Bunn VPS - Manual (Page 13)

Page 13
SERVICE (cont.)
TANK HEATER (Cont.)
BLK to Limit Thermostat (120V Models)
Thermal Cut-off to Blu/BLK Lead From
Control Thermostat (220V Two Wire
Models)
WHI to WHI Lead on
Power Cord (120V Models)
Thermal Cut-off to Red
from Power Connector
(220V Two Wire Models)
P1254
FIG. 10 TANK HEATER TERMINALS
THERMAL CUT-OFF - VPRA, VPSA
BUNN OFF
HI
FIG. 11 THERMAL CUT-OFF P1270
Location:
The thermal cut-outs are located inside the hood
connected to the tank heater terminals.
Test Procedures:
1.
Disconnect the brewer from the power source.
2. Disconnect the thermal cut-off from the tank
heater and the red wire from the power connec-
tor.
3. Check for continuity across the thermal cut-off
terminals with an ohmmeter.
If continuity is present as described, the thermal cut-
off is operating properly.
If continuity is not present as described, replace the
thermal cut-off.
4. Disconnect the thermal cut-off from the tank
heater and blue/black from the control thermo-
stat.
5. Check for continuity across the thermal cut-off
terminals with an ohmmeter.
If continuity is present as decribed, the thermal cut-off
is operating properly.
If continuity is not present as described, replace the
thermal cut-off.
Removal and Replacement:
1.
Disconnect the thermal cut-off from the tank
heater and the red wire from the power connec-
tor or the blue/black wire from the control ther-
mostat.
2. Install new thermal cut-off.
3. Refer to Fig. 12 when reconnecting wires.
Thermal Cut-off from Tank
Heater to Red Lead from
Power Connector
Thermal Cut-off from Tank
Heater to BLU/BLK Lead
from Control Thermostat
VPRA - VPSA
FIG. 12 THERMAL CUT-OFF TERMINALS
P1269
10053 073001