Underfloor wet system design query

[nigel52]

I have a OMNIE designed wet underfloor heating system on three floors. Ground and 2nd floors work well with those two floors having a single manifold and recirculating pump for the various zones.
On the 1st floor the rooms are split over two manifolds each with its own recirculating pump. However, the dressing room and en-suite shower room which is two zones controlled from one wall thermostat/control is split between two manifolds.
When I call for heat one actuator on one manifold switches on and the recirculating pump starts. However, the 2nd zone to the other actuator and manifold does not seem to activate in that the recirculating pump does not activate and the control box for that manifold does not light up indicating it is activated although the actuator nipple rises. Pipes remain cool.

I have attached photos of manifolds and floor design. My question is why split common zones over two manifolds and two recirculating pumps? This does not seem a good design or cost effective.

Has anyone got a view on this please.

 

[ShaunCorbs]

Are they on there own stats ?

 

[nigel52]

so the dressing room and ensuite has one room thermostat which is in the dressing room. I’ve tried turning this right up to actuate both zones but only the dressing room heats up. They are right next to one another.

 

[ShaunCorbs]

Well yes then wrong need to speak to the installers to see if they have missed a stat off if not they need to be linked etc

 

[nigel52]

Thanks I think they should be linked.

 

[nigel52]

Thanks I think they should be linked.

OMNIE have confirmed my installer has wired this up incorrectly as I had surmised.

 

[ShaunCorbs]

OMNIE have confirmed my installer has wired this up incorrectly as I had surmised.

Wired and plumbed up as really the same zones should be on the same manifold