Evaporator A-Coil, Cased, Multipoise for R-454B Refrigerant: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
1. Set coil in place on upflow furnace discharge air opening. See
Fig. 1 and Fig. 2.
2. Ensure coil is level for proper condensate drainage. Do not tip coil
toward condensate drain. Coil casing need not be fastened or
screwed to furnace.
3. When installing wider coil on narrow furnace, create field
fabricated adapter.
NOTE: On upflow installations where the indoor coil is placed in an
unconditioned space, a 6-in wide piece of insulation should be applied
and wrapped around the outside of coil casing and supply duct contact
point.
NOTE: Consult the furnace installation instructions for any special
requirements when installing the coil to the furnace.
A05400A
Fig. 1 – Typical Horizontal Coil Installation
A05401A
Fig. 2 – Typical Vertical Coil Installation
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 Fig. 3.
1. Set uncased coil in supply duct opening.
2. Place field fabricated 4-in. minimum adapter on coil casing.
Adapter should be tapered to fit coil/furnace combination when one
of them is larger than the other.
3. Set furnace on adapter.
A170284A
Fig. 3 – Downflow Installation with Coil Rotated 90°
A170281A
Fig. 4 – Horizontal with Adapter
A170280A
Fig. 5 – Vertical with Adapter
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