Vaillant atmoMAG 4/1 Z Series User manual

Installation and maintenance instructions
atmoMAG
MAG ...4/1 Z
BE (de), DE
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Tel. [phone]‑0 Fax [phone]‑2810
[email protected] www.vaillant.de

Contents
2Installation and maintenance instructions atmoMAG 0020271943_00
Contents
1 Safety .................................................................... 3
1.1 Action-related warnings ......................................... 3
1.2 Intended use .......................................................... 3
1.3 General safety information .................................... 3
1.4 Regulations (directives, laws, standards) .............. 5
2 Notes on the documentation .............................. 6
2.1 Observing other applicable documents ................. 6
2.2 Storing documents................................................. 6
2.3 Validity of the instructions...................................... 6
3 Product description............................................. 6
3.1 Information on the data plate................................. 6
3.2 Product design....................................................... 6
3.3 CE label ................................................................. 7
4 Set-up.................................................................... 7
4.1 Checking the scope of delivery.............................. 7
4.2 Wall pre-installation ............................................... 7
4.3 Minimum clearances.............................................. 8
4.4 Dimensions ............................................................ 9
4.5 Requirements for the installation site .................. 11
4.6 Removing the product casing .............................. 11
4.7 Installing the product casing ................................ 11
4.8 Wall-mounting the product................................... 11
5 Installation.......................................................... 11
5.1 Information on liquid gas operation ..................... 12
5.2 Purging the liquid gas tank .................................. 12
5.3 Using the correct gas type................................... 12
5.4 Integration into a solar system............................. 12
5.5 Sequence for installing the connection................ 12
5.6 Connecting the flue pipe...................................... 13
6 Start-up ............................................................... 13
6.1 Carrying out the initial start-up............................. 13
6.2 Gas conversion.................................................... 13
6.3 Checking that the flue gas sensor works
correctly ............................................................... 13
6.4 Checking the gas flow pressure .......................... 14
6.5 Checking leak-tightness ...................................... 14
6.6 Handing the product over to the operator............ 14
7 Eliminating the fault .......................................... 14
8 Inspection and maintenance ............................ 14
8.1 Procuring spare parts .......................................... 15
8.2 Draining the product ............................................ 15
8.3 Removing the ignition electrode and ignition
gas filter ............................................................... 15
8.4 Removing the burner ........................................... 15
8.5 Cleaning the burner ............................................. 16
8.6 Cleaning the injector rail ...................................... 16
8.7 Removing the down-draught diverter .................. 17
8.8 Cleaning the down-draught diverter .................... 17
8.9 Removing the heat exchanger............................. 17
8.10 Cleaning the heat exchanger............................... 18
8.11 Repairing any damage to the coating of the
heat exchanger.................................................... 18
8.12 Checking the water valve .................................... 18
8.13 Checking the heat input....................................... 18
8.14 Setting the maximum heat input .......................... 19
8.15 Checking the maximum heat input ...................... 20
8.16 Completing inspection and maintenance work .... 20
8.17 Checking the product for leak-tightness .............. 20
9 Decommissioning.............................................. 20
10 Recycling and disposal..................................... 20
11 Customer service............................................... 20
Appendix ............................................................................ 21
A Commissioning checklist ................................. 21
B Troubleshooting ................................................ 21
C Tables of gas settings....................................... 22
D Tables of gas settings....................................... 22
E Inspection and maintenance interval .............. 23
F Technical data.................................................... 24

Safety 1
0020271943_00 atmoMAG Installation and maintenance instructions 3
1 Safety
1.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in
accordance with the severity of the possible
danger using the following warning signs and
signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of
severe personal injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental
damage
1.2 Intended use
There is a risk of injury or death to the user or
others, or of damage to the product and other
property in the event of improper use or use
for which it is not intended.
The product is designed for use as a heat
generator for hot water generation.
Depending on the unit type, the products
referred to in these instructions must only be
installed and operated in conjunction with the
air/flue pipe accessories listed in the other
applicable documents.
The use of the product in vehicles, such as
mobile homes and caravans, is not classed
as intended use. Units that are not classed
as vehicles are those that are installed in
a fixed and permanent location (known as
"fixed installation").
Intended use includes the following:
–observance of accompanying operating,
installation and servicing instructions for
the product and any other system compon-
ents
–installing and fitting the product in accord-
ance with the product and system approval
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
Intended use also covers installation in ac-
cordance with the IP code.
Any other use that is not specified in these in-
structions, or use beyond that specified in this
document shall be considered improper use.
Any direct use in industrial or commercial
processes is also deemed to be improper.
Caution.
Improper use of any kind is prohibited.
1.3 General safety information
1.3.1 Risk caused by inadequate
qualifications
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
1.3.2 Risk of death from escaping gas
What to do if you smell gas in the building:
▶Avoid rooms that smell of gas.
▶If possible, open doors and windows fully
and ensure adequate ventilation.
▶Do not use naked flames (e.g. lighters,
matches).
▶Do not smoke.
▶Do not use any electrical switches, mains
plugs, doorbells, telephones or other com-
munication systems in the building.
▶Close the emergency control valve or the
main isolator.
▶If possible, close the gas isolator cock on
the product.
▶Warn other occupants in the building by
yelling or banging on doors or walls.
▶Leave the building immediately and ensure
that others do not enter the building.
▶Alert the police and fire brigade as soon as
you are outside the building.

