ACR Electronics Astwood AW1MF User manual

TECHNICAL MANUAL
The Astwood
Multifuel Stove
Model AW1MF
To be retained by the user for future reference
Serial Number ……………………………. Document AW1MF 0101
Thank you for purchasing an ACR Heat Products stove.

To ensure that you gain the most from your purchase, please take a few
minutes to read through this manual before lighting the appliance for the
first time.
SINCE APRIL 2002 ONLY REGISTERED COMPETENT INSTALLERS CAN INSTALL
SOLID FUEL APPLIANCES. INSTALLATIONS CARRIED OUT BY NON-REGISTERED
INSTALLERS MUST BE INSPECTED BY LOCAL AUTHORITY BUILDING CONTROL.
FOR MORE INFORMATION PLEASE CONTACT HETAS AT;
www.hetas.co.uk OR TELEPHONE [phone]
The installation of this appliance must comply with current Building
Regulations and local regulations, including those referring to
national and European standards need to be complied with when
installing the appliance.
Do not operate this appliance if it becomes damaged.
Improper use, maintenance or fitting parts other than those
approved by the manufacturer could lead to the appliance
becoming damaged or unsafe which in turn could lead to personal
injury or damage to the property and will void the warranty.
The appliance must not be modified in anyway unless authorized by
ACR Heat Products Ltd.
The appliance should be inspected regularly to ensure the airways
are clean and free from obstruction and the chimney swept at least
once a year.
The external surfaces of this appliance will be very hot to the touch
when in operation and due care will need to be taken when
operating the appliance to ensure safety. A fire guard should be
fitted if it is likely that the elderly, infirm or children may come into
contact with the appliance.
This appliance must not be used as an incinerator.
This appliance has been designed for intermittent operation.
Before installation, please ensure that the correct model has been
supplied. Please also make a note of the serial number of your appliance
in the space provided on the front cover of this manual as this will be
requested if you require technical assistance in the future.

ASTWOOD SPECIFICATIONS
Nominal heat output ………… 7 kW –WOOD 6.8 kW –SMOKELESS FUEL
Chimney draft required ……… 12Pa
Height …………………………… 595 mm
Width ……………………………. 545 mm
Depth ………………………….... 415 mm
Weight …………………………… 80 kg
Direct Air Intake………………… 80mm
Air Requirement ……………….. 11cm/sq
Flue Mass Gas Flow …………… g/s –WOOD g/s –SMOKELESS FUEL
Mean Flue Gas Temperature .. °C –WOOD °C - SMOKELESS FUEL
Efficiency ………………………... %
Log Length ………………………. 400 mm
*** Please note that Building Regulations Document J advises that
additional air supply is required for appliances with an output of above
5Kw. With modern properties additional air may be required as
Document J suggests that adequate air would be a benefit. If in doubt,
please consult your registered installer for advice. NOTE: Extractor fans
when operating in the same room or space as the appliance may cause
problems.
Location of the unit
Clearances to non-combustible materials
There must be a minimum clearance of 150mm at each side of the
appliance. A clearance of 150mm is required at the back of stove (if the
rear wall has a thickness of 200mm or more this measurement can be
reduced to 50mm) A minimum clearance of 150mm is required above the
appliance.
Clearances to combustible materials
There must be a minimum clearance of 450mm at each side and 750mm
at the rear of the appliance from any combustible materials. If using
single wall flue pipe, there must be a clearance of at least 3 times the
diameter of the flue pipe (e.g 125mm diameter pipe = 375mm minimum
clearance) from any combustible materials e.g wooden beam.
Curtains and soft furnishings should be a minimum of 1m away from the
appliance.
Adequate space should be provided for servicing the appliance.

We do not recommend that plasma televisions and expensive artwork are
hung over the fireplace.
Please remember that this appliance has been designed to provide heat
and if installed into a recess enough space should be left around the
appliance to enable the heat produced to rise and escape from the
recess back into the room.
Hearth Requirements
The appliance must stand on a level fireproof hearth with a minimum
thickness of 12mm. The hearth temperature created by this stove is below
100˚C. The hearth must protrude at least 300mm in front of the appliance
and 150mm either side of the appliance.
The appliance shall be installed on a floor with an adequate load bearing
capacity. If an existing construction doesn’t meet with prerequisite,
suitable measures (e.g. load distributing plate) shall be taken to achieve it.
Flue Requirements
The chimney must comply with current Building Regulations. Provision
must be made to provide access for cleaning the appliance, the flue gas
connector and the chimney flue.
The flue must be:
In sound condition and provide sufficient draft
Suitable for use with solid fuel burning appliances
Free from deposits
Well insulated
At least 4.5m in height
The flue must not be:
Shared with other appliances
Weight bearing on the appliance
A smaller diameter than the appliance flue collar size (125mm)

