atag iC 24, iC 28, iC 36, iC 40, iC Economiser 27 User guide

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Page 1

Installation & Servicing Instructions

These instructions are to be retained by the user.

Page 2

Explanation of the Control Panel & Buttons

Page 3

1	Introd	uction	4
2	Rules	& Regulations (Symbols)	5
3	Techn	ical specifications	7
4	Dimer	isions	9
5	Delive	ry package	10
6	Boiler	description	10
7	Boiler	photo components list	11
8	Mount	ing boiler frame	12
U U	8 1	Wall frame	13
9	Conne	acting boiler	14
U	9.1	Central heating system	14
	0.1		15
	0.2		15
	9.5	Valer quarky	17
	9.4	Cos connection in general	17
	9.5		17
	9.5.1		17
	9.5.Z	Propane gas connection (LPG)	11
	9.5.3	House pressure regulator	18
	9.5.4	Dimensioning of the low pressure gas line	18
	9.5.5	De-aerating the LPG tank	18
	9.6	Hot water supply	19
	9.7		19
	9.8	Flue gas exhaust system	23
	9.8.1	Flue terminal locations	24
	9.8.2	Dimensioning of the flue gas and air intake duct	27
	9.9	Fitting the boiler onto the boiler frame	29
10	Electri	cal connection	31
	10.1	One controller, OpenTherm and BUS connection	32
	10.2	Room thermostat volt free connection	32
	10.3	ATAG Central Heating volt free timer connection	32
	10.4	ATAG Hot Water volt free timer connection	32
	10.5	DHW sensor connection	32
	10.6	ATAG Outside sensor	32
	10.7	230V Control Block (230V live output)	32
	10.8	230V Control Block (SwL Switched live)	32
	10.9	Electrical diagram	33
11	Fillina	system	34
	11.1	Hot water supply	34
12	Boiler	controls	35
	12 1	Controls and explanation of the functions	36
13	Comm	issioning the holer	37
10	13.1	Settings	39
	13.2	Parameter chanter	30
1/	leolat	ing the boiler	10
15	Comm		11
15	15 1		41
	15.1		42
	15.2		40
40	15.3	CO and combustion checks	40
10	Rouur		48
	10.1		52
	10.2		52
	16.3	User's instructions	52
. –	16.4	warranty	52
17	Error (	codes and fault finding	53

Ann	exA	System water additives	54
Ann	ex B	Declaration of conformity	55
Ann	ex C	Snort parts list	56

Work on the installation should only be carried out by qualified personnel with calibrated equipment and appropriate tools.

Page 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 registered 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 notification.

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 fitted with an identification 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 classification.

On completion of the installation the installer or commissioning engineer must fill out and complete the Benchmark Commissioning Checklist found on page 59 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.

Page 5

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 and Building 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 iC boiler is a certified appliance and must not be modified 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 iC boiler is a central heating boiler with an integrated hot water function. The boiler must be connected according to these instructions and all installation norms in respect of the part of the boiler to be connected.

The appliance is not to be used by children or persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction.

Children being supervised not to play with the appliance.

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
Close the shut off valve of the boiler's cold water supply

See chapter 15 and 16 for further instructions.

Page 6

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 flows (using leak detection spray).

The following (safety) symbols may be encountered in these installation instructions and on the boiler (packaging):

Protect packaging and/or contents from damage as a result of insufficient care taken during

Boiler must be stored away from frost.

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

Page 7

Technical specifications Natural gas

		ATAG iC-Series
					Com	oi
Boiler type		iC 24	iC 28	iC 36	iC 40	iC Economiser 27	iC Economiser 35	iC Economiser 39
Type heat exchanger		iCon1	iCon1	iCon2	iCon2	iCon1	iCon2	iCon2
CE product identification number (PIN)					0063CQ	3634
Country of destination					UK
Q _min input min. CH & DHW (H _i )	kW	4.5	4.5	6.2	6.2	4.5	6.2	6.2
Q _n input nominal CH (H _i )	kW	21.6	21.6	28.8	28.8	21.6	28.8	28.8
Q _r adjusted input CH (H _i )	kW	21.6	21.6	28.8	28.8	21.6	28.8	28.8
Q _min input min. CH & DHW (H _s )	kW	5.0	5.0	6.9	6.9	5.0	6.9	6.9
Q _n input nominal CH (H₅)	kW	24.0	24.0	32.0	32.0	24.0	32.0	32.0
Q _nw input nominal DHW (H _i )	kW	23.9	27.3	35.4	37.9	28.4	36.4	38.3
Q _nw input nominal DHW (H _s )	kW	26.6	30.3	39.3	42.0	31,5	40.4	42,5
P _min output min, CH (50/30°C)	kW	5.0	5.0	6.9	6.9	5.0	6.9	6.9
P _n output nominal CH (50/30°C)	kW	23.2	23.2	31.2	31.2	23.2	31.2	31.2
P _min output min. CH (80/60°C)	kW	4.4	4.4	6.1	6.1	4.4	6.1	6.1
P _n output nominal CH (80/60°C)	kW	21.2	21.2	28.3	28.3	21.2	28.3	28.3
Pww output DHW	kW	23.4	26.8	34.7	37.1	30.1	38.5	40.5
Nox class EN15502-1					6
O ₂ (at full load)	%				4.7
CO ₂ (at full load)	%				9.0
Temperature class flue					T100	)
Appliance type				B23, B33, C1	3, C33, C43	C53, C63, C83	, C93
Max. flue resistance at Qnw/Qn	Pa	130	153	191	143	151	140	148
Flue gas temperature CH (80/60°C full load)	°C				59
Flue gas temperature CH (50/30°C full load)	°C				34
Flue gas mass flow (full load DHW)	g/s	10	11	14	15	11	15	15
Flue gas temperature CH (36/30°C low load)	.	30	30	30	30	30	30	30
Gas categories					11 _2H31	7
Gas pressure 2H / 3P	mbar m2/br	2.52	2 90	2 74	20/3	2.00	2.95	4.05
	V/H z	2.55	2.09	3.74	4.00 ~ 230/	50	5.65	4.05
Degree of protection acc. EN 60529	V/IIZ			IP	230/ 230/ 230/	33 IPX0D)
Overrun time pump CH	sec				60
Overrun time pump DHW	sec				20
P _MS water pressure CH min./max.	bar				0.8 /	3
Flow temperature max.	°C				80
Available pump height CH	kPa	25	25	20	20	25	20	20
P _MW water pressure DHW min./max.	bar				0.5 /	8
DHW temperature setting (T _in =10°C)	°C	60	60	60	60	60	60	60
Threshold DHW	l/min	1.5	1.5	1.5	1.5	1.5	1.5	1.5
DHW flow (T _in =10°C, ΔT=35°C)	l/min	10.1	11.5	14.9	16.2	12.6	16.1	17.0
DHW flow (T _in =10°C, ΔT=50°C)	l/min	6.7	7.7	10.0	10.7	8.6	11.1	11.6
SAP Annual Efficiency NG	%	89.7	89.7	89.7	89.7	89.7	89.7	89.7
Weight boiler + jig (empty)	kg	41	41	44	44	43	46	46
Content DHW part	I	0.3	0.3	0.3	0.3	0.6	0.6	0.6

