How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Plumberpro Your Own Question
Plumberpro, Home Appliance Technician
Category: Appliance
Satisfied Customers: 634
Experience:  Heating and hot water heating appliances experienced
Type Your Appliance Question Here...
Plumberpro is online now

How do you wire in the switching live to the new type system

Customer Question

How do you wire in the switching live to the new type system boilers?
Submitted: 3 years ago.
Category: Appliance
Expert:  Plumberpro replied 3 years ago.



Hi . are you wiring in a room stat?

JACUSTOMER-i9ztb263- : 2x 2 port valves with a switching live from the wiring centre

In the boiler wiring centre there will be a 240v switched lived connection. There will also be low voltage or volt free inputs. Don't use those

JACUSTOMER-i9ztb263- : Ok so where does the switched live go?

Have you got the boiler model or GC and I will check the wiring diagram,

JACUSTOMER-i9ztb263- : VAILLANT 630 system boiler

Ok , give me a minute, thanks

JACUSTOMER-i9ztb263- : ok

Page 27, 230v section .remove the link in 3 and 4 and put switched lie in 4. If 4 didn't work it will be 3.

JACUSTOMER-i9ztb263- : Is that the Bus terminal?

No the bus is for specialised ebus controllers, usually weather compensation units etc

JACUSTOMER-i9ztb263- : Ok so not the low volt rf either?

No . the motorised valves etc work off 240/ 230volts , so the power from the switched live will be the same . if you put it in the low voltage or bus you may damage the boiler pcb

JACUSTOMER-i9ztb263- : Ok so any links that need removing or linking over?

If there is a link in 3 and 4 in the 230volt section you can remove it and put switched live in 4


Hi . if happy with your answer , would you mind rating it , thanks


Hi , could you please rate your answer , thanks