Trane RAUL 190 User manual

RAU-SVX01G-GB
RAUL
Air Cooled Condensing Unit
Sizes 190 – 260 – 300 – 350 – 400
450 – 500 – 600 – 700 – 800
July 2020
Confidential and proprietaryTrane information
Original instructions
To be used
with the CH530 control
module manual

Table of Contents
RAU-SVX01G-GB
2
General information ....................................................................................................3
Foreword ............................................................................................................3
Warnings and cautions......................................................................................3
Safety recommendations..................................................................................3
Reception............................................................................................................3
Warranty .............................................................................................................3
Contents .......................................................................................................................4
Refrigerant..........................................................................................................4
Environmental Protection / Compliance with F-Gas regulation.....................4
Maintenance contract........................................................................................4
Training...............................................................................................................4
Unit nameplate ..................................................................................................5
Installation instructions.....................................................................................5
Handling .............................................................................................................5
Installation....................................................................................................................5
Refrigerant lines.................................................................................................6
Refrigerant charge (all split system types) ......................................................7
Oil charge ...........................................................................................................7
Electrical connections...................................................................................... 10
Temperature sensor......................................................................................... 10
Hot gas-bypass control (option) ..................................................................... 10
Capacity control modes .................................................................................. 11
General start-up .........................................................................................................12
Start-up Preparation ........................................................................................12
Start-up.............................................................................................................12
Control System ................................................................................................15
Unit operations ................................................................................................15
Week end shutdown ........................................................................................15
Seasonal shutdown .........................................................................................15
Seasonal start-up.............................................................................................15
Operation....................................................................................................................15
Maintenance...............................................................................................................16
Installation checklist...................................................................................................17
Troubleshooting guide ..............................................................................................18
Performance Data ......................................................................................................20
Notes...........................................................................................................................22

3
RAU-SVX01G-GB
Foreword
These instructions are given as a guide to good practice in the installation, start-up, operation, and maintenance by
the user, ofTrane RAUL.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 run tested 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». Always provide a pressure regulator.
2. Disconnect the main power supply 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.
Reception
On arrival, inspect the unit before signing the delivery note.
Reception in France only:
In case of visible damage:The consignee (or the site representative) must specify any damage on the delivery
note, legibly sign and date the delivery note, and the truck driver must countersign it. The consignee (or the site
representative) must notifyTrane Epinal Operations - Claims team and send a copy of the delivery note.The customer
(or the site representative) should send a registered letter to the last carrier within 3 days of delivery.
Note: for deliveries in France, even concealed damage must be looked for at delivery and immediately treated as
visible damage.
Reception in all countries except France:
In case of concealed damage:The consignee (or the site representative) must send a registered letter to the
last carrier within 7 days of delivery, claiming for the described damage. A copy of this letter must be sent to
Trane Epinal Operations - Claims team.
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.
General information

4RAU-SVX01G-GB
Refrigerant
The refrigerant provided by the manufacturer meets all the requirements of our units. When using recycled or
reprocessed refrigerant, it is advisable to ensure its quality is equivalent to that of a new refrigerant. For this,
it is necessary to have a precise analysis made by a specialized laboratory. If this condition is not respected,
the manufacturer warranty could be cancelled.
Environmental Protection / Compliance with F-Gas regulation
This equipment contains a fluorinated gas covered by the Kyoto Protocol [or an ozone depleting substance
covered by Montreal Protocol].The type and quantity of refrigerant per circuit is indicated on the product nameplate.
The Global Warming Potential of the refrigerant implemented inTrane Air Conditioning and Refrigeration Equipment
is presented in the table by type of refrigerant.
Refrigerant type GWP (1) value
R134a 1 300
R407C 1 653
The operator (contractor or end user) must check local environmental regulations impacting installation, operation
and disposal of the equipment; in particular need to recover environmentally harmful substances (refrigerant, oil,
antifreeze agents, etc.) Do not vent into the atmosphere any refrigerant. The handling of refrigerant shall be fulfilled
by a qualified service engineer.
(1) GWP = global warming potential
Maintenance contract
It is strongly recommended that you sign a maintenance contract with your local 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.
Contents

5
RAU-SVX01G-GB
Installation
For minimum clearance, consult the certified submittals, which are available on request from yourTrane Sales Office.
Unit nameplate
The unit nameplate gives the complete model reference numbers.The unit power rating is shown, and power
supplies should not deviate by more than 5 % from the rated power.
Compressor motor amperage is shown in box I.MAX.
The customer’s electrical installation must be able to withstand this current.
Installation instructions
Foundations
No special foundations are required, provided the supporting surface is flat and level, and can withstand the weight
or the unit.
Anti-vibration rubber pads
They are supplied as standard with the machine, and should be placed between the supporting floor and the unit to
attenuate vibrations.
– 4 pads for the sizes 190 to 300
– 6 pads for the sizes 350 to 800
– Trane does not allow the installation of spring isolators.
Clearance
Respect recommended clearance around the unit to allow maintenance operation to take place without obstruction
and recommended clearance around condenser.
CAUTION! Unit operation depends on the air temperature. Any recycling of the air fed out by the fans will increase
the air intake temperature over the condenser fins and can result in high pressure cut-out.
In this case the standard operating conditions are modified.
Operation of the unit may be affected by an increase in air temperature on the condenser.
When the units are positioned in a windy area, avoid all the risks of air-cooled recycling.
See submittals
Handling
Note:
The plates welded at the end of the bases must not be used for handling.
Figure 1 –
Handling
A
B

