
2.4.5
2 boiler application with continuous operation of chimney fan
This example shows how to connect the EBC20 if you require continuous operation of the chimney fan from one or
two boilers:
• Connect the supply voltage to terminals 1–3
• Loop terminals 11 & 15 & 19
• Loop terminals 12 & 16 & 20
• Connection to boiler (example with 2 boilers):
Connect the boiler 1 start signal to terminals 13 & 14
Connect the boiler 2 start signal to terminals 17 & 18
• Connect the chimney fan to terminals 4–6
• Connect the pressure transducer (XTP) to terminals 23–25 using a a shielded
cable 3x0,75 mm
2
and connect the cable shielding to the cable bracket
3002878-EBC20-UK
Pressure control •
21