CAUTION:
If these furnaces are used during construc-
tion 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 adhe-
sives, paints, thinners, masonry cleaning materials, and
many other solvents commonly used in 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 clear-
ance to combustibles label. (See Fig. 2.) Locate furnace where
available electric power and gas supplies meet specifications on
furnace rating plate.
II.
FURNACE
LOCATION
RELATIVE
TO
COOLING
EQUIPMENT
The cooling coil must be installed parallel with or on downstream
side of furnace to avoid condensation in heat exchanger. When
installed parallel with a furnace, dampers or other means used to
control flow of air must prevent chilled air from entering furnace.
If dampers are manually operated, they must be equipped with a
means to prevent operation of either unit unless damper is in
full-heat or full-cool position.
III.
HAZARDOUS LOCATIONS
INSTALLATION
I.
INSTALLATION IN DOWNFLOW APPLICATION
NOTE:
For downflow application, this furnace is approved for
use on combustible flooring when accessory floor base (available
from manufacturer) Part No. KGASB0201ALL is used. Accessory
floor base is not required when this furnace is installed on
manufacturer’s Coil Assembly Part No. CD5 or CK5, or Coil Box
Part No. KCAKC is used.
1. Determine application of condensate trap being installed
from Table 1.
2. Construct hole in floor per dimensions specified in Table 2
and Fig. 8.
3. Construct plenum to dimensions specified in Table 2 and
Fig. 8.
4. If downflow accessory floor base (KGASB) is used, install
as shown in Fig. 9.
If Coil Assembly Part No. CD5 or CK5 or Coil Box Part
No. KCAKC is used, install as shown in Fig. 10.
NOTE:
Remove furnace perforated, discharge duct flanges when
they interfere with mating flanges on coil on downflow subbase.
To remove furnace perforated, discharge duct flange, use wide
duct pliers or duct flange tool to bend flange back and forth until
it breaks off. Be careful of sharp edges. (See Fig. 11.)
WARNING:
Do not install furnace on its back. Safety
control operation will be adversely affected. Never con-
nect return-air ducts to back of furnace. Failure to follow
this warning could result in fire, personal injury, or death.
A93043
FRONT
BACK
FRONT
B
A
C
K
CAUTION:
If these furnaces are installed in an uncon-
ditioned space where ambient temperatures may be 32°F
or lower, freeze protection measures must be taken.
A93058
32
°
F MINIMUM INSTALLED
AMBIENT OR FREEZE
PROTECTION REQUIRED
WARNING:
When furnace is installed in a residential
garage, it must be installed so that burners and ignition
sources are located a minimum of 18 in. above floor. The
furnace must be located or protected to avoid physical
damage by vehicles. When furnace is installed in a public
garage, airplane hangar, or other building having a
hazardous atmosphere, unit must be installed in accor-
dance with requirements of National Fire Protection
Association, Inc.
A93044
18-IN. MINIMUM
TO BURNERS
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Summary of Contents for 351DAS
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