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stat

  1. M

    radiator with room stat in as bypass

    Hi is it sufficient to leave the radiator in the room were the room stat is going as the system bypass by leaving it with two lock shield valves on it?
  2. P

    Timer on Potterton Combi Broken - Want To Fit RF Programmable Room Stat.

    I have a Potterton Performa 24 Eco HE combi, and the integral analogue timer clock is jammed. I want to fit a new Honeywell CMT927 RF programmable room stat. This will replace the broken timer and also act as a room stat as there isn't one at present. I'm ok with wiring the receiver into the...
  3. B

    Stuck 2 port valve versus boiler high limit stat....

    At a job replacing a cylinder and he mentions the boiler kept running even though the programmer wasnt calling. Apparently some history of the CH 2PV sticking on. I found it under some floorboards....nice. So even with the actuator closed, the switch is ON and therefore running the boiler (there...
  4. B

    Drayton room stat - how to bypass it

    Hi guys, me being not that good with electrics, I want to eliminate a room stat from a problem I have where I have hw but no heheating the stat has 3 wires. A live, a neutral and a call wiwire which wire do I need to join in order to bypass the stat completely and prove its either working or not
  5. C

    faulty room stat???

    customer on the phone now , saying everytime she turns one stat up in the house on a ufh system the lighting trips , would i be right thinking that this stat is faulty and needs replacing or would it be the actuator on the manifold? thanks
  6. Scott_D

    Best RF room stat for combis

    What are the best RF room stats to fit for combis when considering price, ease of installation and ease of explaning to the user. Do you go for manufactureres own plug in units or Drayton, Honeywell or other?
  7. P

    Question Re. Connecting New Room Stat To Mains?

    My combi doesn't have a room stat, so I am going to install a wireless one. When I install the stat's receiver next to boiler, what is good practice/OK when connecting receiver to 240V mains? - A) Connect to the electrical block inside boiler's electrics where boiler's 240V mains supply is...
  8. M

    Ferroli Falcon NTC stat resistance please?

    I went to look at one of these lovely devices toda - CH fires for about 5 seconds, repeatedly, with no demand. I'm pretty certain it's the frost protection kicking in, but to be sure I'd like to confirm what the expected resistance should be on the NTC stats. Anybody know offhand please? Also...
  9. Riley

    Wireless stat problem

    Any thoughts guys. Called out to a Siemens wireless stat this morning where signal is not reaching boiler. Boiler is a Biasi SpA if that has any bearing. Checked all wiring and that receiver and stat have power - both ok. Is this likely to be a boiler problem or a stat problem as I think...
  10. gassafe

    Thermocouple with interpreter stat :(

    Gas fire The fault was a pilot not staying lit so I ordered a pilot assembly kit. Fitted it okay, but when releasing the button pilot cuts off immediately :( i disconnected overheat interrupter on thermostat & bridged with piece of wire, pilot stays lit & main burner works! I put multimeter...
  11. W

    room stat calling for heat,boiler going off at 18 degrees,any ideas

    Hi all Got to go to a job tomorrow,just trying to get a head start PROBLEM:Lady says she comes in switch room stat,which is digital,to 21Dgre boiler goes out at 18Dgres, then fires up,and goes off,does,nt go off completley but room stat not going above 18Degres,its a...
  12. B

    Stat question.....

    Go easy on me as this is my first post :) anyway, I am in the process of getting my heating changed over from a combi boiler to 'old type' system with maxipod in attic, I have a good few questions tbh but I'll start with what might be a simple few questions. The boiler has a stat fitted and I...
  13. G

    Black cable on stat

    Hi all was fitting a new boiler today but when I was taking the old boiler out there was this black cable which went straight out the boiler to the the room stat. The room stat already had a live, neutral and earth from the boiler but don't know what that other black cable was for. Is it a...
  14. B

    Wiring a volt free stat to my new Heatline boiler?

    We have fitted, a Heatline Monza 24KW condensing combi boiler. It has 24v and 240v connectors, although I'm lead to believe the 24v is just for the boilers built in controls. The programmable thermostat is a Homexpert(Honeywell) THR870CUK, 7 day program, two wire, 'VOLT FREE' jobbie, that...
  15. E

    Eco honeywell room stat ,,

    What's the lock / key sign mean , customer rang me and asked . I'm nit sure ,
  16. B

    room stat

    i have a baxi duo tec with a rf stat i was forever having problems,so i got a mechanical room stat ,2 wire install, simple i thought,i removed the reciever from the pcb and took the reciever off the boiler,i took the loop out room stat connection and followed the mi regarding wiring...
  17. D

    Problem with room stat...

    Hello all. Hopefully someone will be able to help. I'v got a room stat which when you turn the dial up manually it clicks and the boiler fires up as it should. Then when the room reaches temperature it turns off as it should. But then as the room cools again the boiler does not fire up...
  18. C

    Need a new type of wall stat

    I have a drayton dial type wall stat (240VAC) in the livingroom set at 70 deg F to control my gas combi boiler for the whole house. The stat has a fixed 'cut back in' at 2 deg F below the dial setting to give a near constant temperature. This makes the boiler cycle around 3 to 4 times an hour...
  19. M

    Open vent room stat to domicondens 26c combi

    Hello everyone, I am converting open vent system to condensing boiler. My question is can I use the old room stat with the new combi or do I need a new stat specific to combis? It has 4 cables (brown, blue, yellow and green). In the instruction there is a warning saying, "IMPORTANT: THE ROOM...
  20. B

    Grant Vortex 15/21 non condensing - overheat stat?

    I went to this external Grant yesterday as it wasn't firing up. It wasn't locked out but controls seemed to be functioning - prog moved the control valve and got power to the boiler but no firing. The overheat stat nipple was extended as shown below and wouldnt reset (that is out isnt it?). The...

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