Optimization method of the circulator of your boiler

[momotopo]

The problem may be that the boiler manufacturers want to sell us Mercedes S400 CDI to replace the 403 diesel ... Is it really necessary?

yes and no, it is true that the technique always costs a little and that it is not always within everyone's reach but when we see the potential of a boiler like the pulsator from Auer, the progress is worth the stroke; more than in the automobile anyway.

PITMIX, in its approach (as I understand it) wants to use, in addition to its 403 diesl, a small electric car and that's it ...

Agree with you except that his case is not really reproducible, most people do not always have the required skills or the necessary materials or even a total ignorance of the maintenance costs generated by these materials which can sometimes offset the savings achieved. It is experience that makes me say that, although I do like him, I have the ability.

[Woodcutter]

The problem may be that the boiler manufacturers want to sell us Mercedes S400 CDI to replace the 403 diesel ... Is it really necessary?

yes and no, it is true that the technique always costs a little and that it is not always within everyone's reach but when we see the potential of a boiler like the pulsator from Auer, the progress is worth the stroke; more than in the automobile anyway. [...]

I wanted to focus more on the side: "big power, big technicality" of the current offer (but I am not a specialist in the matter so my vision of boilers is perhaps biased) whereas a good house isolated knows how to be satisfied with very little ...

[bolt]

If you take for example a Grundfos brand circulator type AlphaPro 25-40, the consumption always optimized will vary from 6 to 25 watts maximum,

for information, this device when it consumes 25 watts has a yield of 32% at the best of its operating curve, ie between 1,2 and 1,6 m3 / h for about 0,2 bar of pressure
8 watts useful for the movement of water and 17 watts dissipated in calories

when it consumes 6 watt (at idle), it has an efficiency of 22%
or 1,32 watt useful, and 4,68 watts in heat
(for 0,6 m3 / h at 0,08 bar)

installed on a 20 kw boiler, 25 w represents 1 / 800th
6w represents 1/3333

bolt

[I Citro]

If you take for example a Grundfos brand circulator type AlphaPro 25-40, the consumption always optimized will vary from 6 to 25 watts maximum,

for information, this device when it consumes 25 watts has a yield of 32% at the best of its operating curve, ie between 1,2 and 1,6 m3 / h for about 0,2 bar of pressure
8 watts useful for the movement of water and 17 watts dissipated in calories

when it consumes 6 watt (at idle), it has an efficiency of 22%
or 1,32 watt useful, and 4,68 watts in heat
(for 0,6 m3 / h at 0,08 bar)

installed on a 20 kw boiler, 25 w represents 1 / 800th
6w represents 1/3333

bolt

These performance values ​​are certainly still shabby, but they are higher than those of my Saunier Duval boiler circulator.
I remind you that I measured a consumption of more than 70 watts!

I quite adhere to the metaphor of the 403 diesel. Yes, we are very tricky with very complicated machines for not much ... The goal is simple, to force us to be dependent ...

For the Auer pulsator, it is quite different ... its design is 100% rational with little or no moving parts, it is supposed to be Hyper reliable (unless we integrate the breakdown virus in its electronic circuits). We discussed a lot about this remarkable product in the forum.

[searcher]

Hello everyone .... a doubt settles in me by reading your reactions ...

I have a Fuel De Dietrich boiler + hot water tank of the same brand. All equipped with original sanitary water priority and a room thermostat.

When I got to the house that we recently owned, I noticed that:
- the hot water priority works well, i.e. it interrupts the heating circulator and switches on the sanitary one
- except during a health request this heating circulator runs continuously.

This strongly displeases me for several reasons:
- the price
- noise ... water circulates all the time ...
- uselessness (which I begin to doubt)

So I mounted, in series with the circulator, a temperature probe on the heating outlet pipe of my boiler. This only allows the pump to start from 50 ° on the pipe ...

In operation this gives:
- my room thermostat makes a request to the boiler
- the burner starts
- the outlet pipe heats up
- when it reaches 50 ° the circulator starts

- when the room thermostat stops its request, it stops the burner
- the circulator continues to ... circulate
- when the t ° is <50 ° ... it stops

Is this a safe way to regulate the function of the circulator or am I burying my boiler ???

Thank you for your opinions !

[PITMIX]

Hello
It is the user of the 403 !!!
Finally it is a 403 2007 model all the same. Its circulator operates as long as the house thermostat is in demand. The burner does the rest of the work to maintain a heating flow temperature at around 40 ° C.

[the middle]

Hi researcher
I find your idea good.
I have the same problem as you, I think I will do the same thing.

[swift2540]

I have a Fuel De Dietrich boiler + hot water tank of the same brand. All equipped with original sanitary water priority and a room thermostat.
So I mounted, in series with the circulator, a temperature probe on the heating outlet pipe of my boiler. This only allows the pump to start from 50 ° on the pipe ...
Is this a safe way to regulate the function of the circulator or am I burying my boiler ???

This is a good way, because a cast iron boiler, so you have a "buffer mass". Now the probe must be reactive, ie placed near the boiler outlet.

For those who have no regul at all, there is the PS005.

http://tech6.ccs.be/cmmy_tempolec/rootonline/file_upload/ps005_FR.pdf

We can do a lot of things with this little thing. Price: around 150 € HT
@+

[I Citro]

...
- except during a health request this heating circulator runs continuously.
...
So I mounted, in series with the circulator, a temperature probe on the heating outlet pipe of my boiler. This only allows the pump to start from 50 ° on the pipe ...

In operation this gives:
- my room thermostat makes a request to the boiler
- the burner starts
- the outlet pipe heats up
- when it reaches 50 ° the circulator starts

- when the room thermostat stops its request, it stops the burner
- the circulator continues to ... circulate
- when the t ° is <50 ° ... it stops

Is this a safe way to regulate the function of the circulator or am I burying my boiler ???

Without being an expert, it seems to me that your solution is excellent, I have already explained that on my Saunier duval wall-mounted gas boiler, I broached the terminal block to couple the circulator with the operation of the burner in order to avoid the circulator from run continuously ...
If in theory, this decreases the electrical consumption, it also causes hot spots and condensation phenomena on the heating body likely to prematurely oxidize my boiler ... The assembly that you have carried out is therefore a good compromise since it avoids thermal shocks and their consequences, which is all the more strategic with cast iron ...

[jonule]

Hi everybody,

at home, the thermostat's ambient T ° C regulation acts on a 4-way mixing valve: 2 circuit, a "bypass" output / boiler input, and one which is the return / return loop of the radiators. the valve takes care of mixing the hot circuit of the boiler and that of the radiators.

the electric circulator operates all the time, as soon as the boiler is powered up via the contactor / fuse.

as soon as the boiler thermostat (fuel, which produces hot water) drops below the setpoint (set to the lowest possible, 60 ° C), the fuel burner starts.

I wanted to know if the fact of feeding the circulator on probe was interesting in my case and would improve the operation?
is it a beast conventional probe / wire thermostat to place? or exactly ? you have to make a T to place a thermowell at the radiator hot water outlet?

please