FORM NO.: 6U5M-A11M-NB-EN
JOHNSON CONTROLS 21
Regular measurement on water quality should be
conducted before unit installation and during in
service, and water quality should conform to the
requirements in the above table. Corrosion-related
leak of heat exchanger and serious deposition may
occur if water quality is over proof for long time.
Users shall be at their own risk for any
loss if it is due to the matter of water
quality.
TABLE 7 ā WATER VOLUME LIMITATION
Model Type YVAG
012 014
016 018 020
022
025 028
033
040
Rated Water Flow
m3/h
1.9 2.4
2.7 3.1 3.4
3.8
4.3 4.8
5.5
6.9
Water Volume
Capacity Limitation
Minimum/L
45 55 55 55 78 78 78 78 78
78
Maximum/
L
90 90 90 90 180
180
180 180
180
180
Minimum Water
Pressure for
Operation
kPa
30 30 30 30 30 30 30 30 30
30
Maximum Water
Pressure for
Operation
kPa
600 600
600 600 600
600
600 600
600
600
Notes: The data above is suitable for the condition when the highest point of water system is 20 m higher than
the unit. The maximum water volume is only available to the unit with built-in expansion tank.
FIGURE 1
5
ā BUFFER WATER TANK INSTALLATION
UNIT EXTERNAL HEAD
Measurement unit (contain water pump) to the inlet and outlet water pressure difference, can draw a closed head
under the water, the closed to lift the water flow basic as shown in the closed pressure curve, the pipeline system
design "closed pressure curve" for reference.
Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz