Can I have the boiler on? cold water in kitchen, no water anywhere else.

J

Jane Doe

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I have cold water in kitchen, no water anywhere else. There is water in the hot water cylinder but none will come out as none is going in. That is as i understand it.

My question is can i have the boiler on? There seems no option to turn off the hot water heat of the boiler or have it heat rads but stop it heating the cylinder.

If I turn it off upstairs will that stop it heating the cyliner as cylinder/hot press is upstairs

What would hapen if the water in cylinder got too hot?
 
Do you have water in the make up tank ie the small tank above the storage tank in the attic
 
W200 said:
Do you have water in the make up tank ie the small tank above the storage tank in the attic
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I don't know. Could you give me the scenario if i do and if i don't please? I am not sure what the make up tank is and its purpose

If i did would it come down to hot press cylinder. ?

i read somewhere that if water in cylinder boils it is fed back up to the cold water tank and then circulates back to hot press cylinder. Is that right? Is that will happen if i have heat on and could you go onlike that for a while or would it evaropate.

Thanks for reply, sorry cannot answer the question
 
If you can have a look into the attic and see if you have TWO plastic tanks in there one big one small . If the SMALL tank has water in it then it would be safe to run the heating system for a few days . As you say the water in the copper cylinder would eventually evaporate but not for a few days unless you were using the heating flat out all day.
You may also have a CLOSED heating system which is fed from the mains and in this case you will not have a second attic tank
 
OK will look tomorrow. If no water in small tank can i put some in and run rads?Check it every so often and run rads while water in it
I know the water in cylinder would eventually evaporate but would it go back up first?
You may also have a CLOSED heating system
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is CLOSED same as SEALED. i think i have SEALED but not sure. it s a baxi megaflow HE IE15 codensate boiler. is the small tank a HEADER tank?
Thanks
 
Yes Closed same as sealed. Have a look around boiler for a pressure gauge and if pressure is showing on gauge its safe to use heating and you can foreget about looking in attic
 
W200 said:
Yes Closed same as sealed. Have a look around boiler for a pressure gauge and if pressure is showing on gauge its safe to use heating and you can foreget about looking in attic
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on boiler there is a circular dial which is central heating system pressure, must be at least 0.2 barm My pressure is just around 1 bar

Is that what they call indirect system
 
With pressure of 1Bar the system is safe to use.
The terms Direct and indirect refer to how your hot water is heated in copper cylinder by the boiler.
Most modern systems are indirect , In this case that is not important at moment.
Happy heating.
 
as a curiosity what will happen if the water in the cylinder overheats or evaporates
 
No major problem there apart from possibility of airlocks when the system eventually refills . If you have a look around the hotpress you may be able to find the hot supply from your boiler going into the cylinder. Some systems have a valve on this supply to stop the hot water going into the cyl and send it all to the rads . If you find this valve you can slowly close it down stopping any evaporation from the cyl. When the water returns remember to open it up again or your boiler wont heat the cyl only the rads.
 
very informative thanks. I looked in attic there is only one tank
 
Jane Doe said:
very informative thanks. I looked in attic there is only one tank
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found some info on that system.


[broken link removed]
 
there is no problem running your gas heating cylinder will not over heat as the boilers thermostat will ensure this, if you had a leakage in your heating system your baxi will will fire ie no water in ch system, the boiler has many safety control systems in place to prevent boiler from firing and over heating any part of system.

you see years ago in Ireland people only has solid fuel boiler which needed the hot water cylinder as an integral part of the heating system, if the system overheated every person knows you run the hot tap in the bath to cool the solid fuel boiler in turn it embedded into the Irish people that if you haven't any water in the house you cant run your boiler...not so with modern oil and gas boilers.
 
Thanks. i still do not see how to heat rads but not cylinder in hot press
there is no problem running your gas heating cylinder will not over heat as the boilers thermostat will ensure this
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it is cylinder in hot press i am worried about. Have water again but just want to know as much as poss for next cold snap
 
OK, if you go to your hot press n have a look at the copper cylinder 'standard cylinder' on the very top of cyl yo have the hot water outlet, now if you can see a connection at very bottom 'lowest to the ground' with a pipe attached running up to the ceiling that's the feed/hotwater for cylinder.
the connections you are concerned about are ruffly 1/4 way from top and 1/4 way from the bottom in line with each other these are the heating connections that heat the hot water in the cylinder with your gas boiler, now if you follow these pipes to where they go in the hotpress you should find a wheel head valve 'red', to shut off heating to cyl just turn this valve clockwise till loosely tight.
in normal operation of the heat supply to the cyl this valve should be turned anticlockwise two full rotations from the closed position.
TIP: put a mark on the wheel head to gauge two full revolutions.
 
esox, thanks but i do not understand it all . i have 2 red wheel valves 3/4 way up in hot press. i see where the water comes into the bottom of cylinder in hot press and where it goes out at top

But these two red valves confuse me. they are on pipes where there are 4 pipes and two have red wheel valves. One pipe is the feed from the mains to refill the upstair stank i think but which one. can i turn off both wheel valves, let out some water fom taps and then open red wheel valves one at a time to see which is which. Is it OK to stop the mains fed like that?
 
its really confusing

Jane, its really confusing at times when you don't really understand what the people has to mean. I do feel that too, Maybe, its much better to contact an engineer who could see that or a plumber to assist you and explain to you every bit of it..
 
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