1 Safety
4Installation and maintenance instructions atmoMAG 0020271943_00
▶Use a telephone outside the building to
inform the emergency service department
of the gas supply company.
1.3.3 Risk of death from leaks if the
product is installed below ground
level
Liquid gas accumulates at floor level. If the
product is installed below ground level, liquid
gas may accumulate at floor level if there
are any leaks. In this case, there is a risk of
explosion.
▶Make sure that liquid gas cannot escape
from the product or the gas line under any
circumstance.
1.3.4 Risk of death due to blocked or
leaking flue gas routes
Installation errors, damage, tampering, unau-
thorised installation sites or similar can cause
flue gas to escape and result in a risk of pois-
oning.
What to do if you smell flue gas in the prop-
erty:
▶Open all accessible doors and windows
fully to provide ventilation.
▶Switch off the product.
▶Check the flue gas routes in the product
and the flue gas diversions.
1.3.5 Risk of death due to explosive and
flammable materials
▶Do not use the product in storage rooms
that contain explosive or flammable sub-
stances (such as petrol, paper or paint).
1.3.6 Risk of poisoning caused by
insufficient supply of combustion air
Conditions: Open-flued operation
▶Ensure that the air supply to the product's
installation room is permanently unobstruc-
ted and sufficient in accordance with the
relevant ventilation requirements.
1.3.7 Risk of corrosion damage due to
unsuitable combustion and room air
Sprays, solvents, chlorinated cleaning
agents, paint, adhesives, ammonia com-
pounds, dust or similar substances may lead
to corrosion on the product and in the flue
system.
▶Ensure that the supply of combustion air is
always free of fluorine, chlorine, sulphur,
dust, etc.
▶Ensure that no chemical substances are
stored at the installation site.
▶If you are installing the product in
hairdressing salons, painter's or joiner's
workshops, cleaning businesses or similar
locations, choose a separate installation
room in which the room air is technically
free of chemical substances.
▶Ensure that the combustion air is not
routed through chimneys which have
previously been used with floor-standing
oil-fired boilers, or with other boilers,
which could cause soot to build up in the
chimney.
1.3.8 Risk of poisoning due to missing flue
gas monitoring device
Flue gases may escape into the installa-
tion room under unfavourable conditions. If
this happens, the flue gas monitoring device
switches the heat generator off. If a flue gas
monitoring device has not been installed, the
heat generator will continue to run.
▶Never decommission the flue gas monitor-
ing device.
1.3.9 Risk of death due to cabinet-type
casing
Cabinet-type casing can give rise to danger-
ous situations when used on a product which
is operated with an open flue.
▶Ensure that the product is supplied with
sufficient combustion air.
1.3.10 Risk of material damage caused by
frost
▶Do not install the product in rooms prone
to frost.
1.3.11 Risk of death due to lack of safety
devices
The schematic drawings included in this doc-
ument do not show all safety devices re-
quired for correct installation.

Safety 1
0020271943_00 atmoMAG Installation and maintenance instructions 5
▶Install the necessary safety devices in the
system.
▶Observe the applicable national and inter-
national laws, standards and guidelines.
1.3.12 Risk of being burned or scalded by
hot components
▶Only carry out work on these components
once they have cooled down.
1.3.13 Risk of poisoning and burns caused
by escaping hot flue gases
▶Only operate the product if the flue gas
guiding has been completely installed.
▶With the exception of short periods for
testing purposes, only operate the product
when the front casing is installed and
closed.
1.3.14 Risk of material damage caused by
using an unsuitable tool
▶Use the correct tool.
1.4 Regulations (directives, laws,
standards)
Applicability: Germany
OR Belgium
▶Observe the national regulations, stand-
ards, directives and laws.

