Carel mRack, Instructions Manual

Page: 29 / 40

µRack
Cod. CAREL +03P220431 rel. 0.0 del 08/09/05 - preliminary version 25
Parameter Type Pos. Display Description UOM Range Default Notes
Min. time between
stops of different
compressors : R/W C C04 Minimum time between two stop calls for compressors. s 0 to 999 20
Min. time between
starts of same
compressor :
R/W C C05 Minimum time between two effective starts of the same compressor s 0 to 999 360
Time between
compressor OFF call
with prevent active
R/W C C06 Time between compressor stop call with high pressure prevention active. s 0 to 999 30
Only if prevent
active
Compressor operating
hour threshold for
maintenance alarm
R/W I C07
Compressor operating hour threshold for maintenance alarm. If set to
0, no maintenance alarms.
h X 10 0 to 999 200
This means 2000
hours
Compressor 1 operating
hours
R I C08 Display compressor 1 operating hours h X 10 0 to 999 0
RESET Compressor 1
operating hours
R/W I C09
Reset comp.1 operating hours
0) NO RESET
1) RESET
0 / 1 0
Compressor 2 operating
hours
R I C10 Display compressor 2 operating hours h X 10 0 to 999 0
RESET Compressor 2
operating hours
R/W I C11
Reset comp.2 operating hours
0) NO RESET
1) RESET
0 / 1 0
Compressor 3 operating
hours
R I C12 Display compressor 3 operating hours h X 10 0 to 999 0
RESET Compressor 3
operating hours
R/W I C13
Reset comp.3 operating hours
0) NO RESET
1) RESET
0 / 1 0
Compressor 4 operating
hours
R I C14 Display compressor 4 operating hours h X 10 0 to 999 0
RESET Compressor 4
operating hours
R/W I C15
Reset comp.4 operating hours
0) NO RESET
1) RESET
0 / 1 0
Compressor set point 2:
Offset
R/W I C16
Auxiliary compressor set point offset. Used when changing the set
point from digital input.
bar
-99.9 to
99.9
0
Control menu
Compressor set point
circuit 1
R/W U r01 Compressor set point first circuit bar / °C
min to max
comp. set
1.0
Compressor differential
circuit 1
R/W U r02 compressor differential first circuit bar /°C 0 to 20.0 0.5
Compressor set point
circuit 2
R/W U r03 Compressor set point second circuit bar / °C
min to max
comp. set
1.0
For two circuits
only
Compressor differential
circuit 2
R/W U r04 compressor differential second circuit bar /°C 0 to 20.0 0.5
For two circuits
only
Comp. rotation R/W C r05 Type of compressor rotation
0 = LIFO
1 = FIFO
2 = Time 1
Compressor control: R/W C r06
Type of compressor control:
0) Proportional,
1) Dead band.
2) Dead band with time
0 / 2 1
Min call time start in
dead band
R/W I r07 Set minimum call time for compressor starts in dead band s 0 to 999 20
Only if dead band
control is enabled
Max call time start in
dead band
R/W I r08 Set maximum call time for compressor starts in dead band s 0 to 999 60
Only if dead band
control is enabled
Min call time stop in
dead band
R/W I r09 Set minimum call time for compressor stops in dead band s 0 to 999 10
Only if dead band
control is enabled
Max call time stop in
dead band
R/W I r10 Set maximum call time for compressor stops in dead band s 0 to 999 60
Only if dead band
control is enabled
Dead band diff.
pressure in which the
time varies
R/W I r11
Pressure differential in which the compressor start/stop time is
proportional to the suction pressure
bar 0 to 20.0 0.5
Only if dead band
control is enabled
Min compressor set
point
R/W C r12 Set the lower limit of the compressor set point circuit 1 bar 0 to r14 0.1