DC Inverter U-match Series Floor Ceiling Type Unit 
25 
Screw on the flare nut of the flaring connecting pipe on the outdoor unit valve. 
The method of screwing the flare nut is the same with that for indoor unit.   
Gas pipe
Liquid pipe
Pipe
coupling
or
or
3-way valve 2-way valve
 
3.2.3.5 Thermal Insulation of Pipe Joint (Only for Indoor Unit) 
Stick coupler heat insulation (large and small) to the place where connecting 
pipes. 
Front outlet
Coupler heat
insulation (small)
on the pipe
Liquid pipe
Gas pipe
Reference A
Coupler heat insulation
(large) on the pipe
Heat insulation pipe
Reference A:
Cover this portion with heat
insulating material also without fail
No gap
 
3.2.3.6 Sealing of the Knock-off Hole 
As for the built-in valve model, during the installation process for connection 
pipe,  when  the  connection  pipe  is  passing  through  the  knock-off  hole,  conduct