Viessmann VITOCAL 300-G Operating Instructions Manual page 59

Appendix
Terminology
(cont.)
Potable water filter
Device that removes solids from the
water. The potable water filter is installed
in the cold water pipe upstream of the
DHW cylinder or the instantaneous
water heater.
Compressor
Central assembly of a heat pump. The
compressor raises the refrigerant to the
temperature level required for the heat-
ing operation.
Weather-compensated heating or
cooling mode
In weather-compensated mode, the flow
temperature is controlled subject to the
outside temperature. This means that no
unnecessary heat or cooling capacity is
generated to heat or cool the rooms to
the set room temperature you selected.
The outside temperature is captured and
transferred to the heat pump control unit
by a sensor fitted outside the building.
DHW circulation pump
The DHW circulation pump transfers the
hot water in a circular line between the
DHW cylinder and the draw-off points
(e.g. hot water tap). This makes hot
water available quickly at the draw-off
point.
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