Stuart Turner Stuart SPU 130 Mini Installation, Operation & Maintenance Instructions Manual page 15

5.21 Wiring of connection unit:
WARNING: This appliance must be earthed.
The wires in the mains lead (supply cord) are coloured in accordance with the
following code:
Green and Yellow: Earth
Blue: Neutral
Brown: Live
As the colours of the wires in the mains lead of this appliance may not
correspond with the coloured markings identifying the terminals in your
connection unit proceed as follows:
The wire which is coloured green and yellow must be connected to the
z
terminal in the connection unit which is marked with the letter E or by the
earth symbol:
The wire which is coloured blue must be connected to the terminal which
z
is marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the terminal
z
which is marked with the letter L or coloured red.
5.22 Boiler interlock safety function:
The SPU Mini is fitted with a single volt free contact specifically assigned for
boiler/chiller shut down in the event that the SPU Mini detects system
pressure above the Hi alarm pressure or below the Lo alarm pressure.
The boiler interlock contact will be open circuit below the Lo alarm pressure
and above the Hi alarm pressure.
When the system pressure is in its normal operating pressure range (above Lo
alarm pressure and below Hi alarm pressure settings) the contact is
closed circuit
Always refer to the boiler/chiller manufacturer's instructions for correct
integration.
or coloured green or green and yellow.
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