Samsung MCU-Y6NEE, Installation Manual

Page: 13 / 24

13
• Total amount of refrigerant in the system must be less then 100kg. If total amount of refrigerant in the system is
over 100kg, the system has to be divided into smaller system, each containing less than 100kg.
Simultaneous heating and cooling- Additional refrigerant
Additional refrigerant charging
■
Additional refrigerant is charged according to the length and size of liquid pipe.
• Example) Additional refrigerant charging
Liquid pipe size (O.D. mm) Additional refrigerant charging (kg/m)
Ø6.35 0.02
Ø9.52 0.06
Ø12.70 0.125
Ø15.88 0.18
Ø19.05 0.27
Ø22.23 0.35
Ø25.40 0.53
Ø12.70(1m)
Ø12.70(5m)
Ø19.05(10m)
MCU
Ø9.52
(15m)
Ø9.52
(10m)
MCU
Ø9.52(25m)
Ø9.52(15m)
Ø9.52(18m)
Ø15.88(10m) Ø15.88(10m)
Ø6.35(15m)
Ø9.52
(25m)
61.6kW
11.2kW
2.8kW
11.2kW
7.1kW
7.1kW
7.1kW
7.1kW
7.1kW
Ø6.35(2m)
Ø6.35(10m)
Additional refrigerant charging of MCU kit (kg/unit)
Additional refrigerant charging of MCU is 0.5kg for every
MCU kit
0.5
Additional refrigerant charging of distribution kit (kg/m) Remarks
Regardless of the liquid pipe size, additional refrigerant
charging is 0.01kg per meter after distribution kit
0.01
For wall-mounted &
ceiling indoor unit

The amount of the refrigerant that is already placed in
Classification 8HP 10HP 12HP 14HP 16HP 18HP 20HP
Standard 5.0 5.0 5.0 7.0 7.0 8.5 8.5

Charge the additional refrigerant according to the indoor unit
capacity. The amount of the additional refrigerant charging for each
indoor unit capacity = 0.046kg/kW

The method to calculate the total amount of the refrigerant.
- The amount of the refrigerant according to the pipe size and length (
ⓐ
)
- The amount of additional refrigerant charging for each indoor unit ( ⓑ ) =
∑
(Indoor unit capacity) x 0.046
- The amount of other additional refrigerant charging (
ⓒ
) = ∑ (The number
of MCU Kit installed) x 0.5
- The total amount of the additional refrigerant charging = ⓐ + ⓑ + ⓒ
■
Example of additional refrigerant charging. Pipe length is as below.
Liquid pipe size
(O.D. mm)
Ø6.35 Ø9.52 Ø12.70 Ø15.88 Ø19.05
Length (m) 25 101 6 20 10
MCU Pipe length after
distribution kit (m)
2 Ea 2
❈
ⓐ
= 25x0.02 +101x0.06 + 6x0.125 + 20x0.18 + 10x0.27 = 13.61kg
ⓑ = (11.2x2 + 7.1x5 + 2.8x1)x0.046 = 2.7922kg
ⓒ
= 2x0.01 + 2x0.5 = 1.02
The total amount of the additional refrigerant charging :
ⓐ + ⓑ + ⓒ = 13.61 + 2.792 + 1.02 = 17.422kg
❈
Total refrigerant amount of the system must be less than 100kg.
If total refrigerant amount of system is over 100kg, the system has to be
divided into smaller system, each containing less than 100kg.
ex) 20HP outdoor refrigerant is already charged 8.5kg, so the additional
refrigerant must not be over 91.5kg.
MCU-Y6NEE_IM_E 33933A(1).indd 13 2011-06-28 오후 5:48:43