Daikin D9HA2018A, D9HA2024A, D9HA2032A, R9HA2018A, R9HA2024A Operation manuals

Installation and

operating

instructions

Oil condensing boiler A2 F

A2 F 18H
A2 F 24H
A2 F 32H

04/2018

Daikin ROTEX

D9HA2018A
D9HA2024A
D9HA2032A

R9HA2018A
R9HA2024A
R9HA2032A

Installation and operating instructions

Oil condensing boiler A2 F

English

List of contents

List of contents

1 General safety precautions 4

1.1 Particular safety instructions ..................................................... 4

1.1.1 Observing the instructions .......................................... 5

1.1.2 Meaning of warnings and symbols.............................. 5

1.2 Safety instructions for installation and operation....................... 5

1.2.1 General ....................................................................... 5

1.2.2 Intended use ............................................................... 5

1.2.3 Device installation room.............................................. 6

1.2.4 Electrical installation ................................................... 6

1.2.5 Requirements for the heating water............................ 6

1.2.6 Heating system and sanitary connection .................... 6

1.2.7 Fuel............................................................................. 6

1.2.8 Operation .................................................................... 6

2 Handover to operator and warranty 7

2.1 Instruct the owner...................................................................... 7

2.2 Warranty conditions................................................................... 7

3 Product description 8

3.1 Design and components............................................................ 8

3.2 Brief description......................................................................... 10

4 Set-up and installation 11

4.1 Dimensions and connection dimensions ................................... 11

4.2 Different set-ups ........................................................................ 11

4.2.1 Room-air independent operation ................................ 12

4.2.2 Partial ambient air-independent mode........................ 12

4.2.3 Ambient air-dependent mode...................................... 13

4.2.4 Additional information on device type in accordance

with CEN/TR1749 ...................................................... 13

4.3 Transport and delivery............................................................... 14

4.4 Installing the oil condensing boiler ............................................ 15

4.4.1 Selecting the installation site....................................... 15

4.4.2 Installing the device .................................................... 16

4.5 Air/flue gas system (LAS).......................................................... 16

4.5.1 General instructions for the flue gas system............... 16

4.5.2 Connecting a flue gas line........................................... 17

4.5.3 Flue gas system kits ................................................... 18

4.6 Water connection ...................................................................... 19

4.6.1 Connecting hydraulic lines.......................................... 19

4.6.2 Connect the condensate drain.................................... 20

4.7 Electrical connection ................................................................. 20

4.7.1 Opening the boiler control panel and establishing

electrical connections.................................................. 20

4.7.2 Integrated heating circulation pump and 3-way valve. 22

4.7.3 Temperature sensors and further electric

components ................................................................ 22

4.7.4 Connecting the RoCon OT1 external temperature

sensor ......................................................................... 23

4.7.5 RoCon M1 mixer module (optional) ............................ 24

4.7.6 Room controller RoCon U1 (optional)......................... 24

4.7.7 Internet Gateway RoCon G1 (optional)....................... 24

4.7.8 Room thermostat (optional) ........................................ 24

4.7.9 External switching contact (optional) .......................... 24

4.8 Connect the oil line.................................................................... 25

4.8.1 Important instructions for oil connection ..................... 25

4.8.2 Connecting the oil filter ............................................... 25

4.8.3 Connect the oil line ..................................................... 26

4.9 Filling the system....................................................................... 26

4.9.1 Checking the water quality and adjusting the

pressure gauge ........................................................... 26

4.9.2 Filling the heating system ........................................... 26

4.10 Installing/Removing the boiler cladding ..................................... 26

5 Start-up 29

5.1 Initial commissioning ................................................................. 29

5.1.1 Requirements.............................................................. 29

5.1.2 Checks before start-up................................................. 29

5.1.3 Start-up ........................................................................ 29

5.1.4 After start-up ................................................................ 29

5.2 Checklists for start-up................................................................. 30

6 Controller and electronic components 31

6.1 Operating elements on the boiler control panel.......................... 31

6.2 Replacing the RoCon B1 control panel ...................................... 31

6.3 Change cables ........................................................................... 32

6.4 Changing sensors ...................................................................... 32

6.4.1 Replacing the inflow temperature sensor / return flow

temperature sensor and pressure sensor .................... 33

6.4.2 Changing the flue gas temperature sensor.................. 33

6.5 Replacing the fuse or circuit board............................................. 33

7 Oil burner 35

7.1 Design and brief description....................................................... 35

7.2 Safety function............................................................................ 36

7.3 Burner setting ............................................................................. 36

7.3.1 Setting values .............................................................. 36

7.3.2 Establishing access to the burner................................ 37

7.3.3 Checking and setting the burner.................................. 37

7.3.4 Check the vacuum at the oil pump............................... 37

7.3.5 Adjusting the flue gas quality ....................................... 37

7.3.6 Recirculation gap ......................................................... 38

7.3.7 Check and set the electrode distance and the

distance between oil nozzles and air nozzles .............. 38

7.4 Dismantling the burner ............................................................... 39

7.4.1 Move the burner to the service position....................... 39

7.4.2 Installing/removing the recirculation pipe..................... 40

7.4.3 Removing/fitting the burner.......................................... 40

7.5 Connecting the firing unit............................................................ 41

7.6 Ignition transformer with flame monitor ...................................... 41

7.7 Oil burner pump and oil filter ...................................................... 42

8 Hydraulic connection 43

8.1 Hydraulic system connection...................................................... 43

9 Service and maintenance 45

9.1 General overview of service and maintenance .......................... 45

9.2 Service and maintenance tasks ................................................. 45

9.2.1 Filling, topping up the heating system.......................... 45

9.2.2 Checking the connections and pipes ........................... 46

9.2.3 Cleaning the combustion chamber and condensate

siphon/condensate box ................................................ 46

9.2.4 Checking and cleaning the burner ............................... 48

9.2.5 Changing the ignition electrodes and oil nozzle........... 49

10 Faults and malfunctions 50

10.1 Troubleshooting.......................................................................... 50

10.2 Overview of possible malfunctions ............................................. 50

10.3 Fault codes ................................................................................. 52

10.4 Rectifying burner malfunctions and STB malfunctions ............... 53

10.5 Emergency operation ................................................................. 53

11 Taking out of operation 54

11.1 Temporary shutdown.................................................................. 54

11.2 Final decommissioning and disposal.......................................... 54

12 Technical data 55

12.1 Basic data................................................................................... 55

12.1.1 Integrated heating circulation pump, 3-way valves ...... 56

12.1.2 Information on the type plate ....................................... 57

12.1.3 Data sheets according to Ecolabel and Ecodesign

regulation (EU) 811/2013............................................. 57

12.1.4 Tightening torque ......................................................... 58

12.2 Flow rate and residual feed height ............................................. 59

12.3 Temperature sensor ................................................................... 59

12.4 Electrical connection diagram .................................................... 60

13 Notes 62

List of keywords 63

Installation and operating instructions

2

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

14 For the chimney sweep 64

14.1 Data for designing the flue gas pipe .......................................... 64

14.2 Emissions measurement ........................................................... 64

List of contents

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

3

1 General safety precautions

1 General safety precautions

1.1 Particular safety instructions

WARNING

Heating devices that have not been set
up and installed correctly can impair
the function of the heating device and/
or cause serious or fatal injuries to the
user.

