Samsung AR Series - Note on Adding Refrigerant

Air Evacuation
Note on Adding Refrigerant
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
Precautions on adding the R-32 refrigerant
In addition to the conventional charging procedure, the
following requirements shall be kept.
• Make sure that contamination by other refrigerants
does not occur for charging.
• To minimize the amount of refrigerant, keep the
hoses and lines as short as possible.
• The cylinders shall be kept upright.
• Make sure that the refrigeration system is earthed
before charging.
• Label the system after charging, if necessary.
• Extreme care is required not to overcharge the
system.
• Before recharging, the pressure shall be checked
with nitrogen blowing.
• After charging, check for leakage before
commissioning.
• Be sure to check for leakage before leaving the work
area.
Some systems require additional charging depending on pipe lengths.
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