Restricting Vertical Vents; Venturi Adjustment - Napoleon Ascent BL42NTE Installation Manual

fi nishing
EN

10.8 restricting vertical vents

Vertical installations may display a very active fl ame. If this appearance is not desirable, the vent exit must be
restricted using a restrictor vent kit. Refer to the "replacement parts" section of the owner's manual for the
appropriate kit. This will reduce the velocity of the exhaust gases, slowing down the fl ame pattern and creating a
more traditional gentle fl ame appearance. Specifi c instructions are included with the kit.

10.9 venturi adjustment

note:
An air shutter access plate has been provided for initial fl ame appearance setup. It becomes more diffi cult to
adjust once the appliance has been fi nished.
This appliance has an air shutter that has been factory set open according to the
chart below:
Regardless of venturi orientation, closing the air shutter will cause a more yellow
fl ame, but can lead to carbonization. Opening the air shutter will cause a more
blue fl ame, but can cause fl ame lifting from the burner ports. The fl ame may not
appear yellow immediately; allow 15 to 30 minutes for the fi nal fl ame colour to be
established.
AIR SHUTTER ADJUSTMENT MUST ONLY BE DONE BY A QUALIFIED
INSTALLER!
note:
It is important that the orifi ce is securely inserted into the venturi.
52
W415-3035 / 05.04.21
VENTURI ADJUSTMENT CHART
NG 1/16" (1.6mm)
P 1/4" (6.4mm)
AIR SHUTTER
ACCESS PLATE
Venturi
Burner
Air
Shutter
Opening