5 | Servicing the system
72
B1510622_en | Operating instructions Firewood boiler S4 Turbo
5.6.2 Create the measurement conditions and perform the measurement
r
Fill the boiler approx. 1/4 full with small pieces of split wood in accordance with the
operating instructions and heat up
Ä
TIP: The smaller the wood is split, the better and faster the bed of embers forms
r
Ensure that the operating conditions are fulfilled
Ä
Return temperature min. 60 °C, boiler temperature min. 70 °C, chimney draught in
the range of 8-10 Pa
NOTICE! Exception for return temperature: Boiler with Thermovar valve and valve
core 55°C (boiler manufactured before 2010)
r
Allow the fuel to burn off until a basic firebed is achieved
Ä
This will take at least one hour depending on the fuel used and the power
consumption
r
Open the fuel loading door, distribute the embers evenly with the furnace tool and
gauge the height of the embers
Ä
The top row of holes in the combustion chamber guards must be visible
r
Close the fuel loading door
Once the basic firebed has been achieved (top row of holes visible in the combustion
chamber guards, the two lower rows of holes of the combustion chamber guards are
covered with embers):
r
With the doors closed, press the chimney sweep button (boiler with button display) or
activate chimney sweep function (boiler with touchscreen) and select the menu item
“FW nominal load”
Ä
The boiler temperature setpoint will be automatically set to 85°C for the duration of
the measurement
Ä
All of the configured heating circuits will be activated at maximum flow temperature
for the duration of the measurement
r
Open the fuel loading door and fill the boiler with the maximum permitted amount of
fuel
Ä
If the boiler has activated reload calculation, the amount of fuel required will be
shown on the screen
r
Close the doors and wait approx. 10 minutes until the combustion process is under
way
r
Take the measurement at the designated measuring port
Ä
The ready-to-measure state is shown on the display
Ä
Regularly check the that the conditions are stable:
- Boiler temperature > 70 °C
- Flue gas temperature around 170 °C