Hi,
I need to install TRV on 3 rads in my flat. I'm looking at my Danfoss HIU (picture attached). I cannot workout how can I top up the pressure if I were to drain the system to install the TRV. I might need a filing loop for this.
Anyone familiar with this HIU?
Another question, would it be possible to not drain the system to install the TRV for this HIU?
Thanks,
I need to install TRV on 3 rads in my flat. I'm looking at my Danfoss HIU (picture attached). I cannot workout how can I top up the pressure if I were to drain the system to install the TRV. I might need a filing loop for this.
Anyone familiar with this HIU?
Another question, would it be possible to not drain the system to install the TRV for this HIU?
Thanks,