Masonry Flue Installations - Rinnai Compact 2 RIBF2L 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, 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 flue
to provide flueing for the heater.
Check dimensions of opening
Ensure opening is within the range provided (p. 5), 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 solid, flat, and sealed base, otherwise noise and vibration may result. Sealed means no
holes or openings in the fireplace.
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 swept, 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.
Chimney plate
Mortar
Open chimney installation
12 | Compact 2 Installation Guide: 11817-D 04-15
Approved chimney
cowl
Chimney plate
Minimum
200 mm
Adaptor
Flexible
Minimum chimney liner
3.6 m
Appliance
adaptor
Minimum
50 mm
Lined chimney installation
Approved chimney
cowl
Minimum
Mortar
200 mm
Minimum
3.6 m