Service and Maintenance
RT-SVX24J-EN 181
Scroll Compressor Replacement
The compressor manifold system was purposely designed
to provide proper oil return to each compressors. The
refrigerant manifold system must not be modified in any
way.
Note: Altering the compressor manifold piping may
cause oil return problems and compressor failure.
Should a compressor replacement become necessary and
a suction line filter drier is to be installed, install it a
minimum of 18 inches upstream of the oil separator tee.
See Figure 123, p. 181.
Anytime a compressor is replaced, the oil for each
compressor within the manifolded set must be replaced.
The scroll compressor uses Trane OIL00079 (one quart
container) or OIL00080 (one gallon container) without
substitution.The appropriate oil charge for CSHN250 and
CSHN315 scroll compressors is 14.2 pints. For CSHN374
scroll compressor, use 15.2 pints.
The recommended method for evacuation and
dehydration is to evacuate both the high side and the low
side to 500 microns or less.To establish that the unit is
leak-free, use a standing vacuum test.The maximum
allowable rise over a 15 minute period is 20 0 microns. If
the rise exceeds this, there is either still moisture in the
system or a leak is present.
Note: Do Not release refrigerant to the atmosphere! If
adding or removing refrigerant is required, the
service technician must comply with all Federal,
State and local laws.
Table 59. Belt Tension Measurement and Deflection Ranges
Belt
Cross
Section
Smallest
Sheave
Diameter
Range (In.) RPM Range
Belt Deflection Force (Lbs.)
Super Gripbelts and
Unnotched Gripbands
Gripnotch Belts and
Notched Gripbands
Min. Max. Min. Max.
A, AX
3.0-3.6 1000-2500 3.7 5.5 4.1 6.1
3.8-4.8 1000-2500 4.5 6.8 5.0 7.4
5.0-7.0 1000-2500 5.4 8.0 5.7 8.4
B, BX
3.4 – 4.2 860-2500 -- -- 4.9 7.2
4.4 – 5.6 860-2500 5.3 7.9 7.1 10.5
5.8 – 8.6 860-2500 6.3 9.4 8.5 12.6
3V, 3VX
2.2 - 2.4 1000-2500 -- -- 3.3 4.9
2.65 - 3.65 1000-2500 3.6 5.1 4.2 6.2
4.12 - 6.90 1000-2500 4.9 7.3 5.3 7.9
5V, 5VX
4.4 – 6.7
500-1749
1750-3000
-- --
10.2
8.8
15.2
13.2
7.1 –10.9 500-1740 12.7 18.9 14.8 22.1
11.8-16.0 500-1740 15.5 23.4 17.1 25.5
Figure 123.Suction Line Filter/Drier Installation
Sight glass
Suction service
valve
Replaceable core
drier
Note: These components are also located at circuit #1 side
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