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Installer's Guide
HORIZONTAL RIGHT
a. For maximum efficiency and Customer ease of
filter maintenance, it is recommended that a
properly sized remote filter grille be installed
for horizontal applications. Airflow should not ex-
ceed the face velocity of the filter being used.
The factory installed filter should then be
removed from the unit.
b. Unit is shipped from the factory in the upflow or
horizontal right configuration. Unit conversion is
not required.
c. If the unit is suspended, it must be supported
from the bottom near both ends as well as the
middle to prevent sagging. The service access
must remain unobstructed. If the unit is sup-
ported along the length of the front and back, the
air handler only needs to be suspended at both
ends. See Figure 14.
d. If the unit is not suspended it must be isolated
carefully to prevent sound transmission. Vibra-
tion isolators (purchased locally) must be placed
under the unit.
e. It is always recommended that an auxiliary drain
pan be installed under a horizontal air handler
(See Condensate Drain Piping) to prevent pos-
sible damage to ceilings.
f. Isolate the auxiliary drain pan from the unit or
from the structure.
g. If a return duct is connected to the air handler, it
must be the same dimensions as the return
opening shown in the outline drawing on page
14.
h. If a return duct is connected to the air handler, it
must be the same dimensions as the return
opening shown in the outline drawings.
i. Openings where field wiring enters the cabi-
net must be completely sealed. Location of
power entry is shown on the outline drawing.
Use 2.5" clear stickers provided to seal all unused
electrical knockouts. See Figure 13.
j. After ductwork connections are made, seal air-
tight and per Local codes.
D. DUCT CONNECTIONS
The supply and return air ducts should be connected to
the unit with flame retardant duct connectors.
Convertible duct flanges are provided on the discharge
opening to provide a "flush fit" for 3/4" or 1-1/2" duct
board applications, see the Outline drawing on page 16
for sizes of the duct connections. After the duct is se-
cured, seal around the supply duct to prevent air leak-
age.
NOTE: If the convertible duct flanges are not used, they
must be removed and discarded for proper airflow.
8
Figure 15
Flange Attachment
E. REFRIGERANT PIPING
IMPORTANT:
Refrigerant piping must be routed to maintain service
access to blower compartment and provide easy re-
moval of filter access panel and filter.
NOTE: Penetration around the Refrigerant lines must
be sealed and Electrical inlets need to be sealed at
both the low and the high voltage.
1. Refrigerant connections are made outside the cabi-
net.
2. Installation of refrigerant lines is covered in the in-
stallation instructions packaged with the outdoor
unit. Evacuation, leak testing and brazing proce-
dures are included in those instructions. Read those
instructions before starting installation of refriger-
ant lines.
NOTE: TXV Equipped is Non-Bleed, and may require a
start kit on the outdoor unit.
BRAZE SHIELD
Figure 16
18-GE12D1-8
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