International comfort products N9MP1 Installation Instructions Manual page 26

Figure 18
Horizontal Right through Top
Trap Connection
"Clamp ears"
Pointed OUT
Preassemble &
insert into furnace
Relief Tube Black Rub­
, (4.8mm) ID
3
ber /
16
Flexible Tubing Connector
, (4.8mm) OD (Loose
3
/
16
Parts Bag)
Relief Tube Extension
3
Black Rubber /
16
Cut to Fit (Loose Parts Bag)
Horizontal Right through Top
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.
1
Connect the black / " (12.7mm) ID drain tube from the Vent Drain
2
to the trap. If an extension is required, use the black
OD barbed coupling and the black
the loose parts bag. Cut tube to length. Secure connections with
clamps.
26
Single Pressure Switch Detail
WARNING
Add Cap and Clamp
, (4.8mm) ID
Dual Pressure Switch
, (15.9mm) ID &
5
Drain Tube Corrugated /
8
Clamps Cut at straight section
Cut Here
Leave room for clamp
Representative drawing only, some models may vary in appearance.
(See Figure 18)
1
/ " (12.7mm)
2
1
/ " (12.7mm) ID drain tube in
2
Specifications are subject to change without notice
, (4.8mm) ID Rub­
3
/
16
ber Tube
AIR FLOW
Coupling & Clamps
(Optional)
Drain Tube Black
, (12.7mm)
1
Rubber /
2
ID & Clamps
Remove KO before
mounting Trap
3
Connect the / " (4.8mm) ID relief tube to the middle port on the
16
trap. If an extension is required, use the clear
flexible tubing connector and the black
in the loose parts bag. Cut tube to length.
Cut an appropriate length of 2" (50.8mm) PVC pipe, fittings and
extension pipe long enough to exit the cabinet and connect the
vent drain to a standard field supplied 2" (50.8mm) PVC tee
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.
Alternate Orientation
Plastic Cap
Yellow or black
Vent Drain
& Clamps
Tee Trap White PVC
(loose parts bag)
INLET
On Some Models
ONLY
Barbed Coupling
OD (Loose Parts Bag)
Drain Tube Black Rubber
, (12.7mm) ID & Clamps
1
/
2
3
/ " (4.8mm) OD
16
3
/ " (4.8mm) ID relief tube
16
440 01 1024 04
Field
Supplied Tee
, (12.7mm)
1
/
2
25−24−70b