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Step 1 Shut Off the Power and. Hi everyone this video is about immersion heater circuit quite simple dedicated circuit 25 mm tE cable from consumer unit to 20A DP switch and 25 flex he. A wiring diagram is a simplified conventional photographic representation of an electrical circuit.
Single Phase AC circuits where line voltage and current do not exceed thermostat rating. A wiring diagram is a simplified standard photographic depiction of an electric circuit. Typical Heater Wiring Diagrams The following diagrams show typical heater wiring schematics. Assortment of chromalox immersion heater wiring diagram. Quick video about How to wire immersion heater in the UKDont forget to click youtube bell icon to receive notification about new videos.
Save my name, email, and website in this browser for the next time I comment. Amarante Pruvost. June 25, How To Wire 3 Way Lighting Circuit Youtube Lighting Diagram Diy Electrical Light Switch The immersion is timed to come on overnight but usually does nothing as the boiler keeps the water hot enough so the immersion thermostat never turns on unless the boiler goes out not often but not unknown either — usually due to an empty.
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Related Post. October 26, October 26, October 26, So it can certainly make a difference to your bills. By using a thermostat along with a well-insulated hot water cylinder, then you can ensure your water remains hot for when you need it most. An environmentally friendly and cost-effective way to run your immersion heater is to link it to a renewable energy source such as solar panels. Of course, this has a pretty substantial cost upfront, however, there are government initiatives that incentivise this cost.
In January , the government introduced the Smart Export Guarantee SEG , which pays households for any excess electricity that their solar panels have generated and then distributes this across the national energy grid.
In addition to this, there is also the domestic Renewable Heat Incentive RHI which helps homeowners to access financial support to help cover upfront costs associated with renewable heating systems, however, this scheme is due to end on 31 March The answer to this question depends on your hot water needs.
If you need a steady supply of hot water throughout the day, then you can leave your immersion heater on. However, this is a costly and inefficient way to use your immersion heater and it might be worth considering a boiler or combi boiler as a better alternative.
There is no need to leave your immersion heater on all day. By using an automatic thermostat you can set the times that you want hot water. As we identified above, this can be a great way to optimise your costs and leverage off-peak rates. In addition to this, a well-insulated immersion heater can remain hot for a few hours. So even when it is off, you will still be able to take a hot shower and wash the dishes.
However, this will work better for some than others. Despite partly doing the same job, there are differences between boilers and immersion heaters. Depending on your home, what you have access to, and your needs, you can identify the best way to generate hot water for your household. Unlike an immersion heater, a boiler can provide both hot water and central heating for the house.
They usually run on either gas or oil and have pipes entering the boiler from underneath. There are typically three pipes, one feeding through the gas, one that enables cold water to enter the boiler to be heated up, and another to allow the hot water to be pumped around the house. Generally, gas and oil boilers work in the same way, with the only significant difference being that gas is supplied by a national network of pipes, whereas oil is supplied by a tank that is kept on the property.
Boilers are generally a lot more common than immersion heaters, and there are several different types of boilers. Unlike a boiler, an immersion heater only supplies hot water to a home. Immersion heaters only run on electricity, however, this could be supplied through renewable energy sources such as solar panels. As we identified above, immersion heaters are heated via an electric resistance heater that is immersed in the water, similarly to that of a kettle but on a larger scale.
I was advised by my plumber recently that the cheapest way of heating the water for me, living most of the time in a house on my own, is not to use the boiler but to keep the immersion heater on contstantly, as he said it takes very little electricity to keep it hot, and much more to heat it up from cold. This sounds different from your advice. Could you give me your reaction, please? This is because it is heating your water using kWh priced at around 13p.
Whereas if you used your boiler it would be around p. Immersion heaters should only really be used when the boiler is not working, or you need an urgent boost due to high usage. There is one more fact that has been omitted in these discussions. Whereas gas for central heating is indeed about a quarter of the cost of electricity, in a condenser boiler, the water heating is not as efficient as the central heating.
