Rinnai Commercial Hybrid System Installation and Operation Manual
39
Condensate can form in the vent of high efficiency
direct vent appliances. Without proper drainage,
condensate will damage the heat exchanger.
To prevent condensate damage, follow these
instructions.
DO NOT
•
Do not connect the condensate drain pipe directly
to the rain sewer.
•
Do not connect the condensate drain line with an
air conditioning evaporator coil drain.
•
Do not pipe condensate drain, temperature
-
pressure relief valve, and/or pressure relief valve
together into a common pipe.
MUST DO
•
Use only venting that is approved and identified as
acceptable for your particular model.
•
Slope the venting toward the appliance according
to the vent manufacturer
’
s installation
instructions.
•
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 plastic
hose.
•
The condensate drain pipe (along its entire 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 insulation and an interior wall.
•
Ensure that condensate drain, PRV, and T & P are
piped separately to their own dedicated drain
lines.
INFORMATION
•
Water heaters have an integrated condensate
collector.
•
The condensate drain pipe should be as short as
possible and have a downward pitch.
•
If the condensate drain gets blocked, a diagnostic
code will display on the controller. If this occurs,
the condensate drain must be cleaned.
•
The condensate trap will automatically prime (self
-
prime) during operation 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.
Condensate
