Bradford White M1TW40S Series Service Manual page 27

Gas Control Assembly to Thermal Well
Step 1. Install threaded end of thermal well into tank. Be sure
thermal well flange is positioned as shown in photo 24
for proper control alignment.
Step 2. Route wire leads back into relief opening.
(see photo 24)
Step 3. Align slots located on thermal well flange with tabs
located on back of gas control (see photos 24 & 25)
Step 4. Carefully push control back onto thermal well flange
as far as possible towards water heater. Slide control
down to lock into position.
Step 5. Install burner and connect pilot and feedline to gas
control.
Igniter/sensor
Igniter/sensor
connection
connection
Ground Wire
Ground Wire
connection
connection
blower harness connection
blower harness connection
5 pin
5 pin
3 pin
3 pin
thermal well connection
thermal well connection
Flammable Vapor
Flammable Vapor
Sensor
Sensor
TTW SERVICE PROCEDURE VI
Gas Control & Thermal Well Testing
and Replacement
24
Thermal well
flange slots
25
Gas control Tabs
Step 6. Reconnect wire harnesses to gas control
per the illustration.
Step 7. Reconnect gas piping to gas control.
Restore gas supply and check for gas
leaks.
Step 8. To resume operation, follow the
instruction located on the lighting
instruction label or the lighting instruction
located in the installation and operation
manual.
Route wires
through relief
opening
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