2 Notes on the documentation
6Installation and maintenance instructions atmoMAG 0020271943_00
2 Notes on the documentation
2.1 Observing other applicable documents
▶You must observe all the operating and installation in-
structions included with the system components.
2.2 Storing documents
▶Pass these instructions and all other applicable docu-
ments on to the system operator.
2.3 Validity of the instructions
These instructions apply only to:
Product article number
Applicability: Germany
OR Belgium
MAG 114/1 Z(E-
BE/FR)
Belgium 0010022555
MAG 114/1 Z(E-DE) Germany 0010022556
MAG 114/1 Z(LL-
DE)
Germany 0010022557
MAG 114/1 Z(P-
BE/FR)
Belgium 0010022554
MAG 144/1 Z(E-BE) Belgium 0010022544
MAG 144/1 Z(E-DE) Germany 0010022562
MAG 144/1 Z(LL-
DE)
Germany 0010022563
MAG 144/1 Z(P-BE) Belgium 0010022546
3 Product description
3.1 Information on the data plate
The data plate is mounted at the front of the down-draught
diverter, under the product casing, at the factory.
Applicability: Belgium
OR Germany
Information on the
data plate
Meaning
MAG Product category
11/14 Power in l/min
-4/1 Chimney connection/product generation
Z With Piezo ignition
atmoMAG Product series
Type B11 BS Approved gas boiler types
Cat I
Cat II
Single-gas unit
Multiple gas type boiler
2E+ (BE)
3P (BE)
2ELL 3P (DE)
Permissible gas categories
G20/25/31 Permitted gas types with connection
pressures
Pnom. Maximum heat output
Pmin. Minimum heat output
Qnom. Maximum heat input
Information on the
data plate
Meaning
Qmin. Minimum heat input
Pw max. Maximum permissible water pressure
Serial number 7th to 16th digit = product article number
3.2 Product design
Applicability: MAG 114/1 Z(E-BE/FR)
OR MAG 114/1 Z(E-DE)
OR MAG 114/1 Z(LL-DE)
OR MAG 114/1 Z(P-BE/FR)
1
2
4
3
5
67
8
9
10
12
11
1 Down-draught diverter
2 Flue gas sensor
3 Safety cut-out
4 Heat exchanger
5 Burner
6 Flow rate se-
lector/temperature
selector
7 Gas valve assembly
8 Rotary power switch
9 Piezo igniter
10 Ignition electrode
11 Thermocouple
12 Pilot burner

Set-up 4
0020271943_00 atmoMAG Installation and maintenance instructions 7
Applicability: MAG 144/1 Z(E-BE)
OR MAG 144/1 Z(E-DE)
OR MAG 144/1 Z(LL-DE)
OR MAG 144/1 Z(P-BE)
1
2
4
3
5
67
8
9
10
12
11
1 Down-draught diverter
2 Flue gas sensor
3 Safety cut-out
4 Heat exchanger
5 Burner
6 Flow rate se-
lector/temperature
selector
7 Gas valve assembly
8 Rotary power switch
9 Piezo igniter
10 Ignition electrode
11 Thermocouple
12 Pilot burner
3.3 CE label
The CE label shows that the products comply with the basic
requirements of the applicable directives as stated on the
identification plate.
The declaration of conformity can be viewed at the manufac-
turer's site.
4 Set-up
4.1 Checking the scope of delivery
1. Remove the product from its box.
2. Check that the scope of delivery is complete and intact.
4.1.1 Scope of delivery
Num-
ber Description
1 Gas-fired instantaneous water heater
1 Connection accessories that are included
1 Enclosed documentation
4.2 Wall pre-installation
60 60
a
3 1
2
Flush mounting
60 60
c
b
3
1
2
Surface installation
▶Install the connections as follows:
–1 = Cold water connection R 1/2
–2 = Gas connection
–3 = R 1/2 hot water connection
▶Observe the following clearances for all product types:
–a = 92 mm
–b = 85 mm
–c≈100 mm without thermal isolator device
–c≈145 mm with thermal isolator device

4 Set-up
8Installation and maintenance instructions atmoMAG 0020271943_00
4.3 Minimum clearances
B A
C C D
Minimum clearance
A 50 mm
B 180 mm; optimum approx. 250 mm
C 20 mm; optimum approx. 50 mm
D 500 mm in front of the heat generator to enable
easy access for maintenance work (may be
provided by an opening door).
It is not necessary to maintain a clearance between the
product and components made of combustible materials that
go beyond the minimum clearances.

