Recent content by JrB

Hi, My CH system consists of a Potterton Prima 40F gas boiler, Myson Compact CP53 pump (3 speed), Sunvic SD 2701 motorised valve, Sunvic SP50 timer, thermostat to control the hot water on immersion tank, no room thermostat. The problem being that the CH is not heating the rads but the HW...