underfloor heating wet system

[foghorn]

Hello and thanks
Have a customer who will be having underfloor heating installed run from combined boiler and different zones can anyone give me some idea as to what's required to wire for such a system not done one of these before so advice much appreciated.

 

[stidge]

You will need to wire to each thermostat(zone) back to your control centre, also I always pull in a couple of 5 core flexes from wiring centre to boiler ( always some spare cores if you need) I would find out what system is being put in and study diagram that comes with or search online. There are many diff set ups ! Hope this helps

 

[RyanCheetham]

These things can be a nightmare to wire up if you don't know what you are doing. Find out whats being supplied and research it as much as you can, find diagrams, best practices and even common faults that occur. You will be much better prepared then

 

[lurch]

4 cores to set back room stats.

 

[BlueToBits]

I don't know the name of the system ( a 12 zone system 15 years ago) but from memory, each MV required 230V supply and 4 core control. 2 core elv to room stats and outside sensor to control centre. I seem to recall wiring each MV individually in cat5 back to the control, linking the stats to their respective MV and utilising a spare pair in the MV's cat5. We looped a 230V supply round all the MVs and terminated in fused switched connection units at each point. They weren't standard MVs because the 230 volt motors were controlled by elv signals.

The control centre could switch on individual zones at different times there was night set-back, optimised start and weather compensation.

 

[craigmac]

if its only a combi boiler and its doing the underfloor heating only (ie no radiators upstairs) run 3 core and earth cable to each of the thermostats live neutral swich wire (demand cable) and earth back to the control centre and run a 5 core cable back to the boiler to give you your live neutral and earth at the control centre plus your demand cables a pump may also have to be wired most control centres have terminals for this so just a 3 core to that from the wiring centre the actuators will have to be wired also so try and mount the control panel near to the manifold