12 Special requirements for R32 units
Installation and operation manual
18
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
For installation of the remote controller, please refer to the
installation and operation manual delivered with the remote
controller. Each indoor unit must be connected with a R32 safety
system compatible remote controller (e.g. BRC1H52/82* or later
type). These remote controllers have implemented safety measures
that will warn the user visually and audibly in case of a leak.
For installation of the remote controller, it is mandatory to follow the
requirements.
1
Only a safety system compatible remote controller can be used.
See technical data sheet for remote controller compatibility (e.g.
BRC1H52/82*).
2
Each indoor unit must be connected to a separate remote
controller. In case indoor units are operating under group
control, it is possible to use only one remote controller per
room.
3
The remote controller put in the room served by the indoor unit
must be in 'fully functional' or 'alarm only' mode. In case the
indoor unit is serving a room other than where it is installed, a
remote controller is required in both the installed and served
room (some relaxations are possible, see examples below). For
details about the different remote controller modes and how to
set up, please check the note below or refer to the installation
and operation manual delivered with the remote controller.
4
For buildings where sleeping facilities are offered (e.g. hotel),
where persons are restricted in their movements (e.g.
hospitals), an uncontrolled number of persons is present or
buildings where people are not aware of the safety precautions
it is mandatory to install one of the following devices at a
location with 24-hour monitoring:
▪ a supervisor remote controller
▪ or a centralised controller. E.g., iTM with external alarm via
WAGO module, iTM with built-in alarm, …
Note:
The remote controllers with built-in alarm will generate a
visible and audible warning. E.g. the BRC1H52/82* remote
controllers can generate an alarm of 65 dB (sound pressure,
measured at 1 m distance of the alarm). Sound data is available in
the technical data sheet of the remote controller.
The alarm should
always be 15 dB louder than the background noise of the room.
A field supply external alarm with a sound output 15 dB louder than
the background noise of the room MUST be installed in the following
cases:
▪ The sound output of the remote controller is not sufficient to
guarantee the 15 dB difference. This alarm can be connected to
the SVS
output channel of the outdoor unit or to the optional
output PCB of the indoor unit of that specific room. The outdoor
SVS will trigger for any R32 leak detected in the complete system.
For indoor units, the optional output is only triggered when its own
R32 sensor detects a leak. For more information on the SVS
output signal, see
"16.3 To connect the electrical wiring to the
31]. For more information on the optional output
PCB of the indoor unit, please refer to the installer and user
reference guide of the indoor unit.
▪ A centralised controller without built-in alarm is used, or the sound
output of the centralised controller with built-in alarm is not
sufficient to guarantee the 15 dB difference. Please refer to the
installation manual of the centralised controller for the correct
procedure to install the external alarm.
Note:
Depending on the configuration, the remote controller is
operable in three possible modes. Each mode offers different
controller functionality. For detailed information about setting the
operation mode of the remote controller and its function, please refer
to the installer and user reference guide of the remote controller.
Mode
Function
Fully functional
The controller is fully functional. All normal
functionality is available.
This controller can
be master or slave.
Alarm only
The controller only acts as leak detection
alarm (for a single indoor unit). No
functionality is available. The remote
controller should always be put in the same
room as the indoor unit.
This controller can
be master or slave.
Supervisor
The controller only acts as leak detection
alarm (for the whole system, i.e. multiple
indoor units and their respective controllers).
No other functionality is available. The remote
controller should be placed at a supervised
location.
This remote controller can only
be the slave.
Note:
In order to add a supervisor remote
controller to the system, a field setting should
be set on both remote controller and outdoor
unit.
Note:
Incorrect use of remote controllers can result in occurrence of
error codes, non-operating system or system that is not compliant to
applicable legislation.
Note:
Some centralised controllers can also be used as supervisor
remote controller. For further details on installation, please refer to
the installation manual of the centralised controllers.
Examples
NOT OK
OK
Case
1
a
c
b
a
d
b
Remote controller is not R32 safety system
compatible
2
a
b
b
b
e
a
b
d
b
d
b
d
Indoor units without remote controller are not
allowed
