ARITERM SWEDEN AB
•
ARITERM OY
• Asennus ja käyttöohje • Installation och driftanvisning • Installation and operating instruction • UK 25.05.2012 •
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ARITERM-VTT-S-07229-11.1
1. Combustion vessel
2. Flame detection system
3. Level switch, receiver
4. Upper connection
5. Level switch, transmitter
6. Blower
7. Auger burner
8. Blocking feeder
9. Drive motor
10. Wheels and chain (not in the figure)
11. Primary air pipe
12. Connector panel
BURNER PARTS
The settings for combustion and burner operation can be found in the Power menu.
Combustion adjustment
In most cases, the factory settings are sufficient for proper and efficient combustion. In addi-
tion, they can be applied when the underpressure in the combustion chamber is about 8-15 Pa
and the pellets used have a diameter of 8 mm. In connection with commissioning, it is recom-
mended that the values be adjusted by a skilled installer by means of a flue gas analyser. Carbon
monoxide (CO) should be less than 200 ppm and excess air (0
2
) 6.5-8%.
If combustion is poor, the smoke coming from the chimney is black or if the ash produced is
granular, adjust the ratio of fuel to air from the Power menu. Pellet feeding to the burner head
can be adjusted through the High auger and Low Auger settings. The amount of air required
for combustion can be adjusted through the High Fan and Low Fan settings. The Min settings
are not available.
Adjustment example - External auger operating time
The level switches located in the upper connection of the burner measure the amount of pellet
fuel in the burner and control the external storage auger. When the pellet surface drops below
the level switches, the external auger activates (factory setting 30 s). The operating time of the
external auger should be long enough for the pellet surface to rise to the level of the burner up-
per connection. Time can be adjusted from Auger External in the Power menu. If the time is
too long, the pellets rise to the drop pipe level. In this case, pellets may accumulate in the pipe,
which would cause the Pellet Shortage alarm to be given. If the time is too short, there is not
enough time to bring pellets. As a consequence, the same alarm may be given.
Electrical resistance operation
Electrical resistances can be activated from the Burner Adjustments menu. If a 9 kW resistance
is used, set the setting to 3. In this case, 9 kW will be reached in stages (3 kW -> 6 kW -> 9
kW). If the fuse is not sufficient for 9 kW, the setting should be 2, where only 6 kW is avail-
able.
The Activation Start Backup El setting is used to determine how much the boiler water tem-
perature must decrease with respect to the set temperature before the electrical resistances turn
on (Heating method: p electricity). If the burner has malfunctioned or stopped, the
electrical resistance functions as a source of backup heat. If heat is set to be produced only by
means of electricity, the electrical resistance tries to keep the boiler water at the set tempera-
ture.
For example, if the temperature difference of the electrical resistance is set to 20 ºC, the electri-
cal resistance turns on at 58 ºC as long as the set boiler water temperature is 80 ºC. After heat-
ing the water to 62 ºC, the electrical resistance turns off. Settings: Heating method: p
electricity and El step = 1
BURNER SETTINGS
