5
PRODUCT DESIGN
Accessibility Clearances (Minimum)
Unobstructed front clearance of 24"
for servicing
is rec-
ommended.
SW
B
1
0
3
6
1
1
* 24" clearance for serviceability recommended.
MINIMUM CLEARANCE TO COMBUSTIBLE MATERIALS - INCHES
** Single Wall Vent (SW) to be used only as a conncetor.
Refer to the venting tables outlined in the Installation Manual for
additional venting requirements.
Vent
Sides
Top
Rear
Front*
Note:
In all cases accessibility clearance shall take prece-
dence over clearances from the enclosure where accessi-
bility clearances are greater. All dimensions are given in
inches.
High Altitude Derate
IMPORTANT NOTE:
The furnace as shipped requires no
change to run between 0 - 4500 feet. Do not attempt to
increase the firing rate by changing orifices or increasing
the manifold pressure below 4500 feet. This can cause poor
combustion and equipment failure.
High altitude installations above 4500 feet may require both
a pressure switch and an orifice change. These changes
are necessary to compensate for the natural reduction in
the density of both the gas fuel and the combustion air at
higher altitude.
For installations above 4500 feet, please refer to your dis-
tributor for required kit(s). Contact the distributor for a tabular
listing of appropriate manufacturer’s kits for propane gas
and/or high altitude installations. The indicated kits must be
used to insure safe and proper furnace operation. All con-
versions must be performed by a qualified installer, or ser-
vice agency.
