20
#
3
#1
#2
#4
#5
#
6
#7
#8
#9
#10
#11
100 Degree
Elbow
Coupling
Drain components shown for information purposes
only. For horizontal installations, a Horizontal Drain kit may
number.
All furnace models come with a factory installed drain trap.
For vertical installations, the trap will remain in the factory
position except for a counterow when the installer desires
the drain to exit the right side. All furnace models installed
horizontally require the trap to be relocated. Many drain
hoses have a built–in grommet which will provide a cabinet
seal when installed. See instructions below for your model
and installation position.
Side Cut-Out
12”
3”
Right side shown.
Acceptable
area for
drain hole.
Drain the furnace and air conditioning coil if applicable,
in compliance with code requirements. In horizontal or
counterow installations, a eld installed rubber coupling
will allow the drain trap to be removed for cleaning. The
drain trap must be primed before initial furnace start up.
When an air conditioning coil drain is connected to the
eld supplied furnace drain, it must be vented. An open
tee must be installed at a height no higher than the bottom
of the furnace collector box to prevent air conditioning
condensate from backing up into the furnace, if the
common drain was blocked.
The trap and factory installed hoses remain as shipped.
The furnace drain may exit either the right or left side of
the furnace cabinet. Both sides of the cabinet have two
.875” diameter holes which can be used interchangeably
for drain and low voltage wiring purposes. If a higher drain
exit is needed, a .875” diameter hole may be added in the
area shown in Figure 24. Any unused cabinet opening
must be sealed. Do not allow drain hose to sag or trap
water.
1. Locate and Install the 45º pipe / hose drain coupling
from the outside of the cabinet (barbed end goes
in the cabinet) through hole in the right side of the
cabinet and secure with two eld supplied #8 self-
tapping screws (see Figure 24).
2. Locate the long drain hose #3 and cut at line “A” .
3. Install large end of hose #3 to trap outlet and secure
with 1.25” clamp.
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