.
• if a part is disassembled, make sure that it is correctly reassembled before restarting the unit.
• do not touch the discharge line of the compressor, the compressor itself or any other tube or component which is inside the unit
without putting on protective gloves.
• keep a fire extinguisher which is able to put out fires on electrical equipment near the unit.
• in the event of fire either if it originates on the unit or near it make sure the power supply to the unit is promptly cut and that any
person who might be near the unit at that moment is moved to a secure location.
• on units installed inside, connect the refrigerant circuit shut off valve to a network of tubes which are able to lead the possible
spillage of refrigerating fluid outside.
• eliminate any fluid loss inside or outside the unit.
• collect the discharge liquid and clean up any possible oil leakage.
• periodically clean the compressor casing of the accumulated dirt deposits.
• do not keep inflammable liquids near the unit.
• do not dispose of the refrigerant fluid and the lubricating oil in the environment.
• welding should only be carried out on empty tubes; do not approach the tubes containing refrigerant fluid with flames or other
sources of heat.
• do not bend or strike tubes containing pressurized fluids

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2.9 PRECAUTIONS TO BE OBSERVED DURING MAINTENANCE OPERATIONS
Only authorized technicians may carry out maintenance operations. Before carrying out any maintenance the
following must beperformed:
• isolate the unit from the mains electricity by using the external knife switch.
• place a notice on the external knife switch which says “do not use - maintenance in progress”.
• make sure that any possible on-off commands are disabled.
• use appropriate safety equipment
If measurements or controls must be carried out which require the unit to be running the following observations must be followed:
• operate with the electrical panel open for as short a time as is possible.
• close the electrical panel as soon as the individual measurement or control has been carried out.
• for units which are located outside, do not carry out interventions in dangerous atmospheric conditions like rain, snow, fog etc..
The following precautions should also be taken at all times:
• never dispose of fluids contained in the refrigerant circuit into the environment.
• when replacing the electronic card always use appropriate equipment (extractor, anti-static bracelet, etc.).
• if a compressor, the evaporator, or any other heavy part is to be replaced, make sure that the lifting equipment matches the
weight to be lifted.
• if the unit has an independent compressor compartment, do not open the ventilator compartment without having first
isolated the unit using the knife switch on the side of the panel and only after having placed a sign which says “do not use
- maintenance in progress”.
• if modifications must be carried out to the cooling, hydraulic or electrical circuit of the unit, as well as to its command
logic, contact Trane .
• if particularly complicated assembly or disassembly operations are to be carried out contact Trane .
• always use original spare parts bought directly from Trane or from official dealers of the companies reported in the list
of recommended spare parts.
• if the unit is to be moved after a year of being in the site or if it has to be dismantled contact Trane .
IMPORTANT: No high pressure safety valve is installed on the unit.
The unit fail safe is assured by cut-out of the electrical power supply to the coils of the
compressors contactors. The cut-out action is carried out by the electrical contact of a
dedicated high pressure switch.
No Schrader valve is installed in the service socket the circuit high pressure switch is screwed
into. This implies that the replacement of the high pressure switch requires that the relevant
refrigerant circuit has been discharged of all the refrigerant inside it.
Figure 1 – Indicative position of the signs warning about the necessity
of replacing the high pressure switches with the unit void of refrigerant

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2.10 MANUAL ALARM RESET
If there is an alarm the unit must not be manually reset before having located and eliminated the root cause of the fault.
Repeated manual resets may cause the warranty to become void.
DO NOT PULL OUT THE HIGH PRESSURE SWITCHES (ONE PER REFRIGERANT CIRCUIT) IF THE UNIT
IS NOT COMPLETELY VOID OF REFRIGERANT. FAILURE TO FOLLOW THIS INSTRUCTION COULD
RESULT IN DEATH OR SERIOUS INJURY

