Hi,
I have a Keston C55 which has been running happily for 3.5 years (unusual, by all accounts) - but when installed it only had a manual bypass fitted - which was too short and caused some problems.
So when I had to have some major work done on the boiler (Heat Exchanger replacement ) I decided to fit a Honeywll DU144 auto bypass valve with a small radiator to provide a big enough bypass circuit.
However, I can't find out what the minimum flow rate through the boiler is to set the ABV. Keston's customer service is pretty poor - they don't bother to answer e-mail queries - and I was wondering whether anyone would know how to calculate the setting? It's a sealed system running at about 1.6 bar - but the graphs and instructions in the Keston manual and the ABV instructions don't seem to match up.
Grateful for any help!!
D...
I have a Keston C55 which has been running happily for 3.5 years (unusual, by all accounts) - but when installed it only had a manual bypass fitted - which was too short and caused some problems.
So when I had to have some major work done on the boiler (Heat Exchanger replacement ) I decided to fit a Honeywll DU144 auto bypass valve with a small radiator to provide a big enough bypass circuit.
However, I can't find out what the minimum flow rate through the boiler is to set the ABV. Keston's customer service is pretty poor - they don't bother to answer e-mail queries - and I was wondering whether anyone would know how to calculate the setting? It's a sealed system running at about 1.6 bar - but the graphs and instructions in the Keston manual and the ABV instructions don't seem to match up.
Grateful for any help!!
D...