Flowserve WUC Worthington - Manual (Page 23)

WUC USER INSTRUCTIONS ENGLISH - 07/14
Page 23 of 52
4.5.4 Drain
This connection is used for total drainage of the Can.
We recommend the installation of a T-piece with
suitable valves in the vent line. Any neutral gas can
then be brought to the suction side of the pump.
Through the pressure built up by the gas, the
remaining liquid will be pressed out of the Can
through the drain connection and can be led back to
the suction tank. Of course the vent line to the
suction tank must be blocked. If all the liquid is
discharged through the drain line, continue pressing
in gas for a while to take away all explosive or
hazardous gases.
4.6 Electrical connections
Electrical connections must be made by a qualified
Electrician in accordance with the relevant local
national and international regulations.
It is important to be aware of the EUROPEAN
DIRECTIVE on hazardous areas where compliance
with IEC60079-14 is an additional requirement for
making electrical connections.
It is important to be aware of the EUROPEAN
DIRECTIVE on electromagnetic compatibility when
wiring up and installing equipment on site. Attention
must be paid to ensure that the techniques used
during wiring/installation do not increase
electromagnetic emissions or decrease the
electromagnetic immunity of the equipment, wiring or
any connected devices. If in any doubt contact
Flowserve for advice.
The motor must be wired up in accordance with the
motor manufacturer's instructions (normally supplied
within the terminal box) including any temperature,
earth leakage, current and other protective devices
as appropriate. The identification nameplate should
be checked to ensure the power supply is
appropriate.
A device to provide emergency stopping must
be fitted.
If not supplied pre-wired to the pump unit the
controller/starter electrical details will also be supplied
within the controller/starter.
For electrical details on pump sets with controllers
see the separate wiring diagram.
See section 5.4, Direction of
rotation before connecting the motor to the electrical
supply.
4.7 Final shaft alignment check
After connecting piping to the pump, rotate the shaft
several times by hand to ensure there is no seizure
and all parts are free.
Recheck the coupling alignment, as previously
described, to ensure no pipe strain. If pipe strain
exists, correct piping.
4.8 Protection systems
The following protection systems are
recommended particularly if the pump is installed in a
hazardous environment 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.
5.0 COMMISSIONING START-UP,
OPERATION AND SHUTDOWN
These operations must be
carried out by fully qualified personnel.
5.1 Precommissioning procedure
a) The bearing housing must be filled with the
indicated oil. Check also the oil level.
b) The pump must be completely filled with liquid to
avoid running dry and to guarantee a correct
performance of the pump. Open once again all
vent connections to check the complete filling of
the pump. The venting procedure can take from 10
min. up to 2 hours, depending on the kind of fluid
(except cryogenic service).