Unit External Head - York YVAG012 Operation & Maintenance Manual

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.
Model Type
Rated Water Flow
Minimum/L
Water Volume
Maximum/
Capacity Limitation
Minimum Water
Pressure for
Operation
Maximum Water
Pressure for
Operation
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.

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.
JOHNSON CONTROLS
Cooke Industries - Phone: +64 9 579 2185
TABLE 7 – WATER VOLUME LIMITATION
012 014 016
YVAG
1.9 2.4 2.7
m3/h
45 55
90 90
L
30 30
kPa
600 600 600
kPa
FIGURE 15 – BUFFER WATER TANK INSTALLATION
Email: sales@cookeindustries.co.nz
Users shall be at their own risk for any
loss if it is due to the matter of water
quality.
018 020 022
3.1 3.4 3.8
55 55 78 78
90 90 180 180
30 30 30 30
600 600 600
Web: www.cookeindustries.co.nz
FORM NO.: 6U5M-A11M-NB-EN
025 028 033 040
4.3 4.8 5.5 6.9
78 78 78 78
180 180 180 180
30 30 30 30
600 600 600 600
21