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Special requirements for R32 units
Installer and user reference guide
73
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
Note:
For more information, see
"21.1.9 Indoor unit field setting"
16.4.2 Alarm
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 only use 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
different room than where it is installed, a remote controller is required in
both installed and served room. 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 the SV 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 SV units and indoor units, SVS is only triggered when its
own R32 sensor detects a leak. For more information on the SVS output signal,
see
"20.7 To connect the external outputs"
▪
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.
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