Instruction Manual

2
furnace when the furnace is one size smaller than the coil (i.e.
coil height = 17.5-inches and furnace width = 14-inches) (See
figure 3).
Duct Flange Attachment
1. Remove the shipping bracket spanning the A-Coil apex
to the rear of the wrapper on all models prior to installation.
2. The bottom duct flange for the supply plenum side is
shipped unattached. Carefully insert the flange into bottom rail
and use a 5/16" screw to attach at the middle of the flange.
BACK RAIL
FRONT RAIL
DUCT FLANGE
SHIPPING BRACKET
TO BE REMOVED PRIOR
TO INSTALLATION
DUCT FLANGES ARE IN THE
ACCESSORY KIT INCLUDED
WITH THIS UNIT. REMOVE THE
DUCT FLANGES FROM KIT
PACKAGING AND INSTALL AS
INSTRUCTED IN STEP 3.
Figure 2
Horizontal Right Application
3. Using the hardware and brackets provided, attach the coil
to the furnace then attach the plenum to the coil (Figure 3).
COIL
PLENUM
FRONT BRACKET
ACCESSORY
FURNACE
TOP & BACK
BRACKET
ACCESSORY
ACCESSORY
TOP & BACK
ACCESSORY
FRONT BRACKET
COIL
FURNACE
BRACKET
PLENUM
(Z-BRACKET WITH NARROW FURNACE)
Figure 3
Installation of Furnace, Coil and Plenum
Using tape or mastic seal between the coil and furnace and
the coil and plenum.
Condensate Drain Piping
When coils are installed above ceilings, or in other locations
where damage from condensate overflow may occur, it is MAN-
DATORY to install a field fabricated auxiliary drain pan under
the coil cabinet enclosure. Drain lines from the auxiliary pan
must be installed and terminated so that the homeowner can
see water discharges.
Primary condensate drain connections are located in the drain
pan at the bottom of the coil/enclosure assembly. Use the
female (3/4 fpt) threaded fitting that protrudes outside of the
enclosure for external connections.
1. Ensure drain pan hole is NOT obstructed.
2. To prevent potential sweating and dripping on finished
space, it may be necessary to insulate the condensate
drain line located inside the building. Use Armaflex
®
or
similar material.
A Secondary Condensate Drain Connection, now called for by
many building codes, has been provided. Pitch the drain line
1/4" per foot to provide free drainage. Install a condensate trap
to ensure proper drainage.
If secondary drain is not installed, the secondary access
must be plugged.
CAUTION
Do not use this coil on OIL furnaces or any application
where the temperature of the drain pan may exceed
300ºF. A field fabricated metal drain pan should be used
for these type of applications. Failure to follow this
warning may result in property damage and/or personal
injury.
WARNING
Cased Coil
3" MIN.
POSITIVE LIQUID SEAL
REQUIRED AT TRAP
Drain
Connection
2" MIN.
Figure 4
Refrigerant Lines
A quenching cloth is strongly recommended to
prevent scorching or marring of the equipment
finish when welding close to the painted surfaces.
Use brazing alloy of 5% minimum silver content.
WARNING
All cut ends are to be round, burr free, and cleaned. Any other
condition increases the chance of a refrigerant leak. Use a
pipe cutter to remove the closed end of the spun closed suc-
tion line.
To avoid overheating after brazing, quench all welded joints
with water or a wet rag.