Multifuel Grate; Notes On Wood Burning - Hunter HAWK 3 Installation And Operating Instructions Manual

Multifuel Grate

Your Hunter Stove is fitted with a locomotive type grate. So
that de-ashing can be carried out cleanly and easily, it is riddled
from the outside of the stove with the doors closed. The grate is
designed to burn both wood and solid fuels.
To burn solid mineral fuels place the operating tool over the
riddling spigot and pull it down towards you. When left in that
position, air is directed under and up through the slots in the
firebed, giving the optimum conditions for burning solid fuels.
It is important that the riddling tool is used to remove the ash to
ensure airflow through the firebed and allow the fire to burn
over the entire area of the grate.
The ashpan should be emptied at least daily and ash should
never be allowed to build up over a period of time as this will result in damage to the fire bars. The
flat end of the riddling tool can be used to carry the ashpan.
To burn wood, push the operating tool up and away from you. When left in this position, air is
restricted through the bed of the fire providing a solid base to build up a bed of ash. Surplus ash
can be removed either by gentle riddling or with a shovel.
It might prove beneficial when burning more reactive fuels to leave the grate in a "neutral"
position, thus directing some under fire air and some over fire air to the firebed.
Notes on solid mineral fuel burning
Solid mineral fuel should be placed in the stove so that there is no more than a 30° incline of the
fuel bed from front to back. It should not be stacked above the level of the rear firebrick as this
may result in damage to the stove.
With a full load of fuel, the stove will need to be refuelled approximately once every 2 hours.
Solid mineral fuel burns most efficiently with the secondary air control in the closed position. The
primary air valve can then be used to control the burn rate of the stove.
Always de-ash before refuelling and do not let the ash build up to the underside of the grate bars.
Solid mineral fuel produces ash, which if allowed to build up will stifle the airflow through the
grate. This will eventually cause the fire to die.
With some solid mineral fuels a residue of burnt fuel or clinker will accumulate on the grate, allow
the fire to go out periodically to remove this.
Important! - We cannot stress firmly enough how important it is to empty the ashpan regularly.
Air passing through the firebed cools the grate bars. Distortion or burning out the grate bars is
nearly always caused by ash being allowed to build up to the underside of the grate.

Notes on Wood burning

With a full load of wood, the stove will need to be refuelled approximately once every hour.
Wood can be stacked higher in the stove than solid mineral fuel but care must be taken that logs do
not touch the baffle.
Wood burns most efficiently with the primary air valve in the open position and the secondary
control partially open. Moving the secondary control will control the burn rate of the stove.
Note - primary and secondary air is needed to light the stove, see section entitled 'Lighting the
Stove'
Wood burns best on a bed of ash and it is therefore only necessary to remove surplus ash from the
stove occasionally.
JINHCR03 Rev A 18/07/12