Version no. Description
1.1.0.1 The Unload Assist function for SAB193-355 is now implemented for
SAB120-151 too. This function helps separating capacity and Vi slide when re-
ducing capacity from 100%.
For SAB 120, 151, 193, 233, 283 and 355 the oil logic has been extended with
a new shutdown "Critical low oil circuit". This function was already implemen-
ted for SAB 157 HR.
For SAB 120, 151, 157 HR, 193, 233, 283, and 355 with VSD, the minimum
capacity slide position Manual zero is now automatically configured to the cor-
rect value, depending on minimum motor speed.
For SAB 120, 151, 157 HR, 193, 233, 283, and 355 the oil pump logic is ex-
tended with an "oil pump safety" alarm and shutdown. It is supervised that
the oil pump, when running, gives an excess oil pressure.
For reciprocating compressors types SMC/HPC/TSMC 100, an extra Oil pres-
sure monitoring is introduced. This oil pressure monitoring checks that there is
a minimum oil pressure a short time after compressor start, i.e. it monitors
that the oil pump is working.
For HPO and HPC heat pumps (R717) the default oil temperature set points
are raised. The values are now, Set point 1: (oil cooling/normal) 65°C and Set
point 2: (oil heating) 55°C.
The Chiller function for DX evaporator expansion valve regulation is now re-
leased.
A functionality for using an external EX-approved keyboard, using a Modbus
connection, has been introduced.
By configuring Danbuss to No, it is now possible to disable some Danbuss
master functions. These functions must be switched off in order to comply
with the RCM controller used on some old marine installations.
When using the e-mail user event function it is now possible to attach a CSV
file which contains a log of actual Unisab III operating data to the dispatched
alarm or shutdown e-mail. The CSV file data can be displayed as a graphical
view in the new Unisab III iPhone App.
For SAB 120, 151, 157 HR, 193, 233, 283 and 355 with oil pump, a problem
has been corrected. If the Oil log alarm timer was set to zero, the oil pump
would run forever. Now the oil pump does not start if the timer is set to zero.
For old Sabroe SAB 163 and 202 screw compressors with variable VI and VSD,
a problem with the Vi slide positioning has been corrected. The problem arose
if the compressor started with high suction pressure, so the capacity could
reach 100% with a Vi position at 0%. In such cases the Vi slide would be fixed
in 0% until Unisab would leave Vi mode, i.e. the capacity slide would have to
decrease to a capacity below 98% before the Vi slide was moved.
Troubleshooting
Engineering manual - Unisab III 1.10
001930 en 2014.09
307/319
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