172
P9 ASD Installation and Operation Manual
(Virtual Linear Pump) External Device Delay Timer
Virtual Linear Pump
External Device Delay Timer
During a properly configured
Virtual Linear Pump
operation, this parameter
establishes the time that the
Virtual Linear Pump
operating level must remain
within the
threshold to activate/deactivate the
Sleep Timer
) or an
auxiliary pump.
See
and
for additional information on the
threshold and the
threshold.
Increasing Load
If the
Virtual Linear Pump
operating level of the Lead Pump is within the
threshold, and the
External Device Delay
Timer
times out,
OUT1
will change states and activate an auxiliary pump
(Lag1).
Should the
Virtual Linear Pump
threshold for a duration in excess of the
External Device
Delay Timer
,
OUT2
will change states and activate the second auxiliary pump
(Lag2).
Decreasing Load
If operating in the
threshold, and the
External
Device Delay Timer
times out while
OUT2
is activated,
OUT2
will change
states and deactivate the second auxiliary pump (Lag2).
Should the system return to the
threshold for a
duration in excess of the
External Device Delay Timer
,
OUT1
will change
states and deactivate the auxiliary pump (Lag1).
Note:
Set the
Sleep Timer
Delay
) to two (2) times the
Virtual
Linear Pump External Device Delay Timer
(if using the Sleep
Timer function) as not to place the primary ASD in the sleep
mode with Lag1 and/or Lag2 running.
Note:
Set
OUT1
and
OUT2
to
External Device 1
and
2
, respectively,
as required.
Direct Access Number — F480
Parameter Type —
Numerical
Factory Default —
5
Changeable During Run —
Yes
Minimum — 0.1
Maximum — 6553.5
Units — Seconds
xternal Device
xternal
evice 2
Auxiliary Pump Activation Sequence
PUMP ID
IF @
AND
THEN
OR
Lead Pump
Max Zone
Counter Time = 0
Activate
OUT1
Lag1 Pump
Max Zone
Counter Time = 0
Activate
OUT2
Lag2 Pump
Max Zone
Counter Time = 0
Run
Continuous
Lag2 Pump
Min Zone
Counter Time = 0
Deactivate
OUT2
Lag1 Pump
Min Zone
Counter Time = 0
Deactivate
OUT1
Lead Pump
Min Zone
Counter Time = 0
—
Sleep if
enabled
Note:
The number of pumps used
may be increased by using
the optional expansion
board (Primary pump plus
auxiliary pumps).
Summary of Contents for P9
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