Valor VENTANA 1200EAN Installation & Operating Instructions Manual page 19

Restrictor
MANY INSTALLATIONS REQUIRE A RESTRICTOR
for improved flame picture and performance, This unit
is supplied with one restrictor having four different
positions or settings. The level of restriction required
depends on the vertical rise in the venting system and,
to a lesser degree, the horizontal run and number of
elbows.
The amount of restriction is based on laboratory tests.
The ideal restrictor position may vary slightly, especially
when the vent pipe length is near the limits of the
acceptable configurations for each type of restrictor.
The chart on the previous page shows the vent
restrictor required relative to the length of the vent pipe.
Position #1
Position #3
Venting
To install the restrictor:
1. On an engine previously installed, open the panels
on each side of the window. Remove the window
skirt, the window, the logs, the right and rear top
brick panels.
2. According to the installation, look up the venting
chart on the previous page to know what position
the restrictor should be fitted in.
3. Remove the screws (2) on each side of the venting
port.
4. Place the restrictor in the required position over the
two holes.
5. Fit the screws and tighten.
6. Continue the installation or, for an engine previously
installed, replace the right and rear top brick panels,
the logs, the window and the window skirt. Close the
side panels.
Position #2
Position #4
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