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Daikin EWLD420I-SS [20/36] Water charge flow and quality
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Water charge, flow and quality
Once Flow
Circulating water
Supply water
(4)
Flowing water Circulating water
Supply water
(4)
Circulating water
Supply water
(4)
Circulating water
Supply water
(4)
[Below 20°C] [20°C ~ 60°C] [60°C ~ 80°C]
pH at 25°C 6.5 ~ 8.2 6.0 ~ 8.0 6.0 ~ 8.0 6.0 ~ 8.0 6.0 ~ 8.0 7.0 ~ 8.0 7.0 ~ 8.0 7.0 ~ 8.0 7.0 ~ 8.0 Corrosion + Scale
Electrical conductivity [mS/m] at 25°C Below 80 Below 30 Below 40 Below 40 Below 30 Below 30 Below 30 Below 30 Below 30 Corrosion + Scale
(µS/cm) at 25°C (Below 800) (Below 300) (Below 400) (Below 400) (Below 300) (Below 300) (Below 300) (Below 300) (Below 300) Corrosion + Scale
Chloride ion
[mgCl
2-
/l]
Below 200 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Below 30 Below 30 Corrosion
Sulfate ion
[mgSO
2-
4
/l]
Below 200 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Below 30 Below 30 Corrosion
M-alkalinity (pH4.8)
[mgCaCO
3
/l]
Below 100 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Scale
Total hardness
[mgCaCO
3
/l]
Below 200 Below 70 Below 70 Below 70 Below 70 Below 70 Below 70 Below 70 Below 70 Scale
Calcium harness
[mgCaCO
3
/l]
Below 150 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Below 50 Scale
Silca ion
[mgSiO
2
/l]
Below 50 Below 30 Below 30 Below 30 Below 30 Below 30 Below 30 Below 30 Below 30 Scale
Iron [mgFe/l] Below 1.0 Below 0.3 Below 1.0 Below 1.0 Below 0.3 Below 1.0 Below 0.3 Below 1.0 Below 0.3 Corrosion + Scale
Copper [mgCu/l] Below 0.3 Below 0.1 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 0.1 Below 1.0 Below 0.1 Corrosion
Sulfite ion
[mgS
2-
/l]
Not detectable Not detectable Not detectable Not detectable Not detectable Not detectable Not detectable Not detectable Not detectable Corrosion
Ammonium ion
[mgNH
+
4
/l]
Below 1.0 Below 0.1 Below 1.0 Below 1.0 Below 0.1 Below 0.3 Below 0.1 Below 0.1 Below 0.1 Corrosion
Remaining chloride [mgCL/l] Below 0.3 Below 0.3 Below 0.3 Below 0.3 Below 0.3 Below 0.25 Below 0.3 Below 0.1 Below 0.3 Corrosion
Free carbide
[mgCO
2
/l]
Below 4.0 Below 4.0 Below 4.0 Below 4.0 Below 4.0 Below 0.4 Below 4.0 Below 0.4 Below 4.0 Corrosion
6.0 ~ 7.0 --- --- --- --- --- --- --- --- Corrosion + Scale
Items to be referred to Items to be controlled:
Items
(1) (5)
Low temperature
Stability index
Heated water
(2)
Tendency if out of criteria
Circulating System
Cooling Water
Cooled Water
High temperature
Содержание
- Code requirements safety and observant of laws directives 3
- Features and advantages 3
- Infinitely capacity control 3
- Seasonal quietness 3
- Certifications 4
- Sound configuration 4
- Versions 4
- Cabinet and structure 5
- Ecological hfc 134a refrigerant 5
- Electronic expansion valve 5
- Evaporator 5
- General characteristics 5
- Refrigerant circuit 5
- Screw compressors 5
- Control section main features 6
- Electrical control panel 6
- Safety device logic for each refrigerant circuit 6
- Chiller sequencing 7
- Digital sequencing panel 7
- Microtech iii 7
- Microtech iii remote control 7
- Regulation type 7
- Serial sequencing panel 7
- Supervising systems on request 7
- System security 7
- Options on request 8
- Standard accessories supplied on basic unit 8
- Nomenclature 9
- Technical specifications 10
- Ewld i ss 17
- Sound levels 17
- Sound pressure levels correction for different distances 17
- Ewld i ss 18
- Operating limits 18
- Table 1 evaporator minimum and maximum water 18
- Table 2 evaporator fouling factors 18
- Table 3 minimum glycol percentage for low air temperature 18
- Table 3 minimum glycol percentage for low water temperature 18
- How to use the correction factors proposed in the previous tables 19
- Table 4 correction factors for low evaporator leaving water temperature 19
- Table 5 correction factors for water and glycol mixture 19
- Water charge flow and quality 20
- Water content in cooling circuits 21
- Ewld i ss 22
- Notes 1 cc cooling capacity 2 pi unit power input 3 hr heat rejection 4 elwt evaporator leaving water temperature δt 5 c 5 data refers to 0 0176 m2 c kw evaporator fouling factor 22
- Standard ratings 22
- Notes 6 cc cooling capacity 7 pi unit power input 8 hr heat rejection 9 elwt evaporator leaving water temperature δt 5 c 10 data refers to 0 0176 m2 c kw evaporator fouling factor 23
- Notes 11 cc cooling capacity 12 pi unit power input 13 hr heat rejection 14 elwt evaporator leaving water temperature δt 5 c 15 data refers to 0 0176 m2 c kw evaporator fouling factor 24
- 91 l s 25
- Evaporator and condenser pressure drops 25
- Ewld i ss 25
- How to use the formula example evaporator 25
- Pd2 kpa pd1 kpa x where pd2 pressure drop to be determinated kpa pd1 pressure drop at nominal condition kpa q2 water flow at new working condition l s q1 water flow at nominal condition l s 25
- The unit ewld320i ss has been selected for working at the following conditions evaporator water in out 11 6 c saturated discharge temperature 40 c the cooling capacity at these working conditions is 333 kw the evaporator water flow at these working conditions is 15 1 l s the unit ewld320i ss at nominal working conditions has the following data evaporator water in out 12 7 c saturated discharge temperature 45 c the cooling capacity at these working conditions is 328 kw the evaporator water flow at these working conditions is 15 7 l s the evaporator pressure drop at these working conditions is 34 kpa the evaporator pressure drop at the selected working condition will be pd2 kpa 34 kpa x pd2 kpa 35 kpa note if the calculated evaporator water pressure drop is below 10 kpa or above 100 kpa please contact the factory for dedicated evaporator 25
- To determinate the evaporator or condenser pressure drop for different versions or at different working condition please refer to the following formula 25
- Dimensions 26
- Handling 29
- Installation notes 29
- Location 29
- Minimum clearance requirements for machine maintenance 29
- Minimum space requirements 29
- Warning 29
- Dimensions 30
- General 30
- Noise level and vibrations 30
- Performance 30
- Refrigerant 30
- Technical specification for water cooled screw chiller 30
- Unit description 30
- Chiller components 31
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