Upflow Installation - Trane AUD1A040A9H21B Installer's Manual

UPFLOW INSTALLATION

Standoffs and screws (See Figure 1 on page 6) are in-
cluded with the cased coils for attachment to the fur-
nace. There are clearance alignment holes near the
bottom of the coil wrapper and drill screws are used to
engage the furnace top flange. The standoff is inserted
into the cabinet alignment hole. The drill screws are
inserted through the standoffs then screwed into the
furnace flange. The coil is always placed downstream
of the furnace airflow. These instructions apply only if
the coil is on top of an upflow furnace.
1
STANDOFFS (4)
STANDOFFS
(BOTH SIDES)
DOWNFLOW INSTALLATION
WARNING
L !
Do NOT install the furnace directly on carpeting, tile
or other combustible material other than wood floor-
ing. For vertical downflow application, subbase (BAY-
BASE205) must be used between the furnace and
combustible flooring. When the downflow furnace is
installed vertically with a cased coil, a subbase is not
required.
2
18-CD21D1-12
DRILL SCREWS (4)
FOR VERTICAL
INSTALLATIONS:
SCREWS
(BOTH SIDES)
Installer's Guide
REQUIRED FLOOR OPENING: (DOWNFLOW)
SEE FIGURE 3 AND TABLE 1
3
FURNACE
FRONT
TABLE 1
FLOOR OPENING PLENUM OPENING
CABINET RETURN
WIDTH DUCT WIDTH
14-1/2" 13-1/4" 13-5/8"
17-1/2" 16-1/4" 16-5/8"
21" 19-3/4" 20-1/8"
24-1/2" 23-1/4" 23-5/8"
HORIZONTAL INSTALLATION
The coil and furnace must be fully supported when
used in the horizontal position.
Three brackets (with screws) are included with down-
flow furnaces for installation to stabilize and secure the
furnace and TXC cased coil in the horizontal posi-
tion. See Figure 4.
IMPORTANT:
The 2/4TXC cased coil must be placed downstream of the
furnace. In horizontal installations, the apex of the coil
may point either toward or away from the furnace. See the
2/4TXC coil Installer's Guide for more details.
The cased coil is secured to the furnace and both the
furnace and the cased coil must be properly supported.
4
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
The brackets mount using the rear screws on the coil
case and use the screws provided to secure the brack-
et to the furnace. The remaining bracket is placed as
close to center as possible (horizontally) between the
coil case front and the furnace bottom channel (for
downflow/ horizontal furnace). Use four of the screws
provided to secure the bracket.
This furnace may be installed in an attic or crawl space
in the horizontal position by placing the furnace on the
left or right side (as viewed from the front in the up-
right position). The horizontal furnace installation in
an attic should be on a service platform large enough
to allow for proper clearances on all sides and service
access to the front of the furnace (See Clearance Table
on Outline Drawings and Figure 5).
If the furnace is suspended using perforated steel strap
(plumber's strap), it must be supported at all four cor-
ners and in the middle at the front of the furnace. The
A (width)
B (depth)
D
C
"A" "B" "C"
20-1/8" 12-5/8" 19-3/8"
20-1/8" 15-5/8" 19-3/8"
20-1/8" 19-1/8" 19-3/8"
20-1/8" 22-5/8" 19-3/8"
"D"