Install Instructions

21

Drain the furnace and air conditioning coil if applicable,
in compliance with code requirements. In horizontal or
counterow 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.


Hose #1
Hose #2







4. Install smaller end of hose #3 on 45º elbow and
secure with 1” clamp.
5. Refer to Field Supplied Drain section for instructions
on eld supplied / installed drain on outlet of furnace
trap.

1. Install the 45 degree pipe / hose drain coupling
from the outside of the cabinet (barbed end goes in
the cabinet) through the hole in the left 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 “B” line for
a 17.5” cabinet; cut at line “C” for a 21” cabinet; do
not cut for a “D” width cabinet.
3. Install large end of hose #3 to trap outlet and secure
with 1.25” clamp.
4. Install smaller end of hose #3 on 45º elbow and
secure with 1” clamp.
5. Refer to Field Supplied Drain section for instructions
on eld supplied / installed drain on outlet of furnace
trap.
Hose #11
Hose #2





1. Remove the clamps from both ends of the drain
hoses.
2. Remove the two screws holding the drain trap to the
blower deck.
3. Remove the trap and two hoses from the blower
deck
4. Remove the two plugs from the right side of the
cabinet and install them in the blower deck.
5. (Draining the Vent Elbow ) Locate hose #2 (factory
installed) and cut 1” away from the 45 degree bend,
discard the 45 degree section. Insert hose #2 from
outside the cabinet through the cabinet drain hole
nearest the top, secure it to the barbed tting in the
elbow with a red clamp.