Lenovo Neptune DWC RM100 - Page 17

CDU Operating & Maintenance Guide Page 17
Neptune DWC RM100 in-rack Coolant Distribution Unit
Configuration – Temperature Control
ID
Title
Description
Default
Range
Unit
P301
Temperature Setpoint
Set required Secondary temperature setpoint
18.0
10.0 to
55.0
°C
P302
Control Mode
Select from Fixed Setpoint or Fixed Setpoint
with Dewpoint Override
FSDO
FS, FSDO
-
P303
Dewpoint Offset
Minimum offset of setpoint from dewpoint
temp.
3.0
1.0 to 5.0
°C
P304
Ambient Offset
Minimum offset of setpoint from ambient temp.
3.0
-10 to 10
°C
P305
Sec. Low Temp Diff.
Low temp alarm offset below setpoint
2.0
1.0 to 10.0
°C
P306
Sec. High Temp Diff
High temp alarm offset above setpoint
2.0
1.0 to 10.0
°C
P307
Sec. Temp Reset Hysteresis
Low/High temp. alarm reset point
1.0
0.5 to 5.0
°C
P308
Sec. High Temp Setpoint DW
High temp alarm offset above setpoint when
dewpoint or ambient tracking
20.0
15.0 to
25.0
°C
P309
PID – Control Period
Scan period for control valve positioning
1
1 to 30
secs
P310
PID – Proportional Band
Proportional band
12.0
1.0 to 25.0
°C
P311
PID – Integral Reset
Integral reset time
18
0 to 999
secs
P312
PID – Derivative
Derivative reset time
5
0 to 999
secs
P313
Demand/Actual Error
Control valve demand to feedback error for
alarm
10
0 to 50
%
P314
Valve Check Period
Scan period for control valve position
monitoring
15
1 to 120
mins
P315
Valve Runtime
Control valve motor run time for control loop
40
10 to 180
secs
P316
Max Cooling Mode Temp
Setpoint
The temperature setpoint used when operating
in Max Cooling Mode
18.0
10.0 to
55.0
°C
Configuration – Primary
ID
Title
Description
Default
Range
Unit
P401
Pri. Flow Delay
Time delay prior to low flow alarm
15
1 to 120
mins
P402
Pri. Low Temp Setpoint
Low temp alarm threshold
4
2 to 40
°C
P403
Pri. High Temp Setpoint
High temp alarm threshold
11
6 to 60
°C
P404
Pri. Temp Reset Hysteresis
Low/High alarm reset from threshold
1
0.5 to 5.0
°C
Configuration – Filter
ID
Title
Description
Default
Range
Unit
P504
Sec. Filter Dirty Setpoint
Differential pressure alarm threshold for filter
dirty
0.2
0.2 to 1.0
Bar
P505
Sec. Filter Dirty Hysteresis
Alarm reset from threshold
0.1
0.1 to 0.5
Bar
P506
Sec. Filter Dirty Delay Period
Time delay prior to alarm
60
5 to 7200
secs
Configuration – Leak Detection
ID
Title
Description
Default
Range
Unit
P601
Leak Detection Operation -
Internal
Alarm only, or shutdown & alarm
Alarm
Alarm or
Alarm+S/D
-
P602
Internal Threshold
Set sensitivity of leak tape
50
1 to 85
kohms
P603
Internal Delay Period
Time delay prior to alarm
30
5 to 60
secs
P604
Leak Detection Operation –
Primary External
Alarm only, or shutdown & alarm
Alarm
Alarm or
Alarm+S/D
-
P607
Leak Detection Operation –
Secondary External
Alarm only, or shutdown & alarm
Alarm
Alarm or
Alarm+S/D
-
Configuration – Sensors
ID
Title
Description
Default
Range
Unit
P701
Secondary T2 Temperature
Differential
Alarm threshold T2a/b/c temperature differential
1
0.1 to 10
°C
P702
Secondary T2 Period
Time delay before T2a/b/c differential alarm
30
0 to 120
secs
P703
PS1 Scaling
Set measurement range. 0 = 0 to 30bar, 1 = 0
to 15bar, 2 = -1 to 8 bar.
2
0 to 2
-