Atag iR 12 Release note

8G.51.81.00 / 03.15 Changes reserved. E.& O. E.
Installation & Servicing
Instructions
These instructions are to be retained by the user.
iR 12
iR 15
iR 18
iR 24
iR 32
iR 40
Natural Gas Boilers
Boiler G.C No
iR 12 47-310-30
iR 15 47-310-32
iR 18 47-310-34
iR 24 47-310-36
iR 32 47-310-38
iR 40 47-310-40
Propane Gas Boilers
Boiler G.C No
iR 12 LPG 47-310-31
iR 15 LPG 47-310-33
iR 18 LPG 47-310-35
iR 24 LPG 47-310-37
iR 32 LPG 47-310-39
iR 40 LPG 47-310-41
CE PIN 0063CQ3634
Open Vent System

Installation & Servicing instructions ATAG iR-Range
2
%
bar
°C
+
--
+
reset
eco (OK)
(ESC)
Explanation of the Control Panel & Buttons
Error Error indication (accompanied with a code).
Alert Service-mode or blocking
Flame Visible when boiler is active for heating or DHW
Heating Visible when heating program is active
Flashing when there is a heat demand for heating
Central heating program (On = +, Off = -)
Setting of boiler temperature (max. ow temperature)
+/-function (ancillary function: OK and Escape)
Press 6 seconds for Information
Reset button
DHW button
+/-function (ancillary function: Scroll and +/-function)
Commissioning function (Press both + buttons for 6 seconds)
See chapter 12 for more information about button functions and read-out.
-
+
eco
reset
+
--
+
+
-

Installation & Servicing instructions ATAG iR-Range 3
Work on the installation should only be carried out by qualied personnel with calibrated equipment
and appropriate tools.
Contents
1 Introduction ....................................................................................................................................4
2 Rules & Regulations (Symbols) .....................................................................................................5
3 Technicalspecications..................................................................................................................7
4 Dimensions ...................................................................................................................................8
5 Delivery package............................................................................................................................9
6 Boiler description............................................................................................................................9
7 Boiler photo components list........................................................................................................10
8 Mounting boiler frame ..................................................................................................................11
8.1 Wall frame.........................................................................................................................12
9 Connecting boiler.........................................................................................................................13
9.1 Open vent heating system................................................................................................13
9.2 Water quality.....................................................................................................................14
9.3 Heating systems with plastic pipes...................................................................................15
9.4 Gas connection in general................................................................................................16
9.4.1 Natural gas connection (NG) ............................................................................................16
9.4.2 Propane gas connection (LPG).........................................................................................16
9.5 Condensation drain pipe...................................................................................................18
9.6 Flue gas exhaust system..................................................................................................22
9.6.1 Flue terminal locations......................................................................................................23
 9.6.2 Dimensioningoftheuegasandairintakeduct ............................................................26
9.7 Fitting the boiler onto the boiler frame .............................................................................28
10 Electrical connection....................................................................................................................30
10.1 Electrical diagram .............................................................................................................31
11 Filling system ...............................................................................................................................32
12 Boiler controls ..............................................................................................................................32
12.1 Controls and explanation of the functions.........................................................................33
13 Commissioning the boiler.............................................................................................................34
13.1 Settings.............................................................................................................................36
13.2 Parameter chapter............................................................................................................36
14 Isolating the boiler.......................................................................................................................37
15 Commissioning.............................................................................................................................38
15.1 Checking the CO2.............................................................................................................39
16 Routine servicing..........................................................................................................................41
16.1 Component replacement...................................................................................................45
16.2 User's instructions.............................................................................................................45
16.3 Maintenance frequency.....................................................................................................45
16.4 Warranty............................................................................................................................45
17 Errorcodesandfaultnding .......................................................................................................46
Annex A System water additives.....................................................................................................47
Annex B Declaration of conformity..................................................................................................48
Annex C Short parts list...................................................................................................................49

Installation & Servicing instructions ATAG iR-Range
4
1 Introduction
These instructions describe the functioning, installation, use and primary maintenance of ATAG central heating
boilers for the United Kingdom.
These instructions are intended for the use of Gas Safe registed 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 warranty 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 53 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.

