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24 Rinnai Corporation EX17C / EX22C Manual
Extension Kit Installation
• Extension lines are through the side panel of the
appliance.
• It is not possible to position the extension lines
through the other side panel of the appliance.
• One elbow is shown. One additional elbow may be
added.
• Instructions (1)-(6) must be followed.
Plastic Tie
Air Intake Hose
Exhaust Line
Pipe
Stopper A
Pipe Clamp
• Extension lines are through the top panel of the
appliance above where the exhaust exits the appli-
ance.
• No elbows are shown. Two additional elbows may
be added.
• Instructions (1)-(6) must be followed.
Plastic Tie
Exhaust Line
Pipe Stopper A
Pipe Clamp
Air Intake Hose
If necessary, extension kits are available to extend the
exhaust line and air intake hose between the manifold
and the appliance.
(1) The maximum vent length is 13 feet (4 m) with 2
bends. The bent pipe attached to the appliance
does not count toward the max limit of 2 bends.
(2) Maximum vertical length allowed is 10 feet (3 m).
(3) If the extension is longer than 10 feet (3 m), the
condensate may overflow the condensation pan.
Therefore, extension exceeding this length should
drain to the outside and sloped 3° downward.
(4) Do not allow any low points or sagging in the
exhaust line. Otherwise, condensate may block
the exhaust and affect combustion.
(5) Vent extensions installed in unconditioned air
space must be insulated with high temperature
insulation and must be accessible.
(6) Vent extensions must not be concealed per NFPA
54 and must be accessible allowing inspection and
repair. Decorative covers are available from
Rinnai.
These figures show the 2 possible ways that the
extension exhaust line and air intake hose may be
directed away from the appliance. All views are from
behind the appliance. For your configuration,
position the air intake hose as shown.
INCORRECT
• Too many bends (limit is 2)
• Air intake hose is above
exhaust pipe