Airwell Aqu@Scop ADV 006, Руководство по регулировке

Страница: 31 / 48

29
12.3. DEICE SEqUENCE
two different sequences are possible, with a compressor stop before and after deice and without a compressor stop.
the deice with a compressor stop is only available with V2XX software and must be used with the second generation
compressor driver available on the
Aqu@ Scop Advance DCI 12 and 16 units. on other units it is possible to
activate the compressor stop.
² d06 = on compressors stops before and after deice
²
d06 = oFF compressor does not stop
Sequence without a compressor stop:
1. changeover valve switches to deice position.
2. electronic expansion valve opens
3. compressor increases speed to 80hz
4. When the oct>4°c the compressor speed reduces.
5. When oct > 16°c the fans start.
6. after 10s the changeover valve switches back to heating.
7. the compressor is forced to stay at 60 hz for 20s before increasing speed back to 80hz
Sequence with a compressor stop:
1. compressor switches off
2. electronic expansion valves opens
3. changeover valve switches to deice position.
4. compressor starts and increases speed to 80hz
5. When the oct>4°c the compressor speed reduces.
6. When oct > 16°c the fans start.
7. compressor stops.
8. after 10s the changeover valve switches back to heating.
9. the compressor starts and remains at 50hz for 20s before increasing speed back to 80hz.
the normal condition for an end to the de-icing sequence is the coil temperature above 16°c. however, other
"abnormal" conditions may stop the de-icing cycle:
² de-icing time too long, longer than 10 minutes. the alarm al 22 is for information purposes only
and automatically disappears after 2 minutes.
² leaving water temperature < 10°c, risk of the plate exchanger freezing. Just as the alarm al 22, the
alarm al 23 will disappear automatically after 2 minutes.
Action should be taken if these two de-icing malfunctions occur repeatedly. Care must
be taken to ensure that the Aqu@ Scop Advance DCI de-ices correctly (correct water
flow, no obstruction of the airflow over the outdoor coil…).
during de-icing, a pressostat manages the restarting of the upper fan in order to control the condensing pressure.
When the latter is too high (around 33 bars), the fan starts until the pressure is lowered sufficiently. the fan then stops.
apart from the coil temperature condition, excessively long de-icing or too cold leaving water,
the alarms such as water flow interruption can also stop the de-icing sequence. however, if the
Aqu@ Scop Advance DCI is already in a de-icing sequence, switching the system off via Main
oFF will not stop it and the de-icing will continue right until the end of the cycle.