10. Installation
64
Refrigerant pipe installation
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 (ⓑ
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.) For AM200FXVAG, basic amount of refrigerant is 8.4kg, therefore total amount of additional refrigerant
(ⓐ+ⓑ
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)
① ② ①×② ①×②)
Liquid pipe
(ⓐ)
Ø 6.35 35 0.02 0.7
ⓐ
5.575Ø 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)
① ② ①×② ①×②)
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)
① ② ①×② ①×②)
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
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