9
INSTALLATION POSITIONS
This furnace may be installed in an upright position or
horizontal on either the left or right side panel. Do not
install this furnace on its back. For vertical installations,
return air ductwork may be attached to the side panel(s)
and/or basepan. For horizontal installations
,
return air
ductwork must be attached to the basepan.
NOTE:
Ductwork must never be attached to the back of the
furnace. Refer to “Recommended Installation Positions”
figure for appropriate installation positions, ductwork
connections, and resulting airflow arrangements.
Alternate Vent/Flue Location
Figure 2A
Figure 2B
Figure 2C
Recommended Installation Positions
HORIZONTAL APPLICATIONS &
CONSIDERATIONS
When installing a furnace horizontally, additional
consideration must be given to the following:
Furnace Suspension
If suspending the furnace from rafters or joists, use 3/8”
threaded rod and 2”x2”x1/8” angle iron as shown in the
following diagram. The length of rod will depend on the
application and the clearances necessary.
If the furnace is installed in a crawl space it must be
suspended from the floor joist or supported by a concrete
pad. Never install the furnace on the ground or allow it to
be exposed to water.
Figure 3
Front Cover Pressure Switch Tube Location
When a furnace is installed horizontally with left side down,
the front cover pressure switch tube must be re-located to
the lower port of the collector box cover.
1. Remove tube from front cover pressure switch and
collector box cover.
2. Remove rubber plug from bottom collector box port
and install on top collector box port.
3.
Locate 24” x 1/4” tube in bag assembly.
4. Install one end on front cover pressure switch.
5. Route tube to lower port on collector box cover and
cut off excess tubing.
Drain Trap and Lines
In horizontal applications the condensate drain trap is
secured to the furnace side panel, suspending it below the
furnace. A minimum clearance of 5.5” below the furnace
must be provided for the drain trap. Additionally, the
appropriate downward piping slope must be maintained
from the drain trap to the drain location. Refer to
Condensate Drain Trap and Lines for further details. If the
drain trap and drain line will be exposed to temperatures
near or below freezing, adequate measures must be taken
to prevent condensate from freezing.
