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exchanger

A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.

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  1. B

    Need Help

    I went out to look at a Vokera mynute 20e the other day which kept on losing pressure,I Investigated the boiler and notice the discharge was slowly dripping so i checked the expansion vessel which was spraying water when i pushed the valve in. I fitted a new vessel yesterday and the discharge...
  2. S

    has anyone seen one of these leak?

    hope you can see the pictures, anyway, i went to a job today to work on a glowworm boiler, i found a hole that is on the plastic manifold between the heat exchanger and the condence trap, it looks as if it has melted but hard to tell, the picture shows the black plastic piece that is screwed to...
  3. P

    Anyone with good knowledge of Vaillants?

    Hey Everyone, I have a little problem doing my head BIG time. Vaillant ecotec pro 28 has hot water issues. Heating works super, hot water when demanded comes at a temp of 80-90c then goes off and cold. Ive checked it for blockage in the PHEX thats OK, changed the sensors also. There is no...
  4. J

    Wolf CGB 50 reliability issues

    Hi gents......be gentle on a first time poster eh? My company have installed a number of Wolf CGB boilers, either the CGB35 or the CGB50................which as the model number suggests are around 35kw and 50kw output. Now I recall other threads on this forum suggesting that back up was...
  5. H

    No hot water to bathroom

    Any ideas! I have a Vokera compact 29 hot water to kitchen keeps running hot and cold, to bathroom when running bath not even lukewarm had thermister changed and water pressure checked noticed when water starts to run cold green light starts flashing on front of boiler its only 3years old any...
  6. D

    baxi barcelona leaking heat exchanger

    got called out to repair a leak from a heat exchanger today,it had been leaking for a while with rust every were, i put a spanner on the bolt and gave it a 1/4 turn, then the head of the bolt broke of emptying the hole c/h system on top of me. If that wasnt bad enough the half of bolt snaped...
  7. R

    Intergas Combi Compact HRE - any feedback gratefully received

    Hello All This combi comes with a dual heat exchanger which does away with a diverter valve and it does not use an APS. The heat exchanger has a 10 year warranty. All sounds marvellous. Do any of you use this boiler? Have any of you installed one? Is it any good? I'm very interested to hear...
  8. S

    Camray 5 oil boiler reheating issue

    Morning All, hopefully some here has experanced this isee as its driving me mad, My seven (ish will explain) year old boiler now won't reheat the water straight after running a bath(started doing this about a month ago) , it always used to. CH fine no issues, So here goes boilers on idle start...
  9. M

    Is it possible the heat exchanger in my boiler could be drawing in air?

    Hi Chaps, wow Am I having some serious issues with air. Basically, my pump went a couple of weeks ago. Just starting screaming really loud. So, i flushed the system and bought a new pump. Now, i cannot seem to get rid of the air. I have changed pump setting. The old pump was on 3, and i had it...
  10. T

    How to remove/clean heat exchanger Worcester 24 cdi combi.

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  11. F

    low hot water flow rate

    Hi, I have a vokera linea 28 boiler, we have had it for approx 9 years, and it is always annually serviced. The hot water flow rate is terrible and must have got this way slowly over time as I cant believe it was initially like this, the cold water rate measured at the kitchen tap is 9...
    • fossilbluff
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    • Replies: 11
    • Forum: Plumbing Jobs | The Job-board
  12. J

    whats the best way clean a blocked plate heat exchanger

    After paying £105.00 for an ideal isar plate heat excanger to replace a blocked one. me thinks the blocked one i replaced to is too good to throw away. to be honest i dont thinl a cust would save that much money by me cleaning and unblocking it due to the labour cost but it does seem a shame to...
  13. G

    Worcester greenstar 40 cdi Heat Exchanger Rumble

    Hi Guys Today a changed a gas valve on a 40 cdi and now as it burns after there's rumble (not good) sound coming from the heat exchanger. The boiler needs a service as it been requesting one for months apparently. I'm thinking it is either the gas ratios or there is just to much crap in the...
  14. I

    vokera compact 28

    hi i have a problem with compact 28 boiler . it fires up then shuts down after about 10 seconds the pump runs . now b 4 this happened it was staying on for about a minute then shutting off. i was told this was a circulation problem so had system flushed all individual rads flushed and still not...
  15. G

    Basi 90e24 blocked heat exchanger

    Hi been to a job with a biasi 90e24 and diagnosed the boiler to have a blocked dhw heat exchanger as when they draw hot water off it gets only hot when water is drawn off slowly and goes cold when opened more. Central heating is fine. Only thing is I've never changed one before as new to boiler...
  16. R

    Ideal Isar HE30 Boiler

    I have an Ideal Isar HE30 boiler that is giving me great central heating but no domestic hot water. There are no error messages but the burner keeps cutting out when I am trying to get DHW. Is this likely to be the divertor valve (expensive to replace) or something else? Any suggestions welcome
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    • Forum: Plumbing Jobs | The Job-board
  17. M

    worcester bosch problem

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  18. B

    Potterton Perfroma 24 Pressure /Heating Issues

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