Bunn C - Manual (Page 20)

Page 20
Location:
The thermal cut-off (TCO) is a thermal fuse located
above the tank lid, connected to the tank heater.
NOTE: Installed only on tanks with coil faucet.
CE models have an additional TCO connected to the
other heater terminal.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect both ends of the TCO.
3. Check for continuity across TCO with an ohm-
meter.
If continuity is present as described, the TCO is op-
erating properly.
If continuity is not present as described, replace the
TCO.
THERMAL CUT-OFF (Brewers W/Faucet)
Fig. 20-1 THERMAL CUT-OFF
FIG. 20-3 TCO TERMINALS
SERVICE (cont.)
Removal and Replacement:
1. Disconnect both ends of the TCO.
2. Install new thermal cut-off.
3. Refer to Fig. 17 when reconnecting wires.
Thermal Cut-Off from Tank
Heater to BLK Lead from
Control Thermostat
WHI or RED to
Terminal Block
FIG. 20-4 TCO TERMINALS
Thermal Cut-Off from Tank
Heater to BLK Lead from
Control Thermostat
RED to
Heater Switch
120V, 120/240V
230V CE
FIG. 20-2 TESTING TCO
41711.1 052009