Bunn Single SH Guía Del Usuario

Page 25

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 thermostat.

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 Fig. 17 when reconnecting wires.

Location:

The overflow protection switch is located inside

the hood on the tank inside the copper overflow cup.

To test the overflow protection switch, access will

also be needed to the level control board  and terminal
block.

Test Procedure:
1. Disconnect the brewer 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
thermostat.

3. Check for continuity across the overflow protec-

tion 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 thermostat.
If continuity is not present as described, replace the
overflow protection switch.

P834

FIG. 16 OVERFLOW PROTECTION SWITCH

FIG. 17 OVERFLOW PROTECTION SWITCH

LEADS

22978.0000

SE

T    

 LO

CK

LOCK

SET

90 psig max operating pressure

Strainer/Flow Control # 22300.033  0

(Repl. Flow Washer #20526.0330)

(Repl. Screen #23721.0000)

.500 gpm FLOW

P2230

RED to BLU Lead 
from Thermostat or to
VIO Wire from Electronic
Control Assy

RED to BLK Wire from
Terminal Block

28230 092200