Atag A200S Release note

8G.51.59.05/08.11 Changes reserved.
Installation & Servicing
Instructions
These instructions to be retained by user.
Boiler G.CNo
A200S 41-310-14
A320S 41-310-17
A203C 47-310-15
A325C 47-310-17
A325ECX 47-310-18
CE PIN 0063BT3195
A200S A203C
A320S A325C
A325ECX

Installation&ServicinginstructionsATAGA-Series
2
Explanation of the control panel and keys
%
ba
r
°C
(OK )
( ESC)
+
--
i
R
+
FlameBoiler in operation
  Bell Error indication
Spanner Service-mode or blocking
Tap DHW function (request for heat)
Radiator Central heating function (request for heat)
Central heating program
Hot water program
Pump program
Scrolland+/-function(ancillaryfunction)  OKandEscape(ancillaryfunction)
Setting of hot water temperature Setting of boiler temperature (max. supply temperature)
Information key Reset key
LCD display with backlight
Directly operated soft cushion keys
Information on the water pressure:
The default view of the display shows the water pressure (bar) in the CH unit.
If the water pressure gets (too) low it is indicated as follows:
Press the i-key until A6.
or The actual water pressure will be shown
After the installation has been relled and if the pressure was below 0.7 bar the de-
aeration program will start. This will last for approx 7 mins.
If the water pressure is too high, it will be displayed as follows:
Waterpressureistoolow(<1.0bar).
Bellsymbolvisibleandc118.
Powerisreducedby20%.
Theinstallationshouldberefilled.
Waterpressureistoohigh(>3.0bar).
Bellsymbolvisibleandc117.
Theboileristakenoutofoperation.
Theinstallationpressureshouldbereduced
bydrainingwaterfromtheheatingsystem.
Waterpressureistoolow(<0.7bar).
Bellsymbolvisibleandc118.
Theboileristakenoutofoperation.
Theinstallationshouldberefilled.
ba
r

Installation&ServicinginstructionsATAGA-Series
3
Contents
1 Introduction ....................................................................................................................................4
2 Rules ............................................................................................................................................4
3 Delivery package ............................................................................................................................6
4 Boiler description ............................................................................................................................6
5 Mounting the boiler .........................................................................................................................7
5.1 Dimensions .........................................................................................................................8
6 Connecting the boiler .....................................................................................................................9
6.1 Central heating system .......................................................................................................9
6.2 Expansion vessel .............................................................................................................. 11
6.3 Heating systems with plastic pipes ...................................................................................12
6.4 Gas connection .................................................................................................................12
6.5 Hot water supply (DHW Combi boilers) ............................................................................13
6.6 Condensation drain pipe ...................................................................................................14
6.7 Flue gas exhaust system and air supply system ..............................................................16
6.7.1 Dimensioning of the ue gas and air intake duct ............................................................20
7 External hot water cylinders (Solo boilers) ...................................................................................21
8 Electrical connection ....................................................................................................................21
8.1 Room thermostat ..............................................................................................................22
8.2 Electrical diagram Solo boiler ...........................................................................................23
8.3 Electrical diagram Combi boiler ........................................................................................24
9 Filling and bleeding of boiler and CH installation .........................................................................25
9.1 Hot water supply ...............................................................................................................25
10 Boiler controls ..............................................................................................................................26
9.1 Controls and explanation of the functions .........................................................................27
11 Commissioning the boiler .............................................................................................................28
11.1 Hot water supply ...............................................................................................................28
11.2 CH system ........................................................................................................................28
11.3 Pump function ...................................................................................................................28
11.4 Settings .............................................................................................................................29
11.5 Activating the factory setting (green key function) ............................................................31
12 Isolating the boiler .......................................................................................................................32
13 Commissioning .............................................................................................................................32
13.1 Checking the O2 ................................................................................................................33
13.3 Maintenance activities .......................................................................................................34
13.3 Maintenance frequency .....................................................................................................36
13.4 Warranty ............................................................................................................................36
14 Error message .............................................................................................................................36
15 Technical specications ................................................................................................................37
16 Parts of the boiler .........................................................................................................................38
17 Declaration of Conformity .............................................................................................................39
18 Kiwa certicate .............................................................................................................................40
Benchmark Checklist ...................................................................................................................41
Service Record .............................................................................................................................42
Work on the installation should only be carried out by qualied personnel
with calibrated equipment.

