Bunn DV User Manual

Page 13

SERVICE (cont.)

Safety Overfl ow Switch

Location:
The safety overfl ow switch is located inside the rear of
the dispenser inside the copper overfl ow cup.
For testing or removal of the safety overfl ow switch,
access may also be needed by removing the two screws
attaching the electronic control assembly to its mount-
ing bracket.

Test Procedure:
1. Once voltage is verifi ed at the power source, check

for continuity across the safety overfl ow switch
red wires only until the plastic fl oat is raised and
check that continuity returns when the plastic fl oat
is again lowered.

If continuity is present as described, reconnect each
of the red wires to the black wires, the safety overfl ow
switch is operating properly.
If continuity is not present as described, replace the
safety overfl ow switch.

FIG. 13a SAFETY OVERFLOW SWITCH

FIG. 13c SAFETY OVERFLOW WIRING

RED to BLK Wire from
Terminal Block

RED to BLK Wire from Elec-
tronic Control #3

P4093

P1777

Removal and Replacement:
1. Disconnect the black wires from the safety overfl ow

switch.

2. Remove the nut beneath the copper overfl ow cup.
3. Remove the entire switch assembly from the cup.
4. Place the new switch assembly into the cup, wires

fi rst. Make sure that a gasket is in place around the
threaded switch stem.

NOTE - The magnets must be at the top of the fl oat and
there must be NO stainless steel washers installed for
the safety overfl ow switch to operate properly.

5. Install the nut beneath the copper overfl ow cup.

Be sure not to overtighten.

6. Reconnect the wires, FIG. 6.

P1993

FIG. 13b OVERFLOW PROTECTION SWITCH

42311 071310

H 10

H 5