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Removal and Replacement:
1. Disconnect the red leads from the overflow pro-
tection switch from the black wire from the termi-
nal block or DBC board assembly and the blue wire
from the thermostat or red wire from DBC board
assembly.
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. 22 when reconnecting wires.
OVERFLOW PROTECTION SWITCH
SERVICE (cont.)
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 or DBC board
assembly 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 or DBC board assem-
bly, and blue wire from the thermostat or the red
wire from the DBC board assembly.
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 or DBC
Board Assembly, and the blue wire from the thermo-
stat or red wire from DBC board assembly.
If continuity is not present as described, replace the
overflow protection switch.
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P2231.35
P1103
FIG. 21 OVERFLOW PROTECTION SWITCH
RED to BLK Wire from
Terminal Block (Electro/
Mechanical)
RED to BLK Wire from
DBC Board J3-12
RED to BLU Lead from Ther-
mostat (Electro/Mechani-
cal)
RED to RED Wire from DBC
Board J3-11
FIG. 22 OVERFLOW PROTECTION
SWITCH TERMINALS
27362 092996