salmson NSB Series, Installation And Starting Instructions

Page: 9 / 16

9
5.3. Electrical connection
The electrical connection must be made by a
qualified electrician and comply with applicable
local standards.
Complete electrical information about the circulator is
given on the data plate.
Power supply network
Use a three-conductor cable (3 x 1,5 mm
2
H05 VVF) to
connect mains power to the corresponding terminals
of the circulator: phase (L), neutral (N), and earth ( )
( see FIG. 5 ).
The power cable must not touch the pipe or the
pump; make sure that it is away from any
moisture.
Check line protection and the mains voltage and
frequency.
The circulator must be connected to the mains via a
switch with an opening distance, on each pole, of at
least 3 mm. The power outlet must have an earthing
contact.
The motors of the circulators NSB..-..B and DSB..-..B are
self protected by impedance, therefore they don’t
need external protection.
After making the electrical connections, put the cover
back on the terminal box.
6. STARTING UP
6.1. Filling, degassing
Never operate the circulator WITHOUT
WATER.
- Open the valves on both sides of the circulator and
completely fill the loop.
- Bleed the circuit at the high point.
- Bleed air from the circuit by hand by unscrewing the
plug a few turns ( see FIG. 6 ).
Risks of scald. Pressure be high.
- Screw back in when water runs out and there are no
more air bubbles.
- Power up the motor to start the circulator.
- The circulator flowrate is adjusted by changing the
speed of rotation of the motor using the selector
switch ( see FIG. 5 ) (except NSB 05-15B).
Risk of burning. In operation, the motor casing
may be hotter than 60°C.
7. SERVICING
The circulator needs no special servicing in operation.
The motor bushings are self-lubricating.
After a prolonged shutdown, make sure that the
circulator turns freely.
A regular permutation’s motors is better for the
maintenance of liquid flowing in the bypass orifice of
DSB used for transport a clear water.
ATTENTION !
TROUBLES
8.1THE CIRCULATOR
IS NOISY
8.2THE CIRCULATOR
FAILS TO START
CAUSES
a) Air in circulator:
b) The suction pressure is too
low:
c) Considerable flowing
water noise:
d) Foreign bodies in impeller
or in the re-flowing orifice
and the pump casing:
a) Shaft stalled by fouling
after a prolonged
shutdown:
b) No power supply to
circulator:
c) Capacitor defective:
d) Foreign bodies in impeller:
REMÈDIES
a) Bleed the circulator: loosen the rear plug; continue until
there are no more air bubbles, then screw the plug back in
( see FIG. 6) .
b) Raise the pressure in the circuit.
c) Consider a slower speed.
d) Remove the motor and clean the impeller and the pump
casing.
a) Free the shaft: remove the rear plug. Use a flat-bladed
screwdriver to turn the motor shaft. Then reinsert the rear
plug ( see FIG. 7 ).
b) Check that the motor is connected.
Check the fuses of the installation.
c) Replace it; the characteristics are indicated on the rear
data plate (µFV). For changing the condensator, lift-up the
fixing clip of the condensator’s wires ( see FIG. 5 - item A ).
For removing the wires, insert the nex condensator wires
then press the clip for locking.
d) Remove the motor and clean the impeller.
8. OPERATING TROUBLE
Switch the circulator OFF before doing any
work on it.
ENGLISH