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Installation
b
a
Internal service port
b
Stop valve with service port (liquid)
c
Stop valve with service port (gas)
Typical workflow – Completely recharging refrigerant typically
consists of the following stages:
1 Determining how much refrigerant to charge.
2 Charging refrigerant.
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
4.4.2
About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
WARNING: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the formation
of a harmful gas.
Turn off any combustible heating devices, ventilate the
room, and contact the dealer where you purchased the
unit.
Do NOT use the unit until a service person confirms that
the part from which the refrigerant leaked has been
repaired.
Installation manual
10
a
c
4.4.3
Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
4.4.4
Definitions: L1~L7, H1, H2
(a)
Pair
L1
(a)
Triple
L2
L3
L4
L1
(a)
Assume that the longest line in the illustration corresponds
with the actual longest pipe, and the highest unit in the
illustration corresponds with the actual highest unit.
L1
Main piping
L2~L7
Branch piping
H1
Height difference between the highest indoor unit and the
outdoor unit
H2
Height difference between the highest and the lowest
indoor unit
Refrigerant branch kit
4.4.5
Charging additional refrigerant
To determine the additional refrigerant amount
To determine if adding additional refrigerant is necessary
If
(L1+L2+L3+L4+L5+L6+L7)≤
chargeless length
Chargeless length=
▪ 10 m (size‑down)
▪ 40 m (standard)
▪ 15 m (size‑up)
(L1+L2+L3+L4+L5+L6+L7)>
chargeless length
INFORMATION
Piping length is the largest one-way length of liquid piping.
(a)
Twin
L2
L3
L1
(a)
Double twin
L4
L2
L5
L6
L3
L7
L1
Then
You do not have to add
additional refrigerant.
You must add additional
refrigerant.
For future servicing, encircle the
selected amount in the tables
below.
RZAG71~140N7V1+Y1
Sky Air Alpha-series
4P573382-1 – 2019.04
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