176
RT-SVX073A-EN
service representative.
Note: The actual belt deflection force must not exceed
the maximum value shown in Table 75, p. 176.
7. Recheck the new belt's tension at least twice during the
first 2 to 3 days of operation. Readjust the belt tension
as necessary to correct for any stretching that may
have occurred. Until the new belts are “run in”, the belt
tension will decrease rapidly as they stretch.
Table 75. 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 7.4
5.0-7.0 1000-2500 5.4 8 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
– –
10.2 15.2
1750-3000 8.8 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
Scroll Compressor Replacement
The compressor manifold system was purposely designed
to provide proper oil return to each compressor. The
refrigerant manifold system must not be modified in any
way. See Figure 115, p. 176.
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.
Important: 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).
Figure 115. Suction line filter/drier installation
Sight glass
Suction service
va
lve
Replaceable core
drier
1
Service and Maintenance
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