In article <c7ee5p$379$(E-Mail Removed)>, John
<(E-Mail Removed)> writes
>
>
>"Z" <(E-Mail Removed)> wrote in message
>news:(E-Mail Removed)...
>> Boiler is making whistling type noises.
>> I have cleaned out the burner, scrubbed combustion chamber, checked for
>> tow temp leaks vacuumed out the entire system.
>> Also have Fernox flushed the system through and currently re-treating.
>> No avail.
>> Swapping the thermocouple tonight anyway. I am currently suspecting the
>> burners flames at end near fuel intake burns yellow sometimes though
>> blue at other times for no apparent reason and gas burns blue elsewhere
>> along the burner block. Flame height/intensity does not seem to vary
>> with set power (scale 0 to 6) though I haven't had temperature probe on
>> it.
>
>It won't - the scale 1 to 6 are the temperature setting of simple electrical
>switch type thermostat which is either on or off and has no modulation
>ability
>>
>> I'm presuming the noise attenuation additives are a waste of time and
>> just smake oil.
>
>Well not really. The Fernox boiler noise silencer gel works remarkably well
>with rumbling boilers
>
After just changing the thermocouple I had a slightly better look at the
'plumbing' of the H/E and concluded the internal corrosion could be the
problem though given the volume of the H/E I would have expected lower
tones. I have no idea the arrangement of the heat exchanger galleries
but perhaps that could account for the pitch being higher than I would
expect.
I don't want to burn my sonoscope (or myself given my highly flmmable
face :-)}} ) listening for the source.
>> What causes a boiler to whistle?
>
>Describing sounds from a boiler is very subjective but waterside sourced
>noises often resemble a kettle on a hot stove i.e. a rumbling or bumping.
>The velocity of the gas air mix in a burner is usually too low to create a
>whistle but I have occasionally come across a whistle from the gas valve,
>strangely this is often louder just after a service when the burner/gas
>valve have been removed for access and the air inside the valve is being
>cleared but usually quietens down once purged.
>>
>> It is an Ideal Stelrad W2000 R45.
>>
>Its an old one then!
Eighties. It looks good as new now and waiting for it to pack up to get
a more efficient one. Would I get much mileage insulation-wise out of
re-lining the boiler cover with H/T fibreboard, I'd figure not.
>
>> Also want to re-seal high temperature seals, gaskets and concrete rope.
>
>Considering your extreme response re asbestos in another thread be aware
>that the "concrete rope" has a very high chance of being asbestos if the
>boiler is one of the early versions of the model.
Extreme response? The gentleman needs his loft looked at depending on
the disturbance on possible asbestos lagging. It is not very pleasant
being in a lung cancer ward.
> Best get the council in to
>clear it for you :-)
That'll be me then! :-(
The rope is fibreglass which is impregnated with a compound which when
wetted turns to concrete this is the name of the stuff I was looking
for. There was asbestos in a seal between the electrical section and
burning section until about an hour ago and there will be something
different in tomorrow evening.
>
>> One of our plumbers named the stuff to seal it with but I've forgotten
>> the name.
>
>Regin make a high temperature adhesive for asbestos/fibreglass rope joint
>material. Available from heating spares stockists
>
The C/H guy at Willie Wilsons was away by the time I got in though I'll
have time to swan past Northern Heating Friday.
--
Z
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