Trane Air Compressor RTCA 108 216 User Manual
Installation  
Operation  
Maintenance  
RTUB 207-224 - Liquid chillers with  
helical rotary compressors  
RTCA 108-216 - Remote air-cooled  
condenser  
RLC-SVX03A-E4  
 
Contents  
Foreword  
2
2
2
2
2
Warranty  
Reception of unit  
Cautions and warnings  
Refrigerant  
General information  
Unit Inspection  
5
5
6
6
7
8
Inspection Checklist  
Loose Parts Inventory  
Description of the Unit  
General Data RTUB  
General Data RTCA  
Installation  
Installation Responsibilities  
Storage  
9
9
Special Lifting and Moving Instructions  
Isolation  
10  
10  
10  
11  
12  
12  
12  
13  
13  
14  
14  
14  
15  
Foundation  
Clearances  
Drainage  
Releasing the Nitrogen Holding Charge  
Water Connections (RTUB)  
Flow Switch Installation  
Water Pressure Gauges  
Refrigeration Safety Valves  
Water Pressure Relief Valves  
Installing and ConnectingTemperature Sensors  
Connecting RTUB with the Remote Air-cooled Condenser  
RLC-SVX03A-E4  
3
 
Contents  
Operation  
Pre-start Checkout  
21  
21  
21  
21  
22  
22  
22  
23  
23  
23  
23  
Unit Voltage Power Supply  
Unit Voltage Imbalance  
Unit Voltage Phasing  
Water System Flow Rates  
Water System Pressure Drop  
Daily Unit Start-up Procedure  
Seasonal Unit Start-up Procedure  
Temporary Shutdown and Restart  
Extended Shutdown Procedure  
System Restart after Extended Shutdown  
Maintenance  
Periodic Maintenance  
25  
27  
28  
28  
29  
29  
29  
Refrigerant and Oil Charge Management  
R134a Field-charging Procedure  
Charge Isolation on the High or Low Side of the System  
Filter Replacement Procedure  
Lubrication System  
Oil Charging Procedure  
Safety Recommendations  
Maintenance Contract  
Training  
32  
32  
32  
4
CG-PRC010-E4  
 
General information  
This manual describes installation,  
operation, and maintenance of RTUB  
and RTCA units.  
A separate manual is available for  
the use and maintenance of the  
RTUB controls (UCM-CLD).  
Unit Inspection  
When the unit is delivered, verify  
that it is the correct unit and that it is  
property equipped. Compare the  
information that appears on the unit  
nameplate with the ordering and  
submittal information. A typical unit  
nameplate is shown in Figure 1.  
Inspect all exterior components for  
visible damage. Report any apparent  
damage or material shortage to the  
carrier and make a "unit damage"  
notation on the carrier's delivery  
receipt. Specify the extent and type  
of damage found and notify the  
appropriateTrane Sales Office. Do  
not proceed with installation of a  
damaged unit without sales office  
approval.  
Inspection Checklist  
To protect against loss due to  
damage incurred in transit, complete  
the following checklist upon receipt  
of the unit.  
• Inspect the individual pieces of the  
shipment before accepting the unit.  
Check for obvious damage to the  
unit or packing material.  
• Inspect the unit for concealed  
damage as soon as possible after  
delivery and before it is stored.  
Concealed damage must be  
reported within 15 days.  
If concealed damage is discovered,  
stop unpacking the shipment. Do not  
remove damaged material from the  
receiving location.Take photos of the  
damage, if possible.The owner must  
provide reasonable evidence that the  
damage did not occur after delivery.  
• Notify the carrier's terminal of the  
damage immediately, by phone and  
by mail. Request an immediate,  
joint inspection of the damage with  
the carrier and the consignee.  
RLC-SVX03A-E4  
5
 
General information  
• Notify theTrane sales  
been assembled and wired in the  
representative and arrange for  
repair. Do not repair the unit,  
however, until damage is inspected  
by the carrier's representative.  
factory.The discharge piping is  
blocked at the oil separator outlet.  
Water connections - chilled water  
inlet and outlet - are blocked for  
transportation. Both RTUB and RTCA  
units are dried and vacuum-pumped  
in the factory, and contain a nitrogen  
holding charge when shipped.  
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 water vessel  
drain plugs, rigging and electrical  
diagrams, and service literature,  
which are placed inside the control  
panel and/or starter panel for  
shipment.  
Description of the Unit  
The RTUB units are liquid chillers  
equipped with two helical rotary  
compressors and an evaporator  
designed to operate with remote  
RTCA air-cooled condensers or other  
manufacturers' remote condensers.  
The RTUB is shipped once it has  
Figure 1 -Typical Unit Nameplates  
RTUB  
RTCA  
é
6
RLC-SVX03A-E4  
 
General information  
Table 1 - General data - RTUB  
Unit size  
207  
208  
210  
211  
212  
214  
Compressor  
Type/quantity  
Helical rotary/2  
Nominal size  
(tons)  
35/35  
40/40  
50/50  
60/50  
60/60  
70/70  
Evaporator  
Evaporator Model  
Water Storage  
Minimum Flow  
EG 120  
105  
4.5  
EG 120  
105  
4.5  
EG 140  
365  
6.0  
EG 170  
220  
7.0  
EG 170  
220  
7.0  
EG 200  
200  
9.0  
(l)  
(l/s)  
Maximum Flow  
Evaporator inlet diameter  
Evaporator outlet diameter  
Minimum Starting/  
Operating Ambient  
Refrigerant  
(l/s)  
(inches)  
(inches)  
13.4  
5
5
13.4  
5
5
18.0  
6
6
21.0  
6
6
21.0  
6
6
25.0  
6
6
(°C)  
5
R134a  
Number of Independent  
Refrigerant Circuits  
Percent Minimum Load  
Refrigerant Charge  
Oil Charge  
2
17  
(%)  
(kg)  
(l)  
26  
12  
26  
12  
40  
14  
40  
14  
40  
14  
40  
16  
Operating Weight  
Shipping Weight  
(kg)  
(kg)  
2130  
1860  
2130  
1860  
2845  
2570  
2845  
2570  
2845  
2570  
3250  
2975  
Unit size  
216  
217  
218  
220  
222  
224  
Compressor  
Type/Quantity  
Helical rotary/2  
Nominal size  
(tons)  
70/85  
85/85  
100/85  
100/100  
120/100  
120/120  
Evaporator  
Evaporator Model  
Water Storage  
Minimum Flow  
Maximum Flow  
Evaporator inlet diameter  
Evaporator outlet diameter  
Minimum Starting/  
Operating Ambient  
Refrigerant  
EG 200  
200  
9.0  
25.0  
6
EG 200  
200  
9.0  
25.0  
6
EG 250  
415  
11.0  
33.0  
6
EG 250  
415  
11.0  
33.0  
6
EG 340  
560  
14.0  
43.0  
6
EG 340  
560  
14.0  
43.0  
6
(l)  
(l/s)  
(l/s)  
(inches)  
(inches)  
6
6
6
6
6
6
(°C)  
5
R134a  
Number of Independent  
Refrigerant Circuits  
Percent Minimum Load  
Refrigerant Charge  
Oil Charge  
2
(%)  
(kg)  
(l)  
17  
46  
16  
40  
16  
40  
16  
46  
16  
50  
19  
50  
22  
Operating Weight  
Shipping Weight  
(kg)  
(kg)  
3250  
2975  
3250  
2975  
3880  
3405  
4050  
3575  
4480  
3855  
4550  
3925  
RLC-SVX03A-E4  
7
 
General information  
Table 2 - General data - RTCA  
Unit size  
108  
109  
111  
113  
115  
116  
Condenser  
Condenser type  
Fin spacing  
Frontal surface area  
Airflow  
Aluminium fins/copper tubes  
(fins/ft)  
(m²)  
168  
5.7  
168  
6.9  
144  
6.9  
168  
11.3  
168  
11.7  
144  
13.7  
3
Standard unit  
(m /h)  
42500  
34500  
50400  
40900  
69300  
56300  
77200  
62700  
84700  
68800  
98500  
80000  
3
Low noise unit  
Condenser fans  
Number of fans  
Fan speed  
(m /h)  
4
4
6
8
8
12  
Standard unit  
(rpm)  
(rpm)  
690  
560  
Low noise unit  
Nominal fan power  
Standard unit  
Low noise unit  
Current fan amps  
Standard unit  
Low noise unit  
Minimum Starting/  
Operating Ambient (1)  
Refrigerant  
(kW)  
(kW)  
0.85  
0.54  
(A)  
(A)  
2.4  
1.2  
(°C)  
7 Standard units/-18 Low ambient units  
R134a  
Number of Independent  
Refrigerant Circuits  
Refrigerant Charge  
Operating Weight (2)  
Shipping Weight (2)  
Hot gas connection  
Liquid connection  
1
22  
810  
1020  
1 5/8  
1 1/8  
1
26  
890  
1100  
1 5/8  
1 1/8  
1
36  
1090  
1300  
1 5/8  
1 1/8  
1
44  
1535  
1870  
1 5/8  
1 1/8  
1
52  
1770  
2170  
1 5/8  
1 1/8  
1
72  
2050  
2450  
1 5/8  
1 1/8  
(kg)  
(kg)  
(kg)  
(inches)  
(inches)  
Unit size  
208  
209  
211  
213  
215  
216  
Condenser  
Condenser type  
Fin spacing  
Frontal surface area  
Airflow  
Aluminium fins/copper tubes  
(fins/ft)  
(m²)  
168  
5.7  
168  
6.9  
144  
6.9  
168  
11.3  
168  
11.7  
144  
13.7  
3
Standard unit  
(m /h)  
42500  
34500  
50400  
40900  
69300  
56300  
77200  
62700  
84700  
68800  
98500  
80000  
3
Low noise unit  
Condenser fans  
Number of fans  
Fan speed  
(m /h)  
2 x 2  
2 x 2  
2 x 3  
2 x 4  
2 x 4  
2 x 6  
Standard unit  
(rpm)  
(rpm)  
690  
560  
Low noise unit  
Nominal fan power  
Standard unit  
Low noise unit  
Current fan amps  
Standard unit  
Low noise unit  
Minimum Starting/  
Operating Ambient (1)  
Refrigerant  
(kW)  
(kW)  
0.85  
0.54  
2.4  
1.2  
(°C)  
7 Standard units/-18 Low ambient units  
R134a  
Number of Independent  
Refrigerant Circuits  
Refrigerant Charge  
Operating Weight (2)  
Shipping Weight (2)  
Hot gas connection  
2
2
2
2
2
2
(kg)  
(kg)  
(kg)  
(inches)  
2 x 11  
810  
1020  
1 5/8  
1 1/8  
2 x 13  
890  
1100  
1 5/8  
1 1/8  
2 x 18  
1090  
1300  
1 5/8  
1 1/8  
2 x 22  
1535  
1870  
1 5/8  
1 1/8  
2 x 26  
1770  
2170  
1 5/8  
1 1/8  
2 x 36  
2050  
2450  
1 5/8  
1 1/8  
Liquid connection  
(inches)  
(1) Based on a 2.2 m/s wind across the condenser  
(2) With aluminium fins  
8
RLC-SVX03A-E4  
 
