Bradford-White Corp MI30T*F

The following test should be performed while the pilot f lame is on.

Step 1. Turn knob to pilot position and depress.

Step 2. Continue press ing knob and remove red (+) wire from resettable thermal door switch.

Step 3. Using a multim eter capable of measur ing millivolts, connect the positive side of th e multimeter to the

terminal of the resettable thermal door switch. Connect the negative side of the multimeter to any earth

ground location (jacket base, screw, etc.).

OPEN CIRCUIT THERMOPILE TESTING (Honeywell Gas Control)

Normal thermopileoperation will be between 350mV - 850mV. If reading is less than 350mV, replacement of pilot

assembly is recommended following SERVICE PROCEDURE RG-III .

Step 4. If thermop ile reading is between 35 0mV - 850mV, remove mult imeter and reconnect r ed wire to positive (+)

terminal of Gas Control.

Step5. Release Gas Control knob and turn to desired setting to resume normal operation.

SERVICE PROCEDURE RG-II

Thermocouple/Thermopile Testing and

Replacement

Resettable Thermal Door

Switch Terminal(+)

Jacket BaseScrew (-)