Search the forum,

circuit

A circuit breaker is an electrical safety device designed to protect an electrical circuit from damage caused by an overcurrent or short circuit. Its basic function is to interrupt current flow to protect equipment and to prevent the risk of fire. Unlike a fuse, which operates once and then must be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation.
Circuit breakers are made in varying sizes, from small devices that protect low-current circuits or individual household appliances, to large switchgear designed to protect high voltage circuits feeding an entire city. The generic function of a circuit breaker, or fuse, as an automatic means of removing power from a faulty system, is often abbreviated as OCPD (Over Current Protection Device).

View More On Wikipedia.org
  1. T

    Vaillant eco plus 837 System loosing pressure.

    I have a Vaillant eco plus 837, year installed 2008. It works well. We have one large zone for the house with 13 rads running off it. We also have an UFH zone in the kitchen. Near the boiler I have 2 port valves which control this part of the system. The boiler has been loosing pressure...
  2. W

    Replacement Collector Circuit Pump

    Hi, I’m looking to find a replacement Collector circuit pump for a ground source heat pump. This is the pump on the brine circuit. The pump I have is no longer supported by the manufacture. It’s a Wilo TOP-S25/7.5 Any recommendations would be very welcome.
  3. S

    New Valaint LPG Circuit board.

    I have recently had a new lpg valiant boiler fitted but a few weeks previous I had to have a new circuit board fitted to the old boiler, my question is would anyone be interested in buying the almost new one? It cost £280 but I would be happy to get £100 back I can post it. Cheers Steve.
  4. S

    Main Boiler circuit fuse blowing.

    This morning woke up to no central heating, but the hot water had been on earlier in the morning. I checked the programmer and it was indicating CH was on. Went to the room thermostat and it didnt click when rotated, but then started clicking without any input. I had a spare room thermostat...
  5. C

    Can I add a small electric boiler in parallel with my central heating?

    Hi, I would really appreciate some advice on a proposed change to my central heating circuit. I am able to divert excess electricity from my recent solar PV installation to one (or two) hot water tanks and I would like to plumb in a small hot water tank in parallel with my central heating...
  6. I

    Heating Design Circuit - will it work?

    Hello, I'm looking at installing a new central heating system with UHF on the ground floor and normal rads on the 1st Floor. The design was initially to have at its heart an Ideal System Boiler and a Telford Tempest 500l Indirect Cylinder but I'm considering changing/modifying this design to...
  7. H

    Design of circuit and Boiler type query

    Hello, I am new to the forum and certainly not a plumber so please forgive me if my questions are particularly stupid. 1) I am renovating a house and the heating system has been removed to be replaced from scratch. To reduce costs I am attempting to do the first fix myself. The plan is to send...
  8. J

    Main Circuit Drain Valve?

    I just bought a Biasi 25c Combi boiler and I can't understand what the Main Circuit Drain Valve is for. It has a screw in plastic end so doesn't look like it's designed to attach a pipe to it to drain the CH system and even it did, it's higher off the ground than all the radiators so wouldn't...
  9. A

    Towel Rail on boiler circuit

    Hi everyone, In my house the boiler (standard heat only) is in the garage and the flow and return run in 28mm under the first floor bathroom and into the airing cupboard across the landing where the cylinder, pump and motorised valve are I want to put the bathroom towel rail on the main...
  10. D

    Using HW Circuit for Pump Overrun?

    Hi, I have a Y Plan system with Glowworm HX system boiler vented system. The system as originally fitted has one radiator without TRV (Landing) but also has a gate valved controlled by-pass. The pump is controlled by an output from the boiler. Many years ago I added an Honeywell ABV and this...
  11. R

    The idea of balancing a system is to try and get the pressure drop of all circuits equal to that of the index circuit.

    Hi. Just trying to get my head around how this relates to the temperature drop across the circuit. Not disputing that the two are related (obviously we measure temperature as that is easier) but I don't understand the process. This came up on another thread and I didn't want to sidetrack the...
  12. J

    rain water coming into Ideal Combi boiler through flue and causing main circuit board to blow.

    The main circuit board has gone 3 times in the last 3 months after heavy rain. I have a maintenance contract with British Gas but they will not keep replacing the board FOC. How can I stop his happening? The boiler is 7 years old and I have not had this problem until recently so what will have...
  13. eagleeye

    Connecting Rayburn to boiler circuit

    Just been to a customer where on of our installers fitted a new viessmann heat only. They have an issue with the boiler not switching on. Talking to the customer over the phone the problem sounded like a blockage so I suggested a powerflush. Anyway after today's visit I found that he has a...
  14. P

    Can a TMV fail on such a way as to create a 'short circuit' from cold to hot?

    Hi, everyone - I hope someone can point out the obvious thing that I'm sure I've overlooked. I have a DHW problem. I have a 210 litre indirect cylinder (Megaflo) with secondary circulation. There are 9 'drops' off the hot loop - all at the far end of the loop. Not all of the pipe run is...
  15. w7r

    Bathroom plumbing advice - secondary hot circuit

    Afternoon all. After a bit of advice/guidance. I'm currently refurbing my 1st-floor bathroom and the ancient plumbing system in the house whilst I'm at it. It'll have a shower, toilet, basin and a standard size bath. I'm planning a secondary circuit (in copper) for hot water (22mm in and a...
  16. B

    Electric shower circuit breaker query

    Hi I have a thermostat shower which replaced the previous electric shower. I was checking my fuse box in the cupboard and the electric shower circuit breaker is down (off), does that mean it is safely turned off. Just wanted clarity that if a circuit breaker is in the down position that means...
  17. H

    Which towel rads don't leak when run off softened hw circuit?

    Hi, hope someone can help me find a solution to this problem please. I have 3 wet, stainless steel, ladder towel rads fed from pressurised ch/hw system including ufh throughout(no other rads). House was built 2 years ago. We had a tablet salt water softener fitted 3 months after moving in...
  18. R

    Temporary Radiator removal on UFH circuit

    Just about to remove a rad for plaster, but it’s on a UFH manifold. Having not removed one on a UFH manifold before, wanted to check the process with minds more in the know. Is the following about right? • Close off rad circuit actuator/pin with decorating cap, to stop flow. • Remove rad in...
  19. S

    How likely is that that my installer fried my circuit board?

    Yesterday we had an "installer" come and try to install a new WB Greenstar 25 boiler while I was at work. When I got home, my wife said that it didn't work when he tried connecting it to the fused spur switch, so he then tried adding a three pin plug to it, but that kept tripping the the fuse...
  20. P

    UFH works only in one circuit

    Hello, In my house I have UFH on the ground floor. It works in a very strange way. I am sure that it never heats up well because I have never had warm floor(I set 21 degree, that's low but I should feel it at least), but I also see some issues. All 6 circuits are for the same room and I do...
Creating content since 2001. Untold Media.

OFFICIAL SPONSORS

OFFICIAL SPONSORS

Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock