Napoleon Fireplaces Dream - BGD90 - Manuel (Page 44)

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W415-0826 / B / 07.11.11
11.4 RESTRICTING VERTICAL VENTS
FLUE COLLAR
RESTRICTOR
PLATE
Vertical terminations may display a very active fl ame. If this appearance is
not desirable, the vent exit must be restricted using restrictor plate, W500-
0321. This reduces the velocity of the exhaust gases, slowing down the
fl ame pattern and creating a more traditional appearance.
The plate has a series of holes to allow for adjustment.
Remove the two screws on either side of the exhaust collar inside the
fi rebox. Install the plate in the desired set of holes, then replace the screws.
It is recommended to secure in the third set of holes which causes the
greatest amount of restriction for vent lengths between 15 and 30 feet.
11.3 FLAME CHARACTERISTICS
It’s important to periodically perform a visual check of the pilot and
burner fl ames. Compare them to the illustrations provided. If any fl ames
appear abnormal call a service person.
54.2
3/8” - 1/2”
FLAME MUST
ENVELOPE UPPER
3/8" TO 1/2" OF
THERMOCOUPLE &
THERMOPILE