6
6.) Slowly close the discharge valve until the cavitation is
no longer heard.
7.) The pump is now adjusted so that the system
demand will not exceed what can be supplied.
8.) If the supply pressure or water demand varies
over time, this procedure may need to be repeated to
eliminate cavitation.
DRIvE DIP SWITCH OPTIONS
The Inline System is factory set to properly operate in
most installations without needing any adjustments
or changes to the DIP switch settings. If changes are
required, the following is a description of what control
logic changes will occur as a switch’s position is
changed.
WARNING
Serious or fatal electrical shock may result
from contact with internal electrical components. DO
NOT, under any circumstances, attempt to modify DIP
switch settings until power has been removed and
5 minutes have passed for internal voltages to discharge!
Power must be removed for DIP switch setting to
take effect.
UNDERLOAD SENSITIVITY SELECTION
The Inline System controller is configured at the factory
to ensure detection of underload faults in a wide variety
of pumping applications. In rare cases this trip level
may result in nuisance faults. If the underload switch
is activated it is best to observe the system’s behavior
during the underload condition to be sure it will perform
as expected. Once the controller begins to regulate
pressure, check operation at several flow rates to make
sure the default sensitivity does not induce nuisance
underload trips.
If it is necessary to adjust the underload sensitivity,
remove power and allow the controller to discharge. Wait
5 minutes to allow internal voltage to dissipate, locate
the DIP switch bank. Use a small screwdriver (provided)
to move position 1 to “ON” as shown.
STEADY FLOW SELECTION
The Inline System is configured at the factory to ensure
quick response to maintain constant pressure. In rare
cases (as with a water line tap before the pressure
tank), the unit may need to be adjusted to offer better
control. If the unit is used on a system that has a water
line tap before the pressure tank or where audible
speed variations of the pump can be heard, adjusting
the pressure control response time may be necessary.
After enabling this feature, the installer should check
flow changes for possible overshoot. A larger pressure
tank and/or wider margin between regulation and valve
pressure may be required as the steady flow feature
reduces the controller’s reaction time to sudden changes
in flow.
If it is necessary to adjust the pressure control, remove
power and allow the controller to discharge. Wait 5
minutes to allow internal voltage to dissipate, locate the
DIP switch bank. Use a small screwdriver (provided) to
move position 2 to “ON” as shown.
restrictions in the plumbing and will be more pronounced
the farther the taps are from the pressure sensor. This
would be true of any system, and if observed, should not
be interpreted as a failure in the performance of the Inline
Constant Pressure System
.
ADJUSTING THE PRESSURE SENSOR
The pressure sensor communicates the system pressure
to the Inline Constant Pressure System. The sensor
is preset at the factory to 50 psi (3.4 bar), but can be
adjusted by the installer using the following procedure:
a. Remove the rubber end-cap (
FIGURE 4).
b. Using a 7/32" Allen-wrench (provided), turn the
adjusting screw clockwise to increase pressure and
counter-clockwise to decrease pressure. The adjustment
range is between 25 and 80 psi (1.7 and 5.5 bar)
(1/4 turn = approximately 3 psi (0.2 bar)).
c. Replace the rubber end cap.
d. Cover the pressure sensor terminals with the rubber
boot provided (
FIGURE 4)
ADJUSTING PUMP SO SYSTEM DEMAND IS NOT
MORE THAN SYSTEM SUPPLY
Inline Systems are typically used to increase municipal
water pressure anywhere from 10 psi (0.7 bars) to 70
psi (4.8 bars) above what is being supplied by the water
utility. For the pump to operate properly as it boosts the
municipal water to the desired pressure, a consistent
and steady flow of water is required. The system will fail
prematurely if it is set to operate at a point beyond what
can be supplied.
PROCESS TO ENSURE PUMP IS RECEIVING
ENOUGH WATER TO MEET DEMAND
1.) Install a shut-off valve in the plumbing near the
discharge of the pump.
2.) Close the valve, but make sure that the supply water is
allowed to freely flow into the pump without restriction.
3.) Adjust system for maximum flow demand.
4.) Turn on the pump, and begin opening the discharge’s
shut-off valve.
5.) Continue opening the discharge valve until a very
distinct noise is heard coming from the pump. This noise
is called Cavitation (which can destroy the pump over
time), and will sound like there is gravel inside the pump.
STOP opening the discharge valve once cavitation
is heard.
FIGURE 4:
Non-Adjustable
Set at 100 psi
Quick Connect
Lead Connect
Pressure
Sensor
Boot
Remove Rubber End Cap To Adjust Pressure
With 7/32" Allen Wrench Provided
Pressure Sensor
(Red/Black)
Pressure Shut-off Sensor
(Green/White)
Optional
