4 Installation
Installation manual
12
D2CND024A1/4AB + D2TND012~024A4AB
Wall-mounted condensing boiler
3P469346-3N – 2019.11
For use of any additive in the central heating system, please refer to
the instructions of their manufacturers to ensure above functionality
and compatibility.
Water softening for domestic water circuit is recommended if
hardness of supply water is higher than 20°fH, in order to prevent
damage on boiler.
WARNING
Mixing inappropriate additives with the central heating
circuit water can result in efficiency loss in the boiler or
damage to the boiler and the other central heating circuit
elements. Daikin accepts no liability for any such damage
or ineffectiveness caused by using inappropriate additive.
4.6
Underfloor heating requirements
Underfloor heating systems apparently require higher flow rate and
lower ΔT. This boiler can be connected to an underfloor heating
system without use of a second pump and low loss header because
of its high pump capacity. Direct connection is possible when the
system is well designed and pressure loss is low enough.
When the boiler is connected to underfloor heating installation, the
maximum central heating set temperature must be limited to 50°C
and the pump operation temperature difference must be adjusted to
10 Kelvin in the service settings menu. To change this setting, refer
to the servicing instructions.
WARNING
Make sure parameter changes explained above are done
to avoid discomfort of the user.
4.7
Residual pump lift graph
The residual pump lift graph shows the amount of pump lift (mbar)
that remains for the central heating circuit.
0
0
100
200
300
400
500
600
700
800
200
400
600
800
1000
1200
1400
1600
1800
A (mbar)
B (l/h)
A
Residual pump lift (mbar)
B
Flow (l/h)
4.8
Connections
NOTICE
During installation, do not loosen or remove any screw
from bottom plate.
4.8.1
Piping connections
Piping connections of models D2CND024A1AB and
D2CND024A4AB
Below, find the piping connections of the unit.
E
H
D
B
A
C
F
G
A
Central heating return connection, 3/4"
B
Domestic cold water inlet connection, 1/2"
C
Condensate trap discharge
D
Domestic hot water outlet connection, 1/2"
E
Central heating supply connection, 3/4"
F
Gas inlet connection, 3/4"
G
Filling valve (for D2CND024A1AB)
H
Safety valve discharge
Below, find the piping connections of the unit.
e
h
d
b
a
c
f
g
a
Central heating return connection, 3/4"
b
Domestic cold water inlet connection, 1/2"
c
Condensate trap discharge
d
Domestic hot water outlet connection, 1/2"
e
Central heating supply connection, 3/4"
f
Gas inlet connection, 3/4"
g
Filling valve
h
Safety valve discharge
B
F
D
a
b
E
A
Summary of Contents for D2CND024A4AB
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