Page 26
Note On Adding Refrigerant
CAUTION
• Refrigerant charging must be performed after wiring, vacuuming and the leak test.
• DO NOT exceed the maximum allowable quantity of refrigerant or overcharge the system.
Doing so can damage or impact the unit’s function.
• Charging with unsuitable substances may cause explosions or accidents. Ensure that the
appropriate refrigerant is used.
• Refrigerant containers must be opened slowly. Always use protective gear when charging the
system.
• For the R290 or R32 refrigerant model, make sure the condtions within the area have been
made safe by control of flammable material when the refrigerant added into air conditioner.
• The maximum refrigerant charge amount of R32 is 305 grams.
• DO NOT mix refrigerants types.
Some systems require additional charging depending on pipe lengths. The standard pipe length
varies according to local regulations. For example, in North America, the standard pipe length is
7.5m (25’) In other areas, the standard pipe length is 5m (16‘). The additional refrigerant to be
charged can be calculated using the following formula:
Liquid Side Diameter
R32 :
(Total pipe length -
standard pipe length)x
12g(0.13oZ)/m(ft)
(Total pipe length -
standard pipe length)x
24g(0.26oZ)/m(ft)
(Total pipe length -
standard pipe length)x
40g(0.42oZ)/m(ft)
φ6.35(1/4”) φ9.52(3/8”) φ12.7(1/2”)
R22
(orice tube in the indoor unit):
(Total pipe length -
standard pipe length)x
30g (0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)x
65g(0.69oZ)/m(ft)
(Total pipe length -
standard pipe length)x
115g(1.23oZ)/m(ft)
R22
(orice tube in the outdoor unit):
(Total pipe length -
standard pipe length)
x15g(0.16oZ)/m(ft)
(Total pipe length -
standard pipe length)
x30(0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)
x60g(0.64oZ)/m(ft)
(Total pipe length -
standard pipe length)
x65g(0.69oZ)/m(ft)
R410A:
(orice tube in the indoor unit):
(Total pipe length -
standard pipe length)
x30g(0.32oZ)/m(ft)
(Total pipe length -
standard pipe length)
x65g(0.69oZ)/m(ft)
(Total pipe length -
standard pipe length)
x115g(1.23oZ)/m(ft)
R410A:
(orice tube in the outdoor unit):
(Total pipe length -
standard pipe length)
x15g(0.16oZ)/m(ft)
(Total pipe length -
standard pipe length)
x30g(0.32oZ)/m(ft)
Page 27
CAUTION
DO NOT place the panel facedown on the floor,
against a wall, or on uneven surfaces.
Step 1: Remove the front grille.
1. Push both of the tabs towards the middle
simultaneously to unlock the hook on the
grille.
2. Hold the grille at a 45° angle, lift it up
slightly and detach it from the main body.
Fig. 10.1
Step 2: Remove the installation covers at the
four corners by sliding them outwards.
Fig. 10.2
Step 3: Install the panel
Align the front panel to the main body, taking
into account the position of the piping and
drain sides. Hang the four latches of the
decorative panel to the hooks of the indoor
unit. Tighten the panel hook screws evenly at
the four corners. (See Fig 10.3)
NOTE: Tighten the screws until the thickness of
the sponge between the main body and the
panel reduces to 4-6mm (0.2-0.3”). The edge
of the panel should be in contact with the
ceiling well.
Adjust the panel by turning it to the arrowed
direction shown in Fig 10.3 so that the ceiling
opening is completely covered.
Piping side
Drain side
Screwdriver
1.
Connect the two louver motor connectors
to the corresponding wires in the control
box.
Connect the
louver motor
Connect the
louver motor
Fig. 10.4
Fig. 10.3
Panel Installation
10
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