For diagram clarity the following connections to the Ebac controller have been excluded from the schematic:
- Flow sensor
- Water pump (primary)
- 3-way valve
Note: If your installation includes a buffer tank, two heating zones or a secondary circulation pump, consider the cable runs back to the Passiv Programmer's wiring-centre, where these connections can be easily be accommodated.
Do NOT use the (optional) connections within the Ebac controller e.g. SECONDARY WATER PUMP - (OPTIONAL) (5) nor the ZONE 2 CONTROL (OPTIONAL) connections.
Additionally, if the green RS485 cable runs are longer than 100m, instead of using 1 twisted pair screened cable use 2 twisted pair screened cable, as connecting the GND, A & B between the Ebac indoor unit and the Programmer will require 3 cores.