Is this OK or am I doing damage to my boiler somehow? The set up is:
British gas 330+ (min flow rate of 600l/ph quoted for 10kW lowest modulation)
Grundfos 15-60 130 super selectric pump (on lowest setting, max 2.2 metres head)
Flow temperature - 71c
Return flow - 50c
8 radiators
3 bed...