Cleaning secondary heat exchanger for domestic hot water
 

What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?



Steve...........

Cleaning secondary heat exchanger for domestic hot water
 

On 19 July, 15:07, dog-man wrote:
What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?

Steve...........

The local heating guy told me to pour sulfuric acid (the drain
cleaning stuff) down the CH flow or return connection until it come up
the other side and then leave it overnight before rinsing all the crap
out with lots of water, I've used citric acid in the hot water side.
Make sure its stainless steel though!

Cleaning secondary heat exchanger for domestic hot water
 

In article ,
dog-man writes:
What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?

Furnox DS-3 is the stuff to use. It's Sulphamic (not Sulphuric) Acid,
plus an indicator dye to tell you when it's used up, plus a scent so
you don't drink it. You used to be able to buy it in B&Q, and builders
merchants used to stock it, but the larger tubs have got harder to
find, so I order it from BES.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Cleaning secondary heat exchanger for domestic hot water
 

On 19 July, 18:25, (Andrew Gabriel) wrote:
In article ,
* * * * dog-man writes:

What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?

Furnox DS-3 is the stuff to use. It's Sulphamic (not Sulphuric) Acid,
plus an indicator dye to tell you when it's used up, plus a scent so
you don't drink it. You used to be able to buy it in B&Q, and builders
merchants used to stock it, but the larger tubs have got harder to
find, so I order it from BES.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Interesting, will there be any harm in using the sulphuric acid
though? I have already got a bottle and just about to pour it in the
heat exchanger.

Cleaning secondary heat exchanger for domestic hot water
 

In message
,
dog-man writes
What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?

Phosphoric acid

http://www.kamco.co.uk/FX2.htm

or sulphamic acid

http://www.globalspec.com/industrial...c_acid_cleaner

under one of the proprietry names like Fernox DS3
--
geoff

Cleaning secondary heat exchanger for domestic hot water
 

On Mon, 19 Jul 2010 07:07:08 -0700, dog-man wrote:

What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

For descaling the DHW side I use Kilrock-K ("inhibited formic acid" IIRC)
- which is also sold in diddy little bottles as kettle descaler. Then fit
a proper scale inhibitor (http://yaph.co.uk/limescale/) to stop it
happening again.

If it's blocked on the primary side then a powerflushing machine with a
PHE adaptor seems to do the trick temporarily but you'll need to address
the cause of the problem which probably means powerflushing the whole
primary system and/or fitting a Magnaclean/Boiler Buddy/equivalent filter
to the primary circuit to remove/catch crap circulating around it.



--
John Stumbles -- http://yaph.co.uk

I used to think the brain was the most interesting part of the body
- until I realised what was telling me that

Cleaning secondary heat exchanger for domestic hot water
 

In article ,
David writes:
On 19 July, 18:25, (Andrew Gabriel) wrote:
In article ,
* * * * dog-man writes:

What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?

Furnox DS-3 is the stuff to use. It's Sulphamic (not Sulphuric) Acid,
plus an indicator dye to tell you when it's used up, plus a scent so
you don't drink it. You used to be able to buy it in B&Q, and builders
merchants used to stock it, but the larger tubs have got harder to
find, so I order it from BES.

Interesting, will there be any harm in using the sulphuric acid
though? I have already got a bottle and just about to pour it in the
heat exchanger.

That's really a question for the manufacturer.
Depends what the heat exchanger is made from.
It's probably ok with stainless steel. Heated sulphuric acid
can corrode some stainless steels and the walls tend to be very thin,
but you aren't going to have it in contact for long. If it's not
stainless steel, then you'll have to say what it is.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Cleaning secondary heat exchanger for domestic hot water
 

On 20 July, 14:20, (Andrew Gabriel) wrote:
In article ,
* * * * David writes:



On 19 July, 18:25, (Andrew Gabriel) wrote:
In article ,
* * * * dog-man writes:

What's the best stuff to clean a secondary heat exchanger?

Periodically, mine needs a degunge and I use normal bog standard
descaler such as a kettle descaler.

It does work, but I was wondering if there is anything better which is
safe to use?

Furnox DS-3 is the stuff to use. It's Sulphamic (not Sulphuric) Acid,
plus an indicator dye to tell you when it's used up, plus a scent so
you don't drink it. You used to be able to buy it in B&Q, and builders
merchants used to stock it, but the larger tubs have got harder to
find, so I order it from BES.

Interesting, will there be any harm in using the sulphuric acid
though? I have already got a bottle and just about to pour it in the
heat exchanger.

That's really a question for the manufacturer.
Depends what the heat exchanger is made from.
It's probably ok with stainless steel. Heated sulphuric acid
can corrode some stainless steels and the walls tend to be very thin,
but you aren't going to have it in contact for long. If it's not
stainless steel, then you'll have to say what it is.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

It's a stainless steel from a Vaillant turboMAX