Replacement of Filling loop NRV

[ChrisinShropshire]

P1140199

• ChrisinShropshire
• 17 Nov 2016

I have a sealed system. I noticed that the last time that I had to introduce fluid (Sentinel) into the system, there was a seepage from the spindle of the ball valve on the system side of the filling loop. This might well last for years before it becomes anything more than a seep.
But, planning ahead....I presume that I will need only to drain away a few cupfuls of the water from the system before I can unscrew the NRV and replace it. As it is at the highest point of the system, I presume that I need drop the water level 1cm and vent off the air pressure in the red tank.
Once I have replaced the valve, I connect up the filling loop and carefully fill the system until the pressure gauge reads about 1,5 bar

I do not want to have to introduce any more air into the system that I need to. We spend so much time chasing it down and bleeding it off.

Thanks in advance for any help.


Chris

 

[Steelmasons]

...crack on..you don't mention replenishing the "air pressure" that you removed from "red tank"???
Call someone who knows what they are doing..

 

[picasso]

You have got the nrv and the fill valve on the wrong way round, the nrv should be on the cold water side and tap on the system side.