LG ACAH020HETB, Installation And Owner'S Manual

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ter Piping System Installation
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Maximum Operating Pressure / Pressure Drop
Figure 22: Cold Water Head Loss Curve.
Pressure drop (psi)
Water flow rate (gpm)
36.3
29.0
21.8
14.5
7.25
52.8 105.6 158.5 211.3 264.1 317 369.8 422.6
0
0
One (1) Unit
* GPM : Gallon Per Minute
ACAH Heat Exchanger Pressure Drop Graph
Model No.
Operating Maximum
Pressure (psi)
Water Pressure
Drop (psi)
ACAH020HETB
Refrigerant: 597;
Water: 142
5.63
Table 5: System Maximum Pressure and Water Pressure
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Particles
Water
Circulating Water Cold Water
pH (77°F [25°C]) 6.5 - 8.0 6.5 - 8.0
&RQGXFWLRQ5DWHƒ)>ƒ&@ȝVFP 500 or below 200 or below
Alkali Level (ppm) 100 or below 50 or below
Hardness (ppm) 100 or below 50 or below
Chlorine Ion (ppm) 100 or below 50 or below
Lactic Acid Ion (ppm) 100 or below 50 or below
Iron (ppm) 0.1 or below 0.3 or below
Sulfur Ion (ppm) Must not be detected Must not be detected
Ammonium Ion (ppm) 0.5 or below 0.2 or below
Silica (ppm) 50 or below 30 or below
Table 4: Chiller Water Standards.
Water Pipe Installation
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• Water pipe size must be the same or larger than that of the chiller.
• To prevent the water pipe connections from sagging due to the load, install appropriate pipe supports.
• Position the water inlet pipe at the bottom of the water pipe system, and position the outlet pipe at the top of the water pipe system.
• If there is a risk of condensation, install insulation on the cold water outlet pipe.
• To prevent the connected pipe from freezing during winter season, install the drain valve at the bottom of the pipe system.
Water Pump Control
If the water pumps do not operate for an extended period, internal corrosion is more likely.
Water Quality Management
Impurities in the water can influence chiller performance and life expectancy. The water must be tested and treated using a local water treat-
ment professional, and water quality must not fall below the standards listed in the table.
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QUALITY MANAGEMENT