Refrigerant Charging - LG Multi V Water IV ARWN080LAS4 Manual De Instalación

The amount of Refrigerant
The calculation of the additional charge should take into account the
length of pipe and CF(correction Factor) value of indoor unit.
=
Additional charge(kg) Total liquid pipe : Ø25.4 mm
+
Total liquid pipe : Ø22.2 mm
+
Total liquid pipe : Ø19.05 mm
+
Total liquid pipe : Ø15.88 mm
+
Total liquid pipe : Ø12.7 mm
+
Total liquid pipe : Ø9.52 mm
+
Total liquid pipe : Ø6.35 mm
CF value of indoor unit
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5kW -1ea, Ceiling concealed
Duct 7.3kW-2ea, Wall Mounted 2.3kW-4ea
CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg
Attach the additional refrigerant table of IDU.
! WARNING
• Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following
equation for human safety.
x 0.480(kg/m)
Total amount of refrigerant in the system
x 0.354(kg/m)
Volume of the room at which Indoor Unit of
x 0.266(kg/m)
If the above equation can not be satisfied, then follow the follow-
x 0.173(kg/m)
ing steps.
• Selection of air conditioning system: select one of the next
x 0.118(kg/m)
- Installation of effective opening part
- Reconfirmation of Outside Unit capacity and piping length
x 0.061(kg/m)
- Reduction of the amount of refrigerant
- Installation of 2 or more security device (alarm for gas leakage)
x 0.022(kg/m)
• Change Indoor Unit type
: installation position should be over 2m from the floor (Wall
mounted type Cassette type)
• Adoption of ventilation system
: choose ordinary ventilation system or building ventilation sys-
tem
• Limitation in piping work
: Prepare for earthquake and thermal stress

Refrigerant charging

Ⓐ Manifold Gauge
Ⓑ Low pressure side Handle
Ⓒ High pressure side Handle
Liquid pipe
Gas pipe
WARNING
!
• Pipe to be vacuumed : gas pipe, liquid pipe
• If the refrigerant amount is not exact, it may not operate
properly.
• If additionally bottled refrigerant amount is over 10%, condenser
burst or insufficient indoor unit performance may be caused.
the least capacity is installed
17
≤0.44 (kg / m
3
)