Daikin FXSN50A2VEB, Installation And Operation Manual

14 Commissioning

Installation and operation manual

20

FXSN50~112A2VEB

CO

₂

 Conveni-Pack: indoor unit

4P602815-1C – 2020.05

IN/D OUT/D

F

1

F

2

F

1

F

2

Control box

P

1

P

2

F

1

P

1

P

2

F

2

T

1

T

2

P

1

P

2

F

1

F

2

T

1

T

2

P

1

P

2

F

1

F

2

T

1

T

2

P

1

P

2

F

1

F

2

T

1

T

2

P

1

P

2

P

1

P

2

N

N

L

L

N

L

L N

L N

b

c

e

d

a

a

Outdoor unit

b

Indoor unit

c

User interface (controls 3 indoor units)

d

Most downstream indoor unit

e

For use with 2 user interfaces

▪

Setting  master  unit  (Cooling/Heating  masterhood).

  In  case  of

group  control,  connect  the  user  interface  wiring  directly  to  the
master unit. Do not connect user interfaces directly to slave units.
Slave units are restricted in their operation by the master unit (e.g.
1  outdoor  unit  does  not  allow  for  1  indoor  unit  to  run  in  cooling
operation  while  another  runs  in  heating  operation).  For  setting
using the user interface, refer to the manual or reference guide of
the user interface.

INFORMATION

In  case  of  group  control,  it  is  not  necessary  to  assign  a
group  address  to  the  indoor  unit.  The  group  address  is
automatically set when the power is turned on.

13.3

To connect appropriate measures
for appliances filled with CO

₂

Appropriate  measures  are  field  supplied.  For  details  on  how  to
connect  wiring  to  the  appropriate  measures,  refer  to  the
documentation of the used appropriate measures.

1

Determine  the  minimum  number  of  appropriate  measures  for
the  room  in  accordance  with 

"11.1.2  Additional  installation  site

requirements for CO

₂

 refrigerant" 

[

4

 13].

2

Connect  the  appropriate  measures  to  the  indoor  unit  terminal
block, symbols T1, T2.

3

If  the  CO

2

  refrigerant  leak  detector  is  installed, 

enable  the

function  for  refrigerant  leak  detection

  as  described  in

"15.1 Field setting" 

[

4

 21].

P1P2

F1 F2 T1 T2

P1P2

P1P2

P1P2

F1 F2 T1 T2

P1P2

F1 F2 T1 T2

P1P2

c

b

a

a

a

b

b

d

e

f

    13‒1 Example  of  appropriate  measures  connection  layout  for

one room

a

Terminal strip on the indoor unit

b

Terminal P1/P2 on the user interface

c

Control panel (field supply)

d

CO

2 

 refrigerant leak detector (field supply) in combination

with a safety alarm (field supply)

e

Ventilation (natural or mechanical) (field supply)

f

Shut-off valves (field supply)

14

Commissioning

NOTICE

ALWAYS operate the unit with thermistors and/or pressure
sensors/switches. If NOT, burning of the compressor might
be the result.

14.1

Checklist before commissioning

After  the  installation  of  the  unit,  first  check  the  items  listed  below.
Once all checks are fulfilled, the unit must be closed. Power-up the
unit after it is closed.

You  read  the  complete  installation  and  operation
instructions,  as  described  in  the 

installer  and  user

reference guide

.

The 

indoor unit

 is properly mounted.

The 

outdoor unit

 is properly mounted.

Make  sure 

drain  piping

  is  properly  installed,  insulated

and drainage flows smoothly. Check for water leaks.

The 

ducting

 is properly installed and insulated.

The 

refrigerant  pipes

  (gas  and  liquid)  are  installed

correctly and thermally insulated.

There are NO 

refrigerant leaks

.

There are NO 

missing phases

 or 

reversed phases

.

The  system  is  properly 

earthed

  and  the  earth  terminals

are tightened.

The 

fuses

  or  locally  installed  protection  devices  are

installed according to this document, and have NOT been
bypassed.