4 Installation
Installation manual
13
D2C20ND0 D2C24ND035A5AA
Wall-mounted condensing boiler
3P469346-10J – 2018.05
a
b
3×0.75 TTR / 230 V
H05RN
1~ 230 V
50 Hz
Cat. III
a
Safety breaker (2 A)
b
Earth leakage safety breaker
Cat. III
Overvoltage category III
▪ Electrical work should be carried out in accordance with the
installation manual and the national electrical wiring rules or code
of practice.
▪ Insufficient capacity or incomplete electrical work may cause
electrical shock or fire.
▪ A main switch or other means for disconnection, having a contact
separation in all poles providing full disconnection under
overvoltage category III, shall be installed in the fixed wiring.
▪ Be sure to establish an earth. Do not earth the unit to a utility pipe,
lightning arrester, or telephone earth.
Incomplete earth may
cause electrical shock and fire.
▪ While the electrical connections are being done, energy should
not be on the main power supply cable and the main switch
should be closed.
▪ During the electrical connections, make sure that the cables are
well-fixed and are connected firmly and tightly.
▪ Power supply cable must be equivalent to
H05RN-F (2451EC57)
as minimum requirement.
Observe the point mentioned below when wiring to the power supply
terminal board.
b
a
L
N
a<b
WARNING
Do not interchange the supply conductors L and the
neutral conductor N.
DANGER
Do not use gas and water pipes for earthing purposes and
ensure that they have not been used for this purpose
before. Failure to observe this relieves the manufacturer of
any responsibility.
4.8.5
Guidelines when connecting options to
the boiler
DANGER
X2M connector has 230 V AC.
Optional equipment is connected to the connectors, which are
located on the outside of the switch box. Do not open the switch box
to connect optional equipment.
Temperature control units
Connector
Connection
Solar NTC sensor
X1M
1-2
Daikin room thermostat
X1M
3-4
Outdoor sensor
X1M
5-6
Domestic hot water storage tank
sensor
X1M
7-8
Temperature control units
Connector
Connection
External power output (230 V AC)
X2M
3-4
On-Off room thermostat
X2M
5-6
(1-2)
(3-4)
(5-6)
(7-8)
8
1
X2M
Wiring of the options that are to be connected to the X2M connector
must pop out from the inside of the unit via cable glands. Cable
glands that are sent with the unit must be assembled to the bottom
sheet of the boiler in case connection of these options. Below, you
can see the cable glands placement.
PG9
PG7 PG7
PG9
Holes on the bottom sheet that are reserved for cable glands are
covered with insulation material. The insulation material must be
bored if glands are to be used.
Note:
Unit must be opened to mount cable glands. See
