Specifications

22
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Specifications are subject to change without notice
Elbow Tube Black Rubber
1
/
2

(12.7mm) ID & Clamps (Loose
Parts Bag)
AIR
FLOW
OFF
ON
AIR
FLOW
Figure 14
Downflow Left−Side Vent and Trap
25−24−69
Single Pressure Switch Detail
Dual Pressure Switch
Tee Trap White PVC
(loose parts bag)
Flexible Tubing Connector,
3
/
16

(4.8mm) OD (loose parts bag)
EXHAUST
Cut Here
Drain Tube Black,
5
/
8
 (15.9mm) ID
Corrugated Cut at straight section
Leave room for clamp
WARNING
Move Caps to
top of trap
Relief Tube, Extension Black
Rubber,
3
/
16
 (4.8mm) ID Cut to
fit (loose parts bag)
INLET
On Some Models
ONLY
Either: The PVC
Drain Tee or a field
supplied 2
(50.8mm) PVC Tee
Plastic Cap
Yellow or black
Vent Drain
& Clamps
Rotate downward
5 to 10
NOTE: Built-in channel will
be angled 5° to 10° also.
SIDE VIEW
Coupling & Clamps
(Optional)
Trap Connection
“Clamp ears”
Pointed OUT
Preassemble &
insert into furnace
2 (50.8mm) PVC
Coupling
Relief Tube Black Rub
ber
3
/
16
 (4.8mm) ID
Drain Tube
Black Rubber
1
/
2

(12.7mm) ID & Clamps
Barbed Coupling
1
/
2
 (12.7mm)
OD (loose parts bag)
Representative drawing only, some models may vary in appearance.
Alternate
INLET*
* Combustion air pipe (either side) for N9MP2, N9MPD & *9MPD downflow installation
Downflow Left−Side Vent and Trap (See Figure 14)
Remove the inducer mounting screws, rotate the inducer 180°
and retighten the inducer screws to 20″ pounds torque.
Disconnect the hoses from the trap assembly, and remove trap
and trap mounting bracket from the blower compartment. Using
cover plate and gasket provided in the loose parts bag, cover the
hole from the burner compartment to the blower compartment and
secure with screws.
Move the caps to the top of the trap and mount the trap externally
to the left side of the unit using the two screws provided.
Cut the
5
/
8
″ (15.9mm) ID corrugated hose as shown above and
fasten the 90° bend end to the trap and fasten the straight end to
the transition drain. Secure both connections with clamps.
Reconnect the
1
/
2
″ (12.7mm) ID drain hose from the vent drain to
the trap and secure with a clamp.. In some cases, additional
length will be required for this hose. Use the Black plastic
1
/
2
″
(12.7mm) OD barbed coupling and a suitable section of
1
/
2
″
(12.7mm) ID hose to make the connection. Secure all connections
with clamps
Connect the
3
/
16
″ (4.8mm) ID relief tube from the small port on the
trap to the top port of the transition as shown in the picture. In some
cases, additional hose length will be needed. Use the clear plastic
3
/
16
″ (4.8mm) OD flexible tubing connector and a suitable length
of extra
3
/
16
″ (4.8mm) ID hose to make this connection.
Install the vent pipe grommet into the casing
Cut an appropriate length of 2″ (50.8mm) PVC pipe long , enough
to exit the cabinet and connect the vent drain to either:
• A standard field supplied 2″ (50.8mm) PVC tee (N9MP1 or
N9MP2), or
• A 2″ (50.8mm) PVC coupling fastened onto the drain tee
(N9MPD and *9MPD models)
Install tee trap into bottom section of tee.
Remove knockout from the side of the furnace casing where drain
tube will exit.
Connect the tee trap and the main drain line exiting the casing as
shown in Figure 20.
Note: It is recommended that all PVC piping and fitting
connections be fit up and inspected before final cementing. Both
the external trap and the external tee trap must be primed
before operation. Verify all condensate drain connections are
securely clamped. A coupling and clamps (in loose part bag) may
be installed as shown for future servicing of the vent system.