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CGWF SE / CGWF HE / CXWF
3OPERATING LIMITS
3.1 STORAGE
The units can be stored within the following environmental conditions:
Min ambient temperature : -10°C
Max ambient temperature : 53°C
Max relative humidity : 95% not condensable
CAUTION: The storage in a very high humidity space (condensation) can damage electronic components.
CAUTION: The CGWF SE / CGWF HE / CXWF units are intended only for indoor usage and storage.
If they are installed in a machinery room they must be installed within the meaning of the EN 378-3 Standard.
Should the unit be stored outdoor it is customer’s duty to implement any device aimed to protect the unit
from the harsh weather effects.
3.2 OPERATING LIMITS
Unit operation is permitted within the limits indicated in the operating map provided in 3.3.
CAUTION: Operation outside the specified limits may cause the activation of the protections and disrupt the
operation of the unit and, in extreme cases, damage the unit. In case of doubt please consult Trane Service
department.
The operating limits shown in 3.3 apply to units operating at full load.
3.3 OPERATING MAP
*LWT = Leaving water temperature
IMPORTANT: A pressure switch cutting directly the power supply to the coils of the compressors
contactors prevent refrigerant from reaching dangerously high pressure values. No safety valve is
installed on the unit.
Glycol
EVAPORATOR LWT, °C
CONDENSER LWT, °C

Page 10
ETHYLENE GLYCOL CORRECTION TABLE
% Ethylene glycol weight
10%
15%
20%
25%
30%
35%
Lowest outlet water temperature
Suggested security limit Cooling
capacity coefficient
Power input coefficient
Flow rate coefficient
Pressure drop coefficient
°C 4 2 0 -2,8 -6 -10
°C 1 -1 -4 -6 -10 -14
- 0,99 0,985 0,981 0,977 0,974 0,971
-
0,993
0,99
0,988
0,986
0,984
0,982
- 1,04 1,05 1,07 1,08 1,09 1,11
- 1,11 1,17 1,23 1,31 1,39 1,47
In order to calculate performance with glycoled solutions multiply main sizes by respective coefficients.
GLYCOL PERCENTAGE DEPENDING ON FREEZINGTEMPERATURE
% glycol according to the freezing temperature
Freezing temperature 0°C -5°C -10°C -15°C -20°C -25°C
% Ethylene glycol
Flow rate coefficient
5% 12% 20% 28% 35% 40%
1,02 1,04 1,07 1,09 1,11 1,13
In order to calculate performance with glycoled solutions multiply main sizes by respective coefficients.
IMPORTANT:
An oversized water pump seal is required for operation with glycol >25%.
Contact your local Trane Sales Office for more information.

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4INSTALLATION
4.1 MOVING AND POSITIONING THE UNIT
The units have been designed to be lifted from above by means of eyebolts and holes in the base frame .
Use retractor bars to keep the lifting wires or chains away from the unit.
Figure 2 - Correct lifting procedure for platform 1 units
(CGWF SE sizes from 050 to 090, CGWF HE sizes from 055 to 095
and CXWF sizes from 060 to 110)
Figure 3 - Correct lifting procedure for platform 2 units
(CGWF SE sizes from 110
to 235
, CGWF HE sizes from 110
to 155 and CXWF sizes from 125 to 175)

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Figure 4 -
Figure 5 -
Correct lifting procedure for platform 3 units (sizes with two refrigerant
circuits - CGWF SE sizes from 115 to 475, CGWF HE sizes from 115 to
500 and CXWF sizes from 130 to 565)
Correct lifting procedure for platform 4 units (sizes with
two refrigerant circuits - CGWF SE sizes from 555 to 700,
CGWF HE sizes from 585 to 700 and CXWF sizes from
670 to 835)

