Maintenance
172 RT-SVX36K-EN
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 16 or 25 inches upstream of the oil separator
tee. See Figure 136, p. 175.
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. Refer to general service
bulletin MSCU-SB-1 (latest edition).
Refrigeration System
Refrigerant Evacuation and Charging
The unit is fully charged with R-410A refrigerant from the
factory. However if it becomes necessary to remove or
recharge the system with refrigerant, it is important that
the following actions are taken. Failure to do so may cause
permanent damage to the compressor.
Charge Storage
Due to the reduced capacity of the microchannel
condenser coil compared to the round tube plate fin
evaporator coil, pumping refrigerant into the condenser
coil to service the refrigerant system is no longer an
option.
Table 74. Belt tension measurement and deflection
ranges
Belts
Cross
Section
Small
P.D.
Range
Deflection Force (lbs.)
Steel Cable
GripbeltsSuper Gripbelts Gripnotch
Min. Max. Min Max. Min Max
A
3.0 - 3.6 3 4 1/2 3 7/8 5 1/2 3 1/4 4
3.8 - 4.8 3 1/2 5 4 1/2 6 1/4 3 3/4 4 3/4
5.0 - 7.0 4 5 1/2 5 6 7/8 4 1/4 5 1/4
B
3.4 - 4.2 4 5 1/2 5 3/4 8 4 1/2 5 1/2
4.4 - 5.6 5 1/8 7 1/8 6 1/2 9 1/8 5 3/4 7 1/4
5.8 - 8.8 6 3/8 8 3/4 7 3/8 10 1/8 7 8 3/4
Belts
Cross
Section
Small
P.D.
Range
Deflection Force (lbs.)
358 Gripbelts 358 Gripnotch
Min. Max. Min Max.
5V
4.4 - 8.7 — — 10 15
7.1 - 10.9 10 1/2 15 3/4 12 7/8 18 3/4
11.8 -
16.0
13 19 1/2 15 22
Figure 130. Belt deflection
WARNING
NO STEP SURFACE!
Do not walk on the discharge grate. Walking on the
grate could cause the supporting metal to collapse,
resulting in the operator/technician to fall. Failure to
follow this recommendation could result in death or
serious injury.
WARNING
R-410A Refrigerant under Higher Pressure
than R-22!
The units described in this manual use R-410A
refrigerant which operates at higher pressures than R-
22 refrigerant. Use ONLY R-410A rated service
equipment or components with these units. For
specific handling concerns with R-410A, please contact
your local Trane representative.
Failure to use R-410A rated service equipment or
components could result in equipment exploding under
R-410A high pressures which could result in death,
serious injury, or equipment damage.
WARNING
Refrigerant under High Pressure!
System contains oil and refrigerant under high
pressure. Recover refrigerant to relieve pressure before
opening the system. See unit nameplate for refrigerant
type. Do not use non-approved refrigerants, refrigerant
substitutes, or refrigerant additives. Failure to recover
refrigerant to relieve pressure or the use of non-
approved refrigerants, refrigerant substitutes, or
refrigerant additives could result in an explosion which
could result in death or serious injury or equipment
damage.
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