24
440 01 1024 01
Specifications are subject to change without notice
AIR FLOW
IN
ON
OFF
V
E
N
T
Figure 17
Horizontal Left--Side Vent
Relief Tube Black Rubber
3
/
16
″
ID
25--24--88
Single Pressure Switch Detail
Dual Pressure Switch
Tee Trap White PVC
(loose parts bag)
WARNING
Move Caps to top of trap
Flexible Tubing Connector
3
/
16
″
OD (Loose Parts Bag)
Elbow Tube Black Rubber
1
/
2
″
ID & Clamps
(Loose Parts Bag)
EXHAUS
T
Alternate Orientation
Field
Supplied Tee
Cut Here
Cut at straight section
Leave room for clamp
Relief Tube Extension
Black Rubber
3
/
16
″
ID Cut to Fit
(Loose Parts Bag)
Yellow or black
Plastic Cap
Vent Drain
& Clamps
Level or Sloped towards Tee
INL
ET
On Some
Models ONLY
Drain Tube Black,
5
/
8
″
ID Corrugated
Drain Tube Black Rubber
1
/
2
″
ID & Clamps
Barbed Coupling
1
/
2
″
OD (Loose Parts Bag)
Representative drawing only, some models may vary in appearance.
Remove KO before
mounting Trap
Horizontal Left--Side Vent
(See Figure 17)
Remove the drain tee from the Vent Drain if installed (N9MPD and
*9MPD models only)
Rotate the inducer 180
°
for a side vent after loosening the 4
inducer attachment screws. Reinstall 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.
Remove knockout from the side of the furnace casing where drain
tube will exit.
Mount the trap externally to the bottom side of the unit using the
2 screws provided in the location shown.
Cut the corrugated tube as shown in the illustration above.
Connect the corrugated hose from the transition to the trap.
Secure connections with clamps.
Connect the black
1
/
2
″
ID drain tube from the Vent Drain to the trap.
If an extension is required, use the black
1
/
2
″
OD flexible tubing
connector and the black
1
/
2
″
ID drain tube in the loose parts bag.
Cut tube to length. Secure connections with clamps.
Connect the
3
/
16
″
ID relief tube to the middle port on the trap. If an
extension is required, use the
3
/
16
″
OD flexible tubing connector
and the black
3
/
16
″
ID relief tube in the loose parts bag. Cut tube
to length.
Cut an appropriate length of 2
″
PVC pipe, fittings and extension
pipe long enough to exit the cabinet and connect the vent drain to
either:
•
A standard field supplied 2
″
PVC tee (N9MP1 models), or
•
A 2
″
PVC coupling fastened onto the drain tee (N9MPD and
*9MPD models)
Install tee trap into bottom section of tee.
Important: The pipe to the tee trap must be level or sloping towards
the tee trap
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.