Underfloor heating query

Joined
17 Sep 2004
Messages
45
Reaction score
1
Country
United Kingdom
Hi. I'm new to underfloor heating, and this may be a silly question, so sorry in advance if it is.
We had an underfloor system put in before laying a concrete floor.
Baxi boiler now installed, and now the manifold, pump, and all the gubbins are wired in.

There are three zones;

zone 1 has one actuator
zone 2 has two actuators
zone 3 has four actuators

Currently only zones 1 and 2 are needed, so zone 3 has no thermostat on it, and looking at the wiring, would seem to not have a power supply to the actuators.

BUT all three zones seem to be running. The floor in zone 3 is warm even though we want it turned off.

Am I missing something? Do I need to put a thermostat on to zone 3 and then set the desired temperature really low just to turn the zone off?

Thanks
 
Sponsored Links
Joined
20 Jul 2005
Messages
7,400
Reaction score
1,962
Location
Nottinghamshire
Country
United Kingdom
If zone 3 has a motorised valve fitted check that the operating lever hasn't been latched in the manual mode. This is there to manually open the valve to facilitate filing the system.

Capture.JPG


If the lever has been left in the manual mode, the zone will heat up when either of the other two zones are operation.
 
Joined
17 Sep 2004
Messages
45
Reaction score
1
Country
United Kingdom
There's one motorised valve for all of them.
Then are actuators for each .
 
Joined
20 Jul 2005
Messages
7,400
Reaction score
1,962
Location
Nottinghamshire
Country
United Kingdom
You don't mean 3 zones then. You mean 3 manifolds all fed via the same Zone Valve, but fitted with 7 actuators in total. (1+2+4)

So, do you mean that the UFH pipes connected to the 3rd manifold are heating up despite the actuators on that manifold not being electrically connected to anything?
 
Sponsored Links
Joined
17 Sep 2004
Messages
45
Reaction score
1
Country
United Kingdom
The wiring centre is a HeatMiser UH4

1574153280739-1370306890.jpg

As far as I see, there is one manifold.
The 4 actuators on the right have no feed to them, but still seem to be warming the floor.
 
Joined
28 Oct 2005
Messages
13,793
Reaction score
3,369
Location
Daventry
Country
United Kingdom
That's because they've still got the red mounting clips in place, holding them open. Pull them off the tops and control will be restored
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Top