Central heating balancing

[onlygeezer]

Could anyone please help and suggest some tips - guidelines regarding how to balance a heating system- gas central heated house
I have hot and cold rooms

There are 12 rads, TRV valves, new pump fitted, condensing boiler,
I have also noticed tapping sounds at certain times in the feed pipe - especially when the system warming up- located near to the boiler itself.
Is this just metal expanding ??? or trapped air.....
I have bled the rads and all are full of water

Any help & suggestions would be greatful

Kind regards

adam

 

[SimonG]

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