Bradford-White Corp M2C504T, CX), M1XR403S*FCX, MI50L, MI504S, MI60T, MI40T, MI404T, MI30T Feedline

SERVICE PROCEDURE RG-VI

Burner Operation Inspection, Adjustment

Cleaning and Replacement

MAIN BURNER: Inspection, Adjustment,

Cleaning and Replacement (cont.)

Step 3. Fully inspect inner gasket per SERVICE PROCEDURE RG-I, step 4. Replace gasket if required following SERVICE PROCEDURE I, steps 5 & 6.

Step 4. Be certain that thermocouple, pilot tube and piezo wire are routed by inner door flange as shown and Reinstall inner door per SERVICE PROCEDURE RG-I, step 10 and 11.

Position thermocouple, pilot tube and Piezo wire.

Step 5. Observe burner operation through sight glass of inner door. Burner should operate as adjusted in step 2, if not, repeat procedure compensating air shutter position for proper burner operation with inner door in place.

Step 6. It may be necessary to clean main burner or main burner orifice to achieve proper burner operation. If cleaning is required proceed to burner cleaning section in this procedure.

BURNER CLEANING (Steel & Cast Iron)

Step 1. Remove inner door assembly per SERVICE PROCEDURE RG-I, steps 1 through 3c.

Step 2. Disconnect main burner feed line (¾ wrench), pilot tube (7/16 wrench) and thermocouple (3/8) wrench from combination thermostat gas valve and remove burner assembly from combustion chamber.

NOTE: Feedline nut for natural gas control uses right hand threads,

LP control uses left hand thread.

Step 3. Thoroughly inspect burner surface area and burner ports and remove any loose debris accumulation.

Burner Surface Area

Burner Port Area

Step 4. On cast iron burners, inspect

Burner Venturi

for any debris build up insideOpening burner venturi. If found,

disconnect feedline from burner and remove debris build up.

Feedline

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