Bunn FMD-1 User Guide

37

J1

FIG. 40 TANK HEATER

Location:
 

The tank heater is located inside the tank and 

secured to the tank lid.

Test Procedure:

1.  Disconnect the dispenser from the power source.

2.  Check the voltage across the black and white wires 

120 volt or 230 volt models or black and red wires 

for 120/208 volt  models or 120/240 volt models 

with a voltmeter. Connect the dispenser to the power 

source. The indication must be:

 

a) 120 volts ac for two wire 120 volt models,

 

b)  120  volts  ac  for  three  wire  120/208  volt  or 

120/240 volt models,

 

c) 230 volts ac for two wire 230 volt models, after 

a delay of approximately 5 seconds.

3.  Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the dis-

penser wiring diagram and check the wiring harness.

4.  Disconnect the black wire and the white 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.

P1665

P1217

FIG. 39 INLET SOLENOID VALVE TERMINALS

WHI from Main Harness

7.  Disconnect the dispenser from the power source.

If the sound is heard as described and water will not 

pass through the solenoid valve, there may be a block-

age in the water line before the solenoid valve or, the 

solenoid valve may require inspection for wear, and 

removal of waterborne particles.

If  the  sound  is  not  heard  as  described,  replace  the 

solenoid valve.

Removal and Replacement:

1.  Remove the white and violet wires from the solenoid 

valve.

2.  Turn-off the water supply to the dispenser.

3.  Disconnect the water lines to and from the solenoid 

valve.

4.  Remove the two #8-32 screws securing the sole-

noid to the rear of the dispenser housing. Remove 

solenoid. 

5.  Remove the two #8-32 U-Type fasteners from the 

solenoid bracket.

6.  Install the two #8-32 U-Type fasteners and the two 

#8-32 screws on the new solenoid.

7.  Install new solenoid on rear of dispenser housing 

and tighten the two screws

8.  Securely  fasten  the  water  lines  to  and  from  the 

solenoid valve.

9.Refer to Fig. 39 and reconnect the wires.

VIO from Main Harness

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