Combustion Catalog | Fives North American

Adjustments | 4384 Fuel Directed

Typical Single Burner Fuel Directed Flow Control Schematic

Bulletin 4384 Page 4

Combustion Air

Air Control Valve

 P transmitter

8000 Series Electronic Ratio Controller

Flow Control

 P transmitter

Natural Gas from Fuel Train

Gas Control Valve

Jet Gas


manual flame length adjustments

4014 Gas Boosted Pilot (See Sheet 4014 and Dims. & Installation 4384 for pilot sizes.)

Pilot Air

L - long flame (forward gas) S - short flame (radial gas)

Pilot Gas


make the desired flame length adjustments. If high fire gas flow cannot be reached, open the (S) and (L) flame length ad- justment screws equally until the proper gas flow is obtained. Correct air/fuel ratio as required.

1. The flame length adjusters are located on the side of the gas inlet connection. Initially set both the short (S) and the long (L) flame adjustment screws equally open. (Fully close both adjusters by turning them clockwise, then open 2 turns.)

5. Drive the system to low fire. Set air/fuel ratio. If used, adjust jet gas valve to improve the low fire flame definition.

2. Establish pilot flame. See Sheet 4014 for instructions.

3. Establish main flame. If main flame cannot be established, open (S) and (L) flame adjustment screws equally until a flame is established.

6. Drive the system to high fire and verify flame length and air/ fuel ratio.

4. With an established flame, drive the system to high fire. Set air/fuel ratio. Using the (S) and (L) flame adjustment screws,

To order, specify: 4384-(code for pipe size)-(A, if applicable) / (LO for 2 psig model) Burner Complete (specify Arrangement Designators-see Dimensions & Installation 4384). Examples: 4384-10-A 10" Burner Complete with arrangement 3a1 4384-12/LO 12" Low Gas Pressure Burner Complete with arrangement 1c3

WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Components in combustion systems may exceed 160°F (71°C) surface temperatures and present hot surface contact hazard. Fives North American Combustion, Inc. suggests the use of combustion systems that are in compliance with all Safety Codes, Standards, Regulations and Directives; and care in operation.

CONTACT T +1 800 626 3477 - F +1 216 373 4237

Fives North American Combustion, Inc. 4455 East 71st Street - Cleveland, OH 44105 - USA

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