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The boiler fires up when you run cold water because it is responding to a drop in water pressure caused by the increased demand for water. The boiler is designed to maintain a consistent water pressure in the system, so it automatically fires up to heat more water and maintain the desired pressure.
What else can I help you with?
Why does your cold water run out when running a bath?
Running a bath involves using a larger volume of water compared to just using cold water for other purposes, such as for drinking or washing hands. If your cold water runs out during a bath, it may indicate that your water heater is not able to keep up with the demand for hot water needed to fill the tub, or that the hot and cold water supply in your home is imbalanced. This can be due to various factors such as the size and capacity of your water heater, the water pressure in your plumbing system, or issues with your plumbing fixtures.
Why does my cold water pipe make loud ringing noise only when the weather is cold and when we run the hot tap?
The ringing noise is likely due to thermal expansion of the pipes when hot water runs through them, causing them to rub against other surfaces. The noise is more noticeable in cold weather when the temperature contrast between the hot water and the cold water pipes is greater. Ensuring proper insulation and securing the pipes can help reduce or eliminate the noise.
How is the boiling point affected in a pressurized boiler system?
For the purpose of this answer let me rephrase your questions to be more definite. As once the steam leave a boiler we can assume it remains in a gaseous state until it energy is absorbed by some load/ demand. How is the boiling point affected in a pressurized boiler? The short answer... As pressure goes up the boiling point goes up. Example... When the fire is lit in the firebox of a boiler we will assume that the pressure is 0 psig. As heat is added by the fire the water will boil at around 212 degrees F, and so long as there is no load to absorb this heat and the firing rate is kept the same the water will continue to change state into steam and the pressure will rise inside the unit. Here is where we see the boiling point rising as the pressure increases. There is a fairly lengthly formula you can run through to calculate this but in the field we use charts called Steam Tables, in this example you would be looking at a Saturated Steam Table. If you looked at this table you would see that at 10 psig the temperature indicates is around 240 degrees. Now for the long formula... http://en.wikipedia.org/wiki/Boiling_point#Saturation_temperature_and_pressure
What makes the water hot or cold?
Hot water comes from a water tank whose contents are heated by either gas or electricity (some are solar). The cold water line and the hot water line run to a valve at which the user is able to blend a comfortable mix of both for various cleaning issues.
How is heat being transfered when you place your finger in the cold beaker why?
If the beaker has a cold water, or something else cold, in it than the heat that is in our finger will run out of you finger into the cold water. This leaves your finger 'empty' of heat, giving you the sensation of being cold. You need to remember that only heat moves. When you are cold you wear a jumper that keeps the heat in your body, not keep the cool out.
Which cheaper to run a combi boiler or a hot water boiler in your home?
combi
Types of boiler in power plant?
There are a great many different kinds of power plants in the world. These power plants can be run by water for example.
Why does the bath hot tap with a total control boiler run hot only when run slowly then suddenly give cold water for awhile and then hot water again?
If it is an instant hot water heater, there is warm water in it to begin with. When new water runs throught, it takes a few moments for the elment to heat up and make the water hot, therefore some cold water will get through until it heats up.
Can you run your boiler with the water shut off?
For a while IF the boiler has an automatic low water cut off and other safety devices but if any fail you will have a melt down and an explosion
Is cold water run on electricity?
Only in water coolers.
What makes my hot boiler run an shut off then run an shut off?
When it achieves the maximum temperature, it shuts off. Then when there is demand for the water, or it is at its low setting, the boiler fires up again until it reaches the maximum temperature set.
What are your options for changing my hot water setup when my water is heated by a oil boiler now?
The best option is to put in a separate water heater for the summer and and other warm months when you don't need to run the boiler for heat. When it is winter and the boiler is running to heat the house it will heat the potable water as well. By switching back and forth you will save money on your oil bill.
Why does your furnace circulate hot water through baseboard elements when the thermostats are not calling for heat?
not sure of your application but possibly the pump on the boiler is set to run continuously and the thermostat energises the boiler itself.
How do trains run on coal?
Only (some) steam engines used coal. It was burnt in a boiler to heat water to steam.
Why is my hot water suddenly less hot Seems my combi boiler doesn't produce as much hot water as it used to The radiators dont get hot and I have to run the shower or taps on a trickle for warm water?
It could be a number of reasons. If it's still 'firing up' when you turn on the taps, it sounds like there could be a problem with the pump. If the pump is malfunctioning, the water will still heat a small amount of water, but then that has no way to get around the system efficiently. --------------------------- Thank you! Yes, it does fire up and the first bout of water is very hot, then it seems to go cold but if I then reduce the flow it stays warm and is fairly stable. It will eventually go cold but I'm assuming that's when the boiler stops firing due to the low flow. I've also noticed that if I have the temperature on high on the shower, I have to reduce the flow much further to get warm water (just a trickle) whereas if I turn the temperature down, I can run it on a higher flow and achieve the same temperature.
If you want the water heat to make hot water can you run cold water?
yes
Should the overflow from the boiler constantly run?
No.
