-27-
Sheet 2. Additional refrigerant charging amount
for R22 R407C R410A
and R134a
Note: The additional refrigerant charging amount in Sheet 2 is recommended
value, not compulsory.
Diameter of connection pipe mm Indoor unit throttle Outdoor unit throttle
Liquid pipe Gas pipe Cooling only,
cooling and heating
(g / m)
Cooling only
(g / m)
Cooling and
heating (g /
m)
Ф6 Ф9.5 or Ф12 20 15 20
Ф6 or Ф9.5 Ф16 or Ф19 50 15 50
Ф12 Ф19 or Ф22.2 100 30 120
Ф16 Ф25.4 or Ф31.8 170 60 120
Ф19 - 250 250 250
Ф22.2 - 350 350 350
Configuration of connection pipe and additional volume of refrigerant
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