Assembly of the unit
The appliance is supplied assembled with the flue spigot in the top exit
position. If you intend to install the appliance using a rear flue
connection, the blanking plate should be swapped over as follows:
Remove the internal baffle plate
Remove the blanking plate retaining bar internally.
Remove the flue spigot from the top exit by removing the securing
bolts and rope seal.
Refit the rope seal and flue spigot to the rear exit and secure with the
bolts. Seal with fire cement.
Refit the blanking plate to the top exit using the rope seal and retaining
bolts.
Maintenance
The chimney should be swept at least once a year together with the flue
pipe connection. Care should be taken to ensure that there is not a build
up of soot on the baffle and in the airways of the appliance.
If the appliance has not been operated for long periods, the flue should
be inspected and swept before use to ensure there are no blockages
within the flue.
The grate should be cleaned regularly and the ashpan emptied daily.
NEVER ALLOW THE ASH IN THE ASHPAN TO OVERFILL ALLOWING ASH TO BE
IN CONTACT WITH THE UNDERSIDE OF THE GRATE. This will overheat the
grate and cause premature wear and distortion.
The internal vermiculite panels of the appliance should be checked
regularly for soundness. If any wear and tear is found, we recommend
these parts are replaced immediately.
Check the rope door seals are intact and are not worn. These should be
replaced on an annual basis to ensure the correct operation of this
appliance.
The glass can be cleaned using a soft damp cloth and window cleaner or
ACR stove glass cleaner (available from your local stockist)
Use only replacement parts recommended by the manufacturer.
We recommend that the appliance is serviced annually by a competent
engineer to ensure it’s continued safe operation.

User Instructions
Please note that during the first firing, we recommend a small fire is lit and
that you slowly increase the temperature to enable the various parts to
expand normally.
You may also experience fumes and a haze being given off by the stove
during the first firing and possibly for the next couple of firings as the paint
cures. This is normal but please ensure that the room is well ventilated
during this period.
The appliance should not be operated in mild weather with smokeless
fuel. Under certain weather circumstances e.g. fog the chimney will not
draw sufficiently well and could cause asphyxiation. Either await better
weather or burn wood only.
In the rare event of a malfunction due to overheating or a chimney fire,
the air slides should be shut down completely and the fuel allowed to
burn out. In the event of a chimney fire, once the air slides have been
closed completely, dial 999 for assistance. If the appliance has
overheated, the appliance will need to be inspected for any damage
before it can be operated again.
Recommended Fuels
Wood –hardwood such as ash, oak and beech which have been cut for
at least 2 years and stored under shelter. The logs should have a
maximum moisture content of 20%
Smokeless Fuels –such as Homefire, Phurnacite, Ancit
Prohibited Fuels
Green wood –i.e wood which is less than 2 years old with a moisture
content of above 20%
Recovered wood –i.e pallets, railway sleepers etc. These will have been
chemically treated and will pollute the atmosphere and possibly overheat
the appliance.
Housecoal or Bituminous coal –these fuels will soot up the airways of the
stove and possibly overheat the appliance.
Petroleum Based Coke –this will overheat the appliance and possibly
damage the unit. (Not above 20% Pet coke content)
Any form of liquid fuels.

Instructions for use with wood
Slide the top air control to the right and pull open the primary air fully.
Lay firelighters or rolled up newspapers on the grate and add a small
amount of kindling wood to the top. Place 1 or 2 small logs on the top.
Light the newspaper or firelighters using a long taper and push the
door to.
When the fire is burning fiercely, after a couple of minutes add more
logs and close the door.
When the fire has become established, close the primary air down.
The burning rate can be altered by moving the top air slide.
Care should be taken to ensure that the logs are not placed higher
than the log guard allows.
Instructions for use with smokeless fuel
Slide the top air control to the right and open the primary air fully.
Lay firelighters or rolled up newspapers on the grate and add a small
amount of kindling wood to the top. Place a small quantity of
smokeless fuel on top.
Light the newspaper or firelighters using a long taper and push the
door to.
When the fire is burning fiercely, after a couple of minutes add more
smokeless fuel and close the door.
When the fire has become established, close the top air down.
The burning rate can be altered by moving the primary air slide.
Care should be taken to ensure that the firebox is not overfilled with
smokeless fuel –it should be no higher than the log guard.
Re-fueling
Always refuel onto a bed of hot embers.
Never overload the stove –it will work very well with two medium sized
logs.
Once you have added more fuel, leave the door slightly ajar for a few
moments afterwards to allow the initial volatiles in the fuel to burn. Once
the new fuel is established, close the door and control the burn rate as
above.
Occasionally fumes may be emitted into the room during the refueling
process.

