Masonry Flue Installations - Rinnai RIBF2N Installation Manual

Masonry flue installations

There are two types of masonry flue installations; open chimney and lined chimney. An open
chimney uses the natural draft properties of a sound chimney, and an approved chimney
plate and cowl to provide flueing for the heater. A lined chimney installation is used when the
existing chimney condition is inadequate for an open chimney installation, and uses a Rinnai
flexiliner system to provide flueing for the heater.
Check dimensions of opening
Ensure opening is within the range
provided (p. 6), and if necessary
bring them to the required
dimensions. Also check chimney
height as inadequate height can
affect product performance.
Some installations may require the
chimney height to be extended to
reduce down drafts. Also check
there are no obstructions.
Provide a firm, flat, and sealed
base, otherwise noise and
vibration may result. Sealed means
no holes or openings in the fire
place.
Some criteria for checking
chimney soundness
Rinnai strongly recommends
the use of a Rinnai flexiliner flue
system. Failure to meet this criteria
may result in an unsafe situation.
Installation without a flexiliner
flue is permissible as long as the
chimney is checked for soundness
and ability to achieve a good
draw. Some criteria for checking
soundness:
- All loose/broken bricks must
be replaced or repaired
ensuring the chimney is of
sound construction and does
not leak.
- Chimney must be swept clean
and be free from soot and
creosote that may have built
up if previously used for a
solid fuel fire
- Any damper plate must be
fixed in an open position or
removed
- Any underfloor air supply
to the fireplace must be
completely sealed to prevent
secondary air draw
Approved chimney
cowl
Chimney plate
Mortar
Open chimney installation
Chimney plate
Mortar
Adpator
Flexible
chimney liner
Appliance
adaptor
Lined chimney installation
Compact 2 Installation Guide: 11817-B 02-12 | 11
Minimum
200 mm
Minimum
3.6 m
Minimum
50 mm
Approved chimney
cowl
Minimum
200 mm
Minimum
3.6 m