Page 17
Available Head
= Pump Head – System Head
= 20.4 – 3.75 = 16.7 kPa
Note:
5HIHUWRWKH3XPS&XUYHIRUWKHPLQLPXPDQGPD[LPXPZDWHUÀRZUDWHWKDWFDQEHFLUFXODWHG
WKURXJKLQWKHPLQLFKLOOHU/RZZDWHUÀRZFDQUHVXOWSRRUSHUIRUPDQFHZKLOHKLJKZDWHUÀRZ
rate might damage to the components.
Glycol Application
For leaving water temperature at 5°C or below, it is recommended mixing the chilled water with
glycol solution to decrease the freezing point of the chilled water. Glycol correction factors should
be used to adjust the performance.
Example:
Determine capacity and pressure drop for a FVCA40C with 10% glycol solution. Entering water
temperature is 10°C, leaving water temperature is 5°C. Ambient temperature is 30°C.
1. For the System Performance Table, found that
Capacity = 20.15 kW, Power Input = 3.09 kW
:DWHUÀRZUDWH
5
18
.
4
20.1
5
6
.
3
×
×
=
V
.
PñK
3. System pressure drop = 3.1 kPa
4. Read the correction factor from Table: Correction Factors (Glycol) table at 10%.
Capacity correction factor
= 0.959
:DWHUÀRZFRUUHFWLRQIDFWRU
Pressure drop correction factor
= 1.06
Correction Factors (Glycol)
10
20
30
40
-7
0.874
0.842
0.7
5
1
-4
0.896
0.872
0.779
-1
0.92
5
0.924
0.891
0.79
5
2
0.9
5
1
0.941
0.911
0.813
5
0.9
5
9
0.9
5
2
0.921
0.82
5
7
0.963
0.9
5
7
0.924
0.82
5
10
0.962
0.9
5
7
0.926
0.828
Capacity
Glycol (%)
Leaving Water
Temperature
(°C)
Содержание FVCA-40 B
Страница 27: ...Page 2 Dimensions Dimension in mm Model FVCA 50C R 60B R Model FVCA 40B Dimension in mm...
Страница 28: ...Page 2 Model FVCA 150 200 B R Dimension in mm Dimension in mm Model FVCA 80 C R 80 100 120 B R...
Страница 29: ...Page 2 Wiring Diagram Wiring Diagrams Model FVCA 40B...
Страница 30: ...Page 2 Wiring Diagram Model FVCA 50C Model FVCA 50CR...
Страница 31: ...Page Model FVCA 60B Model FVCA 60BR...
Страница 32: ...Page Model FVCA 80 C Model FVCA 80 CR...
Страница 33: ...Page 3 Model FVCA 80 100 120 B Model FVCA 80 100 120 BR...
Страница 34: ...Page 3 Model FVCA 150 200 B Model FVCA 150 200 BR...
