Daikin SV1A25AJV1B - Page 58

13 | Special requirements for R32 units
Installer and user reference guide
58
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
a b b f
d e c e d e
A
e
B
e
a SV unit belonging to outdoor unit A
b SV unit belonging to outdoor unit B
c Extraction fan output terminal – NOT connected
d Extraction fan output terminal – connected
e Interconnection wiring terminal
f Extraction fan
A Outdoor unit A
B Outdoor unit B
Interconnection wiring
Extraction fan output wiring
Allowed
NOT allowed
The option kit EKBSDCK is required each time a duct is connected to the air inlet
(damper side) of the SV unit.
An online tool (VRV Xpress) is available to find the required pressure capacity for
selecting the correct fan size. Only use this online tool for the calculation.
Field settings
Multiple SV units in series – one extraction fan
Code Description Value
[2-0]
(a)
Cluster indication 1: enable
[2-1]
(a)
Cluster number #
(b)
[2-2]
(a)
Cluster configuration 1: series
[2-4]
(c)
Safety measures 1 (default): enable
[2-7]
(c)
Ventilated enclosure 1 (default): enable
(a)
Set on ALL main PCBs (A1P and A2P) of the SV unit.
(b)
Assign a unique cluster number to each cluster in the system. All SV units in the same
cluster MUST have the same cluster number.
(c)
Set ONLY on the LEFTMOST main PCB (A1P) of the SV unit.
Note: For more information, see "17.1Making field settings"[4100].
SV unit test run
Before SV unit operation, it is required to perform a test run that simulates a
refrigerant leak. See "18.3SV unit test run"[4110] for more details.