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CAUTION: By default, AUX1 is programmed such that OPEN=STOP, CLOSED=RUN
and AUX2 is programmed such that OPEN=RUN, CLOSED=STOP. When SYSTEM
CONFIG = 2 (Analog CP), AUX1 and AUX2 are programmed such that OPEN=RUN,
CLOSED=STOP. See parameters AUX1 SELECT and AUX2 SELECT to change this
setting.
5. Navigate through the keypad Main Menu item CHANGE PARAMETER VALUES >
INTERFACE PARAMETERS > SYSTEM CONFIG. Select 1 to set the system
configuration for an analog CP system ( see Table 13 for details)
6. To set the emergency over-pressure limit switch, remove the rubber boot from the
switch and pry the plastic plug from the top of the switch housing to access the
pressure adjustment screw. Use an Allen wrench to adjust the pressure setting of the
switch and run the pump in the AUTO mode, and observe the pressure gauge, turning
the Allen screw to adjust the pressure shut-off point. The emergency over-pressure
limit switch should be set at least 10 PSI higher than the desired constant
pressure set point.
7. Connect the positive terminal of the transducer to the I+ Control Terminal, and the
negative terminal to the I- Control Terminal.
CAUTION: It is critical that the positive terminal of the transducer is connected to the
(+) terminal of the 4-20mA control terminal and that the negative terminal of the transducer
is connected to the (–) terminal of the 4-20 mA control terminal.
8. Set the psi SETPOINT on the keypad (see Table 13, Constant Pressure Parameters
for details)
9. Set the keypad to AUTO mode to operate the system
7.7 Pre-Charge Mode
When filling a large plumbing system with water, it may be desirable to fill at a slow pump
speed so that when the system reaches the full point, water hammer does not cause
damage such as sprinkler head blow-off or burst pipes. To achieve this, the drive is
equipped with a pre-charge feature.
This feature is disabled if the PRECHARGE TIME parameter is set to zero. The frequency
of the pump will not exceed the value set by the PRECHARGE FREQ parameter during the
pre-charge interval.
The pre-charge interval will terminate when the system pressure exceeds the setting of the
PRECHRG psi parameter. In this case, the PRECHRG psi must be lower than the psi
SETPOINT.
The pre-charge interval occurs whenever the drive is switched from OFF to AUTO or
MANUAL > RUN.
Pre-charge Mode Setup:
1. Navigate through the keypad menu to:
CHANGE PARAMETER VALUES > CONSTANT PRESSURE PARAMETERS >
PRECHARGE FREQ
Enter the Pre-charge frequency
2. Navigate through the keypad menu to:
CHANGE PARAMETER VALUES > CONSTANT PRESSURE PARAMETERS >
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