Reznor MASA Unit Installation Manual - Manual (Page 32)

Form I-COND, P/N 220746R6, Page 32
10.5 Compressor
Maintenance
and
Replacement
(cont’d)
10.0 Maintenance
and Service
(cont’d)
b) Install a temporary filter drier in the suction line. When there is acid, a
100% activated alumina suction filter drier is recommended. The suc-
tion line drier should be sized properly for the circuit and have a service
access fitting to monitor pressure drop across the drier. (NOTE: Suction
line filter drier must be removed after 72 hours of operation.)
Step 12 includes the remaining procedures required for cleanup of a
burnout. Continue to Step 5.
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Step 5. Braze on Suction and Discharge Lines
Comply with the brazing instructions in Paragraph 6.1.3.6.
□
Step 6. Check Circuit for Leaks
Comply with instructions in Paragraph 6.2.1.
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Step 7. Evacuate the Circuit
Comply with instructions in Paragraph 6.3.
Continue and/or repeat Steps 6 and 7 until evacuation is complete.
CAUTION
Do not use the replacement compressor as an evacuation
assist and never apply voltage to a compressor while it is in
a vacuum. See Hazard Levels, page 3.
Moisture and air are harmful to the system because they increase the con-
densing temperature, raise the discharge gas temperature, cause formation
of acids, and cause oil breakdown.
CAUTION
Do not leave a circuit open to the atmosphere any longer than
minimum required for installation. POE oil in the compressor
is extremely susceptible to moisture absorption. Evacuation
will not remove moisture from POE oil. See Hazard Levels,
page 3.
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Step 8. Check the Electrical System
After the system has been evacuated, reconnect the electrical plug to the
compressor or the wires to the compressor terminals. It is a normal prac-
tice to replace all starting components any time a compressor is changed.
WARNING
Do not apply voltage to the compressor when the plug is
removed or terminals disconnected. See Hazard Levels, page
3.
Crankcase Heater
Connect the crankcase heater. The crankcase heater is energized continu-
ously and is extremely important to proper compressor operation and long
life.
The crankcase heater must be energized for at least 24 hours before start-
ing the unit or after a power outage of more than 8 hours. Be sure to disable
cooling controls before turning on power to warmup crankcase heaters.
□
Step 4. Install New Filter Driers (cont’d)