Ballast - Bunn HC-2 HC-3 Operating & Service Manual

SERVICE (cont.)

BALLAST

FIG. 4 BALLAST
Location
The front door lamp ballast is located on the
front center of the base behind the front panel.
Test Procedure
1. Disconnect the dispenser from the power source.
2. Disconnect the two terminal plug of the door in-
terconnect harness from the connector of the
ballast.
3. Check the voltage across the white wire and the
blue wire terminal of the ballast with a voltmeter.
Connect the dispenser to power source. The in-
dication must be:
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt
models or 120/240 volts models.
c) 240 volts ac for two wire 240 volt models.
If voltage is present as described the ballast is oper-
ating properly.
If voltage is not present as described, replace the
ballast.
Removal and Replacement
1. Disconnect the wires from the ballast.
2. Remove the two #8-32 keps nuts securing the
ballast to the dispenser base.
3. Remove and discard ballast.
4. Install new ballast over the two weld studs on
the dispenser base and secure with two #8-32
keps nuts.
5. Refer to the illustration below when reconnect-
ing the wires.
WHI to Main
Wiring Harness
WHI & BLU to
Door
Interconnect
Harness
120V, 120/208V, & 120/240V Models
P1199.40
RED & BLU to
Door
Interconnect
Harness
15
BLK to Terminal Block
WHI to Main
Wiring Harness
BLK to Terminal Block
240V Models
FIG. 5 BALLAST TERMINALS
P1202.45
27591 031597