Reducing Clearances To Combustibles; Installing The Bypass Damper Handle - Nectre Fireplaces Bakers Oven Installation Instructions Manual

1.3.

REDUCING CLEARANCES TO COMBUSTIBLES

If it is necessary to install a heater closer to a combustible
surface than the stated requirements in this installation
manual, it must be done in accordance with Australian
Standard AS/NZS 2918:2018 Section 3, Tables 3.1 & 3.2.
Shield Construction: The shield shall be constructed from a
heat resistant material. The shield must be fixed to the surface
that requires protection and NOT the heater.
The Standard allows three options to reduce stated
clearances.
Single layer of continuous material with Minimum Air Gap of
12mm—Clearance Factor = 0.40
Single layer of continuous material with Minimum Air Gap of
25mm—Clearance Factor = 0.30
Two spaced layers of continuous material with Minimum Air
Gaps of 12mm + 12mm—Clearance Factor = 0.20
The shielding must be open at the top and bottom (vented) to
allow a continuous air flow. It is this air flow that keeps the
surface requiring protection cool. Fixings should not impede
this air flow.
The shielding needs to go far enough along and up the wall so
that the original side and rear required clearances are not
compromised. As the flue is now closer to the wall the
shielding should also protect the wall from the flue pipe.
Example:
The side wall clearance for a heater is 350mm.
A 12mm gapped shield on the wall with a factor of 0.40.
Calculate: 350mm x 0.40 = 140mm. This is the new side wall
minimum clearance.
The shielding needs to be large enough so that none of the
original clearances 350mm are compromised.
1.4.

INSTALLING THE BYPASS DAMPER HANDLE

Before installing the flue, the bypass damper handle must be
fitted. The handle is supplied inside the firebox.
1) Insert the threaded end of the handle into the 10mm hole
on right side of heater.
2) Looking down through the flue spigot, locate the
threaded end of the handle with the connector attached
to the by-pass damper.
3) Screw the handle all the way into the nut until tight.
4) Lock into place with the M4 screw.
The position of the handle should be at approximately 1
o'clock when the damper is open, and 11 o'clock when the
damper is shut.
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