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General flueing guidelines
Flue clearances to
combustibles
Flashings
Flue support
Securing the flue
Lubricate o-ring seals
before connecting
Flue sections located
outside
Shared flues
Condensate
Screws must not touch the inner pipe—could cause a transfer of heat to the plastic outer and potentially
1
melt the plastic.
4 | Linear flue installation guide 13541-A 01-20
Due to the heat from the flue components, maintain a 25 mm
clearance to combustibles for the first 500 mm of flue.
Flashings are not included with the flue kits, these must be
specified.
The weight of the flue system must not be supported by the
appliance, it must be self-supporting. Supporting the flue is
usually completed during the framing stage with flue supports
or straps within the cavity. Wall straps are included with most
Rinnai flue components.
To prevent the flue from moving or coming apart:
•
Joints between the flue components MUST BE secured by
short screws
(max. length 6 mm) through the outer pipes
1
(easier to undo if necessary).
•
Flue components must be secured to the wall using the flue
straps provided in each flue kit, refer image above.
The inner pipe joints are sealed with an o-ring seal lubricant. A
small plastic tub of silicone grease is provided with the main flue
kits. Use this silicone grease to lubricate the o-rings on the inner
pipes prior to assembly. This is important as o-rings can dry out
and break, and replacing o-rings is difficult.
Do not use petroleum based lubricants as these will cause
deterioration of the o-ring seals.
Sections of the flue located outside require the following:
•
Only use PVC cement between the joints of the outer PVC
pipes to secure and seal the joints against ingress of dust
and water.
•
Only use non-acidic silicone sealant between the joints of
the outer PVC pipe and any mating aluminium components
to seal the joints against ingress of dust and water. Silicone
containing acetic acid or other acids as the curing agent may
cause the aluminium to corrode.
Gas appliances must not be connected to a chimney or flue
serving a separate flue burning appliance.
A condensate trap or drain is not required for Linear installations
as little or no condensate is produced, as the flue runs hotter in
Linear installations.
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