34
While scroll compressors usually do not require
crankcase heaters, there are instances when a
heater should be added� Refrigerant migration
during the off cycle can result in a noisy start up�
Add a crankcase heater to minimize refrigeration
migration, and to help eliminate any start up noise
or bearing “wash out�”
NOTE: The installation of a crankcase heater is
recommended if the system charge exceeds the
values in the table below� The 5 ton model comes
with a crankcase heater factory installed�
ll heaters are located on the lower half of the
compressor shell� Its purpose is to drive refrigerant
from the compressor shell during long cycles,
thus preventing damage to the oompressor during
start-up�
At initial start-up or after extended shutdown
periods, make sure the heater is energized for at
least 12 hours before the compressor is started�
(Disconnect switch on and wall thermostat off�)
Compressor Crankcase Heat (CCH)
High- and Low-Pressure Controls (HPC and LPC)
Standard on RP14: These controls keep the
compressor from operating in pressure ranges
which can cause damage to the compressor� Both
controls are in the low-voltage control circuit�
The high-pressure control (HPC) is an automatic-
reset which opens near 610 PSIG and closes near
420 PSIG�
The low-pressure control (LPC) is an automatic-
reset which opens near 15 PSIG and closes near
40 PSIG�
CAUTION: The compressor has
an internal overload protector� Under some
conditions, it can take up to 2 hours for this
overload to reset� Make sure overload has had
time to reset before condemning the compressor�
Start components are not usually required with
the scroll compressors used in heat pumps,
but are available for special cases and where
start components are desirable to reduce light
dimming� Hard start components are available
through Prostock�
Hard-Start Components
COMPONENTS AND CONTROLS
MAXIMUM SYSTEM CHARGE VALUES
Charge Limit
Model Compressor Without
Size*Model Number Crankcase Heater*
RP1336AC
RP1342AC
RP1348AC
RP1360AC
RP1336AD
RP1342AD
RP1348AD
RP1360AD
ZP31K5E-TF5-13R 9.6 lbs.
ZP36K5E-TF5-13R 9.6 lbs.
ZP42K5E-TF5-13R 12 lbs.
ZP49K6E-TF5-130
ZP31K5E-TFD-13R
ZP36K5E-TFD-13R
ZP42K5E-TFD-13R
ZP49K6E-TFD-130
12 lbs.
9.6 lbs.
9.6 lbs.
12 lbs.
12 lbs.
Components
MAXIMUM SYSTEM CHARGE VALUES
Charge Limit
Model Compressor Without
Size*Model Number Crankcase Heater*
RP1518AJ
RP1524AJ
RP1530AJ
RP1536AJ
RP1542AJ
RP1548AJ
RP1560AJ
RP1536AC
RP1542AC
RP1548AC
RP1560AC
ZP16K5E-PFV-13R 9.6 lbs.
ZP21K5E-PFV-13R 9.6 lbs.
ZP25K5E-PFV-13R 9.6 lbs.
ZP31K6E-PFV-130
ZP36K5E-PFV-13R
9.6 lbs.
ZP40K6E-PFV-130 12 lbs.
ZP49K6E-PFV-130
ZP31K6E-TF5-130
ZP36K5E-TF5-13R
ZP40K6E-TF5-130
ZP49K63-TF5-130
12 lbs.
9.6 lbs.
9.6 lbs.
12 lbs.
12 lbs.
9.6 lbs.
MAXIMUM SYSTEM CHARGE VALUES
Charge Limit
Model Compressor Without
Size*Model Number Crankcase Heater*
RP1418AJ
RP1424AJ
RP1430AJ
RP1436AJ
RP1442AJ
RP1448AJ
RP1460AJ
RP1436AC
RP1442AC
RP1448AC
RP1460AC
RP1436AD
RP1442AD
RP1448AD
RP1460AD
ZP16K5E-PFV-13R
9.6 lbs.
ZP21K6E-PFV-130
9.6 lbs.
ZP25K5E-PFV-13R
9.6 lbs.
ZP31K5E-PFV-13R
ZP36K5E-PFV-13R
9.6 lbs.
ZP42K5E-PFV-13R
12 lbs.
ZP49K6E-PFV-130
ZP31K5E-TF5-13R
ZP36K5E-TF5-13R
ZP42K5E-TF5-13R
ZP49K6E-TF5-130
ZP31K5E-TFD-13R
ZP36K53-TFD-13R
ZP42K5E-TFD-13R
ZP49K6E-TFD-130
12 lbs.
9.6 lbs.
9.6 lbs.
9.6 lbs.
12 lbs.
12 lbs.
9.6 lbs.
9.6 lbs.
12 lbs.
12 lbs.
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