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F931
Virtual Linear Pump External Device Delay Timer
Virtual Linear Pump Run External Devices
During a properly configured Virtual Linear Pump operation, this parameter
establishes the time that the Virtual Linear Pump operating level must remain
within the
Maximum Threshold Zone
activate/deactivate the Sleep Timer (F925) or an auxiliary pump.
See
Figures 29
and
30
for more information on the
and the
Minimum Threshold
Increasing Load
If the Virtual Linear Pump operating level of the Lead Pump is within the
Maximum Threshold
Zone, and the External Device Delay Timer times out,
OUT1 will change states and activate an auxiliary pump (Lag1).
Should the Virtual Linear Pump operating level return to the
Threshold Zone
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
Minimum Threshold
Timer times out while OUT2 is activated, OUT2 will change states and
deactivate the second auxiliary pump (Lag2).
Should the system return to the
excess of the External Device Delay Timer, OUT1 will change states and
deactivate the auxiliary pump (Lag1).
Note:
Set the Sleep Timer Delay (F926) 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.
Auxiliary Pump Activation Sequence
PUMP ID
IF @
Lead Pump
Max Zone
Lag1 Pump
Max Zone
Lag2 Pump
Max Zone
Lag2 Pump
Min Zone
Lag1 Pump
Min Zone
Lead Pump
Min Zone
214
or the
Minimum Threshold Zone
Maximum Threshold Zone
Zone.
Zone, and the External Device Delay
Minimum Threshold Zone
AND
THEN
Activate
Counter Time = 0
OUT1
Activate
Counter Time = 0
OUT2
Run
Counter Time = 0
Continuous
Deactivate
Counter Time = 0
OUT2
Deactivate
Counter Time = 0
OUT1
Counter Time = 0
—
Direct Access Number — F931
Parameter Type — Numerical
Factory Default — 5
Changeable During Run — Yes
Minimum — 0.0
to
Maximum — 6553.5
Units — Seconds
Maximum
for a duration in
Note:
OR
Sleep if
enabled
GX9 ASD Installation and Operation Manual
F931
The number of pumps used
may be increased by using
the optional expansion
board (Primary pump plus
auxiliary pumps).
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