21 7. Piping Installation; Considerations When Installing Water Piping; Air Vent (For Cold Water); Air Vent (For Cooling Water) - LG RCWFL Series Installation Manual

7. PIPING INSTALLATION

7-1. Considerations when Installing Water Piping

Install considering the following when constructing water piping with the Chiller.
Water piping is out of the scope of the standard installation work of LG Electronics.
Check whether the considerations are properly applied when installing the Chiller.
(cold water pump)
Figure10. Piping system connected to the chiller (User installation scope)
1) Based on the exterior diagram (Installation drawing), install the inlet/outlet piping of the cold water/cooing water.
Make sure to check the direction of the inlet/outlet, standard of connection flange and working pressure.
2) Separate support should be installed aside from that of the chiller so that the load and the vibration of the piping of
the cold water and cooling water are not transferred to the evaporator and condenser. Also provide enough space
for repair.
3) Install a strainer of 10 mesh or higher on the front side of the inlet pipe of the cold water/cooing water, so that the
heat transfer tube of the heat exchanger is not blocked by particles. It may cause damage of copper tube (freeze or
damage).
4) Provide a device on the outlet of the turbo chiller to control the flow amount of the cold water and cooling water.
5) Provide a device to prevent pressure hunting that may cause a malfunction to the flow switch of the cold water
and cooling water.
6) The water box cover should be easy to open to clean the heat transfer tubes of the heat exchanger. Install the pip-
ing connections to be separated easily without interfering with other piping when extracting heat transfer tubes.
7) Please avoid using cold water/cooing water pump at 3,600 RPM.
It may cause resonance as the RPM is the same as that of the motor of the Centrifugal Chiller.
A vibration isolation device should be installed if unavoidable.
8) Install an accurate thermometer and pressure gauge on the piping so that the status of the cold water/cooing
water supplied to the Centrifugal chiller can be checked and managed.
9) Install an air vent valve, drain valve, and piping in the cold water and cooling water box.
Also, install an automatic air discharge valve on the piping.
10) Use of inappropriate water can cause sediments, corrosion and scaling to damage the product. Therefore, check
and manage the water quality standard. LG Electronics does not take any responsibility for the problem caused by
using water with quality beyond the warranty range.
11) Install the discharge pipe for the relief valve in accordance with the high pressure gas safety management law.
Cooling tower
Cooling tower
(coolant pump)
Air vent
(Uppermost
Load
piping)
Load
strainer
flexible
joint
Thermometer
Pressure gage
Cold water drain
Stop valve
Cooling water drain
Air vent
(Uppermost piping)
stop valve
Compressor Motor power

Inverter

Air
vent
Control power
Control signal
Main power & Auxiliary power
Supplier Scope
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