18-AD37D1-1-EN
5
Installer’s Guide
H. FURNACE IN HORIZONTAL LEFT POSITION
▲
CAUTION
!
Both the coil and furnace must be fully supported. Do not
attempt to suspend the coil using the brackets.
1. HORIZONTAL LEFT COIL CONVERSION:
S-Series upflow furnaces can be horizontal left or right. For
legacy furnaces, the non-condensing furnaces may be laid on
either side for horizontal application. The condensing down-
flow/horizontal right and upflow/horizontal left furnaces
may only be rotated onto their left side. Connection brackets
for coil/furnace alignment are included with the furnaces.
a. For horizontal left applications, the hairpin baffle
must be installed.
1. Remove the coil by removing the front panels and
sliding the coil out of the coil enclosure.
2. Using the provided 5/16" hex head screws, install
the hairpin baffle shipped with the coil onto the rear
of the left coil slab as close to the coil apex as pos-
sible. Location of the hairpin baffle with vary by coil
model. See Figure 9.
3. Slide the coil back into the enclosure and attach
panels.
a. In horizontal left, the
A4MX
coil case is rotated so
the apex of the coil is away from the furnace and the
auxiliary drain pan is now on the lower side.
b. The two piece baffle ships installed on the coil and is
required for horizontal left applications.
c. The base of the coil enclosure is placed flush against
the downflow/horizontal furnace. Upflow/horizontal
condensing furnaces have the coil match the top flange.
d. For downflow furnaces with no duct flange, there are
three brackets included which are used to align and
connect the furnace and coil together . See Figure 10.
e. Two brackets are used to attach the rear of the coil
and furnace and one bracket is used to attach the front.
The rear brackets will use existing screws on the coil
enclosure (two on each side at the bottom). Each of the
rear brackets will be attached with the wide side of the
bracket resting on the top and bottom of the horizontal
coil and furnace (see Figure 11). Four additional screws
will be used to attach each rear bracket.
f.
The front bracket is positioned as close to the center as
possible with the narrow edge against the coil enclosure
and the wide edge against the furnace . Two screws each
are driven into the coil enclosure and furnace.
g.
There is a 2 piece splash guard packaged with the
coil for horizontal left coil installation only. First, insert
the splash guard bracket in the drain pan channel. The
splash guard has a bend which is inserted into the front
channel of the horizontal drain pan on the outlet air side
of the coil case. The guard is then rotated downward
until it rests in the drain pan. One sheet metal screw is
driven through the coil case duct flange on the front side
and into the splash guard side hole. See Figure 12.
h. Secure alignment between the furnace and coil cabi-
net using field-provided self-tapping screws (see Figure
3). For S-series furnaces, bend furnace duct flanges out-
ward for cased coil alignment. Drill screws into furnace
duct flange though clearance alignment holes located
near bottom of coil cabinet. The coil and furnace must
be fully supported when used in the horizontal position.
These screws are strictly for securing alignment, not for
support in horizontal. The coil is always placed down-
stream of the furnace airflow.
Figure 12
SPLASH GUARD BRACKET
CASED COIL SHOWN INSTALLED HORIZONTAL LEFT WITH A DOWNFLOW
FURNACE AND HORIZONTAL ALIGNMENT BRACKETS
BRACKETS SHIP WITH DOWNFLOW
NON-CONDENSING FURNACES.
REQUIRED FOR ALIGNMENT
ON SOME HORIZONTAL INSTALLATIONS.
AIRFLO
W
FURNA
CE
DUCT
SPLASH
GUARD
CASED COIL
Figure 11
Figure 10
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
Figure 9
Note: Downflow legacy
condensing furnaces can-
not be configured for HL.
