4 About the system
Installation and operation manual
9
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1B – 2021.12
CAUTION: Pay attention to the fan!
It is dangerous to inspect the unit while
the fan is running.
Make sure to turn OFF the main switch
before executing any maintenance
task.
CAUTION
After a long use, check the unit stand
and fitting for damage. If damaged, the
unit may fall and result in injury.
WARNING
NEVER replace a fuse with a fuse of a
wrong ampere ratings or other wires
when a fuse blows out. Use of wire or
copper wire may cause the unit to
break down or cause a fire.
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 non-
combustible, but it will generate toxic
gas when it accidentally leaks into a
room where combustion 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
Stop operation and shut OFF the
power if anything unusual occurs
(burning smells etc.).
Leaving the unit running under such
circumstances may cause breakage,
electrical shock or fire. Contact your
dealer.
WARNING
▪ The refrigerant in the system is safe
and normally does NOT leak. If the
refrigerant leaks in the room, contact
with a fire of a burner, a heater or a
cooker may result in 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 system until a
service person confirms that the
portion where the refrigerant leaks is
repaired.
CAUTION
NEVER expose little children, plants or
animals directly to the airflow.
4
About the system
The VRV IV heat pump for indoor installation can be used for
heating/cooling applications.
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.
4.1
System layout
d
d
c
c
a
b
VRV DX
VRV DX
VRV DX
EKEXV
AHU
d
d
1
2
1
In case of VRV DX indoor units
2
In case of VRV DX indoor units combined with an air
handling unit
a
Heat exchanger unit
b
Compressor unit
c
Refrigerant piping
d
User interface (dedicated depending on indoor unit type)
VRV DX
VRV direct expansion (DX) indoor unit
EKEXV
Expansion valve kit
AHU
Air handling unit
