Megaflow water system

[doitall]

Storing all that water at 85c in a sludge bucket at 10 bar, sounds very risky Salesman.

What precaution would you suggest the homeower could take to protect the poor kids from Death by scalding.

 

[Water Systems]

On a previous topic, at 12:48 am on Friday July 7th:

I never insult people.

And yet...

This is softus in the head. Barking mad.

 

[ididdidi]

Thermals stores have a coil inside which conveys the cold water at mains pressure usually 3 Bar into the cylinders coil, if the pressure reducing valve is properly maintained there should be no problem well there is the manufacturers first get out as how many home owners have their thermal stores serviced regularly? didn't mention that one earlier did you?

Once the water enters the store it is very rapidly heated to a temperature of lets say 60C under flow conditions, given that the store is hopefully maintained at 70 - 75C by the heat source as per MI.

This is then mixed on the outside of the cylinder at the blending valve and distributed as called for. There is massive thermal expansion and contraction going on all the time during this process least of all when the hot tap is shut quickly and the mains continues however briefly, which may happen under surge if the pressure reducing valve was not functioning correctly or due to the incoming being 22 and the usual 15 after to draw offs, so we could already be at over 3 bar, then it is heated pretty much instantaneously from say 15C to 70C standing in the cylinder raising the pressure even further how many times does this happen a day? and with no where to go as the non return valve will not let it back quite rightly, there is a lot of expansion happening at this point. The water pressure goes from whats the pressure in the pipe under max flow conditions? 1 Bar? to may be 5? 6? bar very quickly, couple this with the customer has been in the airing cupboard for their yearly play, pushed the shrader on the surge arrester valve and seen water coming out so in their opinion the system is bled of all air cos they don't know any better or even worse an untrained plumber / heating engineer.

I have had this conversation with a really lovely gentleman who is industry recognised and a known authority on this subject, he was also instrumental in the manufacturers and NHBC admitting to fault on a large Lincolshire development which resulted in over 300 cylinders being replaced under warranty as the 1/4 litre surge arrestor or expansion vessel call it what you will was proved to be inadequate.

only an aquaintances and my thoughts on the subject look forward to the reply.

Cheers Clive

 

[Water Systems]

Storing all that water at 85c in a sludge bucket at 10 bar, sounds very risky Salesman.

What precaution would you suggest the homeower could take to protect the poor kids from Death by scalding.

Heh Chav, are you still at it! Haven't learnt a thing have you? Temp is 70-75C

Sludge? Never ever come across it. Proper kit does not sludge up. When Chavs get their hands on it, it may though.

Scaling? How abouit TMV? Heard of them in Bath yet?

 

[doitall]

Storing all that water at 85c in a sludge bucket at 10 bar, sounds very risky Salesman.

What precaution would you suggest the homeower could take to protect the poor kids from Death by scalding.

Heh Chav, are you still at it! Haven't learnt a thing have you? Temp is 70-75C

Sludge? Never ever come across it. Proper kit does not sludge up. When Chavs get their hand son it, it may though.

Scaling? How abouit TMV? Heard of them in Bath yet?

Yep heard of them in Bath Salesman, Don't they require a weekly temperture check and adjustment, shall we say £50 a week.

 

[Water Systems]

Thermals stores have a coil inside which conveys the cold water at mains pressure usually 3 Bar into the cylinders coil, if the pressure reducing valve is properly maintained there should be no problem well there is the manufacturers first get out as how many home owners have their thermal stores serviced regularly? didn't mention that one earlier did you?

No thermals store maker specifies an annual service. BTW, Heat banks have a plate heat exchanger not a coil. The plates can take up to 10 bar.

Once the water enters the store it is very rapidly heated to a temperature of lets say 60C under flow conditions, given that the store is hopefully maintained at 70 - 75C by the heat source as per MI.

This is then mixed on the outside of the cylinder at the blending valve and distributed as called for. There is massive thermal expansion and contraction going on all the time during this process least of all when the hot tap is shut quickly and the mains continues however briefly, which may happen under surge if the pressure reducing valve was not functioning correctly or due to the incoming being 22 and the usual 15 after to draw offs, so we could already be at over 3 bar, then it is heated pretty much instantaneously from say 15C to 70C standing in the cylinder raising the pressure even further how many times does this happen a day? and with no where to go as the non return valve will not let it back quite rightly,

None return valve not mandatory as in unvented cylinders.

there is a lot of expansion happening at this point. The water pressure goes from whats the pressure in the pipe under max flow conditions? 1 Bar? to may be 5? 6? bar very quickly,

It does? Are you sure or are you making this up? I like fun.

couple this with the customer has been in the airing cupboard for their yearly play, pushed the shrader on the surge arrester valve and seen water coming out so in their opinion the system is bled of all air cos they don't know any better or even worse an untrained plumber / heating engineer.

My oh my!!! You are making this up.

I have had this conversation with a really lovely gentleman who is industry recognised and a known authority on this subject, he was also instrumental in the manufacturers and NHBC admitting to fault on a large Lincolshire development which resulted in over 300 cylinders being replaced under warranty as the 1/4 litre surge arrestor or expansion vessel call it what you will was proved to be inadequate.

So the surge arrestor too small, so all stores are useless. What logic!!!!

Read again what I wrote.

 

[Softus]

Another insult

I'd prefer to be mad than a hypocrite and a fool.

 

[Water Systems]

Another insult

I'd prefer to be mad than a hypocrite and a fool.

You got it all then.

MOD 2

pack it in or go back to screwfix i am not having this on my forum bonny lad