Page 13
Lifting procedures provided with the unit have to be respected.
CAUTION
Do not use forklift trucks to lift the unit from below.
If equipment for lifting from above is not available, using rollers may move the unit.
The surface on which the unit is placed must be flat and strong enough to withstand the weight of the unit while running.
In order to reduce the transmission of vibrations to the supporting structures, fit shock absorbers in every fastening point.
Rubber shock absorbers are recommended for units installed on the ground, spring shock absorbers for units installed on
roofs. Open spaces around the unit must be provided for in order to allow normal maintenance to be carried out.
IMPORTANT: Make sure that during transport the unit ALWAYS remains in the correct position!
Horizontal positioning of the unit can lead to irreversible damage to the compressors.
Damage arising from incorrect transport will not be under warranty by the manufacturer.
Immediately report an incorrect receipt of goods.
An arrow positioned upward indicates the vertical position of the unit.

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4.2 MINIMUM SPACE REQUIREMENTS
Dimensional drawing shall be respected to avoid difficult maintenance or inaccessibility to components
The following drawings are views from under the units:
Figure 7 - minimum space requirements [mm]
for
platform 2 units (Correct lifting procedure for units with
size 2 frame
( CGWF SE sizes from 110 to 150 - CGWF
HE sizes from 110 to 155
– CXWF sizes from 125 to 175)
Figure 6 - minimum space requirements [mm] for platform
1 units
(CGWF SE sizes from 050 to 090 – CGWF HE
sizes from 055 to 095 - CXWF sizes from 060 to 110)
Figure 8 - minimum space requirements [mm] for platform
3 units (sizes with two refrigerant circuits
- CGWF SE
sizes from 115 to 475, CGWF HE sizes from 115 to 500
and CXWF sizes from 130 to 565)

Page 15
CAUTION:in case two units have to be installed side by side, the distance of respect must be doubled.
After the unit has reached the final position, fix the anti-vibration bolts.
4.3 CONTROL OF COMPRESSOR FASTENING
Compressors are fitted on shock absorbers. For fixing through spring anti-vibration mounts, remove
blockages put to fasten the compressors, as indicated on the label on compressors body.
Side of the unit that can be placed next to the wall. This means that with the unit at a distance less than the
optimal one of 700 mm the accessibility to some components is worse but in any case is ensured even if the
unit is leaning against the wall.
Figure 9 - minimum space requirements [mm] for
platform 4 units (sizes with two refrigerant circuits
-
CGWF SE sizes from 555 to 700, CGWF HE sizes
from 585 to 700 and CXWF sizes from 670 to 835)

Page 16
5ACOUSTIC PROTECTION
For maximum isolation effect, water lines and electrical conduit should also be isolated. Wall sleeves and rubber
isolated piping hangers can be used to reduce the sound transmitted through water piping. To reduce the sound
transmitted through electrical conduit, use flexible electrical conduit. EU and Local codes on sound emissions should
always be considered. Since the environment in which a sound source is located affects sound pressure, unit
placement must be carefully evaluated. Consult an acoustical engineer for critical
connections.
6ELECTRICAL POWER SUPPLY
The mains power supply characteristics have to match the unit’s absorption. The mains power supply tension must
correspond to the nominal value ± 10%, with a maximum difference between the phases of 2%.
All power supply wiring must be sized and selected accordingly by the project engineer in accordance with standard IEC
60364. All wiring must comply with local code.
6.1 POWER CONNECTIONS
Protect the unit electric box power supply circuit with protection devices (not included in the supplied
equipment). Connect the line terminals with a three-core cable of a section which is appropriate to the unit
absorption. The switch and the fuses like all the power connections must comply with the regulations in force.
6.2 IMBALANCE BETWEEN THE SUPPLY TENSION PHASES
Do not run the electrical motors when the voltage unbalance between the phases is more than 2%.
Use the following formula to check:
% Imbalance = [(Vx – Vave) x 100/Vave]
Vave = (V1 + V2 + V3)/3
Vx = phase with greatest difference from Vave (without
regard to the sign)
IMPORTANT: If the mains voltage has an imbalance of above 2%, contact the company, which distributes the electrical
energy. If the unit functions with a unit voltage imbalance between the phases of above 2% the warranty is invalid.
6.3 UNIT VOLTAGE PHASING
It is important that proper rotation of the compressors be established before the unit is started. Proper motor
rotation requires confirmation of the electrical phase sequence of the power supply. The motor is internally
connected for clockwise rotation with the incoming power supply phases A-B-C.

