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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. H

    Danfoss RAS-C2 removal

    Hi have just bought the hive TRV's and I'm trying to fit them I have the Danfoss RAS-C2 currently I have managed to unscrew the gray bit and the hole head turns but I cant get it to come off am I missing a step? I didn't install them they came with the house.
    • hhstu
    • Thread
    • america danfoss ras-c2 removal trv trv's usa
    • Replies: 3
    • Forum: USA
  2. Sittingonabar

    Danfoss Series 7 filling

    Hi all! I'm a new homeowner in a new build that's been fitted with a Danfoss series 7 HIU. We've had no problem with the hot water since moving in in the early summer and I thought it was time to check the heating before it got too cold! Low and behold....the radiators won't heat up...
  3. Z

    Danfoss setting...wall thermostat position.

    Hello, When a Danfoss RAS C2 10 mm TRV is open to its maximum setting is this the same or almost the same as having a rad with no TRV ?. And if it is open to this maximum and left open can a wall thermostat be placed in the same room and work effectively ?. I'm in a property with a newly fitted...
  4. S

    Three way valve letting by. (it's a Danfoss).

    It's happened before a few years ago and I changed the complete thing - valve body and actuator. Straight swap, Danfoss for Danfoss. But, now, after the heating has been off all summer, a couple of the adjacent rads get slightly warm when the hot water is on, so presumably the rubber seal in...
  5. D

    Danfoss fp975 heating trouble

    Hello, We've moved into a house which uses the above system which has duel control for heating and hot water. The hot water worked when we arrived and the heating was off. Now that's it's getting cold I got around to setting the heating up. The time on the unit was wing so I followed the...
  6. K

    Danfoss. - adaptor?

    Hi all Just has new radiators installed and a couple of the TRV valves are Danfoss RAS-C. Looking to get new Thermostatic heads, but not Danfoss ones. Is there an adaptor so I can fit just a regular TRV head? Thanks.
  7. J

    Removal of radiator with danfoss cap at end

    Hi Want to take radiator off wall but don't have the normal value you turn off at other end of thermostat, just says Danfoss. So how do i remove radiator for decorating? Thanks
  8. T

    Danfoss HS3 3 Port Valve Question

    Hi guys, Two questions I am hoping you can help me with. 1) My Danfoss HS3 motorised actuator has a rest position of B hot water as I found out is normal. Once I put the central heating on the valve winds fully to A again as expected but once the CH has been turned off the valve remains at A...
  9. R

    DanFoss FP975 - No 7 Day Programme

    Hi, Recently moved into a new house which has a Danfoss FP975 controller for Central Heating and Hotwater timings According to the manual, it can be setup as either 5/2 (weekday/weekend) programmes or 7 individual days. The controls seem to confirm this with Day / Copy function etc The...
  10. S

    Danfoss TP5000SI interference problem.

    Hi, I live in a new build 2 bed house and it has a hard wired danfoss TP5000si room thermostat and when it clicks on it knocks my tv out for a second. Is there anything I can do about this? Thanks for any help.
  11. L

    Danfoss HSA3 Motorised Valve

    Could anyone please offer any advice on the wiring positions for the new valve, the old valve has numerous wires so I'm now unsure of the positioning for the new, please see attached pictures, all advice appreciated
  12. J

    New Build house - danfoss heating system

    Hi everyone, Im a frustrated new build home buyer who wish I never gave in to my missis and bought an older property! Im hoping someone can offer me some advice. We have a danfoss thermostat system fitted to an ideal combi boiler. Our problem is that when we turn the downstairs heating on...
  13. whatsthenews

    New house.Vaillant eco tec plus Danfoss TP5000si

    Only showing temp setting on right and 2 dots on left (presume they're the dots between where the time would be) Changed batteries twice Pressed reset and a time (11:00) very briefly displays when you first release, but then disappears. Followed instructions to set the date-nothing Is it...
  14. barca

    Danfoss Actuator help

    Hi please could someone tell me if it’s possible I have got a danfoss HPA2 actuator which is not working so I bought a danfoss pack from Screwfix but the actuator is not the same as it’s HSA3 Are but will this still work I know HSA3 is for a 3 port Valve but I’ve only to 2 port valve Many...
  15. S

    Danfoss trvs hard to balance rads

    Hi, I put a new central heating system in my property 3 years ago and used danfoss trvs. I have never managed to successfully balance the radiators using these trvs and wondering now if I've fitted them properly. It's a fine line from hot to warm eg each trv has 5 heat settings but heat setting...
  16. T

    Ital, danfoss, riello oil pumps

    Good morning, I've partially asked this question before but I will ask again, has anyone had any experience of Ital oil pumps, they do both the r40 and rdb so you would only have to stock 1 type of pump for riello. The other thing is this can definitely be done but I've never did it myself, it's...
  17. S

    Reset danfoss fp715si service reminder

    afternoon people, any of you good folk know how to reset the service reminder on this timer. It’s on my mates timer and driving him bonkers Thanks in advance
  18. L

    Danfoss HIU Filling Loop

    Hi, hoping someone out there can help.We have a Danfoss HIU. The pressure is down and have been told to fill the system. I've connected everything as shown in the pics but the gauge isn't budging. [/IMG]
  19. S

    Danfoss zone valve noisy

    Combi boiler with two zones. Two port for upstairs and another for down. Zone valve is making a strange noise when heating is turned on or off at the stat (cogs grinding?) Also the rads downstairs (same noisy valve) often don’t come on. Install is less than two years old. Anyone else had issues...
    • stratplus
    • Thread
    • danfoss forum noisy plumbing valve zone zone valve
    • Replies: 5
    • Forum: Plumbing Zone
  20. R

    Danfos TP9000 issues

    hello, I recently moved into new flat fitted with danfoss tp9000 programmable thermostat for both central heating and domestic hot water. Issue is my heating and hot water both seem to be working all time even though I have programmed on off events in tp9000. The tp9000 indicator light comes on...
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