Daikin EWYD360BZSL handleiding
Handleiding
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standard prepurge procedure), it is kept running for 120 seconds in cooling mode and than is
switched off without pumpdown, the four-way valve is energized 5 seconds after the compressor
has been switched off, than the compressor is switched on after the minimum time compressor off
is expired.
6.13.2.
Switching from heating modes to cooling modes
6.13.2.1. Compressor running in heating mode
A compressor running in heating mode (four-way valve energized) is switched off without
executing pumpdown, the four-way valve is de-energized 5 seconds after the compressor has been
switched off, than the compressor is switched on after the minimum time compressor off is expired
and the standard prepurge procedure is executed.
6.13.2.2. Compressor stopped in heating mode
If a compressor that was stopped in heating mode (four-way valve energized) is required to
start than then four-way valve is de-energized and the compressor is switched on after the 20 sec.
6.13.3.
Additional consideration
The previous procedures relay on the fact that the cooling or heating state is a property of
the compressor regardless the fact it is switched on or off. This meanings that, if a compressor is
switched of in heating mode its four-way valve remains energized (at the same manner a
compressor switched off in cooling mode has the four-way valve de-energized).
If the unit power is removed the four-way valves are automatically de-energized (it is an
hardware characteristic of the valves); this meanings that also compressors switched off in heating
mode goes in cooling mode. So the heating mode of each compressor is reset if the unit power is
removed.
6.14. Defrost procedure
In units configured as heat pumps running in heating mode a defrost procedure are
executed.
Two compressors will not execute the defrost procedure at the same time.
A compressor will not execute the defrost procedure unless an adjustable timer (default 30
min) is expired since its startup and will not execute two defrost time before another adjustable
timer (default 30 min) is expired (if this is required a warning message are generated).
The defrost procedure are based on the measure of ambient temperature (Ta) and the
suction temperature measure by the defrost sensors (Ts). When the Ts remains below Ta by an
amount greater than a value, depending from ambient temperature and coil design, for a time longer
than an adjustable (default 5 min) value the defrost will start.
The formula to evaluate needs for defrost is:
Ts < 0.7×Ta –
∆
T & Ssh < 10 °C (adjustable value)
Where
∆
T is the adjustable coil design approach (default=12°C) and Ssh is the suction
superheat.
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Productinformatie
| Merk | Daikin |
| Model | EWYD360BZSL |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10110 MB |
