Toshiba vlp technology P9 ASD Installation & Operation Manual page 184

F480
VLP External Device Delay Timer
Virtual Linear Pump External Device Delay Timer
During a properly configured VLP operation, this parameter establishes the
time that the VLP operating level must remain within the
or the VLP Minimum Zone
auxiliary pump.
See Figures 31 and 32 for more information on the
VLP Minimum Zone.
Increasing Load
If the VLP operating level of the Lead Pump is within the
Zone, and the External Device Delay Timer times out, OUT1 will change
states and activate an auxiliary pump (Lag1).
Should the VLP operating level return to the
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 VLP Minimum
times out while OUT2 is activated, OUT2 will change states and deactivate the
second auxiliary pump (Lag2).
Should the system return to the
the External Device Delay Timer, OUT1 will change states and deactivate the
auxiliary pump (Lag1).
Note: Set the Sleep Timer Delay (F383) to two (2) times the VLP
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
176
to activate/deactivate the Sleep Timer (F382) or an
VLP Maximum Zone
VLP Maximum Zone
Zone, and the External Device Delay Timer
VLP Minimum Zone for a duration in excess of
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 — F480
Parameter Type — Numerical
Factory Default — 5
Changeable During Run — Yes
VLP Maximum Zone
Minimum — 0.1
Maximum — 6553.5
and
Units — Seconds
VLP Maximum
for a
Note:
OR
Sleep if
enabled
P9 ASD Installation and Operation Manual
F480
The number of pumps used
may be increased by using
the optional expansion
board (Primary pump plus
auxiliary pumps).