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II-L. ENGINE DRIVEN UNITS
Safe and efficient operation of a pumping unit driven by an engine, whether diesel, or gasoline requires the
installation to satisfy the following requirements:
(a) Be well ventilated to keep the ambient temperature as low as possible. Taking 60
100 F rise in temperature reduces the horsepower of the engine by approximately 1%.
(b) Provide ample air for proper combustion.
(c) Provide the engine with an efficient exhaust system so that the combustion gases discharge with a
minimum of back pressure.
(d) Provide for a fuel system of adequate capacity which meets the local codes. (e)
Provide ample accessibility to service engine.
(f)
Provide correct rotation of the pump. Engine rotation is determined at the factory. No mange of engine
rotation can be made in the field.
It is recommended that the operator become familiar with the installation and service manual supplied by the engine
manufacturer.
II-M. ELECTRIC MOTOR DRIVEN UNITS
For electric motor drives, connect power supply to conform with national and local codes. Line voltage and wire
capacity must match the ratings stamped on the motor nameplate.
(a) Only when the coupling halves are disconnected, momentarily energize the motor to check that rotation is in
the same direction as the arrow on the pump,
(b) If motor is three phase type, reverse rotation (if required) by interchanging any two of the three power leads.
The rotation of most single phase motors is fixed by internal wiring and cannot be easily changed.
4852840
0
F as a datum point, every
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