Daikin SV1A25AJV1B - To Determine the Required Safety Measures

13 | Special requirements for R32 units
Installer and user reference guide
45
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
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 "13.3 To
determine the required safety measures" [4 45]. 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 "16.5 To connect the external
outputs"[498].
Piping requirements
CAUTION
Piping MUST be installed according to instructions given in "15 Piping
installation" [4 80]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
Low temperature solder alloys shall not be used for pipe connections.
For piping installed in the occupied space, make sure that the piping is protected
against accidental damage. Piping should be checked according to the procedure
as mentioned in the installation and operation manual delivered with the outdoor
unit.
13.3 To determine the required safety measures
Step 1 – Determine the total amount of refrigerant in the system. See the
installation and operation manual delivered with the outdoor unit.
Step2 – Determine the area of the room in which the SV unit is installed:
The room area can be determined by projecting the walls, doors and partitions to
the floor and calculating the enclosed area.
Spaces connected by only false ceilings, ductwork, or similar connections are not
considered a single space.
Step 3 – Use the graphs or tables below to determine the required safety
measures for the SV unit.