Installation  
• Install heat tape and insulate the  
chilled-water lines and any other  
portions of the system, as required,  
to prevent sweating under normal  
operating conditions or freezing  
during low-ambient temperature  
conditions.  
Installation responsibilities  
Generally, the contractor must do the  
following when installing an  
RTUB/RTCA unit.  
• Install the units on a flat  
foundation, level (within 1/4"  
[6 mm] across the length of the  
unit), and strong enough to support  
unit loading.  
• Start the unit under the supervision  
of a qualified service technician.  
• Install the units per the instructions  
contained in the Installation section  
of this manual.  
Storage  
If the chiller is stored for a long period  
of time prior to installation, the  
following precautionary measures must  
be taken:  
• Install any optional sensors and  
make electrical connections at the  
UCM-CLD.  
• Store the unit in a safe place  
sheltered from bad weather  
• Where specified for the RTUB,  
provide and install valves in the  
water piping upstream and  
downstream of the evaporator  
water connections, to isolate the  
evaporator for maintenance and to  
balance and trim the system.  
• At least every three months  
(quarterly), check the pressure in  
the refrigerant circuits to verify that  
the nitrogen holding charge is  
intact. If it is not, contact a qualified  
service organization and the  
• Furnish and install a flow switch  
and/or auxiliary contacts to prove  
chilled-water flow.  
appropriateTrane sales office.  
• Close the discharge and liquid-line  
isolation valves.  
• Furnish and install pressure gauges  
in the inlet and outlet piping of the  
evaporator (for RTUB).  
• Furnish and install a drain valve to  
the bottom of the evaporator water  
box (for RTUB).  
• Supply and install a vent cock to the  
top of the evaporator water box (for  
RTUB).  
• Furnish and install strainers ahead  
of all pumps and automatic  
modulating valves.  
• Furnish and install check valves on  
the discharge lines (between oil  
separators and condenser) in order  
to avoid any refrigerant migration  
leading to catastrophic damages to  
evaporator and/or compressor (due  
to freeze-up or liquid slugging).  
• Interconnect the RTUB and the  
remote condenser.  
• Provide and install field wiring.  
RLC-SVX03A-E4  
9
 
Installation  
Figure 2- Rigging the unit - RTUB 207-208  
Figure 3- Rigging the unit - RTUB 210-224  
Figure 4- Rigging the unit - RTCA 108-216  
Table 3 - Sling Lengths (mm) for lifting  
A
B
C
D
E
RTUB unit size  
207-208  
210-211-212  
214-216-217  
218-220  
2200  
2400  
2500  
2450  
2450  
3000  
3000  
3000  
3050  
3100  
2600  
2550  
2550  
2600  
2650  
2100  
3150  
3150  
3150  
3150  
-
3650  
3650  
3650  
3650  
222-224  
RTCA unit size  
108/109/111/208/209/211  
113/115/115/213/215/216  
2240  
2240  
1700  
2800  
1700  
2800  
-
-
-
-
conduit, use flexible electrical  
conduit. State and local codes on  
sound emissions should always be  
considered.  
Special Lifting and Moving  
Instructions  
ƽ WARNING  
To prevent any damage, position the  
lifting bar so that the slings do not  
touch the unit.  
A specific lifting method is  
recommended as follows:  
1. Four lifting points are built into the  
unit.  
Foundation  
Provide rigid, non-warping mounting  
pads or a concrete foundation of  
sufficient strength and mass to  
support the unit's operating weight  
(that is, including completed piping,  
and full operating charges of  
Isolation  
2. Slings and spreader bar to be  
provided by rigger and attached to  
the four lifting points.  
The most effective form of isolation  
is to locate the unit away from any  
sound-sensitive area. Structurally  
transmitted sound can be reduced by  
elastomeric vibration eliminators.  
Spring isolators are not  
3. Minimum rated lifting capacity  
(vertical) of each sling and  
spreader bar shall be no less than  
the tabulated unit shipping weight.  
refrigerant, oil, and water). After it is  
in place, the unit must be level  
within 1/4" [6 mm] over its length  
and width. Use shims if necessary.  
The manufacturer is not responsible  
for equipment problems resulting  
from an improperly designed or  
constructed foundation.  
Note for RTCA:The unit must be  
positioned so that the airflow  
through the condensation coils is not  
hindered by any obstacle.The  
recommended for units equipped  
with helical rotary compressors.  
Consult an acoustical engineer in  
critical sound applications. For  
maximum isolation effect, isolate  
water lines and electrical conduit.  
Wall sleeves and rubber- isolated  
piping hangers can be used to  
reduce the sound transmitted  
ƽ CAUTION  
This unit must be lifted with the  
utmost care. Avoid shock load by  
lifting slowly and evenly.  
through water piping.To reduce the  
sound transmitted through electrical  
10  
RLC-SVX03A-E4  
 
Installation  
condensation coils must be  
dimensions and recommended  
clearances. Unobstructed flow of  
condenser air is essential to maintain  
chiller capacity and operating  
efficiency.  
protected from side winds when  
their speed exceeds 16 km/h.  
Position the unit above the average  
height of snow observed in the  
region where it is installed. Never  
install temporary or permanent  
objects (tarp or roof) over the unit,  
because recycling of hot air would  
reduce the capacity of the  
Note for RTCA: When determining  
unit placement, give careful  
consideration to ensuring a sufficient  
flow of air across the condenser  
heat-transfer surface.  
condensation coils. Discharged air  
from the fans must not be  
obstructed. It is prohibited to install  
ducts for the fan discharge air (even  
short ones).This is because the fans  
supplied on standard units do not  
generate any additional static  
pressure.  
Clearances  
Provide enough space around the  
unit to allow the installation and  
maintenance personnel unrestricted  
access to all service points. Refer to  
Figure 5 andTable 4 for unit  
Figure 5: Unit Dimensions and  
Recommended Minimum  
Clearances - RTCA  
Figure 6: Unit Dimensions and  
Recommended Minimum  
Clearances - RTUB  
C
D
B
B
A
A
D
C
Table 4 - Unit Dimensions and Recommended Minimum Clearances (mm)  
Length  
2870  
4610  
5450  
2880  
4150  
4150  
4150  
Width  
2285  
2285  
2285  
890  
890  
890  
890  
Height  
1630  
1630  
1630  
1789  
1832  
1932  
2041  
A
B
C
D
RTCA 108/109/111/208/209/211  
RTCA 113/213  
RTCA 115/116/215/216  
RTUB 207/208  
RTUB 210/211/212/214/216/217  
RTUB 218/220  
RTUB 222/224  
1000  
1000  
1000  
950  
950  
950  
1000  
1000  
1000  
800  
800  
800  
1000  
1000  
1000  
1800  
2750  
2750  
2750  
1000  
1000  
1000  
500  
500  
500  
950  
800  
500  
RLC-SVX03A-E4  
11  
 
