Bunn T3A, T6A manual Tank Heater, SERVICE cont, Disconnect the black wire and the white or red

SERVICE (cont.)		Removal and Replacement:
TANK HEATER
		1.	Disconnect the black wire and the white or red
			wire from the tank heater terminals.
		2.	Remove sprayhead and the hex nut securing the
			sprayhead tube to the hood. Set aside for reas-
			sembly.
		3.	Disconnect vent tube.
		4.	Remove the six #10 thread cutting screws secur-
			ing the tank lid to the tank.
		5.	Remove the tank lid with limit thermostat, spray-
			head tube, tank heater and vent tube.
		6.	Remove the two hex nuts securing the tank heater
			to the tank lid. Remove tank heater with gaskets
			and discard.
		7.	Install new tank heater with gaskets on the tank
FIG. 19 TANK HEATER	P1833		lid and secure with two hex nuts.
		8.	Install tank lid with limit thermostat, sprayhead
Location:
			tube, tank heater and vent tube using six #10
The tank heater is located inside the tank and se-
			thread cutting screws.
cured to the tank lid.
		9.	Secure sprayhead tube to hood using a hex nut.
Test Procedures:		10.	Install sprayhead.
		11.	Connect vent tube to fitting.
1. Disconnect the brewer from the power supply.
		12.	Reconnect the wires to the limit thermostat, tank
2. With a voltmeter, check the voltage across the
			heater. See limit thermostat section in this manual
black and white wires on 100 volt and 120 volt
			when reconnecting wires.
models or the black and red wires for 240 volt
		13. Refer to Fig. 20 when reconnecting the tank heater
models. Connect the brewer to the power source.
			wires.
The indication must be:
		BLK to Control
a) 120 volts ac for two wire 120 volt models .				WHI to Power Cord
b) 240 volts ac for two wire 240 volt models.		Thermostat		(100v & 120V Models)
c) 100 volts ac for two wire 100 volt models.				RED to Power Connector
3. Disconnect the brewer from the power source.				(240V Models)

If voltage is present as described, proceed to #4

If voltage is not present as described, refer to the

Wiring Diagrams and check wiring harness.

4.Disconnect the black wire and the white wire or red 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, re-			P1284
move and inspect heater for cracks in the sheath.	FIG. 20 TANK HEATER TERMINALS
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