United States Stove 22AF owner manual Service Hints, Chimney Maintenance

SERVICE HINTS

Do not expect a furnace to draw. It is the chimney that creates the draft. Smoke spillage into the house or exces- sive build-up of water or creosote in the chimney would keep it from functioning properly. Correct the problem before using this

furnace. Possible causes are:

1.The connector pipe may be pushed into the chimney too far, stopping the draft (Fig. 6).

2.Do not connect two furnaces or a stove and a furnace into the same chimney flue.

3.The chimney used for a furnace must not be used to ventilate the cellar or basement. If there is a cleanout opening at the base of the chimney, it must be closed tightly.

4.If the chimney is operating too cool, water will condense in the chimney and run back into the furnace. Creosote formation will be rapid and may block the chimney. Operate the furnace at a high enough fire to keep the chimney warm preventing this condensation.

5.If the fire burns well but sometimes smokes or burns slowly, it may be caused by the chimney top being lower than another part of the house or a nearby tree. The wind blowing over a house or a tree, falls on top of the chimney like water over a dam, beating down the smoke. The top of the chimney should be at least 3 feet above the roof and be at least 2 feet higher than any point of the roof within 10 feet (Fig. 5).

6.See page 28 for list of trouble shooting tips.

A DRAFT READING OF .05 TO .06 W.C. IS SUGGESTED FOR PROPER BURNING OF THIS UNIT WHEN USING WOOD.

CHIMNEY MAINTENANCE

Creosote and Soot - Formation and Need for Removal

When wood is burned slowly, it produces tar and other organic vapors, which combine with expelled moisture to form creosote. The creosote vapors condense in the rela- tively cool chimney flue of a slow-burning fire. As a result, creosote residue accumulates on the flue lining. When ignited, this creosote makes an extremely hot fire.

The chimney should be inspected at least twice monthly during the heating season to determine if a creosote or soot build-up has occurred.

If soot or creosote has accumulated, it should be removed to reduce the risk of a chimney fire.

Chimney fires burn very hot. If the chimney catches fire, imme- diately call the fire department, then reduce the fire by closing the inlet air control. Pour a large quantity of coarse salt, baking soda or cool ashes on top of the fire in the firebox.

CAUTION

A Chimney fire may cause ignition of wall studs or rafters which you thought were a safe distance from the chimney. If you have a chimney fire, have your chimney inspected by a qualified person before using again.

20 •DRAWINGS FOR ILLUSTRATION PURPOSES ONLY•