Installation & Servicing instructions ATAG iR-Range 5
2 Rules & Regulations (Symbols)
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.
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.
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iR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 iR boiler is a central heating boiler for "open" expansion tank systems (open vent) only. The boiler
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 15 and 16).
- 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 isolation valve
- Shut down the 230V power supply
See chapter 15 and 16 for further instructions.
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 230V power supply,
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 detection spray).

Installation & Servicing instructions ATAG iR-Range
6
The following (safety) symbols may be encountered in these installation instructions and on the boiler
(packaging):
Boiler must be stored away from frost.
Protect packaging and/or contents from damage as a result of insufcient care taken during
transport.
Protect the boiler from weather conditions during transport and storage whilst still in its packaging.
If and how to clamp when using transport trucks with clamp equipment.
If and how to transport when using a rolling jack.
The whole packaging is made of recycled materials and can be recycled again.
Transport and place the boiler in its packaging in this position.
Do not to step on or stand on the package.
An assembly or dismantling must be carried out.
Pay extra attention in connection with a particular operation.
Useful tip or advice

Installation & Servicing instructions ATAG iR-Range 7
3 Technical specications
Boiler type iR 12 iR 15 iR 18 iR 24 iR 32 iR 40
Type heat exchanger iCon1 iCon1 iCon1 iCon1 iCon2 iCon2
Input CH Net kW 10.8 13.5 16.2 21.6 28.8 36.0
Qn Input CH Gross kW 12.0 15.0 18.0 24.0 32.0 40.0
Modulation range CH (capacity 50/30°C) kW 5.0 - 11.8 5.0 - 14.7 5.0 - 17.5 5.0 - 23.2 6.9 - 31.2 6.9 - 38.8
Nox class EN15502-1
O2 (at full load) %
CO2 (at full load) %
Temperature class flue
Appliance type
Flue gas temp. CH (80/60°C on full load) °C
Flue gas temp. CH (50/30°C on low load) °C
Categories
Electr. power consumption max. W 20 23 28 36 40 46
Electr. power consumption part load W 15 17 21 27 30 35
Electr. power consumption stand by W
Current V/Hz
Degree of protection acc. EN 60529
Weight boiler + jig (empty) kg 32 32 32 32 35 35
Width mm 440 440 440 440 440 440
Height (excl. flue) mm 700 700 700 700 700 700
Depth mm 355 355 355 355 355 355
Overrun time pump CH sec
Flow temperature max. °C
SAP Annual Efficiency NG 89.7 89.7 89.7 89.7 89.8 89.7
CE product identification number(PIN)
Technical specifications Propane gas
Boiler type iR 12 iR 15 iR 18 iR 24 iR 32 iR 40
Heat exchanger type iCon1 iCon1 iCon1 iCon2 iCon2 iCon2
O2 (at full load) %
CO2 (at full load) %
Pre pressure mbar
Input CH Net kW 10.8 13.5 16.2 21.6 28.8 36.0
Output (80/60°C) kW 10.7 13.3 15.9 21.2 28.4 35.4
Output (50/30°C) kW 11.8 14.7 17.5 23.2 31.2 38.8
Weight boiler + jig (empty) kg 32 32 32 35 35 35
10.3
see data plate LPG
5.1
0063CQ3634
85
60
230/50
IPX4D (B22/B33 IPX0D)
II2H3P
4
59
29 30
59
Technical specifications Natural gas
ATAG iR-Series
T100
B23, B33, C13, C33, C43, C53, C63, C83, C93
4.7
9.0
Regular
5

Installation & Servicing instructions ATAG iR-Range
8
iR 12 iR 15 iR 18 iR 24 iR 32 iR 40
Flue gas / Air intake A/B mm
Gas connection mm
CH Flow connection mm
CH Return connection mm
Condensate drain connection mm 21.5
22
22
60/100
22
ATAG iR-Series
Regular
4 Dimensions
CH Flow CH Return Gas
700 150
850
220225
60
220
380
440
137
343
A
B
B