▪ Work on the device (such as set-up,

servicing, connection and initial start­up) must only be carried out by per­sons who are authorised who are
authorised and who have success­fully completed qualifying technical
or vocational training and who
have taken part in advanced training
sessions recognised by the relevant
responsible authorities for the spe­cific activity. These include, in partic­ular, certified heating engineers,

qualified electricians and HVAC
specialists, who, because of their
professional training and their ex­pert knowledge, have experience in

the professional installation and
maintenance of heating systems,
gas installations and hot water tanks.

WARNING

Disregarding the following safety in­structions may result in serious phys­ical injury or death.

▪ This device must only be used by

children aged 8 and above and by
persons with restricted physical,
sensory or mental capabilities or with
a lack of experience and knowledge,
if they are under supervision or if
they have been instructed in the safe
use of the equipment and under­stand the dangers arising therefrom.
Children must not play with the
device. Cleaning and user mainten-

ance must not be carried out by
children without supervision.

▪ Make up the power supply in accord-

ance with IEC 60335-1, via a separ­ator device which exhibits contact
separation in all poles with a contact
opening distance that provide full
disconnection in accordance with
overvoltage category III.

▪ All the electrical work must only be

carried out by electrically qualified
experts and with consideration of the
local and national regulations, and
the instructions in this manual.
Check that a suitable electrical cir­cuit is being used.
Inadequate capacity of the power cir­cuit or improperly executed connec­tions can cause electrocution or fire.

▪ The customer must install a pressure

relief device with rated over-pressure
less than 0.6MPa (6bar) for con­necting a hot water storage tank.
The connected drain line must have
a continuous gradient and a free out­let in a frost-free environment
(seeChap. 4.4).

▪ Water may drip out of the drain line

of the pressure relief device. The
drain opening must be left free to at­mosphere.

▪ The pressure relief device must be

operated regularly in order to re­move scale deposits and to make
sure it is not blocked.

▪ All work on oil-carrying parts must

only be carried out by heating oil-re­lated qualified experts and with con­sideration of local and national regu­lations, and the instructions in this
manual.

▪ Improperly performed work on oil or

flue gas-carrying lines can endanger
life and health and hinder the opera­tion of the heating device.

Installation and operating instructions

4

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

1 General safety precautions

1.1.1 Observing the instructions

▪ The original documentation is written in German. All other lan-

guages are translations.

▪ Please read this manual carefully and thoroughly before proceed-

ing with the installation or modification of the heating system.

▪ The precautionary measures described in this document cover

very important topics. Follow them meticulously.

▪ The installation of the system, and all activities described in this

manual and the applicable documents for the installer must be
carried out by an approved installer.

This manual provides all the necessary information for installation,
start-up and maintenance, as well as basic information on operation
and settings. Please see the attached documents for a detailed de­scription of operation and control.

All heating parameters needed for smooth operation are already
factory-set. Please refer to other relevant documents for information
on setting the control.

Relevant documents

▪ A2 F :

▪ Operating manual for the operator

▪ RoCon BF: Operating instructions.
▪ When additional components are connected; the associated in-

stallation and operating instructions.

The guides are included in the scope of supply for the individual
devices.

1.1.2 Meaning of warnings and symbols

Warnings in this manual are classified according into their severity
and probability of occurrence.

DANGER

Indicates an immediate danger.

Disregarding this warning can lead to serious injury or
death

WARNING

Indicates a potentially dangerous situation

Disregarding this warning may result in serious physical in­jury or death.

CAUTION

Indicates a situation which may cause possible damage

Disregarding this warning can cause damage to property
and the environment, and result in minor injuries.

This symbol identifies user tips and particularly useful in­formation, but not warnings or hazards

Special warning signs

Some types of danger are represented by special symbols:

Electric current

Danger of explosion

Risk of burning or scalding

Risk of poisoning

Validity

Some information in this manual has limited validity. The validity is
highlighted by a symbol.

Observe specified tightening torque (see )

Handling instructions

1 Handling instructions are shown as a list. Actions for which the

sequential order must be maintained are numbered.

è

Results of actions are identified with an arrow.

1.2 Safety instructions for installation and operation

1.2.1 General

WARNING

Heating devices that have not been set up and installed
correctly can impair the function of the heating device and/
or cause serious or fatal injuries to the user.

▪ Work on the A2 F (such as set-up, servicing, connection

and initial start-up) must only be carried out by persons
who are authorised and who have successfully com­pleted qualifying technical or vocational training and
who have taken part in advanced training sessions re­cognised by the relevant responsible authorities for the
specific activity. These include, in particular, certified

heating engineers, qualified electricians and HVAC
specialists, who, because of their professional train­ing and their expert knowledge, have experience in the

professional installation and maintenance of heating sys­tems, gas installations and hot water tanks.

▪ Switch off the main switch and secure it against uninten-

ded switching on when carrying out any work on the A2
F.

▪ Do not leave any tools or other objects inside the device

after finishing installation or maintenance work.

Avoiding danger

A2 F conforms to the state-of-the-art and meets all recognised tech­nical requirements. However, improper use may result in serious
physical injuries or death, as well as property damage. To prevent
such risks, only install and operate the devices:

▪ as stipulated and in perfect condition,

▪ with an awareness of safety and the hazards involved.

This assumes knowledge and use of the contents of this manual, of
the relevant accident prevention regulations as well as the recog­nised safety-related and occupational health rules.

Before working on the heating system

▪ Only authorised and trained heating technicians may work on the

heating system (such as installation, connection and initial start­up).

▪ Switch off the main switch and secure it against unintended

switching on when carrying out any work on the heating system.
▪ Seals must not be damaged or removed.
▪ Make sure that the safety valves comply with the requirements of

EN12828 when connecting on the heating side, and with the re-

quirements of EN12897 when connecting on the domestic water

side.

1.2.2 Intended use

The A2 F may only be used for the heating of hot water heating sys­tems. It must only be installed, connected and operated according to
the information in this manual.

The A2 F may only be operated with the integrated circulation pump
and in conjunction with a controller approved by the manufacturer.

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

5

1 General safety precautions

Any other use outside the intended use is considered as improper
and will result in a loss of warranty. The operator alone shall bear re­sponsibility for any resulting damage.

The A2 F is suitable for operation with light heating oil.

Intended use also includes compliance with the maintenance and
service conditions. Replacement parts must at least satisfy the tech­nical requirements defined by the manufacturer. This is the case,
forexample, with original spare parts.

1.2.3 Device installation room

▪ Operate A2 F only if sufficient combustion air supply is ensured. If

the A2 F is operated as an ambient air-independent device with a
concentric air/flue gas system (LAS) dimensioned according to the
manufacturer's standard, this is automatically ensured and there
are no further conditions for the installation room. Only this
method of operation is permissible for installation in residential
rooms.

▪ Make sure that there is an outside air opening of at least 150cm

for ambient-air dependent or partial ambient-air independent oper­ation.

