The “weep” holes are not condensate drains, and need
not be trapped. They may be plugged or left open for
automatic drainage.
SERVICE CONTINUED
PROCEDURE FOR COMPRESSOR REPLACEMENT
Isolate the compressor and remove the refrigerant from
system.
Remove the inoperative compressor.
Install a properly sized suction line filter-drier in the
compressor suction line and replace liquid line drier.
Examine expansion valves and solenoid valves to see if
cleaning or replacement is required.
Install the replacement compressor.
Evacuate the compressor and system to 500 microns.
Open the compressor service valves and charge the
system with R410A after compressor evacuation.
Operate the system. Check the pressure drop across the
suction and liquid drier after the first 1½ hours of
operation. Pressure drop across a liquid line drier should
not exceed 5 PSI and the suction line filter-drier should
not exceed 3 PSI.
After 8 to 24 hours, take an oil sample and test with an
acid test kit. If the oil dirty or acidic, change the suction
line and liquid line filter drier and recheck after 8 hours of
compressor operation.
After two weeks, recheck oil acidity to see if another
change of suction line and liquid line filter-drier is
necessary.
In some cases non-condensable gases are produced
during the burnout. Compare the equalized head
pressure with the pressure (equivalent) to the outdoor
temperature. If the pressures are different, then the
system should be purged.
System cleaning after compressor mechanical failures:
Mechanical compressor failures such as oil pump, valve
plates, etc. may not necessarily contaminate the system.
Check oil of defective compressor by means of an oil
acid kit and check compressor for shorts, grounds and
continuity- if all checks negative, then it is only
necessary to evacuate replacement or repaired
compressor and install a new liquid line drier. Make an
acid test after 8 hours of operation.
ORDERING PARTS
When reporting shortages or damaged parts, give the
complete unit model and serial number which is stamped
on the unit rating plate. These units are made special to
order and the following parts list should only be used as
a guide. Do not order parts from these lists.
Cooling Performance Data at 200 CFM Per Ton
Evaporator Inlet Air
°F
Evaporator Inlet-
Outlet Air Temp
Differential, DB°F
High Side Pressure
psig
Condenser
Inlet Air
Dry Bulb°F
Dry
Bulb
Wet
Bulb Min. Max. Min. Max.
105 105
87
82
58
33
33
38
315
310
345
340
95 95
80
75
37
32
32
37
275
270
305
300
85 85
72
67
26
31
31
36
230
225
260
255
75 75
65*
60*
22
26
27
31
215
210
245
240
*Condenser fan at part load RPM, unit at partload operation
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