Installation, Operating and Service Manual
For safe installation and operation of your pellet Fire, read and follow the safety instructions on pages 5 & 6 and
throughout the manual.
© 20.3.2011 Firemakers Limited Page 12
Air Supply Consideration
1
Parkwood fires draw air from the room to provide oxygen to the fire. Due consideration must be given to where the
air will come from. Many old houses are draughty with gaps round windows or doors etc. Air flow with such houses
is not usually a problem. Modern newer homes however can be tightly sealed and the heater can be starved of air
if all the windows and doors are closed and there are no other vents. This can be exacerbated if there is an
extractor fan running in the house at the same time so that the heater is fighting for air.
2
It is important to realise that the flue for the fire is a vent to the outside and problems may occur if extractor fans
are used in a kitchen or bathroom in a tightly sealed house if there is no other access point for air. Such extractor
fans can cause damp air from outside the home to be drawn through the fire when the fire is not in use. Outside
air can be damp or salt laden if the property is near the sea and can cause corrosion in the firebox if drawn down
the flue.
Failure to prevent back venting through the heater will void the warranty on the firebox
.
POSITIONING OF THE PELLET FIRE
1.
Position the Fire in a large open room that is centrally located in the home. Direct the Fire so that the Convection
Fan will blow hot air into the area that requires heating. For example:
Try not to position the Fire so that the Convection Fan blows air into a wall or opposite an exterior door.
If possible, position the Fire on an exterior wall and direct the Fire to an interior door so that the Fire will firstly
heat the principal room, then fan force centrally heat other areas of the home when the interior door is opened.
2.
Check clearances from combustibles.
3.
Check the location of the power point.
4.
You can flue the Fire internally (check for structural beams and trusses where the proposed flue passes through
the ceiling), externally behind the Fire or flue an existing masonry chimney with a 75mm stainless steel inner
flue.
5.
All single skin Flue Components must have 75mm safe clearance to combustibles. Double skin flue components
must have 25mm safe clearance to combustibles.
DESIGNING A FLUE
Pellet Fires have more installation options than any other solid fuel appliance. Standard installations are illustrated
below. Variations to the standard installations are perfectly acceptable when considering the following;
All Parkwood Pellet Fires must have a minimum vertical flue length of 1.2m to prevent poor performance of the fire or
smoke entering the room during a power failure.
Once the positioning of the Pellet Fire and the installation type has been established it is important that you design a
flue system that ensures gas velocity and temperatures are maintained. If the flue system is too long, contains
excessive horizontal sections or several elbows, the exhaust fan may not be able to overcome the resistance offered
by the 75mm system and the gasses may cool and form creosote in the flue system before they are vented. The fire
may perform poorly as a consequence of this.
Parkwood strongly recommends that the installation configurations illustrated in this manual are adhered to.
Restrictive Flue Designs
Gas leakage is more likely where the system design or other problems cause high pressure in the flue. Short flue
systems may produce low pressures and less likelihood of leakage. One of the most restrictive aspects of a pellet
flueing system is a horizontal section. Horizontal runs of pellet flue should not exceed 1.2m. Where the flue system
incorporates several elbows or is very long, it may be advisable to increase the diameter irrespective of the equivalent
length calculation. The larger flue will allow the same amount of gas to flow, but at a lower pressure. Also, keep in
mind, that a relatively long system that is all vertical may not be restrictive because of the natural draft assistance.
Refer to an authorised Parkwood Distributor for advanced restrictive flue designs.
