The pipes are used to make the hydraulic connections between the connections on the right/middle top/front of the HYDRO B(A) boiler and the pre-mounted pipes of the DHW and DCW in the wall against which the HYDRO (B)A boiler is placed.
Explanation
SET_HYDRO B HW-CWSet of connection pipes for the DHW and DCW on the HYDRO B(A) water heater