Set-up 4
0020271943_00 atmoMAG Installation and maintenance instructions 9
4.4 Dimensions
Applicability: MAG 114/1 Z(E-BE/FR)
OR MAG 114/1 Z(E-DE)
OR MAG 114/1 Z(LL-DE)
OR MAG 114/1 Z(P-BE/FR)
350
270
172,5
50
26
259
115
113 61,4
min. 20 120 min. 20
Ø110
224
617 48
A
557
579
680
616
Height, dimension A
Germany Belgium
MAG 114/1 Z(E-BE/FR) 658 mm
MAG 114/1 Z(E-DE) 658 mm
MAG 114/1 Z(LL-DE) 658 mm
MAG 114/1 Z(P-BE/FR) 616 mm
MAG 144/1 Z(E-BE) 658 mm
MAG 144/1 Z(P-BE) 616 mm
MAG 144/1 Z(E-DE) 658 mm
MAG 144/1 Z(LL-DE) 658 mm

4 Set-up
10 Installation and maintenance instructions atmoMAG 0020271943_00
Applicability: MAG 144/1 Z(E-BE)
OR MAG 144/1 Z(E-DE)
OR MAG 144/1 Z(LL-DE)
OR MAG 144/1 Z(P-BE)
270
172,5
50
26
259
124
350
141 61,4
min. 20 120 min. 20
Ø133,5
224
617 48
A
493
679
680
616
Height, dimension A
Germany Belgium
MAG 114/1 Z(E-BE/FR) 658 mm
MAG 114/1 Z(E-DE) 658 mm
MAG 114/1 Z(LL-DE) 658 mm
MAG 114/1 Z(P-BE/FR) 616 mm
MAG 144/1 Z(E-BE) 658 mm
MAG 144/1 Z(P-BE) 616 mm
MAG 144/1 Z(E-DE) 658 mm
MAG 144/1 Z(LL-DE) 658 mm

Installation 5
0020271943_00 atmoMAG Installation and maintenance instructions 11
4.5 Requirements for the installation site
▶Select the installation site so that the pipes can be easily
routed (gas supply, water supply and drain).
▶Do not install the product above an appliance whose use
may damage the gas-fired instantaneous water heater
(e.g. above a cooker that can emit grease vapours).
▶Heat-insulate the wall on which you want to install the
product if the wall is made of a combustible material,
such as wood, so that the minimum clearance between
the hot back panel of the product and the wall is complied
with.
▶Do not install the product in closed rooms.
4.6 Removing the product casing
A
B
C
4.7 Installing the product casing
B
C
A
4.8 Wall-mounting the product
1. Check the load-bearing capacity of the wall.
2. Note the total weight of the product.
3. Only use fixing material that is permitted for the wall.
4. If required, ensure that mounting apparatus on-site has
sufficient load-bearing capacity.
5. Wall-mount the product as described.
6. Drill the holes for the fixing screws while taking into
consideration the dimensions.
7. To secure the product, depending on the installation
site, use wall anchors, hooks, bolts or threaded bolts as
the fixing material.
8. Use suitable fixing material to install the back wall of the
unit to the wall.
5 Installation
Danger!
Risk of scalding and/or damage due to
incorrect installation leading to escaping
water.
Stresses in supply lines can cause leaks.
▶Install the supply lines so that they are
free from mechanical stress.
▶If you use plastic supply lines for the do-
mestic hot and cold water connection,
these must withstand temperatures up
to 95 °C and pressures up to 1.3 MPa
(13 bar).

5 Installation
12 Installation and maintenance instructions atmoMAG 0020271943_00
Caution.
Risk of material damage due to the gas
leak-tightness test.
At a test pressure of >11 kPa (110 mbar), gas
leak-tightness tests may cause damage to
the gas valve.
▶If, during gas leak-tightness tests, you
also place the gas lines and the gas valve
in the product under pressure, use a max.
test pressure of 11 kPa (110 mbar).
▶If you cannot limit the test pressure to
11 kPa (110 mbar), close any gas isolator
cocks that are installed upstream from the
product before you carry out the gas leak-
tightness test.
▶If, during gas leak-tightness tests, you
have closed the gas isolator cock that is
installed upstream of the product, relieve
the gas line pressure before you open this
gas isolator cock.
▶Make sure that the existing gas meter is capable of
passing the rate of gas supply required.
5.1 Information on liquid gas operation
In the as-supplied condition, the product is preset for opera-
tion with the gas group indicated on the data plate.
Applicability: Except Belgium
If you have a product that has been preset for operation with
natural gas, you must convert it to run on liquid gas. You will
need a conversion set for this. The conversion procedure
is described in the instructions supplied with the conversion
set.
5.2 Purging the liquid gas tank
If the liquid gas tank is not purged properly, this may result in
ignition problems.
▶Ensure that the liquid gas tank has been purged properly
before installing the product.
▶If required, contact the filler or the liquid gas supplier.
5.3 Using the correct gas type
Using the incorrect gas type may cause fault shutdowns in
the product. Ignition and combustion noise may occur in the
product.
▶Only use the gas type listed on the data plate.
5.4 Integration into a solar system
The inlet temperature must not exceed 45 °C.
The hot water temperature must not exceed 60 °C.
▶Install thermostatic 3-way valves.
5.5 Sequence for installing the connection
1. Install the domestic hot water connection.
2. Install the cold water connection.
3. Install the gas connection.
5.5.1 Descaling the water
The probability of scale increases as the water temperature
increases.
▶Descale the water as required.
5.5.2 Installing the domestic hot and cold water
connection
Warning.
Risk of adverse health effects caused by
impurities in the potable water.
Sealing residues, dirt or other residues in the
pipelines may adversely affect the quality of
the potable water.
▶Flush all of the hot and cold water pipes
thoroughly before you install the product.
▶Make the water connections in accordance with the relev-
ant standards.
5.5.3 Installing the gas connection
▶Install the gas pipe in accordance with the recognised
rules of technology.
▶Connect the product to the gas pipe in accordance with
the recognised rules of technology.
▶Remove the residues from the gas pipe by blowing
through the gas pipe beforehand.
▶Purge the gas pipe before start-up.
▶Check the entire gas supply properly for leak-tightness.

