Baxi Solo 2PF - setting output temperature

HVS

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Dec 21, 2022, 5:27:04 AM12/21/22

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We've got a Baxi Solo 2 PF boiler that was installed about 10 years ago
(it's a conventional/non-condensing boiler).

I recently checked the HW and CH programme and temperature settings
(which I haven't changed for many years) -- the HW tank and immersion
heater thermostats, and slightly reducing the programmed on/off times
-- and want to check the boiler output temperature.

The thermostat dial on the boiler has the usual settings -- Off, frost
(*) and temperature settings from 1 to 6. It's current set to "4", but
I have no idea what temperature that represents.

I've poked about online, but haven't found anything that tells me how
the 1-6 settings relate to the output temperature.

Any ideas?

--
Cheers, Harvey

Fredxx

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Dec 21, 2022, 5:53:33 AM12/21/22

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Get a pipe thermometer on the flow pipe.

Make sure it has good thermal contact with the pipe, most are rather
poor and read low.

Another way is to wrap the 'flow' pipe in tape and use an IR
thermometer. The raw pipe will be reflective in the IR band, and so best
covered it with tape to provide an emissive surface.

John J

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Dec 21, 2022, 6:52:05 AM12/21/22

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Get yourself an electronic thermometer. Thermocouple types are readily available for not much money on ebay.

Tim+

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Dec 21, 2022, 7:49:40 AM12/21/22

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Just be aware that all the advice about reducing flow temperature could be
damaging to a non-condensing boiler if it has a cast iron heat exchanger.
You *don’t* want water condensing inside a boiler that isn’t corrosion
resistant or have any way of dealing with condensate.

Must admit to being a bit surprised that you could get a non-condensing
boiler as recently as 10 years ago…

Tim

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Please don't feed the trolls

John Rumm

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Dec 21, 2022, 10:47:01 AM12/21/22

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On 21/12/2022 10:27, HVS wrote:

6 will be "max" which would probably be 85 to 90 deg C...

If it is a non condenser then there is not march benefit in turning it
down other than for less pipe clanking and ticking in the warmer months
of the heating system. Make sure the return temp is 60 or higher to
precent condensation in the boiler.

--
Cheers,

John.

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Harry Bloomfield Esq

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Dec 21, 2022, 12:04:43 PM12/21/22

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On 21/12/2022 10:27, HVS wrote:

> I've poked about online, but haven't found anything that tells me how
> the 1-6 settings relate to the output temperature.

One of these, with the sensor clopped to the flow pipe, with some
insulation over the top, will be very accurate. They read in degrees C.

https://www.ebay.co.uk/itm/225084166392

A pair will enable you to watch both flow and return temperatures.

Brian Gaff

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Dec 22, 2022, 6:36:49 AM12/22/22

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Would this not to some extent depend on the loading and losses in the rads?
Brian

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Fredxx

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Dec 22, 2022, 7:52:30 AM12/22/22

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On 22/12/2022 11:36, Brian Gaff wrote:
> Would this not to some extent depend on the loading and losses in the rads?
> Brian

I'm not sure if I follow, certainly the exit/flow temperature will take
time to increase but most boilers modulate on the exit temperature. Once
it's in modulating mode the OP will be able to associate a setting
number with actual temperature.