Stoelting E157, Service Manual

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10.Break the vacuum (0 P.S.I.G.) through the Schrader
valve with the dry nitrogen.
11.Leaving a port open to prevent pressure build-up,
remove the filter drier and install a new filter drier using
the appropriate brazing material (Fig.46).
12.Purge and evacuate the refrigeration system to 50
microns of mercury for approximately 30 minutes.
13.Accurately charge the system with the amount and
type of refrigerant indicated on the freezer Model I.D.
plate.
14.Leak check all fittings and connections.
7.6 DRIVE MOTOR INSTALLATION
To install a serviceable drive motor, perform the following
procedures:
WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPLY SOURCE BEFORE SERVICING.
1. With the necessary panels removed for removal of a
defective drive motor, install the drive motor through
either side of the freezer and position mounting flange
over the bearing and line up the three holes.
2. Install the three socket head screws securing the
mounting flange to the freezer and tighten.
3. Connect the wire leading from the drive motor to the
reset switch.
4. Connect the lead wire to the drive motor capacitor.
5. Connect tension spring and adjust to 3 1/16"-3 1/8"
(Fig.47).
Figure 46. Remove Filter Drier
6. Replace necessary panels.
7.7 CONDENSER FAN INSTALLATION
To install a serviceable condenser fan, perform the follow-
ing procedures:
WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPLY SOURCE BEFORE SERVICING.
1. Assuming the necessary panels have been removed
to remove a defective condenser fan, install a new con-
denser fan bracket through the side of the freezer and
align the holes in the fan brackets with the holes in the
condenser fan shroud attached to the freezer frame
(Fig.48).
2. Using a 5/16" nut driver or a phillips head screwdriver,
install the four screws securing the fan supports to the
mounting brackets.
3. Connect the condenser fan lead wires.
Ë Ë
Ë Ë
Ë
É É É É É
Figure 48. Fan Installation
Figure 47. Tension Spring
Filter Drier
Æ Æ Æ Æ Æ Æ Æ Æ Æ Æ
3-1/16"
3-1/8"
(3-5/8" F257)
Fastening Screws