CLEAN BURN CB-3500 series, Руководство оператора

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Operator's Manual: Models CB-3500 & CB-5000
8-2
Adjusting the Barometric Damper
NOTE: If the draft overfire is not in the -.02 to -.04 w.c. range, it is necessary to adjust the barometric damper.
Figure 8B - Adjustment of Barometric Damper
1. Before starting the burner, turn the weight
on the flapper COUNTERCLOCKWISE
until the flapper remains closed. This will
provide maximum draft for the furnace.
2. Follow the directions in Section 6 to start
and adjust the burner.
3. With the burner running, check the draft
overfire with a draft gauge.
4. As shown in Figure 8B, adjust the weight
on the flapper to obtain a consistent
-.02 w.c. draft overfire. Turn the weight
COUNTERCLOCKWISE to increase draft
(i.e. draft increases as the flapper closes).
Turn the weight CLOCKWISE to decrease
draft (i.e. draft decreases as the flapper
opens).
5. Tighten the locking nut to securely hold
the weight in position.
Adjusting Draft Over Fire on Furnaces with Draft Inducers
(CB-5000 Standard; CB-3500 Optional)
NOTE: The draft inducer is purposely sized to create a generous draft. When adjusting the barometric damper,
you will find that the flapper is open most of the time. This allows the draft inducer to suck cool air through the
damper to protect the inducer motor from heat damage.
1. Use a draft gauge to check draft over fire.
2. Adjust the barometric damper to obtain -0.02 w.c. draft over fire. If you still have too much draft,
adjust the draft plate on the draft inducer. Move the plate in 1/4" to reduce the draft. Recheck
the draft reading.
TO OBTAIN PROPER
ADJUST THIS WEIGHT
TO OBTAIN PROPER
DRAFT OVERFIRE
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