Bunn CWT-TS ユーザーズマニュアル
Page 20
SERVICE (cont.)
TANK HEATER (Cont.)
If voltage is present as described, proceed to #4
If voltage is not present as described, refer to the
Wiring Diagrams and check wiring harness.
If voltage is not present as described, refer to the
Wiring Diagrams and check wiring harness.
4.
Disconnect the black wire and the white wire or
red wire from the tank heater terminals.
red wire from the tank heater terminals.
5.
Check for continuity across the tank heater termi-
nals.
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.
wires, the tank heater is operating properly.
If continuity is not present as described, replace the
tank heater.
NOTE- If the tank heater remains unable to heat,
remove and inspect heater for cracks in the sheath.
remove and inspect heater for cracks in the sheath.
Removal and Replacement:
1.
1.
Disconnect the water supply tube from the fill
basin.
basin.
2.
Remove the tank inlet fitting securing the fill
basin to the tank lid, remove fill basin and tank
inlet gasket. Set all three parts aside for reassem-
bly.
basin to the tank lid, remove fill basin and tank
inlet gasket. Set all three parts aside for reassem-
bly.
3.
On brewers with faucet shut-off water supply to
the brewer and disconnect the inlet and outlet
water lines to the faucet coil assembly.
the brewer and disconnect the inlet and outlet
water lines to the faucet coil assembly.
4.
Disconnect the black wire on the limit thermostat
from the tank heater switch. On late model brew-
ers also disconnect the blue wire from the limit
thermostat to the control thermostat.
from the tank heater switch. On late model brew-
ers also disconnect the blue wire from the limit
thermostat to the control thermostat.
5.
Disconnect the black wire and the white or red
wire from the tank heater terminals.
wire from the tank heater terminals.
6.
Remove sprayhead and the hex nut securing the
sprayhead tube to the hood. Set aside for reas-
sembly.
sprayhead tube to the hood. Set aside for reas-
sembly.
7.
Remove the eight #8-32 nuts securing the tank
lid to the tank.
lid to the tank.
8.
Remove the tank lid with limit thermostat,
sprayhead tube, tank heater, coil assembly and
control thermostat w/bracket (early models only).
sprayhead tube, tank heater, coil assembly and
control thermostat w/bracket (early models only).
9
Remove the two hex nuts securing the tank
heater to the tank lid. Remove tank heater with
gaskets and discard.
heater to the tank lid. Remove tank heater with
gaskets and discard.
10. Install new tank heater with gaskets on the tank
lid and secure with two hex nuts.
11. Install tank lid with limit thermostat, sprayhead
tube, tank heater, coil assembly (brewers with
faucet) and control thermostat with bracket (early
brewers only) using eight #8-32 hex nut.
faucet) and control thermostat with bracket (early
brewers only) using eight #8-32 hex nut.
12. Reconnect the inlet and outlet water lines to the
faucet coil assembly.
13. Secure spayhead tube to hood using a hex nut.
14. Install sprayhead.
15. Reconnect the wires to the limit thermostat, tank
14. Install sprayhead.
15. Reconnect the wires to the limit thermostat, tank
heater and control thermostat. See limit thermo-
stat and control thermostat sections in this manual
when reconnecting wires.
stat and control thermostat sections in this manual
when reconnecting wires.
16. Install fill basin, secure with tank inlet fitting and
gasket. Insert water supply line through grom-
met in fill basin.
met in fill basin.
17. Refer to the illustration below when reconnecting
the tank heater wires.
BLK to Control Thermostat
(Brewers W/Out Faucet)
BLK to Fuse (Brewers W/Faucet)
(Brewers W/Out Faucet)
BLK to Fuse (Brewers W/Faucet)
WHI to Terminal Block
(White Insert on 120V
Two Wire Models)
Red to Terminal Block
(Red Insert on 120/240V
Three Wire Models)
(White Insert on 120V
Two Wire Models)
Red to Terminal Block
(Red Insert on 120/240V
Three Wire Models)
P1134CAN