Installation&ServicinginstructionsATAGA-Series
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1 Introduction
These instructions describe the functioning, installation, use and primary maintenance of
ATAG central heating boilers for the United Kingdom and Ireland. Where necessary the
different regulations for each country are separately described.
These instructions are intended for the use of Gas Safe registed installers or registered
Bord Gais installers in connection with the installation and putting into operation of ATAG
boilers. It is advisable to read these instructions thoroughly, well in advance of installation.
Separate instructions for use are supplied with the boiler for users of ATAG central heating
boilers. ATAG is not liable for the consequences of mistakes or shortcomings which have
found their way into the installation instructions or user’s manual. Further, ATAG reserves
the right to alter its products without prior notication.
When delivering the boiler, give the customer clear instructions concerning its
use; present the customer with the user’s manual and card.
Each boiler is tted with an identication plate. Consult the details on this plate to verify
whether the boiler is compliant with its intended location, e.g.: gas type, power source
and exhaust classication.
On completion of the installation the installer or commissioning engineer must ll out
and complete the Benchmark Commissioning Checklist found on page 41 of this manual
and hand this to the customer for future record keeping. The Benchmark Service Record
must also be completed by the service agent following each service call, and return to
the customer. A copy of the Benchmark Commissioning Checklist must be returned to
ATAG Heating along with the warranty registration card to register the appliance for the
standard warranty benets.
Relevant Installation, Service and User manuals:
- ATAG Monopass Flue system guide
2 Rules
The following regulations apply to installation of ATAG central heating boilers:
Legislation and Regulations.
Gas Safety (Installation and Use). All gas appliances must by law, be installed by a competent
person, eg. Members of Gas Safe Register and in accordance with the current Gas Safety
Regulation. Failure to install appliance correctly could lead to prosecution.
All Gas Safe registered installers carry a Gas Safe ID card and have a registration number.
You can call Gas Safe Register directly on 0800 408 5577.
In addition to the above regulations this appliance must be installed in compliance with the
current IEE Regulations, the Building Standards (Scotland Consolidation) Regulations.
Regulations and bye laws of the Local Water Authority and the Current Health and Safety
Regulation.
The Benchmark Scheme
Benchmark places responsibilities on both manufacturers and installers. The purpose
is to ensure that customers are provided with the correct equipment for their needs,
that it is installed, commissioned and serviced in accordance with the manufacturer’s
instructions by competent persons and that it meets the requirements of the appropriate
Building Regulations. The Benchmark Checklist can be used to demonstrate compliance
with Building Regulations and should be provided to the customer for future reference.

Installation&ServicinginstructionsATAGA-Series
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Installers are required to carry out installation, commissioning and servicing work in
accordance with the Benchmark Code of Practice which is available from the Heating
and Hotwater Industry Council who manage and promote the Scheme.
Visit www.centralheating.co.uk for more information.
Ireland:
- Irish standard 813
- Domestic gas installations
The current Electricity at Work Regulation must be complied with and also be in
accordance with the relevant and current editions of the British Standards.
The ATAG A boiler is a certied appliance and must not be modied or installed in any
way contrary to this Installation Manual. Manufacturers instructions must not be taken,
in any way, as overriding statutory obligations.
The ATAG A is a central heating boiler with an optional integrated hot water function.
These boilers must be connected according to these instructions and all installation norms
in respect of the part of the boiler to be connected.
Observe the following rules of safety:
- All work on the boiler must take place in a dry environment.
- ATAG boilers may never be in operation without their housing, except in connection
with maintenance or adjustments (see Chapter 13 and 14).
- Never allow electrical or electronic components to come into contact with water.
Carry out the following tasks in connection with maintenance, etc. to an already-installed
boiler:
- Shut down all programs
- Close the gas tap
- Remove the plug from the wall socket
- Close the stop cock of the boiler’s intake connection
Take note of the following when maintenance or adjustments are needed:
- The boiler must be able to function during these activities; for this reason, the boiler’s
supply voltage, gas pressure and water pressure must be maintained. Ensure that
there is not a source of potential danger during these activities.
Following maintenance or other activities; always check the installation of all parts
through which gas ows (using leak-search spray).
The following (safety) symbols may be encountered in these installation instructions and
on the boiler:
This symbol indicates that the boiler must be stored away from frost.
This symbol indicates that the packaging and/or contents can be damaged as a
result of insufcient care taken during transport.
This symbol indicates that, whilst still in its packaging, the boiler must be
protected from weather conditions during transport and storage.
KEY-symbol. This symbol indicates that assembly or dismantling, must be
carried out.
ATTENTION symbol. This symbol indicates that extra attention must be paid in
connection with a particular operation.
Useful tip or advice

