LG AKWW0363UA0, Руководство по установке

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14 Water Cooled Package
Installation
14.4 Heat source water management
• The temperature of the supplied heat source water must be maintained between 59 and 104°F. If
not, it can cause problems to the product.
• The flux of the supplied heat source water must be controlled appropriately. If not, it can cause
abnormal noise, pipe vibration, pipe contraction or expansion depending on the temperature. For
the size of the pipe for heat source water, use the same diameter or above of the connecting pipe.
• Refer to the following table for pipe diameter and flux of the heat source water. The higher the flux,
the higher the noise and correction due to the increased speed and higher the inflowing air bubbles.
• Pay special attention to water quality management. If not, it can cause corrosion to the pipe of the heat
source water and cause problems to the product.(Refer to Heat source water quality management table.)
• Since the water temperature higher than 104°F can cause corrosion, it is good to add anti-
corrosive agent.
• Install the pipe valve, gauge and sensor where it is easy to maintain and repair. Install the heat
source water pipe valve at a low location where it can be drained if necessary.
• Be careful not to let air get in the pipe. Air makes the flux of the heat source water unstable during
circulation and reduces the pump efficiency and cause vibration to the heat source water pipe. Therefore,
install an air purge (Air discharger) at appropriate locations where air is expected to be generated
• Adopt the following methods to prevent the pipe from freezing. If not, there is a danger of the pipe
freezing during the winter.
- When the temperature drops circulate the water with the pump before it freezes
- Operate the boiler to maintain room temperature
- When the unit is not operated for a long period of time during the winter, drain the water of the
cooling tower
- Use the anti-freeze agent
- Refer to the following table for the minimum amount of the anti-freeze agent to add
corresponding to the freezing temperature
✽
Adding the anti-freeze agent can increase the pressure drop of the heat source water system
and reduce the product performance.
• You must use the closed type cooling tower. (You cannot use the open type.)
Diameter Flux range(m/s)
≥
4.9(125) 2.1~2.7
2~3.9(50~100) 1.2~2.1
1(25) 0.6~1.2
Minimum temperature to prevent freezing(°F)
32 23 14 5 -4 -13
Ethylene glycol (%) 0 12 20 30 - -
Propylene glycol (%) 0 17 25 33 - -
Methanol(%) 0 6 12 16 24 30
Type of anti-freeze agent
[Unit:inch(mm)]