Two- Stage Multi Position Furnace
Service Manual
29
440 08 2002 02
Combustion Blower
Mounting Screws
(4)
Figure 40
Horizontal Left Installations (Dual Certified *9MPT & *9MPV(A1) Models)
Supply
Air
Ex
ha
us
t
Inle
t
Vent Pipe
Vent Pipe
Grommet
Vent Fitting
& Clamps
Rubber
Plug
Drain Line
90
°°°°
Elbow
Plastic Caps
Rubber Coupling
& Clamps
5
/
8
²²²²
Hose & Clamps
Combustion Air Pipe, (optional)
Air Intake Coupling
Combustion
Blower
Pressure Switch Hose,
Transition
Pressure Switch,
Transition (Lo Fire)
3
/
4
²²²²
Hose & Clamps
Condensate
Trap & Gasket
dwg 25--23--54a
Return
Air
Plastic Caps
Transition Box
Gas Pipe
Grommet
Pressure Switch Hose,
Blower
Pressure Switch,
Blower (Hi Fire)
DRAIN SIDE VIEW
Rotate downward
20
°
to 30
°
Horizontal Left Installations - (Dual Certified *9MPT & *9MPV
)
(See Figure 40)
Relocate the plastic caps and clamps on the condensate drain trap
from the vertical drain stub 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
relocate to the open set of holes in the opposite side panel. Drill two
7
/
64
²
diameter holes in the casing using the condensate trap as the
template.
Ensure that the vent fitting and the 90
°
elbow is securely attached to
the combustion blower.
NOTE:
The vent fitting
MUST
be installed with the airflow marking
arrow pointed toward the vent pipe, with the drain stub at a 20
°
to 30
°
downward slope.
Plug the upper drain stub on the vent fitting with the rubber plug. Use
a blunt pointed screwdriver to push the plug into the stub.
Connect the
3
/
4
²
OD rubber hose with the 90
°
bend to the drain stub
on the bottom of the plastic transition box and secure with a
3
/
4
²
clamp.
Route the hose to the large drain stub on the condensate trap. Cut
off excess hose and discard. Connect the hose to the drain stub on
the trap and secure with a
3
/
4
²
clamp.
Connect the
5
/
8
²
OD rubber hose with the 90
°
bend to the small drain
stub on the trap and secure with a
5
/
8
²
clamp.
Route the hose to the lower drain stub on the vent fitting. Cut off ex-
cess 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.