Handleiding
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EWYT016-CZ
The charts shown above constitute a guideline on operating limits in the range.
Refer to the CSS selection software for the actual operating limits in the working conditions for each
model.
4.12 Operating stability and minimum water content in the system
For the correct functioning of the machines, it is important to guarantee a minimum water content inside the system,
avoiding an excessive number of compressor startups and stops. In fact, every time the compressor starts working, an
excessive amount of oil from the compressor enters the circulation in the refrigerant circuit and at the same time there is
an increase in the temperature of the compressor stator, generated by the inrush current of the starting. To prevent
damage to the compressor, the control system will therefore permit no more than 10 startups per hour. The plant where
the unit is installed must therefore ensure that the overall water content allows constant operation of the unit and
consequently also greater environmental comfort.
4.12.1 Cooling Mode
The chilled water content of the systems should have a minimum water amount to avoid excessive stress (start and
stops) on the compressors.
Design considerations for water volume are the minimum cooling load, the water temperature setpoint differential and
the cycle time for the compressors.
As a general indication, the system water content should not be less than the values deriving from the following
formula:
Single circuit Unit
→ 5
Dual circuit Unit
→ 3,5
kWnominal = Cooling capacity at 12/7°C OAT=35°C
The above rule of thumb derives from the following formula, as the relative volume of water capable of maintaining
the water temperature setpoint differential during the minimum load transient avoiding excessive starts and stops of
the compressor itself (which depends on the compressor technology):
CC = Cooling Capacity
DNCS = Delay to next Compressor Start
FD = Fluid Density
SH = Specific Heat
DT = Water Temperature Setpoint Differential
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Productinformatie
| Merk | Daikin |
| Model | EWAT016CZP |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 9712 MB |
