32
Note:
table valid for set point PSI = 6.0
If set point PSI > 6.0 (6.0+x), please read from PSI
water
- x
COC must be > 1
When bleed-off water flow is more than 1.5 times the evaporated water (COC < 1.66), we recommend DW
water configuration only.
IMPORTANT:
When using softened water, the total hardness cannot be used to determine the bleed-off and COC
calculation.
Multiply the calculated COC for limescale deposit with other important inlet water mineral/microorganism
value and compare with the recommended limit (see tables of pages 19 and 20). If the value above the limit
the COC must be reduced.
Examples:
Conductivity (μS/cm):
inlet
Conductivity × COC
≤ 1000
μS/cm
Chlorides (mg/l):
[Chloride]
inlet
× COC
≤
250 mg/l
Sulphates ( mg/l)
[Sulphate]
inlet
× COC
≤
250 mg/l
Silicates ( mg/l)
[Silicate]
inlet
× COC
≤
150 mg/l
Total colony number
(CFU/ml);
inlet
total colony number
× COC < 1000 CFU/ml
Same calculations for other maximum concentration values .
Conductivity control for bleed-off
To set-up the bleed-off with conductivity control,
the conductivity set point is:
Conductivity set point (μS/cm) = inlet conductivity (μS/cm) x COC
(optional but mandatory for the VDI 6022
compliance).
Draining valve set-up
Draining duration (in s/h) = Bleed-off (in l/h ) / 0.7 (in l/s )
Draining duration (in s/h) = Bleed-off (gallon US/h) / 0.1849 (gallon US/s)
Note: For draining duration set-up, it is recommended to consider the complete basin emptying time to avoid
fresh water waste. When it is possible, we recommend to set-up the draining duration below the half basin
emptying time.
Complete basin emptying timetable
Basin width (mm)
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
Basin width (inch)
20
24
28
31
35
39
43
47
51
55
59
63
67
Water vol. (l)
25
30
34
39
43
47
51
55
58
62
65
69
72
Water vol. (gallons)
6.6
7.9
8.9
10.3
11.3
12.4
13.4
14.5
15.3
16.3
17.1
18.2
19.0
Basin emptying time(s)
36
43
49
56
61
67
73
79
83
89
93
99
103
Basin width (mm)
1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000
Basin width (inch)
71
75
79
83
87
91
94
98
102
106
110
114
118
Water vol. (l)
75
78
80
83
85
88
90
92
94
96
97
99
100
Water vol. (gallons)
19.8
20.6
21.1
21.9
22.4
23.2
23.7
24.3
24.8
25.3
25.6
26.1
26.4
Basin emptying time(s)
107
111
114
119
121
126
129
131
134
137
139
141
143
Conductivity
sensor
Water consumption
Water consumption = Evapo Bleed-off
Содержание EvaPack Series
Страница 46: ...46 Notes...
Страница 47: ...47 Notes...