Page 17
6.4 MAIN SWITCHES FEATURES
UNIT SIZES
CGWF SE
CGWF HE
CXWF
Poli
Ampere
Type
50
55
60
3P
80 A
OT80F3
60
60
70
3P
80 A
OT80F3
65
70
80
3P
80 A
OT80F3
80
85
95
3P
100 A
OT100F3
90
95
110
3P
100 A
OT100F3
110
110
125
3P
100 A
OT100F3
125
130
145
3P
100 A
OT100F3
135
140
160
3P
125 A
OT125F3
150
155
175
3P
125 A
OT125F3
170
\
\
3P
160 A
OT160G03
190
\
\
3P
160 A
OT160G03
215
\
\
3P
160 A
OT160G03
235
\
\
3P
200 A
OT200E03
115
115
130
3P
160 A
OT160G03
120
125
140
3P
160 A
OT160G03
130
135
155
3P
160 A
OT160G03
155
160
180
3P
160 A
OT160G03
185
190
215
3P
160 A
OT160G03
210
220
255
3P
200 A
OT200E03
245
255
290
3P
200 A
OT200E03
270
285
320
3P
250 A
OT250E03
290
310
350
3P
250 A
OT250E03
340
350
400
3P
250 A
OT250E03
375
395
450
3P
315 A
OT315E03
420
450
510
3P
400 A
OT400E03
475
500
565
3P
400 A
OT400E03
555
585
670
3P
630 A
OT630E03
610
635
725
3P
630 A
OT630E03
660
680
785
3P
630 A
OT630E03
700
700
835
3P
630 A
OT630E03

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7WATER CONNECTIONS
7.1 EVAPORATOR
The connections schemes relating to evaporator are featured in the paragraph 7.5 HYDRAULIC VERSIONS.
The connection tubes have to be supported adequately in order that their weight does not damage the plant.
It is necessary that the water flow rate to the unit is compatible with the evaporator one. It is also necessary that the water
flow rate is kept uniform while the unit is running: it is suggested to use always a pump system dedicated to the unit and
independent from the remaining part of the plant.
Before stalling units with temperature around 0°C please evacuate the exchanger with compressed air in order to avoid
breakings due to ice.
If the unit is installed in order to replace another, the entire hydraulic system must be emptied and cleaned before
the new unit is installed. Regular tests and proper chemical treatment of water are recommended before starting up
the new unit.
In the event that glycol is added to the hydraulic system as anti-freeze protection, pay attention to the fact that
intake pressure will be lower, the unit’s performance wil be lower and water pressure drops will be greater. All unit-
protection methods, such as anti-freeze, and low-pressure protection will need to be reset. Before insulating water
piping, check that there are no leaks.
Evaporator
nominal pressure (PN) = 16 bar.
CAUTION: Install a mechanical water filter at the water inlet of each evaporator heat exchanger and of each condenser
heat exchanger as featured in paragraph 7.5 HYDRAULIC VERSIONS.Failure to install the filter allows access of solid
particles and/or welding slag inside the heat exchanger. We recommend the installation of a filter having a filtering net
with holes not exceeding 0.5 mm in diameter.
Trane cannot be held responsible for any damage to heat exchangers due to the lack of good quality water filters.

