Bunn U3A service manual SERVICE cont TANK HEATERS, Left, Tank Heater Terminals

SERVICE (cont.)

TANK HEATERS

FIG. 26 TANK HEATER	P2209.60
Location:

The tank heaters are located on the right center and the left center of the component bracket.

Test Procedures:

1.Disconnect the brewer from the power source.

2.Disconnect the wires from the tank heater.

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

If continuity is present as described, proceed to #4. If continuity is not present as described, replace the tank heater.

Removal and Replacement:

1.Remove the wires or thermal fuses from the tank heater.

2.Remove the four #8-32 screws securing the tank heater to the component bracket.

3.Remove tank heater and gasket.

4.Position new tank heater and gasket on the compo- nent bracket and secure with four #8-32 screws.

5.Refer to Fig. 27 and reconnect the wires.

BLK to Contactor L1 (120/208V, 120/240 Three

Wire Single Phase, 208V

and 240V Two Wire, Single Phase)

BLU to Main Harness (208V, 240V, 380V Three Wire ,Three Phase and 380V,440V Four Wire, Three Phase

BLK (Thermal Fuse to Contactor Lower Left Terminal) (230V-CE Mod- els)

RED to Contactor T2 (All Models Except 230V-CE Models)

RED (Thermal Fuse) to Con- tactor Top Right Terminal) (230V-CE Models)

RED to Contactor L2 (120/208V, 120/240 Three Wire Single Phase, 208V and 240V Two Wire, Single Phase)

BLU to Main Harness (208V, 240V, 380V Three Wire ,Three Phase and 380V,440V Four Wire, Three Phase

RED (Thermal Fuse) to Contactor Lower Right Terminal)

BLK to Contactor T1 (All Models Except 230V-CE Models)

BLK (Thermal Fuse) to Contactor Top Left Termi- nal) (230V-CE Models)

LEFT		RIGHT
	FIG. 27 TANK HEATER TERMINALS	P1746

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