6RAU-SVX01G-GB
Installation
Table 1 – Dimensions of recommended slings and swing-bar:
190 260 300 350 400 450 500 600 700 800
A (mm) 1500 1500 1500 1500 1500 1500 2400 2400 2300 2300
B (mm) 1800 1800 1800 1800 1800 1800 1800 1800 2200 2200
Weight - crated (kg) 555 625 691 869 959 985 1123 1251 1695 1754
Refrigerant lines
Figure 2 – Refrigerant flow chart
1 = Compressor
2 = Condenser coil
3 = Subcooler coil
4 = Schraeder valve
5 = Coil header
6 = Relief valve
7 = High pressure switch
8 = Low pressure transducer
9 = High pressure transducer
10 = Stop valve
Calculating and fixing the capacity of refrigerant lines is necessary to assure the oil return to the compressor, avoid
refrigerant phase changes and limit pressure drop.
Liquid lines
Calculate capacity of liquid line, as per the following criteria.
1. Maximum load operating conditions.
2. To avoid any evaporation risk:
– Consider the vertical risers
– Maximum pressure drop must not exceed 1 to 2°C
3. Liquid circulation speed in a 0.5 to 2m/s range.
Discharge lines
Discharge lines should be calculated to obtain the gas displacement speed in horizontal and vertical lines required to
drive compressor oil. Determine diameter of discharge lines as per the following criteria.
1. Speed above 2.5 m/s horizontally. (Consider minimum speed at minimum load).
2. Speed above 5.0 m/s vertically (Vertical risers, consider speed at minimum load).
3. Maximum speed 20 m/s.
4. Horizontal pipe run must be pitched of 1cm/m in the same direction as the refrigerant circulation.
5. An oil trap is necessary for vertical risers greater than 3m. For major elevations add an intermediate oil trap
every 5m.
6. Maximum pressure drop between 20 to 50 kPa.
7. Install a filter drier adapted to refrigerant capacity.

7
RAU-SVX01G-GB
Installation
Insulation of refrigerant lines
Insulate refrigerant lines from building itself to avoid transmission to building structure of vibrations normally
caused by pipework.
Also avoid bypassing the unit’s damping system by fixing the refrigerant lines or the electrical ducts very rigidly.
Vibrations may propagate into building structure through rigidly fixed refrigerant lines.
Pressure tests. Leak detection
During operations, take the following precaution:
1. Neither oxygen nor acethylene should be used instead of refrigerant and nitrogen to detect leaks, otherwise a
violent explosion may occur.
2. Always use valves and manometers to check the test pressure in system. Excessive pressure may either cause
pipes to rupture, damage unit, or cause an explosion, causing possible physical injury.
Carry out liquid line and hot gas line pressure tests in accordance with current standards.
The test pressures applied to the liquid line and the hot gas suction line must comply with the country’s standards.
Caution: Do not go more than 0.7 bar above the high pressure switch setpoint.
Introduce enough refrigerant into circuit in order to obtain a pressure of 85 to 100 kPa. Search for possible leaks
using detector.This operation should be carried out with great care throughout the system.
If leaks are detected, pump down the refrigerant, and repair defective component. Repeat test process, to check that
the repair can withstand rated pressure.
Refrigerant charge (all split system types)
Units ship with a nitrogen holding charge and isolating valves.
After system pressure and vacuum testing, fill up unit with refrigerant.The refrigerant complement will be charged
according to the diameter and the length of the refrigerant piping work up to obtain the correct superheat and
subcooling temperatures.
Oil charge
The oil quantity necessary for the split system has also to be adjusted according to the diameter and the length of
the refrigerant piping work.
Important note: These operations have to be performed by a specialist according to the rules of the art.The results
have to be written on a start up record by theTrane engineer or the client’s specialist who has performed this start
up.The quantity of refrigerant and oil added are at the client’s charges.