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7.1.1 Calculation of total minimum water content, total optimal water content and flow rates
CGWF SE
Plant side chilled water heat exchanger
Vopt Vmin K Q min Q max
[m3] [m3] [m3/h] [m3/h]
One refrigerant circuit sizes
050 0,45 0,26 365,3 5,6 14,9
060 0,51 0,29 358,0 6,4 16,9
065 0,57 0,32 352,4 7,1 18,9
080 0,69 0,39 182,4 8,6 22,9
090 0,78 0,45 178,5 9,8 26,1
110 0,93 0,53 75,6 11,6 31,0
125 1,07 0,61 73,8 13,4 35,6
135 1,17 0,67 72,7 14,7 39,2
150 1,28 0,73 71,7 16,0 42,6
170 1,45 0,83 38,5 18,2 48,5
190 1,64 0,94 27,1 20,5 54,6
215 1,85 1,06 26,6 23,1 61,6
235 2,04 1,16 26,2 25,5 67,9
Two refrigerant circuits sizes
115 0,95 0,54 119,4 11,9 31,6
120 1,01 0,58 118,5 12,7 33,7
130 1,14 0,65 117,0 14,2 37,9
155 1,33 0,76 56,4 16,7 44,4
185 1,57 0,90 55,3 19,6 52,3
210 1,81 1,03 54,5 22,6 60,2
245 2,11 1,21 30,8 26,4 70,5
270 2,33 1,33 30,5 29,1 77,5
290 2,52 1,44 30,3 31,4 83,8
340 2,92 1,67 11,6 36,5 97,4
375 3,21 1,83 11,4 40,1 106,9
420 3,63 2,07 11,2 45,4 121,0
475 4,10 2,34 6,3 51,3 136,7
555 4,78 2,73 6,1 59,7 159,2
610 5,27 3,01 3,6 65,8 175,5
660 5,69 3,25 3,6 71,2 189,8
700 6,00 3,43 3,6 75,0 200,0
LEGEND:
Vmin : minimum water content of the plant
Vopt : optimal water content of the plant
Q min : minimum water flow to the heat exchanger
Q max : maximum water flow to the heat exchanger
ΔTmax chiller = 10 °C
ΔTmin chiller = 3 °C
dpw = K·Q² / 1000 Q = 0,86 P/ΔT

Page 20
CGWF HE
Plant side chilled water heat exchanger
Vopt Vmin K Q min Q max
[m3] [m3] [m3/h] [m3/h]
One refrigerant circuit sizes
055 0,46 0,26 196,1 5,8 15,3
060 0,53 0,30 191,3 6,6 17,5
070 0,59 0,34 187,3 7,4 19,7
085 0,72 0,41 79,0 9,1 24,1
095 0,82 0,47 77,3 10,2 27,3
110 0,96 0,55 41,3 12,0 32,1
130 1,10 0,63 40,3 13,8 36,7
140 1,22 0,70 28,5 15,3 40,8
155 1,33 0,76 28,1 16,7 44,5
Two refrigerant circuits sizes
115 0,98 0,56 58,5 12,3 32,7
125 1,06 0,60 58,0 13,2 35,2
135 1,19 0,68 57,1 14,9 39,6
160 1,36 0,78 32,4 17,0 45,4
190 1,63 0,93 31,8 20,4 54,3
220 1,91 1,09 19,3 23,9 63,7
255 2,19 1,25 12,2 27,4 73,2
285 2,44 1,39 12,0 30,5 81,3
310 2,66 1,52 11,8 33,3 88,8
350 3,03 1,73 6,7 37,9 101,0
395 3,38 1,93 6,5 42,2 112,6
450 3,87 2,21 3,8 48,4 129,1
500 4,28 2,45 3,8 53,5 142,7
585 5,04 2,88 2,3 63,0 168,1
635 5,44 3,11 2,2 68,0 181,4
680 5,83 3,33 2,2 72,9 194,4
700 6,02 3,44 2,3 75,3 200,7
LEGEND:
Vmin : minimum water content of the plant
Vopt : optimal water content of the plant
Q min : minimum water flow to the heat exchanger
Q max : maximum water flow to the heat exchanger
ΔTmax chiller = 10 °C
ΔTmin chiller = 3 °C
dpw = K·Q² / 1000 Q = 0,86 P/ΔT

