All installations and services must be performed by qualified service personnel.
1.Utility Room (example of a confined space)
In buildings of unusually tight construction, such as those wherein weather stripping and storm sash windows are used, two (2) permanent openings connecting to a
(1) square inch per 1000 BTUH of total input rating of all appliances to be installed in the utility room. One opening should be located near, or in, the ceiling of the room and the other should be located near, or in, the floor.
2.Full Basement (example of an unconfined space)
Where a furnace is installed in a full basement, infiltration is normally adequate to provide air for combustion and ventilation.
When an opening in the outside wall must be provided, it should be furnished with properly screened metal sleeves.
If an exhaust fan, or additional fuel burning appliances, are present in the furnace room, there should be increased concern about providing adequate airflow to the furnace. Additional efforts may be required to assure an adequate supply of combustion and ventilation air is available to the furnace under all conditions.
F. MDA1 Horizontal Installation
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The auxiliary limit switch must be relocated in accordance with the following instructions when installing this furnace horizontally.
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DO NOT hang the horizontal / counterflow furnace from a structure or surface by any integral part or fastener of the furnace. The furnace was not designed to support itself in this manner.
The
If the unit is placed on its right side the auxiliary limit switch located on the right side of the house air blower must be moved to the opposite (left) side of the blower (refer to Figure 2).
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