2-5. Additional charge calculation
CAUTION
• Do not turn on the power unless all operations are complete.
• After evacuating the system, add refrigerant.
• Do not charge the system with a refrigerant other than R410A.
• Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the total
amount of refrigerant will lead to malfunction during charging of refrigerant.
• Do not reuse recovered refrigerant.
• When charging the refrigerant, take into account the slight change in the composition of the gas
and liquid phases, and always charge from the liquid phase side whose composition is stable.
Adding refrigerant through the gas pipe will cause a malfunction.
• Check if the steel cylinder has a siphon installed or not before filling. (There is an indication
“with siphon for filling liquid” on steel cylinder.)
Filling method for cylinder with siphon
GAS
Liquid
Set the cylinder vertical and fill with the liquid.
(Liquid can be filled without turning bottom up with the siphon in-
side.)
Filling method for other cylinders
GAS
Liquid
Turn bottom up and fill with the liquid.
(Be careful to avoid turning over the cylinder.)
• Be sure to use the special tools for R410A for pressure resistance and to avoid mixing of impure
substances.
• If the units are further apart than the maximum pipe length, correct operation cannot be guaran-
teed.
• Make sure to back closing valve after refrigerant charging. Otherwise, the compressor may fail.
• Minimize refrigerant release to the air. Excessive release is prohibited under the Freon collec-
tion and destruction law.
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2-5. Additional charge calculation
2. Pipe design
SYSTEM
DESIGN
SYSTEM
DESIGN
Summary of Contents for AUYG18LVLB
Page 151: ...Part 2 OUTDOOR UNIT SIMULTANEOUS MULTI AOYG72LRLA AOYG90LRLA ...
Page 181: ...Part 3 SYSTEM DESIGN ...
Page 333: ...Part 4 OPTIONAL PARTS ...
