174
P9 ASD Installation and Operation Manual
Low Suction Pressure Delay Timer
Virtual Linear Pump
Low Suction Pressure Delay Timer
This parameter has three functions.
1.
It is used to set the time that the ASD will be allowed to run at the
continuously before the system is turned off.
This condition is used as an indication of loss of feed water or a closed
output valve. See
for additional information on this function.
2.
It is used to set the time that a
Low Suction/No Flow
condition is allowed
to continue before a shut down.
3.
It is used to set the time that must lapse before a system restart is attempted
after a system shut down due to a
Low Suction/No Flow
condition. See
for additional information on this function.
Direct Access Number — F484
Parameter Type —
Numerical
Factory Default —
10
Changeable During Run —
Yes
Minimum — 1
Maximum — 255
Units — Seconds
Sealing Water/Vacuum Prime Enable
Virtual Linear Pump
Sealing Water/Vacuum Prime Enable
This parameter
Enables/Disables
seal water detection.
On larger or older pumps, external sealing water is required at start up. Until
adequately supplied with sealing water, the ASD will not start.
An external sealing water pump is required to supply sealing water and is
enabled via an ASD output contactor set to
Normal ASD operations are allowed once an adequate water supply is detected
at the seal, as detected by a pump-mounted reed switch that is connected to a
discrete input terminal of the ASD.
Set the discrete input terminal to
Settings:
0 — Disabled
1 — Enabled
Direct Access Number — F485
Parameter Type —
Selection List
Factory Default —
Disabled
Changeable During Run —
Yes
Direct Operation (Virtual Linear Pump) Command Value via
Communications
Program
Virtual Linear Pump
Virtual Linear Pump Settings
During a properly configured
Virtual Linear Pump
operation while operating
in the
Direct
mode and using communications for system control, this
parameter establishes the
Virtual Linear Pump
level.
This parameter setting is effective
ONLY
while operating in the
Direct
mode
and while receiving a command via communications. The end value of this
parameter setting appears in the
Frequency Command
screen as shown below.
Direct Access Number — F486
Parameter Type —
Numerical
Factory Default —
0.0
Changeable During Run —
Yes
Minimum — 10
Maximum — 165
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Страница 3: ...Document Number 64054 004 February 2013 P9 ASD Installation Operation Manual TM ...
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