Commercial Air Conditioner
Model: heat pump, 10SEER UNITS
28
Fig.8-7
7. The "HB" 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.
REFRIGERANT TUBING
Refrigerant tubing should be installed as to avoid undue stress. They must be supported or
routed to avoid strain or vibration. To avoid damage that can be caused by condensate,
insulate the suction tube with a closed cell insulation with the seams sealed. The insulation
should terminate at the tubing entrance to the air handler. Do not reduce the recommended
tubing size.
CONDENSATE REMOVAL
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.
