Installation manual

Rinnai Corporation ES17 / ES22 Manual 23
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) Maximum vent length allowed is 13 feet (4 m).
(2) Maximum vertical length allowed is 8 feet (2.4 m).
(3) Any length (horizontal and vertical) in excess of 8
feet (2.4 m) must be sloped 3° downward toward
the flue manifold to allow condensate to drain to
the outside.
(4) Do not allow any low points in the exhaust line
where condensate will collect.
(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.
Horizontal extension on left side
Exhaust pipe
Air intake hose
Pipe stopper A
Pipe clamp B
Pipe stopper B
Exhaust pipe:
Install so that
the exhaust
pipe slopes
back to the unit.
Termination
side
Do not allow contact between the air intake hose and exhaust pipe.
Vertical extension on left side
Vertical extension on right side
These figures show the 3 possible ways that the ex-
tension exhaust line and air intake hose may be di-
rected away from the appliance. All 3 views are from
behind the appliance.
For your configuration, position the air intake hose
as shown.