Technical specifications Propane (3P)

Boiler type		iC 24	iC 28	iC 36	iC 40	IC Economiser 27	IC Economiser 35	IC Economiser 39
Heat exchanger type		iCon2	iCon2	iCon2	iCon2	iCon2	iCon2	iCon2
O ₂ (at full load)	%				5.1
CO ₂ (at full load)	%				10.3
Pre pressure	mbar				see data pla	ite LPG
Input CH DHW (Hi)	kW	21.6 (23.9)	21.6 (27.3)	28.8 (35.4)	28.8 (37.9)	21.6 (28.4)	28.8 (36.4)	28.8 (38.3)
Gas consumption max. G31	kg/h	1.90	2.16	2.80	2.99	2.24	2.88	3.03
Gas consumption max. G31	m ³ /hr	1.00	1.14	1.47	1.58	1.18	1.52	1.59
Output (80/60°C)	kW	8.3 - 21.2	8.3 - 21.2	19.1 - 28.3	19.1 - 28.3	8.3 - 21.2	19.1 - 28.3	19.1 - 28.3
Output (50/30°C)	kW	9.0 - 23.2	9.0 - 23.2	20.8 - 31.2	20.8 - 31.2	9.0 - 23.2	20.8 - 31.2	20.8 - 31.2

Page 8

ErP specifications according to European Guid	eline 2010	)/30/EU
Boiler type		iC 24	iC 28	iC 36	iC 40	iC Economiser 27	iC Economiser 35	iC Economiser 39
Declared load profile DHW	-	XL	XL	XXL	XXL	XXL	XXL	XXL
Seasonal space heating energy efficiency class		А	А	А	A	А	Α	А
Water heating energy efficiency class		А	А	А	А	А	А	А
P _n Power output	kW	21	21	28	28	21	28	28
Q _HE Annual energy consumption	GJ	69	69	104	115	69	104	115
AEC Annual electricity consumption	kWh	49	51	52	52	57	52	52
AFC Annual fuel consumption	GJ	17	17	21	21	20	20	20
η _s Seasonal space heating energy efficiency	%	94	94	94	94	94	94	94
η _WH Water heating energy efficiency	%	85	84	90	90	94	96	96
L _WA Sound power level, indoors	dB	46	46	48	48	46	48	48
P ₄ nominal output (80/60°C)	kW	21.2	21.2	28.3	28.3	21.2	28.3	28.3
P ₁ 30% of nominal output (36/30°C)	kW	7.2	7.2	9.6	9.6	7.2	9.6	9.6
η ₄ efficiency at nominal input (GCV)	%	88.3	88.3	88.6	88.6	88.3	88.6	88.6
η ₁ efficiency at 30% of the nominal heat input (GCV)	%	99.4	99.4	99.6	99.6	99.4	99.6	99.6
el _max	kW	0.074	0.074	0.074	0.074	0.074	0.074	0.074
el _min	kW	0.021	0.021	0.032	0.032	0.021	0.032	0.032
P _SB	kW	0.004	0.004	0.004	0.004	0.004	0.004	0.004
P _stby heat loss	kW	0.055	0.055	0.055	0.055	0.055	0.055	0.055
Q _elec Daily electricity consumption DHW	kWh	0.249	0.249	0.240	0.240	0.264	0.238	0.238
Q _fuel Daily fuel consumption DHW	kWh	22.7	22.96	27.3	27.3	25.6	25.1	25.1
Temperature Control				Weather	rcompensato	r (outside senso	or)
Class of temperature control		\|\|	\|\|	\|\|	\|\|	\|\|	11	11
Contribution of temperature control	%	2	2	2	2	2	2	2
Packago
Seasonal space heating energy efficiency of package	%	96	96	96	96	96	96	96
CH Package Energy Label		А	А	A	А	Α	Α	Α
DHW Package Energy Label		А	А	А	А	А	А	А

Page 9

4 Dimensions

Page 10

Delivery package

The delivery package of the boiler is composed as follows:

Boiler frame
Boiler with cover:
Automatic air vent (in boiler).
Safety valve 3 bar (in boiler);
Three way valve (in boiler):
Automatic by-pass (in boiler)
DHW flow restrictor (in boiler);
Economiser (only economiser-versions)
Expansion vessel 8 litre / 1 bar (in boiler frame);
Isolation valves with drainpoint (CH 2x, 1x DHW cold)
Gas isolating valve:
Filling loop;
Mains cold water filter:
Fittings consisting of plugs and screws:
Outside sensor
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.

Boiler description

The ATAG iC is a room sealed, condensing and modulating CH boiler equipped with an integrated bot water. .vlaque

The boiler is equipped with a compact stainless steel heat exchanger with smooth pipes. It is a well thoughtout principle using sustainable materials.

The boiler burns day to supply heat (natural day 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 flue gases causes condensation. This results in a very high efficiency. 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.

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 flow water temperature. On the basis of this information the control system calculates optimum flow water temperature required for the installation

The boiler has been tested according to valid CE standards and has a CE certificate and >88% Efficient SEDBUK 2009.

Statement: No banned materials including asbestos, mercury, CFC's have or will not be included in /!\ the product.

Page 11

7 Boiler photo components list

TAG iC

1 Heat exchanger

2 Ignition unit
3 Fan unit
4 Air supply damper
5 Gas valve
6 Automatic de-aerator
7 DHW plate heat exchanger
8 Control unit
T1 Flow sensor
T2 Return sensor
T3 Hot water sensor
F1 DHW flow sensor
P1 Water pressure sensor

9 Control panel
10 Three-way valve
11 Circulation pump
12 Filling loop
13 Flue gas exhaust
14 Combustion air supply
15 Boiler data plate
16 Expansion vessel
- Gas pipe
A Flow pipe CH
R Return pipe CH
C Condensation pipe
K Cold water pipe
W Hot water pipe

17 Safety valve
18 DHW Economiser
19 Siphon
20 Isolation valve flow CH
21 Isolation valve gas
22 Isolation valve cold water
23 Isolation valve cold water 23 Isolation valve return CH
24 Flue non return valve

Page 12

Install the boiler in a boiler room in accordance to the actual local regulations BS5440-2:2009.

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 BS5440:2 may be disregarded.

The boiler can be mounted practically to any wall with the wall frame and the enclosed fixing equipment. The wall must be flat and of sufficient strength in order to be able to carry the boiler weight with its water content. Above the boiler there must be at least 210 mm working space in order to be able to fit a horizontal concentric flue system to the rear (See chapter 9.8 for more flue options). Make sure there is sufficient service space around the boiler according figure 8.a. The location of the boiler can be determined by using the template.

The wall frame allows the possibility to pre-fit the complete heating and DHW system before fitting the boiler. Also the flue system can be prepared. Finally fitting of the flue system is done after fitting the boiler. See next page for all options for connection the heating, DHW, condensate, flue and gas installation.

Before hanging the boiler to the boiler frame remove the front panel of the boiler first. The front panel is also the air cabinet and is attached to the boiler case with 2 fasteners (A and B) (see figure 8.a).

Note that there is an earth cable (when present) 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 present) when placing back the boiler front panel and take care the wire does not get stuck between front panel and boiler. Always replace and turn the 2 screws tight in the fasteners A and B.

Service dimensions (in mm)

See chapter 9.8 for further procedure to fit the boiler onto the boiler frame.

Figure 8.a

Page 13

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.

Note that there are free spaces on the left and right of the expansion vessel. Do not guide pipe work in front of the expansion vessel. The pipe work must be installed at least 10mm inside the front of the frame.

Figure 8.1 a

Page 14

The boiler has the following connection pipes;

The central heating pipes. The boiler is provided with isolation valves on the flow and return pipe to which the installation can be connected by means of 22mm compression fittings;
The gas pipe. The boiler is provided with an isolation gas valve to which the gas line can be fitted with 22mm compression fitting;
The condensation drain pipe. It consists of a 25mm flexible plastic pipe. The drain pipe can be connected to this by means of an open connection;
The flue gas exhaust system and air supply system. It consists of a concentric connection 60/100 mm.
Cold and hot water pipes. The boiler is provided with a isolation valve on the cold water inlet. The DHW installation can be connected by means of 15mm compression fittings.

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 flush the installation before connecting it to the boiler.

9.1 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 22mm compression fittings. For connecting to thick-walled pipe (welded or fitted), adapters should be used.

The boiler has a self-adjusting and self-protecting control system for the load. This involves checking the temperature difference between the flow and return water. Table 9.1.a shows the water displacement the circulation pump can deliver for a particular installation resistance.

If the installation resistance is higher than the value stated, the control system will adjust the load until a temperature difference between flow 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 flow and return water has decreased again.

	Pump type
Boiler		Water flow ra	ite at ∆T 20°C	Permissible insta	llation resistance
type		l/min	l/h	kPa	mbar
	Grundfos
iC 24	UPM3 15-75	15.2	910	25	250
iC 28	UPM3 15-75	15.2	910	25	250
iC 36	UPM3 15-75	20.3	1220	20	200
iC 40	UPM3 15-75	20.3	1220	20	200
iC Economiser 27	UPM3 15-75	15.2	910	25	250
iC Economiser 35	UPM3 15-75	20.3	1220	20	200
iC Economiser 39	UPM3 15-75	20.3	1220	20	200

Installation resistance

table 9.1.a

The control system will, if an unacceptable temperature difference is detected, repeatedly try to establish a water flow. If this does not succeed, the boiler will block itself (code 154).

