Plumbing Considerations For Priming Purposes - Franklin Electric Inline 400 Manuel Du Propriétaire

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Inline Pressure Boosting System

Plumbing Considerations for Priming Purposes:

The Inline 400 needs to be primed with water before it can function properly. There are two internal
non-return (check) valves built into the head of the unit that need to open during priming. This
requires that the priming water has an incoming pressure of 1.5 psi minimum. This is especially
important if the application involves boosting water out of a shallow cistern. There are two simple
ways to accomplish this in the suction plumbing.
ADD WATER FOR PRIMING HERE
PRIMING TUBE
INLET
PRIMING: 1.5psi can be achieved on the
inlet by pouring water through a 3' vertical
water column. Be sure to keep the inlet
valve closed and open the air-bleed valve
until all air is purged from unit.
Inline 400 Priming:
Never run the pump dry. Fill the suction pipe, pump housing, and discharge piping completely with
water. A typical installation will be supplied by either a tank or a pressurized water source, creating
what is known as flooded suction condition
With the unit fully plumbed into the system, open the water supply valve and allow pressurized
water to flow through the unit. Place a small bucket under the Inline tank to capture water that is
expelled from the air-bleed during priming. With a small flathead screwdriver, slowly open the air
bleed valve (located directly under the outlet) to allow air to exit the internal pump and tank. When
the valve stops sputtering and only a fine stream of water is being expelled, close the air bleed
valve. The unit is now primed and ready for operation.
10
SHUT-OFF VALVE
OUTLET LINE
OUTLET VALVE
AIR BLEED VALVE (VENT)
GARDEN HOSE FITTING
INLET
PRIMING: Adequate inlet pressure/
flow can be achieved on the inlet by
connecting a garden hose to a fitting
on the inlet side of the pump. Be sure
to keep the inlet valve closed, turn on
water supply, and open the air-bleed
valve until all air is purged from unit.
OUTLET LINE
OUTLET VALVE
AIR BLEED VALVE (VENT)

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