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Installation
Connect the Power Supply
1. MAINS SUPPLY VOLTAGES (220-240 V AC) ARE PRESENT IN THIS EQUIPMENT, WHICH MAY
CAUSE DEATH OR SERIOUS INJURY BY ELECTRIC SHOCK. ONLY A SUITABLY QUALIFIED PERSON
SHOULD CONNECT THE POWER SUPPLY TO THIS UNIT.
2. THIS UNIT MUST BE CORRECTLY EARTHED.
This unit is designed for operation from a single-phase alternating current source (220-240 VAC).
A 1.5m cable is connected internally to the unit for connection to an isolator switch.
To connect the power supply:
Ensure the local AC power supply is switched off.
One end of the power cable supplied is already connected to the unit in the manner shown above.
Connect the other end of the cable to the switched fused spur.
Use cable clamps and clips to secure the cable, as appropriate.
Connecting a Boost (Light) Switch
A Switched Live (LS1) may be used to boost the airflow when a light is turned on, for instance in a
bathroom or kitchen. If the LS1 core of the mains cable is not used it should be terminated in an
appropriate manner.
If the unit and the LS1 connection are on the same circuit, the jumper should be left between N and NS1
as shown above.
Connecting a Boost (Light) Switch from a different circuit
If the supply used for the Switched Live (LS) is on a different circuit to the power connections, the
connections LS1 and NS1 should both be connected to the same circuit. LS1 and NS1 are connected to
the unit via a built in isolator and a separate isolating relay is not needed. The factory fitted link wire should
be removed.
28
WARNINGS
MVHR Installation and User Guide 476930
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