QED AutoPump AP-2, Operation Manual

Page: 64 / 111

QED Environmental Systems
AP-2 Manual
Page 56
4. Fluid Inlet Clogged :
• If the fluid inlet screen is clogged with debris, or if a Bottom-Loading pump is on the
bottom of the well, water cannot enter the pump.
5. Debris, Scale, or very Viscous Fluid :
• If debris, scale or a very viscous fluid has accumulated inside the pump, the float
may not move freely up and down, or the control rod may not slide easily through
the float.
• Clean the float, control rod, and the casing. See Chapter 6 for cleaning instructions.
6. Float Pins :
• Determine if any part of the float foam itself can contact the discharge pipe. Move
each end of the float back and forth, sideways, to ensure that the pins on the plate
of the float prevent float foam contact with the pipe. Call QED for repair options.
Note:
If viscous materials cause continual problems, contact QED for possible
solutions.
7. Debris in Air Inlet Valve :
• Open the pump. Connect the air supply. Adjust the air pressure to 40 psi. Pull the
control rod down. Listen to determine if significant volume of air leaks through. A
leak rate of 4 SCFH or less is within specification (this is a small leak that produces
bubbles in a soapy water solution). If so, clean the valve by blowing air or water
through it from both ends.
• If air still leaks through the valve with the control rod down, the air-hose must be
removed to access the valve inlet to check for debris in the valve or in the hose
pigtail.
• Push the rod upwards. If little or no air passes through, remove the air-in hose to
access the valve inlet. Blow air through the valve from the poppet side to clear debris
from the ball and seat.