5 | About the system
Installer and user reference guide
25
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
5 About the system
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.
5.1 System layout
INFORMATION
The following figure is an example and may NOT completely match your system
layout
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
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