Bunn STA, STFA, SA service manual SERVICE cont TANK HEATER Cont

Page 21
SERVICE (cont.)

SERVICE (cont.)

TANK HEATER (Cont.)

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

9.Remove the three #8-32 nuts and holddown brackets securing the tank lid to the tank.

10.Remove the tank lid with level probe.

11.Remove the switch panel and disconnect the leads to the tank "Keep Warm" heater.

12.On 100 volt models equipped with rear drain, open the shut-off valve and drain water from the tank. Disconnect drain tube and fittings from tank.

13.Direct the pink probe wire, capillary tube and top warmer wiring harness through the nylon bush- ing located on the rear of the basin flange.

14.Lift tank and fill basin assembly from housing and drain water from tank.

15.Remove the two hex nuts securing the tank heater to the bottom of tank. Remove tank heater with gaskets and discard.

16.Install new tank heater with gaskets to the tank and secure with two hex nuts.

17.Install tank with limit thermostat, sprayhead tube and tank heater.

18.Reconnect the inlet and outlet water lines to the solenoid and faucet.

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

20.Install sprayhead.

21.Reconnect the wires to the limit thermostat and control thermostat. See limit thermostat and control thermostat sections in this manual when reconnecting wires.

22.Install tank lid with holddown brackets and #8-32 nuts

23.Install the thermostat capillary bulb as described in section for control thermostat.

24.Reconnect the wire to the liquid level probe.

25.Refer to FIG. 13 when reconnecting the tank heater wires.

WHI or RED Wire

From Tank Heater

BLK Wire to Limit

Thermostat

P1593

FIG. 13 TANK HEATER TERMINALS

Page 21

29251 052500

 

Image 21
Contents FAX POST OFFICE BOX SPRINGFIELD, ILLINOISBUNN S,SA ST,STA STF,STFAUSER NOTICES WARRANTY#00656.0000 USER NOTICES Continued#00882.0000 #02763.0000 #02765.0000 #02769.0000PLUMBING REQUIREMENTS ELECTRICAL REQUIREMENTSElectrical Hook-Up Models S & SA4A. Models S & SA INITIAL SET-UP4B. Models ST, STA 4C. Models STF & STFAModels ST, STF, STA & STFA ON/OFF SWITCH CLEANINGSTART SWITCH OPERATING CONTROLSTROUBLESHOOTING PROBLEM TROUBLESHOOTING contPROBABLE CAUSE REMEDYTROUBLESHOOTING cont PROBLEM Dripping from sprayhead Beverage overflows dispenser cont Weak beverage Brewer is making unusal noises SERVICE COMPONENT ACCESSContents CONTROL THERMOSTAT SERVICE contSERVICE cont CONTROL THERMOSTAT cont SERVICE cont LIMIT THERMOSTAT ON/OFF SWITCH Models ST, STA, STF & STFA FIG. 8 SOLENOID START SWITCH Models ST, STA, STF & STFA SERVICE cont TANK HEATER SERVICE cont TANK HEATER Cont FIG. 14 BREW TIMER SERVICE cont BREW TIMER Early Modelscont FIG. 16 DIGITAL BREW TIMER DIGITAL BREW TIMER Late ModelsSERVICE cont DIGITAL BREW TIMER Late Modelscont LIQUID LEVEL CONTROL BOARD Models STF & STFA STFACont SERVICE cont TIMER RELAY Models STF & STFA SERVICE cont WARMER ELEMENTS SERVICE cont THERMAL CUT-OFFModels SA, STA & STFA 29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page29251 Page