LG LCN340CP Service Manual - Page 27

In case of the Outdoor Unit being installed above position of the Indoor Unit. 2. Tape the Pipings and Connecting cable from bottom to top. 3. Form the pipings gathered by taping along the exterior wall, and make the trap prevent water from entering into the room. 4. Fix the pipings onto the wall by saddle or equivalent. Installation Seal a small opening around the pipings with gum type sealer. Trap 7. Drain Pipe Work I Drain Piping of Ceiling Cassette • Drain piping must have down-slope (1/50 to 1/100): be sure not to provide up-and-down slope to prevent reversal flow. • During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit. • The outside diameter of the drain connection on the indoor unit is 32mm(1.26inch). Piping material: Polyvinyl chloride pipe VP-25 and pipe fittings • Be sure to install heat insulation on the drain piping. Heat insulation material: Polyethylene foam with thickness more than 8 mm(0.31inch). Pipe clamp Indoor unit Maintenance drain port Upward routing not allowed 300mm (11.81inch) or less 1 -1.5m(3.32-4.92ft) 700mm (27.6inch) or less I Install the drain raising pipes at a right angle to the indoor unit and no more than 300mm(11.81inch) from the unit. Clamp metal(attached) Drain raising pipe Drain hose(attached) Drain test The air conditioner uses a drain pump to drain water. Use the following procedure to test the drain pump operation: Feed water Flexible drain hose (accessory) Main drain pipe Drain Pump Drain port Glue the joint Drain hose connection Use the clip (accessory) • Connect the main drain pipe to the exterior and leave it provisionally until the test comes to an end. • Feed water to the flexible drain hose and check the piping for leakage. • Be sure to check the drain pump for normal operating and noise when electrical wiring is complete. • When the test is complete, connect the flexible drain hose to the drain port on the indoor unit. Flexible drain hose Drain pan CAUTION The supplied flexible drain hose should not be curved, neither screwed. The curved or screwed hose may cause a leakage of water. Flexible drain hose 1/50~1/100 MAX 700mm (27.6inch) SFelerxvibilceedraMin ahonseual 27