ELECTRICAL HOOK-UP FOR UNITS SUPPLIED WITH DC MOTOR
The motor must be fused to protect the electrical system. Use a 35-amp slow-blow fuse or circuit breaker for -EH
pumps and a 45-amp slow-blow fuse or circuit breaker for -E2H pumps.
The motor lead wires are identified by color with (+) being red and (-) being negative. For proper pump rotation, the
connections should be made as follows:
• Positive Motor Lead (+) to Positive Power Lead (Red, +).
• Negative Motor Lead (-) to Negative Power Lead (Black, -).
- 22 -
Assembly and Installation - cont’d.
System Installation
ATTENTION: Use only pipe, fittings, accessories, hose, etc. rated for the maximum pressure rating of the pump.
1. Select adequate size drive unit to avoid overloading. Avoid unnecessary restrictions in the line such as elbows,
check valves, and all extraneous curves and bends.
2. Avoid using looped sections of tubing or pipe which might permit air to become trapped.
3. Use pipe joint sealant on pipe threads to assure watertight connections, and ensure that the sealant used is
compatible with any chemicals which will be pumped.
4. Selection of the right size and type of hose is vital for good performance. Be sure to hook up to the proper
ports on the pump (note markings “IN” and “OUT” on pump label).
a. Always use a suction hose compatible with the fluids being pumped and at least the same inside diameter
as pump ports. If the suction hose is over 5 feet long, use one size larger hose. Keep the suction hose as
short as possible and restrictions such as elbows, check valves, etc. at a minimum.
Attention: Suction lift not to exceed 3 feet.
b. High pressure pumps require the use of special high pressure discharge hose. Use a hose rated at least
50% greater than the highest operating pressure of pump. Example: If required pump pressure is 300 psi
[20.7 Bar], use hose rated at minimum of 450 psi [31.0 Bar] working pressure.
5. Use a suction line strainer with at least 3 to 5 times the suction port area in open screen area. Be sure the
screen is suitable for the liquid being pumped. The mesh should be appropriate for the nozzle tip to be used,
to avoid clogging.
Never attach an agitator or any restriction to a bypass line of a pressure relief device because system damage
may occur.
Pump
Bypass Line
Strainer
Pressure Regulator
Pressure
Relief
Valve
Figure 7
Typical System Installation
Figure 6
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