Bunn VP17 manual Tank Heater

SERVICE (cont.)

TANK HEATER

P1161.40

FIG. 8 TANK HEATER

Location:

The tank heater is located inside the tank and secured to the tank lid.

Test Procedures:

1.Disconnect the brewer from the power supply.

2.With a voltmeter, check the voltage across the black and white wires on the tank heater. Connect the brewer to the power source. The indication must be:

a)100 volts ac for two wire 100 volt models.

b)120 volts ac for two wire 120 volt models.

3.Disconnect the brewer from the power source.

2.Disconnect the black wire on the limit thermostat from the tank heater switch and disconnect the blue wire from the limit thermostat to the control thermostat.

3.Disconnect the black wire and the white wire from the tank heater terminals.

4.Remove sprayhead and the hex nut securing the sprayhead tube to the hood. Set aside for reas- sembly.

5.Remove the eight #8-32 nuts securing the tank lid to the tank.

6.Remove the tank lid with limit thermostat, spray- head tube and tank heater

7Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets

and discard.

8.Install new tank heater with gaskets on the tank lid and secure with two hex nuts.

9.Install tank lid with limit thermostat, sprayhead tube and tank heater using eight #8-32 hex nut.

10.Secure spayhead tube to hood using a hex nut.

11.Install sprayhead.

12.Reconnect the wires to the limit thermostat, tank heater and control thermostat. See Limit Ther- mostat and Control Thermostat sections in this manual when reconnecting wires.

13.Install fill basin, secure with tank inlet fitting and gasket.

14.Refer to Fig. 9 when reconnecting the tank heater wires.

If voltage is present as described, proceed to #4

If voltage is not present as described, refer to the Wir- ing Diagrams and check wiring harness.

4.Disconnect the black wire and the white wire from the tank heater terminals.

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

If continuity is present as described, reconnect the wires, the tank heater is operating properly.

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

NOTE- If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.

Removal and Replacement:

1.Remove the tank inlet fitting securing the fill basin to the tank lid, remove fill basin and tank inlet gasket. Set all three parts aside for reassembly. Page 7

WHI to WHI Lead on
Power Cord (120V	BLK to Control
Models)
	Thermostat
WHI to Terminal Block
(White Insert) (100 V
Models)

FIG. 9 TANK HEATER TERMINALS		P1163
			052512
	46721