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modulating

In music, modulation is the change from one tonality (tonic, or tonal center) to another. This may or may not be accompanied by a change in key signature. Modulations articulate or create the structure or form of many pieces, as well as add interest. Treatment of a chord as the tonic for less than a phrase is considered tonicization.

Modulation is the essential part of the art. Without it there is little music, for a piece derives its true beauty not from the large number of fixed modes which it embraces but rather from the subtle fabric of its modulation.

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  1. J

    Sapphire Modulating Oil Fired Boiler

    Has any installer/user any feedback on these?.
  2. B

    Boiler not modulating?

    Hi, Not sure if this is the place to post this, but hope some one can help. My Central Heating water temperatures seem to fluctuate a lot, while I’m using a modulated system. Within an hour is goes from 50 degrees to 20 degrees many times, while the outside temp as wel as the room temp remain...
  3. R

    Glow worm Ultracom 30sxi not modulating low enough for "smart" TRVs?

    Hi everyone, I'm looking for some advice please. My system has 5 Drayton Wiser TRVs. There are 8 rads over 3 storeys and a 170l unvented cylinder. One of the attic rads is in the same zone as the cylinder so just has a "dumb" TRV on it. The two bathroom rads also remain without TRVs and I...
  4. B

    British Gas 330 boiler modulating protocol

    Hi all, Just moved into a house with a British Gas 330 boiler and would like to fit a modulating smart thermostat. Does anyone know what modulation protocol it uses? I've googled, checked the manufacturer's website ( Glowworm ) but with no luck. Boiler ID GC 41-047-75 Thanks!
  5. B

    Modulation - Should I Expect Efficiency

    Hi. Looking for some advice on thermostats. I've got a Vaillant 835 Ecotec Plus set up but have not yet installed a thermostat. The house is approx 100sqm, a victorian terrace but fairly well insulated under the ground floor and in the loft. It has two zones: 25sqm of liquid underfloor on a...
  6. H

    Boiler cutting off and not modulating

    I have installed a Worcester Greenstar 8000 35kw system boiler Instead of the boiler modulating it gets to 69 degrees and cuts off drops down to 50 degrees then kicks in again this cycle happens every 5 mins like clockwork I thought it may be air but I put got water only on I have an unvented...
  7. P

    Do you need to range-rate a modulating boiler?

    Hi folks, just a regular member of the public here, learning all he can before having a new combi-boiler and radiators installed in my old victorian flat. For years I've just had some fan heaters! But now it's time to upgrade. I'm fairly techie, but I can't see why your would range-rate a...
  8. J

    Vaillant wireless VRT 392f ebus control modulating advantages?

    Some info about interaction of Vaillant wireless controllers with the Vaillant ebus system please. Does connecting the wireless receiver to the ebus effect the boiler modulation and if it does what is the benefit over a simple on/off thermostat? I have had problems over the years with this...
  9. P

    Boiler not modulating

    Hi, I'm looking at a British Gas 330 boiler made by Glow-worm. The boiler constantly cycles between flat out and off, rather than modulating as it should. I though it might me a blockage somewhere in the system which was preventing hot water get away so the boiler was going into over heat shut...
  10. B

    Modulating Condensing Bolier - what style pump is recommended ?

    Hello, My second post :-) Recently I had a Vaillent 418 ecofit pure open vent boiler installed onto an old system ( the installers were rubbish, over promised and under delivered) I am now looking at getting the best efficiency out of the system and the boiler by getting the return temp below...
  11. M

    ferroli modena not modulating

    going to an old Modena with scalding hot water when pot is turned to minimum so suspect its not modulating.....not sure this would be a thermistor problem as the boiler continually fires when tap opened....anyone experienced this and know expected voltages at gas valve??? or how to set up the...
  12. J

    Modulating Boilers

    Firstly, I thank those who corrected me regarding modulating oil boiler. This belief arose from a search, bringing WB Heatsave to the fore, and their literature claiming a heatronic 4i control unit which, "intelligently responds to heat and heat water demands." Interestingly, WB in contesting...
  13. finchy01

    Grundfos pump oscillating

    Morning chaps, I've been sent to look at a job. Sealed system with a big twin head self modulating grundfos pump. The pump is constantly modulating up and down, up and down and the pressure is up and down in time with the modulating. I e not worked on this type of pump before (I've been...
  14. L

    New boiler modulating.

    Hello world! A bit of history on the job first. Existing boiler Gloworm 24HXI 8 yrs old never serviced. Customer has been having problems for 3 years with heating, not getting hot, boiler banging etc. Anyway HXI heat exchanger has had it, (seen a few of these now waterways cant handle much) No...
  15. M

    Glow Worm Compact 75p not modulating

    Ive been to a Glow Worm that on both Heating and DHW will run on low light for 5 mins then go off. Took the Covers off, everything freezing cold. Got into the burner, all clean as a whistle, Fired it up for a sec with the covers off, tiny little flame on the burner just as I thought. First...
  16. N

    28i Junior modulating in minimum mode

    Hi all, Was wondering if anyone had come across this before or might know what the problem is. Trying to adjust the air gas ratio on a 28i junior. Put it in service mode. Turn the dial to maximum. Boiler goes to full output. Adjust the valve to get the reading I need. All good. Then turn down...
  17. W

    Ariston Microgenious 23 MFFI Fully Modulating

    Hi folks, Your assistance would be greatly appreciated. I have a customer that would like to get rid of there electric shower in favour of a thermostatic mixer. They tell me they have the above mentioned boiler. Depending on what the consensus reckons I'd probably recommend a Mira Excel...
  18. W

    "Fully modulating" combi boilers.

    What are these? Are most combi's fully modulating? Looking at possible shower valves for a replacement for a customer who has a combi (can't remember the brand/model) and many seem to be suitable for combi's which are fully modulating. Thanks
  19. P

    modulating valve setting

    helllooo every1, im asking a bit daft question but i hope you can help me out here. i was tring to gas rate a main 25 he boiler but it kept on modulating, how do we set these to service mode so we can gas rate them on full power? dont have MI cheers guys.:rockon2:
  20. S

    Double boilers oil modulating

    Hello, I have ideal which I would like to share and gather your thoughts. My current system comprises of a hot water storage tank and a Camry 25/32 utility boiler (oil). The boiler is fitted with a 0.75 nozzle. The house is kept at a constant 21 degrees right throughout the year...
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