SERVICE AND MAINTENANCE
25
7.3.
Basic service procedures
7.3.1.
Service after overheating
If overheating occurs, the safety valves of the boiler must open. If the boiler is equipped with
an overheating protection coil, cold water will enter the coil to protect the boiler.
Make sure the boiler pump is working. In case of blackout open all the valves of the system to
let hot water out of the boiler. In any case a blackout protection UPS is recommended to be
installed on the boiler pump.
If the chimney damper is not fully opened, put it in fully open position.
All safety devices must lead to drainage! After overheating, make sure that all the water from
the safety devices has drained, and the system has filled with cold water. Check the pressure
and the temperature of the boiler.
At overheating, the safety thermostat will activate, and cut electrical supply to the fan. In that
case, you need to manually reset the safety thermostat and put the system back in function.
Unscrew the plastic cover of the safety thermostat and press the switch. Put the plastic cover
back.
Verify the causes of the overheating! If it happens again, check the installation
and function of the pumps and safety devices!
7.3.2.
Service after feeder blockage
If a blockage occurs to one of the feeders, you will have to remove the axes in order to clean
the feeding tubes. The same procedure is applicable at the annual maintenance procedure.
Before proceeding to any of the following steps, make sure the boiler function is
stopped, the boiler is cool, and it is disconnected from the electricity. Do not try to do
any works while the motor is working and the control panel is activated! Risk of
injury!
REMOVING THE UPPER AXIS
Remove the protection cover of the transmission system.
Remove the two gears from the axes by unscrewing the headless inserted screws keeping
them in place.
You do not need to unmake the chain! Remove them all together with
the chain.
Unscrew the four nuts from the back side of the flange (see Fig 15)
Fig 15.
Removing the upper axis flange