▪ Do not operate the A2 F in ambient-air dependent operation in

rooms with aggressive vapours (e.g. hair spray, perchloroethyl­ene, carbon tetrachloride), strong dust formation (e.g. workshop)
or high humidity (e.g. laundries).

▪ Avoid operating conditions that can cause heavy soiling of the

burner. Do not operate the device if temporary heavy dust depos­its occur in the area of the air extraction system.

▪ Always ensure the minimum distances to walls and other objects

(see Chap. 4.4.1).

1.2.4 Electrical installation

▪ Electrical installations may only be carried out by electrical techni-

cians and in compliance with valid electrical guidelines as well as
the specifications of the responsible energy supply company.

▪ Compare the mains voltage (230V, 50Hz) indicated on the name-

plate with the supply voltage before connecting to the mains.

▪ Before beginning work on live parts, disconnect them from the

power supply (switch off main switch, remove fuse) and secure
against unintentional restart.

▪ Device covers and service panels must be replaced as soon as

the work is completed.

Using filling water and top-up water which does not meet the stated
quality requirements can cause a considerably reduced service life
of the device. The responsibility for this lies solely with the operator.

1.2.6 Heating system and sanitary connection

▪ Create a heating system according to the safety requirements of

EN12828.

▪ The sanitary connection for filling the system from the drinking wa-

ter supply network and for connection of a hot water tank must
meet the requirements of EN12897. The requirements of the fol­lowing must also be observed:

▪ EN1717 – Protection against pollution of potable water installa-

tions and general requirements of devices to prevent pollution
by backflow

▪ EN61770 – Electric appliances connected to the water mains –

Avoidance of backsiphonage and failure of hose-sets

2

▪ EN806 – Specifications for installations inside buildings con-

veying water for human consumption

▪ and, in addition, the country-specific legislation.

1.2.7 Fuel

The A2 F is intended exclusively for the use of approved heating oils
(see Chap. 12).

1.2.8 Operation

▪ Do not operate the A2 F if the boiler cladding is open.
▪ Only operate the A2 F if all requirements according to the check-

list in Chap. 5.2 are satisfied.

1.2.5 Requirements for the heating water

Avoid damage caused by deposits and corrosion: Comply with the
applicable engineering regulations on prevention of corrosion
products and deposits (VDI 2035, BDH/ZVSHK technical information
"Scale formation").

Measures for desalination, softening or hardness stabilisation are
necessary if the filling and top-up water have a high total hardness
(>3mmol/l - total of the calcium and magnesium concentrations, cal­culated as calcium carbonate).

Minimum requirements regarding the quality of filling and supple­mentary water:

▪ Water hardness (calcium and magnesium, calculated as calcium

carbonate): ≤3mmol/l
▪ Conductivity: ≤1500 (ideal: ≤100) μS/cm
▪ Chloride: ≤250mg/l
▪ Sulphate: ≤250mg/l
▪ pH-values (heating water): 6.5 - 8.5

Measures for desalination, softening or hardness stabilisation or
other suitable conditioning measures are necessary to maintain the
required water quality if the filling and top-up water have a high total
hardness or other properties divergent from the minimum require­ments.

Installation and operating instructions

6

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

2 Handover to operator and

warranty

2.1 Instruct the owner

▪ Before you hand over the heating system, explain to the owner

how he/she can operate and check the heating system.

▪ Hand over the technical documentation (at least the operating in-

structions and operating manual) to the operator and advise him
that these documents must be made available at all times and be
stored in the immediate vicinity of the device.

▪ Document the handover by filling out the installation and instruc-

tion forms together with the owner and sign them.

2.2 Warranty conditions

The legal guarantee conditions fundamentally apply. Our more ex­tensive warranty conditions can be found in the Internet. Ask your
suppliers if necessary.

There is only an entitlement to warranty services when it can be cer­tified that the annual maintenance work according to chap. 9has
been regularly completed.

2 Handover to operator and warranty

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

7

3 Product description

3 Product description

3.1 Design and components

Fig.3-1 Design and components - view from above

Fig.3-2 Design and components - front and rear view

(1)

Fig.3-3 Design and components - view without cladding

(1)

(1)

(1)

For legend, see Tab. 3-1

Installation and operating instructions

8

Fig.3-4 Design and components - view of lower part

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

(1)

3 Product description

Fig.3-5 Design and components with standard equipment -

schematic drawing (hydraulic system)

Fig.3-6 Design and components with valve kit - schematic draw-

ing (hydraulic system)

(1)

(1)

Fig.3-7 Design and components with Smart start kit - schematic

drawing (hydraulic system)

(1)

Item Designation Item Designation

A View from front 21 Heating circulation

pump
B Rear view 22 Condensate siphon
1 Heating flow 23 Supply air connection
2 Heating return flow 24 oil filter
3 Storage tank – char-

25 MAG connection

ging flow (optional)

4 Storage tank – char-

26 Recirculation tube
ging return flow (op­tional)

5 Oil connection 27 KFE cock
6 flue gas connection 28 Flue gas temperature

sensor

7 Mains switch 29 Safety-pressure relief

valve (heating circuit)

8 Controller – control

30 Automatic vent valve
panel

9 boiler enclosure 32 Valve kit
10 Height-adjustable feet 33 Smart start kit
11 Recessed grips 3UV1 /3

UV DHW

3-way valve (distribu­tion valve, hot water/
heating)

12 Optional flue gas con-

3UVB1 3-way mixer valve
nection

13 Condensate drain FLS FlowSensor
14 Feed-through for ex-

ternal diaphragm ex­pansion vessel

MAG Diaphragm expansion

vessel (accessory/
provided by the cus­tomer)

(1)

For legend, see Tab. 3-1

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

9

3 Product description

Item Designation Item Designation

15 Blow-off line from

safety valve

16 Cable penetration STBK Safety temperature

17 Burner tv1 Inflow temperature

18 Boiler control panel t
19 Boiler main body with

heat and sound insula­tion

20 Type plate with manu-

facturer's number

Tab.3-1 Legend for Fig. 3-1 to Fig. 3-7

DS Pressure sensor

limiter

sensor

v2

t

R

Internal mixer sensor
Return flow temperat-

ure sensor

3.2 Brief description

The A2 F is a completely pre-assembled oil condensing unit.

Operating mode

The A2 F is constructed so it can be operated independent of the
ambient air (concentric flue gas/air supply pipes). All flue gas carry­ing parts are surrounded by combustion air. The burner suctions the
combustion air directly in through an installation shaft or a double­walled flue gas pipe. This operating mode is recommended by us
and has many advantages:

▪ The heating room does not need any ventilation opening into the

open air and therefore does not cool down.
▪ Lower energy consumption.
▪ Additional energy recovery in the flue gas pipe through preheating

the combustion air.
▪ Contamination from the environment of the burner are not suc-

tioned in. The heating room can thus be used as a workspace,

laundry room, etc. at the same time.
▪ Possible to install in loft areas or attic.
▪ Possible to install in garages.

