salmson NOEH, Инструкция по установке и эксплуатации

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ENGLISH
14
The harmonic currents that are created by the VSD pass through
motor ball bearings. Standard ball bearings can be used up to
55KW. For higher installed power (see engraved power on motor name
plate), the motor should be equipped with isolated ball bearings
(specific ball bearing) or with isolated bearing housing (and standard ball
bearing).
8 START ‐ UP
8.1 PRE ‐ COMMISSIONING
If the pump is installed in a potentially explosive atmosphere or
when dangerous or polluting fluids are pumped, it is advised (Zone
2) or requested (zone 1) to install additional protection devices.
Check following points :

Pump flow is always higher than authorized continuous minimum flow,

Pump never runs dry,

Normal leakage of the shaft seal is controlled,

Surface temperature bearings housings is lower than the maximum
admissible surface temperature in selected ATEX zone,

Pressure on discharge side of the pump is lower than pump maximum
allowable working pressure.

Set alarm and stop trips of sensors.
In every cases check :

Quality of electrical connections,

Protection devices are installed,

Auxiliary piping are connected,

Flanges connections,

Suction line and pump casing are filled with fluid,

Motor direction of rotation is correct,

Coupling alignment is correct,

Oil level was checked and greasing of ball bearings has been done,

Coupling guard is installed.
8.2 FILLING / VENTING
Before the very first start ‐ up, pump casing and suction line must be filled
with fluid (depending on piping system a vacuum pump may have to be
used).
Pump casing should be perfectly vented to avoid that the
mechanical seal runs dry.
Take precautionary measures when manipulating dangerous, hot
or polluting fluids. Wearing individual protective devices is
necessary. The operator must know the potential hazards.
8.3 START ‐ UP
If a barrier fluid, flushing fluid, cooling fluid or a heating fluid is
used, check that auxiliary systems are activated and working
correctly before pump start ‐ up.

Close isolating valve on pump discharge side.

Open all valves in suction line.

Proceed to pump priming (if not already done). Pump casing and
suction pipe should be completely filled with fluid.

Turn the pump on and check discharge pressure increase. Compare
this pressure to the shutoff pressure available on the hydraulic curve
In order to avoid an important overheating of the liquid inside the
pump the pump should not work more than 20 to 30 seconds
against a closed discharge valve.

If expected pressure is reached then progressively open the discharge
valve.
If there is no liquid delivered or if discharge pressure is too low
then see chapter “trouble shooting”.
8.4 RUNNING CHECKS
During operation of pump in duty conditions (capacity, head,
temperature, …) the following points must be checked :

Check and note pump duty point. If necessary convert pressure value
from bar indicated on the pressure gauge to mwc :
HMT
mce
= (P
bar
x 100) / (SG x 9,806) with SG= fluid Specific Gravity.

Check and note current consumption on each phase of the motor.

Check calibration of motor protections.

Check temperature of ball bearings (on bearing housing surface).

Check flexible coupling alignment after several pump starts (only for
concerned pumps variants).

Check tightening of flanges fastening bolts.

Check there is no leakage and no abnormal running noise.
When pumping hot fluids, the definitive coupling alignment should
be done only when system nominal temperature is reached and
stabilized. See chapter 7.1.4 COUPLING ALIGNMENT
Check the surface temperature on the bearing bracket and on the
pump casing. Check pumped fluid temperature. Alarm and stop
trips settings should be done according those values. Refer to specific
sensors IOM before adjusting those trips.
8.5 SHUTDOWN
Before the pump is stopped close the discharge isolating valve.
Ensure that the pump runs in that condition no more than few
seconds.
When the pump has come to a standstill : close the suction isolating
valve. If the pump is equipped with auxiliary systems such as a quench,
heating system, flushing, external lubrication, etc … it must be closed at
the last step.
If temperature is likely to drop below freezing point, pump casing
and auxiliary connected systems should be completely drained or
otherwise protected. For prolonged shut ‐ downs an adapted rust
protective coating should be applied to the inside and outside of the
pump.
Pumping explosive, toxic or polluting fluids : make sure that all
necessary actions were taken to avoid the creation of a hazard for
people or environment during drainage operations.
Products which are sent back to Salmson must be drained and
cleaned. Pumped fluid should be completely removed from the
pump.
9 MAINTENANCE
9.1 GENERAL INFORMATION
Only properly trained and skilled staff should undertake
maintenance operations.
Only authorized personnel should undertake maintenance on
ATEX certified equipments. Make sure to avoid creation of
explosion hazard while proceeding to maintenance in a ATEX zone.
All technical documents delivered with the pump should be known
and should be available near the pump.
The maintenance crew should be informed about the risks linked to the
use of the pump and to the pumped fluids before they can start working
on the equipment (dangerous products, fluid and pump temperature,
pressurized parts, …). They should be equipped with all appropriated
individual safety protections (glasses, gloves, …) and should respect local
industrial and security rules.
Pump contains a part of pumped fluid even when it is at a
standstill. Drain and flush pump casing with care before starting
pump disassembly.
Appropriate lifting devices should be available to help personnel moving
heavy loads.
The maintenance area must be clearly identified. Install warning boards
with the words « WARNING : machine under repair ! » on the pump and
on the control cabinet.
Any work on the machine must be performed when pump is
stopped. Prior to any maintenance or repair work the motor
should be electrically isolated and secured against uncontrolled start.
Lock the main switch open and disconnect circuit breaker. Withdraw the
fuses if any.