Lennox Hearth MN04-VDLPM Installing The Logs, Glow, Ing Embers And Volcanic Stones, Millivolt

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Step 6. INSTALLING THE LOGS, GLOW-

ING EMBERS AND VOLCANIC STONES

Remove the gas line access plate and gasket from the provided plastic bag and install them over the opening, using the provided screws

(4) as shown in Figure 39.

Refer to Figure 43 and loosen the set screw for the venturi air shutter. Manually actuate the air shutter through several cycles. Set the air shutter to 3/32" before placing the logs.

The logs are packaged in a carton located within the firebox. One plastic bag of glowing embers and volcanic stones are located in the bottom compartment. Refer to the Log Set Placement Supplement for detailed place- ment instructions for the logs, glowing em- bers and volcanic stones.

Proper log and twig placement is critical to encourage outstanding flame appearance and prevent sooting. These fires are designed to provide a rich orange/red glow on the logs. Ensure the bottom of the rear log is fully seated and pulled as far forward as the pins will al- low. Refer to the Log Set Placement Supplement for detailed instructions.

Note: Log setup is by design asymmetric. The fire is intentionally positioned off center to provide a natural fire look.

Step 7. CHECKING APPLIANCE OPERATION

With gas line installed run initial system check- out before closing up the front of the unit. Follow the pilot lighting instructions provided in the Homeowner's Care and Operation In- structions. For piezo ignitor location see Fig- ure 39 on page 23 (millivolt appliances only).

Note: Lighting Instructions are also found on the literature tag tied to the gas piping next to the gas valve. To access the tag, open the lower control compartment door (Figure 39 on page 23 ) by pulling the panel forward.

When first lighting the appliance, it will take a few minutes for the line to purge itself of air. Once purging is complete, the pilot and burner will light and operate as indicated in the instruction manual. Subsequent lighting of the appliance will not require such purg- ing. Inspect the pilot flame (remove logs, if necessary, handling carefully).

Millivolt Appliance Checkout

The pilot flame should be steady, not lifting or floating. Flame should be blue in color with traces of orange at the outer edge.

The top 3/8" (10 mm) at the pilot generator (thermopile) and the top 1/8" min (tip) of the quick drop out thermocouple should be en- gulfed in the pilot flame.

The flame should project 1" (25 mm) beyond the hood at all three ports (Figure 40 ). Re- place logs if removed for pilot inspection.

To light the burner; turn “ON” the remote wall switch and rotate the gas valve control knob counterclockwise to the “ON” position (“ON” will be at the bottom side of the valve).

MILLIVOLT Hood Ignitor Rod

Thermocouple

3/8" Min

(9 mm)

Pilot

Nozzels

Thermopile

Figure 40

Electronic Appliance Checkout

To light the burner, turn ‘ON’ the unit mounted On/Off switch or the optional remote wall switch. Ensure the ignitor lights the pilot. The pilot flame should engulf the flame rod as shown in Figure 41.

ELECTRONIC
Sensor	Pilot
	Hood
Ignitor

Figure 41

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Step 8. INSTALLING THE GLASS DOOR AND OPTIONAL HOOD

To access the glass door securing latches, first open the lower control compartment door (Figure 42 ) by lifting and pulling the bottom panel forward.

Retrieve the glass door. Visually inspect the gasket on the backside of the frame. Gasket surface must be clean, free of irregularities and seated firmly.

Position the door in front of the firebox opening with the bottom of the door held away from the fireplace (Figure 42 ). Hook the top flange of the door frame over the top of the firebox frame. Let the bottom of the door frame swing gently in towards the fireplace ensuring that the gas- ket seats evenly as the door frame draws shut. Fasten the two latches located underneath the firebox floor to the door's vee-flange. Close both the latches securely.

If desired, install the optional hood. Note the location of the three clips inside the top air channel above the door. The clips are equally spaced on the top surface of the air channel opening. Use a screwdriver to open the clips slightly if needed. Engage the back edge of the eyebrow into the clips to secure.

Burner
Assembly
Door
Assembly
Gas Line Access Panel	Bottom Panel
Figure 42 -
INSTALLING THE GLASS DOOR

WARNING: HANDLE THIS GLASS WITH EXTREME CARE! THE GLASS PANEL IS SUSCEPTIBLE TO DAMAGE — DO NOT SCRATCH WHILE HANDLING OR WHILE RE-INSTALLING THE GLASS DOOR FRAME.