Thermo Products MO-425 manual General Instructions Read Before Start of Installation

All installations and services must be performed by qualified service personnel.

I. GENERAL INSTRUCTIONS - READ BEFORE START OF INSTALLATION

1.The heating output capacity of the furnace proposed for installation should be based on a heat loss calculation made according to the manuals provided by the Air Conditioning Contractors of America (ACCA) or the American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc. (ASHRAE).

2.All local codes and/or regulations take precedence over the instructions in this manual and should be followed accordingly. In the absence of local codes, installation must conform with these instructions and regulations of the National Fire Protection Association, and to the provisions of the National Electrical Code (ANSI/NFPA 70-1999, or latest edition).

3.The installed furnace must be level and positioned in a central location with respect to outlet registers. It should be located near the chimney to minimize any horizontal run of flue pipe, which may be required.

4.A furnace installed in a residential garage must be installed so the burner and ignition source are located higher than 18 inches above the floor, unless the required combustion air is taken from the exterior of the garage. Also, the furnace must be located or protected to avoid physical damage by vehicles.

?WARNING: This furnace is not to be used as a construction heater.

5. Listed below are definitions of "COMBUSTIBLE MATERIAL" and "NON-COMBUSTIBLE MATERIAL."

COMBUSTIBLE MATERIAL:

Material made of or surfaced with wood, compressed paper, plant fibers, plastics, or other material that will ignite and burn, whether flame resistant or not.

NON-COMBUSTIBLE MATERIAL:

Material that is not capable of being ignited and burned. Such materials consist entirely of, or a combination of, steel, iron, brick, tile, concrete, slate, or glass.

6.The area in which the furnace is located must have as adequate supply of air for combustion and draft control operation. Open, non-partitioned basements, below grade utility rooms without storm windows, or rooms with loose access doors will generally permit adequate air infiltration. However, if the furnace is located in an area of the building with tightly fitting doors and windows, two openings into another room are recommended (each opening having a free area of 1 square inches per 1,000 BTUH input of the total input of all appliances located in the room). If these openings are in a wall, they must be at least 6 inches from the ceiling and floor (Fig. 1A) or if they are in a door, they must be at least 6 inches from the top of the door and 6 inches from the bottom of the door. (Fig. 1B). THESE OPENINGS MUST BE FREE AND UNOBSTRUCTED.

EXAMPLE: 100,000 BTUH input furnace requires "two" openings of 100 square inches each.

(Fig. 1A) (Fig. 1B)

Fig 1: Properly Positioned Combustion Air Openings In Walls (Fig. 1A) and Doors (Fig. 1B).

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