Condensate (Indoor Models Only); Checklist For Ven Ng And Condensate (Indoor Models Only) - Rinnai ru80i Installation And Operation Manual

Condensate
(indoor models only)
Condensate forma on can occur in high efficiency
direct vent appliances. Without proper drainage
condensate will damage the heat exchanger.
To prevent condensate damage follow these
instruc ons.
DO NOT
Do not connect the condensate drain pipe directly
to the rain sewer.
Do not connect the condensate drain line with an
air condi oning evaporator coil drain.
MUST DO
Use only vent that is approved and iden fied as
acceptable for your par cular model.
Slope the ven ng toward the appliance according
to the vent manufacturers installa on instruc ons.
All condensate must drain and be disposed of
according to local codes.
Use only corrosion resistant materials for the
condensate drain lines such as PVC pipe or plas c
hose.
The condensate drain pipe (along its en re length)
must be at least the same diameter as the drain
line, (1/2 inch NPT).
The end of the condensate drain pipe should be
open to the atmosphere. The end should not be
under water or other substances.
To minimize freezing of the condensate, run the
condensate drain line through an interior wall or
between insula on and an interior wall.
INFORMATION
Water heaters have an integrated condensate
collector.
Regions of cold climate will create more
condensate in the vent system. The condensate
collector should be used in cold climates.
The condensate drain pipe should be as short as
possible and have a downward pitch.
If the condensate drain gets blocked, an diagnos c
code will display on the controller. If this occurs,
the condensate drain must be cleaned.
The condensate trap will automa cally prime (self-
prime) during opera on of the unit as condensate
forms. Condensate draining from the unit
indicates that the trap is full and that there is no
blockage in the condensate drain. It is not
necessary to add water to the condensate trap.
A condensate neutralizer kit, 804000074, is
available from Rinnai. The kit allows condensate
to flow through neutralizing media that raises the
pH of the condensate to a level that will help
prevent corrosion of the drain and public sewer
system.
Checklist for Ven ng and

Condensate (indoor models only)

□
Verify proper clearances around the vents and air
intakes.
□
Ensure you have used the correct ven ng
products for the model installed and that you
have completely followed the ven ng
manufacturer's installa on instruc ons and these
installa on instruc ons.
□
Verify that the vent system does not exceed the
maximum length for the number of elbows used.
KB Series Manual 37