Navien NPE-180A2 Installation Manual page 82

1. Measure 1- / " from the end of the vent pipe,
1
2
then draw a mark at that distance.
1- /
Mark 1
2
the end of the pipe
2. Insert the vent pipe into the vent collar to start
the vent run. Make sure to completely slide the
vent into the collar until the end makes contact
with the bottom of the socket.
Verify that 1-1/2" of the pipe has been
Note
completely inserted into the collar and
that the mark is no longer visible.
3. Tighten the clamp with a socket wrench (8 mm)
to properly seal the joint.
82 Installing a Common Vent System
"
from
1- / "
1
2
WARNING
NEVER start the vent run with a street elbow
at the vent collar to prevent serious injury or
death. Using an elbow directly at the collar will
not allow for a tight seal between the appliance
and the vent pipe.
ALWAYS use a length of straight pipe when
starting the vent run.
The length of the vent pipe from the
Note
unit to the common vent main trunk
pipe must not exceed 16' of equivalent
length.
6.3.3 Assembling the Wye Joint
1. Assemble the hub wye, the 2" reducer, and the
90º elbow into the common vent. You can also
use the hub reducing wye and the 90º elbow to
assemble the common vent. Apply the proper
solvent cement to the mating surfaces.
Tees can also be used instead of wye
Note
fittings as part of the common vent.
Apply Cement
Apply Cement
[Hub Wye, 2" Reducer, 90˚ Elbow]
Apply Cement
[Hub Reducing Wye and 90˚ Elbow]