The heating water is first fed into the boiler body at the lowest posi­tion. There, it is heated in counterflow via the adjacent combustion
chamber and several stainless steel heat exchanger tubes that pass
through the boiler body. The heated heating water is fed from the up­per connection of the boiler body to the inflow connection of the
boiler housing. The combustion gases flow through the heat ex­changer tubes into the boiler body from top to bottom after flame re­versal in the combustion chamber. These tubes contain turbulators
that improve heat transfer to the heating water.

The condensate produced is fed into the sewage system via the con­densate siphon and then via a plastic pipe. Optionally, it can be
neutralised via the optional condensate box.

Smart Start function

The Smart Start function was developed to avoid frequent switching
of the burner when the requirement for room heating is low.

If the optional Smart Start kit (two steplessly controllable 3-way
valves) is installed in the A2 F, the Smart Start function can be used.
The requirement for room heating is therefore temporarily covered
by the heat stored in the hot water storage tank. The Smart Start
function remains active until the next request for hot water genera­tion is pending.

The Smart Start function is automatically controlled by the RoCon
BF controller.

Safety management

The entire safety management of the A2 F is carried out by the elec­tronic controller. If there is water shortage, oil shortage or undefined
operating conditions, there is a safety shutdown. A corresponding
fault signal provides an engineer with all the necessary information
for troubleshooting.

Electronic controller

An electronic digital controller combined with the burner "intelligent"
firing unit automatically controls all heating and hot water functions
for the direct heating circuit and an optional storage tank charging
circuit.

One or more mixed circuits can be connected and controlled via op­tionally connected mixer modules RoCon M1.

All settings, displays and functions are carried out by the integrated
RoCon BF controller. The display and the operating elements make
operation easy.

A digital room controller (RoCon U1) is optionally available for
greater comfort. It can be used as a remote control and room ther­mostat.

The controller can be connected to the Internet via the optional gate­way (RoCon G1). This enables remote control of the A2 F by mobile
phones (by app).

Condensing technology

Condensing technology makes optimum use of the energy contained
in the heating oil. The flue gas is cooled down in the boiler – and in
the flue system with ambient air-independent operation in the con­centric flue gas system – to the extent that the temperature is below
the dew point. A part of the water vapour generated through com­bustion of the heating oil thus condenses. The condensation heat is
fed to the heating, as opposed to low-temperature boilers, which en­ables efficiency rates of over 100% (based on the lower heating
value).

Fuel

The A2 F can be operated with standard or low-sulphur heating oil
(sulphur content <50ppm). It is equipped for the combustion of heat­ing oil with biogenic components. Mixing of bio-heating oil up to
10% (B10) is permitted without further conversion.

INFORMATION

We recommend using EL low sulphur heating oil, in order
to achieve the highest efficiency and to keep the mainten­ance expenditure low.

Condensate treatment unit

The condensate produced during combustion in an oil condensing
boiler has a pH-value of 1.8 – 3.7 when using heating oil that is not
low in sulphur.

The optional condensate preparation unit fulfils the following func­tions:

▪ Removal of floating particles in the settling basin
▪ Neutralisation of the condensate in the Hydrolit-MG filter material

When using low-sulphur heating oil, the condensate can usually be
drained off into the sewage network without neutralisation. Please
refer to the regulations of the local water authorities.

Installation and operating instructions

10

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

4 Set-up and installation

A

736

A

606

271

262

1360

134

263 140

140

80

0

0

110

293
368
442
516

540

50

124

R

H

≥ 40 cm

≥ 40

cm

≥ 40 cm

≥ 200 cm

CA

FG

RV

(e)

(e)

(d)

(d)

(f)

(a)

1

(a)

4

(a)

3

(b)

5

(c)

6

(a)

2

C

93

C

53

C

53

C

83

C

33

C

33

B

23

B

23P

B

33

B

53

B

53P

4 Set-up and installation

WARNING

Devices which have been set-up and installed incorrectly
may not operate properly and can be a health and safety
risk endangering human life.

▪ Only authorised and trained heating technicians may set

up and install the A2 F.

4.1 Dimensions and connection dimensions

4.2 Different set-ups

Fig.4-1 Installation dimensions

Item Designation

R

H

Tab.4-1 Legend for Fig. 4-1

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Minimum room height (see Chap. 4.4.1)

INFORMATION

To avoid increased cooling losses, we recommend the in­stallation of SKB gravity brakes (accessory) or the sy­phoning of the connection line.

Fig.4-2 Different set-ups

Item Designation

1-6 Installation versions (for a description, see Chap. 4.2.1

to Chap. 4.2.3)
CA Supply air (combustion air)
FG Flue gas
RV Rear ventilation
a Installation version for ambient air-independent opera-

tion (flue gas/supply air concentric)
b Installation version for conditional ambient air-independ-

ent operation (flue gas/supply air separate)
c Installation version for ambient air-dependent mode
d Longitudinally ventilated shaft with a fire-resistance

period of 90minutes (30minutes in low height residen-

tial buildings). Observe country-specific regulations for

fire-resistance periods!
e Ventilation opening (1x150cm2 or 2x75cm²)
f Rear ventilation opening (150cm2)

Tab.4-2 Legend for Fig. 4-2

The A2 F is designed for ambient air-independent operation. It is
fitted as standard with a concentric flue gas /air supply pipe DN
80/125.

INFORMATION

In some cases, the resonance in the flue gas system can
amplify the noise at the mouth of the flue gas duct. The
noise level can be effectively reduced by using a silencer
(accessory: DN80: E8MSD or DN110: E11MSD).

Installation and operating instructions

11

4 Set-up and installation

INFORMATION

Use of the A2 F in ambient air-independent operation with
a concentric flue gas/air supply line is recommended by us.
If possible, choose this installation version!

In partial ambient air-independent operation (separate flue
gas/air supply lines with a single-walled connecting pipe)
and ambient air-dependent operation the installation room
must have a ventilation opening of at least 150cm2 to the
outside.

As such, the installation room will not be assigned the
heated building envelope under the Energy Conservation
Ordinance (EnEV), which downgrades the energy rating of
the building. This reduces the overall energy efficiency of
the building according to European Directive 2010/31/EU:
EPBD.

The following descriptions of the different set-ups includes
information regarding the possible classification of the
devices based on the type of flue gas routing (equipment
type) in accordance with EN15035 and CEN/TR1749.

Chap. 4.2.4 and Chap. 4.5 must also be observed in this

regard.

The described SETs are accompanied by separate as­sembly instructions.

The SETs mentioned below are recommendations for the
appropriate combination of the required individual compon­ents for the typical installation variants.

4.2.1 Room-air independent operation

INFORMATION

When devices are installed in residential rooms only one of
the installation versions 1 to 4 is permissible.

Installation version 1

The A2 F is connected to the chimney or an installation shaft with
the concentric SetK LAS connection line.

▪ The combustible air supply from the outside runs through the

chimney or through an installation shaft.

▪ The flue gas discharge to the outside runs through the same shaft

as the air supply.

▪ Minimum vertical distance between flue gas exit and roof ridge:

40cm.

▪ Device type C

Installation version 2

The A2 F is placed directly below the roof. Connection with SETL.

▪ The combustible air supply and flue gas discharge run through a

concentric dual pipe.

