Trane YSC072F - Pre-Start; Compressor Crankcase Heaters (Optional); ReliaTel Controls

Pre-Start
RT-SVX21N-EN 45
Electromechanical ControlsTest
Procedure
See unit schematic for correct wire numbers.
Fan Test and Minimum Ventilation
Connect red thermostat wire (R) to black thermostat wire
(G).
Economizer Cooling
Connect a jumper wire across OTS on Economizer Control
(ECA).
Connect red thermostat (R) wire to yellow thermostat wire
(Y1).
Cool 1
Connect red thermostat wire (R) to yellow thermostat wire
(Y1).
Cool 2
Connect red thermostat wire (R) to yellow thermostat wire
(Y2).
Heat 1
Connect red thermostat wire (R) to brown thermostat wire
(W1).
Heat 2
Connect red thermostat wire (R) to brown thermostat wire
(W2).