5 Installation
Installation manual
16
RZAG71~Y1
Sky Air Alpha-series
4P695306-1 – 2022.05
To charge additional refrigerant
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
Prerequisite:
Before charging refrigerant, make sure the refrigerant
piping is connected and checked (leak test and vacuum drying).
1
Connect the refrigerant cylinder to both the service port of the
gas stop valve and the service port of the liquid stop valve.
2
Charge the additional refrigerant amount.
3
Open the stop valves.
5.4.6
Completely recharging refrigerant
To determine the complete recharge amount
To determine the complete recharge amount (kg) (in case of
standard liquid pipe size)
Model
Length (m)
(a)
3~40 40~50 50~55 55~60 60~70 70~80 80~85
RZAG71
3.2
3.55
3.75
—
—
—
—
RZAG100
3.2
3.55
3.9
4.25
4.6
4.75
RZAG125-140
3.7
4.05
4.4
4.75
5.1
5.25
(a)
Length=L1 (pair); L1+L2 (twin, triple); L1+L2+L4 (double twin)
To determine the complete recharge amount (kg) (in case of
size‑up liquid pipe size)
Model
Length (m)
(a)
3~15
15~20
20~25
25~30
30~35
RZAG71
3.2
3.55
3.9
—
—
RZAG100
3.2
3.55
3.9
4.25
4.6
140
3.7
4.05
4.4
4.75
5.1
(a)
Length=L1 (pair); L1+L2 (twin, triple); L1+L2+L4 (double twin)
Length=L1 (pair); L1+L2 (twin, triple); L1+L2+L4 (double twin)
To determine the complete recharge amount (kg) (in case of
size‑down liquid pipe size)
Model
Length (m)
(a)
3~10
100
3.2
140
3.7
(a)
Length=L1 (pair); L1+L2 (twin, triple); L1+L2+L4 (double twin)
Length=L1 (pair); L1+L2 (twin, triple); L1+L2+L4 (double twin)
To activate/deactivate the vacuum mode field
setting
Description
To perform vacuum drying or a complete recharge of the outdoor
unit’s internal refrigerant piping it is necessary to activate the
vacuum mode which will open required valves in the refrigerant
circuit so the vacuuming process or recharge of refrigerant can be
done properly.
To activate vacuum mode:
Activating the vacuum mode is done by operating the push buttons
BS* on the PCB (A1P) and reading the feedback from the 7‑segment
displays.
Operate the switches and push buttons with an insulated stick (such
as a closed ball-point pen) to avoid touching of live parts.
1
When the unit is powered on and not running, hold down the
BS1 pushbutton for 5 seconds.
Result:
You will reach the setting mode, the 7 segment display
will show '2 0 0'.
2
Press the BS2 button until you reach page
2–17
.
3
When
2–17
is reached, press the BS3 button once.
4
Change the setting to '
2
' by pressing the BS2 button once .
5
Push the BS3 button once.
6
When the display is not blinking anymore, press the BS3 button
again to activate vacuum mode.
To deactivate vacuum mode:
After charging or vacuuming the unit, please deactivate the vacuum
mode:
1
Press the BS2 button until you reach page
2–17
.
2
When
2–17
is reached, press the BS3 button once.
3
Change the setting to '
1
' by pressing the BS2 button once.
4
Push the BS3 button once.
5
When the display is not blinking anymore, press the BS3 button
again to deactivate vacuum mode.
6
Press the BS1 button to leave the setting mode.
Make sure to reattach the electronic component box cover and to
install the front cover after the job is finished.
NOTICE
Make sure that all outside panels, except for the service
cover on the electrical component box, are closed while
working.
Close the lid of the electrical component box firmly before
turning on the power.
Charging refrigerant: Setup
"5.3.1 Checking refrigerant piping: Setup"
To completely recharge refrigerant
WARNING
▪ Only use R32 as refrigerant. Other substances may
cause explosions and accidents.
▪ R32 contains fluorinated greenhouse gases. Its global
warming potential (GWP) value is 675. Do NOT vent
these gases into the atmosphere.
▪ When charging refrigerant, ALWAYS use protective
gloves and safety glasses.
Prerequisite:
Before completely recharging refrigerant, make sure
the system is pumped down, the outdoor unit's
external
refrigerant
piping is checked (leak test, vacuum drying) and vacuum drying on
the outdoor unit's
internal
refrigerant piping is performed.
1
If not already done (for vacuum drying of the unit), activate the
vacuum mode (see
"To activate/deactivate the vacuum mode
16])
2
Connect the refrigerant cylinder to the service port of the liquid
stop valve.
3
Open the liquid stop valve.
