Electrical Connection - almson NXL Instalacion Y Puesta En Servicio

ENGLISH

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 mm2 H05 VVF) to
connect mains power to the corresponding terminals
of the circulator: phase (L), neutral (N), and earth ( )
(see FIG. 4).
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.
After making the 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
fill the installation completely.
- Bleed the circuit at the high point.
- Bleed air from the circuit by hand by unscrewing the
plug (see FIG. 5) a few turns; close it when water runs
out and when there are no more air bubbles.
Risks of scald. Use a screw-driver for
ATTENTION !
unscrewing the tap.
- Power up the motor to start the circulator.
- The flowrate is adjusted by changing the speed of
rotation of the motor using the selector switch.
Risk of burning. In operation, the motor
ATTENTION !
casing may be hotter than 100°C.
7. SERVICING
The circulator needs no special servicing in operation.
The motor bushings are lubricated by the liquid
pumped.
At the beginning of each heating season, or after a
prolonged shutdown, make sure that the circulator
turns freely.
8. OPERATING TROUBLE
CAUSES AND REMEDIES
Switch the circulator OFF before doing
ATTENTION !
any work on it.
8.1. The circulator is noisy
a) Air in circulator
- Bleed the circulator: loosen the rear plug; continue
until there are no more air bubbles, then screw the
plug back in.
b) The suction pressure is too low
- Raise the pressure in the circuit.
c) Considerable flowing water noise
- Consider a slower speed.
d) Foreign bodies in impeller
- Remove the motor and clean the impeller.
8.2. The circulator fails to start
a) Shaft stalled by fouling after a prolonged shutdown
- Free the shaft: remove the rear plug. Use a flat-
bladed screwdriver to turn the motor shaft. Then
reinsert the rear plug (see FIG. 6). Or operate the
unjamming plug device (if one is fitted) by pushing
on its centre with a screwdriver.
b) No power supply to circulator
- Check that the motor is connected.
- Check the fuses of the installation.
c) Foreign bodies in impeller
- Remove the motor and clean the impeller.
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