Thermo Products CMA2-75N ユーザーズマニュアル
All installations and services must be performed by qualified service personnel.
D. CLOSET INSTALLATION
1. The return air opening into the closet
is to have a minimum free area of 250
sq. in. (see Figure 5).
2. The return air opening may be
located in the top, center or (ideally) bottom
of the closet door or side wall.
located in the top, center or (ideally) bottom
of the closet door or side wall.
Figure 5.
:
Do not obstruct any return air openings, including the return
grille on the furnace. To do so may cause the furnace to activate the high
limit and shut down.
limit and shut down.
3. The cross-sectional area of the return system leading into the closet (when
located in the floor or ceiling) shall not be less than 250 square inches.
4. The total free area of openings in the floor or ceiling registers serving the
return duct system must be at least 350 square inches. At least one register must
be located where it is not likely to be covered by carpeting, boxes, furniture or
other objects.
5. Materials located in the return duct system must have a flame spread
classification of 200 or less.
6. Non-combustible pans having one inch upturned flanges are to be located
beneath openings in a floor return duct system.
located in the floor or ceiling) shall not be less than 250 square inches.
4. The total free area of openings in the floor or ceiling registers serving the
return duct system must be at least 350 square inches. At least one register must
be located where it is not likely to be covered by carpeting, boxes, furniture or
other objects.
5. Materials located in the return duct system must have a flame spread
classification of 200 or less.
6. Non-combustible pans having one inch upturned flanges are to be located
beneath openings in a floor return duct system.
7. Wiring materials located in the return duct system must conform to articles
300-22 of the National Electrical Code NFPA70 (Latest Edition).
8. Gas piping is not to be located in or through the return duct system .
300-22 of the National Electrical Code NFPA70 (Latest Edition).
8. Gas piping is not to be located in or through the return duct system .
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