I've just finished doing some work to (one of) my central heating
systems, ripping and replacing some pipework. I'm out of oil in the
oil tank which feeds this boiler. Is there any point throwing in some
F3 to clean out the system at the moment, or does it need heat to work?
The Fernox instructions suggest using it at normal operating temp,
which I can't achieve right now.

Piers

On Sun, 27 May 2012 10:23:34 +0100, Piers Finlayson
wrote:

I've just finished doing some work to (one of) my central heating
systems, ripping and replacing some pipework. I'm out of oil in the
oil tank which feeds this boiler. Is there any point throwing in some
F3 to clean out the system at the moment, or does it need heat to work?
The Fernox instructions suggest using it at normal operating temp,
which I can't achieve right now.

Piers


Hello,

I was in a situation a couple of years ago where my old boiler broke,
so I needed to fit a new boiler. The instructions for the new boiler
said the system must be thoroughly cleaned before use. So I needed to
use F3 but could not apply heat. I emailed fernox and I'm sure they
said F3 would work at room temperature.

I've had a quick read of the fernox web site and it says to run heated
F3 for a minimum of one hour but it can be used for up to one week.
I'm not sure what is in F3 but any chemical reaction will go faster
when hot, so I am sure this is true for F3. Perhaps using F3 at
ambient temperature for an hour will do very little but if you
circulate it for a week at ambient temperature, I'm sure it work
satisfactorily.

I added F3 and set the pump to be on continuously for a week. I
remember various plumbers came round to quote. One of them saw the
empty bottle of F3 and said it would not do anything cold. I remember
crossing him off my list for that remark, knowing that Fernox had told
me otherwise.

I don't have my original email from fernox to hand, so please double
check with them first that they have not changed their advice. It is
technical at fernox com

I guess they recommend heat for two reasons: the heat will speed the
reaction and two, because in a normal system you cannot circulate the
pump (and thus f3) without also powering the boiler (unless you turned
the boiler thermostat down).

Let us know what you pay for your oil. Mine is running low and I
wonder what the price is.

I hope that helps.
Stephen.

On 2012-05-27 16:07:54 +0000, Stephen said:

On Sun, 27 May 2012 10:23:34 +0100, Piers Finlayson
wrote:

I've just finished doing some work to (one of) my central heating
systems, ripping and replacing some pipework. I'm out of oil in the
oil tank which feeds this boiler. Is there any point throwing in some
F3 to clean out the system at the moment, or does it need heat to work?
The Fernox instructions suggest using it at normal operating temp,
which I can't achieve right now.

Piers


Hello,

I was in a situation a couple of years ago where my old boiler broke,
so I needed to fit a new boiler. The instructions for the new boiler
said the system must be thoroughly cleaned before use. So I needed to
use F3 but could not apply heat. I emailed fernox and I'm sure they
said F3 would work at room temperature.

I've had a quick read of the fernox web site and it says to run heated
F3 for a minimum of one hour but it can be used for up to one week.
I'm not sure what is in F3 but any chemical reaction will go faster
when hot, so I am sure this is true for F3. Perhaps using F3 at
ambient temperature for an hour will do very little but if you
circulate it for a week at ambient temperature, I'm sure it work
satisfactorily.

I added F3 and set the pump to be on continuously for a week. I
remember various plumbers came round to quote. One of them saw the
empty bottle of F3 and said it would not do anything cold. I remember
crossing him off my list for that remark, knowing that Fernox had told
me otherwise.

I don't have my original email from fernox to hand, so please double
check with them first that they have not changed their advice. It is
technical at fernox com

I guess they recommend heat for two reasons: the heat will speed the
reaction and two, because in a normal system you cannot circulate the
pump (and thus f3) without also powering the boiler (unless you turned
the boiler thermostat down).

Let us know what you pay for your oil. Mine is running low and I
wonder what the price is.

I hope that helps.
Stephen.

Ta, I'll give the F3 a whirl for a week.

We restocked on oil a week ago - around 59p IIRC. (Long story as to
why there's no oil in the tank for this system €¦)

Piers

On Sun, 27 May 2012 20:09:28 +0100
Piers Finlayson wrote:

On 2012-05-27 16:07:54 +0000, Stephen said:

On Sun, 27 May 2012 10:23:34 +0100, Piers Finlayson
wrote:

I've just finished doing some work to (one of) my central heating
systems, ripping and replacing some pipework. I'm out of oil in
the oil tank which feeds this boiler. Is there any point throwing
in some F3 to clean out the system at the moment, or does it need
heat to work? The Fernox instructions suggest using it at normal
operating temp, which I can't achieve right now.

Piers


Hello,

I was in a situation a couple of years ago where my old boiler
broke, so I needed to fit a new boiler. The instructions for the
new boiler said the system must be thoroughly cleaned before use.
So I needed to use F3 but could not apply heat. I emailed fernox
and I'm sure they said F3 would work at room temperature.

I've had a quick read of the fernox web site and it says to run
heated F3 for a minimum of one hour but it can be used for up to
one week. I'm not sure what is in F3 but any chemical reaction will
go faster when hot, so I am sure this is true for F3. Perhaps using
F3 at ambient temperature for an hour will do very little but if you
circulate it for a week at ambient temperature, I'm sure it work
satisfactorily.

I added F3 and set the pump to be on continuously for a week. I
remember various plumbers came round to quote. One of them saw the
empty bottle of F3 and said it would not do anything cold. I
remember crossing him off my list for that remark, knowing that
Fernox had told me otherwise.

I don't have my original email from fernox to hand, so please double
check with them first that they have not changed their advice. It is
technical at fernox com

I guess they recommend heat for two reasons: the heat will speed the
reaction and two, because in a normal system you cannot circulate
the pump (and thus f3) without also powering the boiler (unless you
turned the boiler thermostat down).

Let us know what you pay for your oil. Mine is running low and I
wonder what the price is.

I hope that helps.
Stephen.

Ta, I'll give the F3 a whirl for a week.

We restocked on oil a week ago - around 59p IIRC. (Long story as to
why there's no oil in the tank for this system €¦)

Piers


You can probably get your oil at a discount by joining a local
Syndicate. Even three pence per litre saved is worth it for 500 litres,
even more for 1000, and the service is free (or it should be). Our
local Syndicate negotiates three times per year, and orders around
40,000 litres each time. That translates into significant savings for
purchasers.
--
Davey.

On Sun, 27 May 2012 17:07:54 +0100, Stephen
wrote:

Let us know what you pay for your oil. Mine is running low and I
wonder what the price is.

http://www.cheapestoil.co.uk/articles/trend.aspx

Jim K