The boiler is NOT equipped with a built-in internal filter.

Advice: ATAG Heating Technology Ltd recommend the installation of an in-line filter installed into the heating return as close to the boiler as possible. ATAG Heating Technology Ltd recommend the use of the:

ATAG iGuard Magnetic filter 22mm (Plastic) FC000100, (Brass) FC000200, 28mm (Brass) FC000250.

Page 15

Additives in the installation water are only permitted in consultation with the country distributor. See chapter 9.3 for detailed information.

9.2 Expansion vessel

The iC boilers are featured with a built-in expansion vessel with a capacity of 8 litres and a pre-pressure charge 1 bar. If the expansion vessel size is insufficient 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 9.2.a.

The (additional) expansion vessel should be connected as closely as possible in the return pipe near the boiler.

Installation height above the expansion vessel	pre-charge pressure of the expansion vessel
5m	0.5 bar
10m	1.0 bar
15m	1.5 bar

table 9.2.a

The pressure relief valve outlet is combined with the condensate outlet (see figure 9.9.e on page 29)

9.3 Water quality

Fill the installation with mains cold water.

In most cases, a heating system can be filled 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 filling water has to meet the specifications mentioned in table 9.3.a:

If the filling water does not meet the required specifications, you are advised to treat the water to such an extent that it does meet the required specifications.

The warranty becomes invalid, if the installation is not being flushed and/or the quality of the filling water does not meet the specifications 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 find an explanation of these definitions)
If the mains water quality meets the specifications mentioned in table 9.3.a, you can start flushing the installation before installing the device.
Whilst flushing, corrosion products (magnetite), fitting products, cutting oil and other undesirable products have to be removed.
Another possibility is to remove the pollution by installing a filter. The filter type has to fit the type and grain size of the pollution. ATAG Heating Technology Ltd recommends filter 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 filling water in accordance with the period laid down by the additives supplier.

Page 16

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 specifications 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.

Parameter	Value
Water type	Potable water
	Softened water
рН	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% filling 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 9.3.a

Water quality in DHW facility

Parameter	Value
Water type	Potable water
рН	7.0-9.5
Conductivity (at 20°C in µS/cm)	Max. 2500
Chloride (ppm)	Max. 150
Iron (ppm)	Max. 0.2
Hardness (°dH / ppm):	1-12 °dH / 17-214 ppm
Number of bacterial colonies at 22°C (number/ml). pr EN ISO 6222	Max. 100

able 9.3.b

- When the amount of chloride is above the required specifications mentioned above in table 9.3.b, in case of the use of a combi boiler will void the warranty for DHW parts of the boiler.

Water type definition:

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.

Page 17

9.4 Heating systems with plastic pipes

When connecting or using an underfloor 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 underfloor 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 underfloor heating pipes.

9.5 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 identification 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 fitting, into which the gas line can be fitted.

9.5.1 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 21 mbar +/- 2 mbar for Nat gas (G20). Allowing for the acceptable pressure loss of 1 mbar across the installation pipework, it can be assumed that a minimum permitted operating pressure of 18 mbar 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 4 mbar.

9.5.2 Propane gas connection (LPG)

The LPG installation must comply to the current Gas Safety, Installation & Use Regulations, in accordance with BS:6891

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 3.8 mbar.

Page 18

9.5.3 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 / 37 mbar and a CE certification.

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 fitting the regulator outside the regulator should be protected against influences of the weather. The (de-) aeration must be positioned downwards (see figure 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 37 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

9.5.4 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 helow

Boiler type	iC 24	iC 28	iC 36	iC 40	iC Economiser 27	iC Economiser 35	iC Economiser 39
Diameter gas line	m	m	m	m	m	m	m
ø15mm	3	-	-	-	-	-	-
ø22mm	30	18	18	18	18	18	18
ø28mm	-	30	30	30	30	30	30

9.5.5 De-aerating the LPG tank

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.

Page 19

9.6 Hot water supply

Connection of the drinking water installation should be done according to the Water Supply (Water Fittings) Regulations and Scottish Water Byelaws.

The ATAG iC boiler is fitted 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 flowing through the plate heat exchanger up to 60°C (adjustable) instantaneous.

The water mains installation must comply with the Water Supply (Water Fittings) Regulations and Scottish Water Byelaws. See also chapter 9.3.

In regions with a water hardness value higher than 200ppm (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 calcification 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 the United Kingdom. The water company can provide exact

information about this.

The domestic water installation can be connected to the boiler by means of 15mm compression fittings. If the mains is fitted with water meter, check valves or loose jumper stop cock, then a DHW expansion device must be fitted.

The boiler is provided with a DHW flow restrictor. The flow restrictor 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 flow rate with a fully opened hot water tap,

If required the flow restrictor can be removed. See chapter 16.1.

9.7 Condensation drain pipe

The ATAG condensing boiler has the >88% Efficient SEDBUK 2009 for high energy efficiency in heating and domestic hot water. The ATAG wall hung gas fired 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 9.7.1, 9.7.2(a), 9.7.2(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.

Page 20

ain requirements

Drain requirem

Page 21

Use of a condensate pump (to an internal termination):

Condensate can be removed using a proprietary condensate pump (third party delivery), of a specification recommended by the pump manufacturer. Condensate pump suitable for combined pressure relief valve. 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 9.7.3 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.

