12 Special requirements for R32 units
Installation and operation manual
17
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
11.1.3
To remove the accessories from the
outdoor unit
1
Remove the service cover. See
4P590088-1A
1×
1
1×
2×
b
1×
a
c
1×
1×
d
e
f
3×
PH2
8
mm
1×
1×
1×
1×
1×
g
h
i
j
k
2
3
4
a
General safety precautions
b
Outdoor unit installation manual
c
Caution label
d
Fluorinated greenhouse gases label
e
Additional refrigerant charge label
f
Cable tie
g
Liquid line piping — bend
h
Liquid line piping — short
i
Liquid line piping — long
j
Gas line piping — bend
k
Gas line piping
12
Special requirements for R32
units
12.1
Installation space requirements
WARNING
If the appliance contains R32 refrigerant, the floor area of
the room in which the appliance is stored shall be at least
98.3 m².
NOTICE
▪ Protect pipework from physical damage.
▪ Keep the pipework installation to a minimum.
12.2
System layout requirements
The VRV 5-S uses R32 refrigerant which is rated as A2L and is
mildly flammable.
To comply with the requirements of enhanced tightness refrigerating
systems of the IEC 60335-2-40, this system is equipped with shut-off
valves in the outdoor unit and an alarm in the remote controller. In
case the requirements of this manual are followed, no additional
safety measures are needed.
A big range of charge and room area combinations is allowed thanks
to the countermeasures that are implemented in the unit by default.
Follow the installation requirements below to ensure that the
complete system is compliant to legislation.
Outdoor unit installation
The outdoor unit must be installed outside. For indoor installation of
the outdoor unit, additional measures can be necessary to comply
with the applicable legislation.
A terminal for external output is available in the outdoor unit. This
SVS output can be used when additional countermeasures are
needed. The SVS output is a contact on terminal X2M that closes in
case a leak is detected, failure or disconnection of the R32 sensor
(located in the indoor unit).
For more information about the SVS
output, see
32].
Indoor unit installation
NOTICE
If one or more rooms are connected to the unit using a
duct system, make sure air inlet AND outlet are connected
directly to the same room by ducting. Do NOT use spaces
such as a false ceiling as a duct for the air inlet or outlet.
For installation of the indoor unit, refer to the installation and
operation manual delivered with the indoor unit. For compatibility of
indoor units refer to the latest version of the technical data book of
this unit.
The total amount of refrigerant in the system shall be less than or
equal to the maximum allowed total refrigerant amount. The
maximum allowed total refrigerant amount depends on the area of
the rooms being served by the system and the rooms in the lowest
underground floor.
See
"12.3 To determine the charge limit"
19] to check if your
system meets the requirement for charge limitation.
An optional output PCB for the indoor unit can be added to provide
output for external device. The output PCB will trigger in case a leak
is detected, the R32 sensor fails or when the sensor is disconnected.
For exact model name see option list of the indoor unit. For more
information about this option, refer to the installation manual of the
optional output PCB.
Piping requirements
Piping must be installed according to instructions given in
24]. Only mechanical joints (e.g. braze+flare
connections) that are compliant with the latest version of ISO14903
can be used.
For piping installed in the occupied space, please make sure that the
piping is protected against accidental damage. Piping should be
checked according to procedure as mentioned in
Remote controller requirements
b
a
c
d
f
h
e
d
c
b
b
c
d
g
h
h
a
Heat pump outdoor unit
b
Refrigerant piping
c
VRV direct expansion (DX) indoor unit
d
Remote controller in normal mode
e
Remote controller in alarm only mode
f
Remote controller in supervisor mode (mandatory in
some situations)
g
Centralised controller (optional)
h
Option PCB (optional)
