95
Installing a Common Vent System
9.3.2 Connecting the Pipe to the
Common Vent Collar Kit
WARNING
When cutting the vent pipe, ensure that the
cutting plane of the pipe is at a 90° angle with
the pipe axis and is as flat as possible. Vent
pipes with a beveled cutting plane can lead to
gasket failure and flue gas leakage, which may
result in serious injury or death.
90 C
90°
Note
Do not use primer or cement on the
appliance connection.
1. Measure 1-
1
/
2
” from the end of the vent pipe,
then draw a mark at that distance.
Mark 1-1/2” from
the end of the pipe
1-1/2”
4. Tighten the four mounting screws to secure the
Common Vent Collar Kit in place. The screws (x
4) are supplied with the Common Vent Collar Kit.
WARNING
If the original vent collar must be repaired or
reassembled, ensure that it is tightened by
using the 4 provided screws.
5. Remove the front cover of the boiler, and
connect the provided VID jumper wire as shown
below. You must connect it to the wire with the
“VID” label.
Note
The Damper includes a VID jumper
wire.
VID
Summary of Contents for NFC-250/175H
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