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 fittings, 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 specific 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 9.7.4 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 flow of rainwater into the boiler should the downpipe itself become flooded or frozen. Figure 9.7.5 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 9.7.6 shows a suitable connection method.

Where the condensate drain pipe terminates in a purpose-designed soakaway (see BS 6798:2014 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 9.7.7 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 fill the siphon with 150 ml of water.

Page 22

Page 23

9.8 Flue gas exhaust system

The flue gas exhaust system and air supply system consists of:

- Flue gas pipe;

Air supply pipe:
Roof or wall terminal.

The flue gas exhaust system and air supply system must comply with:

The flue gas outlet and air supply installation must comply with the current regulation requirements in accordance with BS:5440 Part 1 and 2.

The ATAG iC boiler as described in this manual is NOT suitable for a combined flue system.

The appliance concentric connection diameter is 60/100 mm, to which the flue gas outlet and air supply system can be fitted, with or without elbow pieces. The maximum permissible pipe length is set out in Table 9.8.2.a.

For further information about the available components of the flue gas and air supply system we recommend you consult the Flue system literature. Combinations with other brands or systems are, without written permission from ATAG Heating, not permitted.

The ATAG flue gas system is meant, and designed, solely for the use on ATAG central heating boilers adjusted to Nat gas or LPG. For this purpose the CE Certificate has been supplemented under the Gastec nr: 0063CQ3634 The maximum flue gas temperatures are below 70°C (full load 80/60°C).

The proper operation may be adversely influenced 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.

Room sealed syste

Page 24

9.8.1 Flue terminal locations

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 fig 9.8.1.c).

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 flue 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, where the terminal is less than 2m (6.6ft) above a pavement or platform to which people have access (including) any balcony or flat roof. The terminal must be protected by a guard of durable material.

Where a terminal is fitted 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.

The flue must be terminated in a place not likely to cause a nuisance.

For horizontal flue terminal direct to the rear or side through the wall (only 1 bend and 1 wall terminal) the terminal should be placed horizontal. The flue pipe inside the terminal is fitted in a 3 degrees angle to ensure the condensation water can run back to the boiler. See figure 9.8.1.a.

For longer horizontal sections, the outlet system should always be fitted on an incline (52 mm/m = 3°) sloping down towards the boiler so that no condensation water is able to accumulate in the outlet system. The chances of icicles forming on the outlet is minimised by causing the condensation water to run back towards the boiler. See figure 9.8.1.b.

Figure 9.8.1.a

Figure 9.8.1.b

Page 25

NI	otoc	•
13	ULES

In addition, the terminal should not be nearer than 150mm to the framework of an opening into the building, i.e. a window surround or door surround. This clearance may be reduced to 25mm without effecting the performance of the boiler. However, to ensure the condensate plume does not affect adjacent
This clearance may be reduced to 25mm without effecting the performance of the boiler. However, to ensure the condensate plume does not affect adjacent surfaces a clearance of 300mm is preferable. These clearances may be reduced to 25mm without effecting the performance of the boiler. However, to ensure the condensate plume does not affect adjacent
3. These clearances may be reduced to 25mm without effecting the performance of the boller. However, to ensure the condensate plume does not affect adjacent surfaces the terminal can be extended beyond gutters, pipes, eaves, balconies etc. by up to 500mm. If the flue is extended more than 500mm outside, it should be boxed and insulated.
To reduce the possibility of nuisance to neighbouring buildings etc. it is recommended the terminal should not be less than 2500mm from car parking spaces, building boundary walls, fences etc.
A terminal must not be sited under a car port roof
In certain weather conditions the terminal will emit a plume of steam. If possible avoid positioning the terminal where this may cause a nuisance, i.e. positions A, D. G. H. J or M.
The flue terminal must be exposed to the external air and the position must allow the free passage of air across it at all times.
A terminal must be exposed to the external and the position must allow the free passage of an across it at an times. A terminal must not be sited below 2m where people have access to, such as public footpaths, access routes, patios etc. However, If the terminal is fitted less than 2m above a surface where there is no public access, the terminal must be protected by a terminal guard.

Page 26

The appliance produces a white wisp of condensate (plumeing). This wisp of condensation is harmless, but can be unattractive, particularly in the case of outlets in outside walls.

For wall terminals a plume management kit is available as an option (see fig. 9.8.1.d)

Plume management kit

	Terminal position Plume Management Kit (mm)
1	Clearance no less than 200 mm from the lowest point of the balcony or overhang.
2	1,200 mm from an opening in a car port on the same wall i.e. door or window leading into dwelling.
3	The flue cannot be lower than 1,000 mm from the top of the light well due to the build up of combustion products.
4	1,200 mm between air intake and facing terminal.
5	Internal/external corners. The air intake clearance can be reduced to 150 mm providing the flue exhaust outlet has a 300 mm clearance.
6	600 mm distance to a boundary or surface facing a boundary, unless it will cause a nuisance. BS 5440: Part 1 recommends that care is taken when siting terminals in relation to boundaries.

See also Notes on previous page. Plume kits running horizontally must have a 10° fall back to the boiler for proper disposal of condensate. For details on specific lengths see relevant chapter Dimensioning of the flue gas and air intake duct.
A terminal must not be sited under a car port roof. 4.

Page 27

9.8.2 Dimensioning of the flue gas and air intake duct

The total length of the run of the flue is determined by the flue diameter, including for the connection pipe, elbows fittings and terminal covers etc..

