Bradford White EF Series Service Manual page 15

Thermostat Board Replacement Procedure
Thermostat Board Replacement Procedure
Step 1. Position main power switch to "OFF"
Step 1. Position main power switch to "OFF"
Step 2. Disconnect (unplug) water heater from 120
Step 2. Disconnect (unplug) water heater from 120
volt power source.
volt power source.
Step 3. Un-latch and remove top surround cover
Step 3. Un-latch and remove top surround cover
from top of heater.
from top of heater.
Step 4. Locate thermostat board on control panel.
Step 4. Locate thermostat board on control panel.
(see photo 7)
(see photo 7)
Step 5. Carefully disconnect all wires from thermostat
Step 5. Carefully disconnect all wires from thermostat
board.
board.
Note: it may be necessary to identify
Note: it may be necessary to identify wires
wires
for proper re-connection.
for proper re-connection.
Step 6. Remove the two screws (Phillips head screw
Step 6. Remove the two screws (Phillips head screw
driver) that secure thermostat board to
driver) that secure thermostat board to
control panel.
control panel.
Step 7. Install new thermostat board to control panel
Step 7. Install new thermostat board to control panel
using screws from step 6.
using screws from step 6.
Step 8. Carefully reconnect wiring per the wire
Step 8. Carefully reconnect wiring per the wire
diagram below. Reconfirm wire
diagram below. Reconfirm wire
connections are correct prior to putting
connections are correct prior to putting
heater back in service
heater back in service
Step 9. Restore 120 volt power supply to water
Step 9. Restore 120 volt power supply to water
heater and confirm proper operation following
heater and confirm proper operation following
the lighting instructions on the lighting
the lighting instructions on the lighting
instruction label or the lighting instruction
instruction label or the lighting instruction
located in the installation and operating
located in the installation and operating
instruction manual.
instruction manual.
Step 10. Replace surround cover on top of heater.
Step 10. Replace surround cover on top of heater.
SERVICE PROCEDURE EF-I
SERVICE PROCEDURE EF-I
Thermostat Circuit Testing and Replacement
Thermostat Circuit Testing and Replacement
Thermostat
Thermostat
Board
Board
WARNING
WARNING
120 volt potential exposure. Isolate the
120 volt potential exposure. Isolate the
appliance and reconfirm power is
appliance and reconfirm power is
disconnected using a multi-meter.
disconnected using a multi-meter.
Mounting
Mounting
screw locations
screw locations
WIRING DIAGRAM
WIRING DIAGRAM
7
7
Page 15
Page 15
Page 15