Airwell YDAC-025R-09M25, User & Installation Manual

Page: 36 / 265

 Page 35 
Air Evacuation
Note on Adding Refrigerant
Some systems require additional charging depending on pipe lengths. The standard pipe length varies
according to local regulations.
T
he standard pipe length is 5m (16‘). The refrigerant should be charged
from the service port on the outdoor unit’s low pressure valve. The additional refrigerant to be charged
can be calculated using the following formula:
CAUTION
DO NOT
mix refrigerant types.
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
Liquid Side: Ø 9.52 (ø 0.375”)
R32:
(Pipe length – standard length) x 24g/m
(Pipe length – standard length) x 0.26oZ/ft