Newmans Newburn User manual

WOODFIRED CENTRAL HEATING FURNACE
INSTALLATION
and
OPERATION
MANUAL
METALFAB
125 WILSON ST BURNIE TASMANIA
Telephone - 03 6431 4766
Facsimile - 03 6431 6811
Email – [e-mail]

INSTALLATION INSTRUCTIONS FOR ALL NEWBURN WOOD FIRED HEATING
UNITS
GE ERAL
The installation of the EWBUR should be carried out by a competent tradesman with experience
in Central Heating and Flue installation. The installation must comply with the AS 2918 (Domestic
solid fuel burning appliances - Installation) applicable Building Regulations, local Electrical Authority
Regulations and any other relevant Statutory Regulations.
A notice of intention to install may be requested by the local Municipal Authority.
The ewburn is suitable for burning dry wood only and is not designed to burn briquettes or coal.
Severe damage will result if fossil fuels or accelerants are used.
I STALLATIO
Where local regulations allow, the ewburn can be installed internally.
Example - In a storeroom or under the dwelling provided that there is a minimum 50mm air space
around the sides, back and above the unit from combustible surfaces. Also the unit should be
installed on a level concrete slab of not less than 50 mm thickness.
FLUE I STALLATIO S
The flue must be 150 mm diameter of 0.6 mm, stainless steel and all joints be sealed and lapped so
that the lower section of flue is entered into the top section of the adjoining piece. This will stop any
condensation or creosote leaking out of the horizontal joints. The flue should be a minimum of 3.6 M
high triple flue system in accordance with the requirements of AS2918.
Offsets in the flue should be avoided wherever possible. Where unavoidable, the offset should be of
a maximum of 45 degrees and as short as possible,
The flue will require maintenance during the lifetime of the heater and should not be built in to an
inaccessible position.
Fit a cap to the flue to prevent rainwater entry when the central heating unit is not burning as water
combined with creosote deposits inside the flue are highly corrosive to the firebox.
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THERMOSTAT LOCATIO
For central heating applications a room thermostat is recommended to provide automatic
temperature control and efficient operation.
The thermostat should be mounted on an inside partition wall clear of drapes, heaters, doors and the
effects of external windows. Generally the thermostat is placed in the main living area.
The thermostat controls the output from the heater by activating the combustion air damper. When
the thermostat calls for heat the combustion air damper opens which allows the fire to build up to
maximum temperature. When the room reaches the desired temperature the thermostat closes the
combustion air damper allowing the fire to reduce to slow combustion.
SUPPLY DUCTWORK
The ductwork must be fabricated from non combustible material, thermally insulated and designed
not to restrict the total air movement to the outlets and in no case start off less than 350 mm
diameter.
It is essential that at least five 300 x 100 floor outlets be left open at all times otherwise the ewburn
will overheat which will cause damage to the heat exchanger.
The ductwork must be designed to recognised standards and installed by competent tradesperson
with experience in this field to ensure correct operation.
RETUR AIR DUCT
For maximum economy it is recommended that a minimum 350 mm diameter return air duct be
connected to deliver room air back to the furnace for reheating. The return air duct should be
insulated for noise absorption and thermal insulation and connected into the side or rear of the fan
compartment.
Return Air is best collected at low level from within the house.
( ote : Return Air Grille not supplied with furnace).
ELECTRICAL REQUIREME TS
The heater requires a power supply to operate the combustion air damper motor and supply air fan.
Power supply to be 240 volts/50HZ.
A dedicated hard wired connection is recommended to avoid inadvertent switching off or unplugging
as may occur when connected to a general power outlet. Ensure the power supply is always
switched on prior to lighting the furnace.
It is important the room thermostat wiring circuit operates the combustion air damper only.
Control of the supply air fan is temperature actuated by the inbuilt heat exchanger thermostat
(Honeywell fan/limit controller) which is mounted on the right front of the ewburn.
Ensure this is set on Auto mode (out).
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MAI TE A CE
The important thing to remember about your EWBUR is that it is a woodheater. As such it has the
same potential problems and maintenance requirements as any woodheater.
Check regularly that the combustion damper is working correctly and is unobstructed.
Check that the firebox door gasket is intact and sealing correctly.
Check the Return Air filter is clean or replace.
Clean out the ash regularly to prevent excessive build-up and obstruction of combustion air
intake.
Check the condition of the firebricks and baffle plates.
Inspect and clean your flue at least annually.
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OPERATING INSTRUCTIONS FOR ALL NEWBURN WOOD FIRED HEATING
UNITS.
FUEL
The EWBUR is suitable for burning split wood and logs only. Do not use other fossil fuels,
wastepaper, briquettes etc. Seasoned, dry firewood should only be used. The fuel quality is directly
linked with the economy of the EWBUR system and its reliability. Poor fuel will jeopardise the life
of the firebox and fire bricks. Do not use green wood as it will cause excessive build up of creosote.
LIGHTI G THE FIRE
If the EWBUR has been used previously, clean out any excessive ash build up before re-lighting.
Ensure the power supply is on and turn the room thermostat up above room temperature and the
combustion air damper will open. Place several pieces of crumpled paper in the bottom of the firebox
and cover with dry kindling and a few pieces of split wood. Do not use flammable liquid to start the
fire. Light the fire, then close the firebox door. Ensure the room thermostat is turned up to set point
(21 degrees)
RE-FUELLI G
Crack open the firebox door for a few seconds before slowly opening fully.