8RAU-SVX01G-GB
Installation
Table 2 – R407C General data
RAU 190 RAU 260 RAU 300 RAU 350 RAU 400 RAU 450 RAU 500 RAU 600 RAU 700 RAU 800
R407C R407C R407C R407C R407C R407C R407C R407C R407C R407C
Performances (1)
Gross cooling capacity (1) (kW) 54.8 66.6 81.1 95.3 108.3 118.8 133.0 162.0 194.7 218.8
Power input in cooling (1) (kW) 16.7 23.6 28.2 31.0 36.1 43.2 48.7 57.9 61.8 74.6
Main Power supply 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50
Sound Power Level (5) (dB(A)) 88 90 91 91 92 93 93 94 98 98
Units
Amps
Nominal (4) (A) 41.3 50.1 59.0 70.3 79.1 88.0 99.3 117.0 150.4 168.1
Start-up Amps (A) 144 199 207 219 228 236 248 265 299 316
Max supply cable size (mm2)3535355050959595150150
Compressor
Number 2223334466
Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll
Model
10T+10T 10T+15T 2x15T 10+10T- 15T 10T+15T - 15T 15T+15T - 15T 2x(10T+15T) 2 x (15T+15T) 2x(10T+10T+15T) 2x(10T+15T+15T)
Number of speeds 1111111111
Number of motors C1 / C2 2 2 2 2 / 1 2 / 1 2 / 1 2 / 2 2 / 2 3 / 3 3 / 3
Rated Amps (2)(4) (A) 17.7 17.7 / 26.6 26.6 17.7 / 26.617.7 / 26.6 26.6 17.7 / 26.6 26.6 17.7 / 26.617.7 / 26.6
Locked rotor Amps (2) (A) 120 120 / 175 175 120 / 175 120 / 175 175 120 / 175 175 120 / 175 120 / 175
Motor RPM (rpm) 2900 2900 2900 2900 2900 2900 2900 2900 2900 2900
Sump Heater (2) (W)
50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V
Liquid and Suction connection
Suction connection brazed 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 2”1/8 2”1/8
Liquid connection brazed 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 1”1/8 1”1/8
Coil
Type Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin
Tube size (mm) 9.52 9.52 9.52 9.52 9.52 9.52 9.52 9.52 9.52 9.52
Tube type Smooth Smooth Smooth Smooth Smooth Smooth Smooth Smooth Smooth Smooth
Height (mm) 1219 1219 1219 1219 1219 1219 1219 1219 1219 1219
Length (mm) 2743 2743 2743 3455 4115 4115 5486 5486 5486 5486
Face Area (m2) 3.34 3.34 3.34 4.21 5.02 5.02 6.69 6.69 6.69 6.69
Rows # 2233332333
Fins per foot (fpf) # 156.0 156.0 156.0 156.0 156.0 156.0 156.0 156.0 156.0 156.0
Fan
Type Propeller Propeller Propeller Propeller Propeller Propeller Propeller Propeller Propeller Propeller
Number 2223334466
Diameter (mm) 962 962 962 962 962 962 962 962 962 962
Drive type Direct Direct Direct Direct Direct Direct Direct Direct Direct Direct
Number of speeds 1111111111
Air flow (m3/h) 27000 27000 25300 35900 37900 37900 54000 50700 89100 89100
Number of motors 2223334466
Motor HP (2) (kW) 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 1.72 1.72
Rated Amps (2) (A) 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 3.26 3.26
Locked rotor Amps (2) (A) 6.9 6.9 6.9 6.9 6.9 6.9 6.9 6.9 15.5 15.5
Motor RPM (rpm) 705 705 705 705 705 705 705 705 930 930
Dimensions
Height (mm) 1582 1582 1582 1582 1582 1582 1584 1584 1598 1598
Length (mm) 2061 2061 2061 2921 2921 2921 2225 2225 3090 3090
Width (mm) 995 995 995 995 995 995 1865 1865 1948 1948
Weight uncrated (kg) 514 584 650 810 900 926 1040 1168 1575 1634
Weight crated (kg) 555 625 691 869 959 985 1123 1251 1695 1754
System Data
Refrigerant circuit 1112222222
System Data
Refrigerant circuit 1112222222
Refrigerant Charge (3)
Circuit A & B (kg) Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
(1) at 7°C SST and 35°C ambiant
(2) per motor
(3) per circuit
(4) 5°C sat suction temp. - 60°C sat discharge temp.
(5) in accordance with ISO 3746

