Trane RTHA Installation, Operation And Maintenance Manual page 36

RTHD Units with IT Starter
Figure 35. Control power wiring (new wiring bold/highlighted in red) — RTHD - MX2 Starter
NOTE:
1. Connection to start signal is required. If you don't use this contact, you need to place a wire to the start signal.
36
Optional contact.
See note 1.
To Shunt
Trip Coil
RLC-SVN005B-EN