Underfloor heating problem!

[jay wild]

Hi all,

Having trouble wiring up a two zoned wet underfloor heating system which is part of a manifold and controlled by one 4 wire actuator. Ive wired the room stat controlling both zones as normal (which is working), but then i'm unsure how to incorporate the connections for the "NC" 4 wire actuator, manifold pump and boiler switch wire as i've never done one before and not familiar with this! If connecting the actuator (brown and blue-stat switched live and neutral), the other two wires (brown and grey) are giving out 5 volts! In the case where i connected the actuator this way (not incorporating the grey and black to any terminals), the pump and boiler s/w, then it does work but when either the heating or water calls it triggers the underfloor. Would i need to get an underfloor relay as the plumber did not provide one? Any help would be appreciated!!!

 

[Toneyz]

Any photo's /make modal of components etc..

 

[Wilko]

Hi - have you got a diagram to follow - hunt one up on internet?
I'm by no means an expert on UFH but I'm thinking to connect the UFH pump with the brown to the UFH zone valve. That way the UFH pump is starting as the valve is opening and running when UFH zone valve has opened and it's orange sends power to the boiler and the boiler pump starts. If that makes any sense pre coffee

 

[Sparkie30]

You have and a s-plan plus.
From that actuator you need know which cable is pl sl and fires the boiler.
Wire pl and n as you normally would, then from your timer wire sl and l of manifold pump together.
Then from actuator connect the cable that fires boiler with boiler.

Hope it helps

 

[jay wild]

Hi all,

Having trouble wiring up a two zoned wet underfloor heating system which is part of a manifold and controlled by one 4 wire actuator. Ive wired the room stat controlling both zones as normal (which is working), but then i'm unsure how to incorporate the connections for the "NC" 4 wire actuator, manifold pump and boiler switch wire as i've never done one before and not familiar with this! If connecting the actuator (brown and blue-stat switched live and neutral), the other two wires (brown and grey) are giving out 5 volts! In the case where i connected the actuator this way (not incorporating the grey and black to any terminals), the pump and boiler s/w, then it does work but when either the heating or water calls it triggers the underfloor. Would i need to get an underfloor relay as the plumber did not provide one? Any help would be appreciated!!!

Any photo's /make modal of components etc..

Actuator is mollenhoff and stat is a heatmiser neo

 

[jay wild]

Hi - have you got a diagram to follow - hunt one up on internet?
I'm by no means an expert on UFH but I'm thinking to connect the UFH pump with the brown to the UFH zone valve. That way the UFH pump is starting as the valve is opening and running when UFH zone valve has opened and it's orange sends power to the boiler and the boiler pump starts. If that makes any sense pre coffee

It’s not a zv, it’s an actuator no orange wire unfortunately-brown, Blue, grey and black

 

[jay wild]

You have and a s-plan plus.
From that actuator you need know which cable is pl sl and fires the boiler.
Wire pl and n as you normally would, then from your timer wire sl and l of manifold pump together.
Then from actuator connect the cable that fires boiler with boiler.

Hope it helps

Yes what you are saying makes sense to a degree, but from a diagram on the internet (not instructions provided) it should be more simple