9
RAU-SVX01G-GB
Installation
Table 3 – R134a General data
RAU 190 RAU 260 RAU 300 RAU 350 RAU 400 RAU 450 RAU 500 RAU 600 RAU 700 RAU 800
R134a R134a R134a R134a R134a R134a R134a R134a R134a R134a
Performances (1)
Gross cooling capacity (1) (kW) 43.8 53.2 63.9 75.4 85.1 93.6 106.3 127.9 153.8 172.7
Power input in cooling (1) (kW) 12.1 15.8 18.5 21.3 24.3 27.7 31.5 37.0 47.1 53.9
Main Power supply 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50 400/3/50
Sound Power Level (5) (dB(A)) 86 87 89 89 90 90 90 92 98 98
Units
Amps
Nominal (4) (A) 31.2 38.2 45.2 53.3 60.3 67.3 75.4 89.4 116.4 130.4
Start-up Amps (A) 139 194 201 209 216 223 231 245 272 286
Max supply cable size (mm2)3535355050959595150150
Compressor
Number 2223334466
Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll
Model
10T+10T 10T+15T 2x15T 10+10T- 15T 10T+15T - 15T 15T+15T - 15T 2x(10T+15T) 2 x (15T+15T) 2x(10T+10T+15T) 2x(10T+15T+15T)
Number of speeds 1111111111
Number of motors C1 / C2 2 2 2 2 / 1 2 / 1 2 / 1 2 / 2 2 / 2 3 / 3 3 / 3
Rated Amps (2)(4) (A) 12.7 12.7 / 19.7 19.7 12.7 / 19.712.7 / 19.7 19.7 12.7 / 19.7 19.7 12.7 / 19.7 12.7 / 19.7
Locked rotor Amps (2) (A) 120 120 / 175 175 120 / 175 120 / 175 175 120 / 175 175 120 / 175 120 / 175
Motor RPM (rpm) 2900 2900 2900 2900 2900 2900 2900 2900 2900 2900
Sump Heater (2) (W)
50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V 50W - 400V
Liquid and Suction connection
Suction connection brazed 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 1”5/8 2”1/8 2”1/8
Liquid connection brazed 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 7/8” 1”1/8 1”1/8
Coil
Type Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin Plate Fin
Tube size (mm) 9.52 9.52 9.52 9.52 9.52 9.52 9.52 9.52 9.52 9.52
Tube type Smooth Smooth Smooth Smooth Smooth Smooth Smooth Smooth Smooth Smooth
Height (mm) 1219 1219 1219 1219 1219 1219 1219 1219 1219 1219
Length (mm) 2743 2743 2743 3455 4115 4115 5486 5486 5486 5486
Face Area (m2) 3.34 3.34 3.34 4.21 5.02 5.02 6.69 6.69 6.69 6.69
Rows # 2233332333
Fins per foot (fpf) # 156.0 156.0 156.0 156.0 156.0 156.0 156.0 156.0 156.0 156.0
Fan
Type Propeller Propeller Propeller Propeller Propeller Propeller Propeller Propeller Propeller Propeller
Number 2223334466
Diameter (mm) 962 962 962 962 962 962 962 962 962 962
Drive type Direct Direct Direct Direct Direct Direct Direct Direct Direct Direct
Number of speeds 1111111111
Air flow (m3/h) 27000 27000 25300 35900 37900 37900 54000 50700 89100 89100
Number of motors 2223334466
Motor HP (2) (kW) 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 1.88 1.88
Rated Amps (2) (A) 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 4.2 4.2
Locked rotor Amps (2) (A) 6.8 6.8 6.8 6.8 6.8 6.8 6.8 6.8 14.7 14.7
Motor RPM (rpm) 680 680 680 680 680 680 680 680 915 915
Dimensions
Height (mm) 1582 1582 1582 1582 1582 1582 1584 1584 1598 1598
Length (mm) 2061 2061 2061 2921 2921 2921 2225 2225 3090 3090
Width (mm) 995 995 995 995 995 995 1865 1865 1948 1948
Weight uncrated (kg) 514 584 650 810 900 926 1040 1168 1575 1634
Weight crated (kg) 555 625 691 869 959 985 1123 1251 1695 1754
System Data
Refrigerant circuit 1112222222
Refrigerant Charge (3)
Circuit A & B (kg) Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
Split
system
(1) at 7°C SST and 35°C ambiant
(2) per motor
(3) per circuit
(4) 5°C sat suction temp. - 60°C sat discharge temp.
(5) in accordance with ISO 3746

10 RAU-SVX01G-GB
Installation
Electrical connections
CAUTION!
1. The greatest care should be taken when cutting through passages and installing electric wiring. Under no
circumstances should chips of metal or cuttings of copper or isolating material fall into the starter panel or
electric components. Relays, contactors, terminals and control wiring should be covered and protected before
power supplies are connected.
2. Install power supply cabling as shown in wiring diagram. Adequate cable gland should be chosen, ensuring no
foreign bodies enter the electrical housing or components.
3. Cabling must comply with standards in force.The type and location of fuses must also comply with standards.
As a safety measure, fuses should be visibly installed, close to the unit.
4. Only copper wiring should be used. Using aluminium wires can produce galvanic corrosion and possibly lead to
superheat and failure of connection points.
As standard,Trane provides the single power supply which includes the transformer. Warranty reserves will be
formulated if a transformer, not supplied byTrane, is installed inside the electric panel.
Temperature sensor
Two temperature sensors are provided, in the control panel of the unit.They have to be fitted on site in order to
measure the air inlet and outlet temperature downstream to the DX coil (evaporator). Refer to supplied wiring
diagram for connection of sensors.
To place the sensor into the airflow, the technician will have to cut the cable between the electronic case and the
sensing element, and then reconnect both elements with a twisted pair cable with a maximum distance of 300m.
Hot gas-bypass control (option)
The hot gas bypass option only provides a relay contact needed to initiate hot gas bypass on the evaporator.
All the refrigerant piping modifications are not done in the factory and have to be done on the jobsite. An additional
refrigerant line and solenoid valve must be added on site (not provided) between the discharge line and the suction
line on Circuit 1. When the solenoid valve is activated, refrigerant vapor will flow from the discharge line to the
suction line.This refrigerant vapor satisfies the compressor mass flow requirement, but because no phase change
has occurred, this flow does not contribute to unit capacity.The amount of capacity shed by the hot gas bypass line
depends upon the size of the line (restriction) and the pressure difference between the discharge line and the suction
line. Closing the solenoid valve in the hot gas bypass line deactivates hot gas bypass.
Figure 3
1 = Air intake
2 = Fan
3 = Evaporating coil
4 = Air supply
5 = Evaporator leaving air temperature sensor
6 = Evaporator entering air temperature sensor
7 = Thermostatic expansion valve
8 = Sight glass
9 = Manual shut-off valve
10 = Filter dryer
11 = Liquid solenoid valve

