©
EUROHEAT
DISTRIBUTORS (H.B.S) LTD. May 2012
E & OE Instructions Part number IN1244
8
Stove Controls
Burn Rate Control
The rate at which the stove burns is controlled by adjusting the air entering the stove. Moving the control from
minimum to maximum increases the size of the air inlets, primary or secondary air, in the automatic combustion
system.
The Automatic Combustion System
A bi-metalic coil heated by the flue gases moves a cam which raises and lowers, dependant upon the heat of the
flue gases, a plate or plates which exposes or closes the Primary air (lower inlet) and the Secondary air (upper
inlet).
The three phases of a fire:
1) The lighting phase, where there must be an air supply at the top and bottom of the fire (secondary and primary
air, respectively).
2) The combustion phase. At the ideal temperature of between 1000-1200° Celsius there is only a need for air
above the fire, i.e. secondary air.
3) The burning-out phase. The temperature falls, the air supply above the fire is gradually reduced, and the lower
damper opens, i.e. primary air.
Secondary Air
Primary Air
Air Wash Air
