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9. For left side drains, cut 0" to 7" (17.8 cm) from the long end of
Hose B and discard. See the following chart.
10. Secure the remaining Hose B to Tube 1 with a green hose
clamp.
11. Route other end of Hose B to the front left side panel
grommet hole.
Models
Cabinet Width
(kBtu/Tons)
17¹⁄₂" (44.5 cm)
45
21" (53.4 cm)
70
24¹⁄₂" (62.3 cm)
90
115
12. Insert the short end of each Tube 2 through the side panel
grommet holes.
13. Secure the tubes to Hose A and Hose B with the green hose
clamps.
NOTE: Ensure hoses and tubes maintain a downward slope
for proper drainage and that they are not kinked or binding.
14. For instructions to mount the drain trap, see "Condensate
Drain Lines and Drain Trap—Upright Drain Trap Mounting."
Install Condensate Condensate Drain Lines and
Drain Trap—Alternate Vent/Flue Drain Hose
Connections
Upright Installation —Right Side Only Drain Hoses
Upright installations using the alternate vent/flue outlet will
require right-side only drain hoses to be connected as follows.
See "Determine Vent Pipe Direction" for details on alternate vent/
flue pipe connection.
1. Remove the rubber plug from the right-side drain port on the
front cover. Save the rubber plug for later use.
2. Secure Hose A to the drain port on the front cover with a red
hose clamp.
3. Route Hose A to the right side panel grommet hole on the
rear panel.
4. Remove the grommet from the right-side panel drain hole on
the front panel.
5. Seal the hole in the grommet with the large end of the rubber
plug removed in Step 1.
6. Reinstall the grommet and rubber plug into the side panel
drain hole.
7. Cut ¹⁄₄" (6.4 cm) from the end of the drain port on the
externally mounted rubber elbow. Discard cut portion.
8. Insert Tube 1 into the rubber elbow drain port and secure with
a red hose clamp.
NOTE: Angle tube outward toward front of furnace.
9. Cut 17⁷⁄₈" (45.4 cm) from the long end of Hose B. Discard cut
portion.
10. Secure the remaining end of Hose B to the exposed end of
Tube 1 with a green hose clamp.
11. Route Hose B toward the right side panel grommet holes.
12. Insert the short end of one Tube 2 through the rear right side
panel grommet drain hole.
13. Secure Tube 1 to Hose A with a green hose clamp.
14. Insert the short end of the remaining Tube 2 into Hose B from
the rubber elbow and secure with green hose clamp.
24
Length to Cut from Long
End of Hose B
7" (17.8 cm)
3¹⁄₂" (8.89 cm)
0"
0"
15. Ensure that the hoses and tubes maintain a downward slope
for proper drainage and are not kinked or binding.
Alternate Upright Upflow Connections—Right Side Only
(Counterflow Similar)
A
D
A. Front cover drain port
B. Rubber elbow (externally mounted)
C. Rubber elbow drain port
D. Red hose clamps
E. Tube 1
F. Green hose clamps (3)
Upright Drain Trap Mounting—Left or Right Side Panel
1. Insert the drain tubes into the drain trap and position the
drain trap against the side panel.
NOTE: Drain tubes must reach the bottom of the drain trap.
2. Secure the drain trap to the side panel at the mounting holes
(dimples or crosshairs on counterflow models) located below
the grommet drain holes.
3. Attach the PVC drain line to the drain trap outlet with either a
90° elbow or coupling.
Horizontal Installations—Right Side Down
Horizontal installations with the right side down require that the
drain hoses be connected to the right side front cover drain port
and the rubber elbow drain port.
NOTE: On counterflow models, relocation of the front cover
pressure switch hose is required.
1. Remove the rubber plug from the coil front cover drain port.
NOTE: On counterflow furnaces, relocate the front cover
pressure switch hose connection from the left side pressure
tap to the right (down) side tap to guard against blocked drain
conditions. Cut the hose to appropriate length to minimize
sagging. Plug the left (unused) pressure tap with the plug
removed from right side.
2. Secure Hose A to the front cover drain tap with a red hose
clamp.
3. Route Hose A to the rear right (down) side panel grommet
holes.
4. Cut ¹⁄₄" (6.4 cm) from the end of the drain port on the
externally mounted rubber elbow. Discard cut portion.
5. Insert Tube 1 into the rubber elbow drain port and secure with
a red hose clamp.
NOTE: Angle tube outward toward front of furnace.
6. Cut 17³⁄₄" (45.1 cm) from the long end of Hose B. Discard cut
portion.
7. Secure the remaining end of Hose B to exposed end of Tube
1 with a green hose clamp.
B
C
D
E
F
G
H
K
J
I
G. Hose B
H. Side panel grommet holes
I. Drain trap
J. Tubes 2
K. Hose A
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