Sun Pumps SIJ 2.2-1300P-135 BL - Manual (Page 6)

3.3 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. The motor should be kept dry
and out of the rain and weather.
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 ½” or larger. Increase the pipe size to ¾”
if the pipe run is over 3 feet.
6. The SIJ series pump includes an unloader valve on the discharge side of the pump. Make sure it is adjusted to
relieve at a pressure that is under the pressure rating of the pipeline.
7. Always fill the suction pipe and the pump with water before you start the pump. Always use a pipe thread
sealant.
Inlet Condition Check-List
Review Before Start-Up
Inadequate inlet conditions can cause serious malfunctions in the best designed pump. Surprisingly, the simplest of
things can cause the most severe problems or go unnoticed to the unfamiliar or untrained eye. REVIEW THIS
CHECK-LIST BEFORE OPERATION OF ANY SYSTEM. Remember, no two systems are alike, so there can be
no ONE best way to set-up a system. All factors must be carefully considered.
INLET SUPPLY should be adequate to accommodate the maximum flow being delivered by the pump.
1. Open inlet shut-off valve and turn on water supply to avoid cavitating pump. DO NOT RUN PUMP DRY.
2. Temperatures above 130°F are permissible. Add 1/2 PSI inlet pressure per each degree F over 130°F. RPM changes may be required.
3. Avoid closed loop systems without a Thermo Valve high temperature protection.
4. Avoid low vapor pressure and high viscosity liquids.
5. Higher temperature liquids tend to vaporize and require positive heads.
6. When using an inlet supply reservoir, size it to provide adequate liquid to accommodate the maximum output of the pump, generally a
minimum of 6-10 times the GPM (however, a combination of system factors can change this requirement); provide adequate baffling in
the tank to eliminate air bubbles and turbulence; install diffusers on all return lines to the tank.
INLET LINE SIZE should be adequate to avoid starving the pump.
7. Line size must be a minimum of one size larger than the pump inlet fitting. Avoid thick walled fittings, tees, 90 degree elbows or valves in
the inlet line of the pump to reduce the risk of flow restriction and cavitation.
8. The line MUST be a FLEXIBLE hose, NOT a rigid pipe, and reinforced on SUCTION systems to avoid collapsing.
9. The simpler the inlet plumbing the less the potential for problems. Keep the length to a minimum, the number of elbows and joints to a
minimum (ideally no elbows) and the inlet accessories to a minimum.
10. Use pipe sealant to assure air-tight, positive sealing pipe joints.
INLET PRESSURE should fall within the specifications of the pump.
11. Optimum pump performance is obtained with +20 PSI (1.4 BAR) inlet pressure. With adequate inlet plumbing, most pumps will perform
with flooded suction. Maximum inlet pressure is 75 PSI (5.25 BAR).
12. After prolonged storage, pump should be purged of air to facilitate priming. Disconnect any discharge port and allow liquid to pass
through pump.
INLET ACCESSORIES are designed to protect against over pressurization, control inlet flow, contamination and provide ease of servicing.
13. A shut-off valve is recommended to facilitate maintenance.
14. A stand pipe can be used in some applications to help maintain a positive head in the inlet line.
15. Inspect and clean inlet filters on a regular schedule.
16. A pressure gauge is recommended to monitor the inlet pressure and should be mounted AS CLOSE TO THE PUMP INLET as possible.
Short term, intermittent cavitation will not register on a standard gauge.
17. All accessories should be sized to avoid restricting the inlet flow.
18. All accessories should be compatible with the solution being pumped to prevent premature failure or malfunction.
BY-PASS TO INLET Care should be exercised when deciding the method of by-pass from control valves.
19. The SIJ Series pumps come standard with a Regulating Unloader to handle by-pass liquid directed to the inlet line of the pump. If other
than standard valve is used, exercise caution to use proper flexible hose and adequate diameter.
20. A low-pressure flexible cloth braid (not metal braid) hose should be used from the by-pass connection to the inlet of the pump.