PC-23 SBW Staging Delay
Range:
Function:
15
s
*
[0 -
3000
s]
Immediate staging of a fixed speed pump is not
desirable when a momentary pressure drop in the
system exceeds the staging bandwidth (SBW).
Staging is delayed by the length of time
programmed. If the pressure increases within the
SBW before the timer has elapsed, the timer is
reset.
Illustration 3.64 SBW Staging Delay
PC-24 SBW Destaging Delay
Range:
Function:
15
s
*
[0 -
3000
s]
Immediate destaging of a fixed speed pump is not
desirable when a momentary pressure increases in
the system that exceeds the staging bandwidth
(SBW). Destaging is delayed by the length of time
programmed. If the pressure decreases within the
SBW before the timer has elapsed, the timer is
reset.
Illustration 3.65 SBW Destaging Delay
PC-25 OBW Time
Range:
Function:
10
s
*
[0 -
300 s]
Staging a fixed speed pump creates a momentary
pressure peak in the system, which might exceed
the override bandwidth (OBW). It is not
recommended to destage a pump in response to a
staging pressure peak. The OBW time can be
PC-25 OBW Time
Range:
Function:
programmed to prevent staging until the system
pressure has stabilised and normal control
established. Set the timer to a value that allows the
system to stabilise after staging. The 10 s factory
setting is appropriate in most applications. In highly
dynamic systems, a shorter time may be wanted.
Illustration 3.66 OBW Time
PC-26 Destage At No-Flow
Option:
Function:
This parameter ensures that when a no-flow
situation occurs, the fixed speed pumps are
destaged 1-by-1 until the no-flow signal
disappears. This requires that no-flow detection is
active. See parameter group
AP-2#
.
If
[0] Disabled
is selected, the Pump Controller
does not change the normal behaviour of the
system.
[0]
*
Disabled
[1]
Enabled
PC-27 Stage Function
Option:
Function:
If the stage function is set to
[0] Disabled
,
parameter PC-28 Stage Function Time
is not
activated.
[0]
Disabled
[1]
*
Enabled
Parameter Description
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DET-620D
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