11
Diagram 7
COMMISSIONING
On completion of the installation and after allowing a suitable period of time for any fire cement or mortar joints
to dry out, the stove should be cleaned using a soft dry cloth. Check joints and seals, especially boiler connec-
tions. Ensure that any boiler connections are the right way round. (Flows are the top connection and returns the
lower). The stove can then be lit and checked to ensure that smoke is taken from the appliance up the chimney
and emitted safely.
The customer should be advised on the use of the appliance.
On completion of the installation and commissioning please leave these operating instructions with the
customer.
HETAS LTD APPROVAL
These appliances have been approved by HETAS Ltd as an intermittent operating appliance for burning Wood.
ALWAYS BURN DRY WOOD
. Wood burns
best
on a bed of ash
(25mm recommended) so do be careful to
retain some when de-ashing. Dry wood means that it has most
definitely not more than 20% moisture
con-
tent. Wood to be used as a fuel should be logged, chopped and
stored in a sheltered but airy site
for an ab-
solute minimum of 12 months and
preferably 24 months
. Wood naturally dries at the rate of 1" per year so a
12" round will take 6 years to dry to the centre.
Do not be tempted to stack wet wood on or
around the
stove
believing this will dry the sap out of the wood. A 12" log takes approx 8 weeks in a kiln to dry to 18%
moisture - so the odd hour or two on or by the stove only increases the likelihood of burning your house down!
Freshly cut green wood
- i.e. wood that still has sap in it -
is dangerous to burn.
It will cause a chimney to
choke with wood tar in a few weeks with a grave risk of a chimney fire resulting. In any case,
burning sap wet
wood is pointless
. It produces far less heat, maybe as little as 10% of that of dry wood.
Treat any bought in wood
as wet unless its history is known.
Do not burn wet wood with solid fuel
as a very aggressive acid is created which is lethal for the stove,
chimneys and flues.
Do not burn treated wood.
Tar
is caused by burning wet wood. It is brown/black in colour and may be liquid. It has an offensive smell. On
the sides of the stove, flue and chimney it resembles a black sticky 'chewing gum' and can eventually block the
flue ways. When it ignites, it can cause a chimney fire and be highly dangerous.
Please note that HETAS Ltd Appliance Approval only covers the use of the above fuels on these appliances.
HETAS Ltd Approval does not cover the use of other fuels either alone or mixed with the recommended fuels
listed above, nor does it cover instructions for the use of other fuels.
