6 Installation
Installer reference guide
19
RZQG71~Y1 + RZQSG100~Y1
Split system air conditioners
4P385522-1A – 2016.10
3 Filling in the fluorinated greenhouse gases label, and fixing it to
the inside of the outdoor unit.
Completely recharging refrigerant
Before completely recharging refrigerant, make sure the following is
done:
1 The system is pumped down.
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. To do
so, use the internal service port of the outdoor unit
(between the heat exchanger and the 4‑way valve). Do
NOT use the service ports of the stop valves, because
vacuum drying cannot be performed properly from these
ports.
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:
RZQG100~
RZQSG140_V1
a
b
c
RZQ
R125_V1
a
b
c
RZQG100~
RZQSG140_Y1
a
b
c
RZQ
R125_Y1
a
b
c
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.
6.6.2
Precautions when charging refrigerant
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.6.3
Definitions: L1~L7, H1, H2
Pair
(a)
H1
L1
Twin
(a)
H1
H2
L1
L2
L3
