Twin-Star International 33EB304GRS Manual Del Usuario página 12

If the external thermostat won't be used, then wire T1 and wire T2 should be
bound together using a wire nut.
!
When the wiring is complete, a thorough "testing cycle" must
be performed to check the operation of the unit PRIOR to the
wall / area being closed up, tiled, and/or bricked.
Wire Connection Diagram: Figure 12
E-12
!