ACR Heat Products Malvern MV1MF User manual

TECHNICAL MANUAL
Malvern
Multifuel Stove
Model MV1MF
To be retained by the user for future reference
Serial Number ……………………………. Document MV1MF 0101
Version 1 Date 17/10/13
Thank you for purchasing an ACR Heat Products stove.

Important
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.

MALVERN SPECIFICATIONS
Nominal heat output ………… 5.2 kW –WOOD 4.8 kW –SMOKELESS FUEL
Chimney draft required ……… 12Pa
Height …………………………… 535 mm
Width ……………………………. 445 mm
Depth ………………………….... 285 mm
Weight …………………………… 80 kg
Air Requirement ……………….. N/A ***
Flue Mass Gas Flow …………… 4.3g/s –WOOD 7.1g/s –SMOKELESS FUEL
Mean Flue Gas Temperature... 273°C –WOOD 273°C - SMOKELESS FUEL
Efficiency ………………………... 78.3% - WOOD 70.8% - SMOKELESS FUEL
Log Length ………………………. Up To 300 mm
*** Please note that Building Regulations Document J advises that
additional permanent 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 design air permeability ≥5.0m³/ (h.m²) then 550mm²/kW of appliance
rated output above 5kW
Or
If design air permeability ≤5.0m³/ (h.m²) then 550mm²/kW of appliance
rated output
If in doubt, please consult your registered installer for advice.
NOTE: DO NOT INSTALL IN A ROOM CONTAINING AN EXTRACTOR FAN

MV1MF Dimensions

The Clean Air Act 1993 and Smoke Control Areas
Under the Clean Air Act local authorities may declare the whole or part of
the district of the authority to be a smoke control area. It is an offence to
emit smoke from a chimney of a building, from a furnace or from any fixed
boiler if located in a designated smoke control area. It is also an offence to
acquire an "unauthorized fuel" for use within a smoke control area unless it is
used in an "exempt" appliance ("exempted" from the controls which
generally apply in the smoke control area).
The Secretary of State for Environment, Food and Rural Affairs has powers
under the Act to authorize smokeless fuels or exempt appliances for use in
smoke control areas in England. In Scotland and Wales this power rests with
Ministers in the devolved administrations for those countries. Separate
legislation, the Clean Air (Northern Ireland) Order 1981, applies in Northern
Ireland. Therefore it is a requirement that fuels burnt or obtained for use in
smoke control areas have been "authorized" in Regulations and that
appliances used to burn solid fuel in those areas (other than "authorized"
fuels) have been exempted by an Order made and signed by the
Secretary of State or Minister in the devolved administrations.
The Malvern (MV1MF) has been recommended as suitable for use in smoke
control areas when burning wood.
When the primary air control is in the closed position, it remains
permanently open by 5mm and is prevented from closing fully by a screw.
Further information on the requirements of the Clean Air Act can be found
here: http://smokecontrol.defra.gov.uk/
Your local authority is responsible for implementing the Clean Air Act 1993
including designation and supervision of smoke control areas and you can
contact them for details of Clean Air Act requirements

Installation Instructions
CO Alarms
It is required by building regulations that whenever a new or replacement
wood/solid fuel or biomass appliance is installed in a dwelling a carbon
monoxide alarm to BS EN 50292:2002 must be fitted in the same room as the
appliance.
The alarm should be install according to the alarms manufacturers
instructions and should not be considered a substitute for the appliance
being installed incorrectly or regular maintenance of the appliance or flue
system.
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 300mm 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
Be able to clean the entire length of the flue system without removal of
the appliance
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
This appliance is equipped with a manufactures smoke exempt stop
pre –fitted, under no circumstances should it be tampered with or removed
unless expressly authorized by a competent person
The appliance is supplied pre-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 rear blanking plate.
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.
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 a
ceramic 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 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%, and maximum length of up To 300 mm
Smokeless Fuels –such as Anthracite, 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.
Liquid fuels.
Always check with your dealer or directly with the manufacturer as using
the incorrect fuel may invalidate your guarantee and damage your
appliance.

Instructions for use with wood
Slide the top air control to the right and open the primary air fully by
pulling the lever forward.
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 by
pushing the lever inwards.
The burning rate can be altered by moving the top air slide –move to
the left to close down and move to the right to open.
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 by
pulling the lever forward.
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 by
moving to the left.
The burning rate can be altered by moving the primary air slide –pull
forward to fully open and push inward to close down.
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
When refueling the stove always refuel onto a bed of hot embers, fully open
the secondary and primary air controls until the new fuel is well alight,
before adjusting the air controls for the desired setting.
If there is insufficient burning material in the firebed to light a new fuel
charge, excessive smoke emission can occur. Refueling must be carried out
onto a sufficient quantity of glowing embers and ash that the new fuel
charge will ignite in a reasonable period. If there are too few embers in the
fire bed, add suitable kindling to prevent excessive smoke.

Fuel overloading
Never overload the stove –it will work very well with two medium sized logs.
The amount of fuel specified in this manual should not be exceeded,
overloading can cause excess smoke.
Operation with door left open
Operation with the door open can cause excess smoke. The appliance
must not be operated with the appliance door left open except as
directed in the instructions.
Dampers left open
Operation with the air controls or appliance dampers open fully can cause
excess smoke. The appliance must not be operated with air controls,
appliance dampers or door left open except as directed in the instructions.
Never leave the stove unattended until the new fuel is well alight.
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 dies 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 kindling and 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.

SPAREPART LIST
STOVE-K4221 MALVERN
Position
Quantity
Description
Part number
1
1
burning chamber door complete
8400-314
2
1
hinge
9900-972A
3
1
flue spigot
3490-047
4
2
flue spigot gasket (8x3)
1982-004
5
4
leg
9900-1258B
6
1
linea spring
6536-018
7
1
primary air regulator
5311-645A
8
1
door cover plate
9900-993
9
4
adjustable feet
4300-949
10
1
blanking plate
4111-136
11
1
secondary air box
9900-971B
12
1
secondary air regulator
9900-973A
13
1
baffle plate
3711-170A
14
1
right vermiculite brick
6081-736
15
1
left vermiculite brick
6081-744
16
1
back panel
4290-1199
17
1
log guard
4290-1216A
18
1
log guard rail right
7911-1212
19
1
log guard rail left
7911-1211
20
1
riddling rod
9900-978
21
1
oscillating grate
4290-1201A
22
1
grate frame
4290-1200A
23
1
ash pan
9900-974
24
1
tertiary regulation plate right
5111-410
25
1
tertiary regulation plate left
5111-411
26
1
cast iron door
4490-1385
27
1
glass gasket (8x3)
1982-004
28
1
door rope (D10)
1982-012
29
1
locking rod door handle
5035-405
30
1
glass
5540-312
31
4
glass retaining brackets
6612-241
32
1
door handle
9900-1142
Vermiculite set
9900-1092

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.
This manual is correct at time of printing.
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 (HETAS) 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 consumables 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.