Bunn H5E, H5X, DV manual SERVICE cont Tank Heater, BLU to Control, Board Relay, Thermostat

SERVICE (cont.)

Tank Heater

Location:

The tank heater is located in the tank lid.

H 5

P4093

FIG. 16a TANK HEATER

H 10

P1993

FIG. 16b TANK HEATER

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Check the voltage across the terminals of the tank heater 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 or

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

c.) 230 volts ac for 230 volt models.

3.Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #4.

If voltage is not present as described, replace the tank heater.

4.Remove the tank heater from the tank lid and in- spect it for cracks in the sheath.

If the sheath shows no sign of damage, proceed to #5. If the sheath is damaged, replace the tank heater.

5.Check for continuity across the tank heater termi- nals.

If continuity is present as described, reinstall the tank heater. The tank heater is operating properly.

If continuity is not present as described, replace the tank heater.

Removal and Replacement:

1.Remove the wires to the tank heater.

2.Remove the 8-32 nuts from the tank heater flange.

3.Remove the tank heater.

4.Inspect the tank heater gasket and replace if neces- sary.

5.Securely install the new tank heater. Be certain of a watertight seal.

6.Reconnect the wires, FIG. 10.

BLU to Control	BLK to Limit
Board Relay	Thermostat

P1780

FIG. 16c TANK HEATER WIRING

HEATER	RESISTANCE
1800W-120V	07.44	- 08.67
4000W-240V	13.43	- 15.51
4000W-208V	10.09	- 11.99
6000W-240V	08.85	- 10.23
6000W-208V	06.67	- 07.70

TERMINAL TO SHEATH - INFINITE (OPEN)

16 42311 071310