Heat pump controller

[aircon50]

Hi all,
I've spent hours looking at these until my eyes are approx 71 x 29mm!
I am looking for a controller for an air to water heat pump (heating only) with two relays, two sensors and can initiate and terminate a defrost cycle by temperature. I don't want to start a discussion over whether AKO is better than Carel, Elliwell etc, etc!
The relays are controlling contactors, so they don't necessarily need to be 16A.
Hoping someone can help.
Graham

[da_fitz_man]

Hi Grahem,

Can i suggest a Carel controller, 'MicroChiller 2 SE'
It can be set up to cater for exactly what your after. i have set one up for a pool heat pump, with a defrost sensor on the external coil with success.

Check out

http://www.carel.com/carelcom/web/eng/catalogo/ricerca_doc.jsp

Hope this helps, i am un familiar with other brands doing something similair.
But i'm sure their are some out their.

[chemi-cool]

Check this one, there is large variety over there:

http://www.dixell.com/1-or-2-circuits-4-steps/