Persistent fume emission is dangerous and must be investigated. If fume
emission persists open doors and windows to ventilate the room and let
the fire die out. Have the chimney inspected for blockages and clean if
required. Do not relight the fire until the cause has been found. We
recommend that you seek professional advice.
This appliance has been designed to be burned with the door closed at
all times other than when refueling. It should not be operated as an open
fire.
Typical refueling intervals for wood is 1 hour and smokeless fuel is 2 hours.
Daily Maintenance
The ashpan should be checked and emptied regularly. You should never
allow the ashes in the pan to build up to the level of the grate. If they are
allowed to build up, the grate will become sandwiched between the ash
below it and above it. This will overheat the grate and cause distortion
and premature wear.

Troubleshooting
Problem Probable Cause Action Recommended
Fire difficult to Green wood / wet wood Use hardwood logs
Start / Fire goes with a maximum
Out moisture content of 20%
Logs are too large Use small logs to start
The fire and once
Established use split logs
Not enough primary air Open air control
Insufficient draft Check the flue is not
Obstructed
Fire burns too Too much draft Reduce the air control
Quickly
Excessive draft Install a draft stabiliser
Smokes on initial Flue is cold Burn paper and kindling
Lighting to increase heat in flue
Smokes while Insufficient draught Check the flue is not
Burning obstructed
Low heat output Poor quality wood Use seasoned
Hardwood (this has a
Higher calorific value)

Commissioning Check List
(Please mark box when completed)
Ensure the serial number has been recorded on the front of this manual for
any future use
Ensure the door seals are in good condition and that the glass is secured
correctly in the door (do not over tighten the glass as this will prohibit its
expansion and could cause the glass to crack)
Ensure that all internal components are fitted correctly (these may have
shifted in transit)
Ensure that the appliance operates correctly during the first firing
Ensure the customer is aware that fumes may be given off during the first
firings as the paint cures
Advise the customer on the safe operation of the appliance
Leave the instruction manuals, operating tool and glove for the
customer’s use.

Warranty Certificate
The specifications within this document are provided for information
purposes only and are under no circumstances binding.
With the aim of constantly improving our products, all modifications
considered necessary may be made without notice.
Our appliances are guaranteed against faults and hidden defects subject
to the following conditions:
The appliance must have been installed by a registered competent
installer or inspected by local authority Building Control
The appliance must be installed and operated in accordance with our
instruction manual
The guarantee is for a period of 5 years on the appliance body from
the date of purchase
The following components are considered as consumable components
and are excluded from the guarantee:
Grates
Rope seals
Ashpan
Internal vermiculite panels
Glass
Baffle plates
Your statutory rights are not affected by this warranty.
In the event of a warranty claim, please return the form overleaf to ACR
Heat Products Ltd, Unit One, Weston Works, Weston Lane, Tyseley,
Birmingham, B11 3RP, UK.

Warranty Claim Form
Customer Name: ………………………………………………………………………
Customer Address: …………………………………………………………………….
………………………………………………………………………………………………
……………………………………………………………. Postcode ………………….
Daytime Tel: ……………………………. Mobile Tel: ………………………………
Model Name: …………………………… Model Number: ……………………….
Serial Number: ………………………………………………………………………….
Date of purchase: ……………………………………………………………………..
Date of installation: ……………………………………………………………………
Installer’s Name and address: ………………………………………………………
………………………………………………………………………………………………
………………………………………………………………………………………………
Installer’s Registration Number: ……………………………………………………..
Building Control Certificate Number (if not installed by a registered
competent installer): ………………………………………………………………….
Dealer Name and address: ………………………………………………………….
………………………………………………………………………………………………
………………………………………………………………………………………………
Unit One Weston Works, Weston Lane, Tyseley, Birmingham, B11 3RP. UK
Tel: [phone] Fax: [phone]

Email: [email protected]