Components And Controls; Hard-Start Components - Fujitsu FO14R Series Installation Instructions Manual

COMPONENTS & CONTROLS
Compressor Crankcase Heat (CCH)
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.

Hard-Start Components

Start components are not usually required with
the scroll compressors used in heat pumps,
but are available for special cases and where
30
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.)
start components are desirable to reduce light
dimming. Hard start components are available
through Prostock.