Electrical Connection; Operation With Frequency Converter - salmson NEXIS-V 22 Instalacion Y Puesta En Servicio

ENGLISH
NOTE: Depending on fluid characteristics, motor power could
be modified. Contact Salmson Customer Services if needed.
- Close the coupling guards by screwing all screws provided with
the pump.

7.5 Electrical connection

WARNING! Electrical shock hazard!
Dangers caused by electrical energy must be excluded.
- Electrical work by a qualified electrician only!
- All electrical connections must be performed after the electrical
supply has been switched off and secured against unauthorized
switching.
- For safe installation and operation a proper grounding of the
pump to the power supply's grounding terminals is required.
- Check that operating current, voltage and frequency used com-
ply with motor plating data.
- The pump must be connected to the power supply by a solid cable
equipped with a grounded plug-connection or a main power switch.
- Three-Phase motors must be connected to an approved motor
starter. The set nominal current must correspond to the electrical
data on the pump motor name plate.
- The supply cable must be laid so that it never touches the
pipework and/or the pump and motor casing.
- The pump/installation should be grounded in compliance with
local regulations. A ground fault interrupter can be used as extra
protection.
- The connection to the network must be in accordance with the
connection plan (FIG. 5).

7.6 Operation with frequency converter

- Motors used can be connected to a frequency converter in order
to adapt pump performance to duty point.
- The converter must not generate voltage peaks at motor terminals
higher than 850V and dU/dt slope higher than 2500 V/μs.
- In case of higher value, an appropriate filter must be used : con-
tact converter manufacturer for this filter definition and selection.
- Strictly follow instructions provided by the converter manufacturer
data sheet for installation.
- Minimum variable speed should not be set below 40% of pump
nominal speed.
8. START UP
8.1 System filling - Venting
CAUTION! Possible damage of the pump!
Never operate the pump dry. The system must be filled
before starting the pump.
8.1.1 Air evacuation process – Pump with sufficient supply pressure
(FIG. 3)
- Close the two guard valves (2, 3).
- Unscrew the air bleed screw from filling plug (6a).
- Slowly open the guard valve on the suction side (2).
- Retighten the air-bleed screw when air escapes at the air bleed
screw and the pumped liquid flows (6a).
WARNING! When the pumped liquid is hot and the pressure
high, the stream escaping at the air bleed screw may cause
burns or other injuries.
- Open the guard valve on the suction side completely (2).
- Start the pump and check if direction of rotation matches the one
printed on pump plating.
CAUTION! A wrong direction of rotation will cause bad
pump performances and possibly coupling damage.
- Open the guard valve on the discharge side (3).
8.1.2 Air evacuation process – Pump in suction (FIG. 2)
- Close the guard valve on the discharge side (3). Open the guard
valve on the suction side (2).
- Remove the filling plug (6b).
- Open the drain-priming plug not completely (5b).
- Fill the pump and the suction pipe with water.
- Make sure that there is no air in the pump and in the suction pipe:
refilling until complete removal of air is required.
- Close the filling plug with air bleed screw (6b).
- Start the pump and check if direction of rotation matches the
one printed on pump plating.
CAUTION! A wrong direction of rotation will cause bad
pump performances and possibly coupling damage.
- Open the guard valve on the discharge side a little (3).
- Unscrew the air bleed screw from filling plug for air venting (6a).
- Retighten the air-bleed screw when air escapes at the air bleed
screw and the pumped liquid flows.
WARNING! When the pumped liquid is hot and the pressure
high, the stream escaping at the air bleed screw may cause
burns or other injuries.
- Open the guard valve on the discharge side completely (3).
- Close the drain-priming plug (5a).
8.2 Starting up
CAUTION! The pump must not operate at zero flow (closed
discharge valve).
DANGER! Risk of injury!
When the pump runs, coupling guards must be in place,
tightened with all appropriate screws.
WARNING! Important noise!
Noise emitted by most powerful pumps could be very high:
protection must be used in case of long stay close to the
pump.
WARNING! Installation must be designed in order that no
one could be hurt in case of fluid leakage (mechanical seal
failure...).
9. MAINTENANCE - SERVICE
All servicing should be performed by an authorized service repre-
sentative!
WARNING! Electrical shock hazard!
Dangers caused by electrical energy must be excluded.
All electrical work must be performed after the electrical
supply has been switched off and secured against unautho-
rized switching.
WARNING! Risk of scalding!
At high water temperatures and system pressure close isolat-
ing valves before and after the pump. First, allow pump to
cool down.
- These pumps are maintenance free.
- Optionally, the mechanical seal for certain models can be
replaced easily thanks to its cartridge design. Insert its adjusting
wedge in its housing (FIG. 6) once mechanical seal position is set.
- For pumps equipped with one grease feeder (FIG. 7 - pos. 1), res-
pect lubrication frequences mentioned on sticker glued on lan-
tern part (2).
- Always keep the pump perfectly clean.
- Pumps which are not being used during periods of frost should be
drained to avoid damage: Close the guard valves, open com-
pletely the drain-priming plug and the air bleed screw.
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