Trane CITY RTSF Series User manual

RLC-SVX023B-GB
Water-cooled Liquid Chillers
with Helical Rotary Compressors
RTSF: 180-385kW (R1234ze)
July 2020
Confidential and proprietaryTrane information
Original instructions

Table of Contents
RLC-SVX023B-GB
2
Introduction........................................................................................................ 3
Unit model number description ....................................................................... 5
General Data ...................................................................................................... 7
Unit Description ................................................................................................. 8
Installation - Mechanical ................................................................................. 10
Installation - Electrical .....................................................................................21
Operating Principles Mechanical.................................................................... 27
Typical Operating map .................................................................................... 32
Controls/TracerTD7 Operator Interface.......................................................... 33
Pre-Start Checkout ........................................................................................... 34
Unit Start-up..................................................................................................... 36
Periodic Maintenance ...................................................................................... 38
Maintenance Procedures ................................................................................ 41
Recommended service routine frequencies.................................................. 46
Additional services .......................................................................................... 47

3
RLC-SVX023B-GB
Foreword
These instructions are given as a guide to good practice in the installation, start-up, operation, and maintenance
by the user, of Trane City chiller RTSF, manufactured in France. A separate manual is available for the use and
maintenance of the unit’s control,Tracer™ UC800.They do 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.
Units are assembled, pressure tested, dehydrated, charged and tested in accordance with factory standard before
shipment.
Warnings and Cautions
Warnings and Cautions appear at appropriate sections throughout this manual.Your personal safety and the proper
operation of this machine require that you follow them carefully.The constructor assumes no liability for installations
or servicing performed by unqualified personnel.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
It may also be used to alert against unsafe practices or for equipment or property-damage-only accidents.
Safety Recommendations
To avoid death, injury, equipment or property damage, the following recommendations should be observed 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 the electrical system should be carried out only by qualified and
experienced personnel.
4. To avoid any risk, it is recommended to place the unit on an area with restricted access.
Reception
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 localTRANE 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 localTRANE sales office at the same time.
Important notice: No shipping claims will be accepted byTRANE if the above mentioned procedure is not respected.
For more information, refer to the general sales conditions of your localTRANE sales office.
Note: Unit inspection in France. Delay to send registered letter in case of visible and concealed damage is only
72 hours.
Loose Parts Inventory
Check all the accessories and loose parts that are shipped with the unit against the shipping list. Included in these
items will be the Water Flow Switch (optional), rigging and electrical diagrams, service literature, which are placed
inside the control panel and/or starter panel for shipment.
If optional elastomeric isolators are ordered with the unit they are shipped mounted on the horizontal support frame
of the chiller.The isolators’ location and distribution weight diagram is placed with the service literature inside the
starter/control panel.
Introduction

4RLC-SVX023B-GB
Introduction
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.
Unit Description
The RTSF units are helical-rotary type, water-cooled, liquid chillers, designed for installation indoors. The RTSF units
are packaged with an evaporator and condenser.
Note: Each RTSF unit is a completely assembled, hermetic package that is factory-piped, wired, leak tested,
dehydrated, charged and tested for proper control operations prior to shipment.The chilled water inlet and outlet
openings are covered for shipment.
The RTSF series featuresTrane’s exclusive Adaptive Control logic with UC800 controls. It monitors the control
variables that govern the operation of the chiller unit. Adaptive Control logic can correct these variables, when
necessary, to optimize operational efficiencies, avoid chiller shutdown, and keep producing chilled water.
Compressor loading/unloading is provided by AFD (Adaptive Frequency Drive) coordinated with slide
valve operation.
Each refrigerant circuit is provided with filter, sight glass, electronic expansion valve, and charging valves on
the RTSF.
The evaporator and condenser are manufactured in accordance with Pressure Equipment Directive standards.
The evaporator and the condenser are insulated according the option ordered. Both evaporator and condenser
water pipes are equipped with water drain and vent connections.
Refrigerant
Consult the addendum to Manuals for units with refrigerant, for conformity to the Pressure Equipment Directive
(PED) 97/23/EC or 2014/68/EU and Machinery Directive 2006/42/EC and for specific caution for R1234ze.
Maintenance contract
It is strongly recommended that you sign a maintenance contract with your localTrane 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.
Training
To assist you in obtaining the best use of it and maintaining it in perfect operating condition over a long period of
time, the manufacturer has at your disposal a refrigeration and air conditioning service school. The principal aim of
this is to give operators and technicians a better knowledge of the equipment they are using, or that is under their
charge. Emphasis is particularly given to the importance of periodic checks on the unit operating parameters as well
as on preventive maintenance, which reduces the cost of owning the unit by avoiding serious and costly breakdown.

