Bunn CWT Service Manual download pdf (Page 22)

Page 22

SERVICE (cont.)

TANK HEATER (Cont.)

TANK HEATER SWITCH

Location:

The tank heater switch is located on the rear

of the brewer on the upper left side of the trunk.

Test Procedure:

1. Disconnect the brewer from the power source.

2. Disconnect the black wire from the limit thermo-

stat.

3. With the tank heater switch in the "ON" position

check the voltage between the black wire removed

from the limit thermostat and the white wire or red

wire on the tank heater with a voltmeter. Connect

the brewer to the power source. The indication

must be:

a) 120V volts ac on two wire 120 volt models.

b) 240 volts ac on three wire 120/240 volt mod-

els.

c) 200 to 230 volts ac on 200 volt or 230 volt

models.

4. Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to the Wiring

Diagrams and check the brewer wiring harness.

P1153

10841 020503

P1168

WHI to Terminal Block

(White Insert on 120V

Two Wire Models)

RED to Terminal Block

(Red Insert on 120/240V

Threee wire Models or

200V and 230V Two

Wire Models)

BLK to Control Ther-

mostat (Brewers W/Out

Faucet) Thermal Cut-Off

to BLK from Control

Thermostat (Brewers

W/Faucet

14. Install sprayhead.

15. Reconnect the wires to the limit thermostat,

tank heater and control thermostat. See limit

thermostat and control thermostat sections in

this manual when reconnecting wires.

16. Install ﬁll basin, secure with tank inlet ﬁtting and

gasket. Insert water supply line through grommet

in ﬁll basin.

17. Refer to the illustration below when reconnecting

the tank heater wires.

FIG. 16 TANK HEATER WIRING

FIG. 17 TANK HEATER SWITCH LOCATION

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 31 32

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Bunn CWT Service Manual Page 22

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