System Maintenance - McQuay seasoncon ALP-067A Installation And Maintenance Data

General
On initial start up and periodically during operation it will be
necessary to perform certain routine service checks.
are checking the compressor oil level and taking condensing, suc-
tion and oil pressure readings.
should be visible in the oil sight glass with the compressor run-
ning. On units ordered with gauges, condensing,suction and oil
pressures can be read from the unit control center.
are factory installed with a manual shutoff valve on each gauge
line. The valves should be closed at all times except when gauge
readings are being taken.
gauge shutoff valves come factory installed inside the unit control
center for convenient connection of service gauges form outside the
unit.
Fan Shaft Bearings
The fan shaft bearings do not require lubrication at the time the
unit is put into service.
once a year using STANDARD OIL COMPANY AMCO Multi-Purpose Lithium
DO NOT OVERLUBRICATE.
Grease.
Fan Motor Bearings
All fan motors are ball bearing, pre-lubricated and do not require
the addition of grease at the time of installation.
the ball bearings should be cleaned and the grease renewed, to gain
the ultimate in service from the motor bearings.
Extreme care must be exercised to prevent foreign matter from enter-
ing the ball bearings.
Only a high grade clean mineral grease having the following charac-
teristics should be used.
of Vaseline, maintained over the operating temperature range; melting
point preferably over 150C (302OF); freedom from separation of oil
and soap under operating and storage conditions and freedom from a-
brasive matter, acid, alkali and moisture.
Specific greasing instructions are to be found on the label attached
to the unit and should be generally followed.
Electrical Terminals
ELECTRIC SHOCK HAZARD, TURN OFF ALL POWER BEFORE CONTINU-
CAUTION:
ING WITH FOLLOWING SERVICE.
All power electrical terminals should be retightened every 6 months,
as they tend to loosen in service due to normal heating and cooling
at the wire.
Compressor Oil Level
Because of the large refrigerant charge required in an air cooled
condensing unit it is usually necessary to put additional oil into
the system. The oil level should be watched carefully upon initial
start up and for sometime thereafter.

SYSTEM MAINTENANCE

During operation, the oil level
On units ordered without gauges, the
The fan shaft bearings should be greased
It is also important to avoid overgreasing.
Consistency:
Among these
The gauges
Periodically,
A little stiffer than that
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