Sun Pumps SJT10-120BL - Manual (Page 6)

3.3 Shallow Well Pump Installation
1. Write the pump, motor and controller model number and serial number in the space provided on the last page in this Instruction
Manual. This information will be needed when filling out the Warranty Card. And will aide in any troubleshooting if necessary.
2. Inspect all components for shipping damage and insure that you have all the components that are required for a complete installation.
3. Locate the pump on a flat surface close to the water source but do not mount in direct sunlight. The motor requires free circulation of
air so always install in a well-ventilated and dry area.
4. Keep the suction line as short and as direct as possible. This reduces the friction losses through the pipe and fittings. The suction line
should have continuous slope from the lowest point in the line to the inlet of the pump. Make sure there are no loops or high spots in
the suction line that could trap air. To avoid air pockets, slope the horizontal pipe continuously upward from the water source to the
pump by at least 1” for every 30” of horizontal run.
5. Make sure the suction joints are tight. The suction line should be the same size or larger than the suction port, 1 ¼”. Increase the pipe
size if the pipe run is over 50 feet.
6. Install a foot valve at the end of the drop pipe, if the well is 2” or larger. Lower the drop pipe with the foot valve into the well. Keep
the foot valve off the bottom of the well at least 5 feet if possible. This will lower the chance of debris being pulled into the suction
screen or the pump. Barbed type connectors should always be double clamped. For poly pipe, compression fittings are
recommended.
7. Connect the suction pipe to the suction end of the pump as shown in Figure 1.
8. Install a 1” priming tee to the discharge port of the pump as shown with the pipe plug at the top. The pipe plug can be removed to fill
the suction pipe and the pump housing with water before start-up. After priming the pump, reinstall the pipe plug and tighten.
Always use a pipe thread sealant.
9. For an open discharge system, install a control valve on the discharge line as shown in Figure 2. The valve is used to regulate the
internal pressure of the pump for proper jet performance. Connect the pipeline from the valve to the place of use.
Figure 1 Typical Shallow Well Suction Pipe Installation