National Oilheat Research Alliance 29
Figure 5
Setup and Adjustment
The proper procedures for adjusting a power
venter are found in the manufacturer’s instruc-tions
and are typically the following, Figure 6:
1. Set the choke plate on the power vent
to its full open position. (Some power
vent systems have the choke plate on the
inside at the power vent unit and some are
adjusted on the outside of
the building at the power
vent.)
2. Set the draft control
adjustment to its midpoint
position.
3. Fire the system and let
it run for 5–10 minutes to
stabilize stack tempera-ture.
4. Check the appliance
manufacturer’s specifica-tions
for draft over the fire
and at the breech.
5. Close the choke plate on the power vent
until the draft
above the draft
control reads ap-proximately
-.04"
greater than the
recommended
breech draft.
Figure 7.
Figure 6
Figure 7