8 Finishing the outdoor unit installation
Installation manual
13
4MWXM-A9
R32 Split series
3P600450-7T – 2022.09
d
(B)
d
(C)
d
(TO TANK)
A
d
(A)
C
TO TANK
B
a
b
c
A
Terminal for room A
B
Terminal for room B
C
Terminal for room C
TO TANK
Terminal for DHW tank
a
Circuit breaker
b
Residual current device
c
Power supply wire
d
Interconnection wire for room (A, B, C, TO TANK)
4
Tighten the terminal screws securely using a Phillips
screwdriver.
5
Check that the wires do NOT disconnect by pulling them lightly.
6
Firmly secure the wire retainer to avoid external stress on wire
terminations.
7
Pass the wiring through the cutout on the bottom of the
protection plate.
8
Make sure that the electrical wiring does NOT make contact
with the gas piping.
2×
1 2 3
a
b
d
c
e
f
1 2
L N
3
a
Terminal for indoor unit A
b
Terminal for indoor unit B
c
Terminal for indoor unit C
d
Terminal for DHW tank
e
Power supply terminal
f
Wire retainer
9
Reattach the switch box cover and the service cover.
8
Finishing the outdoor unit
installation
8.1
To finish the outdoor unit
installation
DANGER: RISK OF ELECTROCUTION
▪ Make sure that the system is earthed properly.
▪ Turn OFF the power supply before servicing.
▪ Install the switch box cover before turning ON the
power supply.
1
Insulate and fix the refrigerant piping and cables as follows:
g
b
a
f
e
c
d
a
Gas pipe
b
Gas pipe insulation
c
Interconnection cable
d
Field wiring (if applicable)
e
Liquid pipe
f
Liquid pipe insulation
g
Finishing tape
2
Install the service cover.
9
Maintenance and service
NOTICE
General maintenance/inspection checklist.
Next to the
maintenance instructions in this chapter, a general
maintenance/inspection checklist is also available on the
Daikin Business Portal (authentication required).
The
general
maintenance/inspection
checklist
is
complementary to the instructions in this chapter and can
be used as a guideline and reporting template during
maintenance.
NOTICE
Maintenance MUST be done by an authorised installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
10
Configuration
INFORMATION
Following field settings are applicable only for direct
expansion indoor units (DX). For the DHW tank field
setting, refer to the installation manual of the DHW tank.
