This timer starts if the difference in pressure between oil pressure and discharge pressure ex-
ceeds 2.0 bar.
A shutdown is issued if the timer runs out. See subsection 2.2.33. Low oil circuit pressure
shutdown for more details about this shutdown.
39. SSSTV Delay (suction strainer stop throttle valve)
For SABflex and SABCube compressors only.
At normal stop (to avoid back-spin) the SSSTV valve is closed for the time stated in the timer
SSSTV delay before the compressor is stopped. The default setting is 40 seconds but it is ad-
justable between 20 and 60 seconds.
Note: The SSSTV timer starts counting after the stop timer has run out. This means that the
compressor will not stop immediately, even though the stop key is pressed or the instant stop
digital input is removed.
40. Max. start-up time
For SABflex and SABCube compressors only.
During start-up the speed for a SAB 109-159 may be limited to 1,000 [rpm], if the internal
suction pressure is too high or the oil pressure is too low. The start-up limiter will only be ac-
tive at compressor start-up and it can maximum be active for the time set in timer “Max.
start-up time”.
If the start-up limiter is still active when the “Max. start-up time” timer runs out, a shutdown
is given and the compressor is stopped.
41. Oil return open
For chiller use only.
This timer controls the open time for the oil return valve draining the oil separator.
42. Oil return close
For chiller use only.
This timer controls the closed time for the oil return valve draining the oil separator.
43. By-pass start
For chiller use only.
This timer controls that, at compressor start-up, a start unload valve opens for the set time.
44. Flow evaporator
For chiller use only.
After the float switch has become low, this timer delays the shutdown No evaporator flow.
45. Flow condenser
For chiller use only.
After the float switch has become low, this timer delays the shutdown No condenser flow.
46. Oil return evaporator
For chiller use only.
Set-up
Engineering manual - Unisab III 1.10
001930 en 2014.09
221/319
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