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photocell

Photodetectors, also called photosensors, are sensors of light or other electromagnetic radiation. There is a wide variety of photodetectors which may be classified by mechanism of detection, such as photoelectric or photochemical effects, or by various performance metrics, such as spectral response. Semiconductor-based photodetectors typically have a p–n junction that converts light photons into current. The absorbed photons make electron–hole pairs in the depletion region. Photodiodes and phototransistors are a few examples of photodetectors. Solar cells convert some of the light energy absorbed into electrical energy.

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  1. G

    boiler locks out , complete service and parts change

    problem with my oil boiler everything has been change all cleaned out set up but still locks out , if I remove photcell and shine a light on it it runs fine replace photocell and it stops again , new cell and control box, heating engineer is beat now as well
  2. J

    HRM Wallstar Photocell

    Hi, We had our annual oil burner service carried out by a well known Norfolk firm last Thursday and all was great for a day. Came home from work on Friday evening to find our 15+ year old HRM Wallstar burner had locked out. I pressed the lockout button only to find it would lockout 1 to 2 mins...
  3. MichaelGo

    Replacement for danfoss 057h202d photcell

    Looking for help identifying a photocell for an old Myson Velaire oil boiler. The current photocell is a danfoss 057h202d type D photocell, which I can’t find listed anywhere. So I would be very grateful if someone might know which current photocells might be compatible. Regards Michael
  4. G

    Riello RDB Burner Photocell Sooting Up

    I have a Riello RDB Burner housed within a Grant Outdoor module 70/90. During the last 2 months the boiler has stopped firing up at about 3 week intervals and I have had to clean the photocell in order to rectify the problem. I had the boiler serviced last summer.
    • GeoffC
    • Thread
    • america burner photocell rdb riello usa
    • Replies: 7
    • Forum: USA
  5. Inverness

    Photocell issue How to test it

    hi guys. When the riello burner is firing when I pull out the photocell and cover it up the flame goes out then comes back on? Can you tell me how I can test the photocell so I know it working? The boiler firebird it's starting to lockout at the burner every so often I have noticed the oil pump...
  6. W

    Riello RDB burner motor running but not firing - tip

    Had this come up again last week, and just wanted to pass on this tip: If you come to a Riello RDB burner which has the motor running but does not attempt to fire, or takes a long time to fire, it can either be the photocell or the motor. Most often it is the photocell. To test, pull the...
  7. A

    Sooting-up of photocell

    We had a new Grant Vortex Pro 26e boiler (external) installed just before Christmas after the water jacket in our old boiler split. Since the n I've twice had to clean the photocell after it became excessively sooted-up. We've had some quite strong winds recently and I've read this can...
  8. T

    boiler not firing up or locking out

    hi can anyone tell me what the fault would be in a boiler ive been looking at.its already had the transformer replaced and is firing again.but now when it kicks back in again on stat it doesn't fire up or lockout just blows cold air,im thinking control box or photocell.its a old boiler with a...
  9. T

    replacing the old danfoss bh012.1 control box

    Will try and post in the proper place now , can anyone tell me what replaces the old danfoss bh012.1 oil control box. I have a danfoss bh072.10, siemens loa24.171b2b and a landis gyr loa24.171b27 in my box ,any help would be appreciated.
  10. F

    Boiler coming on for a minute or so then going out

    Hi guys im a gas safe qualified engineer and have been for the past 15 years. I recently done my OFTEC as I had a few installs coming up and also have some this year. I had a call from a customer with Thermecon OS60/80 which has blown out due to the high winds. The boiler flue is in a high...
  11. T

    warmfkow condensing boiler

    hi was wondering if anyone can help me with a problem im having with a riello rdb burner on a warflow condensing boiler i looked at today.it runs fine for anything from 10 mins to 20 mins then loses pressure from 9bar to zero.it then either relights or cycles on and off a bit but doesnt...
  12. C

    Worcester Bosch HEATSLAVE 20/25 ignition failure

    Hi. I've got a Worcester Bosch Heatslave 20/25 oil fired boiler and the burner has stopped igniting. I have done a fair amount of fault finding and this is what I have found: If there is a demand from either the hot water, or the heating the burner blower starts, but there is no ignition. It...
    • CraigT
    • Thread
    • bosch control failure heatslave ignition photocell solenoid worcester worcester bosch
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  13. K

    Firebird Oylympic photocell replacement

    Got a Firebird Oylympic oil burner which goes straight to lockout when switched on. I suspect the photocell; question is - how exactly is it replaced? regards Kaegran
  14. D

    riello burner problem.. help

    Today i was fixing a riello burner. The fault at hand was the capacitor do i changed it and it went but the flame kept cutting out once it ignited, so i took the photo cell out to clean it but after i done that the fan just got stuck in a loop. So i would turn the burner on and the fan just...
  15. W

    Puzzling trip out on Trianco TRO

    Problem I have with a vintage TRO The burner kept tripping out every few hours. Burns well normally, good readings, no soot. The normal thing of course is to assume it's the solenoid coil which I did. Continued to trip but less frequently, maybe twice per day. Changed the solenoid valve as...
  16. K

    riello RDB2.2 problem

    Hi Guys Some help from the experts would be appreciated before I end up in the divorce courts!!!! I have a Firebird Heatpac 70/90 boiler with a Riello DRB2.2 burner - My problem is that the burner just will not fire well that it not exactly true it is in permanent lock out mode and occasionally...
  17. F

    Firebird Combi boiler problems

    Hello I have a Firebird Combi Enviromx Slimline C26 boiler (don't laugh). Its less than 18 months old & professionally installed and been working fine until very recently. Now the hot water seeems to be very intermittent. Most of the time its fine but occasionaly it never gets above luke...
    • farmer.palmer
    • Thread
    • boiler combi combi boiler firebird intermittent never oil photocell problems sounds
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  18. A

    Grant euroflame 50/70 oil boiler failing to fire

    I have been having trouble with this boiler ever since it was installed due to two rogue plumbers never setting it up correct. However last year,and with a well reccomended plumber the boiler worked fine for 12 months. But now the boiler stopped working a few days before it was due to be...
    • andrewjeffs
    • Thread
    • boiler failing fire grant oil oil boiler photocell plumber start
    • Replies: 38
    • Forum: Plumbing Jobs | The Job-board
  19. W

    Firebird oil boiler non starter

    Hi - i have a Firebird combi 90 oil boiler - working fine until last week when the flow switch split - turned off the mains supply to it and isolated the water - fitted a new switch 5 days later -turned water and power back on & tried to restart it - the blower/fan is running but the burner does...
  20. O

    Riello burner not firing (camray 5 oil fired boiler)

    I have removed photocell connection to control box. I get a click but no woomph! (does not fire) then locks out. Any ideas?
    • oink
    • Thread
    • boiler burner control fired firing lockout not firing oil photocell removed riello
    • Replies: 19
    • Forum: Plumbing Jobs | The Job-board
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