Installation & Servicing instructions ATAG iR-Range 9
5 Delivery package
The delivery package of the boiler is composed as follows:
- Boiler frame;
- Boiler with cover;
- Automatic air vent (in boiler);
- Isolation valves with drainpoint (CH 2x)
- Gas isolating valve;
- Fittings consisting of plugs and screws;
- Drawing template;
- Installation instructions;
- User manual;
- Warranty Card.
The following components are not present in the boiler packaging as a standard and should be included in
the installation according to the requirements:
- Flue system;
- External controls.
6 Boiler description
The ATAG iR is a room sealed, condensing and modulating CH boiler for "open" expansion tank systems
(open vent) only.
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 gas to supply heat (natural gas and LPG versions available). 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 siphon. This feature requires a
condensate drain pipe connected to the drain of the building.
The boiler is equipped with an intelligent control system. The boiler anticipates on 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.
TheboilerhasbeentestedaccordingtovalidCEstandardsandhasaCEcerticateand>88%Efcient
SEDBUK 2009.
Statement: No banned materials including asbestos, mercury, CFC's have or will not be included in
the product.

Installation & Servicing instructions ATAG iR-Range
10
7 Boiler photo components list
1 Heat exchanger
2 Ignition unit
3 Fan unit
4 Air supply damper
5 Gas valve
6 Automatic de-aerator
7 Control unit
8 Control panel
9 Flue gas exhaust
10 Combustion air supply
11 Boiler data plate
12 Siphon
13 IsolationvalveowCH
14 Isolation valve gas
15 Isolation valve return CH
ATAG iR Figure 7.a
T1 Flow sensor
T2 Return sensor
F1 Flow switch
G Gas pipe
A Flow pipe CH
R Return pipe CH
C Condensation pipe
T2
4
21
5
7
CG R
11
3
10
9
6
8
A
13 14 15
T1
F1
12

Installation & Servicing instructions ATAG iR-Range 11
8 Mounting boiler frame
Install the boiler in a boiler room in accordance to the actual local regulations BS5440-2:2000.
The installation location of the boiler has to be, and remain, 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wallframe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175mmworkingspaceinordertobeabletotahorizontal
concentricuesystemtotherear(Seechapter9.6formoreueoptions).Makesurethereissufcient
servicespacearroundtheboileraccordinggure8.a.Thelocationoftheboilercanbedeterminedbyusing
the template.
Thewallframeallowsthepossibitytopre-tthecompleteheatingsystembeforettingtheboiler.Alsothe
uesystemcanbeprepared.Finallyttingoftheuesystemisdoneafterttingtheboiler.Seenextpagefor
alloptionsforconnectiontheheating,condensate,ueandgasinstallation.
Beforehangingtheboilertotheboilerframeremovethefrontpaneloftheboilerrst.Thefrontpanelisalso
theaircabinetandisattachedtotheboilercasewith2fasteners(AandB)(seegure8.a).
Note that there is an earth cable to disconnect when removing the boiler front panel. Free space for
removing the connector is about 400 mm. Remember to connect this earth cable when placing back
the boiler front panel and take care the wire does not get stuck between front panel and boiler.
Seechapter9.8forfurtherproceduretottheboilerontotheboilerframe.
Service dimensions (in mm) Figure 8.a
100
2.5 2.5
400
Service space
Service space
175
Bayonet catch
A
B

Installation & Servicing instructions ATAG iR-Range
12
8.1 Wall frame
- Position the boiler frame against the wall using the template and a level.
- Usethelevelforhorizontalpositioningandcheckingtheverticalposition.
- Drill 4x ø10mm holes, 60mm deep
- Press the nylon wall plug (ø10x55mm) in the holes
- Mount the boiler frame to wall with the 4 coach screws (ø8x60mm) using a 13mm wrench
The boiler frame allows pipe work to be installed behind the boiler.
The pipe work must be installed at least 10mm inside the front of the frame.
ATAG i-Serie template and boiler frame Figure 8.1.a

