Goulds Pumps CV 3171 - IOM - Manual (Page 23)

CV 3171 IOM 05/11 23
For Dry Pit/Outside tank mount units:
1. Suction supply line must have adequate fluid
head to prime the pump.
2. Slowly open the suction valve.
Starting the Pump
1. Before the pump is started, the external
bearing flush (if specified) must be started.
2. Make sure the pump shaft is freely rotating.
3. Partially open the discharge valve.
4. Start driver.
5. Slowly open discharge valve until the desired
flow is obtained.
CAUTION
Observe pump for high vibration
levels,
bearing temperature, and
excessive noise. If normal levels are
exceeded, shut down and resolve.
Immediately observe pressure gauges. If
discharge pressure is not quickly attained, stop
driver, check submergence level, and attempt to
restart.
Start Up Precautions
1. All equipment and personal safety-related
devices and controls must be installed and
operating properly.
2. To prevent premature pump faiure at initial
start up due to dirt or debris in the pipe
system, ensure the system has been
adequately cleaned and flushed.
3. Variable speed drivers should be brought
to rated speed as quickly as possible.
4. Variable speed drivers should not be
adjusted or checked for speed governor or
overspeed trip settings while coupled to the
pump at initial start up. If settings have not
been verified, uncouple the unit and refer to
driver manufacturer’s instructions for
assistance.
6. Pumpage tempartatures in excess of 200°F
will require warmup of pump prior to
operation. Circulate a small amount of
pumpage through the pump until the casing
temperature is within 100°F of the pumpage
temperature and evenly heated.
CAUTION
When starting pump,
immediately observe pressure
gauges. If discharge pressure
is not quickly attained, stop
driver, reprime, and attempt to restart.
OPERATION
General Considerations
CAUTION
Always vary capacity with
regulating
valve in the
discharge line. Never throttle
flow from the suction side.
CAUTION
Driver may overload if the
pumpage
specific gravity
(density) is greater than
originally assumed, or the rated flow rate is
exceeded.
CAUTION
Always operate the pump at or
near the rated conditions to
prevent damage resulting from
cavitation or recirculation.
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