Installation  
boxes that can lead to premature  
failure of the water box.  
Drainage  
ƽ CAUTION  
Provide a large-capacity drain for  
water vessel drain-down during  
shutdown or repair.The evaporator  
is provided with a drain connection.  
All local and national codes apply.  
The vent on the top of the  
A vent line is located on the top part  
of the evaporator at the water return  
piping end. Install additional vent  
lines at the highest points in the  
piping to vent the air present in the  
chilled water circuit. Install  
manometers to monitor the pressure  
of chilled water entering and leaving  
the evaporator.  
Install a strainer in the evaporator-  
water inlet piping. Failure to do so  
can result in evaporator tube  
damage.  
Leaving Chilled-Water Piping  
evaporator water box is provided to  
prevent a vacuum, by allowing air  
into the evaporator for complete  
drainage.  
• Air vents (to bleed air from system).  
• Water pressure gauges with shutoff  
valves.  
• Vibration eliminators.  
• Shutoff (isolation) valves.  
•Thermometers (if desired).  
• Clean out tees.  
ƽ CAUTION  
To prevent damage to chilled-water  
components, do not allow  
evaporator pressure (maximum  
working pressure) to exceed 10.5  
bars.  
Releasing the Nitrogen  
Holding Charge  
The nitrogen holding charge can be  
released into the atmosphere.  
• Balancing valve.  
ƽ CAUTION  
When releasing nitrogen holding  
charge, ventilate the room. Avoid  
breathing in the nitrogen.  
Provide shutoff valves in lines to the  
gauges, in order to isolate them from  
the system when they are not in use.  
Use rubber vibration eliminators to  
prevent vibration transmission  
through the water lines. If desired,  
install thermometers in the lines to  
monitor entering- and leaving-water  
temperatures. Install a balancing  
valve in the leaving-water line to  
control water flow balance. Install  
shutoff valves on both the entering-  
and leaving-water lines so that the  
evaporator can be isolated for  
service. A pipe strainer must be  
installed in the entering water line.  
Failure to do so can allow  
• Flow Switch  
Evaporator Drain  
A 3/4" drain connection is located  
under the outlet end of the  
evaporator water box.This may be  
connected to a suitable drain to  
permit evaporator drainage during  
unit servicing. A shutoff valve must  
be installed on the drain line.  
Water Connections (RTUB)  
Thoroughly flush all water piping to  
the unit before making the final  
piping connections to the unit.  
ƽ CAUTION  
Evaporator Flow Switch (accessory)  
The chilled water flow is protected  
by the UCM-CLD without the  
assistance of a chilled water flow  
switch.The flow switch is optional,  
but if it is not installed, a signal must  
be sent to the chiller to indicate the  
water flow is established, for  
example the auxiliary contacts of the  
chilled water pump starter.  
If additional protection of the chilled  
water flow proves necessary,  
connect a flow switch installed on  
site, or a differential pressure switch  
to control the system's water flow.  
Connect the flow switch in series  
with the auxiliary contacts of the  
chilled water pump motor starter. A  
special connector is supplied with  
the unit, with the wiring diagrams.  
Some piping and control schemes,  
particularly those using a single  
water pump for both chilled- water  
and hot water, must be analyzed to  
determine how and/or if a flow-  
sensing device will provide the  
desired operation.  
If using an acidic commercial  
flushing solution, construct a  
temporary bypass around the unit to  
prevent damage to internal  
components of the evaporator.To  
avoid possible equipment damage,  
do not use untreated or improperly  
treated system water.  
When making the water connections,  
use flange connectors. Insulate all  
piping to reduce temperature  
increases and to prevent  
condensation. Figure 7 shows all the  
piping systems for the evaporator  
and its components.The  
waterborne debris to enter 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 in Figure 7.  
Entering Chilled-Water Piping  
arrangement of the pipes and the  
other components varies slightly  
according to the positioning of the  
connections and the water source.  
• Air vents (to bleed air from system).  
• Water pressure gauges with shutoff  
valves.  
• Vibration eliminators.  
• Shutoff (isolation) valves.  
•Thermometers (if desired).  
• Clean out tees.  
ƽ CAUTION  
The chilled water connections to the  
evaporator are Victaulic connections.  
Do not attempt to weld these  
connections, because the heat  
generated from welding can cause  
microscopic and macroscopic  
fractures on the cast- iron water  
• Pipe strainer.  
12  
RLC-SVX03A-E4  
 
Installation  
Follow the manufacturer's  
instructions for the installation  
procedures.  
4. Install a pipe strainer in the  
entering evaporator-water line to  
protect components from  
waterborne debris.  
use inTrane units. Use of either will  
lead to a shortened life to an  
indeterminable degree.TheTrane  
Company encourages the  
employment of a reputable water  
treatment specialist, familiar with  
local water conditions, to assist in  
this determination and in the  
establishment of a proper water-  
treatment program.  
Flow Switch Installation  
1. 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 flow.  
WaterTreatment  
ƽ CAUTION  
If calcium chloride is used for waste  
treatment, an applicable corrosion  
inhibitor must also be used. Failure  
to do so may result in damage to  
system components. Dirt, scale,  
products of corrosion, and other  
foreign material will adversely affect  
heat transfer between the water and  
system components. Foreign matter  
in the chilled-water system can also  
increase pressure drop and,  
consequently, reduce water flow.  
Proper water treatment must be  
determined locally, depending on the  
type of system and local water  
characteristics. Neither salt nor  
brackish water is recommended for  
Water Pressure Gauges  
Install field-supplied pressure  
components as shown in Figure 7.  
Locate pressure gauges or taps in a  
straight run of pipe; avoid placement  
near elbows, and so forth. Be sure to  
install the gauges at the same  
elevation on each shell if the shells  
have opposite-end water  
connections. Note: After the unit is  
installed at a site, one vertical (or one  
diagonal) unit support can be  
2.To prevent switch fluttering,  
remove all air from the water  
system. Note:The UCM-CLD waits  
for six seconds after a “flow loss”  
diagnosis before stopping the unit.  
Contact a qualified service  
representative if nuisance machine  
shutdowns persist.  
3. Adjust the switch to open when  
water flow falls below nominal.  
Evaporator data is given inTable 1.  
Flow-switch contacts are closed on  
proof of water flow.  
permanently removed if it creates an  
obstruction for water piping.To read  
Figure 7 -Typical piping of the evaporator (RTUB)  
1 Air vent  
2 Balance valve  
3 Flow switch  
4Thermometers  
5 Expansion joints  
6 Stop valves  
7 Manometer  
8 Evaporator  
9 Filter  
7
3
8
2
10 Drainage  
6
5
1
4
6
9
10  
RLC-SVX03A-E4  
13  
 
Installation  
Figure 8- RTUB Evaporator water pressure drops  
Evaporator Water Pressure Drop  
Water Flow Rate l/s  
the values given by the pressure  
gauges, open one valve and close  
the other.  
Install the sensor at 4 o'clock on the  
water piping to prevent any  
Water Pressure-Relief  
Valves  
condensation. When installing  
standard or optional temperature  
sensors described in the following  
paragraphs, comply with the  
instructions:  
Put thermocontact paste in each  
sensor bulbwell before inserting the  
sensor. All the temperature sensors  
installed on site have an  
identification number and a serial  
number marked on the part body.  
Also note that both sensors in each  
pair have the same serial number.  
ƽ CAUTION  
To prevent shell damage, install  
pressure-relief valves in the  
Refrigerant SafetyValves  
Discharge valves are an option for  
the RTUB. If installation requires this  
valve to be mounted, it is mandatory  
to install two safety valves: one  
between the compressor and the  
service valve and the other after the  
service valve to protect the  
evaporator water system. Install a  
water pressure-relief valve in the  
evaporator inlet piping, between the  
evaporator and the inlet shutoff  
valve. Water vessels with close-  
coupled shutoff valves have a high  
potential for hydrostatic pressure  
buildup on a water temperature  
increase. Refer to applicable codes  
for relief-valve installation  
condenser.  
ƽ CAUTION  
The safety valve calibration must not  
exceed 25 bars.The liquid line must  
be connected at the inlet to the drier  
filter which is supplied with a bend  
blocked by a brazed plug.The  
connection piping must be correctly  
dimensioned and installed, because  
these factors have a substantial  
impact on the system's performance  
and reliability.  
ƽ WARNING  
guidelines.  
To prevent degraded operation due  
to electrical interference, run the  
sensor cables in a duct. However, do  
not lay sensor cables with other  
cables whose voltage is greater than  
30 VAC.  
Installing and connecting  
temperature sensors  
General Recommendations  
Regardless of the type of monitoring  
sensor required by a particular  
application, the sensor must always  
be positioned far enough from the  
evaporator or condenser to enable  
the sensor to read a correct  
Extension of sensor power cable  
A temperature sensor's power cable  
may not be long enough to reach the  
UCM. If this is the case for your  
installation, connect the cable to a  
junction box installed in a more  
temperature for the mixed water.  
14  
RLC-SVX03A-E4  
 
Installation  
convenient position. Plug the sensor  
cable and the cable connected to the  
control panel into the junction box.  
The shielded cable can be cut to the  
required length.  
correctly, refer to the general  
recommendations. Connect the  
outside air sensor 5R3 to terminals 1  
and 2 on terminal board 1. Connect  
the condenser sensor 5R56-1 to  
terminals 4 and 5 on terminal board  
J4 on module A20-1. Connect the  
condenser sensor 5R56-2 to  
withstanding high temperatures  
without degradation.  
ƽ CAUTION  
A defect in fixing or insulating the  
condensation sensors may cause  
incorrect adjustment and/or damage  
to the compressor.  
Note:To lengthen the sensor's power  
cable, use 0.75 to 1.25 mm²  
conductors, 600V.The cable used  
between the junction box and the  
control panel must either be shielded  
or in a duct. If a shielded cable is  
used, make sure it is not used with  
other cables carrying 30 V or more.  
terminals 4 and 5 on terminal J4 on  
module A20-2.  
If the sensor cannot be mounted in  
the place where the saturated gas  
enters the sub-cooler, it must be  
positioned on the sub-cooler side  
and not on the condenser side. If the  
condenser temperature cannot be  
measured, it is preferable to  
measure the liquid temperature  
instead of the discharge  
If the condenser is not an RTCA,  
ambient temperature and condenser  
temperature sensors must be  
connected to the RTUB to monitor it.  
The ambient temperature sensor  
must be installed in a position which  
represents most accurately the  
condenser's surrounding  
environment. It must not be exposed  
to sunlight or precipitation. Ensure  
that the sensor is not located in the  
flow of recycled air from the  
Evaporator leaving water  
temperature sensor 5R51 (standard)  
Install this temperature sensor in the  
evaporator's leaving water piping  
system.To install it correctly, refer to  
the general recommendations.  
Connect this sensor to terminals  
X7-1 and X7-2.  
temperature.  
ƽ CAUTION  
To prevent interference, separate the  
sensor cables from the power cables.  
Evaporator entering water  
temperature sensor 5R52 (standard)  
Install this sensor in the evaporator  
water piping.To install it correctly,  
refer to the general  
recommendations. Connect this  
sensor across terminals X6-1 and  
X6-2.  
condenser discharge.The  
condensation temperature sensors  
must be installed on the refrigerant  
piping at the place where it leaves  
the condenser to enter the sub-  
cooler. It is necessary to install a  
condenser temperature sensor on  
each refrigerant circuit.This sensor  
must be fixed in compliance with the  
method used to attach the bulb for a  
thermostat expansion valve.This  
sensor can be fixed outside the  
piping if it is sufficiently insulated  
with insulation capable of  
Electrical connections  
performed by the installer  
All wiring must comply with local  
codes. Specific electrical schematics  
and connection diagrams are  
shipped with the unit.  
Condenser sensors 5R56-1, 5R56-2,  
5R3 (option)  
ƽ CAUTION  
If an RTCA condenser is used with an  
RTUB, the sensors required are  
installed on the RTCA.To install them  
To avoid corrosion and overheating  
at terminal connections, use copper  
conductors only. Failure to do so  
may result in damage to the  
equipment. Do not allow conduit to  
interfere with other components,  
structural members or equipment.  
Control voltage (110 V) wiring in  
conduit must be separate from  
conduit carrying low voltage (<30 V)  
wiring.To prevent control  
Figure 9: UCM water temperature sensor installation  
7
6
malfunctions, do not run low voltage  
wiring (<30 V) in conduit with  
conductors carrying more than 30 V.  
5
4
Connecting the RTUB with a remote  
air-cooled condenser  
2
1
The RTUB unit is shipped with a  
holding nitrogen charge and a  
separate oil charge.The RTCA  
condenser is designed to operate  
with the RTUB unit.To ensure  
optimum operation and  
3
1 In  
5 Compression fitting (Trane-supplied)  
6 Fitting body  
7 Clamping nut  
performance, the RTUB must be  
installed with the RTCA condenser. If  
2 Out  
3 UCM sensor  
4 ¼" NPT coupling (customer-supplied)  
RLC-SVX03A-E4  
15  
 