5
RLC-SVX023B-GB
Digit 1, 2, 3, 4– Unit Model
RTSF
Digit 5, 6, 7 – Unit size
50 = 50 Nominal tons
60 = 60 Nominal tons
70 = 70 Nominal tons
90 = 90 Nominal tons
100 = 100 Nominal tons
110 = 110 Nominal tons
Digit 8– Unit Power supply
D = 400 V – 50 Hz – 3Ph
Digit 9 – Factory
E = Europe
F = ICS
Digit 10 & 11 – Design sequence
(Factory assigned)
Digit 12 & 13 – Not used
Digit 14– Agency listing
C = CE marking
Digit 15– Pressure Vessel Code
2 = PED (Pressure Equipment Directive)
Digit 16 – Unit Application
X = Cooling Mode - Below 50°C Leaving CondenserTemp
H = Cooling Mode - Above 50°C Leaving CondenserTemp
L = Heat pump - Below 50°C Leaving CondenserTemp
M = Heat pump - Above 50°C Leaving CondenserTemp
Digit 17 – Refrigerant
Z = R1234ze unit with Factory charge (with oil)
Y = R1234ze with pre-charge (with oil)
L = R1234ze unit with Nitrogen (no oil)
Digit 18– Sound Attenuation Package
X = Without
A = Aesthetic option
L = Sound attenuation package
Digit 19 – Relief Valve Option
L = Single Relief Valve Condenser
2 = Single Relief Valve Condenser & Evaporator
D = Dual relief valve with 3 way valve condenser
4 = Dual relief valve with 3 way valve condenser & Evaporator
Digit 20 – CompressorType
L = CHHP Low VI
H = CHHP or CHHW High VI
Digit 21 – Evaporator Size
A = Evaporator A
B = Evaporator B
C = Evaporator C
D = Evaporator D
Digit 22 & 23 & 24– Not Used
Digit 25– Evaporator Water side Pressure
X = 10 Bar Evaporator Water Pressure
Digit 26 – Evaporator application
N = Comfort Cooling (above 5°C)
P = Process Cooling below 5°C
C = Ice Making (from -7°C to 20°C)
Digit 27 – Not Used
Digit 28– Evaporator pump
X = Without
Digit 29 – Condenser Size
A = Condenser A
B = Condenser B
C = Condenser C
D = Condenser D
Digit 30 & 31 – Not Used
Digit 32 – Condenser Pump
X = Without
Digit 33 – Condenser Water side pressure
X = 10 Bar Condenser Water Pressure
Digit 34– Condenser Thermal Insulation
X = Without
H = With Condenser Insulation
Digit 35– Oil cooler
X = Without
C = With
Digit 36 – Evaporator Pump Smart Flow control
X = Without
E = VPF Constant Delta T Evaporator
Digit 37 – Power Protection
F = Disconnect switch with fuses
B = Disconnect switch with circuit breakers
Digit 38– Not Used
Digit 39 – Relay Card
1 = With additional relay card
Digit 40 – Smart com protocol
X = Without
B = BACnet MSTP interface
C = BACnet IP interface
M = Modbus RTU interface
L = LonTalk interface
Digit 41 – Communication customer input/output
X = Without
A = External Set points & Capacity outputs – Voltage Signal
B = External Set points & Capacity outputs – Current Signal
Digit 42 – Outdoor AirTemperature Sensor
X = Without
A = Outdoor AirTemperature Sensor – CWR/Low Ambient
Digit 43 – Not Used
Digit 44 – Master Slave Set
X = Without
M = With
Unit model number description

6RLC-SVX023B-GB
Digit 45 – Energy meter
X = Without
M = With
Digit 46 – Condenser Pump Smart Flow Control/Other Condenser
Pressure Control Outputs
X = Without
1 = Condenser Pressure in % HPC
2 = Differential Pressure
3 = Condenser Head Pressure Flow Control
4 = VPF Constant Delta T Condenser Flow Control
Digit 47 – Power socket
X = Without
P = Included (230V-100W)
Digit 48 – Factory test
X = Without
B = Visual Inspection
E =Test E - 1 point with Report Non Witnessed
S = Special test
Digit 49 – Installation Accessory
X = Without
1 = Neoprene isolators
4 = Neoprene pads
Digit 50 – Connection Accessory
X = Grooved pipe connection
W = Grooved pipe with coupling and pipe stub
Digit 51 – Flow switch
X = Without
A = Evaporator or Condenser
B = Evaporator and Condenser
Digit 52 – Literature Language
C = Spanish
D = German
E = English
F = French
H = Dutch
I = Italian
M = Swedish
P = Polish
R = Russian
T = Czech
V = Portugese
6 = Hungarian
8 =Turkish
Digit 53 – Not Used
Digit 54 – EXV selection
X = Standard EXV
Digit 55 – AFD Selection
A = AFD A
B = AFD B
C = AFD C
D = AFD D
E = AFD E
F = AFD F
Digit 56 – Design special
X = Without
S = Special
Unit model number description