Installation&ServicinginstructionsATAGA-Series
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3 Delivery package
The boiler is delivered ready for use. The delivery package is composed as follows:
• Boiler with cover;
• Automatic air vent (in boiler);
• Safety valve 3 bar
• Three way valve (in boiler, only Combi);
• Expansion vessel 8liter / 0,8 bar or 12liter / 1 bar (in boiler);
• Dosing valve;
• Commissioning valves with drainpoint (CH 2x, 1x DHW cold)
• Gas isolating valve;
• Flue non return valve (pre-assembled in boiler)
• Suspension bracket;
• Fittings consisting of plugs and screws;
• Drawing template;
• Installation instruction;
• User manual;
• Warranty Card and Benchmark logbook.
The ATAG A is mainly equipped with 230V electrical components.
The following components are not present in the boiler as a standard and should be
included in the installation according to the requirements (supplied by third parties):
• Filling loop;
• Automatic by-pass;
• External controls.
4 Boiler description
The ATAG A is a room sealed, condensing and modulating CH boiler equipped with an
integrated hot water supply.
The boiler is equipped with a compact stainless steel heat exchanger with smooth pipes.
It is a well thought-out principle using sustainable materials.
The boiler burns (natural) gas to supply heat. This heat is transferred in the heat
exchanger to the water in the CH installation. The rapid cooling off of the ue gases causes
condensation. This results in a very high efciency. The condensate that is formed, has
no negative impact on the heat exchanger and it's operation, and is removed through
the internal syphon.
The boiler is equipped with an intelligent control system: CMS (Control Management
System). Each boiler anticipates the heat demand of the heating installation or hot water
demand. This will cause the boiler to tune its capacity to the installation. This means that
the boiler will function longer and at a low level.
If an outside sensor is connected, the control system is able to function, depending on the
weather. This means that the control system measures the outside temperature and the
supply water temperature. On the basis of this information the control system calculates
optimum supply water temperature required for the installation.
The boiler has been tested according to valid CE standards and has a CE certicate and
SEDBUK A-rating.
Statement: No banned materials including asbestos, mercury, CFC's have or will not be
included in the product.
Room sealed boiler
Theboilerretrievesits
combustionairfromthe
outsidethendischarges
thefluegassestothe
outside.
Condensing
Retrievesheatfromthe
fluegasses.Watercon-
densatesontheheat
exchanger.
Modulating
Higherorlowerburning
accordingtotheheat
demand.
Stainless Steel
Supersolidkindofsteel
whichkeepsitsquality
forlife.Itwillnotrust
orerodeincontrastto
compositionmaterials,
likealuminium.

Installation&ServicinginstructionsATAGA-Series
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5 Mounting the boiler
The room where the boiler will be placed must always be frost free. The boiler casing is
splash water tight (IPX4D) and is suitable to be installed in e.g. a bathroom.
It is NOT necessary to have a purpose provided air vent in the room or internal space in
which the boiler is installed. Neither is it necessary to ventilate a cupboard or compartment
in which the boiler is installed, due to the extremely low surface temperature of the
boiler casing during operation. Therefore the requirements of BS 6798, Clause 12, and
BS5440:2 may be disregarded.
The boiler can be mounted practically to any wall with the suspension bracket and the
enclosed xing equipment. The wall must be at and of sufcient strength in order to be
able to carry the boiler weight with its water content.
Above the boiler there must be at least 250 mm working space in order to be able to t a
coaxial ue system or a twin supply. On the left side of the boiler at least 50 mm and on
the right side 10 mm must be reserved to allow tting or removing of casing. The location
of the boiler can be determined by using the template.
Before hanging up the boiler remove the cover of the boiler rst. The cover is also the
air cabinet and is attached to the rear wall with four quick fasteners (A, B, C and D) (see
gure 1).
Secure the quick fasteners with the screws (A, B, C and D) at the back of the
cover.
Lift the boiler only by the boilers rear wall.
Figure 1
Lifting and carrying precautions:
- Lift only a manageable weight, or ask for help.
- When lifting the boiler, bend the knees, and keep the back straight and feet
apart.
- Do not lift and twist at the same time.
- Lift and carry the boiler close to the body.
- Wear protective clothing and gloves to protect from any sharp edges.

