Adaptor Installation; 3: Wall Support Eccentric Increaser - Rinnai RU80i Manual

Adaptor Installation

For installation in Canada, field-supplied PVC/CPVC
used for combustion venting must comply with CAN/
CGA B149.1 (latest edition) and be certified to Type
BH Gas Venting Systems, ULC-S636.
Components of any certified system CANNOT be
substituted with any other vent system(s) or unlisted
pipes and/or fittings. All listed components, primers
and glues are part of the certified vent system and
therefore MUST be from a single manufacturer.
When installing the Ubbink adaptor with the twin
pipe PVC/CPVC system:

Install the system in according to Ubbink/Rolux,
and Rinnai Installation Instructions.

Use the 3"/5" Concentric to Twin pipe Adaptor
with 3" or 4" diameter PVC/CPVC venting only.

It is the responsibility of the installer to follow all
national codes, standards and local ordinances,
in addition to instructions laid out in this manual
for vent/intake clearances and other safety
requirements.

If venting conflicts arise between this guide and
the respective OEM's manual, the
manufactures' installation instruction will take
precedence providing they meet the intent of all
national codes, standards and local ordinances
having jurisdiction. Follow this guide
together with applicable codes, standards and/or
ordinances for installation of the intake/vent
pipe(s) and all other applicable water heater
installation procedures.
WARNING
Current codes prohibit the application of external
insulation on plastic vent pipe together with the use
of cellular core PVC, CPVC, and Radel as venting
materials.
PVC/CPVC Twin Pipe Adaptor Installation
Instructions:
The vent size (diameter) and maximum vent lengths
must be followed as detailed in the installation
Instructions supplied with the appliance and as stated
in Tables 4-7 of this document. Thoroughly read and
understand the venting section of the appliance
manual before proceeding with the following steps
outlined in this guide.
NOTICE
STEP 1:
Carefully read and understand the venting section of
the Installation Instructions supplied with the water
heater prior to determining a suitable location for the
water heater and vent termination. Locate water heater
to have the straightest (shortest) practical vent length
to outside. Measure the total venting distance required
to reach the outside wall or roof. Determine the
diameter of venting components to be used based on
required vent length (refer to vent tables in tankless
water heater manual or Tables 4-7 of this document).
STEP 2:
Before installing the concentric to twin pipe adaptor,
inspect each vent component for damage making sure
the gaskets for each component are undamaged. Do
not attempt to install or repair damaged components. If
a gasket is damaged, these are available through
Rinnai and its distributors. Do not use gaskets from
another manufacturer.
STEP 3:
Adaptor vent pipe MUST be securely fastened to
structure, at the eccentric increaser or as close as
possible thereafter (Figure 3). Straps to be field
supplied. Use straps, clamps or other fasteners that
will not score or damage pipes and be acceptable by
local codes.
Securing Strap
Eccentric
Increaser
Figure 3: Wall support for Eccentric Increaser
12