Installation Manual

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Specifications subject to change without notice.
NOTE: On upflow installations where the indoor coil is placed in
an unconditioned space, a 6” wide piece of insulation should be
applied and wrapped around the outside of coil casing and
supply duct contact point.
Horizontal Right & Left Installation
A170281
Vertical Upflow & Downflow Installation
A170280
Figure 2 - Adapter(s) Installation When Coil Overhangs
Furnace
Downflow Coil Installation
IMPORTANT: Installing “A” coils rotated 90 degrees from the
front of the furnace in downflow applications can cause water
blow off or coil freeze up. This is due to the concentration of air
on one coil slab or lack of air on the opposite coil slab. If the
airflow is high due to ductwork or other causes, and there is a
chance for water blow off, it is recommended that a 4- in.
minimum field- supplied adapter be placed between the coil
and the furnace to allow the air to distribute evenly to both coil
slabs. (See Figure 3)
4”
A170284
Figure 3 - Downflow Installation with Coil Rotated 90
4. Set c ased coil on supply duct opening.
5. Place field fabricated 4- in. minimum adapter on coil
casing. Adapter should be tapered to fit c oil/furnace
combination when one of them is larger than the other.
6. Set furnace on adapter.
NOTE: In downflow installation with a 4 - way multipoise
furnace, break off perforated duct flanges on furnace. See
furnace installation instructions.
Horizontal Coil Installation
The unit can be installed on a work platform, secured to roof
truss in attic, suspended from hangers on floor joists in crawl
space, or installed on blocks. It is designed to allow airflow in
either direction, to mate with horizontal- left or horizontal- right
furnace installations. Ensure c oil cabinet is level side to side
and front to back. It is allowable to add up to 1/2- in. additional
slope over length and depth of coil cabinet in the direction of
drain pan connection.
Horizontal Right Installation
1. Use field fabricated attachment plates to secure coil to
furnace. (See Figure 4)
2. Use self- tapping screws to mount attachment plates to
coil casing.