SERVICE (cont.)

TIMER (ELECTRO/MECHANICAL ONLY)(EARLY MODELS)

OLD STYLE

P1093

FIG. 29 TIMER

Location:

The timer is located inside the right front of the brewer on the upper part of the component bracket.

tion. Select the 2 gallon batch setting. Connect the brewer to the power source and press the start switch. The indication must be:

a.)120 volts ac for three wire 120/208 volt models and three wire 120/240 volt models for approxi- mately 1 minute 20 seconds for 2 gallon batch. b.) 200 to 240 volts ac for two wire 200 or 240 volt models for approximately 1 minute 20 seconds for 2 gallon batch.

7.Select a 1-1/2 gallon batch and repeat #6. The voltage indication should remain for approximately 1 minute.

8.Select a 1 gallon batch and repeat #6. The indica-

tion should remain approximately 40 seconds. If voltage is present as described the timer is function- ing properly.

If voltage is not present as described, replace the timer and adjust the dial(s) as required.

 

Removal and Replacement:

 

 

Test Procedures:

1. Remove all wires from the timer.

 

 

1. Disconnect the brewer from the power source.

2. Remove the two #6-32 keps nuts holding circuit

2. Disconnect the wires from the timer terminals

 

board and two #8-32 keps holding dial plate on to

TL3, TL4 and TL5 and rotate the dial(s) fully

 

the component mounting bracket.

 

 

counterclockwise.

3. Remove circuit board, nylon spacers and

dial

3. With a voltmeter, check the voltage across termi-

 

plate.

 

 

nals TL1 and TL2 when the "ON/OFF (Warmer)"

4. Install new timer directly to component mounting

switch is in the "ON" (upper) position. Connect the

 

bracket as described in Late Model Timer Section.

brewer to the power source. The indication must

5. Refer to Fig. 32 when reconnecting wires.

 

 

be:

6. Install the Timer Setting Decal, provided with the

a.)120 volts ac for three wire 120/208 volt models

 

replacement timer, on the inside of the front ac-

and three wire 120/240 volt models.

 

cess panel.

 

 

b.) 200 to 240 volts ac for two wire 200 or 240 volt

7. Adjust the timer as required. Refer to Late Model

models.

 

Timer Section on the following pages.

 

 

4. Disconnect the brewer from the power source.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

OLD STYLE

 

 

If voltage is not present as described, refer to the

 

 

 

 

 

 

 

 

 

 

 

Wiring Diagrams and check the brewer wiring har-

 

 

 

 

 

 

 

 

 

 

 

ness.

 

 

 

 

 

 

 

 

 

 

 

5. Check for continuity across the white/orange wire

 

 

 

 

 

 

 

WHI/VIO TL1 to ON/OFF Switch

 

 

 

 

 

 

 

 

 

 

and white/yellow wire when the start switch is

 

 

 

 

 

 

 

WHI TL2 to Terminal BLock (WHI Insert)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

pressed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(120/208V or 120/240V Three Pole Ter-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

minal Block)

 

 

If continuity is present as described, reconnect the

 

 

 

 

 

 

 

RED TL2 to Terminal Block (RED Insert)

 

 

 

 

 

 

 

(200V or 240V Two Pole Terminal Block)

wires to terminals TL3, TL4 and TL5 of the timer board

 

 

 

 

 

 

 

WHI/ORN TL3 to Start Swtich

 

 

and proceed to #6.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/GRN TL4 to Dispense Valve

 

 

6. With a voltmeter, check the voltage across termi-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHI/YEL TL5 to Start Switch

 

 

nals TL1 and TL4 with a voltmeter when the "ON/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P1109

OFF (Warmer)" switch is in the "ON" (upper) posi-

 

 

 

 

 

 

 

 

 

 

 

FIG. 30 TIMER TERMINALS

 

 

 

 

 

 

 

 

Page 34

27362

092900

 

 

Page 34
Image 34
Bunn System III manual Timer ELECTRO/MECHANICAL Onlyearly Models

System III specifications

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