4 Installation
Installation manual
13
D2CND024A1/4AB + D2TND012~024A4AB
Wall-mounted condensing boiler
3P469346-3N – 2019.11
Valve
Strainer
Tee connection
Double check valve + filling hose
Disconnector
a
Isolation valve on domestic hot water supply pipe is
tentative.
b
External filling group used with model D2CND024A4AB.
Use a disconnector or a double check valve according to
local regulations.
Isolation valves and strainers should be used just before the
appliance piping inlet as shown in figure above.
Ensure that necessary gaskets are placed.
Note:
Optional Daikin connection kit can be used and it is
recommended to use it.
Piping connections of models D2TND012A4AB,
D2TND018A4AB and D2TND024A4AB
Below, find the piping connections of the unit.
B
D
C
F
G
E
A
A
Central heating return connection, 3/4"
B
Storage tank return connection, 3/4"
C
Condensate trap discharge
D
Storage tank supply connection, 3/4"
E
Central heating supply connection, 3/4"
F
Gas inlet connection, 3/4"
G
Safety valve discharg
A
a
B
F
D
E
Valve
Strainer
Tee connection
Double check valve + filling hose
Disconnector
a
External filling group used with models D2TND012A4AB,
D2TND018A4AB and D2TND024A4AB. Use a
disconnector or a double check valve according to local
regulations.
If the boiler will only be used for central heating, storage tank
connections should be blinded.
Isolation valves and strainers should be used just before the
appliance piping inlet as shown in figure above. Boiler is filled with
external fresh water supply.
Ensure that necessary gaskets are placed.
Note:
Optional Daikin connection kit can be used and it is
recommended to use it.
4.8.2
Guidelines when connecting the gas
piping
This unit is designed to be operated with natural gas or LPG. The
preset gas type and the designated gas inlet pressure are indicated
on the boiler's identification label.
WARNING
Only qualified persons are allowed to connect the gas
piping. The gas inlet pipe diameter must be selected
according to the applicable legislation, standards, and
regulations.
Connect the gas piping according to applicable legislation of the
country of destination and the regulations of the gas supply
company.
Connect the gas supply piping without tension to the gas pipe
connection ("Connection F", see
12]).
WARNING
After the gas connection is made, the gas line must be
tested for leakage while the gas line to the boiler is open
(see
"5.3 To check for gas leakage"
27]).
In case gas piping is adjacent to the wall and is to be connected to
the gas pipe connection of the boiler with an elbow, enough space
for taking out the condensate trap must be left. This can be done in
two ways:
1
Elbow must be placed crosswise so it will not block the
condensate trap when it is being taken out.
2
Elbow must be placed 120 mm below the gas piping connection
of the boiler.
4.8.3
Guidelines when connecting the water
piping
When connecting the piping to the boiler, observe the following
instructions:
WARNING
Ignoring the rules explained below may result in serious
damages in installation or boiler or cause discomfort of the
user. The manufacturer is not responsible for any damage
that may occur this way.
▪ The installation of the boiler should be in compliance with the
applicable legislation, standards, and regulations.
Summary of Contents for D2CND024A4AB
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