Ember Flueing - Rinnai Ember Series Installation Manual

Ember flueing

Every gas fire requires a flue system that will draw effectively and clear
flue products safely under all potential wind and climatic conditions. It
is the responsibility of the installer to ensure the appliance is provided
with an effective flue.
Some guidelines to assist with flue design are detailed below. These
must be read and modified as necessary depending on the installation.
The Ember must be installed with an approved flue system, approved
components are shown in this guide.
General flueing guidelines
Flue clearance to combustibles
Flueing for the Rinnai Ember, depending on
the installation is comprised of three main
components:
- flexible aluminium flues that come straight
off the fire
- galvanised steel colinear to coaxial adaptor
(stainless steel inner)
- galvanised steel outer, aluminium inner
coaxial flue
These all have slightly different clearances to
combustibles.
Flue cowl clearance
To ensure products of combustion are
cleared, adequate clearance from the building
is required.
The flue cowl should have a 500 mm clearance
from any part of the building. This also applies
to steeped and pitched roofs where the flue
cowl should be 500 mm clear of the ridge
line. An adequate flow of fresh air must exist
around the flue cowl following installation.
Minimum clearances are shown in
AS/NZS 5601.1.
30 | Ember Installation Guide: 12890-B 02-18
Coaxial flue
10 mm from the outer flue to
a combustible surface to allow
for expansion and contraction
of the outer flue components.
Ember adaptor (transition)
25 mm clearance to a
combustible surface the
underside of the adaptor has
zero clearance and can be
installed straight into wooden
support joists.
Ø 100 mm exhaust flexi flue
Requires a 50 mm clearance
to combustibles.
Ø 75 mm intake flexi flue
Requires a 50 mm clearance
to combustibles.
Flue terminal locations
Flue terminals must be compliant with the flue
terminal locations shown in AS/NZS 5601.1.
The flue cannot terminate under a floor or in a
roof space.
Self-supporting flue
The weight of the flue system should not be
supported by the appliance—it should be self-
supporting.
Supporting the flue is usually completed
during the framing stage with flue supports
or straps within the cavity. Wall straps have
been included in the Rinnai vertical flue kits.
Elbow straps are also available as a separate
component to prevent excess weight on the
flue elbow.
Horizontal runs of flue pipe
Horizontal runs of flue pipe must be
supported to prevent any downward sags.
Horizontal pipe sections should be supported
every 1.2 m. Wall straps can be used for this
purpose.
The horizontal run of flue pipe must
have a 20 mm rise for every 1 m of run
WARNING
towards the flue termination, NEVER
allow the flue pipe to run downwards
towards the horizontal flue terminal.
A downward slope can trap heat and
become a fire hazard.
Shared flues
Gas appliances must not be connected to
a chimney or flue serving a separate fuel
burning appliance.
Flashings
Flashings are not included with the Ember
flue kits, these must be specified. The only
exception is the flashing kit provided in the
horizontal flue kit.
500 mm to
nearest part
of roof
Min. clearance of 500 mm to the nearest part of the roof
Self-supporting coaxial flue using a wall strap
Self-supporting flue using straps within the cavity
Ember Installation Guide: 12890-B 02-18 | 31