Refrigerant Charging - LG MULTI V S ARUB060GSS4 Installation Manual

16
• Keep the 40 m (131 ft) distance from the first branch to the farthest
indoor.
1) under 40 m (131 ft)
Indoor
Y branch
Unit
Keep the sum of indoor capacity under 58 kW (192 kBtu/h).
1) under 40 m (131 ft)
Indoor Indoor Indoor Indoor
Unit Unit Unit Unit
Keep the sum of indoor capacity under 58 kW (192 kBtu/h).
Indoor Unit Connection
Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
Indoor Unit capacity Liquid pipe
[kW(Btu/h)] [mm(inch)]
≤ 5.6 (19 100)
Ø 6.35 (1/4)
< 16.0 (54 600) Ø 9.52 (3/8)
< 22.4 (76 400) Ø 9.52 (3/8)
< 28.0 (95 900) Ø 9.52 (3/8)
CAUTION
!
• Bending radius should be
at least twice the diameter
of the pipe.
• Bend pipe after 500 mm
(19-5/8 inch) or more from
branch(or header).
Do not bend U type.
It may cause Performance
unsatisfactory or noise.
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 : Ø 25.4 mm (1.0 inch)
+ Total liquid pipe : Ø 22.2 mm (7/8 inch)
+ Total liquid pipe : Ø 19.05 mm (3/4 inch)
+ Total liquid pipe : Ø 15.88 mm (5/8 inch)
+ Total liquid pipe : Ø 12.7 mm (1/2inch)
+ Total liquid pipe : Ø 9.52 mm (3/8inch)
+ Total liquid pipe : Ø 6.35 mm (1/4 inch)
+ Number of installed HR unit
+ CF value of indoor unit
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5 kW - 1 ea, Ceiling concealed
Duct 7.3 kW - 2 ea, Wall Mounted 2.3 kW - 4 ea
CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg (4.67 lbs)
Indoor Indoor Indoor
Unit Unit Unit
Indoor Indoor Indoor Indoor
Unit Unit Unit Unit
Gas pipe [mm(inch)]
Ø 12.7 (1/2)
Ø 15.88 (5/8)
Ø 19.05 (3/4)
Ø 22.2 (7/8)
500 mm 500 mm
(19-5/8 inch) (19-5/8 inch)
or more or more
x 0.480 kg/m (0.323 lbs/ft)
x 0.354 kg/m (0.238 lbs/ft)
x 0.266 kg/m (0.179 lbs/ft)
x 0.173 kg/m (0.116 lbs/ft)
x 0.118 kg/m (0.079 lbs/ft)
x 0.061 kg/m (0.041 lbs/ft)
x 0.022 kg/m (0.015 lbs/ft)
x 0.5 kg (1.1 lbs)
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.
Total amount of refrigerant in the system
Volume of the room at which Indoor Unit of
the least capacity is installed
If the above equation can not be satisfied, then follow the
following steps.
• Selection of air conditioning system: select one of the next
- Installation of effective opening part
- Reconfirmation of Outdoor Unit capacity and piping length
- Reduction of the amount of refrigerant
- Installation of 2 or more security device (alarm for gas leakage)
• Change Indoor Unit type
: installation position should be over 2 m (6.6 ft) from the floor (Wall
mounted type ' Cassette type)
• Adoption of ventilation system
: choose ordinary ventilation system or building ventilation
system
• Limitation in piping work
: Prepare for earthquake and thermal stress

Refrigerant charging

Ⓐ Manifold Gauge
Ⓑ Low pressure side Handle
Ⓒ High pressure side Handle
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.
≤0.44 kg/m
3
3
(0.028 lbs/ft )
Low Pressure gas pipe
Liquid pipe
High Pressure gas pipe