Overfill Control Switch; Overfill Protection Float Standpipe - Hobart KitchenAid KD-18 SERIES Service Manual

Fig. 22
Overfill Control Switch ( 1, Fig. 22)
The normally closed overfill control switch is an
electrically operated safety device in series with
the fill valve. This safety device will operate only if
the timer stalls during fill cycle or if the dish-
washer fails to drain. It will not protect the fill
valve against a malfunction caused by foreign
material or a mechanical failure .
Excessive water in tank (approx. 1/4" below hub
of hydro sweep) actuates the overfill control
switch, opening fill valve circuit.
This switch is permanently factory adjusted and
has automatic reset. DO NOT ATTEMPT TO
ADJUST.
To disassemble from dishwasher:
I. Remove lower front panel (I, Fig. II).
2. Remove staple from cover.
3. Open cover and remove retaining screw.
4. Disconnect electrical lead wires to switch.
Overfill Protection Float Standpipe (Fig. 23)
Should the tank reach an excessive level
(approx . 14 quarts), the overflow protection float
will prevent flooding by shutting off the fill valve.
The float is located inside the left front comer of
the tank.
To dissassemble from dishwasher:
I . Remove lower front panel ( 1, Fig. 11 ).
2. Remove overfill control float (I, Fig. 23).
3. Remove standpipe nut (2, Fig. 23) from
inside tank.
4. Remove standpipe ( 4, Fig. 23) and gasket (3,
Fig. 23) from beneath tank.
5. When reassembling standpipe, make sure
gasket is on stem before inserting stem
through the tank.
6. Using a tool, securely tighten standpipe nut
(2, Fig. 23 ).
Thermostat and Thermal Protector (KDS Only) (I
& 2, Fig. 24)
A thermostat
(1,
Fig. 24) (KDS only) controls
the water heater during the Sani Cycle. It holds
the timer motor circuit open (preventing timer
advancement) until the water reaches ap-
proximately 180° F. at which time the thermostat
closes, allowing the timer to advance.
The automatic thermal protector (2, Fig. 24) is a
normally closed safety device . If for any reason
the sump temperature exceeds approximately
200° F. the protector contacts open, stopping
current flow to the 1400 watt water heater. It
does not interrupt dishwasher cycle. It will auto-
matically reset at approx. 150° F.
To Service:
- 16 -
I. Remove lower front panel
(l,
Fig. II).
2. Remove thermostat cover.
3. Disassemble thermostat and thermal pro-
tector by rotating them out of mounting
spring (3, Fig. 24).
Fig. 23