7
RLC-SVX023B-GB
Table 1 – General Data RTSF Standard efficiency - R1234ze
RTSF050 RTSF060 RTSF070 RTSF090 RTSF100 RTSF110
Indicative performances (1)
Cooling Capacity (1) (kW) 183 220 264 314 363 388
Total Power input in cooling (1) (kW) 37 43 53 64 80 90
Unit Electrical data (2) (5)
Low VI compressor - digit 20 =L
Maximum Power Input (kW) 66 77 91 111 130 -
Unit rated amps (2) (A) 100 117 138 168 196 -
Unit start up amps (2) (A) 100 117 138 168 196 -
Displacement power factor 0.95 0.95 0.95 0.95 0.95 -
High VI compressor - Digit 20 = H
Maximum Power Input (kW) 87 103 125 150 178 178
Unit rated amps (2) (A) 131 155 190 227 270 270
Unit start up amps (2) (A) 131 155 190 227 270 270
Displacement power factor 0.95 0.95 0.95 0.95 0.95 0.95
Short Circuit Unit Capacity (kA) 35 35 35 35 35 35
Max Power cable (cross) mm² 1x 240 1x 240 1x 240 1x 240 1x 240 1x 240
Disconnect switch size (3) (A) 400 400 400 400 400 400
Compressor
Type Screw Screw Screw Screw Screw Screw
Model 60 70 85 100 120 140
Low VI compressor - digit 20 =L
Max compressors Power Input (kW) 65 76 91 110 129 -
Max Amps (3) (6) (A) 98 115 136 166 194 -
Start up Amps (A) 98 115 136 166 194 -
High VI compressor - Digit 20 = H
Max compressors Power Input (kW) 86 102 124 149 177 177
Max Amps (3) (6) (A) 129 153 188 225 268 268
Start up Amps (A) 129 153 188 225 268 268
Motor RPM (rpm)
Oil sump heater (kW) 0.275 0.275 0.275 0.275 0.275 0.275
Evaporator
Type BPHE BPHE BPHE BPHE BPHE BPHE
Evaporator model CBBAAA
Evaporator Water Content volume (l) 52 59 69 92 92 92
Evap. Water Flow rate - Minimum (4) (l/s) 3.6 4.8 4.8 6.4 6.4 6.4
Evap. Water Flow rate - Maximum (4) (l/s) 38.6 38.6 38.6 38.6 38.6 38.6
Nominal water connection size (Grooved coupling) (in) - (mm) 4" 4" 4" 4" 4" 4"
Condenser
Type BPHE BPHE BPHE BPHE BPHE BPHE
Condenser model BBAAAA
Condenser Water Content volume (l) 49 49 69 69 69 69
Cond. Water Flow rate - Minimum (4) 1.9 1.9 2.7 2.7 2.7 2.7
Cond. Water Flow rate - Maximum (4) 39 39 39 39 39 39
Nominal water connection size (Grooved coupling) (l) 4” 4” 4” 4” 4” 4”
Dimensions
Unit Length (mm) 2334 2334 2334 2334 2334 2334
Unit Width (mm) 922 922 922 922 922 922
Unit Height (mm) 1941 1941 1959 1959 1959 1959
Weights
Shipping Weight (5) (kg) 1611 1675 1900 1986 1986 1986
Operating Weight (5) (kg) 1690 1771 2018 2127 2127 2127
System data (6)
Nb of refrigerant circuits # 1 1 1 1 1 1
Minimum cooling load % % 25% 25% 25% 25% 25% 25%
Standard unit
R1234ze refrigerant charge (6) (kg) 31 34 42 47 47 47
Oil charge (6) (l) 5 5 7 7 7 7
POE Oil type OIL0066E/OIL0067E
(1) Indicative performance at Evaporator water temperature: 12°C / 7°C - Condenser water temperature 30 / 35°C - for detailed performances consult
order write up.
(2) Under 400V/3/50Hz.
(3) Option fuse + disconnect switch.
(4) Height reaches 2050 mm with the sound attenuation package option.
(5) Additional weight of + 158kg in case of a sound attenuation package option.
(6) Electrical & system data are indicative and subject to change without notice. Please refer to unit nameplate data.
General Data

8RLC-SVX023B-GB
Component location for typical RTSF Unit
2 = Power cable gland plate
for customer wiring
4 = Suction line
5 = Oil separator
6 = Condenser water outlet
7 = Condenser water inlet
8 = Evaporator water outlet
9 = Evaporator water inlet
13 = External control wiring
cable gland plate for
customer wiring
14 = Compressor
15 = Discharge line
16 = Unit nameplate (on the
side of starter/control
panel)
17 = EXV
18 = Condenser
15
14
4
9
8
7
16
13
2
5
17
18
6
5
10
4
11 12
3
1
1 = Control panel
3 =Tracer TD7 interface
4 = Suction line
10 = Auxiliary Oil Cooler (Optional)
11 = Evaporator
12 = Adaptive Frequency Drive
Unit Description

