Rinnai EX38DT Installation And Operation Manual page 23

Instructions:
CAUTION
Use the pipe stoppers, connectors, clamps,
and screws according to these instructions in
order to ensure no leakage of exhaust gases.
1. Install the Clamps:
Both the exhaust line and air intake hose
are supported by clamps which are attached
to the wall. A wall fixture can be used to
offset the clamp from the wall. Use Screw B
to attach the wall fixture to the wall. If the
wall fixture is not used then use Screw A
and the nut to attach the clamp to the wall.
The air intake hose should always be
underneath the exhaust line so that in case
the air line sags it will not come into contact
with the exhaust line.
Exhaust pipe
Air intake hose
Figure 24
2. Install the Exhaust Line:
The exhaust line is connected between the
bent pipe at the rear of the furnace and the
exhaust port on the flue manifold.

To connect exhaust pipes with other
straight pipes or bends, fit the male end
into the female end. Use pipe stopper A
to clamp the connection.

Use pipe stopper B to fix the length on
the adjustable exhaust pipes. Do not
extend these pipes beyond the red line.

Do not cut the exhaust pipe. Use the
adjustable pipes if necessary.

To bend the elbow, insert exhaust pipes
into both ends for additional leverage.
Bend to desired angle.

Do not straighten the bent pipe attached
to the furnace.
EX38DT Installation and Operation Manual
Exhaust pipe
Air intake hose
Female end
Male end
Adjust the angle
Figure 25
3. Connect the Air Intake Hose:
The air intake hose is connected between
the air connection at the rear of the furnace
and the air intake port on the flue manifold.
Push the air intake hose onto the flue
manifold and secure with the plastic cable
tie.
Join air intake hoses by screwing the hose
joint half of its length into the air intake hose
and then screwing another air intake hose
into the hose joint.
The lengths of the air intake hose and the
exhaust pipe must be the same in order for
the furnace to operate properly. The hose
can be cut to the required length. Deburr all
rough edges. Do not cut the hose attached to
the furnace.
Support the air intake hose with pipe clamps.
Hose joint
Figure 26
NOTE
Do not cut the intake hose. Cutting the
intake hose may result in noise.
Pipe stopper B
Pipe stopper A
Air intake hoses
23