Hydraulic Connections; Electrical Connections - salmson MUV Instalacion Y Puesta En Servicio

ENGLISH
Bear in mind that the altitude of the installation
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suction head of the pump.
ltitude Loss of head
0 m 0 mCL
500 m 0,60 mCL
1000 m 1,15 mCL
1500 m 1,70 mCL
2000 m 2,20 mCL
2500 m 2,65 mCL
3000 m 3,20 mCL
When the conveyed fluid is above 80°C, plan to
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install the pump under pressure.

5.2 Hydraulic connections

By threaded tubes to screw directly on the oval tapped counter-
flanges delivered with the pump.
The diameter of the pipe must never be smaller than the one of the
counterflange.
The circulation sense of the fluid is indicated on the identification
label of the pump.
Limit the length of the suction pipe and avoid all features that cause
losses of head (bends, valves, tapers).
Connections has to correctly sealed: No air entrance is allowed on the
suction pipe which is showing a mounting declivity (2 %) (see fig. 1).
Use supports or collars so that the pump does not bear the weight of
the pipes.
Connect the non-return valve to the pump discharge to protect it
from hammer blow effects.
Note : To pump water with a large content of air or hot water, we
recommend installing the by-pass kit.

5.3 Electrical connections

The electrical connections and the inspections have to be
done by a qualified electrician and comply with the appli-
cable local standards.
The electrical characteristics (frequency, voltage, nominal current) of
the motor are mentionned on the name plate : check if it complies
with the mains supply used.
The motors must be protected by a circuit-breaker set to the current
mentionned on the name plate of the motor.
Provide a fuse disconnecting switch (type aM) to protect the mains
supply.
Supply network :
- Use an electrical cable conforming with the National Electric
Supply Company.
- Three-phase : 4 conductors (3 phases + earth).
If necessary, cut an opening in the terminal box, fit the cable gland
stuffing box and connect the motor as shown by the diagram inside
the cover of the terminal box (or see fig. 4).
DO NOT FORGET TO CONNECT TO E RTH.
connection error would damage the motor. The power cable
must never touch the pipe or the pump; make sure that it is shelte-
red from any humidity.
The electric motors used on the pumps can be connected to a fre-
quency converter. Strictly follow the instructions given by the data
sheet of the converter's manufacturer.
The converter must not generate voltage peaks at the motor termi-
nals higher than 850 V and dU/dt (Voltage/Time variation) higher
Temperature Loss of head
20 °C 0,20 mCL
30 °C 0,40 mCL
40 °C 0,70 mCL
50 °C 1,20 mCL
60 °C 1,90 mCL
70 °C 3,10 mCL
80 °C 4,70 mCL
90 °C 7,10 mCL
100 °C 10,30 mCL
than 2500 V/µs. If the value of the voltage signal are higher than
those, risk of damage the motor are to forecast.
In the contrary provide a LC filter (inductance – capacitor) between
the converter and the motor. It must be connected to the motor with
a minimum length cable, armoured if necessary.
DO NOT FORGET TO CONNECT TO E RTH.
6. ST RTING UP
6.1 Prior cleaning
n hydraulic test is carried out for each pump in our factory.
If some water stays inside them. It is recommended for
hygien reasons to clean the pump before using it with
potable water supply.
6.2 Filling - degassing
Never operate the pump dry,
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even briefly.
Pump under pressure (see fig. 2)
- Close the discharge valve (3),
- Open the venting plug (5), and the suction valve (2) and comple-
tely fill the pump.
Close the venting plug only after water flows out and complete air exit.
In hot water, a stream of water may escape from the venting
port. Take all required precautions as regards persons and
motor.
Pump in suction : Two possible cases.
1st case (see fig. 5.1) :
- Close the discharge valve (3), open the suction valve (2)
- Remove the venting plug (5)
- Unscrew the bottom drain-priming plug (6) located on the pump
casing 4 to 5 turns.
- Put a funnel into the venting plug port and completely fill the pump
and the suction pipe.
- fter water flows out and total air exit, filling is complete.
- Screw the venting plug and the bottom drain-priming plug back in.
2nd case (see fig. 5.2) :
Filling can be made easier by fitting on the suction pipe of the pump,
a vertical pipe fitted with a Ø 1/2 stopcock and a funnel.
The length of the pipe must be at least 50 mm tal-
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ler than the venting level.
- Close the discharge valve (3), open the suction valve (2).
- Open the stopcock and the venting plug.
- Unscrew 4 to 5 turns the drain-priming plug (6).
- Fill the pump and the suction pipe completely until water flows out
of the venting plug (5).
- Close the stopcock (which can be left in place), remove the pipe and
close the bleed device (5) and screw again the drain-priming plug (6).
Dry-running protection
To ensure that the pump is always primed, we recommend to protect
it with a pressure switch or a float switch.
6.3 Check the motor sense of rotation
- With an open-end screwdriver placed in the slot of the shaft on fan
side, make sure that the pump turns freely without sticking.
THREE-PH SE MOTOR
- Switch on the motor by short pressing on the motor-overload relea-
se and check that it turns in the direction indicated by the arrow
located on the identification label of the pump.
- In the opposite case and if the motor had three phase, cross two
phase wires on motor terminal block or on the switch.
SINGLE PH SE MOTOR :
The single-phase motors and motors variatiors are designed for ope-
rating in the correct sense of rotation.
The sense of rotation is adjusted when assembling the product and is
independent from the network connection.
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