Franklin Electric Pompes Submerisbles 4 Po Manuel Du Propriétaire page 5

Well Test
Risk of damage to pump or other equipment.
• Never run pump unless it is completely submerged in water to avoid pump and motor damage
• Air drawn into the pump can cause an airlock under certain conditions.
1. Install a partially opened gate valve on the end of the pipe.
2. Start the pump and slowly open valve to full flow.
3. If the discharge water is not clear within 30 minutes, stop pump and take necessary steps to correct.
4. Close valve until maximum required system flow rate is obtained.
5. Ensure the pump output is not greater than the yield of the well (low-yielding) by monitoring the
well draw-down level at the maximum system flow rate.
• Refer to "Low-Yielding Well" on page 5
Low-Yielding Well
1. Install a smaller pump. Consult licensed water systems professional contractor for sizing.
2. Add additional length of drop pipe to place pump lower in well.
3. Install a Franklin Pumptec or similar electronic run-dry sensor.
4. Install a float-less liquid level control to work with the pressure switch.
5. Place a flow control valve in the discharge line upstream from the pressure switch to restrict output.
• A pressure tank with a bonded diaphragm, air cell, or water bag is recommended.
6. Install a low-pressure cut-off switch.
MAINTENANCE
Check Valve Replacement
Risk of damage to pump or other equipment.
• Fluid draining back through the pump can cause the pump to rotate backwards. If pump/motor starts during this
time, damage to the pump can occur.
Most 4" submersible pumps come standard with an internal check valve to prevent water back flow
(order no. 305614000).
To remove:
1. If the pump discharge has a snap ring blocking
the check valve, remove using a standard size
snap ring tool, such as Rotor Clip RP-100.
2. Unscrew the check valve assembly (clockwise)
using a T-handle wrench, sold separately
(order no. 101218901).
NOTE: Check valves are reverse (left-hand) threaded.
For reassembly, tighten the check valve to 15 inch-pounds.
to correct issue.
Check Valve
MAINTENANCE
Well Test
T-Handle Wrench
5