Bunn FMD-3 Benutzerhandbuch

20

FIG. 9 CONTROL THERMOSTAT

Location:

The control thermostat (mechanical or electronic)

is located inside the dispenser on the upper left side
of the housing.

Test Procedure:

Mechanical Thermostat:
1. Disconnect the dispenser from the power source.
2. Disconnect the black wire of the control thermo-

stat from the black lead from the limit thermostat.

3. Remove bulb from the tank.
4. With a voltmeter, check the voltage across black

wire on the control thermostat and the white or
red wire on the tank heater with the tank heater
switch in the “ON” (lower) position. Connect the
dispenser to the power source. The indication
must be:
a) 120 volts ac for two wire 120 volt models.
b) 208 volts ac for three wire 120/208 volt mod-
els.
c) 240 volts ac for two wire 240 volt models and
three wire 120/240 volt models.

5. Disconnect the dispenser from the power source.

If voltage is present as described the control thermo-
stat is operating properly. Reinstall bulb into the tank.
If voltage is not present as described, replace the
thermostat.