SINGLE SCREW CHILLERS IMM
34
Engineered for Flexibility and Performance
11. Operating range
11.1 Standard Operating Environment
The standard operating environment of the single-screw chiller is as follows:
Voltage:
380V
Voltage fluctuation range:
rated voltage ±10%
Phase voltage unbalance rate:
± 2%
Frequency:
rated frequency±2%
Operating ambient temperature:
3-40°C (i.e. the ambient temperature of the
chiller installation space)
Relative humidity:
≤90%, without condensation water.
Altitude:
<1000m (When star delta starter device
adopted, the max altitude height allowed is
2000m. Ultrahigh altitude will influence the
electrical insulation and electric conductivity
and measures shall be taken to protect the
chiller)
Explosion-proof grade:
None
Pollution grade:
3
The corrosive gas composition in the atmosphere:
Concentrations of sulfur dioxide:
≤10 mg/m
3
Concentrations of Hydrogen fluoride:
≤5 mg/m
3
Concentrations of Hydrogen sulfide:
≤5 mg/m
3
Concentrations of Nitrogen oxide:
≤5 mg/m
3
Concentrations of Chloride:
≤1 mg/m
3
Concentrations of Hydrogen chloride:
≤5 mg/m
3
Installation: indoor installation without direct exposure to the rain and the sun (if it shall be
installed outdoor or in the such atmospheric environments with high concentration of
corrosive gas as seaside or chemical plant, please contact the local Daikin branch office
and dealers)
11.2 Minimum Retaining Water Capacity of System
The minimum retaining water of chilled water system shall be larger than 5360L (under
GB conditions) to prevent the frequent start and stop of the chiller. Please refer to
6.2
Piping Engineering,
if the working conditions of customer are different from the GB
conditions.
11.3 Water Quality for chiller
The quality of chilled water and cooling water has direct impact on the performance and
service life of the chiller. Thus, the water quality shall be investigated in advance, and the
management of water quality shall be valued.
Notes: The water evaporation makes the open-type circulating water concentrate.
