W415-0973 / B / 08.28.13
10
IOM
IOM
4.3 INSTALLATION IN UPFLOW, DOWNFLOW OR HORIZONTAL POSITIONS
H8.2
• “Airplane Glue” and similar adhesives and cements
• Ammonia, as commonly found in permanent wave solutions used in hair dressing salons
• Anti-static fabric softeners used in clothes dryers
• Carbon tetrachloride
• Chlorinated cleaners and waxes
• Chlorine and bromine based swimming pool chemicals
• De-icing salts or chemicals (rock salt, etc.)
• Dry cleaning fl uids such as perchloroethylene
• Fumes from curing polyurethane and similar substances
• Halogen based refrigerants including R-12 and R-22
• Hydrochloric acid, muriatic acid and other acid based masonry washing and curing materials
• Printer’s inks, paint removers, varnishes, varsol, toluene, etc.
• Water softener salt and chemicals
2. If this furnace is to be installed in an area over a fi nished ceiling or living area, install a fi eld fabricated
auxiliary drain pan under the furnace to protect that area from accidental condensate spills. The auxiliary
pan should be large enough to collect accidentally spilled condensate from the air conditioning evaporator
coil assembly if applicable.
3. If the furnace is installed in an area where freezing may occur, a garage, an attic, a crawl space or any
unconditioned space, steps must be taken to protect the condensate trap and drain line from freezing.
H8.3.2
UPFL
ormed in
accordance with instructions in the appropriate sections of this manual.
HORIZONTAL INSTALLATION: Vent positioning, pressure switch location and drain locations shall be performed in
accordance with instructions in the appropriate sections of this manual.
NON-SUSPENDED INSTALLATION: Maintain clearances to combustibles as outlined in Figure 1, Table B. The
furnace must be supported in such a way as to not allow twisting or sagging of the cabinet.
SUSPENDED INSTALLATION: Maintain clearances to combustibles as outlined in Figure 1, Table B. The
furnace may be suspended by fi eld fabricating a cradle of angle iron and threaded rod. Secure the furnace with
2” minimum slotted angle or equivalent as shown in Figure 3. The furnace must be supported in such a way as to
not allow twisting or sagging of the cabinet. Position the supports so as to not interfere with accessing the burner
and blower compartments.
DOWNFLOW INSTALLATION: Vent positioning, pressure switch location and drain locations shall be performed
in accordance with instructions in the appropriate sections of this manual.
The opening in the fl oor must provide adequate clearances to the combustible material according to the
clearance to combustible as outlined in Figure 1, Table B.
IMPORTANT:
• THE FURNACE MUST BE INSTALLED ON A LEVEL SURFACE. IT IS RECOMMENDED
THAT THE REAR OF THE FURNACE BE ELEVATED 1/4” HIGHER THAN THE FRONT
TO FACILITATE PROPER CONDENSATE DRAINAGE.
• IF THE FURNACE AND AIR CONDITIONER IS LOCATED ABOVE A FINISHED SPACE,
INSTALL A DRAIN PAN UNDERNEATH THE UNIT.
NOTE
This furnace is approved for installation in attics, alcoves, utility rooms, closets and crawl spaces. If this
furnace is to be installed in a utility room, be sure that it is located in such a way as to allow access for
servicing or the removal of other appliances installed in the room (hot water heater, for example). It is not
permissible to use a rear return on this appliance. Use only side and bottom returns.
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