Noritz N-069M-DV-CA Guide De L'utilisateur Et Manuel D'installation page 148

4) Adjusting the vent terminal length
Combustion and operation problems my result if the vent terminal isn't set to the appropriate length.
The length of the vent terminal must be adjusted
to fit the wall thickness before the installation
is completed.
The red line should be visible.
The red rectangle should not be
visible from the outdoors.
At this point, make sure the
supply and exhaust slide pipes
have been inserted into vent
terminal.
5) Extend the supply and exhaust slide pipes to connect the vent terminal to the water heater.
Make sure the connections are secure and take measures to
prevent exhaust gas from leaking. Use high temperature sealant
if necessary.
(1) Drill a hole (3mm (0.2") dia.) through the water heater
exhaust flue collar to meet with the hole in the exhaust
slide pipe of the vent terminal
(2) Seal connections between the water heater and the
vent terminal with high temperature sealant to ensure
exhaust gas won't leak.
(3) Screw the exhaust slide pipe of the vent terminal to the
flue collar of the water heater using the included tapping
screw.
(4) Cover all of the connections between the water heater
and the vent terminal with the included aluminum
tape.
* Note that the aluminum tape by itself is not sufficient to
make the connection gas tight and prevent the terminal
from becoming disconnected from the water heater.
(5) After completing the installation, perform a test run of
the water heater according to the installation manual.
72
External wall surface
Standard projection
length: 75mm (3")
Intake slide pipe
Exhaust slide pipe
Wind packing along the red rectangle only
for wall thicknesses of 370mm (14.5") to
690mm (27") support products.
Vent terminal
Wing nut
Vent terminal
Intake Exhaust
pipe pipe
Aluminum tape (long)
Remove this screw and slide
out the external cylinder.
Sleeve
Aluminum tape (short)
Tapping screw