HEC-Series Service Manual
MAINTENANCE
10/21/01
7-6
Lubrication
Compressor.
In starting and charging the unit, the oil sight glass (33) in the crankcase of the
compressor should be watched carefully for the first hour to make certain the proper lubrication is
being maintained. The oil may become low in the crankcase on an initial start-up if the electrical
current has been interrupted to the machine, thus de-energizing the compressor crankcase heater.
Before starting the machine again, the heater should be energized for a time period of at least two
hours to evaporate refrigerant that may have condensed in the crankcase during the shutdown period.
If level is low after start-up, it should begin to return after a short period of operation.
The oil level should be checked frequently, particularly during the start-up operation, to see that a
sufficient amount of oil remains in the crankcase. While it is important to observe the oil splash
during operation, the true level can be obtained only when the compressor is stopped. With the
compressor idle, the oil level should be at a height of 1/4 to 1/2 of the sight glass but never out of
sight above it.
Although the machine was shipped with the oil charge, which was originally added for the test
operation, it may be necessary to add some oil when or if new refrigerant is added to the system.
An oil pump should be used to force any oil that may be required into the system. Oil may be added
to the compressor of all units through the low pressure test connection adjacent to the high/low
pressure switch or through the compressor suction service valve. The compressor suction service
valve should be “backseated” to shut off pressure to the gauge port when connecting the oil pump.
Air should be purged from the oil pump discharge line by forcing some oil through the line before
tightening the charging connection.
For HEC-10, HEC-20 (with Copeland scroll), HEC-30, and HEC-40 use “Dual Inhibited Sunisco
3GS” (Viscosity 150) or equal.
Do not use a synthetic substitute.
For HEC-20 with Carlyle
Scroll compressor use Zerol 150 oil.
Cutter Gear Reducer.
The oil level for the gear reducer should be checked if there is evidence of a
leak. It should be level with the plugged opening in the side of the gear housing. Use Mobile 600W
cylinder oil or equal. Change oil once a year.
Summary of Contents for HEC-10
Page 1: ...HEC SERVICE MANUAL ...
Page 95: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 13 FIGURE 9 9 Cutter Water Tank Parts ...
Page 96: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 14 FIGURE 9 10 Cutter Drive Parts ...
Page 97: ...HEC Series Service Manual SERVICE OPERATIONS 10 21 01 9 15 FIGURE 9 11 Cutter Parts ...
Page 106: ...HEC Series Service Manual MODEL NUMBER STRUCTURE 10 21 01 10 1 10 Model Number Structure ...