▪ The combustible air supply from the outside runs through the

outer ring-shaped gap of the dual pipe, and the flue gas discharge
to the outside runs through the inner tube.

▪ Minimum vertical distance between flue gas exit and roof surface:

40cm.
▪ Minimum height of the flue gas pipe: 2m.
▪ Device type C

Installation version 3

The A2 F is not placed directly below the roof. The dual pipe for the
combustible air supply and flue gas duct runs through the roof truss.

▪ The combustible air supply and the flue gas discharge run through

a concentric dual pipe (as in Installation version 2).
▪ In the area of the roof truss, the dual pipe for the combustible air

supply and the flue gas duct must be laid through a protective pipe

with sufficient fire resistance or be structurally separated from the

roof truss.

93x

33x

▪ Device type C

33x

Installation version 4

The A2 F is connected with the SETK LAS connection line to the
SETG outer wall system.

▪ The combustible air supply from the outside runs through the ring-

shaped gap in the dual pipe, through the outer wall (suction from
below).

▪ The flue gas discharge to the outside runs through a concentric

pipe, through the outer wall and then up to at least 40cm over the
roof surface. In the external area, the outer air gap serves as heat
insulation for the flue gas pipe.

▪ Device type C

53x

If the wall feed through is at a height of less than one
meter above the ground, we recommend routing the com­bustion air through a separate air supply pipe (mounting
height: approx. 2m). W8ZR or W11ZR

Installation version 5

If, for constructional or legal/regulatory reasons, the shaft used for
the flue gas routing is not suited for also routing the combustion air
at the same time, the combustion air must be routed through a sep­arate line.

If the flue gas connection line to the shaft is double-walled and is
surrounded by the combustion air, there are no additional ventilation
requirements on the installation room.

▪ Combustion air supply is routed from the outside via the ad-

equately sealed supply line which is connected directly to the con­centric exterior pipe of the connection line. The supply line should
be sized so that the suction resistance at nominal output is
less than 50Pa.

▪ The connection line between the A2 F and the installation shaft is

completely concentric and surrounded by combustion air.

▪ Device type C

, C

53x

83x

INFORMATION

The A2 F is suitable for installation and operation within
garages. Requirements:

▪ Ambient air-independent operation,

▪ A durable operating manual placed in a very visible

place near the device,

▪ The construction must include a protective device

against mechanical damage (vehicle!) for the entire sys­tem (e.g. bracket or deflector).

▪ Permanently frost-protected.

Installation variant 7 (not shown)

If permitted by local regulations, the A2 F can be connected to
SETW2 to the horizontal flue gas outlet.

▪ The combustible air supply and flue gas discharge run through a

concentric dual pipe.

▪ The combustible air supply runs from the outside through the

outer ring-shaped gap of the dual pipe (supply air inlet via the in­take grille of the wall feed through) and the flue gas discharge to

the outside runs through the inner tube.
▪ Minimum height of the flue gas pipe: 2m
▪ Observe local regulations regarding minimum distances of win-

dows or other building openings.
▪ Device type C

13x

4.2.2 Partial ambient air-independent mode

Alternative to installation variant 5

The A2 F is operated with separately routed supply air/flue gas lines
(2-pipe system).

Installation and operating instructions

12

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

4 Set-up and installation

▪ The combustion air supply from the outside runs through an ad-

equately sealed air supply line through the external wall. The sup­ply line should be sized so that the suction resistance at nominal
output is less than 50Pa.

▪ Flue gas discharge to the outside runs through the chimney or an

installation shaft. If the connection line between the A2 F and the
installation shaft is single-walled or not completely surrounded by
combustion air, a ventilation opening to the outside of at least

150cm2 is required.

Appropriate measures must be taken to ensure that the burner
cannot be operated if the ventilation opening is closed.

▪ The installation shaft where the flue gas line runs must be rear

ventilated. There must be a rear ventilation opening of at least

150cm2 in the lower area.

The cross-section of this installation shaft must be sized so that

between the external wall of the flue gas line and the internal
face of the installation shaft the following minimum distance

must be maintained:

▪ with a rectangular shaft cross-section: 2cm

▪ with a round shaft cross-section: 3cm.
The rear ventilation opening must not be located in rooms where a
negative pressure is generated (e.g. by controlled apartment vent­ilation, a tumble-drier etc.).

▪ Device type C

, C

53x

83x

4.2.3 Ambient air-dependent mode

Installation version 6

The A2 F can also be connected dependent on the ambient air.
Thereby, only the inner flue gas pipe (plastic pipe Ø 80mm) of the
concentric air-flue gas pipe is connected to the flue gas line. The
device sucks the combustible air from the installation room through
the ring-shaped gap of the jacket pipe.

The same conditions apply to the flue gas routing into the open air,
shaft dimensioning and rear ventilation as in Chap. 4.2.2. A ventila-
tion opening into the open air of at least 150cm2 is mandatory.

▪ Device type B23, B

, B33, B53, B

23P

53P

INFORMATION

In some cases, the resonance in the flue gas system can
amplify the noise at the mouth of the flue gas duct. The
noise level can be effectively reduced by using a silencer
(DN80: E8MSD or DN110: E11MSD).

4.2.4 Additional information on device type in
accordance with CEN/TR1749

INFORMATION

We basically recommend installing the A2 F regardless of
the room air (device type C) and with concentric air/flue
gas guides (see Chap. 4.2.1). Other permissible applica­tions of the air intake and flue gas discharge are not de­scribed in detail in these instructions.

Special requirements that exist for such systems based on
EN15035 are listed below.

C13:

▪ Horizontal openings for flue gas outlet and supply air inlet
▪ Openings within a square of 50cmx50cm

C33:

▪ vertical openings for flue gas outlet and supply air inlet
▪ Openings within a square of 50cmx50cm
▪ Spacing of opening levels <50cm

C43:

▪ Connection of more than one device to a common air/flue gas sys-

tem that is part of the building
▪ vertical opening for flue gas outlet and supply air inlet
▪ Openings within a square of 50cmx50cm
▪ Spacing of opening levels <50cm
▪ Suitable calculated dimensioning verification required because va-

cuum prevails in the case of the flue gas inlet into the common air/

flue gas system. The flue gas must be discharged with a natural

draught.
▪ For data on dimensioning, see Chap. 14.1.
▪ Condensate flow from the common air/flue gas system must not

be discharged through the device.

C53:

▪ Vertical opening for flue gas outlet
▪ Opening for supply air inlet into different pressure area possible.
▪ Openings must not be installed on opposite walls of the building.

C63:

▪ Connection to a separately approved and marketed flue gas/sup-

ply air system if allowed by national law.
▪ This allows all other described installation forms to the realised for

device type C if the conditions of the respective installation form

are met.
▪ If the dimensions of the system used differ from those described in

this manual (seeChap. 4.5.1), a suitable arithmetical dimension-

ing verification is required.
▪ For data on dimensioning, see Chap. 14.1.
▪ Properties and possible applications of the pipe system:

▪ Minimum requirements according toChap. 4.5.1 fulfilled

▪ Condensate flow into the device allowed with single assign-

ment, not allowed with multiple assignment.

