Specifications

INSTALLATION
STEP 1 -
COMPLETE PRE-INSTALLATION CHECKS
Examine for damage incurred during shipment.
File a claim immediately with transit company if
damage is found.Verify that the nameplate electrical
requirements match the available power supply.
Check the shipment for completeness.
STEP 2 - LOCATION
All unit coolers should be installed flush against the
ceiling. The unit cooler must be level in all directions
to ensure proper drainage of condensate. Be sure
there is sufficient clearance between the ceiling and
unit cooler to allow for cleaning the unit cooler top.
When deciding on the location of the unit cooler,
consider the following:
• Location of aisle racks
• Location relative to compressor for minimum
pipe runs
• Location of condensate drains for minimum run
• The air pattern must cover the entire room
• Never locate unit coolers over doors or door
openings
• Allow sufficient space between rear of unit cooler
and wall to permit free return of air
SAFETY CONSIDERATIONS
Installing, starting up, and servicing equipment can
be hazardous due to system pressures, electrical
components and equipment location (roofs, elevated
structures, etc.). Only trained, qualified installers and
service mechanics should install, start up, and service
this equipment.
When working on the equipment, observe precautions
in the literature and on the tags, stickers, and labels
attached to the equipment.
Follow all safety codes.Wear safety glasses and work
gloves. Keep quenching cloths and fire extinguisher
nearby when brazing. Use care in handling, rigging,
and setting bulky equipment.
INTRODUCTION
These instructions describe installation, start-up,
and service for the RefPlus refrigeration unit coolers.
INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
3
WARNING
Before installation, always check to be sure main
power to systems is OFF. Electrical shock can
cause personal injury or death.
NOTE
Avoid placement of the unit cooler directly above
doors and door openings where low temperature
is being maintained. Position the unit cooler so
the discharge air blows above the doors. Install
a baffle if door extends above the blower level.
NOTE
Unit coolers with electric defrost require a 20 in.
clearance at the left end when facing the fans
to allow removal of defrost heaters.
NOTICE
The unit cooler must be mounted level for proper
condensate draining. Adequate support must be
provided to hold the weight of the unit cooler.
Note: The area above the unit must be sealed and
accessible to facilitate hand cleaning without the
use of tools in order to comply with National
Sanitation Foundation (NSF) Standard 7.
S
TEP 3 - MOUNTING
Most unit coolers can be mounted with either bolts
or rod hangers. Use 5/16 in. bolts and washers for
unit coolers weighing up to 250 pounds. Use 3/8 in.
bolts and washers for unit coolers weighing from
250 to 500 pounds. For unit coolers over 500
pounds, use 5/8 in. bolts and washers.
STEP 4 - CONNECT DRAIN LINE
For all unit coolers, a drain line union is recommend-
ed for ease of installation and future servicing and
should be located in close proximity to the drain pan.
LS, LP & LA UNIT COOLERS – A 7/8 in. ID removable
drain fitting is supplied with each unit. Follow steps
1 through 4 above for connecting the drain line.
FOR ALL UNIT COOLERS, connect the drain line as
follows:
1. Replace the rubber gasket to prevent
condensate leakage.
2. Locate the union as close to the drain pan
as possible.
3. Using two wrenches, tighten the drain fitting.
The use of two wrenches prevents the drain
fitting from twisting and damaging the unit
cooler.
4. Sharply pitch the drain line and exit it through
the cooler with a short run.
5. Insulate and seal the drain line where it
passes through the wall.
6. Locate the drain traps in warm ambient air
temperature to prevent freeze up.
NOTE
If the cooler temperature is below 32ºF,
a field supplied drain line heater (15 W per foot)
may be required.When installing the heater,
be sure to avoid overlapping.
LS UNIT COOLERS – These unit coolers should be
located in a position where the air discharge is
toward the door. The coil face on the unit cooler
should be least 7 in. away from the wall.
LP & LA UNIT COOLERS – These unit coolers should
be located in the center of the cooler with air
discharge toward the back or side wall.