Danfoss RMT230 Thermostat

Discussion in 'Electricians' Talk' started by Dave1978W, Nov 8, 2018.

  1. Dave1978W

    Dave1978W New Member

    Hi, I ordered a replacement RMT230, but when going to replace the old one, my old thermostat has 3 wires whilst the replacement does not have the terminal for the Neutral wire (Blue) which goes to the accelerator.

    My question is, can I simply not use the neutral? If so, what effect overall will it have on the heating system without having the accelerator? Will this have a negative impact on the performance?

    I have the earth already not in use, but I've read other threads where when 'upgrading' to a digital thermostat and only 2 wires are required, it has been stated that the blue should be taped off and left unused. I was wondering if it is the same in this circumstance?

    The first image is the same as mine wired. The second is what I have received and looking to replace the old one with.

    Thanks in advance.
     

    Attached Files:

  2. Mike83

    Mike83 Screwfix Select

    What model is the new stat. It doesn’t appear to be rmt230
     
  3. Dave1978W

    Dave1978W New Member

    Yes, its the RMT-230, but two wire rather than the 3 wire version with accelerator.
     
  4. Mike83

    Mike83 Screwfix Select

    Ok. Live into 1. Switched live 2
     
    Dave1978W likes this.
  5. Dave1978W

    Dave1978W New Member

    Thanks Mike

    Does not having an accelerator in the thermostat have a huge affect on its performance?
     
  6. Mike83

    Mike83 Screwfix Select

    I’m not sure.
     
  7. Allsorts

    Allsorts Super Member

    Nor me.

    Will it have some negative effect on performance? Almost certainly.

    I think it was just the wrong one to buy, I'm afraid.
     
  8. Mike83

    Mike83 Screwfix Select

    I didn’t even know there was a 2 wire RMT230 on the market
     
  9. Bazza

    Bazza Screwfix Select

  10. Bazza

    Bazza Screwfix Select

    It will work ok, but not as accurately as one with an accelerator.
    You’ll need to put the blue wire in a bit of insulated terminal block.
     
  11. Mike83

    Mike83 Screwfix Select

    If it can be done with 2 wires then why not just supply the normal stat with neutral but give the option not use it.
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice