2 Zone System , pressure

[da3533]

Hi

just installed 2 zone valves working with with two heating hives. Everything is correctly placed. I haven’t yet pressurized system….

quick question, when I start up the system, etc, both zone valves will be closed… but I would need to pressurise the system via filling loop… so I take it this still work with valves closed as loop passes water from mains to return pipe…
So I don’t need to manually open the zone valves to pressurize the system right ?

 

[ianmcd]

The valves have manual levers on them for filling the system, you need to set these to manally open when filling, dont have the power on when filling

 

[da3533]

The valves have manual levers on them for filling the system, you need to set these to manally open when filling, dont have the power on when filling

Ok. But would I know how much pressure there is without the boiler on?

 

[ianmcd]

should have a manual guage, which boiler is it, some only give digital pressure if yours is one of them , just make sure no heating or HW demand on , you dont want the boiler or pump coming on as you are filling it

 

[da3533]

Vaillant ecofit pure

 

[ianmcd]

yes you will need the power on with that one , bad design

 

[da3533]

yes you will need the power on with that one , bad design

well I’m using Drayton za5 2 port valves for both zones… so just have to override both.. thermostats will be off that the time too..

 

[DP]

Have you checked if the boiler needs a bypass