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Nmportant safety information is displayed in this manual5 Tlease pay attention to these points and
keep them in the future carefully5
85 Wafety caution concerned with new refrigerant
Xhe pressure of refrigerant V;87F is 85= times than that of refrigerant V995 Xhe refrigerant oil has
also been changed5 Xherefore be sure that the former refrigerant oil and other contaminants are
not mixed into the refrigerating cycle of the air conditioner with the new refrigerant during installation
or service work5 Nf incorrect work is performed3 there is a possibility of serious accident5 Yse tools
and materials exclusive to V;87F5
95 Hautions on installation6service
C Ion.t mix other refrigerants or other refrigerant oil with V;87F5
C Xhe types of tools and joins3 including the service port differ from those of the former refrigerant
in order to prevent mixtakes5
C Xhe operation pressure of V;87F is high3 always use pipes with the correct wall thickness and
which are specified for V;87F5
C Iuring installation3 ensure pipes are clean and ensure contaminants do not enter the pipes because
the system will be affected by the impuries such as the water3 the dirt3 oil3 and so on5
C Jnsure brazing is completed using the nitrogen5
C Yse a vacuum pump for air purge5
C V;87F refrigerant is an azeotropic mixture type refrigerant5 Xherefore use liquid state to charge
the refrigerant5 Nf gas state refrigerant is used3 the composition of refrigerant will change which affects
the performance characteristics of the air conditioner5
:5 Qaterials
C Kor the refrigerant pipes3 use copper pipes and keep the number of joints to a minimum5
C [hen using long copper pipe for V;87F3 it is recommended to use the seamless copper material
which includes bonded oil3 of amount ;7mg687ml or less5
C Io not use crushed3 deformed or discoloured pipes5
C Yse material in which the amount of contaminates inside the pipes or joint are kept to an absolute
minimum5
C Xhe use of flared joint for joining refrigeration pipes should not be used3 except where fitted to
the indoor6outdoor units by the factory5