An incorrect dimensioned flue system can lead to disorders. Look at table 9.8.2.a for the choice of the boiler and the corresponding maximum equivalent flue length.

Explanation table 9.8.2.a:

Concentric flue gas system:

maximum noted length L = distance between boiler (from elbow or vertical adapter) and the end of terminal

When using bends the noted value behind every bend should be deducted from the maximum straight length. See example.

Dimensions flu	ue gas	system ar	nd air suppl	y system

	iC 24 iC 2	28 iC Economiser 27	iC 36	iC 40	iC Economiser 35	iC Economiser 39
m		13			6
m		-1.0			-1.0
m		-1.6			-1.6
	m m m	m m m	IC 24 IC 26 IC Economiser 27 m 13 m -1.0 m -1.6	IC 24 IC 26 IC Economiser 27 IC 36 m 13 -1.0 -1.6	IC 24 IC 26 IC Economiser 27 IC 36 IC 40 m 13 -1.0 -1.6	IC 24 IC 26 IC Economiser 27 IC 36 IC 40 IC Economiser 35 m 13 6 m -1.0 -1.0 m -1.6 -1.6

Туре		iC 28	iC Economiser 27	iC Economiser 35
Maximum equivalent length (L)	m	5	50	45
45° bend resistance length	m	-1	.9	-1.9
87° bend resistance length	m	-3	3.0	-3.0

Tabel 9.8.2.a

Example: An iC28 with a concentric flue gas system ø60/100mm has according to the table a maximum flue straight length of 18m In the system that is going to be put in there are 2 x 45° bends, so the maximum flue gas length is 18 – (2 x -1.0) = 16m.

Flue dimensions

Rear Flue	B (mm)
	Min	Max
Telescopic flue (FA100105)	280	430

Side Flue	B + C (mm)
	Min	Max
Telescopic flue (FA100105)	285	435

Page 28

Figure 982a

Fitting the flue

Note : If it is required to cut an extension, DO NOT cut the end of the inner duct that incorporates the seal joint.

Ensure the inner duct end without the seal joint is cut so that it is flush with the outer duct. Ensure that all cuts are square and free from burrs

Once assembled with the components pushed home, the flue is fully sealed.

1. Adjust the telescopic flue and secure with sealing tape supplied or cut the fixed length terminal flue to the required length.
2. Fit the flue to the extensions (if required) by locating the inner duct into the seal joint and push fully home the inner and outer duct.
3. When connecting the horizontal flue terminal length ensure the terminal end outlet is at the uppermost part of the flue.
4. Pass the terminal flue assembly through the wall.
5. Fit the bend to the boiler turret.
6. If the inside sealing collar (white) is being used, then it will need to be fitted before assembling the flue and making good the inside wall.
7. Pull the flue assembly towards the bend, locating the inner duct into the seal joint on the bend and secure the flue assembly to the bend by pushing fully home (Outer flue duct must be seen through the small inspection hole to confirm fully home).
8. Make good the outside wall and fit the outside sealing collar onto the location provided immediately behind the flue terminal grille.

When mounting the flue gas system, pay attention to the flow direction (See figure 9.8.2.b). It is not permitted to mount a system upside down and will lead to complaints.

Use a soap solvent or special grease (supplied in the accessory bag with the boiler) to simplify the fitting.

The ATAG flue system used is a push fit flue system, which does not require screws to be fitted at each flue joint.

The flue system must be adequately supported at regular intervals between brackets of no more than 1.0 metres for horizontal sections and no more than 2.0 metres for vertical sections.

Page 29

99 Fitting the boiler onto the boiler frame

After the pipe work of gas, heating installation and DHW installation has been fitted to the boiler frame, the boiler can be placed on the boilerframe

Before hanging the boiler to the boiler frame remove first the cover of the boiler first. The cover is also the air cabinet and is attached to the boiler case with 2 fasteners (A and B) (see figure 8.a).

Note that there is an earth cable (when present) to disconnect when removing the cover from the boiler. Free space for removing the connector is 400mm. Remember to connect this earth cable (when present) when replacing the cover.

Always replace and turn the 2 screws tight in the fasteners A and B after replacing the cover.

Remove furthermore the 6 plastic caps from the boiler connections.

When removing the plastic sealing caps from the pipes, contaminated testing water may be released.

A Lift the boiler only by the boilers case.

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.

1. Press all connection underneath the boiler upwards
2. Put on each valve and the elbow fitting a fibre washer (supplied)

Place mains

/!\

water filter in

3 and 4. Take the boiler and hang it from approx. 50mm higher than the boiler frame vertical downwards on the boiler frame so the fittings will be axial approached.

Page 30

Fitting the nuts:

Turn each nut of the fittings on the boiler connections by hand and tighten each nut with a wrench.

Figure 9.9.d

Fitting expansion vessel hose:

Take the end of the flexible expansion vessel hose and fit it to the 3/8" boilers expansion vessel connection using a fibre washer.

Figure 9.9.e

Fitting siphon:

Press and turn the assembly (3), with the elbow first, in the corresponding holes in the bottom plate of the boiler.
Press the black flexible pipe (1) from inside the boiler in the rubber T-piece (3).
Press the black rubber elbow with flexible drain pipe (1) on the condensate tray (2)
Lead the long black flexible pipe (4) through the free hole of the boiler frame and press it in the T-piece (3)
Lead the other end of the flexible pipe outside the boiler to the drain as installed according to the installation and service manual.
Fill the siphon cup (5) with 150 ml water , insert the siphon pipe (6) in the siphon cup (do not press) and insert this through the hole in the bottom plate of the boiler into the condensate tray (2) of the heat exchanger. Secure the siphon cup with the securing clip (7) by turning it clockwise (click!).
Press the sealing ring (8) around the siphon cup and press/turn it in the bottom plate of the boiler.
* iR-Range only: Press the black rubber plug (9) from inside the boiler in the rubber elbow of assembly (3).
deaerator in the opening (10). NOTE: The plug remains closed when the flexible transparent tube from the automatic deaerator is not connected.

