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cycling

Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, exercise or sport. People engaged in cycling are referred to as "cyclists", "bicyclists", or "bikers". Apart from two-wheeled bicycles, "cycling" also includes the riding of unicycles, tricycles, quadricycles, recumbent and similar human-powered vehicles (HPVs).
Bicycles were introduced in the 19th century and now number approximately one billion worldwide. They are the principal means of transportation in many parts of the world, especially in densely populated European cities.Cycling is widely regarded as an effective and efficient mode of transportation optimal for short to moderate distances.
Bicycles provide numerous possible benefits in comparison with motor vehicles, including the sustained physical exercise involved in cycling, easier parking, increased maneuverability, and access to roads, bike paths and rural trails. Cycling also offers a reduced consumption of fossil fuels, less air or noise pollution, reduced greenhouse gas emissions, and greatly reduced traffic congestion. These have a lower financial cost for users as well as for society at large (negligible damage to roads, less road area required). By fitting bicycle racks on the front of buses, transit agencies can significantly increase the areas they can serve.In addition, cycling provides a variety of health benefits. The World Health Organization (WHO) states that cycling can reduce the risk of cancers, heart disease, and diabetes that are prevalent in sedentary lifestyles. Cycling on stationary bikes have also been used as part of rehabilitation for lower limb injuries, particularly after hip surgery. Individuals who cycle regularly have also reported mental health improvements, including less perceived stress and better vitality.Among the disadvantages of cycling are the requirement of bicycles (excepting tricycles or quadricycles) to be balanced by the rider in order to remain upright, the reduced protection in crashes in comparison to motor vehicles, often longer travel time (except in densely populated areas), vulnerability to weather conditions, difficulty in transporting passengers, and the fact that a basic level of fitness is required for cycling moderate to long distances.

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  1. B

    Boiler cycling Worcester Si24

    The fault: The boiler cycles on and off about every 3-5 minutes; Pump running continously with both hot water & heating in OFF cycle. System: Open vented; Worcester Bosch 24Si; Sunvic 2000 Pro programmer; Drayton cylinder stat; Grasslyn Thermio touch room stat; TLC TL MP3 mid position 3 port...
  2. I

    Voker Mynute 12 e fan cycling

    How can I get some assistance with this boiler chaps? I've read about the not handing out of gas advice on the public part of the forum and have pm'd gas man but not yet got an answer? Oh and how do you get the GS Registered tab below your avatar? Many thanks in advance :biker:
  3. S

    Water not getting hot - boiler cycling

    I've had this problem for over a year and am struggling to solve it. I've had 2 plumbers look at it and also had the boiler serviced and yet the problem persists. When there is a demand for CH and HW my boiler operates as it should, fires up and gets up to the set operating temperature and...
  4. G

    Query on cycling, descaling or new pump?

    My 2 year old Worcester Greenstar24 Ri has the following symptoms. - central heating off and no demand for hot water. - regular cycling at about 10 minute intervals - loud gurgling noises during the cycle - infrequent clanking pipe noises like a door slamming. The sequence from start is...
  5. A

    Potterton Performa 24 Cycling

    Weird one this, above boiler, comes on and stays on. Once it starts to get warm, it goes off, then a couple of seconds later, fires up again. Then after about 15 seconds, it goes off and starts again. No flame failure light. Boiler gets up to temperature. I've checked the NTC, which is only a...
  6. H

    Betacom 24 cycling in central heating mode

    Hi all, I am working on a Glowworm Betacom 24. The problem it has is when the radiators are hot the boiler will shut down and relight continuesly, on off on off. Hot water is firing fine and stays alight untill the focet is closed. Central heating therminster is working fine, heat exchange is...
  7. RoryD