Installation & Servicing instructions ATAG iR-Range 13
9 Connecting boiler
The boiler has the following connection pipes;
- The central heating pipes.
The boiler is provided with isolation valves on the ow and return pipe to which the installation can be
connected by means of 22mm compression ttings;
- The gas pipe.
The boiler is provided with an isolation gas valve to which the gas line can be tted with 22mm
compression tting;
- The condensation drain pipe.
It consists of a 25mm exible plastic pipe. The drain pipe can be connected to this by means of an open
connection;
- Theuegasexhaustsystemandairsupplysystem.
It consists of a concentric connection 60/100 mm.
See following chapters for detailed information regarding each connection.
It is advisable to clean all of the boiler’s connecting pipes and/or to power ush the installation
before connecting it to the boiler.
9.1 Open vent heating system
This boiler is only suitable for installations that have been equipped with “open” expansion tanks
(open vent).
Connect the central heating system according to the current regulations.
450 mm
Min. height
1000 mm
Min.
150 mm Max.
Heating
circuit
DHW
cylinder
Boiler
22 mm (Min.) vent feed and
expansion cistern
15 mm (Min.) cold feed
Pump
22 mm (Min.)
Automatic by-pass
Open vent heating system
Recommended relationship
between pump, cold feet and vent.
Scheme open vent system Figure 9.1.a

Installation & Servicing instructions ATAG iR-Range
14
Theboilerpipescanbeconnectedtotheinstallationbymeansof22mmcompressionttings.Forconnecting
tothick-walledpipe(weldedortted),adaptersshouldbeused.
The boiler is NOT equipped with a built-in internal lter.
Advice: ATAG Heating Technology Ltd recommend the installation of an in-line lter installed into the
heating return as close to the boiler as possible. ATAG Heating Technology Ltd recommend the use
of the:
ATAG iGuard Magnatic Filter FC000100 (5 year warranty)
Additives in the installation water are only permitted in consultation with the country distributor. See
chapter 9.2 for detailed information.
9.2 Water quality
Fill the installation with mains cold water.
Inmostcases,aheatingsystemcanbelledwithwateraccordingtonationalstandardsforwaterand
treatment of this water is not necessary.
InordertoavoidproblemswiththeCH-installations,thequalityofthellingwaterhastomeetthe
specicationsmentionedintable9.2.a:
Ifthellingwaterdoesnotmeettherequiredspecications,youareadvisedtotreatthewatertosuchan
extentthatitdoesmeettherequiredspecications.
The warranty becomes invalid, if the installation is not being ushed and/or the quality of the lling
water does not meet the specications recommended by ATAG Heating Technology Ltd. Always
contact ATAG Heating Technology Ltd in advance, if things are not clear or you wish to discuss any
deviations. Without approval, the warranty becomes invalid.
Installation:
- Theuseofgroundwater,demi-wateranddistilledwaterisprohibited.(onthenextpageyouwillndan
explanationofthesedenitions)
- Ifthemainswaterqualitymeetsthespecicationsmentionedintable9.3.a,youcanstartushingthe
installation before installing the device.
- Whilstushing,corrosionproducts(magnetite),ttingproducts,cuttingoilandotherundesirableproducts
have to be removed.
- Anotherpossibilityistoremovethepollutionbyinstallingalter.Theltertypehastotthetypeand
grainsizeofthepollution.ATAGHeatingTechnologyLtdrecommendslterusage.
- In this case, the whole piping system should be taken into consideration.
- The CH-installation has to be properly vented before using the system. For that purpose, we refer to the
commissioning chapter.
- Ifaregularwatertopupisrequired(>5%onanannualbasis),thenthereisastructuralproblemand
an installer has to solve the problem. Regularly adding fresh water to the system also adds additional
calcium and oxygen implying that magnetite and calcium residues can continue. The result may be
blockages and/or leakages.
- Theuseofanti-freezeandotheradditivesrequiresperiodicalqualitychecksofthellingwaterin
accordance with the period laid down by the additives supplier.
- Chemical additions are to be avoided and should only be used after ATAG Heating Technology Ltd has
approved their corresponding use.
- Should you wish to achieve the required water quality by using chemical additives, then this is your own
responsibility. The warranty on the product delivered by ATAG Heating Technology Ltd expires, if the
waterqualitydoesnotmeetATAGHeatingTechnology'sspecicationsorthechemicaladditiveshavenot
been approved by ATAG Heating Technology Ltd.
- On installation and during additions or changes at a later stage, ATAG Heating Technology Ltd
recommends to keep a record of the type of water used, its quality at the time, and if applicable, which
additives and quantities were added.

