29
SERVICING AND MAINTENANCE
General:
Qualified technicians must perform routine
service checks and maintenance. This includes
reading and recording the condensing and suction
pressures and checking for normal sub-cooling
and superheat (see Charging Refrigerant:).
Air-cooled and evaporative condenser units
require
different
maintenance
schedules/procedures. Unit specific instructions
for both types are included in this manual.
Compressors:
The scroll compressors are fully hermetic and
require no maintenance except keeping the shell
clean.
Refrigerant Suction Line Filter:
Each refrigerant circuit contains a replaceable
core suction line filter.
One month after start-
up
, remove the filter element.
The replaceable core suction filters are provided
with pressure taps and shutoff valves for isolation
when removing the filter. For safety purposes a
service manifold must be attached prior to filter
maintenance.
Suction Filter Removal Instructions
1.
Shut down operation of the unit
2.
Close both shut-off valves to isolate the
suction filter
3.
Reclaim the refrigerant from the suction
filter section
4.
Remove the bolts from the suction filter
end plate
5.
Remove the pleated filter assembly
6.
Replace the suction filter end plate and
bolts
7.
Evacuate the suction filter assembly to
500 microns
8.
Open both shut-off valves
Prior to filter core service, a service
manifold MUST BE attached to in and
out pressure connections to assure no
pressure
exists
during
filter
maintenance. Non-compliance could
result in injury or violation of EPA
regulations.
Service gauges MUST BE connected
before operating the isolation valves
for the replaceable core filter.
WARNING
WARNING
