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12.1.3. PoSSIBILItY oF DE-ICING WHEN tHE CoMPRESSoR StoP
When the compressor stops, either because the water or the room temperature setpoint has been reached, it is
possible for the
Aqu@ Scop Advance DCI
to force a de-icing sequence.
When the compressor stops, if:
²
time counted down (
D01
) > time limit (
D04
) – 5minutes (therefore default setting = 45 minutes),
it is considered more worthwhile to de-ice straightaway with the hot water in the heating circuit, rather than launching
a de-icing sequence just after compressor restarting.
12.2. ANtICIPAtED DE-ICING
under certain unfavourable outdoor conditions (e.g. freezing fog), it is possible that the
Aqu@ Scop Advance DCI
would need to start an anticipated de-icing sequence.
to start an anticipated de-icing sequence the following conditions are required:
²
entering water temperature > 22°c,
²
outdoor temperature < 10°c,
²
coil temperature < -2°c,
²
time passed > 20 minutes (
Minimum delay
)
outdoor temperature( oat) – coil temperature (oct) > 17°c
therefore, the principle is to anticipate the de-icing sequence when the controller detects an abnormal difference
between the outdoor temperature and the coil temperature, while respecting a compressor operating time of at
least 20 minutes.
