Vollrath Stoelting E111I, Service Manual

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5.4 COMPRESSOR
The E111 & F111 have hermetic reciprocating compressors
(Refer to Figure 5-2).
Details of the compressors’ starting components are in
Section 6.
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 left side 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 as follows:
E111: 3.05
Ω
±10%
F111: 3.09
Ω
±10%
E. Connect an ohmmeter to the C and S terminals on
the compressor. Resistance through the start
winding should be as follows:
E111: 10.45
Ω
±10%
F111: 3.82
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.
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. Disconnect the electrical plug from the compressor.
C. Recover refrigerant charge per the instructions in
Section 5.2.
D. Leave the suction and discharge ports open to
prevent pressure buildup during compressor
removal.
E. Remove six inches of insulating tubing on the
suction line going to the compressor and unsweat
the suction and discharge line from the compressor.
F. Remove the four nuts and washers from the base
of the compressor.
G. Remove the compressor.
H. Remove the four rubber compressor mounts from
the compressor.
I. 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.
C. COMPRESSOR INSTALLATION
A. Disconnect the machine from electrical supply
before removing any panels for servicing.
B. Install the four rubber mounts on the compressor.
C. Install the compressor into the machine, fitting the
base over the four bolt holes.
D. Install the four washers and nuts onto the bolts and
tighten securely.
E. Remove all tubing plugs from the replacement
compressor.
NOTE
The compressor plugs protect the compressor from
moisture in the air. Do not remove the plugs until
you are ready to install. The compressor must not
be opened to the atmosphere for more than 10 min-
utes.
Figure 5-2 Compressor
WARNING
Hazardous voltage
The Main Freezer Power switch must be placed in
the OFF position when disassembling for servic-
ing. The machine must be disconnected from elec-
trical supply before removing any access panel. Fail-
ure to disconnect power before servicing could re-
sult in death or serious injury.