etm

They are identical doing the same thing. 

                                 First schematic      Second schematic

Power                             L-N                           Lin-N                       
Output Heating              Y1-N                        L1 out-N                   
Output Cooling              Y2-N                        L2 out-N                   

If you jumper Y1-L4 in the first schematic you will also have LED status indication.

As always, if in doubt consult the manufacturer. 

Elias Manolakos, BSEE, MSEE, P.E.
Control Systems Engineer
Houston, Texas