Installation and Operating Instructions for
Bohemia X 40 Inset
Multi Fuel Stoves
Page
3 of 10
Reference: Pevex10004/AH/ver2 Date: June 2011
It is essential when burning smokeless solid fuels that the ash pan is emptied on a daily basis. Ash must not be allowed
to build up below the grate. Note brown coal and smokeless fuel should also be stored dry and ventilated.
Use of Petroleum coke and liquid fuels
will invalidate the guarantee and
must not be used
as this will cause the stove
to “over fire”. Operating at temperatures in excess of 500ºC will cause irreparable damage which is not covered by the
guarantee.
FUEL CONSUMPTION AT NOMINAL HEAT OUTPUT
Nominal Output KW
Wood kg/hr
Smokeless Fuel (Ancit) kg/hr
Bohemia X 40 Inset
4.5
1.3
0.71
Tested according to the requirements of EN13229 and are fully assessed and considered to meet UK smoke control
requirements. Note that different fuel consumption results may be achieved due to other factors which include the fuel,
chimney draught and atmospheric conditions etc.
LIGHTING AND COMBUSTION
The primary air is drawn into the stove through the airslide on the lower part of the door. The secondary air is regulated
with the aid of a slider above the door. The heated secondary air flows down the viewing window and then feeds the fire;
it is this secondary combustion that completes the burning cycle by turning unburned volatiles into flame. Finally, any
remaining unburnt volatiles are burnt when preheated tertiary air enters the firebox through the tertiary air diffuser at the
rear of the firebox.
As much as half of the heat obtainable from wood is achieved from secondary and tertiary combustion. It is important
that the firebox temperature is maintained at a high level as this also aids complete combustion. For example, when first
lighting a stove it is important to get it really hot before closing the burning rate down. The firebox temperature should
reach 400°C which equates to approximately 250 °C at the flue pipe
The Bohemia X 40 inset stove is designed and has been tested to burn extremely cleanly with very little smoke discharge
even when the airsliders are in the fully shut off position. This is because the airsliders allow a permanent and preset
bleed of air into the firebox to fuel the fire eliminating smoke and unburnt hydrocarbons. Permanent stops are fitted to
the appliance to ensure that the primary and tertiary air controls cannot be closed beyond 0.5cm open and 2cm open
positions.
The appliance will only be considered as exempt appliances if these stops are in place.
When both sliders are in the off position (fully positioned to the left) the stove burns at approximately 30% of its rated
nominal output. Adjusting the secondary airslider to 50% of its travel to the right will ensure that the stove operates at its
nominal optimum cleanburning combustion producing negligible levels of smoke.
The nominal output is the output to which the stove has been tested. In practice, the stove burns with a heat output range
between its minimum and maximum ratings.
LIGHTING THE STOVE
1. Put 2 small logs on a bed of ash spaced
about 10-12cm apart. Place some scrunched
up newspaper/paper with 1-2 firelighters in
between .
2. Neatly stack dry kindling on top of the
logs into approx 3 layers and light the
bottom fire lighters.
3.Fully open the top (secondary) and bottom
(primary) airsliders and leave the door
slightly ajar to allow air to enter and the fire
to establish.
