○ Ensure that the material or finishing of the floor surface is waterproof or has a waterproof coating applied.○ Always ensure that the floor surface is horizontally level.○ Ensure that the floor surface is smooth and free from bumps around the attachment areas.○ Prevent the step height of floor joint.○ Be sure to use a floor panel of 3 mm thickness.○ Use a hard floor panel made of polyvinyl chloride (PVC) tiles, etc.○ Do NOT use a cushion floor. Using a cushion floor may cause troubles in detaching and attaching the upper unit.○ For installation of upstairs, make sure to take appropriate waterproof measures.○ Do not use a floor panel with significant bumps or dents that disturb transfer of the upper unit.○ Do not use a floor panel that becomes slippery when water is leaking.○ Use the waterproof material for the floor.○ If the product is installed on the floor above a room, always make sure to take appropriate waterproof measures(waterproofing work, installation of a stainless steel pan, attachment of a leakage sensor, etc.).○ This company will not bear any responsibility whatsoever for water leakage due to the waterproof installation failure.■ Floor Surface■ Water LeakageMake sure to prevent the water leakage for the worst.■ Installation Of Pipes■ Plumbing● Diameter of pipes and gradient of drain line● Drainpipe end treatment (Ascending part dimensions)The following are important points to adhere to during the installation of pipes.Read through the details carefully and ensure that the pipes are installed correctly.When installing this product, ensure that installation of pipes adheres to the instructions outlined in "CAUTIONs duringinstallation of pipes". Installing pipes without reading through the CAUTIONs will mean water may not mix properly,and a set temperature will not be achieved.This product is designed for indoor installation. Always install this product indoors.Refer to the Plumbing Drawing on page 2.Use dependent drainage for YUME OASIS only.Layout the drain line in a straight line as best as possible.Number of upper units tobe used simultaneously Diameter of Drainpipe Gradient of drain line2 units or less3 units or moreAt least VU 50At least VU 75CAUTIONUse a drainpipe of appropriate diameter according to thenumber of units to be installed.At least 1/100At least 1/504CAUTION Make sure that the drainpipe does not have double trapping.Drain failure or abnormal noises may occur.