4 About the system
Installation and operation manual
8
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452190-1D – 2020.10
WARNING
▪ Do NOT modify, disassemble,
remove, reinstall or repair the unit
yourself as incorrect dismantling or
installation may cause an electric
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 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
Stop operation and shut off the
power if anything unusual occurs
(burning smells etc.).
Leaving the unit running under such
circumstances may cause breakage,
electric 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.
4
About the system
The indoor unit part of VRV IV heat recovery system can be used for
heating/cooling applications. The type of indoor unit which can be
used depends on the outdoor units series.
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
Heat pump system
g
c
g
g
h
g
g
c
c
c
d
f
e
i
j
b
a
a
Unit
b
Refrigerant piping
c
VRV DX indoor unit
d
Low temperature (LT) Hydrobox unit
e
Branch selector box (BP*) (required to connect Residential
Air (RA) or Sky Air (SA) direct expansion (DX) indoor units)
f
Residential Air (RA) direct expansion (DX) indoor units
g
User interface
h
Wireless user interface
i
Cool/heat changeover remote control switch
j
Water system connection
Heat recovery system
k
m
e
c
k
l
e
e
e
f
h
b
a
k
l
c
c
k
k
k
j
c
e
i
k
k
c
d
1
3
2
5
4
e
g
c
a
Unit
b
Refrigerant piping
c
Branch selector unit (BS*)
d
Multi branch selector unit (BS*)
e
VRV DX indoor unit
f
Low temperature (LT) Hydrobox unit
g
Cooling only VRV indoor unit
