Johnson Controls SABROE Unisab III Control, Инструкция по эксплуатации

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Engineering manual - UniSAB III 1.10.8
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001930 en 2021.06
Compressor control and surveillance
3.8.7 Configuration
To obtain a correct calculation of the zero point it is important that the compressor type and swept vol-
ume have been entered correctly.
The swept volume of the compressor is determined on the basis of:
• Compressor type
• rpm (50/60 Hz)
• Male/female rotor
On SAB 202, UniSAB III will automatically enter a swept volume value corresponding to the S type with
male rotor and a two-pole 50 Hz motor (1229 m3/h). The correct swept volume must be based on the
number of revolutions of the compressor (50/60 Hz supply) and whether the compressor has male or fe-
male rotor drive:
SAB 202 SM/ 50 Hz, swept volume = 1229 m3/h
SAB 202 SM/ 60 Hz, swept volume = 1475 m3/h
SAB 202 SF/ 50 Hz, swept volume = 1843 m3/h
SAB 202 SF/ 60 Hz, swept volume = 2212 m3/h
SAB 202 LM/ 50 Hz, swept volume = 1590 m3/h
SAB 202 LM/ 60 Hz, swept volume = 1908 m3/h
SAB 202 LF/ 50 Hz, swept volume = 2385 m3/h
SAB 202 LF/ 60 Hz, swept volume = 2862 m3/h
The nominal swept volume at 50 Hz is stated on the compressor name plate.
As already mentioned, there are two configuration points in the picture Setup/Configuration/Compressor
block :
Mechanical zero No [/Yes]
Manual zero 0.0%
Only if the compressor has a built-in spacer block and automatic Vi regulation, should the Mechanical
zero be set to Yes . In all other cases Mechanical zero must be set to No . See subsection 3.8.5 Built-in
spacer block .
To make a manual setting of the zero point, enter a zero point between 0-40% of maximum capacity
slide travel in
Manual zero 0.0%.
See the subsection 3.8.4 Manual setting of new zero point (all screw compressors) .
3.8.8 Zero pos. picture
The current calculated zero point value as well as any manually set zero point value can be read in the
Diagnosis picture: Service/Diagnose/Software/Zero Cap. Position .
The following calculated capacity values can also be read in the Diagnosis picture:
• Relative Cap. Vi capacity calculated relative to Vi slide position
• Relative Cap. MZ capacity calculated relative to manual zero and ViI slide position