HOW THE FURNACE FUNCTIONS
Your HOTBLAST 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 operating central furnace that is listed or cer- tified in accordance with nationally recog- nized safety standards and equipped with the required controls and other safety features and which has been installed in accordance with appropriate standards of the National Fire Protection Association with installation clearances specified in the furnace name- plate marking. The installation must be ac- complished by a qualified agency (one who is engaged in, and is responsible for, or is thor- oughly familiar with the installation and op- eration of the gas, oil, and solid fuel burning heating appliances, who is experienced in such work, familiar with all the requirements of the authority having jurisdiction.) The instal- lation shall be in strict accordance with the manufacturer's installation instructions fur- nished with the solid fuel furnace.
The chimney connector of the furnace is to be installed to provide clearances to com- bustible material not less than specified in the individual classifications and marked on the furnace. The chimney connector must be connected to a chimney suitable for use with residential type or building heating appliances which burn solid fuel.
The Furnace is designed to operate in either parallel or series air flow arrangement with the central furnace or as a central fur- nace.
CENTRAL FURNACE INSTALLATION: As a central furnace, the unit functions indepen- dently of any other system. The blower will come on when the plenum temperature reaches the setting on the blower control.
PARALLEL INSTALLATION:
(See Optional Wiring Diagram, Page 13, Fig.
13)The design is such that when the blower comes on, the blower on the central system also 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 thermostat 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 HOTBLAST Fur- nace, that it be fired as much as possible in order to reduce the demand on your existing central heating system. This unit has an op- tional forced draft kit that operates from a wall thermostat. When the temperature falls below the setting on the wall thermostat, the forced draft will come on (U.S. Stove Option 11/DIKL)
The warm air supply outlet of the HOTBLAST Furnace shall not be connected to the cold air return of the central furnace, because the possibility exists of components of the central furnace overheating and caus- ing the central furnace to operate other than is intended.
SERIES INSTALLATION:
This type of installation uses only the blowers of the existing central furnace. The solid fuel fan/limit control must also control the functions of the existing furnace. All electrical power must come from a single branch circuit (See Fig. 14).
5