Installation&ServicinginstructionsATAGA-Series
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5.1 Dimensions
dimensions (inmm)    Figure2
connectiondiameters   table2
60
wall
ceiling
minimal 250mm
minimal 10 mm
Top view
Front viewLeft side view
Bottom view
A
203C
A
325C
A
325EC
X
A200S
A
320S
Flue gas / Air intake A/B mm 60/100 60/100 60/100 60/100 60/100
Gas connection ½" int. ½" int. ½" int. ½" int. ½" int.
CH Flow connection mm 22 22 22 22 22
CH Return connection mm 22 22 22 22 22
Condensate drain connection mm 22 22 22 22 22
Cold water connection mm 15 15 15 n.a. n.a.
DHW connection mm 15 15 15 n.a. n.a.
A
TAG A-Series
Combi Solo

Installation&ServicinginstructionsATAGA-Series
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6 Connecting the boiler
The boiler has the following connection pipes;
- The central heating pipes.
These can be connected to the installation by means of compression ttings / adapter
ttings;
- The gas pipe.
It is provided with a female thread into which the tail piece of the gas valve can be
screwed;
- The condensation drain pipe.
It consists of a 22mm plastic pipe. The drain pipe can be connected to this by means
of an open connection. If the open connection is tted in a different location, then the
pipe can be lengthened by means of a 32 mm PVC sleeve;
- The ue gas exhaust system and air supply system.
It consists of a concentric connection 60/100 mm.
- Cold and hot water pipes.
Only Combi boilers: These consist of 15 mm copper pipe and can be connected to
the installation by means of compression ttings / adapter ttings.
It is recommended that isolation valves are tted to all heating and hot water
connections to facilitate ease of future maintenance.
It is advisable to spray-clean all of the boiler’s connecting pipes and/or to spray-
clean/blow-clean the installation before connecting it to the boiler.
6.1 Central heating system
Connect the central heating system according to the current regulations.
The boiler pipes can be connected to the installation by means of compression ttings.
For connecting to thick-walled pipe (welded or tted), adapters should be used.
When removing the plastic sealing caps from the pipes, contaminated testing
water may be released.
The boiler has a self-adjusting and self-protecting control system for the load. This
involves checking the temperature difference between the supply and return water.
Table 3 shows the water displacement a circulation pump can deliver for a particular
installation resistance.
Boiler
type l/min l/h kPa mba
r
A203
C
UP 15-50 13 790 28 280
A325
C
UP 15-60 18 1090 20 200
A325EC
X
UP 15-60 18 1090 20 200
A200
S
UP 15-50 13 790 28 280
A320
S
UP 15-60 18 1090 20 200
Water flow rate at

T
20°C
Permissible installation
resistancePump type
Installationresistance table3

Installation&ServicinginstructionsATAGA-Series
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If the installation resistance is higher than the value stated, the control system will adjust
the load until a temperature difference between supply and return water is reached that
is acceptable for the control system.
When the temperature difference still remains too high the boiler will switch itself off
and wait until the high temperature differential between the ow and return water has
decreased again.
The control system will, if an unacceptable temperature difference is detected, repeatedly
try to establish a water ow. If this does not succeed, the boiler will block itself (c1 54).
If all, or a substantial part of the radiators have thermostatic radiator valves, an automatic
by-pass valve should be used to prevent ow rate problems. The automatic by-pass valve
used should have the same diameter as the connecting diameter of the supply and return
pipe of the boiler. See also chapter 5.1.
The boiler is NOT equipped with a built-in internal lter.
Advice: ATAG Heating UK Ltd recommend the installation of an in-line lter
installed into the heating return as close to the boiler as possible. ATAG Heating
UK Ltd recommend the use of either:
Adey Magnaclean lters
or
Fernox TF1.
The boiler is not suitable for installations that are equipped with “open”
expansion tanks.
Additives in the installation water are only permitted in consultation with the
country distributor. ATAG Heating UK Ltd recommend the use of either Fernox
or Sentinel products.

