10. Installation
Outdoor unit
• 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
Length (m)
Unit amount of
refrigerant (kg/m)
Amount of additional
refrigerant (kg)
Total amount of
additional refrigerant (kg)
×
∑(
× )
Liquid pipe ( )
Ø 6.35
35
0.02
0.7
5.575
Ø 9.52
50
0.06
3.0
Ø 12.70
15
0.125
1.875
Classification
Model name of indoor
unit
Number of units
Unit amount of
refrigerant (kg/EA)
Amount of additional
refrigerant (kg)
Total amount of
additional refrigerant (kg)
×
∑(
× )
Indoor unit ( )
4way cassette
(AM071FN4DEH*)
4
0.45
1.80
3.10
Slim duct
(AM056FNLDEH*)
2
0.35
0.70
Slim duct
(AM045FNLDEH*)
1
0.35
0.35
1way cassette
(AM036FN1DEH*)
1
0.25
0.25
– Total amount of refrigerant ( + ) = 5.575+3.10 = 8.675 (kg)
• Example of refrigerant calculation for HR models
Classification
Size of liquid pipe
Length (m)
Unit amount of
refrigerant (kg/m)
Amount of additional
refrigerant (kg)
Total amount of
additional refrigerant (kg)
×
∑(
× )
Liquid pipe ( )
Ø 6.35
15
0.02
0.3
11.965
Ø 9.52
112
0.06
6.72
Ø 12.70
25
0.125
3.125
Ø 15.88
10
0.18
1.8
Ø 6.35
(EEV Kit ~ indoor unit)
2
0.01
0.02
Classification
Model name of indoor unit
Number of units
Unit amount of refrigerant
(kg/EA)
Amount of additional
refrigerant (kg)
Total amount of
additional refrigerant (kg)
×
∑(
× )
Indoor unit ( )
4way cassette
(AM071FN4DEH*)
5
0.45
2.25
4.66
4way cassette
(AM112FN4DEH*)
2
0.57
1.14
Neo forte
(AM028FNTDEH*)
1
0.27
0.27
MCU
2
0.5
1
– Total amount of refrigerant ( +
) = 11.965+4.66 = 16.625 (kg)
