Installation Sheet

28 Rinnai Tankless Water Heater Installaon and Operaon Manual
If venng through an exterior wall, align the wall mounng
bracket template (located in literature bag) to the wall and
follow the instrucons on the template for appropriate
vent hole locaon. Use a level to make sure the wall
mounng bracket is even and level.
Remove and discard screw from
concentric ue connecon.
Remove exhaust adapter ring (discard for
concentric venng conguraons).
Concentric
Vent
Install the concentric vent. Ensure it
is properly seated.
Secure the vent pipe to the concentric ue
connecon with the supplied screw.
Concentric Vent Maximum Equivalent Length
Vent Sizes 2 in. X 4 in. 3 in. X 5 in.
Vent Lengths
65  (20 m) 150  (46 m)
• 45° elbow is equivalent to 3  (1 m)
• 90° elbow is equivalent to 6  (2 m)
Concentric Pipe Installaon Instrucons
Important: Install the venng terminaon according to the diagrams and instrucons in
this manual. Slope the venting 1/4 in. per foot toward the appliance according to the vent
manufacturer’s installation instructions. Dispose of condensate per local codes.
Concentric Pipe Example Vent Applicaons
Horizontal Wall Terminaons
2 in. x 4 in.
3 in. x 5 in.
Vercal Roof
Terminaons
2 in. x 4 in.
and
3 in. x 5 in.
Concentric Pipe Maximum Vent Length
Direct Vent (Concentric Pipe)
1
2
3
1
4
Mount Concentric Pipe Through Wall
Wall Mounng
Bracket Template
Level
Wall Mounng
Bracket
SAMPLE
Illustrative Purposes Only