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Installation Instructions
UPFLOW INSTALLATION
Standoffs and screws (See Figure 1) are included with the cased
coils for attachment to the furnace. There are clearance alignment
holes near the bottom of the coil wrapper. Drill screws are used to
STANDOFFS (4)
STANDOFFS
(BOTH SIDES)
engage the furnace top flanges. 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. The above instructions
only apply if the coil is on top of an upflow furnace.
DOWNFLOW INSTALLATION
▲
!
Do not install the furnace directly on carpeting, tile or other
combustible material other than wood flooring. For vertical
downflow application, subbase (BAYBASE205) 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.
Required floor opening: (DOWNFLOW)
See Figure 2 and Table 1
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
FURNACE
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
FRONT
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
FIGURE 3
Page 6
DRILL SCREWS (4)
FOR VERTICAL
INSTALLATIONS:
SCREWS
(BOTH SIDES)
FIGURE 1
WARNING
FIGURE 2
A (width)
B (depth)
D
C
FLOOR OPENING PLENUM OPENING
CABINET
RETURN
WIDTH
DUCT WIDTH
14-1/2"
13-1/4"
17-1/2"
16-1/4"
21"
19-3/4"
24-1/2"
23-1/4"
HORIZONTAL INSTALLATION
The coil and furnace must be fully supported when used in the
horizontal position.
Three brackets (with screws) are included with downflow fur-
naces for installation to stabilize and secure the furnace and TXC
cased coil in the horizontal position (See Figure 4). The coil is
placed downstream of the furnace, with the apex of the coil
pointing in the direction of the airflow for horizontal installa-
tion. The cased coil is secured to the furnace and both the furnace
and the cased coil must be properly supported. The brackets
mount using the rear screws on the coil case and use the screws
provided to secure the bracket 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.
CASED COIL CONNECTION
BRACKET FOR DOWNFLOW
FURNACE IN HORIZONTAL
The downflow/horizontal 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 upright
position). The downflow/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 corners and in the middle
at the front of the furnace. The forward most screw on the side of
the furnace may be used to connect the strapping (See Figure 6).
Line contact is only permissible between lines formed by the
intersection of the top and two sides of the furnace casing and the
building joists, studs, or framing.
A cutout is provided on both sides of the downflow furnace cabinet
to allow a 90° elbow to be attached inside the cabinet and the vent
piping to connect there. In horizontal, the downflow furnace may
be vented through the top of the cabinet if needed. In vertical
configuration, the downflow furnace may be vented using the side
cabinet cutouts. This venting configuration could be used if an
electronic air cleaner is installed. When the downflow furnace
is vented through the left side of the furnace cabinet in
horizontal or vertical configuration, Type B vent pipe
must be used within the cabinet.
TABLE 1
"A"
"B"
"C"
13-5/8"
20-1/8"
12-5/8"
16-5/8"
20-1/8"
15-5/8"
20-1/8"
20-1/8"
19-1/8"
23-5/8"
20-1/8"
22-5/8"
FIGURE 4
Pub. No. 41-5010-20
"D"
19-3/8"
19-3/8"
19-3/8"
19-3/8"
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