UH3 heatmiser system

[egginyourface]

Evening all. Has any one ever fitted one of these. Gave it a go the other day and use couldn't get the damn thing to work.

The set up is this:

1x Honeywell programmer
1x function box
1 x 2 port valve for ch + thermostat
1 x 2port valve for ufh + thermostat
2 x actuator
1 x UH3 heat miser junction box

I understand how to wire ch to boiler but bit confused how he ufh is incorporated into the system

it all looks so confusing.

 

[jaydee81]

what issues were you having with it

 

[egginyourface]

First of all does the motorised valve connect directly into the ufh junction box?
How does th programmer connect with it ?

 

[jaydee81]

yeah motorised valve connects into wiring centre if you are using a programmable thermostat no real need for a programmer

 

[egginyourface]

So does ch heating 2 port valve connect as normal on splan junction box and the uf heating system along with 2 port valve connect to uf3 heat miser junction box.

I did this but couldn't get power to my 2 port valve.

I was doing something wrong

 

[jaydee81]

yeah is two separate systems just been looking at wiring diagram valve wiring is not quite right grey from valve connects to live terminal and then brown to terminal marked gr

 

[egginyourface]

Where did you find diagram?

 

[jaydee81]

John Guest Speedfit - The World Leader in Push-fit Fittings, Pipe and Plastic Plumbing Systems - Home underfloor

 

[egginyourface]

Thanks. The diagram mentions zone8 for ch but nothing about wiring ufh 2 port valve. Only a link for the ufh valve terminals

 

[jaydee81]

yeah says zone valve is optional just remove link and wire zone valve in its place

 

[egginyourface]

So from the boiler in and out terminals do I only connect the out terminal as this turns boiler on

 

[jaydee81]

boiler in and out is volt free contact so needs a feed in. either wire boiler in to permanent live in boiler or if you cant link it to permanent live in the wiring centre

 

[sedgy34]

we are fitting these ufh 3 on a site you need a link from permL to boiler enable and boiler swl in the other terminal (easy peasy) also you will probably have a manifold statt this requires a feed and connect the pump in so high temps it cuts the pump off. hope this helps

 

[K Macnamara]

How did you get on? I fit these quite often so if you still haven't had any success let me know and I'll point you in the right direction

 

[egginyourface]

I paid a friend to go and connect it up in the end. He works with heating systems daily so was a piece of cake. I couldn't make it to see how it was connected in the end.

But thank u all for advise