Daikin EUW KZW1 Series, Руководство по обслуживанию, Страница: 119 / 140

ESIE-0303 Pre-Test Run Checks
Part 4 – Commissioning and Test Run 4–7
3
4
5
1
Water quality The table below contains the required water quality specifications.
Evaporator water Heated water (low temperature)
Tendency if out of
criteria
Circulating
water (< 20°C) Supply water Circulating water
(20°C-60°C) Supply water
Items to be checked
pH at 25°C 6.8~8.0 6.8~8.0 7.0~8.0 7.0~8.0 Cor scale
Electrical conductivity mS/m
(at 25°C) < 40 < 30 < 30 < 30 Cor scale
Chloride ion
mg Cl
-
/l
< 50 < 50 < 50 < 50 Corrosion
Sulphate ion
mg SO
4
2-
/l
< 50 < 50 < 50 < 50 Corrosion
M-alkalinity (pH 4.8) mg CaCO
3
/l < 50 < 50 < 50 < 50 Scale
Total hardness mg CaCO
3
/l < 70 < 70 < 70 < 70 Scale
Calcium hardness mg CaCO
3
/l < 50 < 50 < 50 < 50 Scale
Silica ion mg SiO
2
/l < 30 < 30 < 30 < 30 Scale
Items to be referred to
Iron mg Fe/l < 1.0 < 0.3 < 1.0 < 0.3 Cor scale
Copper mg Cu/l < 1.0 < 0.1 < 1.0 < 0.1 Corrosion
Sulphide ion
mg S
2-
/l
Not detectable Not detectable Not detectable Not detectable Corrosion
Ammonium ion
mg NH
4
+
/l
< 1.0 < 0.1 < 0.3 < 0.1 Corrosion
Remaining chloride mg Cl/l < 0.3 < 0.3 < 0.25 < 0.3 Corrosion
Free carbide mg CO
2
/l < 4.0 < 4.0 < 0.4 < 4.0 Corrosion
Stability index – – – – Cor scale