Mitsubishi Ecodan heat pump (FTC6) - timing DHW by dry contact

Thanks for the tag ​@Ben_OVO !

Hi ​@Ronen.B 

I don’t have experience with 131 mode or dry contacts, I use the default timer in the control panel.

But from my quick research I think 131 mode can be used to define what happens when a dry contact closes, for example Trigger DHW.  That being said 131 mode is usually for installers to test the system out.

I also don’t know if the third-party controller could do more than ON/OFF and the actual water temp would still be set in the ecodan control unit.  My experience with third party thermostats is that the only function on ON/OFF.

You’d need to get in touch with an actual professional on this to give you the best answer.  Here is a link to the installer’s guide for the ecodan (could only find the FTC5 one) - Ecodan FTC5 - PAC-IF062B-E, PAC-SIF051B-E Installation Manual & Instruction Book (BH79D499H03) - Document Library - Mitsubishi Electric

I will stress again to get a certified installer out if you are going to go down the route of putting in a third-party product.

Best of Luck!