Installation  
Figure 10 - Detail of positions of refrigerant sensors 5R56-1 and 5R6-2  
another manufacturer's condenser in  
used, operation and performance  
may be degraded. Depending on the  
fan settings, malfunctioning may  
damage the RTUB due to instability  
of the high pressure.  
3
2
1
Sound and vibration attenuating  
device installation on the discharge  
lines is strongly recommended in  
order to avoid any acoustical  
annoyance and distubing vibrations  
leading to discharge line failures.  
57  
ƽ WARNING  
1 Sensor  
2 Connector  
3 Brazed connector on the condenser  
If the condenser connected to a dual-  
circuit RTUB is not an RTCA, it must  
comprise two refrigerant circuits,  
each with its own ventilation.The  
ventilation cannot be common to the  
two circuits.  
For this type of installation, (non-  
RTCA condenser), an On/Off signal is  
available on the unit control module  
(UCM) of the RTUB for each  
refrigerant circuit, indicating whether  
the fans on each condenser circuit  
are on or off.The now autonomous  
control of the fan on each condenser  
circuit must comprise the following  
staging:  
For an ambient temperature between  
0 and 40°C, there must be four  
airflow control stages for each circuit  
(i.e. 25% of the nominal airflow in  
each stage).  
16  
RLC-SVX03A-E4  
 
Installation  
Figure 11: Units on the same level  
1
2
Limitations:The distance between the two units must not exceed 60 m in reality or the equivalent of 90 m taking into  
account pressure drops.The height of the liquid line in relation to the unit base must be less than 5 m. It is  
recommended to place a trap on the discharge line at the oil separator outlet, if this discharge line is horizontal for a  
distance greater than 5 m, at a height greater than the connection to the oil separators.  
Figure 12: RTCA (or other manufacturer's condenser) above the RTUB  
4
Limitations:The distance between the two units must not exceed 60 m in reality or the equivalent of 90 m taking into  
account pressure drops. Each 30 m level difference causes a 2% efficiency loss.  
RLC-SVX03A-E4  
17  
 
Installation  
Figure 13: RTCA (or other manufacturer's condenser) below the RTUB  
3
Limitations:The distance between the two units must not exceed 60 m in reality or the equivalent of 90 m taking into  
account pressure drops.The height of the liquid line in relation to the condenser base must be less than 5 m.  
Legend for Figures 11-12-13:  
1 Discharge line connections  
2 Liquid line connections  
3Trap  
4 Counter-trap  
18  
RLC-SVX03A-E4  
 
Installation  
Equivalent pressure drops  
To correctly determine the size of the  
liquid and discharge lines for  
connection on site, it is first  
necessary to establish the equivalent  
pressure drops for each line,  
The minimum slope of the suction  
line to the condenser must be 5%.  
Isolate refrigerant fluid lines from the  
building to prevent the vibrations  
normally generated by the ducts  
from being transmitted to the  
comprising the additional flow  
resistances, from bends, valves, etc.  
As a first approximation, we can  
estimate the equivalent pressure  
drops at 1.5 times the piping length.  
building's structure. Also avoid  
bypassing the unit's isolation system  
by fixing the refrigerant fluid lines or  
the electrical ducts very rigidly. Any  
vibrations may be propagated into  
the building via rigid piping or lines.  
Size of the liquid line  
The standpipe must not be more  
than 5 m above the air-cooled  
condenser base. It is not necessary  
to slope the liquid line. It is  
recommended to have a line  
diameter as small as possible, while  
maintaining an acceptable pressure  
drop so as to minimize the  
refrigerant charge (length and  
maximum pressure drops defined  
above).  
Pressure tests and leak  
detection  
ƽ WARNING  
During these operations, take the  
following precautions:  
1. Do not use oxygen or acetylene  
instead of the refrigerant fluid and  
nitrogen to detect leaks.This may  
cause a violent explosion.  
Determine the size using the  
following criteria:  
1. Operating conditions with full load  
2. Always use the expansion valve,  
safety valves and manometers to  
control the test pressure in the  
system. Excessive pressure may  
cause piping to rupture, damage  
the unit or cause explosion  
2. Maximum pressure drops of  
100-kPa  
3. Liquid speed not exceeding 3 m/s  
(to prevent liquid shocks)  
resulting in personal injury.  
In normal operating conditions  
(suction temperature 4.5°C,  
condenser air inlet temperature 35°C  
or condensation temperature of  
52°C), the liquid leaving the  
condenser is sub-cooled by  
approximately 10°C.Take this value  
as a basis to determine the  
maximum permitted pressure drops,  
and use it to calculate the liquid line  
pressure drops.  
Carry out the liquid line and hot gas  
line pressure tests using the  
standards in force.The test pressure  
applied to the liquid line and the  
discharge line must comply with  
local regulations. Insert enough  
refrigerant fluid into the circuit to  
obtain a pressure of 1 bar.  
By injecting dry nitrogen using a  
pump, increase this pressure to  
7 bars. Look for leaks in the entire  
system using a detector.  
If leaks are detected, evacuate the  
fluid from the system and repair the  
defective component. Repeat the test  
process to check the repair is  
watertight.  
Discharge line  
Install them so as to obtain a gas  
speed in the horizontal and vertical  
lines making it possible to carry  
along the compressor oil. Determine  
the dimensions of the suction line  
using the following criteria:  
1. 2.5 m/s (minimum) in the  
horizontal parts  
2. 5.0 m/s (minimum) in the vertical  
parts  
3. Maximum speed 20 m/s  
RLC-SVX03A-E4  
19  
 
Installation  
Vacuum pumping  
Do not use rubber or synthetic pipes  
which retain humidity, increase the  
duration of the vacuum pumping  
and cause pressure rises during the  
vacuum tests. An electronic vacuum  
measurement manometer must be  
installed upstream of the vacuum  
pump stop valve.  
1. Close valve B and open valve A.  
After a few minutes, the  
manometer reading indicated the  
lowest vacuum level that can be  
obtained by the pump.  
For this operation, use a vane pump  
making it possible to obtain a partial  
vacuum or 100 microns or less.  
When pumping out to create a  
vacuum, it is important to connect  
the pump to the high and low  
pressure sides of the system. Follow  
the pump manufacturer's  
recommendations.The pipes used to  
connect the pump to the system  
must be made of copper, with the  
largest diameter possible. A large  
pipe diameter reduces flow  
2. Open valve B and operate the  
vacuum pump until 1500 Hg  
microns (0.67 mbar) or less is  
obtained. Close valve A when you  
read the manometer.  
resistance and shortens the duration  
of the vacuum pumping.  
3. Once the value of 500 microns or  
less has been reached and valve A  
has been closed, the pressure will  
rise.  
The maximum permissible increase  
is 200 microns after 15 minutes. If  
this limit is exceeded and the value  
remains constant, there is too much  
humidity in the system. A continuous  
increase in pressure indicates there  
is a leak in the system.  
Figure 14 -Vacuum pump connection  
2
1
4
6
5
3
1 Header  
2Valve B  
3Vacuum pump  
4Vacuum manometer  
5Valve A  
6 Low pressure side  
7 High pressure side  
7
20  
RLC-SVX03A-E4  
 
