Lennox Hearth MN53-VDLE, MN04-VDLE, MP53-VDLE SIT Millivolt Gas Valve, Glass Cleaning, Maintenance

Gas Controls/Control Compartment Access

The gas controls can be found behind the bottom panel. Remove the bottom panel by pulling it towards the front.

On millivolt systems, the piezo ignitor, Hi/Lo flame adjustment knob, and pilot and main gas ON/OFF control knob are located behind the panel. See Figure 1.

Operation of millivolt and electronic gas con- trol systems are different. Before lighting and operating your appliance determine if you have a millivolt or electronic appliance.

Pilot Stage

Terminal

Ground (TP)

TP

Gas Outlet

To Burner

Pressure-Tap (Inlet)

	IN
TH TP
LO	HI
TH	OUT
	VENT

Pilot Gas

Outlet

PILOT	Supply Gas
IN	Inlet

Refer to Figure 1 for access to the gas control valve. Millivolt appliances will be fitted with the gas control valve shown in Figure 2.

Burner Stage	Regulator	Pressure-Tap
Terminal	Mounting Screw	(Manifold)
Figure 3		Dexen Electronic Gas Valve



Appliances with electronic systems will be fitted with the electronic valve shown in Figure 3. Familiarize yourself with the gas control valve that your appliance uses.

Millivolt Appliances -

To light millivolt appliances refer to the detailed lighting instructions found on page 12 (English) and page 13 (French). Millivolt appliance light- ing instructions may also be found on the pull out lighting instruction labels attached to the gas control valve.

Millivolt appliances are fitted with an ON/OFF Rocker Switch for appliance ON/OFF control. See Figure 1 for its location. Once the pilot is lighted, the ON/OFF rocker switch will control the appliance ON/OFF operation. To operate: Toggle the switch between its ON and OFF positions.

If your millivolt appliance is equipped with an optional remote wall switch or remote control kit and the pilot is lit, the appliance main burner may be turned on and off with the wall switch or remote control.

Main Gas Control Knob

						OT
					IL
					P
	T	ON
		it	WO			TH
L
	O			L
I
	P
		FFO	H I			TP
						TPTH
IN		OUT
Inlet	Manifold Pressure
	Port				Variable Flame
Pressure
Port					Height Adjustment

SIT Millivolt Gas Valve

Note: Refer to Figure 1 for the location of the piezo ignitor.

Figure 2

Electronic Appliances -

To light electronic appliances refer to the detailed lighting instructions found in both English and French on pages 14 and 15 of these instructions respectively. Electronic appliance lighting instructions may also be found on the pull out lighting instruction labels attached to the gas control valve. See Figure 1 for its location.

If your electronic appliance is equipped with an optional remote wall switch or remote control kit the appliance main burner may be turned on and off with the wall switch or remote control.

Variable Flame Height Adjustment (Millivolt And Electronic Appliances)

1.All Millivolt and Electronic appliances are equipped with a variable gas control valve. Flame height for these models may be adjusted through a range between fixed low and high settings, alternately, while the appliance is in operation.

Adjust the flame height as desired after lighting the appliance by rotating the variable adjustment control knob located on the front of the valve (refer to Figure 2).

2.When lit for the first time, this appliance will emit a slight odor for an hour or two. This is due to the “burn-in” of internal paints and lubricants used in the manufacturing process.

3.Keep lower control compartment clean by vacuuming or brushing at least twice a year. More frequent cleaning may be required due to excessive lint from carpeting, bedding materials, etc. It is important that control compartments, burners and circulating air passageways of the appliance be kept clean.

4.Always turn off gas to the pilot (millivolt appliances) before cleaning. Before re-lighting, refer to the lighting instructions in this manual. Instructions are also found on a pull-out panel located on the floor of the appliance.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

5.Always keep the appliance area clear and free from combustible materials, gasoline and other flammable liquids.

6.Remember,Millivoltapplianceshaveacontinu- ous burning pilot flame. Exercise caution when using products with combustible vapors.

Glass Cleaning

It will be necessary to clean the glass periodi- cally. During start-up it is normal for conden- sation to form on the inside of the glass. This can cause lint, dust and other airborne particles to cling to the glass surface. Also initial paint curing may deposit a slight film on the glass. It is therefore recommended that the glass be cleaned two or three times with a non-ammo- nia household cleaner and warm water (a gas fireplace glass cleaner is recommended). After that the glass should be cleaned two or three times during each heating season, depending on the circumstances present.

Note: Clean glass after first two weeks of operation.

Warning: Do not use abrasive cleaners. Never clean the glass when it is hot.

Caution: Do not attempt to touch the front enclosure glass with your hands while the fireplace is in use.

Maintenance

The appliance and venting system should be thoroughlyinspectedbeforeinitialuseandatleast annuallybyaqualifiedservicetechnician.However, more frequent periodic inspections and cleanings should be performed by the homeowner.

Homeowner must contact a qualified service technician at once if any abnormal condition is observed.