Hi Andy, I am Kelly and wish to at least make an attempt to help you out. I have done quite a bit of research and like you have come up with little nothing positive.
You may have to buy your own 3 phase 24DC controlled contactor and control that with a yet another relay.
At this point you may want to call Tylo direct or email them and explain your needs to see if they can help you.
Page 8 of their installtion manual shows several 3 Phase connections
Tylo contct info:
TYLö AB, Svarvaregatan 6, S-30250 Halmstad, Sweden.
Tel +46 35 10 00 80, Fax +46 35 102580. E-mail: [email protected] Internet: www.tylo.se
Here is the controller you may need with a 5 meter capillary tube. it does not say if it is 3 Phase and it is mecanical.
Seriously I would contact Typo directly via the contact info above and solve your problem quickly.
The link.... for the TS-30-012
I do wish you the best.