12
In either mode, if any condition causes a compressor stoppage
to occur 5 times during a single
Y1
input, the system will lock
out and not operate for 1 hour to allow well recovery. See
Creating a short across the terminal marked “TEST” will cause
the system to ignore the anti-short cycle timer described above.
All other functionality is the same.
unIt MaIntEnancE
WarnInG:
ElEctrIcal shocK, FIrE or
EXPlosIon hazarD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical power
to the unit.
• When servicing controls, label all wires prior to
disconnecting. reconnect wires correctly.
• Verify proper operation after servicing.
Proper maintenance is important to achieve optimum
performance. The ability to properly perform maintenance on
this equipment requires certain mechanical skills and tools.
If you do not possess these skills, contact your dealer for
maintenance. Consult your local dealer about the availability
of maintenance contracts.
Routine maintenance should include the following:
• Visually inspect the unit at the beginning of each heating
and cooling season. Remove any debris.
• Inspect the electrical connections for tightness at the
beginning of each heating and cooling season. Service as
necessary.
• Check pressure drop across the oil separator.
• Check temperature drop across the filter/drier.
cautIon:
the unit should never be operated without a filter
in the return air system. replace disposable filters
with the same type and size.
• Inspect and clean or replace air filters at the beginning of
each heating and cooling season, or more frequently if
required.
IMPortant notE:
Do not leave the filter/drier exposed to the exterior air.
Install as soon as seals are removed. Failure to comply
will impair the filter’s capacity.
Filter / Drier
If the temperature drop across the filter/drier exceeds 3° F,
it must be replaced.
replacing the oil separator Filter
The oil separator has an internal filter which is installed at the
factory. The second filter is to be used as a replacement within
24 to 48 hours of operation. These coalescent filters will pick
up all dirt and particulates down to 0.3 microns. Typical filter/
driers only catch 50 microns or larger.
Frequently check the pressure drop across the separator on
and
.
• Change the filter after an initial 24 to 48 hours of operation
or if the pressure drop across the separator exceeds 5
psig.
• In the event of a compressor burn-out, use a clean-up
filter and monitor the pressure drop. Install a standard filter
when the pressure drop across the separator exceeds
5 psig.
After installing the new oil separator filter, replace the gasket
on the top flange of the oil separator. Tighten the bolts to a
torque of 20-22 ft-lbs. Close the lowest isolation valve at the
front of the cabinet (the isolation valve between the check valve
and the bottom of the reversing valve). Use the Schrader port
on this isolation valve to evacuate the oil separator. Open all
closed isolation valves after evacuation.
adding compressor oil
Oil must be added whenever any of the system’s oil separator
or accumulators are replaced. If the oil separator is replaced,
add 20 ounces of POE oil to the new oil separator prior to
installation. If an accumulator is replaced, add 10 ounces of
POE oil to the new accumulator prior to installation. If two
accumulators are replaced, 10 ounces of oil must be added
to each new accumulator.
IMPortant notE:
after adding additional oil to a replaced oil separator,
wait one full hour before starting the system if oil was
accidently added through the top intake refrigerant line
to the oil separator. otherwise, the filter within the oil
separator may incur excessive pressure and become
damaged and/or ineffective.
There are 2 ways to add additional oil:
• Slowly add oil through the schrader valve on the suction
line to either the accumulator or compressor during system
operation, via the use of a pressure gauge set.
• Using an oil pump, pump oil into a schrader valve in the suction
side of the system’s accumulator. A simple hand operated
oil pump is fully adequate and easy to use. ALWAYS be
careful to place the supply can of POE oil onto a refrigerant
scale so that you can assure the correct amount of oil is
added.
