Trane CenTraVac Duplex CDHE, Operation & Maintenance Manual

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CDHF-SVU01C-EN
70
Interval Minimum Maximum Units Actual Design
A. (Test for transition complete
input open)
160 to 240 milliseconds
B. (Just delay time) 20 milliseconds
C. (Close 1M (2K1) Contactor and test
for no current.) (Starter integrity test)
500 milliseconds
D. (Hold 1M (2K1) Contactor and test
for no current.) (Starter integrity test)
1 second
E. (Open 1M (2K1) Delay time 200 milliseconds
F. (Close Shorting Contactor (2K3) and
and test for no current, then wait for
Start command.) (Starter integrity test)
100 milliseconds 1 second (Minimum)
G. (Close 1M (2K1 and 2K11) 2.0 second 2 second
H. (Wait 1.5 seconds after phase currents
drop to 85 percent)
1 2 second 1.5 second
J. (Begin Transition sequence) 85 100 milliseconds 100 milliseconds
K. (Open S (Shorting) Contactor) 250 300 milliseconds 260 milliseconds
L. (Close 2M (2K2) Contactor 140 milliseconds
M. (Wait to look for Transition complete) milliseconds 2.32 to 2.38 second
N. (Filtering time on Transition
complete input)
milliseconds 160 to 240 milliseconds
Figure 24. Test and start timing sequence
Timing requirements to operate the
“Stop”, “Start”, “Short”,
“Transition”, and “Run” contact
closure outputs are shown below.
Prior to closing the “Short” contact,
the transition complete input shall be
verified to be open, otherwise an
MMR diagnostic shall be generated.
Control Sequence
of Operation
Steps A to F: Starter Integrity Test
Steps G to N: Starter Timing