Before putting the boiler into operation fill the siphon with 150 ml of water.

Page 31

10 Electrical connection

The appliance complies with the actual directives. The installation must continue to comply with:

A 230V -50Hz mains electrical supply is required fused externally at 3A.
A deviation on the grid of 230V (+10% or -15%) and 50Hz
the national rules for electrical installations.

The appliance must be connected to an earthed socket. This must be visible and within reach.

The following general stipulations also apply:

No changes may be made to the wiring of the appliance;
All connections should be designed in accordance with the enclosed regulations;

- Should it be necessary to change it, the mains power supply cable may only be replaced with an ATAG mains power supply cable.

The connection terminals are positioned at the back of the control unit:

- Press handle A slightly to the left (see fig. 10.a)

- Turn the control unit downwards.

terminal block

Page 32

10.1 One controller, OpenTherm and BUS connection (blue)

The blue BUS connection can only be used for the ATAG ONE controller (CT000111), an OpenTherm controller or the ATAG 7 Day Two Channel Plug-In Digital Programmer (CT200002).

10.2 Room thermostat volt free connection (black)

A volt free on / off room thermostat or a programmable room thermostat with volt free connections can be wired to the black volt free room thermostat connector position.

The ATAG 7 day, Single Channel Digital Wireless Programmer and Room Thermostat (CT200001) or ATAG 24 hour, Single Channel Mechanical Wireless Programmer and Room Thermostat (CT100002) both come with the receiver fitted within a replacement facia panel for the front of the boiler and their volt free plug connects into this Room thermostat volt free connections (black).

10.3 ATAG Central Heating volt free timer connection (white)

The ATAG 24 hour, Single Channel Plug-in Mechanical Timer (CT100001) comes fitted within a replacement facia panel for the front of the boiler and the volt free plug connects into this Central Heating volt free connection (white).

This enables the boiler to be available for heating during the set times of the timer.

A volt free room thermostat is still required to be connected to the Room thermostat volt free connection (Black) to create a demand for heat via a room stat.

10.4 ATAG Hot Water volt free timer connection (white)

This connection enables and disables the boiler to provide hot water during the set times if a specific timer was connected.

10.5 DHW sensor connection (yellow)

N/A not applicable.

10.6 ATAG Outside sensor (orange)

When a weather compensation sensor (supplied with the boiler) is used, the two wires from the outside sensor get wired into the plug supplied with the sensor and connect onto the orange connector position.

10.7 230V Control Block (230V live output)

If a live, neutral or earth wire is required for an external clock/programmer these can be taken from the (L) live, (N) Neutral or (E) earth 230V live output connections on the 230v control terminal block. If an external 230V clock/programmer is used, then a switched live is required from the control(s) to connect to the 230V control terminal block in position (SwL) Switched live to fire up the boiler.

10.8 230V Control Block (SwL Switched live)

If a 230V room thermostat is used, then a switched live is required from the control(s) to connect to the 230V control terminal block in position (SwL) Switched live to fire up the boiler. This could be in series after the clock/programmer to the room stat, then to SwL on the 230V control terminal block.

Page 33

10.9 Electrical diagram

Figure 10.7.a

Page 34

Filling system

The central heating installation needs to be filled with potable water according to the requirements in chapter 9.3 'Water guality'. For filling or topping up the installation use the filling loop according to the following procedure (see figure 11.a);

1	Attach the filling loop pipe to the filling loop assembly (between position 1 and 2);
2	Open the filling loop valves A and B;
3	Slowly fill the central heating system up to 1.0 – 1.2 bar; (at the bottom left a pressure gauge indicates the water pressure in the central heating system)
4	Close the filling loop valves A and B;
5	Vent the entire heating installation starting at the lowest point;
6	Check the water pressure and top up if necessary to 1.0 – 1.2 bar;
7	Check the filling loop valve is closed;

When powering up the boiler (described in chapter 13) an automatic de-aeration program will run to vent the boiler. During this program the pressure in the central heating needs to be checked, and when necessary, topped up again.

It may take some time before all the air has disappeared from a filled installation. Certainly during the first week sounds may be audible that indicate air. The automatic air vent in the boiler will let this air escape, causing the water pressure to drop during this period and water will need to be refilled again.

Always remove the filling loop pipe after filling or topping up the heating system and close the connections with the cap nut (3)

Figure 11.a

11.1 Hot water supply

Fill the hot water supply by opening the cold mains isolation valve.

Bleed the hot water installation by opening all hot water taps one at a time. Leave each tap to run until all air has disappeared from the supply.

Flush with a minimum of 10 litres to rinse any residual contaminants from the hot supply and boiler.

Page 35

Before the electrical power is switched on, it helps to know the operation of the boiler in advance. On this page the controls are described in short. The next page describes the button functions and the symbols on the display.

The boiler is equipped with self-managing control system. This control system takes over a large part of the manual settings, which simplifies the start-up of the installation considerably.