Installation & Servicing instructions ATAG iR-Range 15
Parameter Value
Water type Potable water
Softened water
pH 6.0-8.5
Conductivity (at 20°C in µS/cm) Max. 2500
Iron (ppm) Max. 0.2
Hardness (°dH / ppm): Installation volume/capacity
<20 l/kW 1-12 °dH / 17-214 ppm
Installation volume/capacity
>=20l/kW
1-7 °dH / 17-125 ppm
Oxygen No oxygen diffusion allowed during operation.
Max.5%llingwateradditionannually
Corrosion inhibitors Refer to Additives Attachment
pH increasing or lowering agents Refer to Additives Attachment
Anti-freezeadditives Refer to Additives Attachment
Other chemical additives Refer to Additives Attachment
Solid substances Not allowed
Residues of processing water not forming part of the
drinking water Not allowed
table 9.2.a
Water type denition:
Potable water: Tap water compliant with the European drinking water guideline:
98/83/EG dated 3 November 1998.
Softened water: Water with partly de-ionised calcium and magnesium.
Demi-water: Virtually completely demineralised water (very low conductivity)
Distilled water: Water no longer containing minerals.
9.3 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.

Installation & Servicing instructions ATAG iR-Range
16
9.4 Gas connection in general
The local gas supplier should be consulted, at the installation planning stage, in order to establish the
availability of an adequate supply of gas. An existing service pipe must NOT be used without prior
consultation with the local gas supplier.
ATAG supplies boilers suitable for natural gas only and boilers for LPG only. Verify the identication
plate on the boiler if the boiler is suitable for the gas kind on site. The boilers cannot be converted to
another kind of gas.
Make sure that the gas pipe work does not contain dirt, particularly with new pipes.
The complete installation MUST be tested for gas tightness and purged as described in the above
code.
Theboilerconnectionisprovidedwithanisolationvalvewith22mmcompressiontting,intowhichthegas
linecanbetted.
9.4.1 Natural gas connection (NG)
The gas supply must comply to the current Gas Safety, Installation & Use Regulations, in accordance with
BS.6891.
The nominal inlet working gas pressure measured at the appliance should be 20 mbar for Nat gas (G20).
Allowing for the acceptable pressure loss of 1mbar across the installation pipework, it can be assumed that
a minimum permitted operating pressure of 18mbar will be delivered to the inlet of the appliance. (Reference
BS 6400-1 Clause 6.2 Pressure Absorption). When tested at the gas valve, the pressure drop from the meter
to the gas valve must not be more than 3.8 mbar.
9.4.2 Propane gas connection (LPG)
The LPG installation has to comply with British Standard 813 and Domestic Gas Installations
Installing of a LPG installation should only be done by a registered LPG installer.
The tank must be provided with a high pressure regulator with a minimum capacity of 24 kg/h to reduce
the tank pressure from 5 to 1.5 bar. The 1.5 bar high pressure gas line should have a minimum diameter of
15mm. In the high pressure gas line a house pressure regulator must be installed. When tested at the gas
valve, the pressure drop from the pressure regulator to the gas valve must not be more than 3.7 mbar.

Installation & Servicing instructions ATAG iR-Range 17
9.4.3 House pressure regulator
Each gas appliance which is connected to the propane installation must be provided with its own
house pressure regulator. The house pressure regulator is a third party delivery.
Thehousepressureregulatormusthaveaminimumcapacityof10kg/h/30mbarandaCEcertication.
ATAG advices to install the house pressure regulator as close as possible to the boiler. When placing the
regulator inside, a discharge drain of ø6mm must be installed. The discharge drain must be directed outdoor.
In case of a discharge the gasses will go outside.
Ifttingtheregulatoroutsidetheregulatorshouldbeprotectedagainstinuencesoftheweather.The(de-)
aerationmustbepositioneddownwards(seegure9.5.3.a).
ATAG advices to install measure points on all gas line parts to have the possibility to check for pressure loss.
Pre-pressure must be adjusted to 30 mbar by means of the house pressure regulator. The maximum
permitted closing pressure may be 5 mbar higher than the maximum pre-pressure.
A too high closing pressure in the low pressure gas line can be caused by a high resistance or jam in this gas
line. When the closing pressure keeps increasing the valve in the regulator is not closing correctly. In this
case the regulator should be replaced.
9.4.4 Dimensioning of the low pressure gas line
The gas line from the house pressure regulator to the boiler must have the dimensions according the table
below.
9.4.5 De-aerating the LPG tank
When placing a new or revised LPG tank the tank must alway be de-aerated.
ATAG advices to inform the gas supplier that a central heating boiler is connected to the LPG tank. For the
boiler it is absolutly necessary that the tank is free of air. When not the boiler will give ignition problems and
will not function.
ATAG advices to measure the content of O2.Thisvalueshouldbelowerthan1.3%.Contactthegas
supplier in case of doubt.
Boiler type iR 12 iR 15 iR 18 iR 24 iR 32 iR 40
Diameter gas line mmmmmm
ø15mm 3 -----
ø22mm 30 18 18 18 18 18
ø28mm - 30 30 30 30 30
example propane installation gure 9.4.3.a