If this is true, then an immersion heater will cost only around twice as much as gas. Alan, No my point did not include heat loss from the pipework from heating to tank. I was informed by my boiler installer that when the system calls for hot water to be produced, the water heating process by-passes the condenser. Now I have tried to contact Vaillant — which produced my boiler, for confirmation — or otherwise — of this comment: so far without an answer.
Mark, You make an interesting point. I am assuming you are referring to the loss of heat from the pipework from heating to the tank? Any losses from storage in the tank will be the same if heated by the immersion or the gas, so it would only be heat lost during transport that you are referring to? Just use your boiler, make sure you have a timer as well as a cylinder thermostat though.
Dione, Absolutely make sure the tank is well insulated — that is a good point. Never, ever leave your immersion on. Not only is it more expensive per unit, but it will just keep boiling away all night costing you a fortune. I have seen people who have made this mistake spend a thousand pounds on electricity in a quarter!
This is really useful. We quite often switched on our immersion to heat up the water, but will now use the boiler going forward. Anything to save a few quid! I have a litre Heatrae Sadia Megaflo immersion tank in my one bedroom flat. My electrician fed the electrical supply from the element into a basic timer Fused spur timeswitch by TimeGuard. I am on economy 7 with OVO at approx 6p kwh night, 12p day and have my immersion on for 1 hour at 4am in the morning which allows me and my wife 2 medium length showers each per day, sometimes I use the one hour boost.
Great system and efficient as it can be with a timer on it. May I ask how many kwh it takes to heat your litre tank? Hi Nikky, it depends on the starting temp of the cold water and the end temperature you are looking to achieve.
Normally the immersion units are 3kW, so the formula is. This is 7. This is a really useful article. We had exactly this problem with our immersion heater. Told the kids to use in case of emergencies and then as soon as the shower got cold they would flick it on and then forget they had done it.
This has happened about 10 times now so need to find a way to stop it!! Hi Tina, Thanks for your comment. I see so many properties where the immersion is left on and forgotten about — it is like pouring money down the drain. We have just bought our first home and the set up is very old we bought it from an old lady who lived there for 39 years!
It is all electric and there is no gas supply in the street. The shower is electric so heats up itself, but what settings would you recommend for us to use please? Hi Chris, congratulations on the new home! The first thing to check if you want to keep the storage heaters is that you are on an Economy 7 tariff — that gives you access to the cheaper electricity.
Provided you are, you need to charge them during the hours that the electricity is cheap. You then control the heat output, so normally people will try and coincide this with when you come home from work ideally just before so the home has a bit of time to warm up. In terms of hot water, provided the hot water tank is insulated, you should be okay using the immersion for one hour a day.
You might prefer 30 mins in the morning so it is warm when you wake up and then an hour about 4 to coincide with coming home. If you are at home during the day, storage heaters can be very expensive since electricity is more expensive than gas to heat the home, so if this is the case you might want to consider the switch.
Let us know how you get on!! Sometimes these clocks wander with respect to the correct time, especially if you have an old meter , depending upon the degree of inaccuracy you may want to report this to get it corrected or not if it suits you better!
They are just like a massive kettle. I get having one for backup, but would never normally use it! Hi Simon, thanks for your comment! Hello, I wonder if you can help. They have an immersion for hot water. They definitely need central heating putting in, would they be able to qualify for any of the free boiler offers?
Would be grateful for any advice. Please help! I live in an old house! In the Summer we have lovely hot showers but in the Winter when the heating is on the showers are Luke warm! I have to manually turn the boiler on as the control panel has broken so I am therefore unable to set it to come on early in the morning.
Would it be more cost efficient to leave the boiler on all night but turn the heating off or put the emmersion heater on when I go to bed. Thank you! I have to switch it off from the circuit breaker. How can I correct this does it have to do with the thermostat on top of the immersion element , if so what should I do to correct it thanks.
Marcia the light you are referring to on the switch on the wall adjacent to the immersion heater, if it is then it sounds as though your switchfuse is faulty and will need replacing. I would suggest you contact a competent electrician to get it tested and if necessary replaced.
Hi Good post with logically flown thoughts on using immersion heater! I have 2 kw solar panels and with the summer setting in I will have output from them more enough to run other devices probably another immersion heating tank itself!
