Daikin VRV 5, Installation And Operation Manual

12 Special requirements for R32 units

Installation and operation manual

22

SV1ASV4~8A14AJV1B

VRV 5 safety valve unit

4P709466-1 – 2023.09

12.5

Combinations of ventilated
enclosure configurations

It is possible to combine different ventilated enclosure configurations
(clusters)  in  the  same  system.  To  do  this,  assign  a  unique  cluster
value to each cluster. All the SV units in the same cluster need to be
assigned the same cluster number.

Example

a

d

b

b

b

d

d

e

e

c

c

c

e

a

Outdoor unit

b

SV unit belonging to cluster 1

c

SV unit belonging to cluster 2

d

SV unit belonging to cluster 3

e

Extraction fan
Interconnection wiring

Field settings of above example

Code

Description

Value

(a)

[2-0]

(b)

Cluster indication

1: enable

[2-1]

(b)

Cluster number

1

2

3

[2-2]

(b)

Cluster configuration

0 (default): parallel

1: series

[2-4]

(c)

Safety measures

1 (default): enable

[2-7]

(c)

Ventilated enclosure

1 (default): enable

(a)

For clusters 1~3.

(b)

Set on ALL main PCBs (A1P and A2P) of the SV unit.

(c)

Set ONLY on the LEFTMOST main PCB (A1P) of the SV unit.

Note: 

For more information, see 

"16.1 Making field settings"

 [

4

 37].

Example

It is not allowed to combine parallel and series configurations within
the same cluster.

a

B

A

a

a

b

a

SV unit

b

Extraction fan

A

Parallel configuration

B

Series configuration
NOT allowed

SV unit test run

Before  SV  unit  operation,  it  is  required  to  perform  a  test  run  that
simulates  a  refrigerant  leak.  See 

"17.2  SV  unit  test  run"

  [

4

  41]  for

more details.

12.6

Combinations of safety measures

It is possible to combine SV units with different safety measures (no
safety  measures,  external  alarm,  natural  ventilation  and  ventilated
enclosure) in the same system.

Example

a

b

b

f

g

d

c

e

h

a

Outdoor unit

b

SV unit with ventilated enclosure safety measure

c

SV unit without safety measures

d

SV unit with external alarm safety measure

e

SV unit with natural ventilation

f

Extraction fan

g

External alarm

h

Natural ventilation
Interconnection wiring

Field settings

SV units (b) with ventilated enclosure safety measure

Code

Description

Value

[2-0]

(a)

Cluster indication

1: enable

[2-1]

(a)

Cluster number

1

[2-2]

(a)

Cluster configuration

0 (default): parallel

[2-4]

(b)

Safety measures

1 (default): enable

[2-7]

(b)

Ventilated enclosure

1 (default): enable

(a)

Set on ALL main PCBs (A1P and A2P) of the SV unit.

(b)

Set ONLY on the LEFTMOST main PCB (A1P) of the SV unit.

SV units (c) without safety measures

Code

Description

Value

[2-0]

(a)

Cluster indication

0 (default): disable

[2-4]

(b)

Safety measures

0: disable

(a)

Set on ALL main PCBs (A1P and A2P) of the SV unit.

(b)

Set ONLY on the LEFTMOST main PCB (A1P) of the SV unit.

SV units (d) with external alarm safety measure

Code

Description

Value

[2-0]

(a)

Cluster indication

0 (default): disable

[2-4]

(b)

Safety measures

1 (default): enable

[2-7]

(b)

Ventilated enclosure

0: disable

(a)

Set on ALL main PCBs (A1P and A2P) of the SV unit.

(b)

Set ONLY on the LEFTMOST main PCB (A1P) of the SV unit.

SV units (e) with natural ventilation

Code

Description

Value

[2-0]

(a)

Cluster indication

0 (default): disable

[2-4]

(b)

Safety measures

0: disable

[2-7]

(b)

Ventilated enclosure

1 (default): enable

(a)

Set on ALL main PCBs (A1P and A2P) of the SV unit.

(b)

Set ONLY on the LEFTMOST main PCB (A1P) of the SV unit.

Note: 

For more information, see 

"16.1 Making field settings"

 [

4

 37].

SV unit test run

Before  SV  unit  operation,  it  is  required  to  perform  a  test  run  that
simulates  a  refrigerant  leak.  See 

"17.2  SV  unit  test  run"

  [

4

  41]  for

more details.