Advice on Ultra Quite Contactor - Underfloor Heating

[LucioGodoy]

Hi All;

I have a flat with 6 areas warmed via underfloor heating. Each of the areas are controlled by its own thermostat Microline Ultra-Thin Thermostat with display, and there are 2 models used:

2 x OTN2-1991 with floor sensor (bathroom)

4 x OTN2-1999 with built-in room sensor (other rooms)

Microline Manual Link:

Power is applied on Microline terminals 1 and 2, via the setup explained below.

These 6 individual areas are combined into 3 major areas. These major areas are controlled via its own contactor HAGER ES 200 (25A/230V) controlled by a Drayton Timer.

Because of the "clank" noise when contactors are switched-on/off and the humming noise when on, I decided to replace this mechanical system with a Solid State Contactor (Croydon CRKA2430).

Great!! the clank and humming noise are gone!! However due to the way the Solid State Contactor operates, I noticed that there is a voltage leakage of about 16VAC, enough to mess-up the programming on the Microline Thermostat.

Not sure how to resolve the voltage leak, but my question is: Do you know of any 25A Ultra Quiet contactor, that will not make a huge clank and humming noise pls?

Many thanks

Lucio

 

[Evans Electric]

Can't guarantee it not clanking but you could change the coil to a DC one , that should stop the humming .

  A lot of these electronic solid state   switching devices  don't  have the mechanical 3mm contact separation....tend to leak current... and sometimes just do not mix with other devices. 

 

[Andy™]

http://www.screwfix.com/p/crabtree-45a-1-gang-dp-cooker-switch-with-neon-white/98632

 

[LucioGodoy]

http://www.screwfix.com/p/crabtree-45a-1-gang-dp-cooker-switch-with-neon-white/98632

Andy, not sure that's the right address, thanks

Can't guarantee it not clanking but you could change the coil to a DC one , that should stop the humming .

  A lot of these electronic solid state   switching devices  don't  have the mechanical 3mm contact separation....tend to leak current... and sometimes just do not mix with other devices. 

Ok, thanks

 

[Lurch]

Andy, not sure that's the right address, thanks

Think he's trying to be a comedian.

 

[Andy™]

tried and failed by the looks of it

 

[LucioGodoy]

Is there a way of sound proofing the contactor box?

thanks

 

[Andy™]

you could but be aware that any soundproofing will probably insulate it too which could then lead to other problems

 

[rapparee]

http://plasticservices.com/Techtips/contactors.htm