▪ Maximum combustion air temperature: 60°C

▪ Maximum allowed flue gas recirculation current under wind con-

ditions: 10%

C83:

▪ Connection to one or more devices to a vacuum flue gas system

that is part of the building.
▪ Vertical opening for flue gas outlet
▪ Air intake via associated second

(2)

line.
▪ Opening for supply air inlet into different pressure area possible.
▪ Suitable arithmetical dimensioning verification required because

vacuum prevails in the case of the flue gas inlet into the common

air/flue gas system.
▪ For data on dimensioning, see Chap. 14.1.
▪ Properties and application options of the flue gas system:

▪ Minimum requirements according toChap. 4.5.1 fulfilled (except

for pressure class).

▪ Condensate flow into the device allowed with single assign-

ment, not allowed with multiple assignment.

C93:

▪ as for C33, but
▪ Connection of the supply air pipe to an existing vertical shaft (e.g.

chimney) that is part of the building.

(2)

If the air supply pipe was used beforehand as a flue gas pipe or chimney of an oil or solid fuel furnace, it should be cleaned
prior to use as an air supply pipe.

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

13

4 Set-up and installation

▪ The cross-section of this installation shaft must be sized so that

between the external wall of the flue gas line and the internal
face of the installation shaft the following minimum distance

must be maintained:

▪ with a rectangular shaft cross-section: 2cm

▪ with a round shaft cross-section: 3cm

B23:

▪ Flue gas pipe without flow safeguard - vacuum operation
▪ Properties and application options of the flue gas pipe:
▪ Minimum requirements according toChap. 4.5.1 fulfilled.
▪ Opening for flue gas outlet to the outside
▪ Supply air directly from installation room (seeChap. 4.2.3).
▪ If the dimensions of the flue gas line differ from those described in

this manual, a suitable arithmetical dimensioning verification is re­quired.

▪ For data on dimensioning, see Chap. 14.1.

B

:

23P

▪ as for B23, but underpressure operation

B33:

▪ Connection of more than one device to a common flue gas system

(vacuum flue gas shaft).
▪ Vertical opening for flue gas outlet.
▪ Supply air directly from installation room (seeChap. 4.2.3).
▪ Suitable arithmetical dimensioning verification required because

vacuum prevails in the case of the flue gas inlet into the common

air/flue gas system.
▪ For data on dimensioning, see Chap. 14.1.
▪ Parts under overpressure of the connection pipe must be conduc-

ted as a concentric pipe system.

B53:

▪ as for B33, but connection to associated flue gas pipe including flue

gas opening.

B

:

53P

▪ as for B53, but overpressure operation.

Spacings of brackets and offsets

The distance of the supports of the flue gas line must not be more
than 2m in the vertical area.

In the horizontal area of the connecting lines, the brackets must be
installed so tightly that there is no risk of any gradient in the hori­zontal area in which condensate could accumulate.

If an offset is required in the vertical part of the flue gas line, the
maximum angle must not exceed 45°. In the case of external install­ation, the height above the last bracket must not exceed 1.5m.

4.3 Transport and delivery

WARNING

Lifting or displacing the A2 F by the panels can damage
the device.

▪ Only carry the A2 F with the cover removed, in pairs us-

ing the recessed grips provided for this purpose in the
rear panel of the device and on the boiler frame.

The A2 F is delivered on a pallet. All industrial trucks, such as lifting
trucks and forklift trucks, are suitable for transporting it.

Scope of delivery

▪ A2 F (preassembled),
▪ Boiler cladding (see Fig. 4-3)
▪ Screws for boiler cladding
▪ Documentation package

▪ Cable tie
▪ oil filter
▪ External temperature sensor

Fig.4-3 Scope of delivery standard accessories package

Item Designation

A Boiler cladding – side panel
B Boiler cladding – side panel
C Boiler cladding – cover
D Boiler cladding – front panel
E Small accessories: Screws, 4-pin circuit board con-

nector, strain relief clip (3x)
F Cable tie
G External temperature sensor
H oil filter
I Documentation

Tab.4-3 Legend for Fig. 4-3

For A2 F accessories, see price list.

Installation and operating instructions

14

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

4 Set-up and installation

4.4 Installing the oil condensing boiler

4.4.1 Selecting the installation site

The installation site of the A2 F must meet the minimum require­ments below (see alsoChap. 1.2.3).

Installation height

▪ The bottom edge of the condensate connection on the device

must be higher than the drain height of the condensate drain
hose, otherwise condensation can accumulate in the drain. Install
a pedestal if necessary.

▪ Small unevennesses of the installation surface can be com-

pensated using the height-adjustable feet (see Chap. 4.4.2).

Installation area
▪ The base must be level and smooth and have a sufficient ground

load-bearing capacity of 500kg/m² plus safety factor. Install a

pedestal if necessary.

▪ Observe the installation dimensions (see Chap. 4.1).

Installation room

▪ There are no special conditions for ventilation of the installation

room for ambient air-independent operations (using a concentric
air/flue gas system).

▪ In partial ambient air-independent and ambient-dependent mode,

the installation room must have a ventilation opening of at least

150cm2 to the outside. If the flue gas line is routed to the outside

through an installation shaft, it must be rear-ventilated (seeChap.

4.2.2).

▪ For partial ambient air-independent and for ambient air-dependent

mode, the installation room must be free from aggressive vapours
(e.g. hair spray, perchloroethylene, carbon tetrachloride), heavy

dust formation and high atmospheric humidity (e.g. laundry).
▪ Outdoor installation is not permissible.
▪ Installation in an explosion-risk environment is not permissible.
▪ The electronic controller may never be exposed to the effects of

the weather.
▪ The A2 F must be protected from frost.

INFORMATION: HEATING OIL STORAGE IN THE IN­STALLATION ROOM

The construction specifications allow, as a rule, hot oil stor­age of up to 5000litres (according to the firing ordinance of
the country) if the building is a Building Class 1 construc­tion and the installation room is not a room were people
live or work.

Installation in the attic

If the A2 F is installed in the attic and the oil is stored in the rooms
below it, the oil pump of the burner is generally not sufficient. If the
vacuum on the suction side exceeds the value 0.4bar, the oil must
be supplied to the burner through a separate pump. We strongly re­commend using a suction unit.

The minimum height of the flue gas conduit must be 2m in order
to avoid malfunction at start or during operation of the burner.

WARNING

If using a pressure aggregate, oil could escape if there is a
failure. Escaping oil can cause serious damage to the en­vironment.

▪ Install the boiler on a water-proof tray and secure by a

float switch (connection via additional plug strip).

▪ Use only a metallic filter cup (never Plexiglas).

▪ Ambient air-independent operation,
▪ A durable operating manual placed in a very visible place near the

device,

▪ The construction must include a protective device against mech-

anical damage (vehicle!) for the entire system (e.g. bracket or de­flector).

▪ Permanently frost-protected.

Surface temperatures, minimum distance

Fig.4-4 Minimum distances for installation

Item Designation

R

H

a Minimum lateral wall distance: 0.50m

Tab.4-4 Minimum distance dimensions

▪ In ambient air-independent mode with rated power, the design

does not allow temperatures >70°C on any component outside
the device panels. Therefore, no minimum distance is specified for
components made with flammable materials.

