Venting Guidelines - Rinnai CHS199100 Installation And Operation Manual

Venting Guidelines

DO NOT

Do not use cellular core PVC/CPVC.

Do not use Radel, ABS, or galvanized material to
vent this appliance.

Do not cover non-metallic vent pipe and fittings
with thermal insulation.

Do not combine vent components from different
manufacturers.

Vent diameter must not be reduced.

Do not connect the venting system with an
existing vent or chimney.

Do not common vent with the vent pipe of any
other manufacturer's water heater or appliance.
Rinnai water heaters can only be common vented
using a Rinnai certified common vent system.
MUST DO

This water heater is a direct vent water heater and
therefore is certified and listed with the vent
system. You must use vent components that are
certified and listed with the water heater model.

The vent system must vent directly to the outside
of the building and use outside air for combustion.
Exceptions:
- Approved Rinnai Common Vent Applications
- Commercial Hybrid System Applications

Avoid dips or sags in horizontal vent runs by
installing supports per the vent manufacturer's
instructions.

Support horizontal vent runs every four feet and
all vertical vent runs every six feet or in
accordance with local codes.

Venting should be as direct as possible with a
minimum number of pipe fittings.

Vent connections must be firmly pressed together
so that the gaskets form an air tight seal.

The vent piece connected to the water heater
must be secured with one self-tapping screw.
INFORMATION

Refer to the instructions of the vent system
manufacturer for component assembly
instructions.
12
NOTICE
If it becomes necessary to access an enclosed vent
system for service or repairs, Rinnai is not responsible
for any costs or difficulties in accessing the vent
system. The warranty does not cover obtaining
access to a vent system in an enclosed environment.

If the vent system is to be enclosed, it is suggested
that the design of the enclosure shall permit
inspection of the vent system. The design of such
enclosure shall be deemed acceptable by the
installer or the local inspector.
Commercial Hybrid System