Installation&ServicinginstructionsATAGA-Series
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6.2 Expansion vessel
The boiler is equiped with a built-in expansion vessel.
The A203C and A200S have a capacity of 8 litres with a pre-pressure charge 0.8 bar,
whilst the A325C, A325ECX and A320S have a capacity of 12 litres with a pre-pressure
charge of 1 bar. If the expansion vessel size is insufcient for the CH system, an additional
expansion must be installed. The additional expansion vessel should, together with
the built-in expansion vessel, be sized to the water content of the installation. The pre-
pressure charge depends on the height of the installation above the installed expansion
vessel. See Table 4.
The expansion vessel should be connected as closely as possible in the return
near the boiler.
expansion vessel table 4
installation height above
the expansion vessel
pre-charge pressure
of the expansion vessel
5 m 0,5 bar
10 m 1,0 bar
15 m 1,5 bar

Installation&ServicinginstructionsATAGA-Series
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6.3 Heating systems with plastic pipes
When connecting or using an underoor heating system, designed with plastic pipes, or
plastic pipes are used elsewhere in the installation,one should ensure that the plastic
pipes used comply with the DIN 4726/4729 standard. It is set out in this standard that the
pipes may not have oxygen permeability higher than 0.1 g/m³.d at 40°C. If the system
does not comply with this DIN standard, the underoor heating component will have to
be separated from the central heating appliance by means of a plate exchanger.
No recourse can be made to the terms of the warranty in the event of failure to
observe the regulations pertaining to plastic underoor heating pipes.
6.4 Gas connection
The appliance pipe is tted with an internal thread, into which the tail piece of the gas
tap can be screwed.
United Kingdom:
The gas supply must comply to the current Gas Safety, Installation & Use Regulations.
Ireland:
- Irish standard 813
- Domestic gas installations
The connection to the appliance must include a suitable method of disconnection and a
gas control cock must be installed adjacent to the appliance for isolation purposes. The
nominal inlet working gas pressure measured at the appliance should be 20 mbar for Nat
gas (G20).
Make sure that the gas pipe work does not contain dirt, particularly with new
pipes.
When the boiler has to be converted from natural gas to LPG, ATAG provides special
kits for this purpose. Special instructions are supplied with the kit.
Always check the installation of all of the parts through which gas ows (using
leak-search spray)
LPG

Installation&ServicinginstructionsATAGA-Series
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6.5 Hot water supply (DHW Combi boilers)
Connection of the drinking water installation should be done according to the national
water laws.
The ATAG A Combi boilers are tted with a stainless steel plate heat exchanger for
producing domestic hot water. The boiler does not have a hot water store and in case of
a demand for hot water the boiler will heat the domestic water owing through the plate
heat exchanger up to 60°C instantaneous.
The water mains installation must comply with the British water regulations.
In regions with a water hardness value higher than 267ppm (2,67 mmol/l),
calcium deposits should be removed from the plate heat exchanger on a regular
basis. If problems occur when using sanitary water with a chlorine content
higher than 150 mg/l, no recourse can be made to the terms of the warranty.
In order to prevent calcication ATAG recommends applying a water softener.
ATAG recommends the use of for instance AlphaPhos for cleaning plates exchangers.
The hardness of the water is variable in Great Brittain and Ireland. The water company
can provide exact information about this.
The domestic water pipes can be connected to the installation by means of compression
ttings / adapter ttings. The cold water inlet on the Combi boilers must be provided
with the following (counted in the water ow direction):
- Dosing valve (supplied),
- Safety group,
- Expansion vessel 6bar (potable water, blue).
In the cold water pipe in the boiler a dosing valve (supplied loose) can be installed if
required. The dosing valve ensures that a quantity of water supplied has a guaranteed
temperature of 60 °C (assuming a cold water temperature of 10°C). The amount of water
is virtually unaffected by the water pressure.
After installation, check the hot water ow rate with a fully opened hot water tap,
If required the dosing valve can be tted as follows:
- Turn off the mains water supply to the boiler
- Open a hot water tap to depressurise the hot water pipe
- Remove the boilers front cover
- Undo with a closed wrench or size 15 ring spanner the dosing valve plug tting
- Insert the dosing valve according gure 3. O-ring should point downwards
- Ret the plug tting
- Turn on mains water inlet and purge water through all taps
- Replace the boilers front cover.
Dosing valve
Figure 3