▪ A minimum distance of 50mm between the flue gas line and flam-

mable components should be maintained in a partial ambient air­independent and ambient air-dependent operation (separate flue
gas/air supply pipes).

▪ Do not store or use easily inflammable and highly combustible

materials in the immediate vicinity of the A2 F (minimum distance
1m).

▪ When installing the device as described in Fig. 4-4, we recom-

mend maintaining the minimum distances from walls and ceilings
in order to perform maintenance and repair work without excess­ive installation effort.

▪ When installing in a niche, the A2 F can be placed on the left side,

directly against the niche wall, if the area in front of the A2 F is
freely accessible.

Minimum room height: 1.80m

Installation in garages

Provided local regulations do not generally prohibit the installation of
boilers in garages, the A2 F is completely suitable for installation and
operation within garages. Requirements:

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

15

4 Set-up and installation

4.4.2 Installing the device

Precondition

▪ The installation site complies with applicable country-specific reg-

ulations and meets the minimum requirements described in Chap.

4.4.1.

Installation

1 Remove the packaging completely (edge protection as well) and

dispose of it in an environment-friendly manner.

2 Installing the A2 F at the installation site. Only lift or move the

device by the recessed grips provided for this purpose.

3 Position the A2 F in such a way that the connection points of the

oil hoses or mounting position of the oil filter, the ducting of the
heating pipes and the flue gas pipe can be operated without re­strictions.

4 Check the horizontal position and correct installation height of

the A2 F. Slight unevennesses can be compensated by four
height-adjustable feet.

Height adjustment

Fig.4-5 Height-adjustable feet

▪ Adjust the height of the A2 F using the screw with an Allen key

SW 5mm or a 17mm open-ended spanner.

4.5 Air/flue gas system (LAS)

4.5.1 General instructions for the flue gas system

DANGER: RISK OF POISONING

There will be a risk of poisoning caused by flue gas es­caping within enclosed rooms that are inadequately ventil­ated.

▪ Install only approved flue gas systems.

▪ Depending on the installation variant, the stipulated

ventilation and rear ventilation must be ensured (see

Chap. 4.2).

Minimum requirements

For the design and measurement of the flue gas system, the re­spectively valid national fire code ordinance or the country-specific
regulations and EN15287 must be observed.

Basically, for the flue gas system, you can use each flue gas pipe
according to EN14471 with EU label, which meets the following min­imum requirements:

▪ Suitable for heating oil.
▪ Suitable for flue gas temperatures of at least 120°C (temperature

class T120 or higher).

▪ Suitable for at least 200Pa overpressure (pressure class P1 or

H1).

▪ Humidity-resistant (condensation resistance class W).

▪ Sufficiently corrosion-resistant (corrosion resistance class 2).

The properties of the flue gas system must be identifiable on the in­stalled system (nameplate in the installation room).

The associated assembly instructions must be observed for installing
the flue gas and supply air holding system components or their
means of attachment.

▪ Each flue gas line must be installed with a suitable test ad-

apter for checking and setting the combustion values. The
LAS construction sets contain one test adapter each (D8PA)

▪ Depending on the local building regulations, inspection compon-

ents must be installed in the required locations.

Type of connections

▪ On the side or at the rear (SETK)
▪ Direct roof feed-through (SETL)
▪ Straight, directly at the rear (SETH), optional connection on the

back of the device

For further details and connection dimensions for the three variants
of the flue gas pipe, see Chap. 4.5.3.

Installation position and piping height

▪ The maximum permitted flue gas counter pressure is 200 Pa. The

pressure loss in the supply line must not exceed 50Pa.

▪ Angle of entry of the flue gas pipe into the chimney or installation

shaft: at least3°.

▪ Avoid horizontal sections in the connection line or keep them as

short as possible.

▪ Slope for horizontal sections of the flue gas line: at least3°.

Counter-slopes are not permissible at any point in the flue gas
line so that condensate can drain off without restriction.

▪ If the more than 3 deflections >45° are needed for the flue gas

line, the maximum height for the flue gas line reduces by at least
1m per deflection (flue gas calculations may be needed).

▪ If the horizontal connecting piece is extended to more than 2m,

the maximum permitted height of the flue gas duct is reduced by
exactly that length.

▪ Flexible flue gas lines may not be used in horizontal connection

sections.

▪ Straight pipe sections must be fastened at intervals of <2m using

suitable wall brackets. Suitable spacers must be used within ver­tical shafts.

Flue gas system resistance

A minimum resistance in the flue gas pipe is required for a safe
burner start and stable setting values.

1 Switch on the burner (see Chap. 14.2).

2 Measure the resistance with a differential pressure gauge on the

flue gas measurement section between the flue gas and supply
air measurement openings (differential pressure for all A2 F at
least 0.2mbar).

è

If the differential pressure is not reached at the maximum speed
of the burner blower, a silencer must be installed (E8MSD)

The Tab. 4-5 shows the maximum permissible height of the flue gas
line to ensure that the A2 F can be operated in the nominal output
range.

Installation and operating instructions

16

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

4 Set-up and installation

Installation ver-

sion

(according to im-

age 9)

(3) (4)

1

(5)

2

(5)

3

(5) (4)

4

(3) (4)

5

(3) (4)

6

Max. permissible height of the flue gas line

DN80

A2 F 18H A2 F 24H A2 F 32H

8 12 18
10 14 20
10 14 20

7 7 10
25 25 25
25 25 25

Tab.4-5 Maximum height for the flue gas line in m

Any restriction on the output range may require a recalculation of the
maximum permitted height for the flue gas duct. The characteristics
for the flue gas calculation can be obtained from Fig. 4-6 and the

Chap. 14.

Connection

INFORMATION

We recommend use of the associated LAS construction
sets (see Chap. 4.5.3). They satisfy all requirements and
are also fitted with special acid-proof seals.

The associated assembly instructions must be observed
for installing the flue gas and supply air holding system
components or their means of attachment.

1 Connect the A2 F to the flue gas system inside the installation

room (Fig. 4-1).

2 Place the nameplate of the flue gas duct in the installation room.

Fig.4-6 Flue gas mass flow in relation to the burner load (all

types)

Item Designation

m

AG

Flue gas mass flow

P Burner loading

Tab.4-6 Legend for Fig. 4-6

The flue gas mass flow of the system depends on the set burner out­put of the A2 F.

4.5.2 Connecting a flue gas line

INFORMATION

The specialised company carrying out the work must come
to an agreement with the district chimney sweep before be­ginning the work. Even in regions where it is not legally
specified, we recommend documenting the participation of
the district chimney sweep on a form.

Requirements

▪ The flue gas system fulfils the requirements described inChap.

4.5.1.

▪ The flue gas system fulfils any required other national or regional

safety requirements.

▪ The A2 F is installed correctly.

