Lennox Hearth 1900HT-M operation manual Glass, Provide Adequate AIR for Combustion

CARE AND OPERATION

GLASS

The Glass is a super heat resistant ceramic that withstands continuous temperatures up to 1390° F. This temperature is well beyond the temperatures in which you operate your stove.

This unit is designed to provide a flow of air over the inside of the glass, where along with high heat helps keep it clean. When operating the stove on low for extended periods of time, the glass may get dirty. A short, hot fire (15 - 20 min- utes) will help clean off much of the normal buildup (see Troubleshooting, page 19). A commercial glass cleaner designed for stoves is recommended for cleaning.

The glass should be cleaned thoroughly with glass cleaner and a soft cloth BEFORE the stove is burned.

PRIMARY AIR CONTROL

The Model 1900HT-M has one combustion air control located under the ash lip.

Start-up:To provide sufficient combustion air to achieve a clean burn as quickly as possible, the 1900HT-M has the ability to supplement its primary air with extra "Start- Up" air. This is achieved by pulling the air control rod all the way out, and should only be adjusted to this setting when starting a fire, when refueling or otherwise for short duration’s only.

CAUTION: OPERATION WITH PRIMARY AIR CON- TROL IN "START-UP" POSITION (PULLED ALL THE WAY OUT) FOR EXTENDED PERIODS, WASTES FUEL AND CAN CAUSE DANGEROUS OVERFIRING CONDITIONS. NEVER LEAVE STOVE UNATTENDED ON HIGH SETTINGS.

Start-up

Control Plate

Positions

Adjusting Burn Rate: The primary air control handle can be pulled out to the open position for higher tem- peratures and moved in to a more closed position for lower temperatures.

IMPORTANT: Push air control all the way in (closed) before pulling rod out to set desired burn rate. This clears the high burn control plate so it is not left open.

Generally, you will want to set the air control somewhere in the low or medium range.

Low Burn - (approx. 9,000-13,000 Btu/hr.). Pull control handle out approx. 3/4”.

Low Burn

Control Plate

Positions

Medium - Burn (approx. 13,000-16,000 Btu/hr.). Pull control handle out approx. 1 1/2”.

Medium-Low Burn -

Control Plate Positions

Medium-High Burn (approx. 16,000-25,000 Btu/hr.). Pull control handle out approx. 2 1/2”, until small click is felt.

Medium High Burn - Control Plate Posi- tions

High Burn (Maximum – approx. 44,000 Btu/hr.) Pull control handle out to its full extended position.

WARNING: OPERATING STOVE ON HIGH FOR EX- TENDED PERIODS WASTES FUEL, AND WILL CAUSE A WHITE BUILD-UP (HAZE) ON GLASS AND CAN CAUSE DANGEROUS OVERFIRING CONDI- TIONS. NEVER LEAVE STOVE UNATTENDED ON HIGH.

High Burn - Control

Plate Positions

PROVIDE ADEQUATE AIR FOR COMBUSTION

In well insulated and weather tight homes, it may be diffi- cult to establish a good draft up your chimney. The poor draft is caused by a shortage of air in the house. To pro- vide the needed air, crack a window on the windward side of the house. In some cases, you may want to duct air directly from the outside to your firebox (See Outside Combustion Air, page 7), or to a nearby floor or wall vent.

USE CONTROL SETTINGS THAT WORK FOR YOU The fuel, the amount of heat you want, the type of instal- lation you have and how long you wish the fire to burn are all variables that will affect the control setting. The same control settings in a variety of installations will pro- duce different results.

Familiarize yourself with your stove by trying different settings so you can learn how much heat to expect and how long the fire will burn. It may take a week or two to learn but your patience will be rewarded by the warmth and pleasant satisfaction that only a wood fire can pro- vide.

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