Start-up 6
0020271943_00 atmoMAG Installation and maintenance instructions 13
5.6 Connecting the flue pipe
1
2
▶Use a flue pipe with the diameter that is specified in the
technical data to connect the product to a flue system
that has a natural draught (hearth).
▶Insert the flue pipe (1) into the flue pipe connection (2) on
the down-draught diverter.
6 Start-up
6.1 Carrying out the initial start-up
Initial start-up must be carried out by a customer service
technician or a qualified competent person.
▶Remove the product casing (→Page 11).
▶When starting up the unit, proceed in accordance with
the attached checklist.
Commissioning checklist (→Page 21)
6.2 Gas conversion
Applicability: Except Belgium
1. Observe the applicable national regulations.
2. To convert the gas, use only Vaillant conversion sets or
Vaillant spare parts.
3. Follow the instructions contained in the documentation
that is supplied with the conversion sets or spare parts.
6.3 Checking that the flue gas sensor works
correctly
If the flue system is fully or partially blocked or the local air
pressure conditions restrict the smooth flue system, the flue
gas sensor registers an increase in temperature and inter-
rupts the gas supply.
Check that the flue gas sensor is working correctly, as de-
scribed below.
2
1
▶Start up the product with the product casing attached.
▶Turn the temperature selector (1) clockwise as far as it
goes and turn the rotary power switch (2) anti-clockwise
as far as it goes in order to set the lowest water volume
and the maximum gas volume.
▶Open a hot water tap.
▶Ensure that the water pressure is at least 0.13 MPa
(1.3 bar) during the test.
▶Operate the product until a steady state is reached (ap-
prox. 10 minutes).
▶Block off the flue gas route with a Vaillant flue gas re-
strictor, for example. Also observe the documentation
enclosed with the flue gas restrictors.
◁The flue gas sensor must automatically interrupt the
gas supply within two minutes.
▶Close the hot water tap.
▶Allow the flue gas sensor to cool for at least 15 minutes.
▶Start up the product again.
▶If the start-up does not work or the product is repeatedly
blocked by a safety device, check the product or contact
Vaillant Customer Service.
▶In this case, shut down the product.

7 Eliminating the fault
14 Installation and maintenance instructions atmoMAG 0020271943_00
6.4 Checking the gas flow pressure
Applicability: Germany
OR Belgium
1
▶Close the gas stopcock.
▶Unscrew the sealing screw (1) from the test nipple on the
gas valve assembly.
▶Remove the seal.
▶Connect a manometer to the test nipple on the gas valve
assembly.
▶Open the gas stopcock.
▶Start up the product in accordance with the operating
instructions and draw off domestic hot water.
▶Measure the gas flow pressure.
Applicability: Germany
Gas family Permissible gas flow pres-
sure
Natural gas
G20
G25
1.7–2.5 kPa (17–25 mbar)
1.8-2.5 kPa (18-25 mbar)
Liquid gas
G31 4.25-5.75 kPa (42.5-
57.5 mbar)
Applicability: Belgium
Gas family Permissible gas flow pres-
sure
Natural gas
G20
G25
1.7–2.5 kPa (17–25 mbar)
2.0-3.0 kPa (20-30 mbar)
Liquid gas
G31 2.5–4.5 kPa (25–45 mbar)
Conditions: Gas connection pressure not in the permissible range
Danger!
Risk of material damage and operating
faults caused by incorrect gas flow pres-
sure.
If the gas flow pressure lies outside the per-
missible range, this can cause operating
faults in and damage to the product.
▶Do not make any adjustments to the
product.
▶Check the gas installation.
▶Do not start up the product.
▶If you are unable to remedy the fault, contact the gas
supply company.
▶Close the gas stopcock.
▶Remove the pressure gauge.
▶Position the seal on the sealing screw.
▶Screw the sealing screw (1) into the test nipple on the
gas valve assembly again.
▶Open the gas stopcock.
▶Check the test nipple for gas tightness.
6.5 Checking leak-tightness
▶Check the gas pipe and the hot water circuit for leak-
tightness.
▶Check that the flue system has been installed correctly.
6.6 Handing the product over to the operator
1. Explain to the operator how the safety devices work and
where they are located.
2. Inform the operator how to handle the product. Answer
any questions the operator may have.
3. Draw special attention to the safety instructions which
the operator must follow.
4. Inform the operator of the necessity to have the product
maintained according to the specified intervals.
5. Pass all of the instructions and documentation for the
product to the operator for safe-keeping.
6. Inform the operator about measures taken to ensure the
supply of combustion air and flue gas guiding, and in-
struct the operator that he must not make any changes.
7 Eliminating the fault
▶Use the table that is included in the appendix to eliminate
the fault.
▶After each time you eliminate a fault, check that the flue
gas sensor is working without any problems.
▶If you are unable to eliminate the fault, contact Vaillant
Customer Service.
8 Inspection and maintenance
▶Adhere to the minimum inspection and maintenance in-
tervals. The inspection may require maintenance to be

