4
Set-up and installation
Installation and operating instructions
19
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_02 – 04/2018 – EN
Item
Designation
Item
Designation
*
If needed
WH
Wall bracket
PA
Test adapter
WHV
Extension for wall bracket
RR
Inspection pipe
WKV
Extension for external wall bracket
SD
Slanting roof cover
ZR
Supply air pipe (mounting height for supply air inlet ≥ 1 m
above the ground)
FD
Flat roof covering
WA
Wall distance
MSD
Silencer
Tab. 4-9
Legend for flue gas system construction sets
Additional kits
▪ Flue gas connection to a shaft system (rigid flue gas line
SET E
or
flexible flue gas line
SET-O
)
▪ Flue gas connection for external wall line (
SET-G
)
If necessary, additionally needed concentric LAS pipes for increased
roof or ceiling heights, single wall PP pipes for flue heights of more
than 10 m or additional accessory components must be ordered.
The
three-digit numbers
in assist in finding
individual compon-
ents
in the
price list
.
4.6
Water connection
The connections of the A2 F are on the top of the device. Optionally,
a valve kit or a Smart Start kit can be installed in the boiler to con-
nect a hot water tank.
Important information
CAUTION
If the A2 F is connected to a heating system with
steel
pipes
,
radiators
or non-diffusion-proof floor heating pipes,
slurry and swarf could enter the boiler body and cause
blockages
, local
overheating
or corrosion.
▪ Rinse supply lines before filling the device.
▪ Rinse out the heat distribution network (in the existing
heating system).
▪ Install a dirt filter or sludge separator in the heating re-
turn flow (see
Chap. 1.2.6
).
CAUTION
Corrosion may be caused by air entering the heating water
network and by a quality of the heating water that does not
comply with the requirements in accordance with
Chap.
1.2.5
. Corrosion products (particles) thus created may clog
pumps and valves and cause malfunctions.
▪ Device may not be connected by permeable, flexible
lines.
INFORMATION
In accordance with EN 12828 a safety valve that limits the
maximum permissible operating pressure in the heating
system must be installed on or in the immediate vicinity of
the heat generator. There may not be any hydraulic block-
ing elements between the heat generator and the safety
valve.
Any steam or heating water which may escape must be
drained by a suitable blow-off line with constant gradient in
a frost-protected, safe and observable manner.
A suitable safety valve is integrated in the A2 F as stand-
ard (see
Fig. 3-4
, item 29). The blow-off line, which is led
out of the boiler as a transparent hose, must be extended
by the customer and connected to the waste water system.
A suitably-sized diaphragm expansion vessel (available as
an accessory) preset for the heating system must be con-
nected to the A2 F. There may not be any hydraulic block-
ing elements between the heat generator and the dia-
phragm expansion vessel.
If the diaphragm expansion vessel is to be connected out-
side A2 F, the internal connection (
Fig. 3-3
and
Fig. 3-4
,
item 25) must be sealed on site.
4.6.1
Connecting hydraulic lines
1
Establish hydraulic connections on the A2 F.
▪
Observe the specified tightening torque.
▪ Connect the water for filling or refilling the heating system as
specified by EN 1717/EN 61770 to avoid contamination of
drinking water by return flow.
INFORMATION
The A2 F is equipped with a pressure sensor. The system
pressure in monitored electronically and can be displayed
with the device switched on.
Nevertheless, we recommend installing a mechanical pres-
sure gauge between the A2 F and the diaphragm expan-
sion vessel, for example.
▪ Install the pressure gauge so that it is easy to see when
filling.
1
Connect the blow-off line and diaphragm expansion vessel ac-
cording to EN 12828.
▪ Any steam or heating water which may escape must be drained
by a suitable blow-off line with constant gradient in a frost-pro-
tected, safe and observable manner.
▪ Connect a suitably dimensioned and preset diaphragm expan-
sion vessel for the heating system. There may not be any hy-
draulic blocking elements between the heat generator and the
safety valve.
▪ Position the diaphragm expansion vessel in an easily access-
ible place (maintenance, parts replacement).
▪ Lay the ducting in such a way that the housing parts of the A2 F
can be inserted easily after installation.
