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Jehan Vaillant (fl. 1360–1390; also spelled Johannes Vayllant) was a French music composer and theorist. He is named immediately after Guillaume de Machaut by the Règles de la seconde rhétorique, which describes him as a "master … who had a school of music in Paris". Besides five (possibly six) pieces of music surviving to his name, he was also the author of a treatise on tuning. With Grimace and F. Andrieu, Vaillant was part of the post-Machaut generation whose music shows few distinctly ars subtilior features, leading scholars to recognize Vaillant's work as closer to the ars nova style of Machaut.

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  1. T

    Vaillant EcoTech Boiler Heating Partial Load auto feature

    It appears that the auto feature (D0) is no longer working on my boiler. My rads are taking 45 mins to get warm and the flame is now a lot lower than it used to be. I have tried gradually increasing the kw on partial load. I started using 14kw (have 9 rads) no change, and it only kicked in when...
  2. J

    F.22 Vaillant EcoTec Plus 630 - can't locate filling loop

    Hello - I have an f.22 error on this system boiler, 0.4 bars. Just moved into this house so not certain on how everything works. There are no taps under the boiler to add more water. There is a hot water cylinder in the cellar so thankfully it's just heating that we have lost. With this...
  3. L

    Opinions on this : Vaillant Boiler Fitted with "Vaillant protection filter " on the flow

    All feedback welcome ! Here are a few details . 1.New Ecotec Vaillant boiler fitted ."protection kit/filter " paid for to get 10 year Guarantee etc . 2.Vaillant filter fitted on flow for No reason . This was coming up to 2 years ago. 3.Install company then serviced it and failed to notice...
  4. TallulaB

    Vaillant auro stor water heater issues

    Hello, Hoping someone can help! Not sure what else to try. We have a Vaillant eco tec boiler and we also have a Vaillant auro stor water heater, but for the last two months all of our hot water is coming out Lukewarm. When we first moved in it worked perfectly and the water was super hot. Our...
  5. Mark97

    Vaillant ecotec 615 help

    Hi. Boiler is a vaillant ecotec 615 unvented system boiler. I have changed the diverter valve plastic body (obviously no diverter valve in it). I had a tiny drip between this and the pump housing, so I have replaced this and replaced all seals around this and the pump. Upon running the boiler...
  6. T

    Vaillant System Boiler and Megaflow Installation

    Hello, I have open vent old Ideal boiler (in the kitchen)with open vent hot water cylinder.(on first floor cabinet) We would like to change the boiler to Vaillant Ecotec Plus 624 system boiler and 210i unvented indirect Megaflow cyclinder. How much it will cost the labour? How long it will take...
  7. S

    Vaillant EcoTec Plus 938 temperamental in heating mode

    Hello, we have a Vaillant EcoTec Plus 938 boiler and it started behaving when running in heating mode (hot water is fine - no problems with that). The problem is that quite often when there is demand for heat (either from one of Hive TRVs or from under floor heating thermostat) boiler starts...
    • skvortsov
    • Thread
    • america central heating system ecotec ecotec plus heating plus usa vaillant
    • Replies: 47
    • Forum: USA
  8. G

    Unable to adjust co2 readings vaillant boiler

    Unable to adjust co2 readings on a a vaillant ecotec boiler it’s an lpg model I’m currently getting 0.0004 ratio, can’t get a higher co2 percentage than 8.6% (minimum being 9.7 without cover) and the ppm is around 40 Have tried new gas valve new Venturi and new pcb. I’ve cleaned burner and...
  9. L

    Vaillant ecotec 831 F61 fault

    Just wondered if anybody could help me with this one....... or advise... Called out to an ecotec 831. fault code F61. The gas valve had been changed by a third party a week before... I checked the ignition electrodes and they were caked in sh*t. Cleaned and fired back up. Advised...
  10. P

