Dettson EVO Installation And Owner's Manual page 76

3. Installation method
Model B
1 Indoor unit
Notch the part for the wiring to pass through with nippers, etc.
Connect the terminals on the wired controller (HA ,HB), and the terminals
of the indoor unit (HA ,HB). (HA and HB do not have polarity.)
NOTE:
DO NOT allow water to enter the wired control.
Use the trap and putty to seal the wires.
Connecting wires must be xed reliably and cannot be
pulled.
For some units, the wired controller connects to the unit HA and HB ports
through the HA and HB ports. There is no polarity between HA and HB.
See Fig. 3-9
9
Wired Controller
Indoor Unit
HA HB
Fig.3-9