Lennox Hearth LMDVT-3328-CPM See Page 4 for Cold Climate Insulation, and Page 7 for Clearances

Burner Air Shutter Adjustment Procedure

CAUTION

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

Burner Air Shutter Adjustment Procedure

1. Locate adjustment rod and adjust air shutter to the standard setting as shown in Figure 60 (adjustment rod is located in the lower control compartment).

Note: Move the adjustment rod down to decreases air and up to increases.

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 minutes while observing the flame continuously to ensure that the proper flame appearance has been achieved (see Figures57 or 58). If the following conditions are present, adjust accordingly.

•If flame appears weak or sooty, adjust the air shutter, incremen- tally, 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.

Figure 58- Burner Flame Appearance Model LMDV-3328 & LMDV-3530

Figure 59 - Burner Flame Appearance Model LMDV-4035

4.Leave the control knob (off/pilot/on) in the ON position and the burner OFF/ON switch OFF (& remote switches, if applicable).

5.When satisfied that the burner flame appearance is normal, re-install the lower control compartment door then proceed to finish the instal- lation.

Adjustment Set-Screw

	Adjustment
	Rod Up
Burner	(Fully Open
	Position)
Tube
Air Shutter
Adjustment Rod Down min.	Ref. Air shutter Patent:
air opening position)	U.S. Pat. 5,553,603

Main Burner Factory Air Shutter

Opening Setting - Inches (millimeter)

Model	Nat.Gas	Propane Gas
LMDVT-3328	1/16 (1.58)	1/4" (6.35)
LMDVR-3328	1/16 (1.58)	1/4" (6.35)
LMDV-3530	1/16(1.58)	5/16" (7.94)
LMDV-4035	1/8 (3.18)	3/8" (9.53)

Figure 60 - Burner Air Shutter Adjustment

Step 11. Hood Installation

(Refer to Figure 61) All of these appliances must have hoods installed prior to operating.

Install hood by sliding it into the slots on the lower edge of the cabinet top.

Finishing Requirements - Wall Details

Complete finished interior wall. To install the appliance facing flush with the finished wall, position framework to accommodate the thickness of the finished wall (Figure 61 ).

See Page 4 for Cold Climate Insulation

and Page 7 for Clearances

	This Area Must	3"
	Remain Clear of
		(76 mm)
	Combustible
	Materials
Combustible Finished	1 in. Min.
Wall Materials
	(25 mm)
	Top Spacers

Drywall Bracket / Spacer

Combustible material may touch the appliance top

Top of Appliance Louvers

Top of Door Frame

Hood must be installed as shown.

Figure 61 - Combustible Wall Framing

30

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.