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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Running a combination boiler without central heating connected?
Can one temporarily short out, with a pipe, the central heating circuit of
a combination boiler, so that I can get the DHW working first, and do the central heating later? Clearly in summer the hot water will work OK with the central heating not working. The cylinder has to go first before I can fit the combination boiler, can be fitted. -- Dave Fawthrop dave hyphenologist co uk "Intelligent Design?" my knees say *not*. "Intelligent Design?" my back says *not*. |
#2
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At a guess I would think that most would cope fine as long as that pipe
used to short the circuit had a radiator in it. I would think that nasty things could happen if it is just a short bit of pipe - it wouldn't take much for the boiler firing the heating circuit up to lead to superheated water ( 100C). What boiler is it? |
#3
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Matt Beard wrote: At a guess I would think that most would cope fine as long as that pipe used to short the circuit had a radiator in it. I would think that nasty things could happen if it is just a short bit of pipe - it wouldn't take much for the boiler firing the heating circuit up to lead to superheated water ( 100C). What boiler is it? Check the instructions. If the boiler already has a automatic bypass, then it should be ok to isolate the radiator circuit. Otherwise just install the bypass across flow/return and isolate the circuit below it. |
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On 30 Aug 2005 01:32:45 -0700, "Matt Beard" wrote:
| At a guess I would think that most would cope fine as long as that pipe | used to short the circuit had a radiator in it. I would think that | nasty things could happen if it is just a short bit of pipe - it | wouldn't take much for the boiler firing the heating circuit up to lead | to superheated water ( 100C). | | What boiler is it? Not chosen it yet. -- Dave Fawthrop dave hyphenologist co uk "Intelligent Design?" my knees say *not*. "Intelligent Design?" my back says *not*. |
#5
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In message , Dave Fawthrop
writes On 30 Aug 2005 01:32:45 -0700, "Matt Beard" wrote: | At a guess I would think that most would cope fine as long as that pipe | used to short the circuit had a radiator in it. I would think that | nasty things could happen if it is just a short bit of pipe - it | wouldn't take much for the boiler firing the heating circuit up to lead | to superheated water ( 100C). | | What boiler is it? Not chosen it yet. In that case I very much doubt that there are any condensing boilers which will allow DHW without there being pressure in the CH circuit -- geoff |
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In message . com, Matt
Beard writes At a guess I would think that most would cope fine as long as that pipe used to short the circuit had a radiator in it. I would think that nasty things could happen if it is just a short bit of pipe - it wouldn't take much for the boiler firing the heating circuit up to lead to superheated water ( 100C). What boiler is it? If you don't know, don't guess -- geoff |
#7
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Permission to breathe, Your Holiness?
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In message . com, Matt
Beard writes Permission to breathe, Your Holiness? Were you replying to me ? Since you snipped everything, nobody has a clue what you're referring to -- geoff |
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Permission to breathe, Your Holiness?
Were you replying to me ? Since you snipped everything, nobody has a clue what you're referring to Please refrain from posting until you know how to construct a grammatically correct sentence. You ended your previous effort with a preposition. Alternatively, calm down, take a few deep breaths and realise that you are not the moderator of this group and don't have a God given right to criticise other people's posting style. |
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On Tue, 30 Aug 2005 01:32:45 -0700, Matt Beard wrote:
At a guess I would think that most would cope fine as long as that pipe used to short the circuit had a radiator in it. I would think that nasty things could happen if it is just a short bit of pipe - it wouldn't take much for the boiler firing the heating circuit up to lead to superheated water ( 100C). What boiler is it? I'd check with the manufacturers, (of course). To be on the safe side a couple of temporary connection to a temporary radiator should probably do the trick. -- Ed Sirett - Property maintainer and registered gas fitter. The FAQ for uk.diy is at http://www.diyfaq.org.uk Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html |
#11
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Ed Sirett wrote: On Tue, 30 Aug 2005 01:32:45 -0700, Matt Beard wrote: At a guess I would think that most would cope fine as long as that pipe used to short the circuit had a radiator in it. I would think that nasty things could happen if it is just a short bit of pipe - it wouldn't take much for the boiler firing the heating circuit up to lead to superheated water ( 100C). What boiler is it? I'd check with the manufacturers, (of course). To be on the safe side a couple of temporary connection to a temporary radiator should probably do the trick. I'd be careful if I were you - I gave an almost identical answer and got right royally jumped on for giving an answer that was not 100% copper bottomed guaranteed to be correct. |
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On Thu, 01 Sep 2005 09:14:38 -0700, Matt Beard wrote:
Ed Sirett wrote: On Tue, 30 Aug 2005 01:32:45 -0700, Matt Beard wrote: At a guess I would think that most would cope fine as long as that pipe used to short the circuit had a radiator in it. I would think that nasty things could happen if it is just a short bit of pipe - it wouldn't take much for the boiler firing the heating circuit up to lead to superheated water ( 100C). What boiler is it? I'd check with the manufacturers, (of course). To be on the safe side a couple of temporary connections to a temporary radiator should probably do the trick. I'd be careful if I were you - I gave an almost identical answer and got right royally jumped on for giving an answer that was not 100% copper bottomed guaranteed to be correct. I have run a (Vaillant) combi without the rads for a day, just using the flow/return isolators shutoff. This allowed me to get the customer's hot water back on at the end of the first day's work. I was very careful to make sure that the air was well out of the boiler, it was considerable noiser as there was no where for the small air bubble to escape to. If anyone does this and they damage their nice new boiler then it's nothing to do with me. -- Ed Sirett - Property maintainer and registered gas fitter. The FAQ for uk.diy is at http://www.diyfaq.org.uk Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html |
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On Fri, 02 Sep 2005 23:59:20 +0100, Ed Sirett
wrote: | On Thu, 01 Sep 2005 09:14:38 -0700, Matt Beard wrote: | | | Ed Sirett wrote: | On Tue, 30 Aug 2005 01:32:45 -0700, Matt Beard wrote: | | At a guess I would think that most would cope fine as long as that pipe | used to short the circuit had a radiator in it. I would think that | nasty things could happen if it is just a short bit of pipe - it | wouldn't take much for the boiler firing the heating circuit up to lead | to superheated water ( 100C). | | What boiler is it? | | I'd check with the manufacturers, (of course). | | To be on the safe side a couple of | temporary connections to a temporary radiator should probably do the | trick. | | | I'd be careful if I were you - I gave an almost identical answer and got | right royally jumped on for giving an answer that was not 100% copper | bottomed guaranteed to be correct. | | I have run a (Vaillant) combi without the rads for a day, just using the | flow/return isolators shutoff. This allowed me to get the customer's hot | water back on at the end of the first day's work. | | I was very careful to make sure that the air was well out of the boiler, | it was considerable noiser as there was no where for the small air | bubble to escape to. | | If anyone does this and they damage their nice new boiler then it's | nothing to do with me. OK OK. Plans have changed. I am re-routing the central heating pipes first, so they can be just connected to the new boiler when it arrives. -- Dave Fawthrop dave hyphenologist co uk "Intelligent Design?" my knees say *not*. "Intelligent Design?" my back says *not*. |
#14
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In message , Dave Fawthrop
writes Can one temporarily short out, with a pipe, the central heating circuit of a combination boiler, so that I can get the DHW working first, and do the central heating later? Clearly in summer the hot water will work OK with the central heating not working. The cylinder has to go first before I can fit the combination boiler, can be fitted. No, not usually, but then you didn't say what boiler it is Most combi boilers expect to see pressure in the central heating circuit as this is what is directly heated - which then heats the hot water -- geoff |
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