i replaced three radiators two in a bedroom and one downstairs in the diningroom, some times all the radiators work or only afew up stairs and down stairs, help :(
You need to adjust the lock shield valves so that there is a temp drop of about 11 degrees C across each radiator. You can either use clip on rad thermometers for this or an infra red thermometer or some peeps have been doing it so long they know the difference using their hand.
If you have TRVs remove the heads. Close down all LSVs and let system cool. Balance flow and return temps at boiler first - again approx 11 deg C drop using pump speed to regulate.
Starting with the first rad to get warm when the system fires up open up the LSV until you get the 11 deg difference between flow and return. Then move onto the next until you have done them all.
Your system is now balanced. Replace all TRV heads.
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by yacoobpatel » Mon Mar 02, 2009 2:02 pm 
by keratos » Fri Dec 06, 2019 12:24 pm
