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Filling and venting the system
Buffer vent
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Fill the central heating side though the filling loop in the VVM320
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Vent the hot water coil via the coil vent
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Vent the buffer via the buffer vent
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Vent all high points on pipework
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Pressurise the system to the required cold fill pressure (typically 1-1.5 bar).
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The hot water cylinder must be filled prior to turn on.
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The cylinder is filled via the cold-water supply as any standard cylinder.
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Ensure under floor heating/radiators are filled and vented correctly.
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There should be no gurgling sounds from the system.
Coil vent
NB. The Outdoor Unit Must be powered up a minimum of 6 hours before the indoor unit.