Now we have switching devices in the market that can manage the excess power. Does anyone have it and how is it performing? You will need something like what John below is using. This is normally measured and switched much faster than the individual half cycle length of the mains supply which is 10mS, so we are talking around every uS! Power is switched for a fraction of a half cycle at a time in order to manage a 3kW load!! I too have 2kW of solar panels and had them for over three years now.
I recently came across articles about automatic switching devices. There is a wireless transmitter fitted adjacent to your electric meter that sends information to the Solar iBoost. It then switches on the immersion whenever the generated solar power is over watts, so all excess power goes to the immersion.
It is great, even on a resonable sunnny day I get a tank full of hot water. I still leave on my hot water cycle on the gas fired boiler, but this now comes on early morning but as most days the tank is hot from the previous days solar input, it rarely stays on for long.
My one bedroom flat only has an immersion heater, no boiler. I work full time Monday to Friday and only need hot water for a couple of hours after work each day pm. I had it on for two weeks straight without realising the potential cost so have now turned it off and will only switch it on for a couple of hours when I get home each night so I can wash etc.
Another query which is linked to the above is that my flat has storage heaters which i think must run from the immersion heater? If so is there no way of having the flat warm when u get home without leaving the immersion on all day? Thanks in advance. From what I can tell, you have an immersion heater to produce your hot water and then storage heaters to provide your heating.
They charge during this cheap period — and the electricity is used to heat bricks and the theory is that this heat is retained until it is needed within the heater — hence the output dial on the storage heater, this sets the rate at which the heaters give up their heat once charged. The main issue with the older storage heaters is that by the time you want the heat, it tends to have leaked out, which means you need to recharge them.
In terms of the immersion, again this runs off electricity. Based on the fact you are on economy 7 am I assuming that based on the storage heaters , you should definitely heat the hot water during the night — maybe from 4am — 6am. This means that it will cost less to charge because the electricity is cheaper.
This should provide all the hot water you need for the day to be honest if the hot water tank is in anyway insulated. If you then need more hot water, just flick the immersion on for an hour or so. Hi, I just moved into a property and amount of electricity my boiler is consuming is huge. Am spending about 10 pounds a day. Is there any way you can help me to save a bit. This is not a great idea! Find the plug for the immersion and switch it off!
You only need this on for an hour or so to heat a full tank of water. Keeping it on all the time is like continuously boiling a kettle. After that you are going to need to give us a bit more detail — electric boilers are very unusual. You normally get gas boilers with hot water tanks that have electric immersion backup. If you have no electricity in your home then yes — the immersion is going to be producing your hot water but ideally this should be put on a timer so it comes on for just a couple of hours a day to help minimise your energy bills!
The tank our builder put into our new house about 10 years ago only seems to be very poor only having about 25 mm of insulation on it and the inside of our airing cupboard was always very warm. Firstly I have covered all the hot pipes with foam pipe insuation cut with a sharp kitchen knife and mitre the corners on pipe bends for a neat job occasionaly held in place with insulation tape. I then bought a 75 mm tie on foam jacket from screwfix — it is in six panels so that you can allow for pipes.
Do NOT cover the immersion heater but take the insulation round it. So my tank now has mm insulation and now only a warm, but not hot airing cuboard. A well insulated storage tank will loose about 2kw per day, or about 30p although perhaps poor plumbing might increase this. Then there is the question of thermostat settings. My advice would be to set the thermostat so that the water is actually a little too hot. Although I could configure the code to not turn on both relays at the same time, there was a risk that if the microcontroller crashed or hung, both relays could come on at the same time.
So, the solution is to use the first relay to provide power and the second relay to switch the power between the main and boost elements. When both relays are off, power is off. With the power relay on and the second relay off, the main element is powered. With the power relay on and the second relay on, the boost element is powered. At no point can both elements be powered at the same time. The circuit was built in an IP rated box and tested, then installed in the hot water cylinder cupboard.
Node Red was configured to control it. There are two flows. The first turns the main element on between and to heat the tank overnight. This just needs to turn the first relay on, to apply power through the normally closed contact of the second relay to the main element. A button is used on the Node Red Dashboard user interface to trigger the flow.
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