Operation  
Do not use untreated or improperly-  
treated water. Equipment damage  
may occur.  
• Energize the compressor and oil  
separators 24 hours prior to unit  
startup.  
Pre-start checkout  
Installation Checklist  
When installation is complete, but  
prior to putting the unit into service,  
the following pre-start procedures  
must be reviewed and verified:  
• Fill the evaporator chilled-water  
circuit. Vent the system while it is  
being filled. Open the vents on the  
top of the evaporator water box  
while filling and close when filling  
is completed.  
UnitVoltage Power Supply  
Voltage to the unit must meet the  
criteria given in the Installation  
section. Measure each leg of the  
supply voltage at the main power  
fused-disconnect switch for the unit.  
If the measured voltage on any leg is  
not within the specified range, notify  
the supplier of the power and correct  
the situation before operating the  
unit.  
• Inspect all wiring connections to be  
sure they are clean and tight.  
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-  
ƽ WARNING  
Disconnect all electric power,  
including remote disconnects, before  
servicing. Failure to disconnect  
power before servicing can cause  
severe personal injury or death.  
treatment specialist should be  
engaged to determine what  
ƽ CAUTION  
treatment, if any, is advisable.Trane's  
warranty specifically excludes  
liability of corrosion, erosion, or  
deterioration ofTrane equipment.  
Trane assumes no responsibilities for  
the results of the use of untreated or  
improperly-treated water, or saline or  
brackish water.  
Provide adequate voltage to the unit.  
Failure to do so can cause control  
components to malfunction and  
shorten the life of relay contact,  
compressor motors and contactors.  
ƽ CAUTION  
• Check the tightness of all  
connections in the compressor  
power circuit (disconnects, terminal  
block, contactors, compressor  
junction box terminals,…). Loose  
connections can cause overheating  
at the connections and  
UnitVoltage Imbalance  
Excessive voltage imbalance  
between the phases of a three-phase  
system can cause motors to  
overheat and eventually fail.The  
maximum allowable imbalance is  
2%. Voltage imbalance is determined  
using the following calculations:  
• Close the fused-disconnect  
switch(es) that supplies power to  
the chilled-water pump starter.  
undervoltage conditions at the  
compressor motor.  
• Start the chilled-water pump to  
begin circulation of the water.  
Inspect all piping for leakage and  
make any necessary repairs.  
• Open all refrigerant valves in the  
discharge, liquid, oil, and oil return  
lines.  
% Imbalance = [(Vx - V ave) x 100]/V  
ave  
ƽ CAUTION  
• With water circulating through the  
system, adjust the water flow and  
check the water pressure drop  
through the evaporator.  
V ave = (V1 + V2 + V3)/3  
Do not operate the unit with the  
compressor, oil discharge, liquid-line  
service valves, or the manual shutoff  
on the refrigerant supply to the  
auxiliary coolers "CLOSED." Failure  
to have these "OPEN" may cause  
serious compressor damage.  
Vx = phase with the greatest  
difference from V ave (without  
regard to the sign)  
• Adjust the chilled-water flow switch  
for proper operation.  
For example, if the three measured  
voltages are 391, 407, and 402 volts,  
the average would be:  
ƽ WARNING  
(391+407+402)/3 = 400  
• Check the power-supply voltage to  
the unit at the main-power fused-  
disconnect switch. Voltage must be  
within the voltage utilization range  
and also stamped on the unit  
nameplate. Voltage imbalance must  
not exceed 2%.  
Use extreme caution when  
performing the following procedure  
with power applied. Failure to do so  
can result in personal injury or  
death.  
The percentage of the imbalance is  
then:  
[100(400-391)]/400 = 2.25%  
This exceeds the maximum  
allowable (2%) by 0.25%  
• Reapply power to complete the  
procedures.  
UnitVoltage Phasing  
• Check the unit power phasing L1-  
L2-L3 in the starter to ensure that it  
has been installed in an "A B-C"  
phase sequence.  
• Prove all Interlock and  
It is imperative that L1, L2, and L3 in  
the starter be connected in the A-B-C  
phase sequence to prevent  
equipment damage due to reverse  
rotation.  
Interconnecting Wiring Interlock  
and External as described in the  
Installation section.  
ƽ CAUTION  
Improper power phasing can result  
in equipment damage due to reverse  
rotation.  
• Check and set, as required, all  
UCM-CLD menu items.  
It is important that proper rotation of  
the compressors be established  
before the unit is started. Proper  
• Stop the chilled-water pump.  
RLC-SVX03A-E4  
21  
 
Operation  
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 phased A-B-C.  
Do not interchange any load leads  
that are from the unit contactors or  
the motor terminals. Doing so may  
damage the equipment.  
control calls for cooling and all the  
safety interlocks are closed, the unit  
will start.The compressor(s) will  
load and unload in response to the  
temperature of the leaving chilled-  
water temperature.  
7. Reopen the unit disconnect and  
disconnect the phase-sequence  
indicator.  
When rotation is clockwise, the  
phase sequence is usually called  
"ABC;" when counterclockwise,  
"CBA."This direction may be  
reversed outside the alternator by  
interchanging any two of the line  
wires. It is this possible interchange  
of wiring that makes a phase  
After the system has been operating  
for approximately 30 minutes and  
has become stabilized, complete the  
start-up procedure as follows:  
Water-System Flow Rates  
Establish a balanced chilled-water  
flow through the evaporator.The flow  
rates should be between the  
minimum and maximum values  
given on the pressure-drop curves.  
• Check the evaporator refrigerant  
pressure and the condenser  
refrigerant pressure in the  
Refrigerant report of the UCM-CLD.  
Water-System Pressure Drop  
sequence indicator necessary if the  
operator is to quickly determine the  
phase rotation of the motor.  
Measure the water-pressure drop  
through the evaporator at the field-  
installed pressure taps on the system  
water piping. Use the same gauge for  
each measurement. Do not include  
valves, strainers, or fittings in the  
pressure-drop readings.  
• Measure the system overheat.  
• Measure the system subcooling.  
1. Press the Stop key on the UCM-  
CLD.  
A shortage of refrigerant is indicated  
if the operating pressures and the  
subcooling are low. If the operating  
pressures, superheat, and  
subcooling readings indicate a  
refrigerant shortage, gas-charge  
refrigerant into each circuit as  
required. With the unit running, add  
refrigerant vapor by connecting the  
charging line to the suction service  
valve and charging through the  
backseat port until operating  
2. Open the electrical disconnect or  
circuit protection switch that  
provides line power to the line-  
power terminal block(s) in the  
starter panel (or to the unit-  
mounted disconnect).  
Start-up Procedures  
Daily Unit Start-up Procedure  
When the verification operations  
prior to start-up have been performed  
(see previous sections), the unit is  
ready to start.  
3. Connect the phase-sequence  
indicator leads to the line power  
terminal block as follows:  
Phase Sequence LeadTerminal  
Black (Phase A) L1  
conditions become normal.  
• Press the Stop key on the UCM-CLD.  
• If necessary, adjust the setpoint  
values in the UCM-CLD reports  
(refer to the UCM-CLD user guide).  
ƽ WARNING  
Red (Phase B) L2  
If both suction and discharge  
pressures are low and subcooling is  
normal, a problem other than  
refrigerant shortage exists. Do not  
add refrigerant, as this may result in  
overcharging the circuit.  
Yellow (Phase C) L3  
• Close the fused disconnect switch  
for the chilled water pumps and the  
cooling water pumps.  
4.Turn power on by closing the unit  
supply-power fused-disconnect  
switch.  
• Energize the pumps to start the  
water circulation.  
5. Read the phase sequence on the  
indicator.The "ABC" LED on the  
face of the phase indicator will  
glow if the phase is "ABC."  
Only use the refrigerant specified on  
the unit nameplate.  
• Check the service valves on the  
discharge line, suction line, oil line  
and liquid line for each circuit.  
These valves must be open before  
starting the compressors.  
• If operating conditions indicate a  
refrigerant overcharge, remove  
refrigerant at the liquid line service  
valve. Allow refrigerant to escape  
slowly to minimize oil loss. Do not  
discharge refrigerant into the  
atmosphere.  
ƽ WARNING  
To prevent injury or death due to  
electrocution, take extreme care  
when performing service procedures  
with electrical power energized.  
ƽ WARNING  
To prevent compressor damage, do  
not operate the unit until all  
refrigerant and oil-line valves are  
opened.  
6. If the "CBA" indicator glows  
instead, open the unit main-power  
disconnect and interchange two  
line leads on the line-power  
terminal block(s) (or the unit-  
mounted disconnect). Close the  
main-power disconnect and  
recheck the phasing.  
ƽ WARNING  
Do not allow refrigerant to directly  
contact skin, or injury from frostbite  
may result.  
• Verify that the chilled water pump  
runs for one minute after the chiller  
is commanded to stop for normal  
chilled water systems).  
Overheating  
Normal overheating for each circuit  
is approximately 3-4°C at full  
• Press the Auto key. If the chiller  
22  
RLC-SVX03A-E4  
 
Operation  
operating load. Overheating may  
vary slightly on the circuit if the  
system load is lower, when the slide  
valve is moving.  
and damage to the system when it  
has been set up for extended  
shutdown.  
Shutdown procedures  
Temporary Shutdown and Restart  
To shut the unit down for a short  
time, use the following procedure:  
5. At least every three months  
(quarterly), check the refrigerant  
pressure in the unit to verify that  
the refrigerant charge is intact.  
Overheating must stabilize at  
approximately 4°C when the above  
components have stabilized.  
1. Press the Stop key on the UCM-  
CLD.The compressors will  
continue to operate and, after  
unloading for 20 seconds, will stop  
when the compressor contactor  
de-energizes.  
Subcooling  
ƽ CAUTION  
Normal subcooling for each circuit  
ranges from 8-10°C, depending on  
the units. If subcooling for either  
circuit does not fall within these  
values, check the overheating for the  
circuit and adjust if necessary. If  
overheating is normal but  
During an extended shutdown  
period, especially over the winter  
season, the evaporator must be  
drained of water, if the chilled water  
loop does not contain glycol, to  
prevent any risk of evaporator freeze-  
up.  
2) Stop the water circulation by  
disconnecting the power supply to  
the chilled water and cooling  
water pumps.  
subcooling is not, contact a qualified  
service technician.  
ƽ CAUTION  
System Restart After Extended  
Shutdown  
Under freezing conditions, the chilled  
water pump must remain in  
operation during the full shutdown  
period of the chiller if the chilled  
water loop does not contain glycol,  
to prevent any risk of evaporator  
freeze-up.  
Seasonal Unit Start-up  
1. Close all valves and reinstall the  
drain plugs in the evaporator.  
1. Verify that the liquid-line service  
valves, oil line, compressor  
discharge service valves, and  
suction service valves are open  
(backseated).  
2. Service the auxiliary equipment  
according to the startup and  
maintenance instructions provided  
by the respective equipment  
manufacturers.  
ƽ CAUTION  
Extended period shutdown  
The procedure below must be  
performed if the system has to be  
stopped for a prolonged period, for  
example seasonal shutdown.  
To prevent damage to the  
compressor, ensure that all  
refrigerant valves are open before  
starting the unit.  
3. Close the vents in the evaporator  
chilled-water circuits.  
4. Open all the valves in the  
evaporator chilled-water circuits.  
1.Test the unit for refrigerant leakage  
and repair as necessary.  
2. Check the oil separator oil level  
(see Maintenance section).  
5. Open all refrigerant valves to  
verify they are in the open  
condition.  
2. Open the electrical disconnect  
switches for the chilled-water  
pump. Lock the switches in the  
"Open" position.  
3. Fill the evaporator water circuit.  
Vent the system while it is being  
filled. Open the vent on the top of  
the evaporator and condenser  
while filling, and close it when  
filling is completed.  
6. If the evaporator was previously  
drained, vent and fill the  
evaporator and chilled-water  
circuit. When all air is removed  
from the system (including each  
pass), install the vent plugs in the  
evaporator water boxes.  
ƽ CAUTION  
Lock the chilled-water pump  
disconnects open to prevent pump  
damage.  
ƽ CAUTION  
Do not use untreated or improperly  
treated water. Equipment damage  
may occur.  
4. Close the fused-disconnect  
switches that provide power to the  
chilled-water pump.  
3. Close all chilled-water supply  
valves. Drain the water from the  
evaporator.  
ƽ CAUTION  
Ensure that the compressor and oil-  
separator heaters have been  
operating for a minimum of 24 hours  
before starting. Failure to do so may  
result in equipment damage.  
4. Open the unit main electrical  
disconnect and unit-mounted  
disconnect (if installed) and lock in  
the "Open" position. If the optional  
control-power transformer is not  
installed, open and lock the 115 V  
disconnect.  
5. Start the evaporator water pump  
and, while water is circulating,  
inspect all piping for leakage.  
Make any necessary repairs before  
starting the unit.  
7. Check the adjustment and  
operation of each safety and  
operating control.  
8. Close all disconnect switches.  
6. While the water is circulating,  
adjust the water flows and check  
the water pressure drops through  
the evaporator. Refer to "Water-  
ƽ CAUTION  
Lock the disconnects in the "Open"  
position to prevent accidental startup  
9. Refer to the sequence for daily  
unit startup for the remainder of  
the seasonal startup.  
RLC-SVX03A-E4  
23  
 
Operation  
System Flow Rates" and "Water-  
System Pressure Drop."  
7. Adjust the flow switch on the  
evaporator piping for proper  
operation.  
8. Stop the water pump.The unit is  
now ready for startup as described  
in "Startup Procedures."  
24  
RLC-SVX03A-E4  
 
Maintenance  
Perform all maintenance procedures  
and inspections at the recommended  
intervals.This will prolong the life of  
the chiller and minimize the  
possibility of costly failures. After the  
unit has been operating for  
approximately 30 minutes and the  
system has stabilized, check the  
operating conditions and complete  
the following procedures:  
components for deficiencies.  
Chemical Cleaning of the Evaporator  
(RTUB)  
5. Inspect all piping components for  
leakage and damage. Clean out  
any inline strainers.  
The chilled water circuit is a closed  
circuit, and therefore should not  
accumulate scale or sludge. If the  
chiller becomes obstructed, you can  
attempt to unblock it by reversing  
the water flow direction. If  
6. Clean and repaint any areas that  
show signs of corrosion.  
7. Clean the condenser coils.  
unsuccessful after several attempts,  
clean the evaporator chemically.  
ƽ WARNING  
Weekly Maintenance  
While the unit is running in stable  
conditions:  
Position all electrical disconnects in  
the "Open" position and lock them  
to prevent injury or death due to  
electrical shock.  
ƽ WARNING  
Do not use an acid cleaning product  
which might damage steel,  
galvanized steel, polypropylene and  
copper parts.  
Contact a local water treatment  
company advice on a suitable  
chemical product for this unit. The  
supplier of the cleaning product  
must supply or approve:  
1. Check the UCM pressure for  
Evaporator, Condenser, and  
Intermediate Oil.  
8. Check and tighten all electrical  
connections as necessary.  
2.Measure the subcooling entering  
the EXV.The subcooling should  
never be less than 2.2°C under any  
circumstances.  
Coil Maintenance  
Because seacoast applications are  
considered to be a "dirty"  
environment for condenser coils, it is  
logical that the coils will need to be  
cleaned more often than a coil  
located inland. Cleaning four times a  
year may be required or even more if  
conditions are very poor or if  
corrosion damage begins to occur.  
To clean the coils, use a soft brush  
and a sprayer (garden pump-up  
type). A high-quality detergent, such  
as "Trane Coil Cleaner, CHM0021" is  
recommended for both standard and  
coils with aluminium coating.  
Follow the directions included with  
the detergent. The most effective  
method of coil cleaning is to remove  
the condenser end panels and clean  
the coils from the inside out using  
the sprayer.  
• All devices used in the circuit  
ƽ CAUTION  
Also check the rest of the system  
operating conditions.  
•The quantity of chemical product to  
use  
•The duration for which the chemical  
product must circulate in the  
evaporator  
3. Inspect the entire system for  
unusual conditions and inspect the  
condenser coils for dirt and debris.  
If the coils are dirty, refer to coil  
cleaning.  
• Safety precautions and  
recommendations for using and  
handling the chemical product  
Monthly Maintenance  
1. Perform all weekly maintenance  
procedures.  
Replacing the Oil Filter  
Note: Routine changing of the oil or  
oil filter is not recommended. The oil  
filter is oversized for this application  
and should not require replacement.  
The oil and filter should be replaced  
only if analysis reveals that the oil is  
contaminated. Oil type and system  
capacities are shown inTable 1.  
Pressure drop across the oil filter is  
shown in Figure 15. Oil filter  
pressure drop is the difference  
between the two pressure-control  
ports.  
2. Record the system subcooling.  
3. Record the system superheat.  
4. Make any repairs necessary.  
Annual Maintenance  
1. Perform all weekly and monthly  
procedures.  
ƽ CAUTION  
If the detergent used is strongly  
alkaline (pH greater than 8.5), an  
inhibitor must be added.  
Rinse the coil thoroughly after  
cleaning. Failure to completely flush  
the detergent from the coil can result  
in accelerated coil corrosion. Blow  
excess water from the coil using low-  
pressure air. The water used to clean  
the coils should always be clean,  
fresh water (it should not be  
2. Check the oil sump oil level while  
the unit is off.  
Note: Routine changing of the oil is  
not required. Use an oil analysis to  
determine the condition of the oil.  
To change the oil filter in the unit,  
refer to Figure 15 and follow the  
steps listed.  
3. Have a qualified laboratory  
perform a compressor oil analysis  
to determine system moisture  
content and acid level.This  
analysis is a valuable diagnostic  
tool.  
brackish, or contain excessive  
dissolved minerals, chlorine, or  
water softener salts.)  
4. Contact a qualified service  
organization to leak-test the chiller,  
to check operating and safety  
controls, and to inspect electrical  
RLC-SVX03A-E4  
25  
 
Maintenance  
Figure 15 - Oil filter change  
12. Charge the unit with refrigerant  
R134a refer to charging  
procedure).  
For units with the discharge valve  
option:  
1. Close the angle valve placed on  
the refrigerant liquid line to store  
the refrigerant in the condenser.  
1. Oil charging valve  
2. Oil pressure control port  
3. Oil pressure control port  
2. After the compressor stops, close  
the compressor discharge valve  
and disconnect the unit.  
Note: Do not make successive  
vacuums by using the compressor.  
Irreversible compressor damage  
could occur.  
3. Vacuum the remaining refrigerant  
in the evaporator.  
Figure 16 - Oil filter pressure drop  
4. Remove the seven bolts on the oil  
filter cover. A pan may be  
necessary to catch any oil that is  
released after the cover is  
loosened.  
Normal pressure drop  
Maximum pressure drop  
5. Remove the cover and the oil filter  
element.  
6. Install the new filter element.  
7. Coat the new cover gasket with  
refrigerant oil.  
8. Install the cover plate and cover  
plate gasket.  
9. Install a new copper gasket under  
the bolt head that had one at time  
of removal. Replace all other bolts  
and tighten to 89.5 Nm.  
Condensing Pressure - Suction Pressure (bar)  
For units without discharge valve  
option  
1. Shut off the compressor and  
disconnect all electrical service to  
the compressor.  
8. Install a new copper gasket under  
the bolt head that had one at time  
of removal. Replace all other bolts  
and tighten to 89.5 Nm.  
10. Vacuum the refrigerant circuit at  
500 micron and isolate the  
vacuum pump.  
11. Confirm that no moisture or leaks  
are present by letting the vacuum  
stand for 2 hours.The pressure  
should not raise more than  
250 microns.  
9. Vacuum the refrigerant circuit at  
500 micron and isolate the  
vacuum pump.  
2. Vacuum the refrigerant out of the  
circuit.  
3. Remove the seven bolts on the oil  
filter cover. A pan may be  
necessary to catch any oil that is  
released after the cover is  
loosened.  
10. Confirm that no moisture or leaks  
are present by letting the vacuum  
stand for 2 hours.The pressure  
should not raise more than  
250 microns.  
12. Charge the unit with oil, in a  
quantity equal to what has been  
removed, by using the charging  
valve placed on the oil filter.  
4. Remove the cover and the oil filter  
element.  
11. Charge the unit with oil, in a  
quantity equal to what has been  
removed, by using the charging  
valve placed on the oil filter.  
Note: the oil is very sensitive to  
moisture. Use the oil immediately  
after the oil can has been opened.  
5. Install the new filter element.  
6. Coat the new cover gasket with  
refrigerant oil.  
13. Open all the valves before  
restarting the chiller.  
Note: the oil is very sensitive to  
moisture. Use the oil immediately  
after the oil can has been opened.  
7. Install the cover plate and cover  
plate gasket.  
26  
RLC-SVX03A-E4  
 
