Water Piping And Water Circuit Connection - LG Therma V AHUW056A3 Engineering Product Data Book

THERMA V
Split Type
9. Installation

9.2 Water Piping and water Circuit Connection

9.2.1 General considerations
• Followings are should be considered before beginning water circuit connection.
• Service space should be secured.
• Water pipes and connections should be cleaned using water.
• Space for installing external water pump should be provided if internal water pump capacity is not enough
forinstallation field.
• Never connect electric power while proceeding water charging.
9.2.2 Water piping and water circuit connection
1. Definition of terms are as follow :
• Water piping : Installing pipes where water is flowing inside the pipe.
• Water circuit connecting : Making connection between the unit and water pipes or between pipes and
pipes. Connecting valves or elbows are, for example, in this category.
Configuration of water circuit is shown in 6.3 Installation Scenes. All connections should be complied with
presented diagram.
2. While installing water pipes, followings should be considered :
• While inserting or putting water pipes, close the end of the pipe with pipe cap to avoid dust entering.
• When cutting or welding the pipe, always be careful that inner section of the pipe should not be defective.
For example, no weldments or no burrs are found inside the pipe.
• Drain piping should be provided in case of water discharge by the operation of the safety valve.
This situation can be happened when the internal pressure is over 3.0 bar and water inside the indoor unit
will be discharged to drain hose.
3. While connecting water pipes, followings should be considered :
• Pipe fittings (e.g. L-shape elbow, T-shape tee, diameter reducer, etc) should be tightened strongly to be free
from water leakage.
• Connected sections should be leakage-proof treatment by applying tefron tape, rubber bushing, sealant
solution, etc.
• Appropriate tools and tooling methods should be applied to prevent mechanical breakage of the connections.
• Operation time of flow control valve(e.g. 3way valve or 2way valve) should be less than 90 seconds.
• Drain hose should be connected with drain piping.
16
DHW Tank Integrated Unit