General Information
8 COM-SVN003B-EN
Additional basic limitations on operating
conditions:
• Discharge temperature must not exceed 300°F
(Measure within 6 inches from discharge port).
• Low superheat is not recommended due to risk of oil
dilution of the compressor. Recommended minimums
are as follows:
– Electronic expansion valve 10°F.
– Thermal expansion valve 18-20°F.
• Minimum oil sump superheat 20°F.
• Maximum suction gas superheat 54°F.
• Minimum of 30 psid differential between suction and
discharge must be maintained.
• Voltage must be within the compression utilization
voltage range.
• Minimum and maximum saturated evaporating and
condensing temperatures are as shown in the
operating map.
• Excess liquid refrigerant in the compressor at start up
can cause Oldham coupling failure, involute breakage
and damaged bearings.
• When the refrigerant system charge exceeds 3 pounds
per ton, crankcase heaters are required.
• If required, heaters must be energized for a minimum
of eight hours prior to starting the compressor to
insure that liquid refrigerant is not in the compressor at
start up.
• Under normal operation compressor shall operate for
3 minutes minimum.
• Max Amps should not exceed listing on compressor
nameplate.
Refrigerant Type
CSHW compressors are approved for use with R-410A
refrigerant only. Any use of hydrocarbon refrigerants or air
is strictly prohibited!
Transportation, Handling, and
Storage
The compressor must be handled in the vertical position
(maximum 15° offset from vertical). Should the
compressor be handled in an upside down position, its
suitability for its use can not be guaranteed.
Figure 1. R-410A operating map for CSHW at 20°F suction superheat
60
80
100
120
140
160
-20-100 1020304050607080
Saturated Discharge Temperature (°F)
Saturated Suction Temperature (°F)
CSHW Operating Envelope --- R-410A
Full Load Operating Map
Unloaded Map; Reduced Operating Map
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