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Electrical Connection of VVM320
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The mains cable is pre-wired in the unit and must be terminated in a local rotary isolator.
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The rotary isolator must be supplied by 6 or 10 Square cable back to the fuse board. (dependant on distance and sized by
the electrician)
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The circuit breaker must be rated for 32 Amps.
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The communication (comms) cable must be screened cat5 or equivalent. It must also be grounded in the outdoor unit
only.
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All sensor cables must be screened cat5 or equivalent.
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The additional relay is a volt free contact used to power the external pump. The power supply for the pump is sourced
externally with the live cable routed through the additional relay (X7) allowing control by the VVM320.
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The outdoor sensor must be positioned on a north/ north west facing surface to avoid direct sunlight interference. Ideally
located under a soffit for water protection. Kept at a serviceable height if possible.
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Install the indoor sensor in a central position. A suitable location is on a free inner wall in a hall approx. 1.5 m above the
floor.
If the room sensor is used in a room with underfloor heating, it should only have an indicatory function, not control
of the room temperature.
