DK9802C2 PV50c user manual ENG
Vers: C2 page27/38
8.5
Replacing flame sensor
Flame sensor may get dirty or melt in case of back burning. Flame sensor consists of light sensitive resistor
and transparent plastic housing. Housing is situated inside of black rubber nest. For replacement small
screwdriver is needed.
For checking and replacing:
1.
Make sure that burner is disconnected from mains supply.
2.
Remove burner’s covers.
3.
Pull the sensor with rubber cover out of its nest and clean its transparent part with soft cloth.
4.
If sensor is melted unroll its wires out of X4 connector and replace the sensor.
5.
Reconnect the wires. The polarity is not important. Screw terminal must be tightened so hard that
when pulling the wires, they would not come out from under the screw.
6.
Place back burner’s covers and connect burner to mains supply.
8.6
Replacing feeder augers motor
The condition of the feeder auger’s motor is crucial for safety. Failed feeder auger motor may cause back-
burning therefore the motor must be replaced after every 2000 working hours or after 30 tons of pellets
are burnt. Roughtly calculated amount of pellets burnt (in tons and kg) is accessible from INFO menus
submenu COUNTER.
Notice!
Please read through description below. If you find that replacement could turn out more
complicated than expected, please turn to specialist.
In order to replace motor middle size crosshead screwdriver and 4mm inner hex wrench is needed.
To replace feeder auger motor:
1.
Remove burner’s covers.
2.
Loosen and remove 4 tin screws from burner’s body frame and 1 left lower fan screw. See Figure 20.
3.
Release from terminal X3 feeder motors wires and rotation sensor from FDR socket.
4.
Remove body frame.
5.
Loosen and remove 4 bolts M4 what hold feeder motor.
6.
Remove feeder’s spiral.
7.
Mount spiral to new motor.
8.
Place new motor to it place and fasten the bolts.
9.
Fasten 4 tin screws and 1 left lower fan screw.
10.
Connect back motor’s wires and sensors plug.
11.
Place back burner covers