Maintenance  
Some symptoms of a refrigerant  
under-charged unit:  
• Low subcooling  
Checking the separator oil  
level  
Figure 17 - System Oil Specifications  
• Larger-than-normal evaporator  
approach temperatures (Leaving-  
WaterTemperature - Saturated  
EvaporatorTemperature)  
• Low Evaporator-Refrigerant  
Temperature Limit  
• Low Refrigerant-Temperature  
Cutout diagnostic  
1 Oil separator  
2Valve  
3 ¼" refrigeration hose  
4 Sight glass  
• Fully-open expansion valve  
5 Minimum oil level  
6 Maximum oil level  
• Possible whistling sound coming  
from liquid line (due to high vapor  
velocity)  
• High Condenser + Subcooler  
Pressure drop  
Some symptoms of a refrigerant  
over-charged unit:  
• High subcooling  
• Larger-than-normal condenser  
approach temperatures (Entering-  
Condenser SaturatedTemperature -  
Entering-AirTemperature)  
• Condenser Pressure Limit  
• High-Pressure Cutout diagnostic  
• More-than-normal number of fans  
running  
Follow the steps listed below and  
refer to the notes listed in Figure 17.  
1.Turn off the unit.  
4. After the level has been  
determined, remove the sight  
glass and hoses.  
• Erratic fan control  
• Higher-than-normal compressor  
power  
2. Attach the hoses and sight glass to  
the oil-separator Schrader valves,  
as shown in Figure 17. Remove  
non-condensables.  
Refrigerant and Oil-Charge  
Management  
Proper oil and refrigerant charge is  
essential for proper unit operation,  
unit performance, and  
environmental protection. Only  
trained and licensed service personal  
should service the unit.  
• Very low discharge superheat at  
startup  
• Compressor rattle or grinding  
sound at startup  
3. After the unit has been off for  
10 minutes, move the sight glass  
up and down until the level can be  
seen.  
Some symptoms of an oil over-  
charged unit:  
• Larger-than-normal evaporator  
approach temperatures (Leaving-  
WaterTemperature - Saturated  
EvaporatorTemperature)  
• Low Evaporator-Refrigerant  
Temperature Limit  
• Low Refrigerant-Temperature  
Cutout diagnostic  
• Low unit capacity  
Table 5 - Oil level limit  
• Compressor rattle or grinding  
sound  
Oil separator diameter (mm)  
152  
90  
155  
203  
120  
205  
254  
145  
235  
Minimum oil level (mm)  
Maximum oil level (mm)  
• High oil-sump level after normal  
shutdown  
RLC-SVX03A-E4  
27  
 
Maintenance  
Some symptoms of an oil under-  
charged unit:  
• Compressor rattle or grinding  
sound  
[9 mm] flare). Open the service  
valve.  
8. Remove the remainder of the  
charge with the vacuum pump.  
Recommendation: Do not pump  
the remaining charge into the high  
side.This may introduce non-  
condensable gasses and other  
contaminants into the unit.  
2. Add 4.5 kg of refrigerant (R134a)  
charge.  
• Lower-than-normal pressure drop  
through oil system  
3. Close the valve, remove the  
charging hose and start the unit.  
Monitor subcooling.  
• Seized or Welded Compressors  
9.The low side and the compressor  
may be serviced at this time.  
• Low oil-sump level after normal  
shutdown  
4. If subcooling is still insufficient,  
return to step number 2.  
Returning the unit to running  
condition:  
1. Open all the valves.  
• Lower-than-normal oil  
concentrations in the evaporator  
Note: Proper subcooling can be  
determined from run-log history,  
service experience, or by contacting  
Trane technical service.The service  
tool may include a calculation  
module that determines the proper  
subcooling for any operating  
2. Manually open EXV for 15 minutes  
to allow the refrigerant to drain to  
the evaporator by gravity.  
R134a Field-Charging  
Procedure  
Be certain that the electrical power to  
the unit is disconnected before  
performing this procedure.  
3. Let the unit sit with heaters on to  
drive refrigerant out of the oil and  
warm up the compressor  
condition (Trane Service only).  
bearings. Depending upon  
ambient conditions, this may take  
up to 24 hours.  
Charge Isolation in the high  
or low side of the system  
ƽ WARNING  
Position all electrical disconnects in  
the "Open" position and lock them to  
prevent injury or death due to  
electrocution. Follow this procedure  
when the unit is empty of all  
refrigerant and under a vacuum.  
All the refrigerant may be trapped  
into the high side (condenser) of the  
unit for maintenance on the  
4. After the oil level has returned to  
normal, the unit can be put back  
into operation.  
compressor (or low side). With the  
suction-line service valve option,  
charge may also be isolated in the  
evaporator for maintenance on the  
compressor (or high side). It is much  
more preferable to isolate the charge  
in the evaporator, if this option is  
available.  
Low-side charge-isolation procedure:  
After normal shutdown, most of the  
charge resides in the evaporator.  
Running cold water through the  
evaporator may also drive much of  
the refrigerant to the evaporator.  
1. Make sure the circuit is off.  
ƽ CAUTION  
Water must be flowing through the  
evaporator during the entire  
charging process to avoid freezing  
and rupturing of the evaporator  
tubes.  
High side charge isolation procedure:  
1. Make sure the circuit is off.  
2. Close the suction-line isolation  
valve.  
1. Find the weight of the amount of  
charge given inTable 1.  
2. Shut the liquid-line service valve.  
3. Close the oil return-line service  
valve.  
2. Attach the charging hose to the  
evaporator service valve (3/8"  
[9 mm] flare). Open the service  
valve.  
3. Shut the oil return-line service  
valve.  
4. Close the liquid line service valve.  
5. Manually open the EXV.  
4. Start the circuit with the service  
tool in charge-isolation mode:  
6. Use a liquid pump or vacuum  
pump to move refrigerant from  
the condenser to the evaporator.  
3. Add charge to the evaporator to  
bring the total circuit charge up to  
the level given inTable 1.  
• All fans will turn on  
• EXV will open 100%  
•The oil return-line solenoid will  
open  
The liquid pump will only be  
4. Close the service valve and  
disconnect the charging hose.  
effective if there is a lot of charge in  
the condenser. It may be connected  
to the condenser drain port on the  
liquid-line isolation valve.  
•The unit will start at minimum load  
Adding charge  
This procedure should be followed  
when adding charge to an  
undercharged unit. When low charge  
is indicated by low subcooling in the  
liquid line, charge should be added  
until sufficient subcooling is  
achieved.  
•The unit will run until it cuts out on  
low pressure (~6 psia) [0.41 bar].  
Note: if a pump is to be used,  
5. When the unit trips, the discharge  
check valve and the oil-line shutoff  
valve close.  
connect it before closing this valve.  
This port is only isolated when the  
valve is backseated. If a vacuum  
pump is used, then connect it to the  
discharge-line service valve near the  
oil separator. A vacuum pump will be  
required for part of the procedure.  
6. Close the discharge isolation  
valve.  
1. Attach the charging hose to the  
evaporator service valve (3/8"  
7. Close the oil-line shutoff valve.  
28  
RLC-SVX03A-E4  
 
