Electrical Connection - Baxi MS UNIVERSALE+ Instructions D'installation

4.3. ADJUSTING THE SELF-MODULATING PUMPS
The self-modulating pumps have a knob for
enabling and disabling all the functions, and a
LED indicator around the same knob. The dia-
gnostics and meaning of the light signals of the
LED are indicated in the table below.
Turn the knob to (DP-v), and the pump
regulates the speed by adjusting the DP accor-
ding to the pressure loss of the system. This
adjustment is recommended for heating sy-
stems with radiators.
Turn the knob to (DP-c), and the pump
regulates the speed while keeping the DP con-
stant in relation to the pressure loss of the system. This adjustment is recommended for floor heating systems.
Turn the knob to to enable the aeration function for eliminating air in the heating system. This function takes 10
minutes. The pump then stops and enters stand-by mode, as indicated by the flashing green LED as described in the
table below.
Colour of LED
Steady GREEN Normal operation.
Operation in degassing
mode:
Blinking GREEN
Faulty operation (the pump
Blinking
starts but stops again
RED/GREEN
immediately).
The pump does not start
Blinking RED
(e.g. it is blocked)
No LED lights The pump is not powered.
The MS UNIVERSALE+ must be electrically
connected to a 230V~ single-phase power
mains with earth by means of the three-core
cable provided.
Make the connection with a two-pole switch
(the same one that feeds the boiler), with a
contact separation of at least 3 mm. When re-
placing the power supply cable, fit a harmoni-
sed "HAR H05 VV-F" 3x0.75 mm2 cable with
a maximum diameter of 8 mm.
Note: the electric power supply may be turned
off by pressing the switch on the front (the light
in the switch will go off. See Figure 3).
INSTALLATION INSTRUCTIONS
Meaning Diagnostics
The pump runs correctly.
The pumps runs for 10
minutes in degassing mode,
during which time the
installer regulates the flow
of water in relation to the
pressure drop of the plant.
The pump restarts automa-
tically as soon as the cause
is resolved.
Reset the pump. Check
the LED.
There is no current at the
terminals of the pump.

5. ELECTRICAL CONNECTION

Figure 3
22
Degassing the system
1 1
4
7
p-v (variable)
Fault
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1) Input voltage too low/ 1) Check the supply volta-
high: <160V / >280V. ge value.
2) Overtemperature (°C): 2) Check the temperature
the pump is overheated. of the water and/or room.
The pump cannot restart
automatically due to a Replace the pump.
permanent fault.
1) The pump is not con- 1) Check the electrical con-
nected to the mains power nections of the wiring.
supply. 2) Check whether the pump
2) The LEDs are damaged. is turned on.
3) The electronics of the 3) Replace the pump.
pump are damaged.
ON/OFF switch
4
Red/green LED
(diagnostics)
7
p-c (constant)
Solution
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7225991.02 - en