Posted by Leachim Sredna on May 14, 2011, 8:27 pm
I'm open to any practical, specific suggestion. Who can build:/supply me
with a suitable regulator ? Remember, I am in France, the appliance must run
off a 12 volt DC system. Also, I'm a man of very modest financial means.
Thanks in advance and thanks too to The other Rick.
Leachim
> On Mon, 25 Apr 2011 13:59:15 +0200, "Leachim Sredna"
>>Sorry the delay in replying to your suggestion, Rick.
>>
>>Yes that's definitely the sort of thing I've been looking for. The
>>description of its operation corresponds well with that of my regulator
>>when
>>the latter works. With a major difference, however, it seems : the one
>>described on the link you provided uses some temperator sensos called an
>>LM335 ("and its associated trimpot", whatever that is).
>>My present system uses two PT100 sensors. I am loathe to change to other
>>kinds of sensors as I have these, I ordered them specially, they are
>>fairly
>>expensive, and they are very easy to fix to the solar panel exit and the
>>water reservoir (no gluing etc - just a simple mechancial clip. I also use
>>a
>>bit of thermal paste.)
>>
>>As it happens, I changed the CA3130E (that's the correct name) component a
>>few days ago, and the regulator seems to be working as it should once
>>again.
>>So I 'm keeping my fingers crossed.
>>
>>The ideal thing would be for me to build (or have someone build - I've
>>never
>>used a soldering iron) a similar regulator to the one I have (it was
>>custom-built some several years ago for the prevbious owner of my house),
>>while at the same time improving it and including some fuses and:or other
>>protection against failure due to lightning or other cause of overload.
>>
>>Thanks in any event. I keep learning this way.
>>
>>Leachim Sredna
>>
>>> On Sun, 17 Apr 2011 22:27:52 +0100, "Rick... (The other Rick)"
>>>
>>>>On Sat, 16 Apr 2011 01:00:07 +0200, "Leachim Sredna"
>>>>
>>>>>Hello Group,
>>>>>
>>>>>I need a new controller/:regulator for my solar water heating system.
>>>>>It
>>>>>should be as simple as possible, to switch the circulation pump on and
>>>>>off
>>>>>acording to the temperature difference between the solar heating panels
>>>>>and
>>>>>the hot waer reservoir, and suitable for a 12 Volts DC electrical
>>>>>system
>>>>>and
>>>>>use my existing PT100 probes.
>>>>>
>>>>>You'd think it would be an easy thing to find but I can't find one
>>>>>anywhere.
>>>>>I'd even have one made to measure if anybody knows how this could be
>>>>>done.
>>>>>
>>>>>I have the remains of the original, custom-made regulator, which uses
>>>>>an
>>>>>EC
>>>>>3130E comparator (I think), but this fails regularly, either due to
>>>>>electrical storms which destroy the PT100 probes or because some otehr
>>>>>part
>>>>>such as the EC 3130E or a capacitor fails, for reasons unknown.
>>>>>
>>>>>Someone please help, I'm going mad controlling the thing manually now
>>>>>that
>>>>>the sunny weather is back in the South of France where the system is
>>>>>situated. If I'm too slow or forget, the system airlocks with
>>>>>high-pressure
>>>>>steam...
>>>>>
>>>>>Thanks in advance
>>>>>
>>>>>Leachim Sredna
>>>>>
>>>>>
>>>>
>>>>
>>>>Look at
>>>>http://www.alectronics.net/2011/03/solar-hot-water-panel-differential-pump.html
>>>>and make your own.
>>>>
>>>>Rick... (The other Rick)
>>>
>>> Is this what you wanted?
>>>
>>> Rick... (The other Rick)
>>
> The PT100 probes (Thermocouple) cost approx £20.00 each from Amazon UK
> The LM335 sensors cost approx £1.20 each from Farnell UK
> For thermocouples to be destroyed on a regular basis, seems to me bad
> design.
> I would suggest that you get somebody local to make the circuit for you,
> and shield everything.
> A enthusiast should be able to build you a unit for less than the cost of
> two thermocouples.
> Good Luck....
