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WARNING
The unit is equipped with a refrigerant
leak detection system for safety.
To be effective, the unit MUST be
electrically powered at all times after
installation, except for maintenance.
CAUTION
NEVER expose little children, plants or
animals directly to the airflow.
CAUTION
Do NOT touch the heat exchanger fins.
These fins are sharp and could result
in cutting injuries.
4
About the system
The VRV 5-S uses R32 refrigerant which is rated as A2L and is
mildly flammable. For compliance with the requirements for
enhanced tightness refrigerating systems and IEC60335-2-40 the
installer must take extra measures. For more information, see
"2.1 Instructions for equipment using R32
The indoor unit part of this VRV 5-S heat pump system can be used
for heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
WARNING
▪ Do NOT modify, disassemble, remove, reinstall or
repair the unit yourself as incorrect dismantling or
installation may cause an electrical shock or fire.
Contact your dealer.
▪ In case of accidental refrigerant leaks, make sure there
are no naked flames. The refrigerant itself is entirely
safe, non-toxic and mildly flammable, but it will
generate toxic gas when it accidentally leaks into a
room where combustible air from fan heaters, gas
cookers, etc. is present. Always have qualified service
personnel confirm that the point of leakage has been
repaired or corrected before resuming operation.
WARNING
The unit is equipped with a refrigerant leak detection
system for safety.
To be effective, the unit MUST be electrically powered at
all times after installation, except for short service periods.
NOTICE
Do NOT use the system for other purposes. In order to
avoid any quality deterioration, do NOT use the unit for
cooling precision instruments, food, plants, animals, or
works of art.
NOTICE
For future modifications or expansions of your system:
A full overview of allowable combinations (for future
system extensions) is available in technical engineering
data and should be consulted. Contact your installer to
receive more information and professional advice.
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752781-1B – 2024.02
refrigerant" [ 4 8].
4.1
System layout
INFORMATION
The following figure is an example and may NOT
completely match your system layout
a
b
j
c
h
e
d
g
e
i
a
Heat pump outdoor unit
b
Safety valve unit (SV)
c
VRV direct expansion (DX) indoor unit
d
VRV direct expansion (DX) indoor unit (direct connection
from outdoor to indoor)
e
Remote controller in normal mode
f
Remote controller in alarm only mode
g
Remote controller in supervisor mode (mandatory in
some situations)
h
Centralised controller (optional)
i
Option PCB (optional)
j
Cool/heat changeover remote control switch (optional)
Refrigerant piping
Interconnection and user interface wiring
Direct connection of indoor units to the outdoor unit
5
User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
This operation manual offers a non-exhaustive overview of the main
functions of the system.
Detailed information on required actions to achieve certain functions
can be found in the dedicated installation and operation manual of
the indoor unit.
Refer to the operation manual of the installed user interface.
6
Operation
6.1
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
Cooling
Outdoor
–5~52°C DB
temperature
Indoor
21~32°C DB
temperature
14~25°C WB
Indoor humidity
(a)
To avoid condensation and water dripping out of the unit. If the
temperature or the humidity is beyond these conditions, safety
devices may be put in action and the air conditioner may not
operate.
Above operation range is only valid in case direct expansion indoor
units are connected to the VRV 5-S system.
4 About the system
c
c
e
e
f
i
i
Heating
–20~21°C DB
–20~15.5°C WB
15~27°C DB
(a)
≤80%
Installation and operation manual
11
i
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Troubleshooting
