Bunn CWT Service Manual download pdf (Page 18)

Page 18

Connect wire to Terminal #1 as follows:

Lower Warmer ........................................................ WHI/RED

One Top Warmer .............................................................. VIO

Two Top Warmers

(Front) ..................................................................... BRN/BLK

(Rear) ............................................................................... VIO

Two Top Warmers (1 Switch) ........................................... VIO

Side Warmers

(Front) ..................................................................... BRN/BLK

(Rear) ............................................................................... VIO

Test Procedure:

1. Disconnect the brewer from the power

source.

2. Viewing the switch from the back remove the

white or red wire from the upper terminal and

the black wire from the center terminal.

3. Check the voltage across the white wire or red

wire and the black wire with a voltmeter. Connect

the brewer to the power source. The indication

must be:

a) 120 volts ac for two wire 120 volt models and

three wire 120/240 volt models.

b) 200 to 230 volts ac for two wire 200 or 230

volt models.

4. Disconnect the brewer from the power source.

If voltage is present as described, reconnect the white

or red wire and proceed to #5.

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

Diagrams and check the brewer wiring harness.

5. With the black wire removed, remove the wire

from the lower terminal.

6. Check for continuity across the center and lower

terminal with the switch in the "ON" position.

Continuity must not be present when the switch

is in the "OFF" position.

If continuity is present as described, reconnect the

black wire to the center terminal and the wire to the

lower terminal.

If continuity is not present as described, replace the

switch.

Removal and Replacement:

1. Remove the wires from the switch terminals.

2. Compress the clips inside the hood and gently

push the switch through the opening.

3. Push the new switch into the opening and spread

the clips to hold switch in the hood.

4. Refer to the following illustration when recon-

necting the wires.

SERVICE (cont.)

ON/OFF SWITCH (cont.)

P1918

WHI to Terminal Block (White

Insert on 120V or 120/240V

Models)

RED to Terminal Block (Red

Insert on 200V or 230V

Models)

BLK to Terminal Block (Black

Insert)

Terminal #1 (See chart below)

10841 071000

FIG. 8 ON/OFF SWITCH WIRING

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 31 32

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Bunn CWT Service Manual Page 18

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