20 _ Ceiling Cassette 1-Way
Indoor Units
• Please read this instruction sheet completely before installing the product.
• When the power cord is damaged, replacement work shall be performed by authorized personnel only.
• Installation work must be performed in accordance with the national wiring standards by authorized personnel only.
Required Parts Required Tools
• Connecting cable
• Pipes: Gas side
Liquid side
• Hanging Bolt
(W 3/8 or M10 length 650mm)
• Insulated drain hose
• Additional Drain hose 
• Level  
• Screw driver 
• Electric drill
• Hole core drill
• Flaring Tool set
• Torque Wrenches
• Hexagonal Wrench 
• Gas-leak detector
• Thermometer 
10.1 Selection of the best location
• There should not be any heat source or steam near the
unit. 
• There should not be any obstacles to the air circulation.
• A place where air circulation in the room will be good. 
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into considera-
tion.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, 
ceiling, or other obstacles.
• The indoor unit must have the maintenance space
.