Burner Adjustments

(QUALIFIED TECHNICIANS ONLY)

Flame Appearance and sooting

Proper flame appearance is a flame which is blue at the base and becomes yellowish-orange in the body of the flame. When the appliance is first lit, the entire flame may be blue and will gradually turn yellowish-orange during the first

15minutes of operation. If after a short period the flame stays lowered blue, or if the flame is orange with evidence of sooting (black tip), the air shutter opening may need to be adjusted.

If the air shutter openings closed too far, sooting may develop. Sooting is indicated by black puffs developing at the tips of very long orange flames. Sooting results in black deposits forming on the logs, appliance inside surfaces and on exterior surfaces adjacent to the vent termination. Soot- ing is caused by incomplete combustion in the flames and lack of combustion air entering the air shutter opening. To achieve a warm yellow- ish-orange flame with an orange body that does not soot, the shutter opening must be adjusted between these two extremes.

Air Shutter Adjustment Guidelines

• If there is smoke or soot present, first check

the log set positioning to ensure that the

flames are not impinging on any of the logs.

If the log set is properly positioned and a

sooting condition still exists, then the air

shutter opening should be increased.

• The more offsets in the vent system, the larger

the air shutter opening will need to be.

• An appliance operated with the air shutter

opened too far, may have flames that appear

blue and transparent. These weak, blue and

Figure 10 - Burner Flame Appearance Model LMDV-3328 & LMDV-3530

Figure 11 - Burner Flame Appearance Model LMDV-4035

transparent flames are termed anemic.

• Propane models may exhibit flames which

candle or appear stringy. If this is present

and persists, adjust the air shutter to a more

open position, then operate the appliance for

a few more minutes to ensure that the flame

normalizes and the flames do not appear

sooty.

The following chart is provided to aid you in achieving the correct air shutter adjustment for your installation.

Air Shutter Adjustment Guidelines:

Amount of	Flame	Air Shutter
Primary Air	Color	Adjustment

If air shutter is	Flame will	Air shutter
closed too far	be orange	gap should be
		increased
		increased
If air shutter is	Flame will	Air shutter
open too far	be blue	gap should be
		decreased
		decreased

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Burner Air Shutter Adjustment Procedure

1. Locate adjustment rod and adjust air shutter to the standard setting as shown in Figure 12 (adjustment rod is located in the lower control compartment). Note: Rotating the adjustment rod clockwise decreases air and counterclockwise increases air.

2.Light appliance (follow lighting procedure on lighting label in control compartment or see homeowners manual).

3.Allow the burner to operate for at least 15 min- utes while observing the flame continuously to ensure that the proper flame appearance has been achieved (see Figure 10 or 11). If the following conditions are present, adjust accordingly.

•If flame appears weak or sooty, adjust the air shutter, incrementally, to a more open position until the proper flame appearance is achieved.

•If flame stays lowered blue, adjust the air shutter, incrementally, to a more closed position until the proper flame appearance is achieved.

4.Leave the control knob (off/pilot/on) in the ON position and the burner OFF/ON switch

OFF (& remote switches, if applicable).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

5.When satisfied that the burner flame ap- pearance is normal, close the lower control compartment door.

WARNING

Air shutter adjustment should only be performed by a qualified professional service technician.

WARNING

Ensurefrontglasspanelisinplace and sealed during adjustment.

CAUTION

The air shutter door and nearby appliance surfaces are hot. Exer- cise caution to avoid injury while adjusting flame appearance.