Installation & Servicing instructions ATAG iR-Range
18
9.5 Condensation drain pipe
TheATAGcondensingboilerhasthe>88%EfcientSEDBUK2009forhighenergyefciencyinheatingand
domestichotwater.TheATAGwallhunggasredcondensingboilercontainasiphoniccondensatetrapto
collect and realease condensate. The amount of condensate formed is determind by the type of boiler and
the water temperature produced by the boiler.
Condensate pipework.
Use plastic pipework of an internal diameter no less then 19mm ID (typically 22mm OD).
Routing of the pipework,
The condensate pipework must fall at least 45mm per metre away from the boiler, taking the shortest
practicle route to the termination point.
Supportthepipeatleastevery50cmfornearhorizontalsectionsand1metreforverticalsections.
Whereverpossible,thecondensatepipeworkshouldberoutedinternallytopreventfreezing.Inorderto
minimisetheriskoffreezingduringprolongedverycoldspells,oneofthefollowingmethodsofterminating
condensate drainage pipe should be adopted.
Internal pipework
Wherever possible, the condensate drainage pipe should be terminated at a suitable internal foul water
discharge point such as (a) an internal soil and vent stack or (b) an internal kitchen or bathroom waste pipe,
washing machine waste pipe etc. A suitable permanent connection to the foul waste pipe should be used.
Figures 9.5.1, 9.5.2(a), 9.5.2(b) show appropriate connection methods.
Thepossibilityofwastepipesfreezingdownstreamoftheconnectionpointshouldbeconsideredwhen
determining a suitable connection point - e.g. a slightly longer pipe run to an internal soil stack may be
preferable to a shorter run connecting into a kitchen waste pipe discharging directly through the wall to an
external drain.
Where “gravity discharge” to an internal termination is not physically possible (e.g. the discharge point is
above the appliance location, or access is obstructed by a doorway), or where very long internal pipe runs
would be required to reach a suitable discharge point, the following measures may be adopted.
Use of a condensate pump (to an internal termination):
Condensatecanberemovedusingaproprietarycondensatepump(thirdpartydelivery),ofaspecication
recommended by the pump manufacturer.
The pump outlet should discharge to a suitable internal foul water discharge point, such as (a) an internal soil
and vent stack or (b) an internal kitchen or bathroom waste pipe, washing machine waste pipe etc. Figure
9.5.3 shows a typical connection method.
A suitable permanent connection to the foul waste pipe should be used and the manufacturer’s detailed
installation instructions for the pump should be followed.

