HP FM Centrifugal Pump PCN=71576526 - Manual (Page 18)

FM USER INSTRUCTIONS ENGLISH 71576526 - 03/07
Page 18 of 32
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Connection wiring diagram for three phase motors:
Delta connection
Wire up the motor terminals according to the voltage
supply, in accordance with the description plate fixed
on the motor and with the connection wiring diagram
mentioned on the terminal box as opposite.
To avoid any risk of jamming, the
direction of rotation will be checked after priming of
the pump (§ 5.3.1, 5.3.2) and before the first start (§
5.4.2).
4.5 Protection systems
The following protection systems are
recommended particularly if the pump is installed in
a potentially explosive area or is handling a
hazardous liquid. If in doubt consult Flowserve. If
there is any possibility of the system allowing the
pump to run against a closed valve or below
minimum continuous safe flow a protection device
should be installed to ensure the temperature of the
liquid does not rise to an unsafe level.
If there are any circumstances in which the system
can allow the pump to run dry, or start up empty, a
power monitor should be fitted to stop the pump or
prevent it from being started. This is particularly
relevant if the pump is handling a flammable liquid.
If leakage of product from the pump or its associated
sealing system can cause a hazard it is
recommended that an appropriate leakage detection
system is installed.
To prevent excessive surface temperatures at
bearings it is recommended that temperature or
vibration monitoring are carried out. See sections
5.5.4 and 5.5.5.
If a defect of cooling can lead to temperature higher
than those acceptable a system of cooling
surveillance must be installed.
Except when explicitly required by the customer in
the specifications, when a possibility of reverse
rotation exists the customer must install a reverse
rotation protection device.
The customer must install all equipment required to
avoid water hammer.
5 COMMISSIONING START-UP,
OPERATION AND SHUTDOWN
These operations must only be carried out
by qualified personnel.
5.1 Direction of rotation
Starting or operating pumps with the
wrong direction of rotation can be harmful to the
pumps. Ensure that the pump rotation is the same
as the arrow on the pump casing.
It is preferable to check the direction of rotation
before installing the coupling. If not, the pump must
be filled in with the liquid before start-up.
If maintenance work has been carried
out to the site's electricity supply, the direction of
rotation should be re-checked as above in case the
supply phasing has been altered.
5.2 Guarding
Guarding is supplied fitted to the pump set.
If this has been removed or disturbed ensure that all
the protective guards around the pump coupling and
exposed parts of the shaft are securely fixed.
5.3 Priming and auxiliary supplies
Where there is any risk of the pump being run
against a closed valve generating high liquid and
casing external surface temperatures it is
recommended that users fit an external surface
temperature protection device.
Ensure all electrical, hydraulic,
pneumatic, sealant and lubrication systems (as
applicable) are connected and operational.
Ensure the inlet pipe and pump
casing are completely full of liquid before starting
continuous duty operation.
These operations must be carried out by personnel
with approved qualifications.
5.3.1 Priming of a flooded pump
a) Close the discharge valve, fill the pump by
opening the suction valve. Let air escape by
removing the plug located on the piping.
b) The discharge pipe is headed and there is a by -
pass valve on the check valve, open slightly the
discharge valve and the by-pass of the check
valve.
c) When the pump is totally free of air bubbles,
replace the plugs.
Star connection