9
RLC-SVX023B-GB
Installation overview and requirements
Contractor responsibilities
A list of the contractor responsibilites typically associated with the installation process is provided inTable 2.
• Locate and maintain the loose parts. Loose parts are located in the control panel.
• Install the unit on a foundation with flat support surfaces, level within 5 mm and of sufficient strength to support
concentrated loading. Place the manufacturer-supplied isolation pad assemblies under the unit.
• Install the unit per the instructions outlined in the “Mechanical Installation” section.
• Complete all water piping and electrical connections.
Note: Field piping must be arranged and supported to avoid stress on the equipment. It is strongly recommended
that the piping contractor provide at least 1m of clearance between the pre-installation piping and the planned
location of the unit.This will allow for proper fit-up upon arrival of the unit at the installation site. All necessary
piping adjustments can be made at that time
• Where specified, supply and install valves in the water piping upstream and downstream of the evaporator and
condenser, to isolate the heat exchangers for maintenance and to balance/trim the system.
• Supply and install flow switches or equivalent devices in both the chilled water and condenser water piping.
Interlock each switch with the proper pump starter andTracer UC800, to ensure that the unit can only operate when
water flow is established.
• Supply and install taps for thermometers and pressure gauges in the water piping, adjacent to the inlet and outlet
connections of both the evaporator and the condenser.
• Where specified, supply and install strainers ahead of all pumps and automatic modulating valves.
• Supply and install refrigerant pressure relief piping from the pressure relief to the atmosphere.
• Start the unit under supervision of a qualified service technician.
• Where specified, supply and insulate the evaporator and any other portion of the unit, as required, to prevent
sweating under normal operating conditions.
• For unit-mounted starters, cutouts are provided at the top of the panel for line-side wiring.
• Supply and install the wire terminal lugs to the starter.
• Supply and install field wiring to the line-side lugs of the starter.
Table 2 – Installation Responsibility
Requirement Trane supplied
Trane installed
Trane supplied
Field installed
Customer supplied
Customer installed
Foundation Meet foundation requirements
Rigging Safety chains
Clevis connectors
Lifting beams
Isolation Isolation pads Other type of isolators
Electrical - Circuit breakers or fusible
disconnects (Optional)
- Unit mounted starter
- Wye Delta starter or AFD
(Adaptive Frequency Drive)
- Flow switches (may be field
supplied)
- Harmonic filters (on request
according to customer electrical
network and equipment)
- Circuit breakers or fusible disconnect
- Electrical connections to unit mounted
starter (optional)
- Electrical connections to remote
mounted starter (optional)
- Wiring sizes per submittal and local
regulations
- Terminal lugs
- Ground connections
- BAS wiring (optional)
- Control voltage wiring
- Chilled water pump contactor and
wiring including interlock
- Option relays and wiring
Water piping Flow switches (may be field
supplied)
- Taps for thermometers and gauges
- Thermometers
- Strainers (as required)
- Water flow pressure gauges
- Isolation and balancing valves in water
piping
- Vents and drain on waterbox valves
- Pressure relief valves for water side
Insulation Insulation Insulation
Water piping connection
components
- Grooved pipe
- Grooved pipe to flagged
connection (optional)
Caution on exposure to
refrigerant
Respect recommendation of IOM
addendum
Unit Description

10 RLC-SVX023B-GB
Installation - Mechanical
Storage
If the chiller is to be stored more than one month prior to installation, observe the following precautions:
• Do not remove the protective coverings from the electrical panel.
• Store the chiller in a dry, vibration-free, secure area.
• At least every three months, attach a gauge and manually check the pressure in the refrigerant circuit.
If the refrigerant pressure is below 3.4 bar at 21°C (2 bar at 10 °C), call a qualified service organization
and the appropriateTrane sales office.
NOTE: Pressure will be approximately 1.0 bar if shipped with the optional nitrogen charge.
Noise Considerations
• Refer to Engineering Bulletin for sound consideration applications.
• Locate the unit away from sound-sensitive areas.
• Install the isolation pads under the unit. Refer to “Unit Isolation.”
• Install rubber vibration isolators in all water piping.
• Use flexible electrical conduit for final connection to theTracer UC800.
• Seal all wall penetrations.
NOTE: Consult an acoustical engineer for critical applications.
Foundation
Provide rigid, non-warping mounting pads or a concrete foundation of sufficient strength and mass to support
the chiller operating weight (including completed piping and full operating charges of refrigerant, oil and water).
Refer to General information for unit operating weights.
Once in place, level the chiller within 5 mm over its length and width.
The manufacturer is not responsible for equipment problems resulting from an improperly designed or constructed
foundation.
Vibration Eliminators
• Provide rubber boot type isolators for all water piping at the unit.
• Provide flexible conduit for electrical connections to the unit.
• Isolate all pipe hangers and be sure they are not supported by main structure beams that could introduce vibration
into occupied spaces.
• Make sure that the piping does not put additional stress on the unit.
NOTE: Do not use metal braided type eliminators on the water piping. Metal braided eliminators are not effective at
the frequencies at which the unit will operate.
Clearances
Provide enough space around the unit to allow the installation and maintenance personnel unrestricted access to
all service points. A minimum of 1 m is recommended for compressor service and to provide sufficient clearance
for the opening of control panel doors. In all cases, local codes will take precedence over these recommendations.
If the room configuration requires a variance to the clearance dimensions, contact your sales representative.
NOTE: Required vertical clearance above the unit is at least 1 m.There should be no piping or conduit located over
the compressor motor.
NOTE: Maximum clearances are given. Depending on the unit configuration, some units may require less clearance
than others in the same category.
Ventilation
The unit produces heat even though the compressor is cooled by the refrigerant. Make provisions to remove heat
generated by unit operation from the equipment room. Ventilation must be adequate to maintain an ambient
temperature lower than 40°C. Vent the pressure relief valves in accordance with all local and national codes. Refer to
“Pressure Relief Valves”. Make provisions in the equipment room to keep the chiller from being exposed to ambient
temperatures below 10°C.

