Hi
I have read that to charge a CH expansion correctly that I have to drain off the CH water until the pressure makes sense so that you can read simply the air pressure in the expansion vessel.
I understand the reason but I am loathed to drain some of the CH water off as I have just managed to get all the air out of the system.
Do I have no option but to drain some of the water or is there perhaps a rule of thumb than can be applied ?
Cheers
I have read that to charge a CH expansion correctly that I have to drain off the CH water until the pressure makes sense so that you can read simply the air pressure in the expansion vessel.
I understand the reason but I am loathed to drain some of the CH water off as I have just managed to get all the air out of the system.
Do I have no option but to drain some of the water or is there perhaps a rule of thumb than can be applied ?
Cheers