Franklin Electric Inline 400 Owner's Manual page 11

Operating the Inline 400:
All air must be removed from the system. The Inline Pressure Boosting System comes with an air
bleed valve installed to assist with evacuating the air.
1. Close all system outlets then open the air bleed valve.
2. Open any inlet valves to allow water supply to enter the pump. Be prepared for air mixed
with some water to be discharged through the air bleed valve. It may be handy to have a
small bucket to catch the dispersed water.
3. Close air bleed valve once all the air has exited the system (indicated by a small, steady
stream of water coming out of the bleed valve.)
4. Once the air has been evacuated from the system, slightly open a system outlet valve. Start
the pump by pressing the button. This will put the pump into automatic mode.
5. Immediately begin opening a discharge valve to half open. If after a few minutes of running
you do not get pressurized water, repeat the priming process as detailed above. NOTE:
If the unit does not prime in 10 seconds, the pump will stop and the RED light will flash
on the display. This is due to an UNDERLOAD error condition in which the pump is not
yet incurring a load indicating water is being pumped. Simply press the start button again
to allow the pump to run for an additional 10 seconds in order to prime. REPEAT this as
necessary.
6. Once the pump is operating, fully open the discharge valve and a system outlet, letting the
pump operate until the water is running clear. No further priming should be needed unless
the pump is drained or there is a leak in the suction plumbing.
NOTE: NEVER OPEN THE BLEED WITH THE PUMP ON as this may allow air to ENTER the
pump rather than expel it from the system.
Effect of System Leaks:
Leaking water systems may cause the Inline Pressure Boosting System to cycle more than
expected. This is due to the unit turning on when the outlet pressure drops below the preset
discharge pressure (factory set at 40 PSI). Continuous running or a high number of starts and
stops will not hurt the controller, pump, or motor. The issue should still be fixed, if possible, to
eliminate an increase in power usage of the system.
Adjusting/Fine-Tuning Inline 400 Performance:
When installed properly with an external pressure tank (2-Gallon size recommended), it is possible
to adjust the pump CUT-IN pressure of the Inline 400 unit.
s
WARNING WARNING
!
The Inline 400 pump is factory set to start boosting (turn pump ON) when the discharge pressure
drops below 40 PSI. In certain applications, it may be desirable to adjust this setting to be higher
or lower. See the example below:
In this example, a home is supplied with pressurized water from the local municipality that
fluctuates between 30 PSI MAX and 25 PSI MIN. As stated earlier, the Inline 400 will add 55 PSI to
the incoming water pressure.
MAX Total Downstream Pressure is 30 PSI + 55 PSI = 85 PSI
MIN Total Downstream Pressure is 25 PSI + 55 PSI = 80 PSI
Inline Pressure Boosting System
Disconnect power to the unit before attempting to remove the
control cap and adjust the discharge pressure switch.
11