54
Mask index Display Description Description Default UOM Values
Caf22
Common time Enable common delay time (from one stage to the following) for screw
compressor 1
ENABLE --- DISABLE/ENABLE
Common time/time
between steps
Common delay time (from one stage and the following) for screw
compressor 1
0 s 0…999
From…to… Minimum compressor delay time in order to reach each capacity stage
from previous for screw compressor 1
… s 0…999
Caf23
Intermittent valve time Intermittent on/off time for capacity control valves for screw compressor
1
10 s 0…99
Caf24
Valve conf. Confi guration of the behaviour of the valves during start/stop and
stages for screw compressor 1
… ---
O (ON)
X (OFF)
I (Intermittent)
P (Pulsing)
Caf25
Limit comp.permanence
at min power
Enable time limit at minimum capacity for screw compressor 1
Enable ---
DISABLE
ENABLE
Max.perman.time Max time for compressor operation at minimum capacity for screw
compressor 1
60 s 0…9999
Limitat.on for Time to return to minimum after the compressor was forced to second
stage after staying at minimum for maximum time for screw compressor
1
0 s 0…9999
Caf26
Min.output power Minimum compressor capacity in case of high capacity range (usually
25%), only for continuous compressors
25 % 0…100
Caf27
Compressor start-up
phase duration
Start-up phase time (after electric start-up)
10 s 0…999
Maximun time to reach
-maximum power
Maximum time in order to reach maximum compressor capacity (con-
tinuous capacity control)
120 s 0…999
-minimum power Minimum time in order to reach minimum compressor capacity (con-
tinuous capacity control)
120 s 0…999
Caf28
Intermittent Intermittent on/off time for capacity control valves 10 s 0…99
Pulse period Pulsing period for valves (for continuous compressors) 3 s 1…10
Min.Puls.Incr. Minimum pulse time for increase capacity (valves control) 0,5 s 0.0…9,9
Max.Puls.Incr. Maximum pulse time for increase capacity (valves control) 1.0 s 0.0…9,9
Min.Puls.Decr. Minimum pulse time for decrease capacity (valves control) 0,5 s 0.0…9,9
Max.Puls.Decr. Maximum pulse time for decrease capacity (valves control) 1.0 s 0.0…9,9
Caf29
Valve conf. Confi guration of the behaviour of the valves during start/stop, incr.min%
to 100%, decr.100% to min%, standby, decr.100% to 50%
… ---
O (ON)
X (OFF)
I (Intermittent)
P (Pulsing)
Caf36
Number of valves Number of control capacity valves for screw compressor 2 3 --- 1…4
Stages confi guration Stage confi guration for screw compressor 2 25/50/
75/100
%
100; 50/100; 50/75/100;
25/50/75/100; 33/66/100
…… … ………
Caf90
Diff erent sizes Enable compressors of diff erent sizes (line 1) NO --- NO / YES
Diff erent number of
valves
Enable compressor capacity control (line 1)
NO --- NO/SI
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