Page 28
13-17-625 v00
Pressure, the next available compressor is started immediately, followed by additional
compressors in a defined sequence if the system pressure remains low.
Variable Speed Master
– Fixed Speed Slaves
: The line pressure is controlled precisely between
the minimum and maximum line pressure by the speed-controlled compressor, within the available
speed range. If the limits of the pressure band have been reached, then compressors are switched
on or off as described above.
Variable Speed Master
– Variable Speed Slaves
: The speed-controlled compressors run at
approximately the same speed and load if they are approximately the same size. After a
compressor is restarted manually (e.g., after Service), the speed may not be synchronous for a
brief period, until the compressor reaches its minimum or maximum speed limit for the first time.
Defining a new sequence based on Hours Run (BLS)
When the Transfer Interval has expired,
the master defines a new sequence based on the Hours Run (BLS) of the compressors. The
compressor with the least Hours Run (BLS) is placed first in the sequence, etc. The next section
for sequencing diagnostics shows how to change the BLS Run Hours. On variable speed
compressors with fixed speed slaves, the variable speed compressor will always remain in the
first place of the sequence, while the position of the slaves is changed periodically.
To use the Governor™ controller with a Connect 12 system, the sequencing mode will need to be
configured as a slave machine with the master enable turned off. All machines are configured this
way and the Connect 12 acts as the Master Control. To use the Governor with a Connect 4 system,
an iPCB module is required.
4.6 Delcos Sequencing Diagnostics
The sequencing diagnostics page can be found by going to menu, then selecting Diagnostics, then
Sequencing as shown in the Figure 26
below.
Summary of Contents for Governor
Page 42: ...Page 42 13 17 625 v00 NOTES...
Page 43: ...Page 43 13 17 625 v00 NOTES...