> Rick... (The other Rick)
Posted by Rick... (The other Rick) on May 15, 2011, 10:39 pm
wrote:
>I'm open to any practical, specific suggestion. Who can build:/supply me
>with a suitable regulator ? Remember, I am in France, the appliance must run
>off a 12 volt DC system. Also, I'm a man of very modest financial means.
>Thanks in advance and thanks too to The other Rick.
>Leachim
>> On Mon, 25 Apr 2011 13:59:15 +0200, "Leachim Sredna"
>>
>>>Sorry the delay in replying to your suggestion, Rick.
>>>
>>>Yes that's definitely the sort of thing I've been looking for. The
>>>description of its operation corresponds well with that of my regulator
>>>when
>>>the latter works. With a major difference, however, it seems : the one
>>>described on the link you provided uses some temperator sensos called an
>>>LM335 ("and its associated trimpot", whatever that is).
>>>My present system uses two PT100 sensors. I am loathe to change to other
>>>kinds of sensors as I have these, I ordered them specially, they are
>>>fairly
>>>expensive, and they are very easy to fix to the solar panel exit and the
>>>water reservoir (no gluing etc - just a simple mechancial clip. I also use
>>>a
>>>bit of thermal paste.)
>>>
>>>As it happens, I changed the CA3130E (that's the correct name) component a
>>>few days ago, and the regulator seems to be working as it should once
>>>again.
>>>So I 'm keeping my fingers crossed.
>>>
>>>The ideal thing would be for me to build (or have someone build - I've
>>>never
>>>used a soldering iron) a similar regulator to the one I have (it was
>>>custom-built some several years ago for the prevbious owner of my house),
>>>while at the same time improving it and including some fuses and:or other
>>>protection against failure due to lightning or other cause of overload.
>>>
>>>Thanks in any event. I keep learning this way.
>>>
>>>Leachim Sredna
>>>
>>>> On Sun, 17 Apr 2011 22:27:52 +0100, "Rick... (The other Rick)"
>>>>
>>>>>On Sat, 16 Apr 2011 01:00:07 +0200, "Leachim Sredna"
>>>>>
>>>>>>Hello Group,
>>>>>>
>>>>>>I need a new controller/:regulator for my solar water heating system.
>>>>>>It
>>>>>>should be as simple as possible, to switch the circulation pump on and
>>>>>>off
>>>>>>acording to the temperature difference between the solar heating panels
>>>>>>and
>>>>>>the hot waer reservoir, and suitable for a 12 Volts DC electrical
>>>>>>system
>>>>>>and
>>>>>>use my existing PT100 probes.
>>>>>>
>>>>>>You'd think it would be an easy thing to find but I can't find one
>>>>>>anywhere.
>>>>>>I'd even have one made to measure if anybody knows how this could be
>>>>>>done.
>>>>>>
>>>>>>I have the remains of the original, custom-made regulator, which uses
>>>>>>an
>>>>>>EC
>>>>>>3130E comparator (I think), but this fails regularly, either due to
>>>>>>electrical storms which destroy the PT100 probes or because some otehr
>>>>>>part
>>>>>>such as the EC 3130E or a capacitor fails, for reasons unknown.
>>>>>>
>>>>>>Someone please help, I'm going mad controlling the thing manually now
>>>>>>that
>>>>>>the sunny weather is back in the South of France where the system is
>>>>>>situated. If I'm too slow or forget, the system airlocks with
>>>>>>high-pressure
>>>>>>steam...
>>>>>>
>>>>>>Thanks in advance
>>>>>>
>>>>>>Leachim Sredna
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>Look at
>>>>>http://www.alectronics.net/2011/03/solar-hot-water-panel-differential-pump.html
>>>>>and make your own.
>>>>>
>>>>>Rick... (The other Rick)
>>>>
>>>> Is this what you wanted?
>>>>
>>>> Rick... (The other Rick)
>>>
>>
>> The PT100 probes (Thermocouple) cost approx £20.00 each from Amazon UK
>> The LM335 sensors cost approx £1.20 each from Farnell UK
>>
>> For thermocouples to be destroyed on a regular basis, seems to me bad
>> design.
