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WTC 600 LP / MP OPERATION OF THE SYSTEM
Service Handbook 08.2004
3.2.3 Antiscalant
The drinking water for the metering solution is taken from the sampling tap for drinking
water (1/4.21).
The antiscalant metering quantity can be set with a very good approximation using the following
table. The optimum quantity can only be calculated using a calculation program after a precise
water analysis has been carried out. The typical metering range lies between 2 and 5 mg/l.
Where water hardnesses are higher than 28°dH, special design is necessary.
If this design is not possible, the following setting is recommended: 5 mg/l RM5000 and 50%
yield, until the precise design is available.
Range of Water Hardness Antiscalant [mg/l] Metered Run-down
amount of Tank Service
RM 5000 [ml] Life [h]
per 10 l
Metering
Solution
1 (0°-7° dH) 2,5 58 214
2 (7°-14° dH) 3 69 214
3 (14°-21° dH) 4 92 214
4 (21°-28° dH) 5 115 214
Table 10 Metering of antiscalant at 75% yield
Range of Water Hardness Antiscalant [mg/l] Metered Run-down
amount of Tank Service
RM 5000 [ml] Life [h]
per 10 l
Metering
Solution
1 (0°-7° dH) 2,5 87 214
2 (7°-14° dH) 3 104 214
3 (14°-21° dH) 4 138 214
4 (21°-28° dH) 5 173 214
Table 11 Metering of antiscalant at 50% yield
1 °dH = 1,79 °frH
1 °dH = 17,9 mg CaCO3/l
1 °frH = 10,0 mg CaCO3/l