11
RLC-SVX023B-GB
Installation - Mechanical
Water Drainage
Locate the unit near a large capacity drain for water vessel drain-down during shutdown or repair. Condenser and
evaporator water pipes are provided with drain connections. Refer to “Water Piping.” All local and national codes apply.
Access Restrictions
Refer to the unit submittals for specific dimensional information (documents supplied in document package coming
with unit).
Handling Procedure
Follow instructions given in the lifting and handling document supplied with documentation package shipped with
the unit.
Figure 1 –
Handling
YES NO
930 1042
Isolation Pads
1. The elastomeric pads shipped (as standard) are adequate for most installations. For additional details on
isolation practices, consult an acoustical engineer for sensitive installations. It is possible that some vibration
frequencies can be transmitted into the foundations.This depends on the building structure. It is recommended
for these situations to use neoprene isolators instead of elastomeric pads.
Drawings to locate isolation pads are supplied with unit document package.
2. During final positioning of the unit, place the isolation pads as indicated in submittal drawings. Level the unit.
Drawings to locate isolation pads are included with in document package sent with the unit.

12 RLC-SVX023B-GB
Installation - Mechanical
Unit Leveling
NOTE: The electrical panel side of the unit is designated as the “front” of the unit.
1. Check unit level end-to-end by placing a level on the chiller structure (compressor frame for example).
2. Adjust to within 5 mm of level front-to-back.
Water Piping
Piping Connections
To prevent equipment damage, bypass the unit if using an acidic flushing agent.
Make water piping connections to the evaporator and condenser. Isolate and support piping to prevent stress on
the unit. Construct piping according to local and national codes. Insulate and flush piping before connecting to unit.
The chilled water connections to the evaporator are to be grooved-pipe type connections. Do not attempt to weld
these connections. Refer to submittal for dimension of tube stub for grooved connection. Refer to submittal for
dimension of tube stub for grooved connection.
To prevent damage to chilled water components, do not allow evaporator pressure (maximum working pressure)
to exceed 10 bar.
Reversing Water Connections is prohibited
It is critical to keep the factory layout for water connections.Therefore reversing water connections may lead to
functional disorder.
NOTE: Dimensions of tube stub for grooved connection are included in submittal drawings.
Vents and Drains
Install pipe plugs in evaporator and condenser water connections drain and vent connections before filling the water
systems.To drain water, remove vent and drain plugs, install a NPT connector in the drain connection and connect a
hose to it.
Water Treatment
WARNING: Do not use untreated or improperly treated water. Use of untreated or improperly treated water may
result in equipment damage.
The following disclamatory label is provided on each unit:
The use of improperly treated or untreated water in this equipment may result in scaling, erosion, corrosion, algae or
slime.The services of a qualified water treatment specialist should be engaged to determine what treatment, if any,
is advisable.The warranty specifically excludes liability for corrosion, erosion or deterioration of the manufacturer’s
equipment.The manufacturer assumes no responsibilities for the results of the use of untreated or improperly
treated water, or saline or brackish water.

