Bunn DV User Manual download pdf (Page 11)

SERVICE (cont.)

Electronic Controls (cont.)

If voltage was present as described, the temperature

control of the system is operating properly.

If voltage was not present as described, contact

Bunn-O-Matic to order an electronic control board and

temperature sensor for evaluation and proceed to #9.

6. Replace the electronic control board.

7. Check the voltage across the tank heater terminals

with a voltmeter. Connect the dispenser to the

power source. The indication must be:

a.) 100 to 120 volts ac for 100 to 120 volt models

b.) 200 to 240 volts ac for 200 to 240 volt models

c.) 230 volts ac for 230 volt models

8. Disconnect the dispenser from the power source.

If voltage was present as described, the temperature

control of the system is operating properly. Return the

new electronic control board or temperature sensor to

Bunn-O-Matic for credit.

Electronic Controls Removal and Replacement

1. Remove all wires from the electronic control board

terminals.

2. Remove the six 6-32 screws holding the electronic

control board to the component bracket.

3. Disconnect the temperature sensor, overﬂ ow tube

temperature sensor, and indicator wires from the

electronic control board.

4. Attach the temperature sensor, overflow tube

temperature sensor, and indicator wires to the

electronic control assembly.

5. Fasten the new electronic control board to its

bracket.

6. Refer to Fig 2 when reconnecting the wires.

7. Review the initial set-up procedures on page 6.

FIG. 11a WIRING CONNECTIONS

Adjustments

The H5X/H10X dispensers hold the water tempera-

ture at the threshold of boiling. It is not adjustable by

the user.

The H5E dispenser is factory calibrated for the

temperature speciﬁ ed on the data plate. If adjustment

is required, use the following procedure:

1. Fill the dispenser according to the steps in the Initial

Set-up.

2. Take the temperature of the stream of water im-

mediately below the faucet as it ﬂ ows from the

dispenser with an accurate thermometer. Do not

take the temperature of water collected in a con-

tainer.

3. If any adjustment is required, refer to LEVEL 1

PROGRAMMING in the Operating Manual.

J3 PNK & GRY to

Heater Indicator

Reﬁ ll Indicator

Power Indicator

Ready Indicator

T5 PNK to Liquid

Level Probe

T4 WHI or RED to

Terminal Block

T3 BLK to Overﬂ ow

Safety Switch

T2 GRN or GRN/YEL

to Chassis Ground

T1 WHI/BLU to

Solenoid

J4 BLK & WHI to

Temperature Sensor

J5 GRY & GRY toTherm-

istor (H5X only)

BLU to Tank

Heater

WHI/VIO to

Terminal Block

42311 071310

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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Bunn DV User Manual Page 11

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