Nor-Lake Refrigeration Systems - Manual (Page 3)

09/14 Rev. E 101628 3
UNIT COOLERS

UL LISTED

Forced air type with low profile design

Designed for ceiling installation with air discharge parallel to the walk-in ceiling

Fan motors, guards, and multi fin or tube type direct expansion coil are enclosed in a heavy
gauge aluminum housing

Include drain pan with suitable drain pipe connection

Freezer models have an automatic electric defrost system including heaters, time clock, defrost
termination and fan delay control, heated drain pan, and heater limit switch

Defrosts are time initiated and temperature terminated with a built in fail safe control
REFRIGERANT

R404A for high/medium temperature applications.

NOTE
: R404A system’s compressors use POE oils. DO NOT leave the compressor service
valves open for over five minutes, as this will contaminate the oil with moisture and void the
warranty.
ELECTRICAL

No inter-wiring required between the evaporator and condensing unit

Two point electrical connection, one at the condensing unit and one at the unit cooler, provided
for field hook up

Rack mounted control box that encloses factory pre-wired pressure controls and contactor for
three phase units

NOTE: Nor-Lake wiring diagram is provided. Keep for reference. DO NOT use any other
diagram
PROVIDED EQUIPMENT FOR FIELD INSTALLATION

Liquid line filter drier

Sight glass

Solenoid valve

Room temperature control

Expansion valve

Evaporator mounting kit

Defrost time clock
FIELD INSTALLATION REQUIREMENTS

Refrigerant piping

Evaporator drain line

Freezer drain line heater
OPTIONAL FEATURES

Pre-charged systems, up to 3 horsepower, with line sets up to 50 feet long using reusable quick
connect refrigerant line fittings

Pre-piped with the liquid line filter drier, sight glass, and hand valve factory installed (not
applicable to pre-charged systems)

Pre-wired to allow for a single point electrical connection at the condensing unit (will require field
inter-wiring between the evaporator and condensing unit)
NOTE: Nor-
Lake will custom design and build refrigeration systems to meet the customer’s needs .