Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
337/346
Version no.
Description
1.1.0.8
Recips
The default setting for the oil cooling and water cooling after run timer,
Oil cool on
, has
been raised to 600 seconds.
Recips
The discharge superheat limits for low shutdown and low alarm have been raised.
Recips
For SMC/TSMC/CMO/TCMO compressors, the max. limits for discharge pressure high
shutdown and high alarm have been raised, in order to operate at a higher discharge
set point.
Screws and recips
Speed default settings for screw and reciprocating compressors have been updated.
Suction pressure limiter neutral zone minimum value
For screws with or without VSD and recips with VSD, the internally calculated neutral
zone for the suction pressure limiter had a minimum value of 1°C. For sites with a nar-
row regulation zone, this could be a problem. The neutral zone minimum has therefore
been lowered to 0.4°C.
DX control, regulator output reset
The regulator does not reset the output signal when the compressor stops or starts.
The valve start position parameter is now used as the basis for the regulator. This
wasn't the case before, which caused the regulator output to "leap" from the start posi-
tion when the regulator took over. We now get a soft slope from the valve start position
when the regulator starts, eliminating the need for a delay between start valve position
and regulator starting.
Service module for screw compressors
For screw compressor types, which support automatic service, the C/D service interval
is now set to between 20,000 and 60,000 hours.
Service module for SMC Mk 5
For SMC Mk 5/Mk 4 LL, the B Service has been replaced with an A service.
Service module for HPX
For HPX reciprocating compressors, the time interval between services has been
increased.
AUX Output
Additional options have been added to the ”AUX” output function:
•
Max cap pos.
•
Max slide
•
At bal. cap.
Refrigerant R600
The R600 refrigerant has been added to the refrigerant tables.
Screws - Forced speed function
Forced speed was not active when DI "normal stop" was deactivated. This has now
been corrected.
Summary of Contents for SABROE Unisab III Control
Page 1: ...UniSAB III control Version 1 10 8 Engineering manual EN...
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