a. Procedure of installation of suction and discharge pipe connections shall be in accordance to
related plumbing and/or water system codes & local regulations.
b. Standard practice that suction diameter of the pipe should be larger than the suction diameter
of the pump. Use eccentric reducer in pump suction and concentric reducer in pump discharge.
c. Net Positive Suction Head (NPSH) should be calculated against the depth of water source
(Tank) to avoid cavitation.
d. For negative suction or suction lift, install priming pipe with isolation valve in suction pipe for
proper priming procedure.
e. Minimum distance of 10 pipe diameter from any fixtures, valves and fittings to pump suction is
recommended to produce laminar flow in suction pipe.
f. Avoid numerous off-setting in suction pipe to avoid producing of cavitation.
g. Proper support brackets and/or thrust blocks in suction & discharge pipe must be installed.
h. Valves, fixtures and fittings must be followed in accordance to plumbing and/or water system
codes & local regulation with all necessary mechanical valves to protect the pump and piping
system during operation.
i. If pump is supplied with packing gland seal, it is recommended to install drain pipe to avoid
flooding of water inside the pump room.
5. Wiring Connections for Electric Motors
a. Procedure of installation of wires and cables for electric motor shall be in accordance to
related electrical code & local regulations.
b. Wire or cable sizes must be appropriate to Kilowatt (kw) or Horsepower (hp) rating of electric
motor. Kindly refer to electrical code & local regulations.
c. Procedure of wire or cable termination or connection to electric motor terminal box should
be followed in accordance to electric code & local regulations.
d. Wires or cables should be installed in metal conduit or light tight conduit.
e. Electrical components related in protecting the electric motor against irregular conditions
should be installed in control panels.
f. Motor connection should be properly connected in either delta or wye (/ Y) in direct on-line
(DOL) connection depending on voltage rating. Refer to the motor nameplate for proper wire
connection.
SECTION VI. OPERATION PROCEDURE
1. Pre-start-up & Checking
a. Wear Personal Protective Gear or Equipment prior for start-up and operation.
b. Prepare your instrument or tools to observe the performance of the pump.
c. Check water source. Never operate the pump if water has presence of sand or any solid
particles.
d. Check all valves & fittings. Never activate the pump where suction and discharge isolation
valve is closed.
e. “Prime” the suction pipe prior for start-up. Remove trap air by unscrew the plug located in
pump volute.
f. Inspect shaft seal (packing or mechanical) if it is properly installed. For packing gland, adjust
the packing nut necessary to avoid excessive water leak during operation.
g. Inspect pump shaft alignment. It may misalign during shipment, improper handling and
installation.
