Balancing radiators on Heat Pump System

[spinnerc41]

My radiators are fed by a Ground Source Heat Pump. On the balancing advice I have seen, it says to have a 12 degree difference between feed and out on a normal heating system.

My question is because the boiler runs at a lower temperature than a normal boiler, what temp difference should I be trying to set?

 

[SJB060685]

You should be aiming for a ∆T of 5-7°c on a heat pump. This should have been done by the installers though.