14 About the system
Installer and user reference guide
47
RXYSQ4~6TAY1B
VRV IV-S system air conditioner
4P482257-1 – 2017.03
For the user
14
About the system
The indoor unit part of VRV IV-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.
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.
INFORMATION
▪ Combination of VRV DX and RA DX indoor units is not
allowed.
▪ Combination of RA DX and AHU indoor units is not
allowed.
▪ Combination of RA DX and aircurtain indoor units is not
allowed.
In general following type of indoor units can be connected to a VRV
IV-S heat pump system (not exhaustive list, depending on outdoor
unit model and indoor unit model combinations):
▪ VRV direct expansion indoor units (air to air applications).
▪ RA direct expansion indoor units (air to air applications).
▪ AHU (air to air applications): EKEXV-kit is required.
▪ Aircurtain -Biddle- (air to air applications).
Airhandling unit connection in pair to VRV IV-S heat pump outdoor
unit is supported.
Airhandling unit connection in multi to VRV IV-S heat pump outdoor
unit is supported, even combined with VRV direct expansion indoor
unit(s).
For more specifications, see technical engineering data.
14.1
System layout
g
d
d
c
c
f
e
b
a
g
f
e
a
VRV IV-S Heat pump outdoor unit
b
Refrigerant piping
c
VRV direct expansion (DX) indoor unit
d
User interface (dedicated depending on indoor unit type)
e
BP box (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 (wireless, dedicated depending on indoor
unit type)
15
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 will give 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.
16
Before operation
WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
CAUTION
It is not good for your health to expose your body to the air
flow for a long time.
CAUTION
To avoid oxygen deficiency, ventilate the room sufficiently
if equipment with burner is used together with the system.
CAUTION
Do not operate the system when using a room fumigation-
type insecticide. This could cause the chemicals to
become deposited in the unit, which could endanger the
health of those who are hypersensitive to chemicals.
This operation manual is for the following systems with standard
control. Before initiating operation, contact your dealer for the
operation that corresponds to your system type and mark. If your
installation has a customised control system, ask your dealer for the
operation that corresponds to your system.
Operation modes (depending on indoor unit type):
▪ Heating and cooling (air to air).
▪ Fan only operation (air to air).
Dedicated functions exist depending on the type of indoor unit, refer
to dedicated installation/operation manual for more information.
17
Operation
17.1
Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