Installation & Servicing instructions ATAG iR-Range 19
Drain requirements Figure 9.5.2 (b)
1 Boiler
2 Visible air break
3 75mm trap
4 Visible air break and trap is not required because there is a trap
with a condensate seal of 180mm incorporated into the boiler
(minimum requirement is 75mm)
5 Soil and vent stack
6 Invert
7 450mm minimum up to three storeys
8 Minimum internal diameter 19mm (fall at least 45mm per meter)
1 Boiler
2 Visible air break
3 75mm trap
4 Visible air break and trap is not required because there is a trap
with a condensate seal of 180mm incorporated into the boiler
(minimum requirement is 75mm). In this case the 100mm is
measured to the trap in the boiler.
5 Sink, basin, bath or shower
6 Open end of condensate drainage pipe direct into gully 25mm
min below grating but above water level; end cut at 45°
7 Sink lip
8 Minimum internal diameter 19mm (fall at least 45mm per meter)
9 Pipesizetransition
10 Minimum internal diameter 30mm
11 Water/weather proof insulation
Drain requirements Figure 9.5.1 Drain requirements Figure 9.5.2 (a)
Drain requirements Figure 9.5.3
1 Boiler
2 Visible air break at plug-hole
3 75 mm sink, basin, bath or shower waste trap
4 Sink,basin,bathorshowerwithintegraloverow
5 Open end of condensate drainage pipe direct into gully 25mm
min below grating but above water level; end cut at 45°
6 Minimum internal diameter 19mm (fall at least 45mm per meter)
7 Pipesizetransition
8 Minimum internal diameter 30mm
9 Water/weather proof insulation
1 Condensate discharge from boiler
2 Condensate pump
3 Visible air break at plug hole
4 Sinkorbasinwithintegratedoverow
5 75mm sink waste trap

Installation & Servicing instructions ATAG iR-Range
20
External pipework
The use of an externally-run condensate drainage pipe, terminating at a suitable foul water discharge point
or purpose-designed soakaway, may be also be considered; however if this termination method is chosen
then the following measures should be adopted
- The pipe should be run internally as far as possible before going externally and the pipe diameter should
be increased to a minimum of 30mm ID (typically 32mm OD) before it passes through the wall.
- The external run should be kept as short as possible, taking the most direct and “most vertical” route
possibletothedischargepoint,withnohorizontalsectionsinwhichcondensatemightcollect.Donot
exceed 3 metres outside the dwelling.
- The external pipe should be insulated using suitable waterproof and weatherproof insulation (“Class O”
pipe insulation is suitable for this purpose) .
- Theuseofttings,elbowsetcshouldbekepttoaminimumandanyinternal“burrs”oncutpipework
should be removed so that the internal pipe section is as smooth as possible.
The customer/householder should be advised that even with the above measures this type of installation
couldfreeze,andthatifthisweretooccurthenboilershutdowncouldresult,requiringremedialaction-
possibly involving a chargeable engineer call-out.
Where there are likely to be extremes of temperature or wind-chill, the use of a proprietary trace-heating
system for external condensate drainage pipework, incorporating an external frost thermostat, should
therefore be considered. If such a system is used then the installation instructions of the trace heating
manufacturerandanyspecicrecommendationsregardingpipediameter,insulation,etc.shouldbefollowed.
All other relevant guidance on condensate drainage pipe installation should also be followed.
Other cold weather protection methods approved or endorsed by boiler manufacturers and/or service
organisations may be adopted if these are considered suitable by the parties involved.
If an external soil/vent stack is used as the external termination then the connection method shown in Figure
9.5.4 should be used, together with the measures on insulation etc. as described above and shown in the
diagram.
When a rain water downpipe is used as the termination (NB only permissible if this downpipe passes to
a combined foul and rainwater drainage system) an air break must be installed between the condensate
drainagepipeandthedownpipetoavoidreverseowofrainwaterintotheboilershouldthedownpipeitself
becomeoodedorfrozen.Figure9.5.5showsasuitableconnectionmethod.
Where the condensate drainage pipe is terminated over an open foul drain or gully, the pipe should terminate
below the grating level, but above water level, in order to minimise “wind chill” at the open end. Pipe drainage
will be improved if the end is cut at 45° as opposed to a straight cut. The use of a drain cover (such as
those used to prevent blockage by leaves) may offer further protection from wind chill. Figure 9.5.6 shows a
suitable connection method.
Where the condensate drain pipe terminates in a purpose-designed soakaway (see BS 6798:2009 or boiler
installation manual for soakaway design requirements) any above-ground section of condensate drainage
pipe should be run and insulated as described above. Figure 9.5.7 shows a suitable connection method.
Unheated internal areas:
Internal condensate drainage pipes run in unheated areas such as lofts, basements and garages should be
treated as external pipe.
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 siphon with 150 ml of water.