48
ॷ
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 (
࣒॔ॣ࣑͔ͱЇ͝ϩͱ˙ɇʒʒ̈ϩ̈ͱ͝ɇ̷θʪ˙θ̈˝ʪθɇ͝ϩ˙ͱθʪɇʀ˵
ʀͱ͝͝ʪʀϩʪʒ̈͝ʒͱͱθЇ̈͝ϩ࣒࢜ŵʪ˙ʪθϩͱϩ˵ʪϩɇɵ̷ʪ
ৄ
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.
kу࣒ͱθđߤߢߢ७ǹǤ७ࡥɵɇϑ̈ʀɇ͔ͱЇ͝ϩͱ˙θʪ˙θ̈˝ʪθɇ͝ϩ̈ϑߪߦ̧˝ࡥϩ˵ʪθʪ˙ͱθʪϩͱϩɇ̷ɇ͔ͱЇ͝ϩͱ˙ɇʒʒ̈ϩ̈ͱ͝ɇ̷
refrigerant ( +
࣒ϑ˵ͱЇ̷ʒ͝ͱϩʪуʀʪʪʒ߫ߣߨऌ̧˝
ॷ
Example of refrigerant calculation for HP models
A̷ɇϑϑ̈ѣʀɇϩ̈ͱ͝
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
A̷ɇϑϑ̈ѣʀɇϩ̈ͱ͝
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
࣑đߢߩߣĘߦUk²७࣒
4
0.45
1.80
3.10
Slim duct
࣑đߢߧߨĘøUk²७࣒
2
0.35
0.70
Slim duct
࣑đߢߦߧĘøUk²७࣒
1
0.35
0.35
1way cassette
࣑đߢߥߨĘߣUk²७࣒
1
0.25
0.25
ৄ
Total amount of refrigerant ( + ) = 5.575+3.10 = 8.675 (kg)
Refrigerant pipe installation