13
RLC-SVX023B-GB
Evaporator Piping Components
Note: Make sure all piping components are between the shutoff valves, so that isolation can be accomplished on
both the condenser and the evaporator. “Piping components” include all devices and controls used to provide proper
water system operation and unit operating safety. These components and their general locations are given below.
Entering Chilled Water Piping
• Air vents (to bleed air from system)
• Water pressure gauges with shutoff valves
• Pipe unions
• Vibration eliminators (rubber boots)
• Shutoff (isolation) valves
• Thermometers
• Clean out tees
• Pipe strainer
Leaving Chilled Water Piping
• Air vents (to bleed air from system)
• Water pressure gauges with shutoff valves
• Pipe unions
• Vibration eliminators (rubber boots)
• Shutoff (isolation) valves
• Thermometers
• Clean out tees
• Balancing valve
• Pressure relief valve
To prevent evaporator damage, do not exceed 10 bar evaporator water pressure for standard units.
To prevent heat exchangers damage, install a strainer in the evaporator water inlet piping.
Condenser Piping Components
“Piping components” include all devices and controls used to provide proper water system operation and unit
operating safety.These components and their general locations are given below.
Entering Condenser Water Piping
• Air vents (to bleed air from system)
• Water pressure gauges with shutoff valves
• Pipe unions
• Vibration eliminators (rubber boots)
• Shutoff (isolation) valves
• Thermometers
• Clean out tees
• Pipe strainer
• Flow switch
Leaving Condenser Water Piping
• Air vents (to bleed air from system)
• Water pressure gauges with shutoff valves
• Pipe unions
• Vibration eliminators (rubber boots)
• Shutoff (isolation) valve
• Thermometers
• Clean out tees
• Balancing valve
• Pressure relief valve
To prevent condenser damage, do not exceed 10 bar water pressure for standard units.
To prevent heat exchangers damage, install a strainer in condenser water inlet piping.
Installation - Mechanical

14 RLC-SVX023B-GB
Installation - Mechanical
Water Pressure Gauges andThermometers
Install field-supplied thermometers and pressure gauges (with manifolds, whenever practical). Locate pressure
gauges or taps in a straight run of pipe; avoid placement near elbows, etc. Be sure to install the gauges at the same
elevation on each shell if the shells have opposite-end water connections.
Water Pressure Relief Valves
Install a pressure relief valve in both evaporator and condenser water systems. Failure to do so could result in Heat
Exchanger damage.
When shutoff valves are installed on the water circuits, the water temperature can increase and create a high
pressure in the water systems. Refer to applicable regulation for relief valve installation guidelines.
Flow Sensing Devices
Use field-provided flow switches or differential pressure switches with pump interlocks to sense system water flow.
To provide chiller protection, install and wire flow switches in series with the water pump interlocks, for both chilled
water and condenser water circuits (refer to the “Installation Electrical” section). Specific connections and schematic
wiring diagrams are shipped with the unit.
Flow switches must stop or prevent compressor operation if either system water flow drops off drastically. Follow
the manufacturer’s recommendations for selection and installation procedures. General guidelines for flow switch
installation are outlined below.
• Mount the switch upright, with a minimum of 5 pipe diameters of straight, horizontal run on each side.
• Do not install close to elbows, orifices or valves.
Note: The arrow on the switch must point in the direction of the water flow.To prevent switch fluttering, remove all
air from the water system.
Note:TheTracer UC800 provides a 6-second time delay on the flow switch input before shutting down the unit
on a loss-of-flow diagnostic. Contact a qualified service organization if nuisance machine shutdowns persist.
Adjust the switch to open when water flow falls below nominal. Refer to the General Data table for minimum flow
recommendations. Flow switch contacts are closed on proof of water flow.
Refrigerant Pressure Relief Valve Venting
To prevent injury due to inhalation of refrigerant gas, do not discharge refrigerant anywhere. If multiple chillers are
installed, each unit must have separate venting for its relief valves. Consult local regulations for any special relief
line requirements.
All relief valve venting is the responsibility of the installing contractor. All RTSF units use condenser pressure relief
valves that must be collected. Relief valve connection sizes and locations are shown in the unit submittals. Refer to
national regulations for relief valve vent line sizing information.
Do not exceed vent piping code specifications. Failure to heed specifications could result in capacity reduction, unit
damage and/or relief valve damage.
Note: Once opened, relief valves tend to leak.

15
RLC-SVX023B-GB
0.1
1
10
100
1000
1.0 10.0 100.0
Pressure Drop (kPa)
WaterFlow (L/s)
RTSF condensers Pressure drop on waterside
A
B
C
D
1
10
100
1000
1.0 10.0 100.0
Pressure Drop (kPa)
WaterFlow (L/s)
RTSF evaporators Pressure drop on waterside
A
B
C
D
Installation - Mechanical
RTSF condensers Pressure drop on waterside
RTSF evaporators Pressure drop on waterside

