Johnson Controls SABROE UniSAB III Engineering Manual page 322

Version no.
1.0.7.0 In the Setup/Session/User interface picture the parameter Rem. Man. Allowed will now
be set to No as default.
The maximum setting for Level control regulator, proportional band (PB) is increased
from 50% to 200%.
For SABCube the incorrect text "Drive link error" was displayed when the rpm limiter
was active. This has been corrected in the text files.
1.0.8.0 For RecipRota, i.e. reciprocating compressors mounted with frequency drive, a new
and softer type of coupling is introduced. This soft coupling type requires that the com-
pressor is unloaded in a symmetrical way. This restriction limits the number of unload-
ing steps. As a consequence a new unloading function with fewer unloading steps has
been implemented in UniSAB III. See 3.4.6 Rota (VSD).
For HPO high-pressure reciprocating compressors the oil pressure transmitter can
now be configured to 25 bar or 59 bar. From 2011 HPO will be delivered with a 59 bar
oil pressure transmitter.
It is now possible to delay the PMS Start request output signal between 0-15 minutes -
after compressor stop. (May be used for pump after-run). The PMS Start request feed-
back timer can now be adjusted up to 60 minutes. It is now possible to set the PMS
Start feedback signal to be a fixed signal (May be used for pump after-run). If the Start
request output signal is ON and the PMS feedback gets off (after having been ON) a
PMS error shutdown is given.
The Korean language can now be chosen.
Software version and serial number is now saved in each configuration .xml file.
When the Recip Rota "Step" function was chosen the Discharge temperature limiter for
reciprocating compressors did not work correctly. The Total unload timer would some-
times fail and the alarm did not reset automatically. This has now been corrected.
The measured value for Motor Power is now, together with Motor current, displayed in
the shutdown picture Compressor Motor overload.
The following Multisab situation for screw rotatune compressors has now been cor-
rected. The system would sometimes get stuck in a situation where compressor 1 was
running 100% with compressor 2 and 3 both running at minimum load. They (compres-
sor 2 or 3) did not ramp up when capacity was needed. The start delay timer would
continue to start and reset. The system could be brought out of this Multisab deadlock
situation by switching one of the compressors into manual.
For a reciprocating compressor running at 100% due to the Capacity down blocked sig-
nal set high but with no capacity need, it is observed that the timer Delay before start
was frozen at 9 seconds in the Info bar. This has now been corrected.
Description
Engineering manual - UniSAB III 1.10.8
322/346
Troubleshooting
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