21
Installer selects right or left side drain
and installs this hose accordingly.
Hose #1
Hose #2
45 degree
barb-pipe
adapter
45 degree
barb-pipe
adapter
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.
Minimum 5 1/2” clearance is required for the drain trap
beneath the furnace.
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.
6. For models *MSS920403AN and *MSS960403AN;
locate the hose #2 (factory installed) and cut 1.5
length from the end of the hose. Insert hose #2 from
outside the cabinet through the cabinet’s drain hole
nearest to the top. Secure it to the barbed tting in
the elbow with a red clamp.
7. (Draining the Collector Box) Install the non-grommet
end of hose #11 from outside the cabinet in the
bottom drain hole. Install on collector box and
secure with a silver clamp.
8. Use two silver clamps and secure the hoses to drain
trap. The trap outlet faces the front of the furnace.
Secure the trap to the cabinet using two screws
removed in step 2 by inserting the two screws
through the large set of holes in the top mounting
tabs of the trap into the two pre-drilled holes in the
side of the cabinet.
9. Refer to Field Supplied Drain section for instructions
on eld supplied / installed drain on outlet of furnace
trap.