Carrier C708, Service Manual

Page: 55 / 148

49
Models C708/C709/C716/C717
Systems, Controls and Operations
COMP LABEL DESCRIPTION FUNCTION BASIC OPERATING LOGIC INPUT /
OUTPUT
Mix Hopper 20 quart capacity,
conventional copper wrap Storage of product mix,
evaporator.
Freezing
Cylinder 3.4 quart capacity,
conventional copper wrap Freezing of product,
evaporator.
Condenser Lanced fin Cooling of compressed
refrigerant.
Fan -
Condenser Compact fan Provides air flow to remove
heat from condenser heat
exchanger. On with the compresser in
Auto, Standby, and the
cooling phase of the Heat
mode. Operates for 30
seconds after the
compressor shuts off. Output
Compressor Hermetically sealed Compresses the refrigerant.
Used for barrel and hopper
cooling in Auto, Standby, and
the cooling phase of the heat
mode. Enabled in Auto, Standby,
and the Heat modes, Off in
Wash and Off modes. Output
TXV Thermostatically controlled
expansion valve in the
hopper circuit. Controls the refrigerant flow
during cooling of the hopper.
AXV Automatic expansion valve of
the freezing cylinder circuit Controls the refrigerant flow
during the cooling of the
freezing cylinder.
SV01 Barrel liquid solenoid valve Controls the flow of
refrigerant to the AXV. Enabled in the Auto,
Standby, and the cooling
phase of the heat mode.
Off in the Wash, Off, and
heating phase of the Heat
modes. Output
SV02 Hopper liquid solenoid valve Controls the flow of
refrigerant to the TXV01. Enabled in the Auto,
Standby, and the cooling
phase of the heat mode.
Off in the Wash, Off, and
heating phase of the Heat
modes. Output
SV03 Barrel hot gas solenoid valve Controls the flow of hot gas
refrigerant to the barrel. Enabled in the heat phase of
the Heat mode. Off in the
Auto, Standby, and the
cooling phase of the heat
mode. Output
SV04 Hopper hot gas solenoid
valve Controls the flow of hot gas
refrigerant to the hopper. Enabled in the heat phase of
the Heat mode. Off in the
Auto, Standby, and the
cooling phase of the heat
mode. Output
SV05 Barrel suction solenoid valve Controls the flow of
refrigerant at the low
pressure side of the barrel. Is enabled anytime the barrel
is being heated or cooled. Its
purpose is to prevent
refrigerant flow when the
hopper only is being
refrigerated to prevent barrel
freeze up.
SV06 Discharge bypass line
solenoid valve Prevents leakage of
refrigerant past the DBV. Opens any time the hopper is
being cooled.