3.4.1
1 x 2-stage boiler
This example shows which inputs/outputs on the EBC20 need to be connected to a 2-stage boiler:
The boiler outputs for stages 1 & 2 are two potential free contact sets.
• Connect the supply voltage to terminals 1–3
• Loop terminals 12 & 20
• Loop terminals 16 & 20
• Connection to the boiler:
• Connect stage 1 (potential free contact) to terminals 11 and 19
Connect stage 2 (potential free contact) to terminals 15 and 19
Connect the burner start signal to terminals 13 & 14
• Connect the chimney fan to terminals 4–6
• Connect the PDS to terminals 26-28
• Set the value in menu 31 to 1 (PDS connected)
NB: If
is flashing, the EBC20 is preparing for a PDS-check.
3002878-EBC20-UK
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• 2-stage speed regulation
