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Remote Refrigeration Instruction
The condensing unit and pressure control are optionally supplied from the factory for remote location
installation. A remote high low pressure switch must be mounted and wired by the installer. The high low
pressure switch must be wired in series with the compressor power supply as shown in diagram below.
1.
Mount condensing unit indoors as close to the remote display case as practical. The refrigeration line
should be as short as possible and must not exceed 30 feet.
2.
All refrigeration and/or electrical materials between the condensing unit and display case are to be
supplied by installing contractor.
3.
Route properly sized and designed refrigeration lines from the condensing unit to the cabinet.
Horizontal suction lines should be pitched downward towards the condensing unit at least ½” per 10’
run to aid the oil drainage. A “P” trap must be installed in the suction line at the foot of every riser to
insure oil return. Dry nitrogen must be used to flow through tubing while brazing refrigeration lines.
4.
Suction line must be insulated the entire length with Armaflex (or equivalent). Do not run liquid line
inside insulation with suction line.
5.
The remote high/low-pressure control must be mounted, wired and set pressures by the installer.
6.
Leak check condensing unit, cabinet, and all connecting tubing. Cabinet and condensing unit tubing
should be checked to insure no leaks occurred during shipping or from rough handling.
Make certain all refrigeration valves are opened and evacuate system to 500 microns. Charge the
system with refrigerant type specified on the data plates.
REMOTE
HIGH LOW
PRESSURE
CONTROL
LIQUID LINE
SUCTION LINE (INSULATED)
REMOTE
CONDENSING
UNIT
EVAPORATOR
COILS
DISPLAY CASE
EXPANSION
VALVE
HIGH
LOW
LIQUID LINE
SOLENOID VALVE
SIGHT GLASS
DRIER/FILTER
FIELD CONNECTION
HOT
FUSED
POWER
SUPPLY
DEFROST
TERMINATE
PROBE
ELECTRONIC
CONTROL
AIR TEMP. CONTROL PROBE
FUSED
CASE
POWER
