Daikin EWADC19C-SR [50/96] Operating limits
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Daikin EWADC19C-SR [50/96] Operating limits

Daikin EWADH14C-XS [50/96] Operating limits
50
Water charge, flow and quality
OPERATING LIMITS
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 6.8 - 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 80 Below 80 Below 30 Below 30 Below 30 Below 30 Corrosion + Scale
(µS/cm) at 25°C (Below 800) (Below 300) (Below 400) (Below 800) (Below 800) (Below 300) (Below 300) (Below 300) (Below 300) Corrosion + Scale
Chloride ion
[mgCl
2-
/l]
Below 200 Below 50 Below 50 Below 200 Below 50 Below 50 Below 50 Below 30 Below 30 Corrosion
Sulfate ion [mgSO
2-
4
/l] Below 200 Below 50 Below 50 Below 200 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 100 Below 50 Below 50 Below 50 Below 50 Below 50 Scale
Total hardness [mgCaCO
3
/l] Below 200 Below 70 Below 70 Below 200 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
Oxygen (mg O2 /l) Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Corrosion
Particole size (mm) Below 0.5 Below 0.5 Below 0.5 Below 0.5 Below 0.6 Below 0.5 Below 0.6 Below 0.5 Below 0.6 Erosion
Total dissolved solids (mg / l) Below 1000 Below 1000 Below 1000 Below 1000 Below 1001 Below 1000 Below 1001 Below 1000 Below 1001 Erosion
Ethykene, Propylene Glycol (weight conc.) Below 60% Below 60% --- Below 60% Below 60% Below 60% Below 60% Below 60% Below 60% --
Nitrate ion (mg NO3- /l) Below 100 Below 100 Below 100 Below 100 Below 101 Below 100 Below 101 Below 100 Below 101 Corrosion
TOC Total organic carbon
(mg /l) Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 Below 1.0 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
1 Names, definitions and units are according to JIS K 0101. Units and figures between brackets are old units published as reference only.
2 In case of using heated water (more than 40°C), corrosion is generally noticeable.
Especially when the iron materials is in direct contact with water without any protection shields, it is desireable to give the valid measure for corrosion. E.g. chemical measure
3 In the cooling water using hermetic cooling tower, close circuit water is according to heated water standard, and scattered water is according to cooling water standard.
4 Supply water is considered drink water, industrial water and ground water except for genuine water, neutral water and soft water.
5 The above mentioned items are representable items in corrosion and scale cases.
6 The limits above have to be considered as a general prescription and con not totallu assure the absence of corrossion and erosion.
Some particular combinations of elements or the presence of components not listed in the table or factors not considered may trigger corrosion phenomena.
Tendency if out of criteria
Circulating System
Cooling Water
Cooled Water
Items
(1) (6)
Low temperature
Items to be controlled:Items to be referred to:
Stability index
High temperature
Heated water
(2)

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