Installation&ServicinginstructionsATAGA-Series
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6.6 Condensation drain pipe
ATAG Condensing boilers have the top SEDBUK band A Classication for high energy
efciency in heating and domestic hot water.
All ATAG wall hung gas red condensing boilers contain a syphonic condensate trap to
collect and realease condensate.
The amount of condensate formed is determind by the type of boilers and the water
temperature produced by the boiler.
Condensate pipework.
Use plastic pipework of a diameter no less then 25mm.
Routing of the pipework,
Wherever possible, the condensate pipework should be routed internally to prevent
freezing.
The condensate pipework must fall at least 50mm per metre towards the outlet and take
the shortest possible route
Support the pipe at least every 50 cm for near horizontal sections and 1 metre for vertical
sections
External pipework
The pipework should be kept to a minimum and the route as vertical as possible.
Do not exceed 3 metres outside the dwelling.
The condensate pipe must be run using suitable corrosion resistant materials (eg. plastic).
Terminate as close to the ground or drain as possible (below the grating and above the
water level) while still allowing for safe dispersal of the condensate.
Connection of a condensate drainage pipe to a drain may be subject to local building
controls.
Pipework subjected to extreme cold or wind chill conditions should be in a 40mm diameter
pipe.
Protect all external pipework with weather resistant insulation and, if necessary, box in,
to reduce the risk of freezing.
Making it safe.
Condensate pipework must not leak, freeze or block up.
Condensate traps must be lled before ring the boiler to prevent the possibility of potential
harmfull ue products evacuating via the condensate route.
Do not dispose condensate into a water recovery system where it is recaimed for reuse.
Condensate can be discharged into a rainwater hopper which is part of a sewer carrying
both rain water and foul water.

Installation&ServicinginstructionsATAGA-Series
15
Final discharge options.
The condensate pipe can only terminate into any one of the ve areas as shown in the
diagrams on this page.
Draining of the condensation water to the external rain guttering is not
permitted in view of the danger of freezing.
Before putting the boiler into operation ll the syphon with 300 ml of
water.
A -Condensate from boiler syphon/trap
B -Sink with internal overow
C -25mm dia. Plastic condensate pipe
D -External drain or gully
E -Internal soil and vent stack.
F -Servicable condensate trap (75mm min.)
G -300mm x 100mm dia. sealed plastic tube.
H -Ground level
J -Drainage holes facing away from the building
K -Lime stone chippings
L -Weather resistant insulation
Drain requirements gure 4

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6.7 Flue gas exhaust system and air supply system
The ue gas exhaust system and air supply system consists of:
- Flue gas pipe;
- Air supply pipe;
- Roof or wall terminal.
The ue gas exhaust system and air supply system must comply with:
United Kingdom:
The ue gas outlet and air supply installation must comply with the current regulation
requirements. IG UP 10 and BS 715.
Ireland:
- Irish standard is 813 section 9.10.1
The ATAG A boilers as described in this manual are pre tted with a ue non-
return valve. Always contact ATAG if you want to use the boiler together with a
conbined ue system. Permittance upfront from ATAG is required otherwise no
recourse can be made.
Open boiler
Room sealed system
SS
PP
SS
PP
PP
SS
PP
Openboilerandroomsealedsystem figure5
PP
PP/MW PP/MW PP/MW
Allfluegasparts,whichareoutsidethefire
resistantcover,needtobeinstainlesssteel.
Boiler Class C
Permitted only
when the air
intake and the ue gas
outlet are in the same
pressure area.
BoilerClassB
 Freeexhaustarea
Air lter

