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danfoss

Danfoss is a Danish multinational company, based in Denmark, with more than 37,000 employees globally. Danfoss was founded in 1933 by engineer Mads Clausen.

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  1. T

    Replacing Danfoss lockshield valve

    Replacing a rusty radiator (installed 2000) the brass head of the Danfoss lockshield sheared off as it reached fully closed. I assumed that it was a 10mm with a 1/2" BSP connection to radiator. Offering up the nut (18.6mm across the flats) on the old 10mm insulated microbore it was found to have...
    • Tom Gebbie
    • Thread
    • america danfoss lockshield replacing usa valve
    • Replies: 1
    • Forum: USA
  2. R

    Swapping a Danfoss valve for a Honeywell

    Kingo. Did you resolve your 3 port valveswop re wiring.
  3. kris

    Danfoss Randall Set2 wiring

    Hi there, I've a Danfoss Randal set2 to replace next week, I'm simply looking to obtain the installation manual for the old timeclock, I haven't attended the job yet I've only had a picture sent from the Tennant so I've not checked the wiring, so today I scoured the Internet to try and...
  4. M

    Where to get Danfoss Nozzles

    Where can you buy a box of 40 Danfoss nozzles and where can you get the best value for money, is there a need to be aware of counterfeit nozzles?
  5. S

    Oil from Danfoss trv?

    I just found a small amount of a dark brown/black oily substance under a Danfoss trv that I had turned off the day before. Could this have come from the trv itself or more likely to be a slight leak from the radiator.? The system is quite old but I just moved into the house recently so no...
  6. S

    Danfoss RAS-C2 gland replacement - quick question

    Hi guys. Very specific question... Got a RAS-C2 where the pin will only move a fraction of a mil and no amount of the usual tapping/WD40 will help. So looking to change the gland rather than the whole TRV. Has anyone here changed a RAS-C2 gland before? There doesn't seem to be anything to grip...
    • simonhill
    • Thread
    • america danfoss gland question quick ras-c2 replacement usa
    • Replies: 6
    • Forum: USA
  7. T

    Danfoss TP5000 not "communicating" with Heatrae Sadia Electromax

    Danfoss TP5000 not "communicating" with Heatrae Sadia Electromax. Hi everyone, first post here, so I hope this is in the correct forum. I recently moved into a house with a Heatrae Sadia Electromax boiler, controlled by a Danfoss TP5000 thermostat. Everything seemed to be fine for the first...
    • TimBridle
    • Thread
    • america danfoss heatrae sadia usa
    • Replies: 7
    • Forum: USA
  8. C

    Danfoss TP5000 Change programmer/thermostat?

    Hi, We currently have a two zone central heating system with a Danfoss TP5000(s?) for each zone. Unfortunately the upstairs programmer/thermostat is in the master bedroom which stays warm but the other bedrooms are much colder ~3-4c which means our kids rooms can drop below 16c at night. Is...
  9. S

    How to reprogram Danfoss thermostat as its gone off

    I'm trying to reprogram my partners Danfoss thermostat. I've set date and time and moved on to try set it up to come on and off as its continually on all the time currently. I pressed reset as per instructions as per online instructions and then pressed prog and up arrow but its now gone off...
  10. C

    Danfoss HIU top up pressure

    Hi, I need to install TRV on 3 rads in my flat. I'm looking at my Danfoss HIU (picture attached). I cannot workout how can I top up the pressure if I were to drain the system to install the TRV. I might need a filing loop for this. Anyone familiar with this HIU? Another question, would it be...
    • cyteh84
    • Thread
    • america danfoss hiu pressure top usa
    • Replies: 3
    • Forum: USA
  11. D

    I need to replace my old Danfoss head valve help appreciated

    Hi guys, my head valves of my radiators have broken teeth and need replacing. The diameter size is about 25/26 mm. The old ones are Danfoss BS6284 which are discontinued. I am aware that I could change the whole TVR cheaper but I just want to buy the heads please. Any help would be appreciated...
    • DrNo2021
    • Thread
    • america appreciated danfoss head help old replace usa valve
    • Replies: 1
    • Forum: USA
  12. B

    scalding hot new Danfoss c-2 TRV cold lockshield and new radiator only hot at top .

    I have recently replaced all fourteen Stelrad radiators eight singles four doubles and two chrome towel radiators on small bore 10 mm piping in my four bedroom detached house.The Grundfoss pump is ten years old and sounds good .no bearing rumble.The Ideal classic ff 350 boiler is twenty years...
    • big john hog
    • Thread
    • america cold danfoss hot lockshield new new radiator radiator top trv usa
    • Replies: 32
    • Forum: USA
  13. C

    Which Danfoss model is this heating control?

    Hi, could somebody identify which model this heating control is? (its the wireless, battery version): -I thought "40704" might be the model number, but I've seen the exact same sticker on other versions...? Anyway, thanks in advance/having a look.
  14. T

    Danfoss programmer model?

    Hi Can anyone put a model number to top programmer in the image attached please?
    • TomPen
    • Thread
    • america danfoss model programmer usa
    • Replies: 1
    • Forum: USA
  15. R

    Danfoss RAS-C2 10mm swapping out

    I’m planning to drain down my system to replace the 3 way valve which has been buzzing away for months and occasionally sticking. While I’ve got the radiators drained I was hoping to also swap out a TRV which has been unreliable since it was first fitted a few years ago. All the other TRVs are...
    • Rinnes
    • Thread
    • 10mm america danfoss ras-c2 usa
    • Replies: 11
    • Forum: USA
  16. B

    Danfoss Randall HS3 22mm Motorised Three Port Mid-Position Valve

    recurring Issue, any help would be greatly appreciated. I have changed this valve twice in the last 3 years........ is this normal or would i expect to get longer use out of this valve?
    • Buck Taylor
    • Thread
    • 22mm america danfoss motorised three usa valve
    • Replies: 2
    • Forum: USA
  17. K

    Danfoss Convertor for Hive

    All of the radiators in my house have an old style Danfoss valve that you attach with a clip that screws on. I need to get a converter so that I can switch to a Hive smart thermostat. All the converters that you can get for this don’t work. Can anyone point me in the right direction. I have...
    • Kingbeazer
    • Thread
    • america danfoss hive radiator valves usa
    • Replies: 0
    • Forum: USA
  18. J

    danfoss BFP pump solenoid stem

    problemsolving a electro sterling burner and have narrowed thing down to the stem in the pump that the solenoid should activate- it appears to be seized solid - a magnet can't move it - the solenoid can't- and neither can I physically move the plunger with a lot of force. Time to replace it - or...
  19. A

    Danfoss zone valve wiring

    hi All, i am blocked on an issue: connecting Danfoss AMZ 112 (230VAC) ball zone valve to Heatmiser UH4 wiring center,seems wiring center turns ON the valve (open) when room stat calls for heat, which is fine, but when room stat stops calling for heat, wiring center does not close the valve...
    • Artin
    • Thread
    • america danfoss forum plumbing usa valve wiring zone zone valve
    • Replies: 15
    • Forum: Plumbing Zone
  20. C

    Danfoss RAS-C2 removal

    Hi I have a valve (see picture) that won't come off when I've unscrewed the ring - is there some sort of screw that needs u nscrewing please? 1578915606
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