Goulds Pumps 3311 - IOM - Manual (Page 17)

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6 Starting & Stopping Procedures
6.1 Prerequisites
The pump or the pump set must have been installed in
accordance with the instructions of Section 5.
6.2 Safety measures
• If there is no shaft seal, interrupt all further work and
install a shaft seal. Priming the pump with the liquid
handled in the absence of a shaft seal may present a
human-health or environmental hazard.
• Ensure that people and the environment are not put at
risk through explosive, toxic, hot, crystalline, or acid
liquids handled.
• Be sure that all electrical connections comply with the
local rules and regulations and that this work is done
by authorized personnel only.
CAUTION
• Fill bearing housings with oil.
• The pump must be completely primed and vented.
• Check the direction of rotation only with the pump
primed.
• If the liquid handled is hot, the pump should be filled
slowly so as to avoid distortions or heat shocks.
• The flow rate should be changed at constant speed
only on the discharge side. During operation the
regulating valve in the suction or feed line should
always be fully open.
• Do not run the pump with the regulating valve closed
for more than 30 seconds, if there is no minimum flow
bypass line.
• Safety measures should be taken at the customer's end
to ensure (for example by means of a relief valve) that
the permissible pump casing pressure is not exceeded
during operation.
• Repeat the alignment of the coupling at operating
temperature. Re-align the pump or the motor, if
necessary.
6.3 Electrical connection
Connect the electrical supply to the motor in accordance
with the connection diagram in the terminal box.
6.4 Checks before first start-up
- Are the pipelines connected and are the flange
connections tight?
- Is the pump incl. the pipework correctly primed?
- Is the shut-off valve in the discharge line closed?
- Is the shut-off valve in the suction or feed line fully
open?
- Is the motor ready?
- Is the direction of rotation of the motor correct? (Check
by momentarily switching on the motor.)
- Is the coupling correctly aligned (see Section 5)?
- Can the washers of the foot-fastening be moved? (see
subsection 5.5)
- Has the shaft seal been installed?
- Are the supply lines, if any, to the shaft seal open?
- Has the bearing housing been correctly filled with oil?
(see subsection 7.3.1).
CAUTION
• If the discharge pressure does not rise steadily as the
speed increases, stop the motor and re-vent and refill
the pump.
• Do not switch the pump on and off more often than
ten times per hour (this applies to a max. density of
1000 kg/m³ of the liquid handled). The motor
manufacturer's instructions must be followed.