Trane GAM5B0A18M11EB Installation, Operation And Maintenance Manual page 47

22.2 System Start Up
STEP 1 - Make sure all panels are securely in place
and that all wiring has been properly dressed and
secured.
STEP 2 - Set the system thermostat to OFF.
STEP 3 - Turn on electrical power disconnect(s) to
apply power to the indoor and outdoor units.
STEP 4 - Set the system thermostat to ON.
OFF
ON
OFF
ON
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