System Layout Requirements - Daikin RXYSA4A7V1B Installer And User Manual

3.1.2 System layout requirements

RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1A – 2020.07
The VRV 5-S 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 outdoor
unit and an alarm in the remote controller. In case the requirements of this manual
are followed, no additional safety measures are needed.
A big range of charge and room area combinations is allowed thanks to the
countermeasures that are implemented in the unit by default.
Follow the installation requirements below to ensure that the complete system is
compliant to legislation.
Outdoor unit installation
The outdoor unit has to be installed outside. For indoor installation of the outdoor
unit, additional measures can be necessary to comply with the applicable
legislation.
A terminal for external output is available in the outdoor unit. This SVS output can
be used when additional countermeasures are needed. The SVS output is a contact
on terminal X2M that closes in case a leak is detected, failure or disconnection of
the R32 sensor (located in the indoor unit).
For more information about the SVS output, see
4
outputs" [ 110].
Indoor unit installation
For installation of the indoor unit, refer to the installation and operation manual
delivered with the indoor unit. For compatibility of indoor units refer to the latest
version of the technical data book of this unit.
The total amount of refrigerant in the system shall be less than or equal to the
maximum allowed total refrigerant amount. The maximum allowed total
refrigerant amount depends on the area of the rooms being served by the system
and the rooms in the lowest underground floor.
See "3.1.3 To determine the charge limitations"
meets the requirement for charge limitation.
An optional output PCB for the indoor unit can be added to provide output for
external device. The output PCB will trigger in case a leak is detected, the R32
sensor fails or when the sensor is disconnected. For exact model name see option
list of the indoor unit. For more information about this option, refer to the
installation manual of the optional output PCB.
Piping requirements
Piping must be installed according to instructions given in
4
installation" [ 77]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
For piping installed in the occupied space, please make sure that the piping is
protected against accidental damage. Piping should be checked according to
procedure as mentioned in
3 Specific installer safety instructions
|
"18.3 Checking the refrigerant
"20.3 To connect the external
4
[ 23] to check if your system
"18 Piping
4
piping" [ 88].
Installer and user reference guide
19