Inspection and maintenance 8
0020271943_00 atmoMAG Installation and maintenance instructions 15
carried out earlier, depending on the results. You can
find the inspection and maintenance work table in the ap-
pendix.
8.1 Procuring spare parts
The original components of the product were also certified
by the manufacturer as part of the declaration of conformity.
If you use other, non-certified or unauthorised parts during
maintenance or repair work, this may void the conformity of
the product and it will therefore no longer comply with the
applicable standards.
We strongly recommend that you use original spare parts
from the manufacturer as this guarantees fault-free and safe
operation of the product. To receive information about the
available original spare parts, contact the contact address
provided on the reverse of these instructions.
▶If you require spare parts for maintenance or repair
work, use only the spare parts that are permitted for the
product.
8.2 Draining the product
1
1. Close the gas isolation valve and the isolation valve
upstream of the cold water inlet.
2. Loosen the drain screw (1) and the sealing ring for the
draining.
3. Open all of the hot water taps that are connected to the
product so that the product and lines drain until they are
completely empty.
8.3 Removing the ignition electrode and ignition
gas filter
Danger!
Risk of being burned or scalded by hot
components!
The burner assembly and all water-carry-
ing components present a risk of burns and
scalding.
▶Only carry out work on these components
once they have cooled down.
A
A
2
1
1. Unscrew the nuts (1) from the ignition gas pipe.
2. Carefully remove the ignition gas pipe.
3. Unscrew the bolt (2) for securing the ignition gas fitting
to the burner and remove the ignition gas fitting.
8.4 Removing the burner
1. Drain the product.
2. Remove the cold water connection from the product.
3. Remove the gas connection from the product.
B
A
C
4. Unscrew the union nuts from the water valve. Remove
the clip from the cold water connection on the burner.
5. Remove the pipe from the water valve and pull it out of
the cold water connection on the burner.

8 Inspection and maintenance
16 Installation and maintenance instructions atmoMAG 0020271943_00
C
B
A
6. Remove the two screws from the injector rail.
7. Remove the two screws from the gas valve assembly.
8. Remove the gas valve assembly together with the water
valve.
B
C
A
9. Unscrew the union nuts from the water connection for
the heat exchanger on the burner.
10. Remove four screws.
11. Raise the burner slightly and carefully pull the burner
forwards and out.
8.5 Cleaning the burner
1. Use a brass wire-brush to carefully remove combustion
residues from the burner without damaging the burner.
2. Clean the jets, injectors and burner rails with a soft
brush and blow out any dust or dirt outside the install-
ation room from the outside to the inside using com-
pressed air.
3. If the burner is extremely dirty, clean it with soapy water
and rinse it thoroughly with clean water.
8.6 Cleaning the injector rail
1. Check the components of the injector rail for dirt and
damage. You must never remove the burner jets.
2. Clean the dirty components using a soft brush (leaving
the installation room to do so), and replace any dam-
aged components if required.
3. Check whether the burner jets are blocked. If a jet is
blocked, carefully remove the blockage without dam-
aging this jet.

