Single Stage Multi Position Furnace
Service Manual
40
440 08 2001 02
Horizontal Left Installations (Single Pipe & Direct Vent N9MP1 & N9MP2--A2 Models)
dwg 25--23--58
Figure 48
Horizontal Trap Connection
Preassemble
and insert
into furnace
“Clamp ears”
Pointed OUT
NOTE: TRAP MUST BE PRIMED BEFORE OPERATION
AIR
FLOW
Pressure Switch, Transition
Pressure Switch Hose, Transition
Some Models have
one pressure switch
Vent Pipe
Vent Pipe Grommet
Ex
ha
us
t
Vent Fitting & Clamps
Return
Air
Pressure Switch Hose, Blower
Transition Box
Pressure Switch, Blower
Plastic Caps
Supply
Air
Inlet
Combustion
Air Pipe,
N9MP2 ONLY
Combustion Blower
Mounting Screws (4)
Combustion Blower
(Rotate 180
°°°°
for Right Side)
3
/
4
²²²²
Hose & Clamps
5
/
8
²²²²
Hose & Clamps
Plastic Cap
Drain Line
Condensate
Trap & Gasket
Yellow Plastic Cap
Horizontal Left Installations - (Single Pipe & Direct Vent N9MP1 & N9MP2 Models)
(See Figure 48)
Note:
For easier installation of the drain hoses and clamps to the
condensate trap, follow the directions outlined below except do not
make any clamp connections to any of the drain stubs and hoses
until the hose routing and lengths have been determined. Remove
the condensate trap and drain hoses from the furnace and secure
the drain hoses to the drain stubs on the trap with the hose clamps
(position the clamps as shown in
Figure 48).
Install the condensate
trap/hose assembly to the furnace casing. Hook one side of the
“clamp ears” on the drain stub through the hole in the casing and
push the condensate trap into position. Secure with the two screws.
Reconnect the drain hoses to the stubs on the vent fitting and the
plastic transition and secure with the clamps.
Relocate the plastic caps and clamps on the condensate drain trap
from the vertical drain stubs to the horizontal drain stubs. Secure the
clamps tightly to prevent condensate leakage.
Mount the condensate drain trap in a vertical position to the left side
of the furnace using the two screws and gasket that are provided.
Note: The condensate trap will be located under the furnace in a ver-
tical position when the furnace is placed horizontally on the left side.
If needed, remove the hole plugs from the furnace side panel and
relocated to the open set of holes in the opposite side panel.
NOTE: All gaskets and seals must be in place for sealed combus-
tion applications.
Relocate the combustion blower on the plastic transition box. Re-
move the four(4) screws that secure the blower to the transition box.
Rotate the blower 180
°
so the blower snout is pointing up and se-
cure with the four(4) screws. Use caution to not over tighten the
screws to prevent stripping out of the plastic mounting holes.
Ensure that the vent fitting is securely attached to the combustion
blower using the rubber coupling and clamps.
NOTE:
The vent fitting
MUST
be installed with the airflow marking
arrow pointed toward the vent pipe.
Plug the left drain stub on the vent fitting with the yellow plastic cap.
Connect the
3
/
4
²
OD rubber hose with the 90
°
bend to the large drain
stub on the condensate trap and secure with a
3
/
4
²
clamp.
Route the hose to the drain stub on the bottom of the plastic transi-
tion box. Cut off excess hose and discard. Connect the hose to the
drain stub on the transition and secure with a
3
/
4
²
clamp.
Connect the
5
/
8
²
OD rubber hose with the 90
°
bend to the right drain
stub on the vent fitting and secure with a
5
/
8
²
clamp.
Route the hose to the smaller drain stub on the condensate trap. Cut
off excess hose and discard. Connect the hose to the drain stub on
the vent fitting and secure with a
5
/
8
²
clamp.
NOTE:
Ensure hoses maintain a downward slope to the conden-
sate trap with no kinking or binding for proper condensate drainage.
