1. S

    Alpha cd28c pressure not increasing when heating is on

    Pump runs, hot water going into central heating pipe, first 3 rads getting hot water but last 3 rads warm at the inlet but rads cold. Hot water is working ok. when the heating is on pump is running but only about an eighth of a bar increase in pressure. I'm thinking that there is not enough...
  2. R

    Alpha CD28C

    Hi we have an alpha cd28c which was installed in 2009 and been fine, we get it serviced each year and all okay. Now its getting colder we switched on the heating which is working fine, the problem we are having is that when the heating is on the Hot water is luke warm at best and a shower or...