HWAM Autopilot IHS 3420, User Manual

17

In exceptional cases the system might not register that the stove has been re-stoked. This can occur if 
the oxygen level in the combustion compartment, due to the low flue gas temperature, reaches a point 
where the system fails to register an increase in the oxygen level in spite of the stove door having been 
opened. After stoking, the status line should therefore be checked on the remote control. Shortly after 
the lighting of the wood, the middle section of the remote control, representing the combustion process 
phase, should light up (

). If it enters standby mode, press the remote control 

twice, so the match symbol is displayed.

During combustion, the outer surfaces of the stove will become hot, and due care must 
therefore be shown.

Firing with coal, briquettes and coke

Burning coal and coke is not possible in this stove since there is no room for a coal insert. Briquettes 

can be used however. These are placed onto the wood embers. 
Remember that after this the regulating rod must be closed again. 
Be aware that using fuels other than wood, will cause soot to form on the glass pane.

Operating the heat compartment damper - HWAM 3520/3530
There is a damper at the back of the stove between the top plate and the heat compartment that opens 
and closes the flow of convection air in the heat compartment. The supply of convection air can be opened 
by moving the damper to the left and closed by moving the damper to the right. 
We recommend that the convection damper is kept closed when fuelling the stove in order to heat up 
and thereby store heat in the soapstone interior of the heat compartment as rapidly as possible. 
Keeping the convection damper closed retains the heat stored in the soapstone as long as possible. When 
the damper is opened, the heat from the soapstone in the heat compartment will rapidly be transferred 
to the room. 

F

iRing

in

gEnERAl

Rapid or fierce heat
Rapid or fierce heat is obtained by burning many small pieces of wood.

Maximum amounts of fuel:
The maximum allowed amount of fuel per hour is: 
Wood: 2.4 kg
If these limits are exceeded, the stove will no longer be covered by the factory guarantee, and it may also 
become damaged due to excessive heat. The stove has been approved for intermittent use.

Typical re-firing interval
Typical re-firing interval at nominal performance
Wood: 65 min

Long burning times
You achieve the slowest combustion by setting the desired room temperature at level 0. At this level 
the combustion takes place with the lowest possible flue gas temperature and the ember phase will be 
drawn out as long as possible.

How to achieve the best combustion
The HWAM Autopilot IHS

TM

 is purposely designed to generate the cleanest and the most economical 

combustion. A good combustion is achieved when the fire gets the right amount of oxygen supply at 
the right time and place in the combustion chamber. The HWAM Autopilot IHS

TM

 allows for variations