To Connect Optional Accessories (Wired User Interface, Central User Interface, Wireless Adapter, Etc.); Finishing The Indoor Unit Installation; To Finish The Indoor Unit Installation; Configuration - Daikin CVXM20A3V1B Installation Manual

3 Match wire colours with terminal numbers on indoor and
outdoor unit's terminal blocks and firmly screw wires to the
corresponding terminals.
4 Connect the earth wires to the corresponding terminals.
a Terminal block
b Electrical component block
c Cable clamp
5 Pull the wires to make sure that they are securely attached,
then retain the wires with the cable clamp.
6 Make sure that the wires do not come in contact with the metal
parts of the heat exchanger.
7 In case of connecting to an optional adapter, see
connect optional accessories (wired user interface, central user
interface, wireless adapter,
7.3 To connect optional accessories
(wired user interface, central user
interface, wireless adapter, etc.)
1 Remove the electrical wiring box cover.
2 Connect the optional adapter wire to the S21 connector. To
connect the optional adapter wire to the option, refer to the
installation manual of the optional adapter.
3 Lead the wire as shown in the figure below.
a S21connector
CVXM-A, FVXM-A, CVXM-A9, FVXM-A9, FVXTM-A
Split system air conditioners
3P477070-2P – 2022.09
a
b
c
"7.3 To
etc.)" [ 4 11].
a
b

8 Finishing the indoor unit installation

B Optional adapter wire
4 Close the electrical wiring box cover.
8 Finishing the indoor unit
installation
8.1 To finish the indoor unit
installation
1 After the drain piping, refrigerant piping and the electrical wiring
are finished. Wrap the refrigerant pipes and the interconnection
cable with insulation tape. Overlap at least half the width of the
tape with each turn.
a
e
b
f
c
d
a Interconnection cable
b Gas pipe
c Gas pipe insulation
d Insulation tape
e Liquid pipe
f Liquid pipe insulation
2 Pass the pipes through the wall hole and seal the gaps with
putty.
9

Configuration

INFORMATION
In case 2 indoor units are installed in 1 room, set different
addresses for 2 user interfaces. For procedure refer to the
installer reference guide, for location see
document" [ 4 2].
10

Commissioning

NOTICE
General commissioning
commissioning instructions in this chapter, a general
commissioning checklist is also available on the Daikin
Business Portal (authentication required).
The general commissioning checklist is complementary to
the instructions in this chapter and can be used as a
guideline and reporting template during commissioning and
hand-over to the user.
NOTICE
ALWAYS operate the unit with thermistors and/or pressure
sensors/switches. If NOT, burning of the compressor might
be the result.
10.1

To perform a test run

Prerequisite: Power supply MUST be in the specified range.
Prerequisite: Test run may be performed in cooling or heating
mode.
Prerequisite: Test run should be performed in accordance with the
operation manual of the indoor unit to make sure that all functions
and parts are working properly.
"1.1 About this
checklist. Next to the
Installation manual
11