Specifications

24
440 01 1024 04
Specifications are subject to change without notice
AIR
FLOW
OFF
ON
Figure 16
Horizontal Left through Top
Plastic Caps
Yellow or black
Vent Drain
& Clamps
Trap Connection
“Clamp ears”
Pointed OUT
Preassemble &
insert into furnace
25−24−70
Single Pressure Switch Detail
Dual Pressure Switch
Tee Trap White PVC
(loose parts bag)
Cap and Clamp
Open End
Flexible tubing connector
3
/
16
 (4.8mm) OD (Loose
Parts Bag)
EXHAUST
Alternate Orientation
Field
Supplied Tee
Cut Here
Cut at straight section
Leave room for clamp
Relief Tube Extension
Black Rubber
3
/
16
 (4.8mm) ID
Cut to Fit (Loose Parts Bag)
AIR FLOW
Coupling & Clamps
(Optional)
Relief Tube Black Rubber
3
/
16
 (4.8mm) ID
Drain Tube
Black Rubber
1
/
2
 (12.7mm) ID
& Clamps
Drain Tube Corrugated
5
/
8
 (15.9mm) ID & Clamps
Representative drawing only, some models may vary in appearance.
Remove KO before
mounting Trap
Horizontal Left through Top (See Figure 16)
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
two 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.
Remove the black
1
/
2
″ (12.7mm) ID drain tube from the drain tee.
Install a yellow cap and clamp over the open drain port of the drain
tee.
Connect the black
1
/
2
″ (12.7mm) ID drain tube from the Vent Drain
to the trap. Secure connections with clamps.
Connect the
3
/
16
″ (4.8mm) ID relief tube to the middle port on the
trap. If an extension is required, use the
3
/
16
″ (4.8mm) OD flexible
tubing connector and the black
3
/
16
″ (4.8mm) ID relief tube in the
loose parts bag. Cut tube to length. Secure all connections with
clamps.
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 models), or
• A 2″ (50.8mm) PVC coupling fastened onto the drain tee
(N9MPD and *9MPD models)
Install tee trap into bottom section of tee.
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.