Unit installation

CDU Installation Guide Page 29
Cooling Distribution Unit
OPERATION (continued)
Screen
/ Level
Title
Options & (Info)
Service (screen 4)
4-1
Force pump c/o
(change pump from 1 to 2 or 2 back to 1 – OK to initialise)
4-2
Force valve c/o
(change valve from 1 to 2 or 2 back to 1 – OK to initialise)
4-3
Overrides
(no automatic function - for full manual control of all functions)
4-3-1
Auto/man mode
Automatic / Manual (set unit to manual or automatic operation)
4-3-2
Digital outputs
0000000000 (manually set digital output status – see Section 5.8)
4-3-3
AO1 – inverter
0 to 100 % (manually set pump speed)
4-3-4
AO2 – valve 1
0 to 100 % (manually set valve 1 position)
4-3-5
AO3 – valve 2
0 to 100 % (manually set valve 2 position)
4-4
Manual Control
(for manual control of some functions while still running in automatic mode)
4-4-1
Secondary
pumps
4-4-1-1 P1 inverter (set pump speed)
4-4-1-2 P2 inverter (set pump speed)
4-4-1-3 P1 DOL (switch to Manual for ON)
4-4-1-4 P2 DOL (switch to Manual for ON)
4-4-2
Heat exchanger
4-4-2-1 Valve 1 (set valve position)
4-4-2-2 Valve 2 (set valve position)
4-4-3
Fill pump P3
Automatic/Manual (switch to Manual for ON)
4-4-4
Warning fault
Automatic/Manual (simulate fault on customer warning relay)
4-4-5
Alarm fault
Automatic/Manual (simulate fault on customer alarm relay)
4-5
Suppress Events
(resets alarm delay timer (scr.6-7) to stop nuisance alarms breaking through
screens during manual overrides – OK to initialise)
4-6
Reset Run Hours
4-6-1
Pump P1
(set pump 1 run hours to zero – OK to initialise)
4-6-2
Pump P2
(set pump 2 run hours to zero – OK to initialise)
4-6-3
Valve V1
(set valve 1 run hours to zero – OK to initialise)
4-6-4
Valve V2
(set valve 2 run hours to zero – OK to initialise)
4-6-5
All
(set all pump & valve run hours to zero – OK to initialise)
4-7
Defer Active Event(s)
4-7-1
Period
Default 24 Hours [adj. 24, 48. 72 hrs] (set alarm defer period)
4-7-2
Initiate
(OK to initialise)
Time control (screen 5)
5-1
Date & time
dd/mm/yy hh:mm:ss (set date & time - 24 hour clock)
5-2
Date format
dd/mm/yy or mm/dd/yy
5-3
Daylight saving
5-3-1
Adjustment
Europe, Manual, No DST or N. America
5-3-2
Manual dates
--/-- --/--
Parameters (screen 6)
SI U N I T S
6-1
Reservoir
6-1-1
Fill pressure
Default 0.5 Bar [adj. 0.5 to 1 bar] (shut off threshold for fill pump)
6-1-2
Fill pump run
Default 3 mins [adj. 1 to 15 mins] (run time for float switch to make or fill
pressure to be achieved, prior to alarm)
6-1-3
Float switch delay
Default 4 secs [adj. 1 to 30 secs] (reservoir float switch de-bounce time)
6-2
Secondary pumps
6-2-1
No of RDHx
Default 1 [adj. 1 to 6]
6-2-2
DP setpoints
(pump differential
pressure set points for
pump speed control
loop)
6-2-2-1 Sys diff 1 RDHx – Default 2.1 Bar [adj. 0.5 to 4 bar]
6-2-2-2 Sys diff 2 RDHx – Default 2.3 Bar [adj. 0.5 to 4 bar]
6-2-2-3 Sys diff 3 RDHx – Default 2.5 Bar [adj. 0.5 to 4 bar]
6-2-2-4 Sys diff 4 RDHx – Default 2.7 Bar [adj. 0.5 to 4 bar]
6-2-2-5 Sys diff 5 RDHx – Default 2.9 Bar [adj. 0.5 to 4 bar]
6-2-2-6 Sys diff 6 RDHx – Default 3.1 Bar [adj. 0.5 to 4 bar]
6-2-3
DP loop refresh
Default 10 [adj. 5 to 120 secs] (scan period for pump speed control loop)
6-2-4
Pump DP hys
Default 0.5 Bar [adj. 0.1 to 3 bar] (threshold for pump low flow alarm)
*** SI UNITS ***