Installation&ServicinginstructionsATAGA-Series
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The appliance concentric connection diameter is 60/100 mm, to which the ue gas
outlet and air supply system can be tted, with or without elbow pieces. The maximum
permissible pipe length is set out in Table 5.
Boiler conversion from concentric to parallel
It is also possible to use a parallel pipe connection of 2x 80mm. In this case a conversion
kit 'concentric tot parallel' should be ordered. Art.nr. S4440520.
A. 1. Push the 2 clips slightly outwards.
B. 2. Pull the concentric adaptor out of the boiler.
3. Press the cover in the connection at the back from inside out.
C. 4. Pull the rubber seal around the bottom of the ue connector.
5. Push the ue connector in the boiler, in the boiler ue pipe until
‘CLICK’.
6. Push the ø125mm cover over the ue connector in the ø125mm
opening until ‘CLICK’.
7. Push the rubber plug in open position in the O2 measuring opening and
close the stop.
8. Push the gasket around the top of the ue connector.
D. Connect the parallel ue gas and air intake system (2x ø80mm).
A
1
B
2
3
C
4
7
5
6
8
D
boiler conversion from
concentric to parallel
gure 6

Installation&ServicinginstructionsATAGA-Series
18
We suggest you design a simple ue gas system and air supply system using table 6.
For further information about the available components of the ue gas and air supply
system we recommend you consult the Monopass Flue system literature.
The ATAG ue gas system is meant, and designed, solely for the use on ATAG central
heating boilers adjusted to Nat gas or LPG. The maximum ue gas temperatures are
below 70°C (full load 80/60°C)
The proper operation may be adversely inuenced by changes of or adjustments to the
correct set up.
Possible warranty claims will not be honoured if incorrect changes result in non compliance
with the installation manual or local rules and regulations.
The ue gas systems described in this document are solely suited for ATAG central
heating boilers of the ATAG boiler range. For this purpose the CE Certicate has been
supplemented under the Gastec nr: 0063BR3405, 0063BQ3021, 0063AS3538 and
0063AU3110.
The ue gas system should be built up using only ATAG program products. Combinations
with other brands or systems are, without written permission from ATAG Heating, not
permitted.
The terminal should be located where dispersal of combustion products is not unimpeded
and with due regard for the damage or discolouration that might occur to parts of the
building in the vicinity (see g 7).
terminal position for fan assisted boiler minimum
distance
Adirectly below an open window or other opening
(e.g. air brick) mm 300
B below gutters, soil pipes or drain pipes mm 75
C below eaves mm 200
D below balconies or car port roof mm 200
E from vertical drain pipes and soil pipes mm 75
F from internal or external corners mm 300
G above ground or below balcony level mm 300
H from a surface facing a terminal mm 600
Ifrom a terminal facing a terminal mm 1200
Jfrom an opening in the car port (e.g. door
window) into dwelling mm 1200
K vertically from a terminal on the same wall mm 1500
L horizontally from a terminal on the same wall mm 300
M horizontally from a vertical terminal to a wall mm 300
Dimensions  table6
figure7
In certain weather conditions condensation may also accumulate on the outside of the
air inlet pipe. Such conditions must be considered and where necessary insulation of
the inlet pipe may be required.
In cold and/or humid weather water vapour may condense on leaving the ue terminal.
The effect of such ‘plumeing’ must be considered.
The terminal must not be located in a place where it is likely to cause a nuisance.
For protection of combustibles, refer to IS 813 section 9.10.1. where the terminal is less
than 2m (6.6ft) above a pavement or platform to which people have access (including)
any balcony or at roof. The terminal must be protected by a guard of durable material.
A suitable guard is available from the country distributor.
Where a terminal is tted below a window which is hinged at the top, and where
the hinge axis is horizontal, and the window opens outwards, the terminal shall
be 1m below the bottom of the window opening.
If the boiler is to be located under stairs, a smoke alarm meeting the
requirements of I.S. 409 or equivalent must be tted.

