Parts List & Instructions 4762-1 Page 2
Immersion Tube
Immersion Tube
ORIFICE PLATE INSTRUCTIONS
Fig. 1. 4762-4 Burner, looking into main air inlet with orifice plate positioned for no spin. All 4762 Burners are furnished with orifice plates in their main air connections. These plates are factory-set in the positions shown below to ensure smooth, trouble-free operation of the burners. It should not be necessary to alter orifice plate positions in the field. Circular orifice plates with "D" shaped openings are furnished with 4762-4 and -6 Burners.
Edge of plate handle against bolt
Orifice plate in full spin position
Orifice plate in no spin position
Edge of plate handle against bolt
Fig. 2. 4762-6 Burner, looking into main air inlet with orifice plate positioned for full spin.
Gas inlet
Gas inlet
Fig. 1. 4762-4
Fig. 2. 4762-6
Primary air adjustment as shipped (Dim. "N", Bulletin 4762) will give best operation on most installations. In rare cases, adjustment may be required to smooth out operation. Common causes of rough operation are (1) leakagebetween the burner mounting flange and tube flange, and (2) careless trimming of the mounting gasket ID so that it extends inside the burner opening.
4762-7-A, -7-B, AND -8 GAS BURNERS
¾ " Pipe Plug
ASSEMBLE WITH TAPPED HOLES IN DISC IN LINE WITH PILOT HOLE IN BODY AS SHOWN
Obs. Port (8790-0)
Air Deflector Plate
Gas Tube Assembly
Hex Head Bolt
¾ " Pipe Tap Connections for Pilot and Flame Rod
Lockwasher
Mounting Gasket †
Factory Setting (See Bulletin 4762)
Body Air Inlet Gasket
¼ " Pipe Plug
Body
Orifice Plate
Air Adjustment
Air Inlet Adapter Gasket
Main Air Inlet Adapter
Hex Jam Nut
Air Inlet Gasket
Main Air Inlet Flange
Burner designation
Part Name
4762-7-A
4762-7-B
4762-8
Air Adjustment
OA4-0663-1 OA4-1489-1 OA4-0662-1
OA4-0663-1 OA4-1489-1 OA4-0662-1
OA4-0663-1 OA4-1489-1 OA4-0662-1
Air Deflector Plate
Air Inlet Adapter Gasket
Air Inlet Gasket
4-5371-3
4-5371-3
4-5371-3
Body
OC4-0658-1 OA4-0660-1 OA4-0781-1 R066-2300-S R510-2420-JC R970-3220-S OC4-0659-1
OC4-0658-1 OA4-0660-1 OA4-0781-1 R066-2300-S R510-2420-JC R970-3220-S OC4-0659-1
OC4-0658-1 OA4-0660-1 OA4-0781-1 R066-2300-S R510-2420-JC R970-3220-S OC4-0659-1 8765-8 x 7-D OA4-2414-3 OA4-0676-1
Body Air Inlet Gasket Gas Tube Assembly Hex Head Bolt (2 req’d)
Hex Jam Nut
Lockwasher (2 req’d) Main Air Inlet Adapter Main Air Inlet Flange
4-1695-5
4-1695-5
†
Mounting Gasket
OA4-2414-3 OA4-0674-1
OA4-2414-3 OA4-0675-1
Orifice Plate
† Optional
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