Osma ufh problems

[jimk280]

Hi does anyone know of any technical helpline for OSMA UFH? Customer has 2 loops (same room) on a large manifold that don't appear to work. The actuators appear to work (blue band) showing when the stat is calling but that's about as much as I know on this system. Anyone had this problem before? Thanks Jim

 

[townfanjon]

Like a TRV , screw off the actuator/s. Is pump running ?

 

[Ermintrude]

Is there heat at the blending valve? Is there a two port? Has it ever worked?

 

[jimk280]

Hi guys, no two port valve that I've seen (like used on uponor). I did pull off the actuautors to see if / how they operated. the pump is rumning because other circuits fro the manifold are working.

A mate today said take the actuators off for 24 hours and see what happens with the system running. Seems sensible but didn't want to return unless I'd researched it a bit better. The actuators are like a clip fitting in that you press a centre clip and gently lever it off.

Thanks

Jim

 

[jimk280]

There's heat at the blending valve, all loops working apart from 2 that feed one room. There's a programmable stat in each room and the one in the cold room is calling and the actuators are visually working. Seems too much of a coincidence that the two failed actuators (of 8 that are on the manifold) feed the same room? a bit baffling.

 

[Gray0689]

Are the flow regulators turned off

 

[Ermintrude]

Relay on stat or in wiring center. Take two heads of another zone and put them on cold one. Bet it heats up, put them on the "working" zone bet cold

 

[jimk280]

No I did fully opened the flow regulators..no change. I'll try Ermintrude's suggestion are the items for this system still available? A bit of a look on google and Wavin appears with OSMA??

 

[Gray0689]

Osma Wavin stuff is re branded heatmiser
And pins are not stuff closed!

 

[jimk280]

Thanks Gray

not sure what you mean by 'and pins are not stuff closed?'

 

[jimk280]

Thanks Gray

not sure what you mean by 'and pins are not stuff closed?'

Got it - stuck closed. No I've checked the pins. They move up and down when pressure's applied so I have to assume they're working. I take it with the pin pushed down the loop is opened up so heats the room and with the pin free to move up the loop is closed and so no heat?

 

[Gray0689]

Pin fully down off
Up on

So if you take the actuator off its open

 

[jimk280]

Excellent . Thanks for replying. Jim

 

[markfxy]

connect hose to manifold flush out the two circuits that aren't working, might be full of air

 

[jimk280]

connect hose to manifold flush out the two circuits that aren't working, might be full of air

Thanks Mark. I'll give that a go

Jim