Shutting Down The Air Supply - Osburn OB04010K Installation And Operation Manual

4.3.5 Shutting down the air supply

The fireplace can operate at three different settings: Maximum combustion rate, medium combustion rate
and finally low combustion rate. At the low combustion rate setting, the fireplace is operated with an air
control system that regulates the combustion.
The maximum combustion rate setting is usually for cold startup and when maximum heat is desired
(Position A). At the maximum combustion rate setting, the air control system is not operating.
THE AIR CONTROL SYSTEM IS ACTIVATED ONLY WHEN THE AIR INTAKE IS COMPLETLY CLOSED
(POSITION B) AND WHEN THE FIREPLACE IS HOT ENOUGH.
When you close the air intake, you gradually reduce the combustion. Visually you will be able to notice a
considerable reduction of combustion. Under these conditions, you will be at the medium combustion rate.
Using the secondary air intake lever you can adjust your combustion system to eventually reach the
minimum combustion rate.
If the flames diminish to the point of disappearing when you reduce the air supply, your wood can be too
humid. If you have seasoned wood and use the air intake control properly, the flames should decrease, but
remain strong and stable, even when operating at low combustion rate.
20
NOTE
Position A: In this position, air supply
is fully open. You should be using this
position for:
• Cold start;
• Maximum burn rate;
Position B: Air control intake is closed.
The air control system is activated.
Position B1: Low combustion rate.
Position B2: Medium combustion rate.
Example of operating sequence:
A: Cold start or Maximum burn rate.
B: Mid-High until the factory setting
temperature is reached.
B-2 or B-1: Mid-Low or Low once the
factory setting is reached.
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