Phase Technologies SD Series - Page 52

46 | P a g e
Lead/Lag parameters are only displayed when System Configuration has been set for constant
pressure. The parameter SYSTEM CONFIG is in the Interface Parameters sub-menu. See Table 16
and Section 6.5, System Configuration, for details. More information on Lead/Lag can also be found in
Section 7.5, Lead/Lag Pump Control.
Table 18 - Lead/Lag Parameters
DISPLAY MESSAGE
DESCRIPTION
DEFAULT/MIN
/MAX VALUE
NUMBER LAG PUMPS
Sets the number of auxiliary pumps that are connected to the
relays on the control board. The relays will be called for in order,
starting with Relay 1.
0/0/2
STAGE PUMP DELAY
In seconds. Delay before the system will call for a pump to be
staged in.
4/0/3600
DESTAGE PUMP
DELAY
In seconds. Delay before the system will de-stage a pump when
pressure is maintained at MIN FREQUENCY of the primary
pump.
4/0/3600
STAGE FREQUENCY
REDUCTION1
In Hz. Reduces frequency of primary pump for the duration of
the STAGE TIME when the specified pump is staged in.
Lag #1: 5/0/120
STAGE FREQUENCY
REDUCTION2
Lag #2: 5/0/120
STAGE TIME
In seconds. This is the interval for which the system will reduce
its frequency by STAGE FREQ REDUCTION
4/0/3600
DESTAGE FREQ
BOOST1
In Hz. Increases frequency of primary pump for the duration of
the DESTAGE TIME when the specified pump is de-staged.
Lag #1: 5/0/200
DESTAGE FREQ
BOOST2
Lag #2: 5/0/200
DESTAGE TIME
In Seconds. This is the interval for which the system will
increase its frequency by DESTAGE FREQ BOOST
4/0/3600
STAGE psi LAG
In psi. Allows the system to fall below the control psi by this
amount before the system starts counting STAGE TIME.
Assumes max Hz.
5/0/200
DESTAGE psi LAG
In psi. Allows the system to exceed the control psi by this
amount before the system starts counting DESTAGE TIME.
Assumes min Hz.
3/0/200
DESTAGE MIN
FREQUENCY
In Hz. MIN FREQUENCY of primary pump plus this amount to
de-stage.
5/0/120