Goulds Pumps NM3171 - IOM - Manual (Page 20)

OPERATION
s
! WARNING
Check motor rotation before coupling motor
to pump. Refer to Rotation Check (page 12)
for instructions.
s
! CAUTION
Serious damage may result if pump is run in
the wrong rotation.
START-UP PROCEDURE
1. Connect coupling, following instructions for the
particular make of coupling used. This data is
supplied separately, giving complete instructions
for connection, lubrication, alignment and
maintenance.
2. Check for free turning.
3. Install coupling guard.
s
! WARNING
Never operate a pump without coupling
guard properly installed. Personal injury will
occur if pump is run without coupling guard.
4. Before pump is started, the flushing flow
specified in Precautions, Step 6 (page 10)
should be started. Do not run the pump without
flush to the column bearings (213). (Internal for
clean liquids - external for dirty liquid).
5. Starting: Pump is now ready to start. Start pump
with closed or slightly opened discharge valve.
Open immediately after starting.
OPERATIONAL CHECKS
Inspect pump carefully and frequently during the first
few hours of operation. Check motor for excessive
heating. Check motor for excessive vibration or
unusual noise. Do not run pump at greatly reduced
flow because all the motor power will go into heating
the liquid in the pump and damage may result. If this
condition exists over a long period, the temperature
of the liquid in the pump may increase until the
boiling point is reached. If this occurs, the rotating
parts are exposed to vapor with no lubrication, and
they may score or even seize to the stationary parts.
Continued operation under these conditions may
create an explosive hazard due to the confined
vapor under high pressure and temperature.
OPERATING WITH SURGE CONDITIONS IN
LINE
If the pump is installed with a quick-acting valve in
the discharge line that could close when the pump is
running, dangerous pressure surges may be built up
that can cause damage to the pump or line. In
services of this kind, some cushioning arrangement
must be provided to protect the pumping equipment.
FREEZING CONDITIONS
If exposed to freezing conditions while the pump is
standing idle, liquid inside the pump must be
drained.
SHUTDOWN PRACTICE
When a check valve is installed in the discharge, the
pump can be shut off without closing any valves.
When no check valve is used, the discharge valve
must be closed before the pump is stopped to
prevent back flow through the pump.
s
! WARNING
When handling hazardous and/or toxic fluids,
proper personal protective equipment should
be worn. If pump is being drained,
precautions must be taken to prevent
physical injury. Pumpage must be handled
and disposed of in conformace with
applicable environmental regulation.
14
NM 3171 IOM 5/08