Service Manual

ELEVATION SERIES CIM CUBER REFRIGERATION SECTION
53
REFRIGERATION SECTION
The Refrigeration Section on a CIM Cuber con-
tains the Compressor, Thermostatic Expan-
sion Valve, Hot Gas Valve and Condenser.
Remote systems also utilize a Mixing Valve
(LAC), Liquid Line Solenoid and Receiver.
Refrigeration Section Operation
The Compressor drives the refrigeration system. Ice-O-Matic uses a Thermostatic Expansion
Valve to control refrigerant flow through the Evaporator.
Troubleshooting - System
When troubleshooting the refrigeration system, always use stub gauges to limit the amount of
refrigerant lost during connecting and disconnecting.
Always verify the refrigeration systems operating pressures when diagnosing any refrigeration
component. The Compressor should pull within 10% of the RLA when measured 5 minutes into
the Freeze Cycle and greater than 70% of RLA during the Freeze Cycle to be considered efficient.
Thermostatic Expansion Valve
The Thermostatic Expansion Valve meters refrigerant through the Evaporator.
Troubleshooting - Expansion Valve
First verify proper system pressures and charge. Verify the TXV bulb is securely mounted at 7
degrees off vertical and well insulated. Generally a low suction pressure with a normal head
pressure will show as poor ice formation top to bottom on the Evaporator and indicate a low
side restriction such as at the TXV. Should suction run high or not drop, verify bulb connection to
suction line and look for sweating or frosting on the dome of the Compressor indicating TXV is
stuck open.