2.4.4
Single boiler application with a frequency converter
This example shows which inputs/outputs on the EBC20 need to be connected to a frequency converter if the
chimney fan is to be controlled by such a unit:
• Connect the supply voltage to terminals 1–3
• Frequency converter:
Connect terminals 7 & 8 to the start/stop input on the frequency converter
Connect terminals 21 & 22 to the frequency converter input for external speed regulation
Terminals 26 and 28 can be connected to the frequency converter alarm output
• Connect the pressure transducer (XTP) to terminals 23–25 using a a shielded cable 3x0,75 mm
2
and con-
nect the cable shielding to the cable bracket
• Connecting the boiler:
Connect the burner start signal (L) to terminal 11
Connect the neutral wire to terminal 12
Loop terminals 11 and 13
The start signal for the burner is sent from terminal 14
3002878-EBC20-UK
20
• Pressure control