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Andrews FASTflo WH42 Installation Manual, Operation And Maintenance Manual Page 41

Continuous flow wall hung balanced flue heaters for natural gas and lpg.
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4) Adjusting the flue terminal length
Combustion and operation problems my result if the flue terminal isn't set to the appropriate length.
The length of the flue 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 the flue
terminal.
5) Extend the supply and exhaust slide pipes to connect the flue 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 (3.0 dia.) through the water heater
exhaust the flue collar to meet with the hole in the
exhaust slide pipe of the flue terminal.
(2) Seal connections between the water heater and
the flue terminal with high temperature sealant to
ensure exhaust gas won't leak.
(3) Screw the exhaust slide pipe of the flue 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 flue 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.
37
External wall surface
Standard projection
length: 75 mm
Remove this screw and slide
out the external cylinder.
Intake slide pipe
Exhaust slide pipe
Wind packing along the red rectangle
only for wall thicknesses of 370 to
690 mm support products.
Flue Terminal
Wing nut
Flue Terminal
Intake
Exhaust
pipe
pipe
Tapping screw
Aluminum tape (long)
05.10.4, 1:41 PM
Sleeve
Aluminum tape (short)
37

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