16 RLC-SVX023B-GB
Freeze protection
For all chillers it is extremely important to keep full water flow in the evaporator and condenser for an extended time
after last compressor stops.This will protect evaporator tube from freezing by refrigerant migration.
This is why both evaporator and condenser water pump output relay must be used to control the chilled water pump.
It is mandatory even if glycol is used with protection down to lowest ambient expected.
For unit operation in a low temperature environment, adequate protection measures must be taken against freezing.
Freeze protection can be accomplished by adding sufficient glycol to protect against freezing below the lowest
ambient expected.
Important: Be sure to apply appropriate LERTC (Low Evaporator RefrigerantTemperature Cutout) and LWTC
(Low Water Temperature Cutout) control setpoints based on the concentration of the freeze inhibitor or solution
freeze point temperature.
Avoid the use of very low or near minimum chilled fluid flow rates through the chiller. Higher velocity chilled fluid
flow reduces freeze risk in all situations. Flow rates below published limits have increased freeze potential and have
not been considered by freeze protection algorithms.
• Avoid applications and situations that result in a requirement for rapid cycling or repeated starting and stopping of
the chiller. Keep in mind that chiller control algorithms may prevent a rapid compressor restart after shutting down
when the evaporator has been operating near or below the LERTC limit.
• Maintain refrigerant charge at appropriate levels. If charge is in question, contact Trane service. A reduced or
low level of charge can increase the likelihood of freezing conditions in the evaporator and/or LERTC diagnostic
shutdowns.
Installation - Mechanical

17
RLC-SVX023B-GB
RTSF Low Refrigerant temperature Ethylene Glycol and Propylene Glycol and Freeze protection settings.
Table 3 – Recommended low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout
(LWTC) for RTSF chillers
Ethylene Glycol Mono Propylene Glycol
Glycol
Percentage
(weight %)
Solution
Freeze
Point (°C)
Minimum
Recommended
LRTC
(°C)
Minimum
Recommended
LWTC
(°C)
Solution
Freeze
Point (°C)
Minimum
Recommended
LRTC
(°C)
Minimum
Recommended
LWTC
(°C)
0 0.0 0.0 2.8 0.0 0.0 2.8
2 -0.6 -1.4 2.2 -0.6 -1.4 2.2
4 -1.3 -2.1 1.5 -1.2 -2.0 1.6
5 -1.7 -2.5 1.1 -1.5 -2.3 1.3
6 -2.0 -2.9 0.7 -1.8 -2.6 1.0
8 -2.8 -3.6 0.0 -2.5 -3.3 0.3
10 -3.6 -4.5 -0.8 -3.1 -4.0 -0.4
12 -4.5 -5.3 -1.7 -3.8 -4.7 -1.1
14 -5.4 -6.2 -2.6 -4.6 -5.4 -1.8
15 -5.9 -6.7 -3.1 -5.0 -5.8 -2.2
16 -6.3 -7.2 -3.6 -5.4 -6.2 -2.6
18 -7.4 -8.2 -4.6 -6.2 -7.0 -3.4
20 -8.4 -9.3 -5.7 -7.1 -7.9 -4.3
22 -9.6 -10.4 -6.8 -8.0 -8.8 -5.2
24 -10.8 -11.6 -8.0 -9.0 -9.9 -6.3
25 -11.4 -12.3 -8.7 -9.6 -10.4 -6.8
26 -12.1 -12.9 -9.3 -10.1 -11.0 -7.4
28 -13.5 -14.3 -10.7 -11.3 -12.2 -8.5
30 -15.0 -15.8 -12.2 -12.6 -13.4 -9.8
32 -16.5 -17.3 -13.7 -14.0 -14.8 -11.2
34 -18.2 -19.0 -15.0 -15.5 -16.3 -12.7
35 -19.0 -19.9 -15.0 -16.3 -17.1 -13.5
36 -19.9 -20.6 -15.0 -17.1 -17.9 -14.3
38 -21.8 -20.6 -15.0 -18.8 -19.6 -15.0
40 -23.8 -20.6 -15.0 -20.7 -20.6 -15.0
42 -25.9 -20.6 -15.0 -22.6 -20.6 -15.0
44 -28.1 -20.6 -15.0 -24.8 -20.6 -15.0
45 -29.3 -20.6 -15.0 -25.9 -20.6 -15.0
46 -30.5 -20.6 -15.0 -27.1 -20.6 -15.0
48 -33.0 -20.6 -15.0 -29.5 -20.6 -15.0
50 -35.6 -20.6 -15.0 -32.1 -20.6 -15.0
CAUTION!
1. Additional glycol beyond the recommendations will adversely affect unit performance.The unit efficiency will be reduced and the saturated
evaporator temperature will be reduced. For some operating conditions this effect can be significant.
2. If additional glycol is used, then use the actual % glycol to establish the low refrigerant cutout set point.
3. The minimum low refrigerant cutout set point allowed is - 20.6°C.This minimum is established by the solubility limits of the oil in the refrigerant.
4. With glycol application, ensure that there is no fluctuation of brine flow versus Order Write Up value, as a reduction of flow will adversely affect
unit performance and behaviour.
5. Tables above should not be interpreted as suggesting operating ability or performance characteristics at all tabulated glycol percentages.
Full unit simulation is required for proper prediction of unit performance for specific operating conditions. For information on specific
conditions, contactTrane.
Installation - Mechanical

