LG LMCN185HV Installation Instructions - Page 33

ENGLISH [Cealing Concealed Duct/Cealing Cassette Type] • 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 1/4 inch). Piping material: Polyvinyl chloride pipe inner diometes Ø 25mm(1 inch) and pipe fittings Pipe clamp Indoor unit Maintenance drain port • Be sure to install heat insulation on the drain piping. Heat insulation material: Polyethylene foam with thickness more than 8mm(5/16 inch). Drain test The air conditioner uses a drain pump to drain water. Use the following procedure to test the drain pump operation: • 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. Feed water Drain Pump 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. Installation Upward routing not allowed 1/50~1/100 MAX : 700 mm(27 9/16 inch) Flexible drain hose (accessory) Main drain pipe Drain port Glue the joint Drain hose connection Use the clip (accessory) Flexible drain hose Flexible drain hose 1/50~1/100 ❈ The figure can be changed according to model. Installation Manual 33