Extension Kit Installation
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 3 possible ways that the extension exhaust line and air intake hose may be directed away from the appliance. All 3 views are from behind the appliance. For your configuration, position the air intake hose as shown.
24 | Rinnai Corporation EX17C / EX22C Manual |
INCORRECT
•Too many bends (limit is 2)
•Air intake hose is above exhaust pipe
Exhaust Line
Pipe Stopper A
Pipe Clamp
Air Intake Hose
Plastic Tie