18 RLC-SVX023B-GB
Condenser Water Temperatures
With the model RTSF chiller, a condenser water control method is necessary only if the unit starts with entering
water temperatures below 13°C, or between 7°C and 13°C, when a temperature increase of 0.6°C per minute to 13°C
is not possible.
When the application requires startup temperatures below the prescribed minimums, a variety of options are
available.To control a 2-way or 3-way valve,Trane offers a Condenser Regulating Valve Control option for the
Tracer UC800 controls.
Condenser leaving water temperature must be 9°C higher that evaporator leaving water temperature within
2 minutes after start-up. A minimum of 14°C differential must be maintained afterwards.
The minimum acceptable refrigerant pressure differential between condenser and evaporator is 1.7 Bar.The chiller
control system will attempt to obtain and maintain this differential at startup, but for continuous operation a
design should maintain a 14°C differential from evaporator leaving water temperature to condenser leaving water
temperature.
CAUTION! In case of low evaporator leaving water temperature applications, the non use of glycol on the condenser
side may result in condenser plate freeze-up.
Condenser Water Regulation
The Condenser Head Pressure Control Option provides for a 0-10VDC (maximum range -a smaller range is
adjustable) output interface to the customer’s condenser water flow device.This option enables theTracer UC800
controls to send a signal for opening and closing a 2-way or 3-way valve as necessary to maintain chiller differential
pressure.
Methods other than those shown can be employed to achieve the same results. Contact your local Trane office for
details.
Contact the manufacturer of the cooling device for compatibilty with variable water flow.
Throttling valve (Figure 2)
This method maintains condensing pressure and temperature by throttling water flow leaving the condenser in
response to condenser pressure or system differential pressures.
Advantages:
• Good control with proper valve sizing at relatively low cost.
• Pumping cost can be reduced.
Disadvantages:
• Increased rate of fouling due to lower condenser water velocity.
• Requires pumps that can accommodate variable flow.
Figure 2
1
3
4
4
CDS
EVP
5A
6
7
2B
CO
CI
EO
EI
Installation - Mechanical

19
RLC-SVX023B-GB
Installation - Mechanical
Cooling device bypass – Figure 3
Cooling device bypass is also a valid control method if the chiller temperature requirements can be maintained.
Advantage:
• Excellent control by maintaining constant water flow through the condenser.
Disadvantage:
• Higher cost because of the dedicated pump required for each chiller if condenser pressure is the control signal.
Figure 3
1
2A
3
4
4
CDS
EVP
5A
6
7
CO
CI
EO
EI

20 RLC-SVX023B-GB
Condenser water pump with variable frequency drive – Figure 4
Advantages:
• Pumping cost can be reduced. Good cooling device temperature control.
• Relatively low first cost.
Disadvantage:
• Increased rate of fouling due to lower water velocity in the condenser.
Figure 4
8
4
CDS
EVP
5B
7
CO
CI
EO
EI
1 = Electric valve actuator
2A = 3-way valve or 2 butterfly valves
2B = 2 butterfly valves
3 = RTSF controller
4 = Refrigerant pressure line
5A = Condenser water pump
5B = Condenser water pump with VFD
6 =To/from cooling load
7 =To/from cooling device
8 = Electric controller
EI = Evaporator Inlet
EO = Evaporator Outlet
CI = Condenser Inlet
CO = Condenser Outlet
Condenser Water Regulating Valve Adjustment
A separate Settings Menu tab entitled “Condenser Head Pressure Control -Setup” that is only visible if the
configuration is selected, contain the following settings and manual overrides for user adjustments and
commissioning all under one tab:
• “Off State” Output Command (0-10 Vdc, 0.1 volt increments, Default 2.0 Vdc)
• Output Voltage @Desired Minimum Flow (Adj: 0 to 10.0 in 0.1 volt increments, Default 2.0 Vdc)
• Desired Minimum Flow (Adj:0-100% of full flow in 1%intervals, Default 20%)
• Output Voltage @Desired Maximum Flow (Adj: 0 to 10.0 in 0.1 volt increments (or finer),Default 10 Vdc)
• Actuator StrokeTime (Min to Max RangeTime)(Adj: 1 to 1000 seconds, in 1 second increments, Default 30s)
• Damping Coefficient (adj: 0.1 to 1.8, in 0.1 increments, Default .5)
• Head Pressure Control Override (enumeration of: disabled (auto),”off” state, minimum, maximum (100%),) default :
disabled (auto). When this setting is in “disabled (auto)”
• Condenser Water Pump PrerunTime
WARNING: In low temperature chilled water applications, in the case of a power loss, there is a risk of a condenser
freeze-up. For low temperature chilled water applications, it is recommended to take freeze protection measures.
Installation - Mechanical