How The Furnace Functions

Your Model 1321 Furnace is designed to be a supplemental or central heating source for your home. This solid fuel furnace may be installed in conjunction with a properly operat- ing central furnace that is listed or certified in accordance with nationally recognized safety standards and equipped with the required con- trols and other safety features and which has been installed in accordance with appropriate standards of the National Fire Protection Asso- ciation with installation clearances specified in the furnace nameplate marking. The installa- tion must be accomplished by a qualified agency (one who is engaged in, and is responsible for, or is thoroughly familiar with the installation and operation of the gas, oil, and solid fuel burning heating appliances, who is experienced in such work, familiar with all precautions required, and has complied with all the requirements of the authority having jurisdiction.) The installation shall be in strict accordance with the manufacturer's installation instructions furnished with the solid fuel furnace.

The chimney connector of the furnace is to be installed to provide clearances to combus- tible material not less than specified in the individual classifications and marked on the furnace. The chimney connector must be con- nected to a chimney suitable for use with resi- dential type or building heating appliances which burn solid fuel.

The Model 1321 Furnace is designed to operate in a parallel air flow arrangement with an existing central furnace or as a central fur- nace. The furnace is designed to operate in either of the following installations:

PARALLEL INSTALLATION: The design is such that when the blower comes on, the blower will only come on when the temperature in the plenum has reached the setting on the blower control. This is to insure that there is sufficient warm air in the system to make it efficient for the unit to operate. When the central system ther- mostat calls for heat, the central system will operate by the burner igniting and the blower coming on. It is possible that both systems will operate simultaneously. It is recommended that for the most efficient use of your Supple- mental Furnace, that it be fired as much as possible in order to reduce the demand on your existing central heating system.

The Warm air supply outlet of the Supple- mentary Furnace shall not be connected to the cold air return inlet of the central furnace be- cause the possibility exists of components of the central furnace overheating and causing the central furnace to operate other than is intended.

CENTRAL FURNACE INSTALLATION: As a central furnace, the unit functions independently of any other system. The blower will come on when the plenum temperature reaches the set- ting on the blower control.