HWAM Autopilot IHS 3420, User Manual

16

Place two pieces of wood (5-8 cm in diameter) horizontally in the bottom of the 
combustion compartment. Place 5-8 pieces of kindling randomly on top. Place 
two fire-lighters in between the top layers of kindling. Press the remote control 
twice to activate the symbol of lighting up. Light up the fire-lighters and close the 
stove door. Adjust the temperature selection mechanism on the remote control 
to the desired heat level.

If the desired flue gas temperature of 350° C has not been achieved within 15 minutes, the remote control 
will activate a re-stoking alarm even if there still might be wood and flames in the combustion compart-
ment. The re-stoking alarm can seem misplaced, but it is activated because the temperature climbs too 
slowly. Re-stoking with small pieces of kindling wood can often result in a faster increase in temperature.

HWAM Autopilot IHS

TM

 closes all three air dampers when the stove is in standby mode. This prevents 

hot air from the room to enter the chimney (heat loss). This might on the other hand result in a very 
cold chimney when the stove is lit. In certain cases it is necessary to assist the draught in the chimney 
by burning a couple of newspaper pages on top of the wood ready to be lit. Read more on www.hwam.
com about the function of the chimney.

Important! 
The ashpan must not be opened when lighting up. It must always be closed when the stove is in use. 
Otherwise the stove’s intelligent control system does not function. The door should only be opened when 
lighting up, when restoking, and when cleaning the stove. 

The Thermostat  Function
The HWAM Autopilot IHS

TM

 will in general have an environmentally friendly combustion and adapt to 

the desired room temperature. The thermostat function is designed as a radiator valve. The user enters 
a desired heat level, which suits the room in which the stove is installed. When the thermostat is set at 
a heat level, the control function will adapt to this temperature.

•  If the room temperature is lower than the desired heat level, the control function increases the flue 

gas temperature in order to increase the heat radiation from the stove.

•  If the room temperature is higher than the desired heat level, the control function decreases the flue 

gas temperature, thereby giving the layer of embers as long a life as possible before re-stoking. This will 
reduce the heat radiation from the stove and facilitate re-stoking without having to light up the fire 
anew. If the room temperature drops below the desired level, the ember phase will be shortened, and 
the system will activate a re-stoking alarm. The system will signal that a re-stoking is due at the flue gas 
temperature of 180° C, and at 100° C the system will enter standby mode and all dampers will close.

•  Should the room temperature be much lower than the desired heat level, the control function increases 

the flue gas temperature. If a satisfactory increase in temperature does not occur, the control will 
activate a re-stoking alarm, since it expects that more wood is needed to increase the heat level in the 
room.

•  If the room temperature after a new re-stoking still does not reach the desired level, the water content 

in the firewood may be too high or the draught in the chimney too weak. For environmental reasons 
the recommended flue gas temperature should always be a min. of 350° C.

Stoking
When the stoking alarm on the remote control sounds, the stove is ready for stoking. The remote control 
will recommend the amount of wood you should use. 

Small amount of wood 

Medium amount of wood  

Large amount of wood 

(700 - 1200 g) 

(1000 - 2000 g) 

(1800 - 3000 g)

In terms of combustion technique, you should always stoke the stove with at least two pieces of wood 
at a time even if you only use a small amount of wood. You can also choose not to restoke. After a while 
the stove will then automatically go into hibernation.