Bunn U3 服务手册

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页码 41
Page 16
RED to Left Tank
Heater (T)
RED to Terminal
Block(L)
BLK Thermal 
Fuse to Left 
Tank Heater
BLK to left 
Tank Heater
(L1)
 
BLK to Right Tank
Heater (T1)
BLK to Terminal
Block (L1)
RED to Right 
Tank Heater
 (L)
WHI from Main Harness
(10/08V,10/40V,380V 
Three Wire Models, 380V and
440V Four Wire Models)
RED from Main Harness
(08V, 40V Two Wire Models
and 08, 40V Three Wire 
Models)
RED to Limit 
Thermostat
RED Thermal Fuse 
to Left Tank Heater
RED to Terminal 
Block (L)
BLK to Terminal 
Block (L)
RED Thermal Fuse
to Right Tank 
Heater
BLK Thermal Fuse 
to Right Tank Heater
BLK to Terminal 
Block (L1)
10/08V, 10/40V, 08V, 
40V, 380V 440V MODELS
30V - CE Models
P175
FIG.5 CONTACTOR TERMINALS
SERVICE (cont.)
CONTACTOR (cont.)
9.  Check for continuity across the terminals on the 
left side of the contactor by manually closing the 
contacts. Continuity must not present when the 
contact is released.
10. Check for continuity across the terminals on the 
right side of the contactor by manually closing the 
contacts.Continuity must not be present when the 
contact is released.
If continuity is present as described, the contactor is 
operating properly.
If continuity is not present as described, replace the 
contactor.
Removal and Replacement:
1.  Disconnect all the wires from the contactor.
.  Remove the two #8-3 screws securing the con-
tactor to the contactor mounting bracket, remove 
contactor and protective shield. Discard contac-
tor.
3.  Install new contactor with shield between mounting 
bracket and contactor and secure with two #8-3 
screws
4.  Refer to Fig. 5 and reconnect the wires.
BLK to Limit
Thermostat
10060  080900