Vollrath Stoelting F231, Service Manual, Page: 37 / 63

Service Manual #513659 29 Model F231
5.4 COMPRESSOR
The F231 has a hermetic reciprocating compressor (Refer
to Figure 5-2).
A. WINDING TEST
To test the compressor motor windings for possible prob-
lems, perform the following steps:
A.
Disconnect the machine from electrical supply
before removing any panels for servicing.
B. Remove the front panel.
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 1.16

±10%.
E. Connect an ohmmeter to the C and S terminals
on the compressor. Resistance through the start
winding should be 3.10

±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.
NOTE
The compressor is equipped with an internal over-
load protector. If the compressor is warm and ohm-
meter readings indicate an open winding, allow up
to one hour for overload to reset.
B. COMPRESSOR REMOVAL
A. Disconnect the machine from electrical supply
before removing any panels for servicing.
B. Remove the front 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 re-
moved.
C. COMPRESSOR INSTALLATION
A. Make sure the machine is disconnected from the
electrical supply before removing any panels for
servicing.
B. Install the four rubber mounts on the compressor.
C. Install the compressor into the machine, fi tting
the base over the four bolt holes.
D. Install the four washers and nuts onto the bolts
and tighten securely.
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 5-2 Compressor