Unidentified part on amptec electric heating

[elaar]

Hi all,

I have an amptec electric heating/combi system in my flat and am trying to understand the setup so that I can diagnose a few of the problems. I am an electronic engineer and not a plumber/boiler engineer thus I am struggling slightly

I am trying to work out what 1 particular component is, it is fairly small, encased in plastic, connected inline to the pipework that is the cold feed that goes into the amptec heating enclosure. The pump is located just before it. It has 2 wires going into it, 1 that comes from the control board in the circuit breaker box, the other is a tiny wire that goes to the high power amptec switch board containing the tranny that turns the element on. I was guessing that it was a thermistor of some sort? with the smaller wire giving the reading??

Any help on what it is and what the wires provide will be gratefully received!

Cheers,
Andy

 

[JohnD]

//www.diynot.com/forums/viewtopic.php?t=99672

 

[elaar]

I'll try to post a picture tonight if I can get my phone/camera working properly.

Oh btw, it's made by "Crydom"

 

[Gasguru]

Crydom make solid state relays.

 

[elaar]

Correct they do, infact they seem to make nothing but solid state relays, I've still got no idea what it is though

 

[gas4you]

Could this be a flow switch to stop the heater element coming on if the pump is not circulating or the system is empty

 

[elaar]

That sounds plausible, whatever it is, it is only connected when the boiler control board switches on the pump (piggy backed onto that relay). At last here is the picture:

Assuming anyone can identify it from the picture, does anyone know what the 2 leads coming from it do? (one is a live mains wire).

Many thanks,
Andy

 

[twgas]

looks like a flow switch to me, the two wires will send a message to the PCB saying the water is flowing through it.