11
RAU-SVX01G-GB
Installation
Functional description
The hot gas bypass solenoid valve will be controlled by a normally open (NO) relay output. Energizing the solenoid
will open the valve.
Freeze avoidance or evaporator limit will also operate while in the hot gas-bypass mode. Shutdown of the unit when
in hot gas-bypass due to evaporator limit will not result in any diagnostics and the unit will restart normally when
there is a need to run.
Total time spent in hot gas bypass mode will be recorded and available to the user.
Design details
The following rules will be applied to hot gas bypass operation, if hot gas bypass is installed and enabled.
1. Hot gas bypass will be opened when the circuit is running with compressors at the minimum (first) capacity step
and the control algorithm requires a further reduction in capacity.
2. Hot gas bypass will be closed at circuit startup.
3. Hot gas bypass will be closed when it is already open, but additional capacity is required.
4. Hot gas bypass will be closed and the circuit shut down if the unit has been running with hot gas-bypass for
more than the hot gas-bypass time limit.
5. Hot gas bypass will be closed and the compressor shut down if the saturated suction temperature for Circuit 1
gets below the Low RefrigerantTemperature Cutout + 0.5°C.
Capacity control modes
RAUL units support air temperature control and external capacity control (optional), which are described below.
At least one of these options must be configured.
Air temperature control (standard)
Units with an evaporator leaving air temperature sensor is capable of air temperature control. Air temperature
control is used on RAUL units if the external capacity control feature is not selected.
Air temperature control will require an active air temperature setpoint, based on a front panel air temperature
setpoint, an external air temperature setpoint, a BAS air temperature setpoint, and a local schedule air temperature
setpoint. These settings are displayed on DynaView andTechView similarly to the existing chilled water setpoint
values.
The capacity control method is identical to that used for chilled water control, with setting changes being used to
adjust the control appropriately.
External capacity control (option)
Optional replace air temperature control
External capacity control be a configurable option for RAUL units. The configuration options are as follows:
• Not Installed
• 2 Low Voltage Binary Inputs (2 capacity steps)
• 3 Low Voltage Binary Inputs (3 capacity steps)
• 4 Low Voltage Binary Inputs (4 capacity steps)
When in external capacity control mode, the unit is in AUTO command mode, and there is no need to run, “waiting
for need to run” submode is displayed.
Communication failure with any of the external capacity control hardware inputs will cause a shutdown of the unit if
the external capacity control feature is configured and enabled.
External capacity control overrides any other capacity control mode except manual control mode if enabled.

12 RAU-SVX01G-GB
General start-up
Start-up Preparation
Carry out all operations on check list and that the unit is correctly installed and ready to operate.
The installer must check all the following points before calling in theTrane Servicing Department to put the
equipment into service:
– Check position of unit.
– Check unit is level.
– Check type and position of rubber pads.
– Check clearance required for maintenance access (See submittals).
– Check clearance around condenser (See Submittals).
– Check Filter(s) dryer are present.
– Insure that thermostatic expansion valve(s) are well positioned.
– Insure that air discharge temperature sensors are well positioned.
– Insure that the isolation resistance of all power supply terminals to ground complies with standards and
regulations in force.
– Check that unit voltage and frequency supplied match rated input voltage and frequency.
– Check that all electrical connections are clean and sound.
– Check that main power supply switch is sound.
– On start-up of each motor in the system, check the direction of rotation and operation of all the components
they drive.
– Check that there is sufficient demand for cooling on the day of start-up (around 50% of nominal load).
Start-up
Follow the instructions below to correctly start-up the unit.
Installation and unit inspection:
– Ensure that all the operations above (start-up preparation), are followed.
Follow the instruction stuck inside the electrical cabinet:
– Unscrew the screws securing the isolators located under the rails supporting the compressor.
– Put the plexiglass supplied byTrane in front of the power terminal.
– Ensure all refrigerant valves are in service positions.
– Ensure that the unit is not damaged.
– Check fixing of capillary tubes (protection from vibration and from wear) and ensure that they are not damaged.
– Reset all manually set control devices.
– Check refrigerating circuits tightness.
Checking and setting:
Compressors:
– Check oil level at rest.The level should reach at least halfway up indicator located on housing. See fig. 4 for
correct level.
Figure 4 –
Compressor oil level
Max oil level
Min oil level

13
RAU-SVX01G-GB
General start-up
– Check fixing of capillary tubes (protection from vibration and from wear) and insure that they are not damaged.
– Reset all manually set control devices.
– Check refrigerating circuits tightness.
– Check oil acidity.
– Check electrical terminals tightening of the motors and in the control panel.
– Check the isolation of the motors using a 500V DC megohmeter which meets manufacturer’s specifications
(minimum value 2 megohms).
– Check the direction of the rotation using phasemeter.
Electrical power wiring:
– Check all the electrical terminals tightening.
– Set-up compressors overload relays.
– Set-up fan-motors overload relays.
Electrical control wiring:
– Check all the electrical terminals tightening.
– Check all the pressostats.
– Check and set-up the control module.
– Test and start-up without the electrical power.
Condenser:
– Check setting of the safety pressure valve.
– Check direction of the rotation of fans.
– Check the isolation of the motors using a 500V DC megohmeter which meets manufacturer’s specifications
(minimum value 2 megohms).
Operating parameters statement:
– Switch on main power supply switch.
– Start-up the unit by pushing auto on the control module screen.
– After unit start up, leave in operation for at least 15 minutes, to insure pressures are stabilized.
Then check:
– voltage.
– compressors and fan-motors currents.
– suction temperature and pressure.
– ambient air temperature.
– blowing air temperature.
– discharge pressure and temperature.
– liquid refrigerant temperature and pressure.
– operating parameters:
– superheat: difference between suction temperature and dew point temperature. Normal superheat must be within
5°C and 10°C.
– sub-cooling: difference between liquid temperature and bubble point temperature. Normal sub-cooling on
standard unit with R134a should be 5 to 10°C, and 2 to 5°C with 407c.
– difference between dew point temperature in high pressure and condenser air inlet temperature. Normal value on
standard unit with R134a and all the fans operating should be 15 to 18°C. With 407C, it should be 20 to 23°C.
Final check:
When the unit is operating correctly:
– Check that the unit is clean and clear of any debris, tools, etc…
– All valves are in operating position.
– Close control and starter panel doors and check panels fixation.

