Rinnai RHFE-431WTA Owner's Operation And Installation Manual page 60

I TYPES COMPATIBLE WITH EXTENSION SET
INSTALLING AN EXTENSION KIT
Installing an extension kit requires construction of an air line and the exhaust line. The air line is connected
between the Air Supply Elbow at the rear of the heater and the air inlet port on the Flue pipe.
Similarly, the exhaust line is connected between the joint pipe at the rear of the heater, and the exhaust
port on the Flue pipe.
Caution: Check to see there is no debris in pipe or hose.
I HOW TO INSTALL
Example:Using 2 sets of extension set and 1 bent set.
Pipe stopper A
Pipe stopper B
Hose joint
Air intake elbow
(comes with main unit)
Vent manifold
(comes with main unit)
Hose joint
Air intake hose
1. How to connect exhaust pipes
To connect the exhaust pipes, fit the male end into the female end and clamp with pipe stopper A to prevent
slipping. The exhaust pipe can be telescoped to the required length; do not cut it.
Pipe stopper A
Bent elbow
Pipe stopper A
Pipe stopper B
Exhaust pipe
Pipe stopper A
Pipe stopper B
Exhaust pipe
Male end
Female end
Pipe stopper B
Female end
Connect bent pipe
Example:Using 80 inches slide pipe set.
Vent manifold
(comes with main unit)
Air intake elbow
(comes with main unit)
Pipe clamp
Pipe clamp Pipe clamp
Pipe clamp
Pipe clamp
Hose joint
Air intake hose
Exhaust pipe
Fit inside
Male end
Female end
Pipe stopper B
Pipe stopper A
Male end
Fit inside
Pipe stopper A
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Pipe stopper A
Pipe stopper B
Exhaust pipe
Pipe stopper A
40 inch straight pipe
Pipe stopper A
Pipe stopper B