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DOWNFLOW INSTRUCTIONS
Important: Read instructions below carefully
1.Before putting the Air Handler in the downflow
position, remove the three access panels and
remove the metal coil retaining bracket and filter
close off. Then remove the horizontal and vertical
drain pans. The horizontal pan is not required for
downfolw application
2.After removing the coil, turn the Air Handler to
the downflow position and relocate the (8) brackets
which include (1) tie bracket (1) rear channel
bracket, (2) zee coil supports, (2) stiffener brackets,
and (2) 3" 2 flat insulation retaining brackets. In
effect, brackets, coil, and 2 lower access panels
will be assembled 180 degrees from their former
position and shifted down with return in up position
as shown in fig.1 and fig.2.
3. Assemble drain pan insulation kit to the
bottom of the drain pan to prevent drain pan
from sweating during operation.
4. Place 3" flat insulation retainer on the bottom of
each coil slab against the aluminum fins as shown
in Fig.3. This will reduce the potential for water
blow-off into the air stream.
5. Slide the coil assembly into Air Handler and
reattach the metal coil retainer bracket to tie
bracket. See Fig.2. Then reattach the upper access
panel followed by the two lower access panels
to match the tubing and drains.
6. A 4" to 3" removable panel is recommended at
the point where the duct meets with the return
part of the Air Handler unit to allow easier
removal of coils that are too tall.
7. The "AD" coils are shipped with a check flowrator
for use with either cooling or heat pump outdoor
section which is accessible from the outside of
the unit.
WARNING: The "A" coil contains 150
p.s.i.g. of air pressure
Before setting up flowrator assembly for field
brazing see page 12 or read the Warning label
on the lower access panel.
NOTE: THE FIL TER PROVISION IS
NOT APPLICABLE IN THIS
DOWNFLOW APPLICATION
Fig.1
Fig.2
Fig.3
7
AIR HANDLER UNIT
RETURN AIR
SIDE OF UNIT
REAR
CHANNELL
BRACKET
ZEE COIL
SUPPORT
BRACKET
COIL
RETAINING
BRACKET
TIE
BRACKET
TOP OF
WRAPPER
INSULATION
JACKET
ZEE COIL
SUPPORT
WRAPPER
STIFFENER
DRAIN PAN
INSULATION
DPI KIT
(HATCHED
AREA)
BLOWER
MOTOR
3" FLAT
INSULATION
RETAINER (both
sides)