14 RAU-SVX01G-GB
Caution
– For the warranty to apply, any start-up carried out directly by the customer must be recorded in a detailed report,
which must be sent as soon as possible to the nearest Trane office.
– Do not start-up a motor whose insulation resistance is less than 2 meghoms.
– Phase imbalance should not be greater than 2%.
– The voltage supplied to motors should be within 5% of the rated voltage on the compressor nameplate.
– Excessive emulsion of the oil in the compressor shows that refrigerant is present in the oil and the result will be
that compressor is not lubricated enough. Shut down compressor and consultTrane technician.
– Excess oil in compressor can damage the compressor. Before adding oil, consultTrane technician. Use onlyTrane
products recommended.
– The compressors must operate in a single direction of rotation. If refrigerant high pressure remains stable
in the 30 seconds after compressor start-up, immediately shut down unit and check the direction of rotation
using phasemeter.
General start-up

15
RAU-SVX01G-GB
Operation
Control System
The control is through the CH530 control module.
Unit operations
– Start-up the unit by pushing «auto» on the control module screen.
Week end shutdown
– If the unit needs to be shut down for a short period of time, push the «stop» button of the module.
– If the unit is shut down for a longer period, see under ”Seasonal shutdown”, below.
– Insure that all safeties are taken to protect the compressor against refrigerant migration.
–Do not put the general and control disconnect switches to off.
Seasonal shutdown
– If the unit needs to be shut down for a short period of time, push the «stop» button of the module.
– Carry out leak test.
– Carry out oil analysis
– Record operating pressures, temperatures, amperages and voltage.
– Check operation of machines/ compare conditions of operation against original commissioning data.
– Push the “stop” button of the module.
– Insure that all safeties are taken to protect the compressor against refrigerant migration.
–Fill out the visit log sheet and review with the operator.
–Do not put the general and control disconnect switches to off.
Seasonal start-up
– Check operational set points and performance.
– Calibrate controls.
– Check operation of all safety devices.
– Inspect contacts & tighten terminals.
– Megger the motor compressor windings.
– Record operating pressures, temperatures, amperages and voltage.
– Carry out leak test.
– Check configuration of unit control module.
– Change the oil as required based upon results of the oil analysis made during seasonal shutdown.
– Check operation of machines/ compare conditions of operation against original commissioning data.
– Fill out the visit log sheet and review with the operator.

16 RAU-SVX01G-GB
Maintenance
The following maintenance instructions are part of maintenance operations required for this equipment. A qualified
technician is needed for regular maintenance as part of a regular maintenance contract.
Carry out all operations as required by schedule. This will insure long unit service life and reduce the possibility of
serious and costly breakdown.
Keep service records up to date, showing monthly information on unit operations.
These records can be of great help to maintenance personnel diagnostics. Similarly, if machine operator keeps a
log of changes in unit operating conditions, problems can be identified and solutions found before more serious
problems arise.
Inspection visit after the first 500 hours of operation from unit start up
– Carry out oil analysis.
– Carry out leak test.
–Inspect contacts and tighten terminals.
– Record operating pressures, temperatures, amperages and voltage.
– Check operation of machines/compare conditions of operation against original commissioning data.
– Fill out inspection visit log sheet and review with the operator.
Monthly preventive visit
– Carry out leak test.
– Oil test of acidity.
– Inspect contacts and tighten terminals.
– Record operating pressures, temperatures, amperages and voltage.
– Check operation of machines/ compare conditions of operation against original commissioning data.
– Fill out visit log sheet and review with the operator.
Annual preventive visit
– Check operational set points and performance.
– Calibrate controls.
– Check operation of all safety devices.
– Inspect contacts & tighten terminals.
– Megger the motor compressor windings.
– Record operating pressures, temperatures, amperages and voltage.
– Carry out leak test.
– Check configuration of unit control module.
– Carry out oil analysis.
– Change the oil as required based upon results of the oil analysis.
– Check operation of machines/compare conditions of operation against original commissioning data.
– Fill out the annual start up visit log sheet and review with the operator.
Caution
– Please refer to specificTrane documentation on oil, available from your nearest Trane office. Oils recommended by
Trane have been exhaustively tested in Trane laboratories to the specific requirement ofTrane unit and hence the
user’s requirements. Any use of oils not meeting specifications recommended byTrane is the responsibility of the
user only, who thereby is liable to warranty loss.
– Oil analysis and oil test acidity must be carried out by a qualified technician. Poor interpretation of results may
cause unit operating problems. Also, oil analysis must follow the correct procedures, to avoid accidental injury to
maintenance personnel.
– If the condensers are dirty, clean them with a brush. If the coils are too dirty, consult a cleaning professional.
Never use water to clean condenser coils.
– ContactTrane for information on maintenance contracts.
Warning
– Switch off unit main power supply before to any intervention. Failure to follow this safety instruction can lead to
accident death of the maintenance personnel and may also destroy equipment.
– Never use steam or hot water above 55°C to clean condenser coils.The resulting increasing pressure could cause
refrigerant loss.

