Creating An "External Wall" Flue Installation - Rinnai RHFE-308FTR Installation Manual

CREATING AN "EXTERNAL WALL" FLUE INSTALLATION

Total flue length can be up
to nine (9) metres long and
can contain a maximum of
three (3) ESBEND (3 x 90°)!
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The creation of the horizontal section of flue installation is the same as creating a DIRECT or DIRECT EXTENDED
flue installations with the following exceptions:
The direction of horizontal fall of the flue pipe is reversed. For Wall External flue installations, a 2° fall is
required from the wall penetration towards the heater. This will ensure the small amount of condensation in the
short section between the heater and condensation trap will 'burn off' rapidly during normal operation.
An ESBEND rather than a mushroom flue terminal is fitted at the end of the horizontal flue run.
Sections of flue installation located outside require the following precautions:
ONLY use PVC cement between joints of the 'outer' PVC flue pipes to secure and seal these
CAUTION
joints against ingress of dust and water.
ONLY use non acidic silicone sealant between the joints of 'outer' PVC flue pipes and any
mating aluminium components (such as the condensate trap) to secure and seal these joints
against ingress of dust and water. Silicone containing acetic acid (vinegar) or other acids as the
curing agent may cause corrosion of aluminium components and MUST NOT be used.
Steps for creating a External-Wall flue installation are as follows:
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1. Create the wall penetration(s) in accordance with the section "WALL PENETRATIONS" refer to page 8.
The minimum diameter required for wall the penetration for a DIRECT flue installation is 80mm
noncombustible surfaces such as brick and 100mm to combustible surfaces such as plaster.
Allow for a continuous 2° fall towards the heater connection point from the external wall penetration.
2. Prepare the 'horizontal' section by following step 2 of "CREATING A "DIRECT" FLUE INSTALLATION" refer to
page 11 or step 2 of "CREATING A "DIRECT EXTENDED" FLUE INSTALLATION" refer to page 12 depending
on wall thickness (note that a direct extended flue installation example is illustrated above).
Slide the internal wall plate over the terminal end of the assembled flue pipe until it is nested on the raised ring
of the flue transition.
3. Pass the flue assembly through the internal wall penetration until the internal wall plate is flush with the wall.
Rinnai Australia
FLUE COMPONENT ASSEMBLY
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Min' required protrusion 50mm
2
Internal wall plate, outer face
Activities for creating an External Wall installation:
a.- f. Refer to Direct & Direct Extended (as required).
g. Assemble Wall Plate.
h. Assemble & Fit Bend.
i. Fit Condensate Drain.
j. Cut, Fit & Secure Components. Seal Joints
(as required).
CAUTION
k. Create Vertical Penetrations (as required).
l. Fit & Fasten Roof Cowl or On-Wall Terminal.
z. Finalise Installation & Commissioning of Heater.
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13 ES Flue Installation Manual