Vollrath Stoelting O431, Service Manual

Page: 51 / 75

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3. Remove the mix containers and sliding drawer
from the cab.
4. Disconnect the tubing from the mix transfer line
and the air line at the top of the cab.
5. Pull thermistor out of the clip and thread it up
through the hole in the fan shroud.
6. Remove the two screws at the front of the cab
shroud and pivot the shroud downward. Remove
the shroud.
7. Remove the two fan bracket screws and
disconnect wires on the fan motor.
8. Connect the wires to the new fan motor.
9. Attach the two screws to the fan motor bracket.
10. Thread thermistor through hole in fan shroud and
attach it to the clip.
11. Align the two pins at the top rear of the cab to the
pivot points on the evaporator shroud.
12. Install the evaporator shroud with the two screws.
13. Install all tubes and replace sliding drawer and
mix containers.
6.8 SWITCHES
A. SPIGOT SWITCH
The spigot switch is a normally closed, held open switch.
When a spigot is pulled, the spigot switch sends a signal
to the IntelliTec control to start the auger drive and refrig-
eration system. This signal moves the control to “Serve
Mode”, or if it already is in “Serve Mode”, it resets the
cycle count. After serving product, the IntelliTec continues
a freezing cycle until the product reaches consistency.
SPIGOT SWITCH TEST - ADJUSTMENT
NOTE
Adjustments to the spigot switch should be done
after the product is at consistency in “Serve Mode”
or when the machine is empty.
1. Open the spigot slowly and listen for a click when
the spigot switch closes.
2. The clicking sound should be within the fi rst 1/2”
of the spigot glide movement (Refer to Figure
6-8). If the switch does not close, an adjustment
may be necessary.
SPIGOT SWITCH TESTING - ELECTRICAL
1. Disconnect the switch from the circuit by
unplugging the connectors.
2. Check resistance readings across the common
(COM) and normally closed (NC) terminals. When
the spigot is closed, the resistance should show
an open. When the spigot is opened, the switch
will close and the resistance should be 0 ohms.
SPIGOT SWITCH ADJUSTMENT
1. Place the Main Power OFF/ON switch and both
Freezing Cylinder OFF/ON switches in the OFF
position.
2. Remove the header panel.
3. Loosen the bolts on the spigot switch.
4. Using a pencil, mark the spigot glide 1/4” from
the spigot housing.
5. Adjust the switch to activate when the plastic glide
reaches the mark.
6. Fully tighten the retaining bolts and remove mark
from spigot glide.
WARNING
Hazardous voltage
The Main Freezer Power switch must be placed in
the OFF position 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.
Spigot Glide
COM
NC
Figure 6-8 Spigot Cam Assembly
Figure 6-9 Spigot Switch Replacement