17
RAU-SVX01G-GB
Installation checklist
INSTALLATION CHECKLIST
RAUL Trane Air Cooled Condensing Unit
This list must be checked off by the installer to ensure correct installation before the unit starts up.
Unit acceptance
❏Check for damage, if any, on transportation
❏Check for equipment shipped against delivery slip
❏Check lifting system
Unit positioning
❏Remove packaging
❏Check position of unit
❏Check unit is level
❏Check clearance around condenser
❏Check clearance required for maintenance access
❏Check position of rubber pads
Refrigerant circuit
❏Check filter dryer and sight glass presence
❏Check oil traps presence on discharge line (if there vertical risers>3m)
❏Check pitch for horizontal lines (1cm/m)
❏Check refrigerant presence
Electrical equipment
❏Check direction of rotation of compressors and fan motors
❏Check installation and rating of mains power switch/fuse
❏Check that electrical connections comply with specification
❏Check that electrical connections match information on manufacturer’s identification plate
❏Check electrical connections and connections to mains power switch
General
❏Check available cooling charge (50% of rated installation load)
❏Check with other trades handling installation works
Comments:...................................................................................................................................................................................
.......................................................................................................................................................................................................
.......................................................................................................................................................................................................
.......................................................................................................................................................................................................
Signature: ............................................................Name ............................................................................................................
Order N° ......................................................................................................................................................................................
Work site: ....................................................................................................................................................................................
Please return to your local Trane Service Office.

18 RAU-SVX01G-GB
Troubleshooting guide
These are simple diagnostic hints. If there is a breakdown, theTrane Service office should be contacted for
confirmation and assistance.
Problems symptoms Problem cause Action recommended
A) The compressor does not start up
Compressor terminals are live but motor
does not start
Motor burned out. Replace compressor
Contactor motor not operational. Coil burned out or broken contacts. Repair or replace.
No current ahead of motor contactor. a) Power cut.
b) Main power supply switched off.
Check fuses and connection.
See why system tripped.
If system is operational, switch on main
power supply.
Current ahead of fuse, but not on contactor
side.
Fuse blown. Check motor insulation. Replace fuse.
Low voltage reading on voltmeter. Voltage too low. Contact power Supply Utility.
Starter coil not excited. Regulation circuit open. Locate regulation device which has tripped
out and see why. See instructions concerning
this device.
Replace compressor.
Compressor does not run.
Compressor motor ”groans”.
High pressure switch tripped to contacts
open on high pressure.
Discharge pressure too high.
Compressor sticking
(damaged or sticking components).
Discharge pressure too high
See instructions for “discharge pressure
high”.
B) Compressor stops
High pressure switch tripped.
Over current thermal relay tripped. Discharge pressure too high. See instructions for “discharge pressure
high”.
a) Voltage too low.
b) Cooling demand too high, or condensing
temperature too high.
a) Contact Power Supply Utility.
b) See instruction “discharge pressure too
high”.
Motor temperature thermostat tripped.
Anti-freeze security tripped.
Not enough cooling fluid. Repair leak. Add refrigerant.
C) Compressor stops just after its start
Suction pressure too low.
Filter drier iced up.
Filter drier clogged. Replace filter drier.
D) The compressor keeps running
without stopping
Temperature too high in areas requiring air-
conditioning.
Excess load on cooling system. Check thermal insulation and air-tightness of
areas requiring air-conditioning.
E) Loss of oil in compressor
Oil level too low in indicator. Not enough oil. Contact Trane office before to order oil
Gradual fall in oil level.
Suction line too cold.
Compressor noisy
Filter drier clogged.
Liquid flows back to compressor.
Replace filter drier.
Adjust superheat and check bulb fixing of the
expansion valve.
F) Compressor noisy
Compressor knocks. Components broken in compressor. Change compressor.
Suction line abnormally cold. a) Uneven liquid flow.
b) Expansion valve locked in open position.
a) Check superheat setting and fixing of
expansion valve bulb.
b) Repair or replace.

