4
18-AD35D1-2D-EN
Installer’s Guide
G. 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: While not
required, optional removal of some coil components will
maximize airflow efficiency.
a. Remove the coil by sliding the coil out of the coil enclosure.
b. Optional but recommended: On 4TXCC009DS and
4TXCD010DS only, remove the (2) outer water diverter
baffles by removing the 5/16” hex head screws. See
Figure 8.
Figure 8
Figure 11
Co
mf
or
t
TM
co
il
CASED COIL SHOWN INSTALLED HORIZONTAL LEFT WITH A DOWNFLOW
FURNACE AND HORIZONTAL ALIGNMENT BRACKETS
BRACKETS SHIP WITH
DOWNFLOW FURNACES.
REQUIRED FOR ALIGNMENT
ON HORIZONTAL INSTALLATIONS.
AIRFLO
W
FURNA
CE
DUCT
SPLASH
GUARD
CASED COIL
Figure 10
Figure 9
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
Standoffs and screws (See Figure 3) are included with the cased
coils for attachment to the furnace. There are clearance align-
ment holes near the bottom of the coil wrapper. Drill screws are
used to engage the top flanges of the furnace. The standoff is in-
serted into the cabinet alignment hole (See Figure 3). The drill
screws are inserted through the standoffs then screwed into the
furnace top flange. The coil is always placed downstream of the
furnace airflow. The coil and furnace must be fully supported
when used in the horizontal position. The standoffs and screws
are strictly for securing alignment, not for support in horizontal.
2. HORIZONTAL LEFT (All coils)
The non-condensing furnaces may be laid on either side
for horizontal application. The condensing downflow/hori-
zontal and upflow/horizontal furnaces may only be rotated
onto their left side. Connection brackets for coil/furnace
alignment are included with the furnaces.
a. In horizontal left, the
4TXC
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. There are three brackets included with the non-
condensing downflow furnace which are used to connect
the furnace and coil together. See Figure 9.
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 horizon-
tal coil and furnace (see Figure 10). Four additional
screws will be used to attach each rear bracket.
f. The front bracket is positioned as close to the cen-
ter 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 fur-
nace.
g. There is a splash guard packaged with the coil. This
guard is for horizontal left coil installation only. The
guard has a bend which is inserted into the front chan-
nel 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 11.
