Additional refrigerant per pipe length
Connective pipe
length (m)
Air purging
method
Additional refrigerant
≤ Standard pipe
length
Vacuum
Pump
N/A
> Standard pipe
length
Vacuum
Pump
Liquid Side: Ø 6.35 (Ø 0.25”)
R32:
(Pipe length – standard length) x 12g/m
(Pipe length – standard length) x 0.13oZ/ft
R290:
(Pipe length – standard length) x 10g/m
(Pipe length – standard length) x 0.10oZ/ft
R410A:
(Pipe length – standard length) x 15g/m
(Pipe length – standard length) x 0.16oZ/ft
Liquid Side: Ø 9.52 (Ø 0.375”)
R32:
(Pipe length – standard length) x 24g/m
(Pipe length – standard length) x 0.26oZ/ft
R290:
(Pipe length – standard length) x 18g/m
(Pipe length – standard length) x 0.19oZ/ft
R410A:
(Pipe length – standard length) x 30g/m
(Pipe length – standard length) x 0.32oZ/ft
For R290 refrigerant unit, the total amount of refrigerant to be charged is no more than:
387g(<=9000Btu/h), 447g(>9000Btu/h and <=12000Btu/h),
547g(>12000Btu/h and <=18000Btu/h), 632g(>18000Btu/h and <=24000Btu/h).
A
Warning
DO NOT mix refrigerant types.
4.
Air evacuation
Split-type room air conditioner / Installation Manual
66 / 120 EN