19
RAU-SVX01G-GB
Troubleshooting guide
Problems symptoms Problem cause Action recommended
G) Insufficient cooling capacity
Thermostatic expansion valve ”whistles”. Not enough refrigerant. Check refrigerant circuit tightness and add
refrigerant.
Excess pressure drops through filter drier. Drier filter clogged. Replace.
Excessive superheat. Superheat not properly adjusted. Check adjustment of superheat and adjust
thermostatic expansion valve.
H) Discharge pressure too high
Condenser abnormally hot. Presence of uncondensable liquids in system,
or excess refrigerant.
Purge uncondensable fluids and drain off
excess refrigerant.
Condenser air output too hot. Reduced air flow. Air intake temperature
higher than specified for unit.
Clean battery.
Check operation of motor fans.
I) Suction pressure too high
Compressor operates continuously. Excess cooling demand on evaporator. Check system.
Suction duct abnormally cold. a) Expansion valve too far open. a) Check for superheat and check that
expansion valve bulb is secure.
b) Replace.
Refrigerant flows back to compressor. b) Expansion valve locked in open position.
J) Suction pressure too low
Excessive pressure drop through filter
drier. Refrigerant does not flow through
thermostatic expansion valve
Drier filter clogged.
Expansion valve bulb has lost its refrigerant.
Replace the deshydrator.
Replace the bulb.
Loss of power. Expansion valve obstructed. Replace.
Superheat too low. Excessive pressure drops through
evaporator.
Check adjustment of superheat and adjust
thermostatic expansion valve.
Note:
The above is not a comprehensive analysis of the Scroll compressor refrigeration system.The aim is to give
operators simple instructions on basic unit processes so that they have the technical knowledge to identify and bring
defective operations to the notice of qualified technicians.

20 RAU-SVX01G-GB
Performance Data
Performance data is given for Ambient air temperature versus Dew temperature at evaporating pressure. Refer to
point A on Figure 4.
Figure 5
A
B
C
D
E
R407C
Pressure
Condensing
Pressure Subcooling
Liquid Liquid
+
Vapour
Vapour
Enthalpy
Evaporating
Pressure
ADewTemperature at Evaporating Pressure
BDewTemperature at Condensing Pressure
CBubbleTemperature at Condensing Pressure
DLiquidTemperature at Condensing Pressure
EInletTemperature at Evaporating Pressure
Subcooling = C-D
Table 4 – Dew point and Bubble temperature versus pressure for R407C
Absolute
Pressure
(bar)
Dew
Temp.
(°C)
Bubble
Temp.
(°C)
Absolute
Pressure
(bar)
Dew
Temp.
(°C)
Bubble
Temp.
(°C)
Absolute
Pressure
(bar)
Dew
Temp.
(°C)
Bubble
Temp.
(°C)
Absolute
Pressure
(bar)
Dew
Temp.
(°C)
Bubble
Temp.
(°C)
0.2 -65.0 -72.5 2.7 -14.4 -20.9 6.0 7.8 1.7 27.0 62.8 58.8
0.3 -58.7 -66.1 2.8 -13.4 -20.0 6.5 10.2 4.2 28.0 64.4 60.5
0.4 -54.0 -61.3 2.9 -12.5 -19.1 7.0 12.6 6.6 29.0 65.9 62.1
0.5 -50.1 -57.3 3.0 -11.7 -18.2 7.5 14.8 8.9 30.0 67.4 63.7
0.6 -46.8 -54.0 3.1 -10.8 -17.3 8.0 16.8 11.0 31.0 68.8 65.3
0.7 -43.9 -51.0 3.2 -10.0 -16.5 8.5 18.8 13.0 32.0 70.2 66.8
0.8 -41.3 -48.4 3.3 -9.2 -15.6 9.0 20.7 15.0 33.0 71.6 68.3
0.9 -39.0 -46.1 3.4 -8.4 -14.8 9.5 22.6 16.9 34.0 72.9 69.7
1.0 -36.9 -43.9 3.5 -7.6 -14.0 10.0 24.3 18.7 35.0 74.2 71.1
1.1 -34.9 -41.9 3.6 -6.8 -13.3 11.0 27.6 22.1 36.0 75.5 72.5
1.2 -33.1 -40.0 3.7 -6.1 -12.5 12.0 30.7 25.3 37.0 76.7 73.9
1.3 -31.4 -38.3 3.8 -5.4 -11.8 13.0 33.6 28.3 38.0 77.9 75.2
1.4 -29.8 -36.7 3.9 -4.7 -11.0 14.0 36.4 31.1 39.0 79.1 76.5
1.5 -28.3 -35.1 4.0 -4.0 -10.3 15.0 39.0 33.8 40.0 80.2 77.8
1.6 -26.8 -33.7 4.1 -3.3 -9.6 16.0 41.4 36.4 41.0 81.3 79.1
1.7 -25.5 -32.3 4.2 -2.6 -8.9 17.0 43.8 38.8 42.0 82.4 80.3
1.8 -24.1 -30.9 4.3 -2.0 -8.3 18.0 46.0 41.2 43.0 83.4 81.5
1.9 -22.9 -29.6 4.4 -1.3 -7.6 19.0 48.2 43.4 44.0 84.3 82.7
2.0 -21.7 -28.4 4.5 -0.7 -7.0 20.0 50.2 45.6 45.0 85.2 83.9
2.1 -20.5 -27.2 4.6 0.0 -6.3 21.0 52.2 47.7 46.0 86.2 85.1
2.2 -19.4 -26.1 4.7 0.6 -5.7 22.0 54.2 49.7 47.0 87.1 86.2
2.3 -18.3 -25.0 4.8 1.2 -5.1 23.0 56.0 51.6 48.0 88.1 87.3
2.4 -17.3 -23.9 4.9 1.8 -4.5 24.0 57.8 53.5 49.0 89.1 88.4
2.5 -16.3 -22.9 5.0 2.4 -3.9 25.0 59.5 55.3 50.0 90.0 89.5
2.6 -15.3 -21.9 5.5 5.2 -1.0 26.0 61.2 57.1