Heat exchanger and underfloor heating problems

[AlexTarchitect]

Hi everyone,

i'm having some pretty annoying problems with my UF heating.

We have a new apartment with communal CHP. Inside the flat is are; uponor actuators and control junction box thing. A Danfoss plate heat exchanger (I think) and a Nuair heat recovery unit.

Basically, we don't have heating in quite a few zones within our flat and I can't work out why, but I've never had all this gubbins before and I'm a bit confused. The PSI / bar gauge is pretty low in the picture which leads me to think that there is not enough pressure in the system to hear all the zones, but I can't work out why.

it could be the pressure from the communal boiler, or it could be my issue. Anyone know what might be going on?

Upon further investigation, i lowered the heating to zero in the hallway and bathroom [which were getting some heat] and now the kitchen floor is getting warm. Sounds like a pressure issue to me.

[DLMURL]https://docs.google.com/file/d/0B-haSGCJYByRV21jX3ZUWmlvV3M/edit?usp=docslist_api[/DLMURL]

[DLMURL]https://docs.google.com/file/d/0B-haSGCJYByRb09tMmZoeUFtbjA/edit?usp=docslist_api[/DLMURL]

[DLMURL]https://docs.google.com/file/d/0B-haSGCJYByRc01ONGZuUF9tMk0/edit?usp=docslist_api[/DLMURL]

 

[PhoenixServices]

Is there more than one pressure gauge? These systems are sometimes split by a plate into communal and individual flats.
If that is the pressure gauge for your flat there should be a filling loop.

 

[Ermintrude]

Should still work at 1/2 bar? Fill it up and balance zones out so even heat?