Bradford White MI30T Service Manual page 18

Step 7. Removal of gas valve.
a) Disconnect main burner feedline, pilot tube and thermocouple
from gas valve & remove burner from combustion chamber.
NOTE: Feed line nut for natural gas control uses right hand threads,
b) Remove piezo bracket with piezo igniter (refer to SERVICE PROCEDURE RG-IV) from gas valve.
c) Remove gas valve from water heater,
rotating counter clockwise using a control body wrench or a
length of ½" NPT pipe threaded into inlet of control.
Step 8. Installation of gas valve.
a) Install new gas valve using a control body wrench or a length of ½" NPT
pipe threaded into inlet of control. DO NOT OVER TIGHTEN. Use caution not to damage cast
aluminum body of gas valve. Be certain not to damage the bundled wire leads.
Note: Gas valve must be installed in proper upright position to
b) Reattach Piezo bracket with Piezo igniter to gas valve.
c) Reattach main burner feedline, pilot tube and thermocouple to gas valve.
NOTE: Feedline nut for natural gas control uses right hand threads,
d) Gather wire leads of gas valve and Piezo igniter and secure along side of
feedline using new wire tie provided.
e) Connect gas supply piping to inlet of control. Use back up wrench on wrench boss of control, never
use back up wrench on body of control.
Step 9. Reinstallation of inner door assembly.
a) Prior to reinstallation of inner door, fully inspect inner door gasket for the following:
> Tears
> Missing Material
> Cracks
> Dirt or debris
If the gasket is not effected by any of the above, gasket replacement will not be required. If replacement is
required, replace using new gasket kit following the instructions provided with kit.
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LP control uses left hand thread.
To remove or install control, insert
only ½" NPT threaded pipe into inlet
and use to loosen or tighten control.
assure the feedline will align properly at the inner door flange.
DO NOT OVER TIGHTEN. If control is turned past proper alignment, do not
reverse direction to align.
LP control uses left hand thread.
> Gasket Adhesion to inner door
> Other imperfections that will inhibit proper seal
> Material left on combustion chamber
SERVICE PROCEDURE RG-V
Gas Valve
Testing and Replacement (White Rodgers/Robertshaw)
18
Wrench Boss