Bunn FMD-3 service manual Main Wiring Thermostat Harness, Tank Heater Switch

Page 33

SERVICE (cont.)

TANK HEATER (cont.)

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.Shut-off water supply to the dispenser.

2.Disconnect the water supply tube on the tank lid.

3.Disconnect the black wires on the limit thermo- stat.

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

5.Disconnect the pink wire from the liquid level probe.

6.Disconnect the green wire from the tank.

7.Remove the thermostat capillary bulb by firmly pulling-up on the capillary at the tank lid. This will disengage the grommet from the tank lid.

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

9.Remove tank lid with limit thermostat, liquid level probe and tank heater as an assembly.

10.Remove the two hex nuts securing the tank heater to the tank lid. Remove tank heater with gaskets and discard.

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

12.Install tank lid with limit thermostat, liquid level probe and tank heater on the tank and secure with ten #8-32 hex nuts.

13.Connect water inlet line to the tank lid.

14.Reconnect the black wires to limit thermostat, the pink wire to the liquid level probe and the green wire to the tank. Refer to the limit thermostat and the liquid level board and probe sections in this manual when reconnecting wires.

15.Refer to Fig. 33 when reconnecting the wires to the tank heater.

WHI or RED to

BLK to Limit

Main Wiring

Thermostat

Harness

 

FIG. 33 TANK HEATER TERMINALS

P1218

 

TANK HEATER SWITCH

FIG. 34 TANK HEATER SWITCH

P1452.40

 

Location:

 

The tank heater switch located inside the dis- penser on the upper right of the whipper motor mount- ing panel.

33

28364 011598

 

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Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisFMD-2 FMD-3 BUNN-O-MATIC Commercial Product Warranty28368.0000 00656.0000 00831.000026536.0002 FMD-2Initial SET-UP Plumbing HOOK-UP Initial Fill & HeatDraining the HOT Water Tank Remedy Problem Probable CauseTroubleshooting Replacement Control thermostatStat for testing procedures. See Dripping from dispense tip Lime build-up Product overflows container Dispense switchLeaks ColdProbable Cause Remedy ProblemDispenser is making unusual Refer to Service Lamp, see page 23 for lamp replacementNoises Water Supply Tank Heater Excess dust Fan Display not lit Lamp Lamp Holder Starter Lamp BallastComponent Access ContentsAuger Drive Components If voltage is present as described, proceed to #5 Hopper Lid Auger Wire Agitator Disc AssyOff of the auger drive shaft Auger Drive Shaft Optional Bushing Ejector ElbowRemove dust seal 18 from auger motor Auger Drive ComponentsRefer to when reconnecting the wires BallastHarness BLK to BLU From Door Interconnect Control Thermostat Remove temperature probe from the tankDispense Switch Control ThermostatLocation Dispense Switch FANLocation Frother and Whipper Motor FANSteam Collector Ring Mixing Chamber #8-32 Acorn Nut Washer Ring Nut FrotherFrother and Whipper Motor Whipper Motor Terminals P1451.40 Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalLamp Holder Lamp Replacement Refer to FigDoor Assy Upper Panel Lamp Holders Lower Panel Remove the outside window and display graphicAs assembly Lamp Starter and SocketLevel Control Board and Level Probe Level Control Board and Level Probe Limit Thermostat Limit ThermostatOverflow Protection Switch From Main HarnessBoard RINSE/RUN Switch Rinse /RUN SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsSolenoid Valve Inlet Solenoid Valves DispenseTank Heater Solenoid Valve InletMain Wiring Thermostat Harness Tank Heater SwitchTank Heater Tank Heater Switch Terminals Tank Heater SwitchSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3
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