8) In all cooling applications, a secondary drain pan must be provided by the installer and
9)Before setting up flowrator assembly for field brazing see page 12 or read the
Warning
label
on the lower access panel
.
placed under the entire unit with a separate drain line properly sloped and termina t e d as required by
10) Incorrect installtion or improper practices could affect the product warranty.
local codes.
Note: the *M22 units can be installed as upflow discharge.
Fig. 6 -6
13
Central Air Conditioning Model: Air Handler, HB-D series
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
s
, (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
durin
g
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 acces
e
s anel 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 "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.