RTHD and RTAC - Trane
RTHD and RTAC - Trane
RTHD and RTAC - Trane
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Starter<br />
Starting Wye Delta With Contactor Integrity Test<br />
Confirm No Transition Complete Signal<br />
(Transition Complete Input Shorted)<br />
Energize Start <strong>and</strong><br />
Stop Relays<br />
Confirm No Compressor Currents<br />
(Starter Fault Type I )<br />
De-Energize Start <strong>and</strong><br />
Stop Relays<br />
Energize <strong>and</strong> Hold<br />
Shorting Relay<br />
Confirm No Compressor Currents<br />
(Starter Fault Type II )<br />
Starting Compressor<br />
Starter Contactor Integrity Test<br />
Arm/Run Comm<strong>and</strong> to Starter Module<br />
Figure 14.Sequence of Operation Y-delta Start<br />
Energize Stop <strong>and</strong> Start<br />
Relays<br />
Starting<br />
Compressor<br />
Starting Compressor<br />
in Wye<br />
Max Accel Timer<br />
(6 to 64 Seconds)<br />
Confirm Proper Compressor Rotation<br />
within 0.3 seconds (Phase Reversal)<br />
<strong>and</strong> > 5% RLA (Phase Loss)<br />
Confirm > 10% RLA Compressor<br />
Currents within 1.6 se conds<br />
(Starter Fault Type III )<br />
When Currents Drop Below 85% RLA +1.5<br />
Seconds, Energize Transition Relay<br />
De-Energize Shorting<br />
Relay<br />
Energize Run<br />
Contactor<br />
Confirm Transition Complete<br />
Input within 2.5 seconds<br />
(Starter Did Not Transition)<br />
De-Energize Transition<br />
Relay<br />
Starting Compressor<br />
Transition Starter to Delta<br />
Compressor<br />
Running<br />
RLC-SVD05A-EN 35
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