DC Inverter Multi VRF System   
 
15 
 
 
                              Fig. 13                                      Fig. 14 
4.3.5 Outdoor Pipe Connection 
 During  engineering  installation,  the  connection  pipe  inside  the  unit  must  be  wrapped  by 
insulation sleeve. 
(1) Pipe  connection  for  GMV-H224WL/A-X,GMV-224WL/C-X:As  shown  in  Fig.15  and 
Fig.16,  open  the  outermost  soundproof  cotton  and  place  a  fire  barrier  between 
compressor  and  straight  pipe.  Use  a  soldering  gun  to  unsolder  straight  pipe  1  and 
straight pipe 2. Install connection pipe 1 and connection pipe 2 to the corresponding 
position  and  then  seal  the  apertures  with  welding  rod.  First  weld  the  liquid  side 
connection  pipe  and  then  weld  the  gas  side  connection  pipe.  During  welding,  it’s 
necessary to use wet gauze to wrap up the two cut-off valves. Make sure the flame 
won’t burn the soundproof cotton or other components. 
 
 
Fig. 15 
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