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Refrigeration Installation
(Refrigerated units)
Self Contained Models
The self-contained models are shipped from the factory with a completely operational 134A refrigeration
system and require no modifications or adjustments upon installation.
Remote Models
The remote models are designed to use 134A refrigerant and shipped from the factory with the evaporator
coil, expansion valve, refrigerant solenoid valve and thermostat. The thermostat senses interior case
temperatures and opens and closes the refrigerant solenoid valve as needed to maintain proper case
temperatures. The condensing unit is optionally supplied from the factory for remote location installation.
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 should 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 filter drier, sightglass, and low-pressure control are not furnished with remote display case models.
The recommended low pressure setting for R134a refrigerant is 32# cut in and 0# cutout.
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.
INSTALL
LOW PRESSURE
CUTOUT
LIQUID LINE
SUCTION LINE (INSULATED)
REMOTE
CONDENSING
UNIT
EVAPORATOR COIL
REMOTE DISPLAY CASE
EXPANSION
VALVE
LIQUID LINE
SOLENOID
VALVE
THERMOSTAT
INSTALL
FILTER DRIER