Samsung AM AXV Series Installation Manual page 23

• If AHU kit is included among the indoor units, you must add 0.063kg of refrigerant for every 1kW of the AHU capacity increase.
Note1) In case the capacity conjunction of the Hydro Unit HT exceeds 50 % among the total indoor unit, please don't put the additional
refrigerant.
• Method to calculate total amount of additional refrigerant
– Amount of additional refrigerant depending on the pipe length ( )
– Amount of additional refrigerant for each indoor unit ( ) = ∑(Amount of additional refrigerant for each connected indoor unit) ※
Refer to the table
– Total amount of additional refrigerant =
※ Sum of total amount of additional refrigerant and the basic amount of refrigerant should not exceed 100kg. If the refrigerant exceeds
100kg, separate the module so that weight of the refrigerant doesn't exceed 100kg.
Ex> If the outdoor unit's basic refrigerant amount is 10.5kg, the total amount of additional refrigerant( + ) should not exceed 89.5kg.
• Example of refrigerant calculation for HP models
Classification Size of liquid pipe
Liquid pipe ( )
Model name of indoor
Classification
4way cassette
(AM071FN4DEH*)
Slim duct
(AM056FNLDEH*)
Indoor unit ( )
Slim duct
(AM045FNLDEH*)
1way cassette
(AM036FN1DEH*)
– Total amount of refrigerant ( + ) = 5.575+3.10 = 8.675 (kg)
• Example of refrigerant calculation for HR models
Classification Size of liquid pipe
Liquid pipe ( )
(EEV Kit ~ indoor unit)
Classification Model name of indoor unit
4way cassette
(AM071FN4DEH*)
4way cassette
(AM112FN4DEH*)
Indoor unit ( )
Neo forte
(AM028FNTDEH*)
– Total amount of refrigerant ( + ) = 11.965+4.66 = 16.625 (kg)
+
Length (m)
Ø 6.35 35
Ø 9.52
50
Ø 12.70 15
Number of units
unit
4
2
1
1
Length (m)
Ø 6.35 15
Ø 9.52
112
Ø 12.70 25
Ø 15.88 10
Ø 6.35
2
Number of units
5
2
1
MCU 2
Unit amount of Amount of additional
refrigerant (kg/m) refrigerant (kg)
0.02
0.06
0.125
Unit amount of Amount of additional
refrigerant (kg/EA) refrigerant (kg)
0.45
0.35
0.35
0.25
Unit amount of Amount of additional
refrigerant (kg/m) refrigerant (kg)
0.02
0.06
0.125
0.18
0.01
Unit amount of refrigerant Amount of additional
(kg/EA) refrigerant (kg)
0.45
0.57
0.27
0.5
Total amount of
additional refrigerant (kg)
∑( × )
×
0.7
3.0
5.575
1.875
Total amount of
additional refrigerant (kg)
∑( × )
×
1.80
0.70
3.10
0.35
0.25
Total amount of
additional refrigerant (kg)
∑( × )
×
0.3
6.72
3.125
11.965
1.8
0.02
Total amount of
additional refrigerant (kg)
∑( × )
×
2.25
1.14
4.66
0.27
1
English
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