>>
>> I would suggest that you get somebody local to make the circuit for you,
>> and shield everything.
>> A enthusiast should be able to build you a unit for less than the cost of
>> two thermocouples.
>>
>> Good Luck....
>> Rick... (The other Rick)
Google "Differential Thermostat" There's tons of info and suppliers out there.
Good Luck...
Rick... (The other Rick)
XML site map
>>Sorry the delay in replying to your suggestion, Rick.
>>
>>Yes that's definitely the sort of thing I've been looking for. The
>>description of its operation corresponds well with that of my regulator
>>when
>>the latter works. With a major difference, however, it seems : the one
>>described on the link you provided uses some temperator sensos called an
>>LM335 ("and its associated trimpot", whatever that is).
>>My present system uses two PT100 sensors. I am loathe to change to other
>>kinds of sensors as I have these, I ordered them specially, they are
>>fairly
>>expensive, and they are very easy to fix to the solar panel exit and the
>>water reservoir (no gluing etc - just a simple mechancial clip. I also use
>>a
>>bit of thermal paste.)
>>
>>As it happens, I changed the CA3130E (that's the correct name) component a
>>few days ago, and the regulator seems to be working as it should once
>>again.
>>So I 'm keeping my fingers crossed.
>>
>>The ideal thing would be for me to build (or have someone build - I've
>>never
>>used a soldering iron) a similar regulator to the one I have (it was
>>custom-built some several years ago for the prevbious owner of my house),
>>while at the same time improving it and including some fuses and:or other
>>protection against failure due to lightning or other cause of overload.
>>
>>Thanks in any event. I keep learning this way.
>>
>>Leachim Sredna
>>
>>> On Sun, 17 Apr 2011 22:27:52 +0100, "Rick... (The other Rick)"
>>>
>>>>On Sat, 16 Apr 2011 01:00:07 +0200, "Leachim Sredna"
>>>>
>>>>>Hello Group,
>>>>>
>>>>>I need a new controller/:regulator for my solar water heating system.
>>>>>It
>>>>>should be as simple as possible, to switch the circulation pump on and
>>>>>off
>>>>>acording to the temperature difference between the solar heating panels
>>>>>and
>>>>>the hot waer reservoir, and suitable for a 12 Volts DC electrical
>>>>>system
>>>>>and
>>>>>use my existing PT100 probes.
>>>>>
>>>>>You'd think it would be an easy thing to find but I can't find one
>>>>>anywhere.
>>>>>I'd even have one made to measure if anybody knows how this could be
>>>>>done.
>>>>>
>>>>>I have the remains of the original, custom-made regulator, which uses
>>>>>an
>>>>>EC
>>>>>3130E comparator (I think), but this fails regularly, either due to
>>>>>electrical storms which destroy the PT100 probes or because some otehr
>>>>>part
>>>>>such as the EC 3130E or a capacitor fails, for reasons unknown.
>>>>>
>>>>>Someone please help, I'm going mad controlling the thing manually now
>>>>>that
>>>>>the sunny weather is back in the South of France where the system is
>>>>>situated. If I'm too slow or forget, the system airlocks with
>>>>>high-pressure
>>>>>steam...
>>>>>
>>>>>Thanks in advance
>>>>>
>>>>>Leachim Sredna
>>>>>
>>>>>
>>>>
>>>>
>>>>Look at
>>>>http://www.alectronics.net/2011/03/solar-hot-water-panel-differential-pump.html
>>>>and make your own.
>>>>
>>>>Rick... (The other Rick)
>>>
>>> Is this what you wanted?
>>>
>>> Rick... (The other Rick)
>>
> The PT100 probes (Thermocouple) cost approx £20.00 each from Amazon UK
> The LM335 sensors cost approx £1.20 each from Farnell UK
> For thermocouples to be destroyed on a regular basis, seems to me bad
> design.
> I would suggest that you get somebody local to make the circuit for you,
> and shield everything.
> A enthusiast should be able to build you a unit for less than the cost of
> two thermocouples.
> Good Luck....
> Rick... (The other Rick)