5 Installation
Installation manual
14
RZAG71~Y1
Sky Air Alpha-series
4P695306-1 – 2022.05
Completely recharging refrigerant
Before completely recharging refrigerant, make sure the following is
done:
1 All refrigerant is recovered from the system.
2 The outdoor unit's
external
refrigerant piping is checked (leak
test, vacuum drying).
3 Vacuum drying on the outdoor unit's
internal
refrigerant piping is
performed.
NOTICE
Before completely recharging, perform vacuum drying on
the outdoor unit's
internal
refrigerant piping as well.
NOTICE
To perform vacuum drying or a complete recharge of the
outdoor unit’s internal refrigerant piping it is necessary to
activate the vacuum mode (see
16]) which will open
required valves in the refrigerant circuit so the vacuuming
process or recharge of refrigerant can be done properly.
▪ Before vacuum drying or recharging, activate field
setting "vacuum mode".
▪ After finishing vacuum drying or recharging, deactivate
field setting "vacuum mode".
WARNING
Some sections of the refrigerant circuit may be isolated
from other sections caused by components with specific
functions (e.g. valves). The refrigerant circuit therefore
features additional service ports for vacuuming, pressure
relief or pressurizing the circuit.
In case it is required to perform
brazing
on the unit, ensure
that there is no pressure remaining inside the unit. Internal
pressures need to be released with ALL the service ports
indicated on the figures below opened. The location is
depending on model type.
Location of service ports:
b
c
a
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.
5.4.2
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
Periodical inspections for refrigerant leaks may be required
depending on the applicable legislation. Contact your installer for
more information.
WARNING: FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
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.
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.
5.4.3
Precautions when charging refrigerant
INFORMATION
See the precautions and requirements in the General
safety precautions and in chapter Preparing refrigerant
piping of the Installer reference guide.
5.4.4
Definitions: L1~L7, H1, H2
Pair
(a)
H1
L1
Twin
(a)
H1
H2
L1
L2
L3