Inspection and maintenance 8
0020271943_00 atmoMAG Installation and maintenance instructions 17
8.7 Removing the down-draught diverter
D
C
E
B
A
1. Remove the cables from the flue gas sensor.
2. Remove two screws each from the fixing plates on the
heat exchanger.
3. Remove two screws each for securing the down-
draught diverter on the back panel of the product.
4. Pull out the down-draught diverter.
8.8 Cleaning the down-draught diverter
1. Remove the down-draught diverter. (→Page 17)
2. Blow any dust and dirt out of the slits in the down-
draught diverter. Use a soft brush to remove any dust
and greasy dirt from the outside of the down-draught
diverter. Only use water if the flue gas sensor has been
removed.
8.9 Removing the heat exchanger
D
B
C
A
Caution.
Risk of material damage caused by dam-
age to the heat exchanger.
Damage that occurs when installing and re-
moving the heat exchanger leads to prema-
ture wear.
▶When installing or removing the heat ex-
changer, ensure that it does not become
damaged or bent out of shape.
▶Remove the heat exchanger in the spe-
cified sequence.
1. Unscrew the union nuts from the domestic hot water
connection on the heat exchanger.
2. Unscrew the screw from the clamp for securing the do-
mestic hot water outlet.
3. Remove the safety cut-out that is secured using a clip
on a pipe to the right on the heat exchanger.
4. Remove the heat exchanger.

8 Inspection and maintenance
18 Installation and maintenance instructions atmoMAG 0020271943_00
8.10 Cleaning the heat exchanger
1. Use a spray of water to rinse through the fins of the
heat exchanger.
2. Use a soft brush to remove the heavier soiling on the
fins of the heat exchanger.
–Ensure that you do not bend the fins on the heat
exchanger.
3. If required/necessary, remove any grease and dust by
adding a fat-dissolving cleaning agent to a container of
hot water.
4. Use a commercial descaler to remove any limescale,
while taking into consideration the corresponding docu-
mentation.
5. Rinse the heat exchanger under running water.
8.11 Repairing any damage to the coating of the
heat exchanger
1. Use a Supral pen to repair minor damage to the heat
exchanger coating.
2. Ensure that the damaged area is free from deposits and
greasy residues.
3. Shake the Supral pen vigorously before use.
4. Apply the coating material thinly and evenly.
8.12 Checking the water valve
2
3
1
A
B
1. Remove the cold water connection line from the cold
water connection (2).
2. Visually check the cold water strainer (3) that is down-
stream of the cold water connection for dirt and scale.
3. If the cold water strainer is dirty or calcified, remove the
clamp (1) and pull out the cold water connection.
4. Remove the cold water strainer from the cold water
connection and clean the cold water strainer.
5. Reinsert the cold water strainer into the cold water con-
nection.
6. Reinsert the cold water connection into the product's
retainer and secure the clip.
7. Secure the cold water connection line to the cold water
connection again.
8. Check whether the temperature selector spindle can be
turned. Otherwise, loosen the clamps on the temperat-
ure selector spindle, remove these and clean the tem-
perature selector spindle.
9. Check the stuffing box for tightness. If a stuffing box is
leaking, replace the water valve.
8.13 Checking the heat input
▶Check the heat input either by reading off the gas flow
values at the counter (volumetric method) or by checking
the burner pressure (burner pressure test method).
Volumetric method
2
1
▶When carrying out the check, ensure that no additional
gases (e.g. mixtures of liquid gas and air) are fed in to
cover the peak demand. Contact the responsible gas
supply company for this.
▶Ensure that no other gas-fired boilers are operated during
the check.
▶Start up the product.
▶Turn the temperature selector (1) clockwise as far as it
will go in order to reduce the water volume and set the
maximum water temperature.
▶Turn the rotary power switch (2) as far as it will go anti-
clockwise to set the maximum product output.
▶Determine the required gas flow value at nominal heat
input in accordance with the tables of gas settings in the
appendix.
▶Note down the gas meter reading.
▶Draw off domestic hot water with the water tap fully open
to enable the nominal water volume to flow (→Technical
data).
▶After approx. five minutes of the product running in
continuous operation, read off the gas flow value at
the meter and compare this with the gas flow value at
nominal heat input in the tables of gas settings in the
appendix.
Note
Deviations of ±5% are permitted.

