CAUTION: If these furnaces are used during construction when adhesives, sealers, and/or new carpets are being installed, make sure all combustion and circulating air requirements are followed. If operation of furnace is required during construction, use clean outside air for combustion and ventilation. Compounds of chlorine and fluorine, when burned with combustion air, form acids which will cause corrosion of heat exchangers. Some of these compounds are found in paneling, dry wall adhesives, paints, thinners, masonry cleaning materials, and many other solvents commonly used in the construction process.
Excessive exposure to contaminated combustion air will result in safety and performance related problems.
Provide ample space for servicing and cleaning. Always comply with minimum fire protection clearances shown on unit’s clearance to combustibles label. (See Fig. 3.) Locate furnace where available electric power and gas supplies meet specifications on furnace rating plate.
FRONT
BACK
FRONT
B
A
C
K
A93043
Fig. 14—Prohibit Installation on Back
32oF MINIMUM INSTALLED AMBIENT OR FREEZE PROTECTION REQUIRED
A93058
Fig. 15—Freeze Protection
WARNING: Do not install furnace on its back. (See Fig. 14.) Safety control operation will be adversely affected. Never connect
CAUTION: If this furnace is installed in an unconditioned space where the ambient temperatures may be 32°F or lower, freeze protection measures must be taken. (See Fig. 15.)
PROCEDURE 2—LOW-FIRE ONLY INSTALLATION
This 355MAV furnace can be installed to operate in the
When the model no. on the furnace rating plate is followed by an asterisk (*), the furnace has an alternate