    Replacing entire filling loop on Vaillant EcoTec Pro 28

    Hi all, I think has been discussed before but I don't think I've seen a clear answer. We have the Vaillant boiler as above and the filling loop has started to leak from around the olive joint on the cold water side. I would like to replace the whole loop, flexi, taps and the valves etc. I can...
  11. G

    Hot water to all of my house except master bathroom

    I have a Vaillant ecotec plus 838 boiler and yesterday morning I used the shower in my master bathroom and it was working fine with plenty of hot water, however that evening I went to have a shower and there was no hot water, so I tried the bath and tap in that master bathroom and there was no...
    • Geohowden
    • Thread
    • america bathroom hot hot water house master no hot water usa vaillant water
    • Replies: 20
    • Forum: USA
  12. S

    Y plan with Vaillant Ecotec plus OV430

    Can Someone tell me how to wire the Vaillant ecotec OV430 with the Y Plan system. Does the orange from terminal 8 junction box go to the RT terminal on the boiler (room thermostat)
    • Stevie B
    • Thread
    • america ecotec ecotec plus plus usa vaillant y plan
    • Replies: 2
    • Forum: USA
  13. D

    Vaillant ecoTEC plus 637 with Nest or maybe SensoHome

    Hi, A newbie here but need expert advice, I have installers who have started fitting the boiler (Vaillant ecoTEC plus 637) replacing an old water tank loft system and cylinder in the cupboard I'm also installing a horizontal megaflo (tempest) Okay, so they purchased the Valliant vsmart kit...
    • dwaindigital
    • Thread
    • america ecotec ecotec plus maybe nest plus sensohome thermostat usa vaillant
    • Replies: 21
    • Forum: USA
  14. J

    Which Inhibitor for Vaillant Ecotec ?

    Had system drained and replaced 3 rads. Just wanted to know is any inhibitor ok or does vaillant have a recommended brand?
    • Justice League
    • Thread
    • america ecotec inhibitor usa vaillant which
    • Replies: 7
    • Forum: USA
  15. No More Heroes

    Vaillant Ecotec Pressure Too High

    I have a Vaillant Ecotec plus 637 boiler. The pressure is very high and pegged to the right - water is dripping out of the outside overflow through the Pressure Release Valve. An engineer has replaced the expansion vessel and checked the filling loop. The pressure gauge is still pegged. (Note...
  16. P

    Vaillant Boiler Size

    Hi, We have an ecotech plus 837 in our house that was originally over rated on installation. It was installed based on the hot water flow rate and told that the heating would modulate itself down accordingly. This is the case in very cold weather but not when its a bit warmer. It is now...
    • prs999
    • Thread
    • america boiler size usa vaillant
    • Replies: 10
    • Forum: USA
  17. Z

    Vaillant Ecotec Diverter Valve Repair Cartridge

    I've seen some replacement cartridges for Vaillant Ecotec diverter valves, just the innards. Aftermarket stuff, not official, and I know you're supposed to use official parts and all that, but the diveter valves on Vaillants are probably the weakest part i'd say. Has anyone used them and had...
  18. T

    Vaillant F 83

    Hi My Vaillant boiler constantly show F83 and has done since installed 2.5 years ago. The installer seems unable to sort it. A vaillant engineer said the water is taking too long to transit because the radio control is too slow. Control now hard wired but problem remains. Any suggestions?
  19. D

    Vaillant Boiler ecoTEC+418 - Status Code S46

    Live monitor is giving me status code S46 (Comfort Protection minimum load loss of flame). Symptoms are boiler taking longer to come on and takes longer to heat rads, although it gets there in the end. Flame is lower on symbol and boiler quieter than it was. Anyone got an idea of why the...
  20. E

    Excessive hot water time in vaillant 938 boiler

    Hi everyone. We have just moved into a new house with a vaillant ecotec 938 combi boiler. The boiler is in utility room downstairs next to kitchen. Hot water comes out of the downstairs tap in approx 2 seconds. However upstairs in the ensuite, it takes 80 seconds before the water becomes hot...
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