Stoelting O231, Руководство по обслуживанию

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5.4 COMPRESSOR
The O231 has three hermetic reciprocating compressors:
two for the freezing cylinders and one for the hoppers.(Refer
to Figure 5-2 and 5-3).
A. WINDING TEST
To test the motor windings for possible problems, perform
the following steps:
A. Disconnect the machine from electrical supply
before removing any panels for servicing.
B. Remove the panels to gain access to the
compressor terminals.
C. Remove the protective cover from the compressor
terminals. Disconnect the three terminals; C
(common), R (run), and S (start).
D. Connect an ohmmeter to the C and R terminals on
the compressor. Resistance through the run winding
should be as follows:
Freezing Cylinder Compressor: 0
Ω
±10%
Hopper Compressor: 10.2
Ω
±10%
E. Connect an ohmmeter to the C and S terminals on
the compressor. Resistance through the start
winding should be as follows:
Freezing Cylinder Compressor: 1.609
Ω
±10%
Hopper Compressor: 16.4
Ω
±10%
F. To check if windings are shorted to ground, connect
one ohmmeter lead to a bare metal part on the
compressor (such as any copper line leading to or
from the compressor) and check terminals C, R,
and S.
B. COMPRESSOR REMOVAL
A. Disconnect the machine from electrical supply
before removing any panels for servicing.
B. Remove the back panel.
C. Remove the protective cover from the compressor
terminals and disconnect the wires.
D. Recover refrigerant charge per the instructions in
Section 5.2.
E. Leave the suction and discharge ports open to
prevent pressure buildup during compressor
removal.
F. Remove six inches of insulating tubing on the
suction line going to the compressor and unsweat
the suction and discharge line from the compressor.
G. Remove the four nuts and washers from the base
of the compressor.
H. Remove the compressor through the front of the
machine.
I. Remove the four rubber compressor mounts from
the compressor.
J. Crimp and braze all open ports of the old
compressor.
NOTE
A compressor returned to Stoelting with any open
ports will void the warranty. ALWAYS crimp and braze
ports on a compressor that has been removed.
WARNING
Hazardous voltage
Make sure the machine is off when disassembling
for servicing. The machine must be disconnected
from electrical supply before removing any access
panel. Failure to disconnect power before servicing
could result in death or serious injury.
Figure 5-3 Hopper Compressor
Figure 5-2 Freezing Cylinder Compressor