    Modena 102 cycling

    Took alook at a Ferroli Modena 102 which kept cycling. Both sensors were around 15k (ohms) after some use so expected them to be lower. I also discovered that on both heat and DHW there was no modulation. Got the sensors and replaced but [no] surprise same issue. I can't decide on whether it's...
  8. F

    oil boiler cycling

    Hi All,great forum ,hope you can help? I have an old camray compact 50/70 oil boiler, with a rdl g2-sx burner. It has been serviced every 2 years by the same guy. The time for the service seemed to be short so I did some investigating myself. I removed the burner and hacked off 1/4 inch of...
  9. M

    Baxi Solo 3PFL 80 rapid cycling

    I have an annoying fault which has crept in recently. My boiler started to trip out on overheat, despite the boiler thermostat being set at 50% full scale. BG have visited 5 times and have 1. Replaced motor on the pump as it had overheated. See second visit.... 2. Opened the pump spill back...
  10. A

    Oil burner short cycling

    Hi is it possible that water in my oil tank is causing the system to short cycle? Plumber says that's the only thing it could be after troubleshooting. Thanks
  11. D

    Boiler cycling

    I've ended up with this job and a little bit stuck at the moment. I'm hoping one of you guys can help. It's a suprima 40, the heating now works fine after new rad valves and a balance of the system. The hot water is where I'm stuck, the boiler cycles on and off for well over an hour until the...
  12. B

    Ecomac 824e cycling

    Went to Ecomax 824e today which was peeing water out the blow off. The filling loop had been cracked open by customer to compensate for pressure loss so I switched the filling loop off. The boiler had been out of use and electrically isolated at the fused spur by the customer. I checked the pv...
  13. G

    Worcester 14/19 cbi - short cycling

    I wonder if anyone can offer a third opinion on this problem. I have a Worcester 14/19 cbi boiler set-up and all was fine until recently I had solar water heating fitted (new larger cylinder plus extra coil - otherwise more or less as it was). Ever since then the boiler keeps short cycling...
  14. K

    Buderus UFH cycling question

    I'm not a heating engineer, but I have the feeling that my boiler could be oversized for the amount it is being used and therefore cycling too much as a result -- I would appreciate anyone jumping in to confirm or deny my assumption, plus ideas on how to possibly improve the situation: The...
  15. R

    Vaillant 624 System Anti-Cycling / Power question

    Hi all, Please be gentle, my first post. OK. I had a vaillant 624 System boiler fitted by a Gafe Safe engineer, who wanted me to fit a Worcestor Bosch combi, because he has NO knowledge of the Vaillant. I did lots of research and the current 5 year warranty made my decission for me. However...
  16. M

    potterton prima 100 short cycling when off

    Hi i have a long running problem with a potterton prima f 100e , after the boiler has been used and programmer is not calling for any heat or hot water it should be OFF but it continues to short cycle (burner fires for 10/20 secs then turns off) every 20 mins for ever ,unless i disconect...
  17. J

    ravenheat :) dry cycling

    hi all got a raven heat csi120 low nox in my own house (dont start) been in a few years and has worked as well as can be expected. however recently the boiler seem to dry cycle it come on full pelt then clicks off after a minute or so repeatedly it started in CH and is now doing it in DHW as...
  18. K

    Cycling problem

    I have a Ravenheat boiler model CSI 85 A, the water works fine with continuous flame but when the heating is on the the boiler ignites then cuts out cycling about every 20 seconds or less, the radiators all get hot and there's no air in the system, can anyone advise or guide me to what to...
  19. S

    Baxi boiler cycling continuously

    Hi I have a Baxi condendsing boiler (5 years old) - recently I had to get the sundial Y-valve next to the hot water tank replaced as it had failed (and fused in the timing control panel). At some point, my plumber must have changed the settings on the Baxi boiler, as now it cycles and heats HW...
  20. E

    Cycling Pumps

    Hi all, Excellant forum you guys have got here, this is my first post and hope that somebody will have some good advice for me. Just replaced two Stuart Turner CFL single ended pumps for a client due to one of them failing and the replacement model not compatable with the CFL's. The...
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