International comfort products N9MP1 Installation Instructions Manual page 19

Figure 11 Upflow Installations Top Vent
Plastic Caps (2)
Yellow or black
Vent Drain
& Clamps
Dual Pressure Switch Detail
Drain Connector Black PVC
, (18.1mm) PVC X
3
/
4
(12.7mm) CPVC (Loose
parts bag)
Casing Grommet
Black Rubber
, (15.9mm) ID
5
/
8
(Loose parts bag)
Drain Line Vent Tee
(18.1mm) PVC or
CPVC (Field supplied)
Upflow Installations Top Vent
Remove knockout from the side of the furnace casing where drain
tube will exit.
Install casing grommet [black rubber
in loose parts bag].
1
Install the / " (12.7mm) CPVC street elbow on discharge of trap
2
Install the black PVC tube connector [
(12.7mm) CPVC from loose parts bag] as shown in the illustration
above.
5
Cut the black drain tube [ / " (15.9mm) ID − in loose parts bag] to
8
length to fit between trap and tube connector through grommet.
Clamp both ends of the drain tube using clamps provided.
NOTE: "PVC" is used as a generic term. Pipe and fitting materials used must be acceptable to the local code officials having
jurisdiction.
440 01 1024 04
Coupling & Clamps
(Optional)
Drain Tee
Drain Tube
Black Rubber
, (12.7mm) ID &
1
/
2
Clamps
Drain Tube
Corrugated
, (15.9mm) ID &
5
/
8
Clamps
,
1
/
2
,
3
/
4
, (12.7mm)
1
/
2
Representative drawing only, some models may vary in appearance.
(See Figure 11)
5
/ " (15.9mm) ID grommet −
8
3
/ " (18.1mm) PVC x
4
Specifications are subject to change without notice
V E
NT
ON
OFF
, (15.9mm) ID &
5
Drain Tube Black Rubber /
8
Clamps, Cut length to fit (Loose parts bag)
Glue the CPVC street elbow to the trap using appropriate cleaner
and solvent cement.
3
The field supplied
drain line vent tee must vent outside the furnace cabinet (see
exploded view above).
Note: It is recommended that all PVC piping and fitting
1
/ "
2
connections be fit up and inspected before final cementing. 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.
On Some Models ONLY
Single Pressure Switch
Relief Tube
Black Rubber
(4.8mm) ID
Street Elbow
, CPVC
1
/
2
(Loose parts bag)
25−24−80
1
/ " (18.1mm) PVC or / " (12.7mm) CPVC
4 2
,
3
/
16
19