Installation&ServicinginstructionsATAGA-Series
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The ue must be terminated in a place not likely to cause a nuisance.
For horizontal sections, the outlet system should always be tted on an incline (50 mm/m)
sloping down towards the appliance so that no condensation water is able to accumulate
in the outlet system. The chances of icicles forming on the roof outlet is minimised
by causing the condensation water to run back towards the appliance. In the case of
horizontal outlets the inlet system should be tted on an incline sloping down towards
the outside to prevent rainwater from coming in.
The appliance produces a white wisp of condensation (plumeing). This wisp of
condensation is harmless, but can be unattractive, particularly in the case of outlets in
outside walls.
At this time there are 2 different ways of connecting the ue gas/air intake system. The
ue gas duct for the 60/100, 80/125 and 100/150 are push t connections, see gure 10.
The air intake for the 60/100 is a clamp ring connection.
These two types are not interchangeable.
Cutting the pipe goes as follows:
- Take out the inner tube by turning it until it releases from its security position;
- Cut just as much from the air intake part as from the ue gas part;
- Take off the burrs from the cutting edge to prevent cutting the seals;
- Click the pipes back together again.
Use special grease to simplify the tting
When mounting the ue gas system, pay attention to the ow direction. An arrow on the
product points this out. It is not permitted to mount a system upside down and will lead
to complaints.
Dismantlement and shorten pipes figure 8
6.7.1 Dimensioning of the ue gas and air intake duct
The ue diameter is determined by the total length of the run, including for the connection
pipe, elbows ttings and terminal covers etc and the type and number of boilers installed
into the system.
An undersized ue pipe can lead to disorders. Look at table 1 for the choice of the
system and the correct diameter. The table below shows the maximum ue lengths with
the different boiler outputs. A longer ue gas length can be achieved by increasing the
diameter to ø 100mm.
Explanation table 1:
Two pipe ue gas system: maximum noted length = distance between boiler and
terminal A
Concentric ue gas system: maximum noted length = distance between boiler and
terminal B
When using bends the noted value behind every bend should be deducted from the
maximum straight length.
Example:
An A203C with a
concentric ue gas system
ø60/100mm has according
to the table a maximum ue
straight length of 6m In the
system that is going to be put
in there are 2 x 45° bends, so
the maximum ue gas length
is
6 – ( 2 x -1 ) = 4 meters.

Installation&ServicinginstructionsATAGA-Series
20
ø80mm A in m
A200S Maximum straight length 80 35,5
A203C 87° bend resistance length -1,5
45° bend resistance length -0,8
A320S Maximum straight length 80 24
A325C 87° bend resistance length -1,5
A325EC
X
45° bend resistance length -0,8
ø80/125mm B in m
A200S Maximum straight length 80/125 30
A203C 87° bend resistance length -2,8
45° bend resistance length -1,1
A320S Maximum straight length 80/125 18
A325C 87° bend resistance length -2,8
A325EC
X
45° bend resistance length -1,1
ø60/100mm B in m Correction factor fan speed Seechapter 'Settings' Par. 683
A200S Maximum straight length 60/100 15 Correction factor 15 meter 6
A203C 87° bend resistance length -1,6 Correction factor 12 meter 4
45° bend resistance length -1 Correction factor 10 meter 3
Correction factor 8 meter 2
Correction factor 6 meter 1
Correction factor 4 mete
r
0
A320S Maximum straight length 60/100 15 Correction factor 15 meter 12
A325C 87° bend resistance length -1,6 Correction factor 12 meter 9
45° bend resistance length -1 Correction factor 10 mete
r
7
Correction factor 8 meter 5
Correction factor 6 meter 4
Correction factor 4 mete
r
2
A325ECX Maximum straight length 60/100 15 Correction factor 15 meter 9
87° bend resistance length -1,6 Correction factor 12 meter 7
45° bend resistance length -1 Correction factor 10 meter 5
Correction factor 8 meter 4
Correction factor 6 meter 2
Correction factor 4 mete
r
0
Concentric fluesystem ø80/125mm
Two pipefluesystem +chimney lining ø80mm
Concentric fluesystem ø60/100mm
Dimensionsfluegassystemandairsupplysystem    Table5
NOTE! ADJUSTED PARAMETER SETTING FOR FAN SPEED
- See Installation instructions for more details -
Correction factor fan speed (parameter 683) ......................
Adjusted by ..........................................................................
Date ..........................................................................
Examplecorrectionfactorsticker
When using a
concentric ue system
ø60/100mm with a
maximum length
between 4 and 15
meters a correction
must be made to the
fan speed by adjusting
Parameter 683
according to the table.
Fill out the correction
factor on the sticker
below the control
panel.
See chapter 'Settings'
how to adjust a
parameter setting.