Installation manual
Rinnai New Zealand Limited Neo Installation Manual: 11906-B
02-11
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General ueing informaon
Flashings
Flashings to the top of chimney structure do not form part of the ue kit and must be specied.
Clearance to combusbles
For installations using the Rinnai zero clearance ue components, the minimum clearance from
inner ue to combustible material must be greater than 50 mm. This equates to 25 mm from
the outer ue when using the Rinnai twin-skin ue.
Flue length and number of bends
Minimum ue length
This is required to ensure adequate draw and prevents spill-back of combustion products which
can cause the safety sensors to shut down the unit.
• minimum ue length before any bends or osets = 1.0 m
• minimum vertical ue length = 3.6 m
Maximum ue length and number of bends
Rinnai recommend a maximum ue length of 8 m with a maximum of two 45° bends.
Self-supporng ue
The weight of the ue system should not be supported by the appliance—it
should be self-supporting. Supporting the ue is usually completed during the
framing stage with ue supports or straps within the cavity.
Every gas replace requires a ue system that will draw eectively and clear ue products
safely under all potential wind and climatic conditions. It is the responsibility of the installer to
ensure that the appliance is provided with an eective ue.
For installations requiring a ue, a Rinnai ue system must be used. The ue system must be
fully assembled and secured in place before the appliance is installed.