Place wood in the firebox with care to avoid damage to firebrick lining. Space pieces of wood to
allow air circulation between them. Close the firebox door tightly. DO OT OVERLOAD THE
FIREBOX. The wood should not be placed higher than halfway up the fire door opening. Care taken
in loading will extend the life of the firebrick lining which must be replaced if showing any signs of
deterioration.
COMBUSTIO AIR DAMPER OPERATIO
The Combustion Air damper is the heart of the EWBUR as it controls the amount of air for
combustion and therefore fire size. The damper is controlled by the room thermostat to open when
the room temperature falls below what the thermostat has been set and to close when the desired
temperature is reached. A High Limit thermostat to override the room thermostat and close the
damper if the heat exchanger starts to overheat is also incorporated. The room thermostat will
operate normally again once the heat exchanger has cooled down.
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SUPPLY AIR FA OPERATIO
The Supply Air Fan is automatically controlled by an inbuilt furnace thermostat to operate only when
the fire box temperature is sufficient.
It may therefore cycle on and off, particularly during slow combustion periods, in response to the
firebox temperature.
The Honeywell Fan/Limit Controller mounted on the left front of the furnace, provides this function
and is factory set to turn the Supply Air Fan on at 60 C off at 40 C and activate the hight limit
Combustion Air Damper shut-down at 85C.
If the Controller fitted to your unit is Fahrenheit Scale the Setpoints are 100F, 140F and 185F.
Ensure the switch on this controller is in the Auto (out) position.
(In manual mode the fan will run continuously which is undesirable).
OVER IGHT BUR I G
For successful overnight burning it is essential that there is a moderate fire already burning before
loading the firebox with DRY wood. Turn the room thermostat back to its lowest setting. The furnace
will now burn on low fire for approximately 6 to 8 hours.
IMPORTA T
Long periods of slow combustion are detrimental to woodheaters. At least once every 24 hours the
furnace must be used on high fire for a while to burn away any residue formed by continual low fire
burning in the same manner a conventional wood heater would be operated.
It is also important to ensure the heater is operating at high temperatures when under load conditions
to prevent excessive creosote generation.
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DO’S AND DON’T’S
Do not burn green firewood
Do not overload the firebox
Do not use the heater to burn rubbish
Do not leave the heater unattended with the firebox door open
Do not allow ash to build up so that the red hot coals are burning against the steel sides of the heat
exchange. If this is allowed to happen severe buckling and cracking may take place. Remember it is
essential to keep the coals well below the top of the fire bricks.
Do not burn COAL or BRIQUETTES. Heat exchanger failure will result.
Do not open fire box door if there is a power failure.
Do not jam open the Combustion Air Damper.
Do replace the fire bricks, baffle plates and door gaskets when damaged to protect your firebox.
POWER OR FA FAILURE
In the event of a power failure while the heater is in operation the combustion air damper will close
reducing fire intensity.
This safety function is critical to avoid overheating and damage to the firebox.
Ensure that the combustion air damper door is closed and un-obstructed.
Do not open the fire box door in this situation. If the door is opened the fire will build up and
overheating will occur.
It is recommended that if the supply air fan fails, turn the wall thermostat down, to ensure that the
combustion air damper remains closed off and the fire burns out until you are ready to restart the
system after repairs.`
If you are concerned about overheating with a fan or power failure, quickly douse the fire with a small
amount of water and close the firebox door.
In the event of overheating the furnace check carefully for damage before re-using.
The Honeywell Fan/Limit controller (on the front left of the furnace) can become out of calibration
when overheated. Calibration can be checked, when the furnace has completely cooled, by
removing the cover and reading the temperature scale on the dial at the 6.00 o’clock mark of the
housing. The reading should correspond with the ambient temperature at that time.
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CLEANING OUT YOUR NEWBURN
THIS JOB IS BEST DO E AFTER A OVER IGHT BUR .
1. Allow the fire to burn down so there is not much unburned wood left and turn down the room
thermostat.
2. Open the firebox door and using a metal fire shovel push the hot coals to one side of the
firebox through opening and scrape the remaining ash out into a metal container, leaving
unburned wood and hot coals to one side.
3. Scrape the unburned wood and hot coals back to the other side of the firebox and then
remove the remaining ash. This ash will be very hot. Handle and dispose of it carefully.
4. Reposition the hot coals and unburned wood centrally and reset the fire with kindling and more
wood. Close the firebox door.
Reset thermostat to required temperature.
5. Periodically allow the heater to go out in order to inspect the firebricks.
Cleaning should be done on at least a weekly basis when using the Furnace continuously.
Ash build-up will depend on usage and the quality of the firewood used but it is essential not to
permit the ash bed from building up and obstructing the primary combustion air inlet.
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GUARANTEE
Any part found to be defective in workmanship or materials within 12 months of date of purchase, will
be replaced free of charge within 20km of the retailers’ premises. Purchases from other areas will be
responsible for traveling time and mileage.
CO DITIO S OF GUARA TEE
The Heater will be installed and operated in compliance with local statutory regulations and the
manufacturers’ instructions.
A charge will be made for repairs to damage caused by burning coal or briquettes, neglect, abuse or
accident. o responsibility will be accepted for damage caused, directly or indirectly, by incorrect
electrical wiring, by incorrect installation or operation of the Heater. The guarantee will not be
recognised unless the form below is filled in and returned to the manufacturer.
WARRANTY REGISTRATION
NEWBURN WOOD FIRED CENTRAL FURNACE
Serial o. Date of Purchase
ame and Address of Owner
ame and Address of Installer
ame and Address of Electrician
Return this form to: EWMA S METALFAB
PO BOX 646
BUR IE TAS 7320
PHO E O. [phone]
FAX O [phone]
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