INSTALLATION INSTRUCTIONS
AFTER START UP
1. Check the oil level to be sure the oil charge is correct.
2. On the initial start up, the fans do not start until coil
temperature is pulled down to approximately 26 °F
(-3 °C)
Also, it is normal for the fans to cycle a few times
until the room temperature is pulled down.
3. After the room is pulled down make sure that the
expansion valve is properly set so that the coil frosts
evenly all the way through.
4. Heavy moisture loads are usually encountered when
starting the system for the first time. This will cause a
rapid build-up of frost on the unit cooler. During the
initial pull down, we suggest that the frost build-up be
watched and defrosted manually as required.
MAINTENANCE
1. Periodic checking and cleaning of the coil surface
when necessary should be done, using a whisk or
brush. Drain pans are hinged to provide convenient
access to the inside coil surface.
2. Motors are permanently lubricated type and require
no further lubrication.
REFRIGERATION SYSTEM
Refrigerant line sizes are important and should be the
same size as the coil connections, or larger, depending
on the length of run. Consult recommended refrigerant
line sizes charts (KeepRite Refrigeration Engineering
Manual or other recognized sources of information) when
sizing refrigerant lines.
Refrigerant piping and control systems should be
designed to prevent possible liquid slugging of the
compressors on start-up after the defrost cycle.
Select an externally equalized expansion valve best
suited to the coil and the application on the basis of the
manufacturer’s ratings. Install the expansion valve in the
refrigeration piping compartment.
A 1/4” (6mm) O.D. equalizer line has been provided for
the externally equalized expansion valve connection.
A Schrader valve fitting is supplied at the suction gas
header to provide convenient pressure readings.
The refrigerant distributor is sized and installed at the
factory and is supplied with a factory sized nozzle.
A hinged end panel provides quick access to the
refrigeration piping compartment.
SYSTEM CHECK
1. All wiring should be in accordance with local codes.
2. All refrigerant lines should be properly sized and
checked for any possible leaks.
3. Be sure system is charged with the proper refrigerant.
4. Make sure that the expansion valve thermal bulb is
securely strapped to the suction line.
5. The system should include a liquid line drier and
strainer.
6. The suction, discharge and receiver service valves
must be open.
7. Check that the fans turn freely and turn in clock wise
rotation.
8. Pour enough water into the drain pan to allow a good
check on drainage and seal the trap.
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