2 Safety instructions
Installation manual
4
D035A1/4AA + D035A4AA
Wall-mounted condensing boiler
3P469346-5E – 2017.06
Pn (80/60)
Pn (50/30)
Qn
D (
Δ
T=30 K)
PMS
PMW
Nox
kW
kW
kW
l/min
bar
MPa
bar
MPa
/
/
XXXX-XX
PIN:
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
a
Product number
b
Electrical supply
c
Maximum electrical power consumption
d
Degree of protection
e
Nominal heat output range @ 80/60
f
Nominal heat output range @ 50/30
g
Nominal heat input range
h
Hot water amount @ DT=30
i
NOx class
j
Maximum central heating pressure (bar)
k
Maximum central heating pressure (MPa)
l
Maximum domestic hot water pressure (bar)
m
Maximum domestic hot water pressure (MPa)
n
Country of destination(s)
o
Country of origin
p
Serial number
q
Appliance type
r
Efficiency class
s
Gas category
t
Gas type and supply pressure
u
Product type
v
PIN number
1.3
Symbols on the package
This is a fragile piece of equipment: Please provide a dry
storage space for the unit.
This is a fragile piece of equipment: Please be very careful
not to drop.
Store the unit in a flat position as indicated on the box.
No more than five boxes should be stacked on top of each
other.
2
Safety instructions
These instructions are exclusively designed for qualified competent
persons.
▪ Work on gas units must only be carried out by a qualified gas
fitter.
▪ Work on electrical equipment must only be carried out by a
qualified electrician.
▪ The system must be commissioned by a qualified competent
person.
WARNING
A qualified person shall explain the operating principles
and the use of the unit to the user. The user is not allowed
to perform any modifications, maintenance or repairs on
the unit, unless otherwise stated, or have the such
performed by unauthorised third parties. Otherwise, the
unit warranty becomes void.
DANGER
Isolate the boiler from the power mains before working on
it.
WARNING
Unit installation, commissioning, repair, configuration and
service must be performed by qualified competent persons
in accordance with local standards and regulations.
Incorrect installation of this unit may harm the user and his/
her surroundings. The manufacturer is not responsible for
any malfunctions and/or damage that may occur this way.
DANGER
Flammable fluids and materials must be stored at least
1 metre away from the boiler.
WARNING
To ensure faultless operation, long term availability of all
functions and long working life of the boiler only use
original spares.
3
About the unit
This Daikin unit is a wall-mounted gas-fired condensing boiler that
can supply heat to central heating systems, as well as supply
domestic hot water. Depending on settings, it is possible to use the
unit solely for hot water or solely for central heating. Hot water
supply type can be instantaneous or by means of a hot water
storage tank. The type of the boiler can be recognised from the
model name written on the identification label. See table below:
Model
Type
Domestic hot water
supply
Filling loop
D2CND028A1AA D2CND028
Instantaneous
Internal
D2CND028A4AA D2CND028
Instantaneous
External
D2CND035A1AA D2CND035
Instantaneous
Internal
D2CND035A4AA D2CND035
Instantaneous
External
D2TND028A4AA
D2TND028
Storage tank
External
D2TND035A4AA
D2TND035
Storage tank
External
A control unit, which contains a user interface, controls the ignition,
safety systems, and other actuators. User interaction is provided via
that user interface, which is composed of an LCD screen, push
buttons, and two dials, and which is located on the front cover of the
unit.
3.1
Safety systems
The unit is equipped with several safety systems, to protect it against
dangerous conditions:
Flue safety system
: This is controlled by the flue gas temperature
sensor located on the flue outlet part of the boiler. It is activated
when the flue gas temperature exceeds safety limits.
Overheating safety system
: This is controlled by the safety limiting
thermostat. It is located on the main heat exchanger and stops the
unit when the flow temperature reaches 100°C, to avoid boiling of
the water, which may damage the unit.
