Bunn CWT Service Manual download pdf (Page 24)

Page 24

SERVICE (cont.)

with a voltmeter when the "ON/OFF" switch is in the

"ON" position (upper) and start switch pressed.

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 volt or

230 volt models.

6. Disconnect the brewer from the power source.

7. Reconnect the three pin connector from main

wiring harness to the timer.

If voltage is present as described, proceed to #7

If voltage is not present as described, refer to Wiring

Diagrams and check the brewer wiring harness.

7. Disconnect the black and white wires from the

solenoid.

8. Check the voltage across the black and white

wires with a voltmeter when the "ON/OFF" switch

is in the "ON" position (upper) and the "START"

switch is pressed to the "START" position (lower)

and released. Connect the brewer to the power

source. The indication must be:

a) 120 volts ac for approximately 20 seconds for

two wire 120 volt models and three wire 120/240

volt models.

b) 200 to 230 volts ac for approximately 20 sec-

onds for two wire 200 volt or 230 volt models.

If voltage is present as described, the brew timer is

operating properly. Reset the timer dial as required,

to obtain the desired brew volume.

If voltage is not present as described, replace the

timer.

Removal and Replacement (Dial Timer):

1. Disconnect the timer socket from the brewer wir-

ing harness and the timer leads from the solenoid

valve.

2. Remove the one #8-32 screw securing timer to

component bracket.

3 Install new timer on component bracket securing

with one #8-32 screw.

4. Refer to the following illustration when recon-

necting the wires.

5. Readjust the timer dial as required.

10841 020503

DIAL TIMER (Early Models) - CT & CWT

Location:

The timer is located inside the front of the

trunk on the upper right side of component bracket.

Test Procedure (Dial Timer).

1. Disconnect the brewer from the power source.

2. Disconnect the polarized, three pin connector

from the brewer wiring harness and rotate the

brew timer dial fully counterclockwise.

3. Check the voltage across sockets P2 & P3 (white

and black wires) of the female connector with a

voltmeter when the "ON/OFF" is in the "ON" posi-

tion (upper). 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 on two wire 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 har-

ness.

5. Check the voltage across the sockets P1 & P2

(blue and white wires) of the female connector

P1153

Dial Timer

FIG. 19 TIMER LOCATION

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 30 31 32

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Bunn CWT Service Manual Page 24

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