Page 21
CXWF
Plant side chilled water heat exchanger Plant side hot water hot exchanger
Vopt Vmin K Q min Q max Vopt Vmin K Q min Q max
[m3] [m3] [m3/h] [m3/h] [m3] [m3] [m3/h] [m3/h]
One
refrigerant circuit sizes
060 0,46 0,26 196,1 4,6 15,3 1,49 0,52 94,1 3,5 17,4
070 0,53 0,30 191,3 5,3 17,5 1,70 0,60 92,0 4,0 19,9
080 0,59 0,34 187,3 5,9 19,7 1,92 0,67 89,9 4,5 22,4
095 0,72 0,41 79,0 7,2 24,1 2,35 0,82 87,4 5,5 27,5
110 0,82 0,47 77,3 8,2 27,3 2,65 0,93 46,8 6,2 30,9
125 0,96 0,55 41,3 9,6 32,1 3,13 1,09 45,6 7,3 36,5
145 1,10 0,63 40,3 11,0 36,7 3,58 1,25 32,0 8,4 41,8
160 1,22 0,70 28,5 12,2 40,8 3,97 1,39 31,5 9,3 46,4
175 1,33 0,76 28,1 13,3 44,5 4,34 1,52 31,1 10,1 50,7
Two refrigerant circuits sizes
130 0,98 0,56 58,5 9,8 32,7 3,19 1,12 67,9 7,5 37,3
140 1,06 0,60 58,0 10,6 35,2 3,43 1,20 38,8 8,0 40,0
155 1,19 0,68 57,1 11,9 39,6 3,87 1,35 38,2 9,0 45,1
180 1,36 0,78 32,4 13,6 45,4 4,41 1,54 37,9 10,3 51,5
215 1,63 0,93 31,8 16,3 54,3 5,30 1,85 22,7 12,4 61,8
255 1,91 1,09 19,3 19,1 63,7 6,23 2,18 22,5 14,5 72,7
290 2,19 1,25 12,2 21,9 73,2 7,16 2,51 13,6 16,7 83,6
320 2,44 1,39 12,0 24,4 81,3 7,91 2,77 7,7 18,5 92,3
350 2,66 1,52 11,8 26,6 88,8 8,65 3,03 7,6 20,2 100,9
400 3,03 1,73 6,7 30,3 101,0 9,86 3,45 7,4 23,0 115,0
450 3,38 1,93 6,5 33,8 112,6 11,00 3,85 4,4 25,7 128,3
510 3,87 2,21 3,8 38,7 129,1 12,52 4,38 2,9 29,2 146,1
565 4,28 2,45 3,8 42,8 142,7 13,92 4,87 2,8 32,5 162,4
670 5,04 2,88 2,3 50,4 168,1 16,47 5,77 2,5 38,4 192,2
725 5,44 3,11 2,2 54,4 181,4 17,85 6,25 2,5 41,7 208,3
785 5,83 3,33 2,2 58,3 194,4 19,23 6,73 2,5 44,9 224,4
835 6,02 3,44 2,3 60,2 200,7 20,58 7,20 2,4 48,0 240,1
LEGEND:
Vmin : minimum water content of the plant
Vopt : optimal water content of the plant
Q min : minimum water flow to the heat exchanger
Q max : maximum water flow to the heat exchanger
ΔTmax chiller = 10 °C
ΔTmin chiller = 3 °C
ΔTmax heatpump = 15 °C
ΔTmin heatpump = 3 °C
dpw = K·Q² / 1000 Q = 0,86 P/ΔT
IMPORTANT: In case the water pump is driven by an inverter (either an on-board pump or an external pump) secure that in
every working condition the variation of the water flow rate must be as low as possible.
Flow variation must be less than 10% of the nominal flow rate per minute