Overflow Protection Switch - Bunn HC-2 HC-3 Operating & Service Manual

SERVICE (cont.)

OVERFLOW PROTECTION SWITCH

FIG. 21 OVERFLOW PROTECTION SWITCH
Location:
The overflow protection switch is located in-
side the copper overflow cup on the upper front of
the tank.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Remove the wire nuts connecting the red wires
from the overflow protection switch to the black
wire from the terminal block and blue wire from the
liquid level board.
3. Check for continuity across the safety overflow
switch red wires only until the plastic float is raised
and check that continuity returns when the plastic
float is again lowered.
If continuity is present as described, reconnect the
red wires to the black wire from the terminal block
and the blue wire from the liquid level board.
If continuity is not present as described, replace the
overflow protection switch.
Removal and Replacement:
1. Disconnect the red leads from the overflow pro-
tection switch from the black wire from the termi-
nal block and the blue wire from the liquid level
board.
2. Remove the nut beneath the copper overflow cup.
3. Remove the entire switch assembly from the cup.
4. Place the new switch assembly into the cup, wires
first. Make sure that a gasket is in place around the
threaded switch stem.
NOTE - The magnets must be at the top of float and
there must be NO adjusting washers installed for
the overflow protection switch to operate prop-
erly.
5. Install the nut beneath the copper overflow cup. Be
sure not to overtighten.
6. Refer to the illustration below when reconnecting
wires.
P1199.45
RED to BLK Wire
from Terminal
Block
FIG. 22 OVERFLOW PROTECTION
28
RED to BLU Lead
from Liquid Level
Board
SWITCH LEADS
P1212
27591 111596