9
EN
TECHNICAL PASSPORT INSTALLATION and OPERATION MANUAL
Boiler settings do not change. No pyrolytic combustion.
1 Boiler doors don’t close well.
1. Check sealing rope and replace if necessary. Boiler doors
must be closed by applying light pressure in order to ensure
proper sealing.
2. Secondary and primary air flaps are not adjusted
correctly.
2. Adjust primary and secondary air flaps depending on the
heating value of the wood.
3. Significant soot and tar deposits on the fan turbine
hinder its normal operation.
3. Contact authorized service to carry out the cleaning the
fan and its turbine. Check that the boiler does not operate
for an extended period of time in reduced output mode or
burn fuel with high moisture content.
Boiler water too hot, heating bodies too cold
1. Hydraulic resistance is too high.
2. Air in the system
3. Inoperable circulation pump
Make sure the circulation pump has been properly selected
and the heating installation is of the proper dimensions.
(You must contact your installer.)
Fan not working
The boiler has reached the maximum set
temperature.
Allow the boiler to cool off. After the temperature in the
boiler has decreased, the draught fan restarts.
Significant soot and tar deposits on the fan turbine
hinder its normal operation.
Contact authorized service for cleaning the fan and its
turbine. Check that the boiler doesn’t operate for an
extended period of time in reduced output mode or burn
fuel with high moisture content .
The STB safety thermostat has been triggered.
Upon reaching a temperature of 95°С, the thermostatic
safety protection device is triggered and the fan is turned
off. To resume protection, remove the black cap on the
front panel of the boiler and press the button on the STB-
thermostat.
Contact your installer to determine the cause of protection
triggering.
Boiler temperature too high. Controller failure
Grid power fluctuations
It is mandatory to assure a backup power generator of
corresponding rated power! (see 11.3)
Power failure
9. CONTROLLER
The ST–81i controller is intended for use with
central heating boilers and is used for controlling
the central heating water circulation pump, hot
consumption water pump and blow (fan). The ST-
81i is a PID-based controller using a continuous
signal. In this type of controllers, the fan power is
calculated based on boiler temperature and flue gas
temperature measured at the boiler outlet. The fan
runs continuously and its power depends directly
on the measured boiler temperature and flue gas
temperature as well as the difference between the
two parameters and their setpoint values.
*
ATTENTION! HIGH VOLTAGE! Make sure the
regulator is disconnected from the mains
before working on the power supply (cable
connections, device installation, etc.)!
*
All connection works must only be carried
out by qualified electricians.
*
Improper cable connections may damage
the regulator!
*
The device may be damaged if struck by a
lightning. Make sure it is unplugged during
the storms.
*
It is mandatory to assure a backup power
generator of corresponding rated power!
(see 11.3)
9.1. Controller`s view. Explanation of buttons and
indicators.
Advantages of zPID
controllers include their
ability to maintain a stable
setpoint temperature
without unnecessary
over-regulations and
oscillations. By fitting the
controller with a flue gas outlet sensor, you can save
from a few up to several percent of fuel, and ensure a