Inspection and maintenance 8
0020271943_00 atmoMAG Installation and maintenance instructions 19
Conditions: The deviation is greater than ±5%
▶Check whether the correct burner jets have been used in
the injector rail for the burner by comparing the labels on
the burner jets with the specifications in the tables of gas
settings in the appendix.
▶If incorrect burner jets have been used, contact Customer
Service. Do not start up the product.
▶If the correct burner jets are being used, continue with
the following steps.
▶Remove the burner. (→Page 15)
▶Clean the burner. (→Page 16)
▶Refit the burner assembly in the reverse order.
▶Repeat the check of the heat input.
Applicability: Except Belgium
▶If the deviation continues to be greater than ±5%, adjust
the maximum heat input (→Page 19).
Applicability: Belgium
▶If the deviation continues to be greater than ±5%, check
the heat input (→Page 20).
Burner pressure test method
1
▶Unscrew the sealing screw from the test nipple (1) for the
burner pressure.
▶Remove the seal.
▶Connect a manometer (resolution at least 0.1 bar).
▶Start up the product.
▶Turn the temperature selector clockwise as far as it will
go in order to reduce the water volume and set the max-
imum water temperature.
▶Turn the rotary power switch as far as it will go anti-clock-
wise to set the maximum product output.
▶Draw off domestic hot water with the water tap fully open
to enable the nominal water volume to flow (→Technical
data).
▶Look up the required burner pressure in the tables of gas
settings in the appendix and compare the value with the
corresponding value in the table.
Note
Deviations of ±10% are permitted.
▶Remove the manometer.
▶Place the sealing screw and the seal on the test nipple,
tighten the sealing screw and check that it is leak-tight.
Conditions: The deviation is greater than ±10%
▶Check whether the correct burner jets have been used in
the injector rail for the burner by comparing the labels on
the burner jets with the specifications in the tables of gas
settings in the appendix.
▶If incorrect burner jets have been used, contact Customer
Service. Do not start up the product.
▶If the correct burner jets are being used, continue with
the following steps.
▶Remove the burner. (→Page 15)
▶Clean the burner. (→Page 16)
▶Refit the burner assembly in the reverse order.
▶Repeat the check of the heat input.
Applicability: Except Belgium
▶If the deviation continues to be greater than ±10%, adjust
the maximum heat input (→Page 19).
Applicability: Belgium
▶If the deviation continues to be greater than ±10%, check
the maximum heat input (→Page 20).
8.14 Setting the maximum heat input
Applicability: Except Belgium
1
2
1. Turn the temperature selector clockwise as far as it
will go in order to reduce the water volume and set the
maximum water temperature.
2. Turn the rotary power switch as far as it will go anti-
clockwise to set the maximum product output.

9 Decommissioning
20 Installation and maintenance instructions atmoMAG 0020271943_00
3. Unscrew the sealing screw from the test nipple (1) for
the burner pressure.
4. Connect a U-tube manometer (resolution at least
0.1 bar).
Caution.
Risk of a gas leak
The adjusting screw seals the gas valve as-
sembly in the housing.
▶Never fully unscrew the adjusting screw.
5. Use a flat-blade screwdriver to set the maximum heat
input on the adjusting screw (2).
6. Read off the value for the maximum heat input on the
U-tube manometer.
7. If you are unable to set the correct values in accord-
ance with the tables of gas settings in the appendix, do
not start up the product. Report this to customer ser-
vice.
8. Remove the U-tube manometer.
9. Place the sealing screw and the seal on the test nipple,
tighten the sealing screw and check that it is leak-tight.
8.15 Checking the maximum heat input
Applicability: Belgium
1
1. Turn the temperature selector clockwise as far as it
will go in order to reduce the water volume and set the
maximum water temperature.
2. Turn the rotary power switch as far as it will go anti-
clockwise to set the maximum product output.
3. Unscrew the sealing screw from the test nipple (1) for
the burner pressure.
4. Connect a U-tube manometer (resolution at least
0.1 bar).
5. Read off the value for the heat input on the U-tube
manometer.
6. If the measured values do not match the values in the
tables of gas settings in the appendix, do not start up
the product. Report this to Vaillant Customer Service.
7. Remove the U-tube manometer.
8. Place the sealing screw and the seal on the test nipple,
tighten the sealing screw and check that it is leak-tight.
8.16 Completing inspection and maintenance
work
▶Install all of the components in reverse order.
▶Install the product casing (→Page 11).
▶Start up the product.
▶Check that all control, regulation and monitoring devices
and, in particular, the flue gas sensor (→Page 13) are
working properly.
▶Check that the product and the flue system are leak-tight.
▶Log all maintenance work that is carried out.
8.17 Checking the product for leak-tightness
▶Check that the product is leak-tight. (→Page 14)
9 Decommissioning
▶Close the gas isolator cock.
▶Close the cold water stop valve.
▶Drain the product. (→Page 15)
10 Recycling and disposal
Disposing of the packaging
▶Dispose of the packaging correctly.
▶Observe all relevant regulations.
11 Customer service
Applicability: Belgium
N.V. Vaillant S.A.
Golden Hopestraat 15
B-1620 Drogenbos
Belgien, Belgique, België
Kundendienst / Service après-vente / Klantendienst:
2 3349352
Applicability: Germany
Auftragsannahme Vaillant Kundendienst: 021 91 5767901