12 Special requirements for R32 units
Installation and operation manual
13
SV1ASV4~8A14AJV1B
VRV 5 safety valve unit
4P709466-1 – 2023.09
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
11.4
Combining units and options
INFORMATION
Certain options may NOT be available in your country.
11.4.1
Possible options for the SV unit
INFORMATION
All possible options are mentioned in the option list below.
For more information about an option, see the installation
and operation manual of the option.
Duct connection kit (EKBSDCK)
This kit is required when you install ducting on the air inlet side. See
the examples in
"13.2 Possible configurations"
24] and
This kit can also be used when measuring the airflow. See
"17.2.3 About measuring the airflow rate"
Joint kit (EKBSJK)(only for SV4~8A)
This kit is required when you make a connection with e.g.
FXMA200A and FXMA250A. When using the joint kit, change the
DIP switch settings. See
"15.5 To set the DIP switches"
Drain up kit (K-KDU303KVE)
▪ Only this optional drain up kit can be used on the SV unit. Do NOT
use another drain pump kit.
▪ Do NOT route the interconnection wiring of the SV unit together
with the power supply wire of the drain up kit.
▪ Route the power supply wire and relay harness of the drain up kit
inside the SV unit as shown in the figure below.
▪ Position the ferrite core on the relay harness of the drain up kit
inside the switch box of the SV unit.
c
SV1~8A
X1M
X3M
X2M
SV6~8A
SV4~8A
c
SV1A
SV6~8=X4M
SV4A=X3M
X3M
e
X15A
f
g
c
c
c c b
c
d
c
a
a
Power supply for the SV unit
b
Interconnection wiring
c
Cable tie
d
Power supply of the drain up kit
e
Relay harness of the drain up kit
f
Relay connector of the drain up kit
g
Ferrite core
12
Special requirements for R32
units
12.1
Installation space requirements
NOTICE
▪ The pipework shall be securely mounted and guarded
protected from physical damage.
▪ Keep the pipework installation to a minimum.
12.2
System layout requirements
The VRV 5 heat pump uses R32 refrigerant, which is rated as A2L
and is mildly flammable.
To comply with the requirements of enhanced tightness refrigerating
systems of the IEC 60335-2-40, this system is equipped with shut-off
valves in the SV unit and an alarm in the remote controller.
The safety measures that are needed for the SV unit are explained
in more detail below. If they are followed, no additional safety
measures for the SV unit are required. Carefully follow the
installation requirements for the SV unit as explained in this manual.
Follow the installation requirements described in the outdoor unit
and indoor unit installation and operation manuals to ensure that the
complete system is compliant with legislation.
Outdoor unit installation
For installation of the outdoor unit, see the installation and operation
manual delivered with the outdoor unit.
Indoor unit installation
Room area limitations apply for the indoor units. Details are
explained in the installation and operation manual delivered with the
outdoor unit. For installation of the indoor unit, see the installation
and operation manual delivered with the indoor unit. For
compatibility of indoor units, see the latest version of the technical
data book of the outdoor unit.
Remote controller requirements
To install the remote controller, see the installation and operation
manual delivered with the remote controller. For requirements on
where and how to use a remote controller and which type to use,
see the installation and operation manual delivered with the outdoor
unit.
SV unit installation
Depending on the room size in which the SV unit is installed and the
total amount of refrigerant in the system, other safety measures are
necessary. See
"12.3 To determine the required safety
14]. For the total amount of refrigerant in the system,
see the installation and operation manual delivered with the outdoor
unit.
A terminal for external output is available in the SV unit. This SVS
output can be used when additional countermeasures are needed,
or when the SV unit is installed in a room size where an external
alarm is a sufficient safety measure. The SVS output is a potential-
free contact on terminal X6M that closes in case a refrigerant leak is
detected or if the R32 sensor of the SV unit fails or is disconnected.
For more information about the SVS output, see
36].
Summary of Contents for VRV 5
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