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Flue Stack
The length and straightness of the flue stack are important to the efficient operation of the
heater/stove. The Flue stack must be the correct diameter. If elbows must be used, the
elbows shall not be greater than a 45 degree angle. The first elbow should not be closer
than 12” (28cm) to the heater/stove. Allow for as much straight pipe as possible before
the first elbow. The stove pipe will attach to the stove by squeezing the round pipe
over the oval flue collar when installing.
A Barometric Damper is a
MUST FOR BEST COMBUSTION.
The barometric damper should be installed in oil and solid fuel heaters and stoves. The
purpose is to maintain a strong draft without causing too much air to the fuel mixture.
When the damper is adjusted the draft is altered by allowing air to be pulled into the
chimney by the air inlet on the damper and not pulled into the primary mixing holes in
the burner.
Install the barometric tee pipe with the front flap facing fore and aft.
In order for the barometric to work efficiently it must be installed between 12” and 24”
from the heater/stove exhaust collar. If using a pipe guard turn the barometric tee to the
back as it does not have to be seen to work.
To adjust the flap on the barometric back off the jam nut and turn the counterweight so
the flap is standing closed. The valve must be set to flow 1 teaspoon per the amount of
seconds as per the list of fuel flow measurements on page 12, and on the #1 lowest
setting. Once the heater/stove has been burning for some time and the room temperature
is starting to rise is a good time to do the adjustment.
Adjust the counterweight so the flap starts to open (aprox 6mm or ¼”). This will allow air
to enter the barometric tee and reduce the air entering the burner. This will cause the
flame to burn above the top burner ring. If the flame is still burning below the ring adjust
the flap open another 3mm or 1/8”. At this time if there is flame burning below the top
burner ring and the barometric flap is open aprox 9mm or 3/8” do not adjust the flap open
any further and re-adjust the valve fuel flow rate until the flame is above the ring.
This adjustment need only done once after the install and the jam nut can be re-tightened.
The draft above the top of the fire will be aprox -.05 inches of water column, should you
have a draft meter, however adjusting the damper as above should get you close enough.