Fig.4-7 Connection dimensions - flue gas pipe

Item Designation

A Boiler connection
B Flue gas connection

Tab.4-7 Legend for Fig. 4-7

Connection side Connection Connection dimen-

sion in mm

A Boiler side A1 Flue gas DN 80

Collar
A2 Supply air DN 125

Collar

B Flue gas side B1 Flue gas DN 80 Inner diameter = 80.0

B2 Supply air DN 125 Inner diameter =

Tab.4-8

Connection dimensions for the LAS connection of the A2

Inner diameter = 80.4

+0.8

Inner diameter =

-0.5

127.0

+0.3

+0.3

126.0

F

INFORMATION

In some cases, the resonance in the flue gas system can
amplify the noise at the mouth of the flue gas duct. The
noise level can be effectively reduced by using a silencer
(E8MSD or E11MSD).

(3)

Shaft cross-section of DN80: 135mm x 135mm

(4)

A horizontal connecting cable with a length of 2m and an 87° deflection are taken into account

(5)

Concentric flue gas/supply line DN 80/125

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

17

4 Set-up and installation

130

10080

215

014

009

004

013

003

002

015

016

017

040

(PA)

040

(PA)

039 052031 050

038

052050

α

1335

1835

041

040

(PA)

038

3696

082
(3x)

094
(3x)

081

090

101103

252

W

A

215

088

098





WA

094 W8 WH 40-60 mm
( 155079.0059)
095 W8 WHV14 43-137 mm
( 155079.0087)
096 W8 WHV23 137-231 mm
( 155079.0088)
097 W8 WHV32 231-325 mm
( 155079.0089)
091 W8 WKV15 55 - 147 mm
( 155079.0084)
092 W8 WKV24 147 - 239 mm
( 155079.0085)
093 W8 WKV33 239 - 331 mm
( 155079.0086)





 SET-L + XXX

α XXX
D8 FD15 0-15° 049
( 155079.0082)
D8 SD25S 5-25° 045
( 155079.0014)
D8 SD45S 25-45° 046
( 155079.0037)
D8 SD55S 35-55° 047
( 155079.0012)
D8 FD 0° 048
( 155079.0040)

xxx

SET-H

( 155079.08)

DRFLUEGAKITA

SET-L

( 155079.10)

E8 RR *

( 155079.0107)

E8 MSD *

( 154578)

SET-E

( 155079.05)

SET-L

( 155079.10)

099

E8 RR *

( 155079.0107)

E8 MSD *

( 154578)

SET-E

( 155079.05)

SET-G

( 155079.07)

E8 ZR *

( 155079.0114)

W8 ZR *

( 155079.0066)

SET-K

( 155079.09)

335 350

640

350

255

85

SET-K

SET-H

4.5.3 Flue gas system kits

Fig.4-8 Flue gas system kits

Installation and operating instructions

18

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

4 Set-up and installation

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 con­nect 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 block­ing 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 stand­ard (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 con­nected to the A2 F. There may not be any hydraulic block­ing elements between the heat generator and the dia­phragm expansion vessel.

If the diaphragm expansion vessel is to be connected out­side 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 pres­sure gauge between the A2 F and the diaphragm expan­sion 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-pro­tected, safe and observable manner.

▪ Connect a suitably dimensioned and preset diaphragm expan-

sion vessel for the heating system. There may not be any hy­draulic 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.

Daikin/ROTEX A2 F
Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN

Installation and operating instructions

19

4 Set-up and installation

INFORMATION

There must not be any hydraulic blocking elements
between the heat generator and the diaphragm expansion
vessel that can be operated by the system operator. The
location (Fig. 3-3 and Fig. 3-4, item 25) provided for the
connection of an integrated diaphragm expansion vessel
(accessory) is not closed when delivered. If the diaphragm
expansion vessel is connected outside the heat generator,
this point must be sealed on site.

1 Carefully insulate pipework against heat loss and to avoid con-

densation (insulation thickness at least 20mm).
– Water shortage protection: The pressure and temperature

monitoring of the A2 F switches off the oil condensing boiler
safely in the event of a lack of water and locks it. No addi­tional water shortage protection is needed in the construc­tion.

– Avoid damage caused by deposits and corrosion: Ob-

serve the requirements on the heating water (see Chap.

1.2.5).

4.6.2 Connect the condensate drain

The condensate resulting from the cooling of the combustion gases
in the boiler and in the flue gas system has a pH-value of 1.8 – 3.7. If
necessary, it must be neutralised in accordance with the guidelines
of the German Wastewater Association (DWA A251) before being
discharged into the public sewage system.

INFORMATION

Depending on the stipulations of the community waster wa­ter regulations, the neutralisation can be dispensed with, if
the condensing boiler is operated exclusively with EL
low-sulphur heating oil.

The condensate is conducted via the condensate siphon mounted
on the flue gas elbow under the boiler body and then discharged into
the sewage system.

If the condensate has to be neutralised before discharge into the
sewage system, a condensate box (accessory) can be installed in
the boiler instead of the condensate siphon.

3 The complete outlet must not be lockable and must discharge

the condensation and any medium leaking due to damage (heat­ing water) outwards visibly (e.g. hose to flow drain or transparent
outlet pipe).

4 In order to avoid accumulation in the flue gas connection of the

boiler, make sure that no additional siphon is formed from the
condensate drain line to the connection to the wastewater line.

5 Fill the condensate siphon or condensate box. To do so, pour in

water via the inspection opening of the flue gas pipe.

6 Check the condensate drain section for leakage.

4.7 Electrical connection

DANGER: RISK OF ELECTROCUTION

Touching live parts can result in an electric shock and
lead to potentially fatal injuries and burns.

▪ Before beginning work on live parts, disconnect all of

the systems circuits from the power supply (switch off
external main switch, disconnect fuse) and secure
against unintentional restart.

▪ Establishment of the electrical connection and work on

electrical components should only be performed by elec-
trical technicians in compliance with valid standards
and guidelines as well as the specifications of the en­ergy supply company and the instructions in this manual.

▪ Never make constructional changes to connectors or

other electrical equipment components.

▪ Device covers and service panels must be replaced

as soon as the work is completed.

All A2 F control and safety devices are connected ready for use and
tested. Modifications on the electrical installation are dangerous and
prohibited. The operator alone shall bear responsibility for any result­ing damage.

Mains connection, external temperature sensor and other optional
applications must still be connected to the boiler control panel.

4.7.1 Opening the boiler control panel and establishing electrical connections

1 Check the supply voltage (~230V, 50Hz).

2 Set the mains switch of the A2 F to "Off" (see Fig. 3-2, item 7).

3 Switch off the circuit breaker in the junction box of the domestic

power supply.

4 Remove the front panel of the boiler control panel (Fig. 4-10).

Fig.4-9 Connection of the condensate drain line

The condensate box can be mounted under the boiler frame and
connected to the flue gas connection piece of the boiler. The con­nection to the wastewater network is designed for HT pipe DN 50.

1 Condensation drain line (not included) with free inflow to the

drains connection.

2 Lay the condensate drain sloping down from the boiler, so that

condensation will not accumulate in the flue gas pipe.

INFORMATION

If it is not possible to connect the condensate drain to the
waste water system with a sufficient gradient in the install­ation room, a condensate lifting pump must be installed on
site.

Installation and operating instructions

20

Daikin/ROTEX A2 F

Oil condensing boiler A2 F

008.1546499_02 – 04/2018 – EN