Maintenance  
The evaporator is large enough to  
hold all the charge, for any unit,  
below the centerline of the shell.  
Therefore, no special precautions are  
required to restart the unit after  
isolating the charge in the  
12. Attach the vacuum hose and  
evacuate the liquid line.  
• Oil line drain (lowest point in  
system)  
13. Remove the vacuum hose from  
the liquid line and attach the  
charging hose.  
• Oil cooler  
• Oil temperature sensor  
• Oil line shutoff valve with flare  
service connection  
14. Replace the stored charge in the  
liquid line.  
evaporator.  
• Oil filter (internal to compressor)  
with flare-fitting service connection  
and Schrader valve  
Filter Replacement  
Procedure  
15. Remove the charging hose.  
16. Open the liquid-line isolation  
valve. On units with remote  
evaporators or oil cooler circuits,  
open the oil cooler liquid-line ball  
valve.  
A dirty filter is indicated by a  
temperature gradient across the  
filter, corresponding to a pressure  
drop. If the temperature downstream  
of the filter is 8°F [4.4°C] lower than  
the upstream temperature, the filter  
should be replaced. A temperature  
drop can also indicate that the unit is  
undercharged. Ensure proper  
subcooling before taking  
• Oil flow-control valve (internal to  
the compressor after the filter)  
• Oil return line from evaporator with  
shutoff valve, strainer, and solenoid  
control valve.The standard oil  
charge for each circuit size is shown  
inTable 1.  
Lubrication System  
The lubrication system has been  
designed to keep most of the oil  
lines filled with oil as long as there is  
a proper oil level in the oil sump.The  
total oil charge can be removed by  
draining the oil system, the oil return  
line from the evaporator, the  
evaporator, and the compressor. Very  
small quantities of oil may be found  
in other components.  
Measuring the oil level  
1.To measure the oil level, use the  
oil drain valve on the oil line and a  
service valve on the discharge line.  
This measurement can only be  
made when the circuit is not  
running. Note: the bottom plate of  
the oil separator is approximately  
1" [25 mm] thick.  
temperature readings.  
1. With the unit off, verify that the  
EXV is closed. Close the liquid-line  
isolation valve. On units with  
remote evaporators or oil cooling  
circuits, close the ball valve on the  
oil cooler liquid line.  
Oil Charging Procedure  
Proper charging of the oil system is  
critical to the reliability of the  
2. Attach the vacuum hose to the  
service port on the liquid-line filter  
flange.  
2.The initial oil charge should be  
approximately at the level as  
shown inTable 6.This is the  
approximate oil level if all the oil is  
in the oil lines, filter, and oil sump,  
and the unit is in vacuum so that  
there is no refrigerant dissolved in  
the oil.  
compressor and chiller.Too little oil  
can cause the compressor to run hot  
and inefficiently. When taken to an  
extreme, low oil level may result in  
infant failure of the compressor.Too  
much oil will result in high oil-  
circulation rates, which will foul the  
condenser and evaporator  
performance.This will result in  
inefficient operation of the chiller.  
Taken to an extreme, high oil levels  
may result in erratic expansion-valve  
control or shut down of the chiller  
due to low evaporator-refrigerant  
temperature.Too much oil may  
contribute to long-term bearing  
wear. Additionally, excessive  
3. Evacuate the refrigerant from the  
liquid-line and store.  
4. Remove the vacuum hose.  
5. Depress the Schrader valve to  
equalize pressure in the liquid line  
with atmospheric pressure.  
3. After the unit has run for a while,  
the oil level in the sump can vary  
greatly.  
6. Remove the bolts that retain the  
filter flange.  
The field-charging procedure  
depends on the circumstances that  
resulted in the need for oil charge.  
1. Some service procedures may  
result in loss of small quantities of  
oil that must be replaced (oil  
analysis, compressor filter  
7. Remove the old filter element.  
8. Inspect the replacement filter  
element and lubricate the o-ring  
withTrane OIL00048.  
ƽ CAUTION  
Do not use mineral oil. It will  
contaminate the system.  
replacement, re-tubing the  
evaporator, and so forth).  
compressor wear is probable when  
the compressor is started with the oil  
lines dry. Oil system consists of the  
following components:  
2. Additionally, some maintenance  
procedures may result in virtually  
all of the oil being removed  
(compressor motor burn or total  
removal of the charge to trouble-  
shoot a unit).  
9. Install the new filter element in the  
filter housing.  
• Compressor  
10. Inspect the flange gasket and  
replace it with a new one if  
damaged.  
• Oil separator  
• Discharge line with service valve  
11. Install the flange and torque the  
bolts to 14-16 lb-ft [19-22 n-m].  
3. Finally, leaks may result in a loss  
of oil that must be replaced.  
• Oil line from separator to  
compressor  
RLC-SVX03A-E4  
29  
 
Maintenance  
Factory (initial) Oil-Charging  
Procedure  
The initial charging procedure  
should be followed any time the unit  
is new or has had all of the oil  
removed.  
1. Add 0.95 liter (0.90 kg) of oil to the  
motor cavity or suction line prior  
to installing the compressor into  
the chiller.  
oil-charging hose to the oil-  
charging fitting and the other end  
to an oil pump. Use the pump to  
draw oil out of the oil container and  
push the required amount of oil  
into the unit. Note: the compressor  
filter has an internal shutoff valve  
that will prevent oil from entering  
the compressor while the  
compressor is not running.  
Therefore, there is no concern  
about flooding the compressor with  
oil.  
shutoff valve is closed. Other  
compressor isolation valves may  
also be closed depending upon  
the service that was completed.  
For example, changing the oil filter  
would require the compressor to be  
isolated and pulled into vacuum.  
Note: Ensure that the compressor is  
not pressurized.  
3. Open the flare fitting on the oil-line  
shutoff valve.  
2. If the unit is not equipped with  
suction-line isolation valves, it  
should contain no charge. If it has  
isolation valves, then the charge  
may be trapped in the evaporator.  
In either case, the high side of the  
system should not be pressurized.  
4. Open the flare fitting on the filter  
housing.This is the port that must  
be used to put oil into the  
compressor.  
Field Oil-Charging  
Procedure  
Use the initial charging procedure  
under the following circumstances:  
5. Install one end of the charging  
hose on the oil charging port (with  
the Schrader valve) and the other  
on the oil canister.  
3.The oil-line shutoff valve must be  
open to allow the oil to pass into  
the oil lines and the oil separator.  
• When virtually all of the oil has  
been removed.  
6. Lift the oil canister, or use a pump,  
to pour oil into the filter housing.  
4.The oil charging port is a ¼"  
[6 mm] flare fitting with a Schrader  
valve that is on the side of the oil-  
filter housing.This is the port that  
must be used to add oil into the  
compressor so that the filter and  
lines are full at the first start of the  
compressor.  
• If the oil charge is removed from  
the compressor and oil system  
only, but the unit has been run for  
less than 15 minutes.  
7. When oil comes out of the flare  
fitting on the oil-line shutoff valve,  
the filter is full. Stop adding oil.  
• If the oil charge is removed from  
the compressor and oil system  
only, and the unit has been run for  
more than 15 minutes.  
8. Put the cap on the flare on the oil-  
line shutoff valve, remove the  
charging hose, and put the cap  
back on the flare on the filter  
housing.  
5. On single-compressor circuits, all  
the oil should be put into the  
circuit through the oil-charging  
port on the compressor filter  
housing. On two-compressor  
circuits, put approximately ½ of  
the oil into the unit through each  
of the two oil-charging ports on  
the two compressors.  
However, reduce the amount of oil  
added to the unit by the normal  
quantity of oil in the refrigeration  
system.  
9. Vacuum the compressor (low side)  
and prepare it for inclusion in the  
system.There is a service valve on  
the suction line and on the  
evaporator. Use these valves to  
vacuum the compressor.  
Note: this procedure can be followed  
even with the refrigerant charge  
isolated in the evaporating section of  
the unit.  
10. Open the oil-line shutoff valve.  
Severe damage to the  
If small quantities of oil were  
removed to service refrigeration  
components, such as the evaporator,  
replace the oil that was removed  
back into the serviced component  
prior to vacuum and recharge of the  
refrigerant.  
6. Oil may be put into the unit using  
either of two methods:  
compressor can result if the oil-  
line shutoff valve is closed when  
the compressor is started.  
ƽ CAUTION  
Use onlyTrane OIL 00048 in the units  
to avoid any catastrophic damage to  
the compressor or unit.  
ƽ CAUTION  
Catastrophic damage to the  
compressor will occur if the oil-line  
shutoff valve or the isolation valves  
are left closed on unit startup.  
If oil was removed to service a  
compressor or change the filter  
follow this procedure:  
• Have the unit in vacuum. Note that  
the vacuum connection should be  
made on the unit at the service  
valve that is on the discharge line.  
Hook up one end of the oil-charging  
hose to the oil-charging fitting and  
immerse the other end into the oil  
container. Let the vacuum draw the  
required amount of oil into the unit.  
1. If the compressor is a new  
11. Open the other compressor  
isolation valves.  
compressor or has been removed  
from the system and reworked,  
add 0.95 liter (0.90 kg) of oil to the  
motor cavity prior to installing the  
compressor into the chiller.  
Note: this procedure assumes that  
the oil that is put into the filter  
housing does not have contaminants  
such as non- condensable gases.The  
oil forces these gases out of the filter  
2. Install the compressor in the  
system. Make sure that the filter  
• Have the unit at the same pressure  
as the oil. Hook up one end of the  
30  
RLC-SVX03A-E4  
 
Maintenance  
and oil- line shutoff valve, without  
the need to pull a vacuum on this  
small volume. If the oil has been in  
an open container or is otherwise  
contaminated, then this small  
volume must be subject to vacuum  
as well. However, the filter cavity is  
full of oil.Therefore, be sure to use a  
flash tank in line with the vacuum  
pump to ensure that the oil that is  
pulled out of the filter cavity does  
not slug the vacuum pump.  
RLC-SVX03A-E4  
31  
 
Safety recommendations  
Maintenance contract  
Training  
To avoid accidents and damage, the  
following recommendations should  
be observed during maintenance  
and service visits.  
It is strongly recommended that you  
sign a maintenance contract with  
your local Service Agency.This  
contract provides regular  
The equipment described in this  
manual is the result of many years of  
research and continuous  
development.To assist you in  
maintenance of your installation by a  
specialist in our equipment. Regular  
maintenance ensures that any  
malfunction is detected and  
obtaining the best use of it, and  
maintaining it in perfect operating  
condition over a long period of time,  
the constructor has at your disposal  
a refrigeration and air conditioning  
service school.The principal aim of  
this is to give operators and  
maintenance 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  
1.The maximum allowable pressures  
for system leak testing on low and  
high pressure side are given in the  
chapter "Installation". Always  
corrected in good time and  
provide a pressure regulator.  
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.  
2. Disconnect the main 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.  
parameters as well as on preventive  
maintenance, which reduces the cost  
of owning the unit by avoiding  
serious and costly breakdown.  
Literature Order Number  
Date  
RLC-SVX03A-E4  
0202  
Supersedes  
B20IM004-E 0400  
Europe  
Stocking Location  
Trane has a policy of continuous product and product data improvement and reserves the right to  
change design and specifications without notice. Only qualified technicians should perform the  
installation and servicing of equipment referred to in this publication.  
TheTrane Company  
An American Standard Company  
www.trane.com  
For more information contact  
your local sales office or  
e-mail us at [email protected]  
SociétéTrane – Société Anonyme au capital de 61 005 000 Euros – Siège Social: 1 rue des Amériques –  
88190 Golbey – France – Siret 306 050 188-00011 – RSC Epinal B 306 050 188  
Numéro d’identification taxe intracommunautaire: FR 83 3060501888  
 

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