Johnson Controls SABROE Unisab III Control, Engineering Manual

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Engineering manual - UniSAB III 1.10.8
248/346
001930 en 2021.06
Set-up
6.5.13 Timer description - reciprocating compressors
1. Start-start delay
States the number of seconds that must pass before the compressor can be restarted after a start. If the
compressor stops before the timer has reached 0, the timer will block restart.
1. For compressors configured with Rotatune=No, the timer can be set down to 600 seconds
2. For compressors configured with Rotatune=Yes, the timer can be set down to 60 seconds
2. Stop-start delay
States the number of seconds that must pass before the compressor can be restarted after stop. This
function is not used in
Manual mode.
3. Start delay
When UniSAB III is in Automatic or Remote , the compressor start will be delayed for the stated number
of seconds.
4. Stop delay
When UniSAB III is in Automatic or Remote and the compressor is at its lowest capacity stage, the timer
will start counting down and stop the compressor at 0.
5. Suction ramp
This timer indicates how fast the compressor is allowed to lower its suction pressure 1 ° C. The function
is active as long as the compressor is working itself down to its normal working set point. When this has
been reached, the compressor will be regulated according to the set regulating values.
If the value is set at 0, this function will be disabled.
6. Delay up
Indicates the time that passes between the loading of stages at increasing capacity in Automatic or Re-
mote mode.
7. Delay down
Indicates the time that passes between the unloading of stages at decreasing capacity in Automatic or
Remote mode.
8. Take-over max.
Only used in connection with Multisab. See the UniSAB III sequence manual.
9. Take-over delay
Only used in connection with Multisab. See the UniSAB III sequence manual.
10. Intermediate pressure low
During start-up the alarm for low intermediate pressure is delayed for the stated time. No delay during
normal operation.