After filling the installation and switching on the electrical power supply a short start-up program is activated. This shows all digits, boiler type and software version and the automatic de-aeration program is activated. The automatic de-aeration program lasts for approx. 7 minutes and stops automatically. The boiler fires up for DHW to bring the primary heat exchanger to the set comfort temperature. Then the boiler will switch on for the enabled program (CH or DHW) (See chapter 11 'Filling and bleeding boiler and installation').

DHW controls (combination boilers)

If a hot water tap is opened the flow sensor measures (F1) the amount drawn off. Depending on the desired DHW temperature and volume the controls will calculate an output. This realises the desired water temperature in an efficient way. The hot water sensor (T3) will adjust any minor deviations caused by temperature fluctuations so that even under these circumstances the desired temperature is constant.

Outside sensor T4 Flow sensor T1 Return sensor T2 DHW sensor T3 Flue sensor T5 NTC1k (25°C) NTC10k (25°C) Temperature Resistance Temperature Resistance [°C] [Ohm] -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.474 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.264 36 6.271 6 2.186 38	Resistance ta	ble sensors	ATAG iC-, iS- an	d iR-series
Return sensor T2 DHW sensor T3 Flue sensor T5 NTC1k (25°C) Temperature Resistance [°C] [Ohm] (°C) -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.8171 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921	Outside sensor	· T4	Flow sensor T1
DHW sensor T3 Flue sensor T5 NTC1k (25°C) NTC10k (25°C) Temperature Resistance Temperature Resistance [°C] [Ohm] [°C] [Ohm] -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 3			Return sensor T	2
Flue sensor T5 NTC1k (25°C) Temperature Resistance Temperature Resistance [°C] [Ohm] [°C] [Ohm] -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271			DHW sensor T3
NTC1k (25°C) NTC10k (25°C) Temperature Resistance Temperature Resistance [°C] [Ohm] [°C] [Ohm] -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.477 -5 3.600 16 14.988 -4 3.435 18 13.674 -5 3.600 16 14.988 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 <			Flue sensor T5
Temperature Resistance Temperature Resistance [°C] [Ohm] [°C] [Ohm] -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.799	NTC1k (25°C)		NTC10k (25°C)
[°C] [Ohm] [°C] [Ohm] -10 4.574 -10 55.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.8271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1	Temperature	Resistance	Temperature	Resistance
-10 4.574 -10 5.047 -9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920	[°C]	[Ohm]	[°C]	[Ohm]
-9 4.358 0 32.555 -8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840	-10	4.574	-10	55.047
-8 4.152 10 19.873 -7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763	-9	4.358	0	32,555
-7 3.958 12 18.069 -6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.6271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621	-8	4,152	10	19.873
-6 3.774 14 16.447 -5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621	-7	3.958	12	18.069
-5 3.600 16 14.988 -4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555	-6	3.774	14	16.447
-4 3.435 18 13.674 -3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492	-5	3.600	16	14.988
-3 3.279 20 12.488 -2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433	-4	3,435	18	13.674
-2 3.131 22 11.417 -1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375	-3	3 279	20	12 488
-1 2.990 24 10.449 0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320	-2	3,131	22	11.417
0 2.857 26 9.573 1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268	-1	2,990	24	10.449
1 2.730 28 8.779 2 2.610 30 8.059 3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218	0	2.857	26	9.573
1	1	2 730	28	8 779
3 2.496 32 7.406 4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125	2	2 610	30	8 059
4 2.387 34 6.811 5 2.284 36 6.271 6 2.186 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.125 70 1.753 23 1.081 72 1.638 24 1.040	3	2 496	32	7 406
1	4	2 387	34	6 811
5 2.867 38 5.779 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000	5	2.001	36	6 271
0 2.103 40 5.330 7 2.093 40 5.330 8 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000	6	2.204	38	5 779
1 2.004 42 4.921 9 1.920 44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926	7	2.100	40	5 330
9 1.320 1.44 4.547 10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.876 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892	8	2.000	40	4 921
10 1.840 46 4.205 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858	9	1 920	44	4 547
10 1.040 48 3.892 11 1.763 48 3.892 12 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858	10	1.840	46	4 205
11 1.690 50 3.605 13 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 <	11	1 763	48	3 892
12 1.621 52 3.343 14 1.555 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.057 30 827 86 1.037 35 687 88 974 40 575 9	12	1.690	50	3 605
10 1.557 54 3.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	13	1.621	52	3 343
14 1.000 04 0.102 15 1.492 56 2.880 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	10	1.555	54	3 102
13 1.432 58 2.607 16 1.433 58 2.677 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	15	1 492	56	2 880
10 1.375 60 2.371 17 1.375 60 2.490 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	10	1 433	58	2.000
11 1.010 00 2.430 18 1.320 62 2.318 19 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	10	1 375	60	2.077
10 1.268 64 2.159 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	18	1 320	62	2 318
10 1.203 04 2.133 20 1.218 66 2.013 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	10	1 268	64	2 159
20 1.210 00 2.510 21 1.170 68 1.878 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.007 30 827 86 1.037 35 687 88 974 40 575 90 915	20	1 218	66	2.100
21 1.175 00 1.575 22 1.125 70 1.753 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	20	1 170	68	1 878
22 1.125 10 11.135 23 1.081 72 1.638 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	22	1 125	70	1 753
25 1.040 74 1.531 24 1.040 74 1.531 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	23	1.081	70	1.638
27 1.040 74 1.331 25 1.000 76 1.433 26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	23	1 040	74	1.530
26 962 78 1.341 27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	25	1.040	76	1 4 3 3
27 926 80 1.256 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	25	962	70	1 341
21 320 30 1.230 28 892 82 1.178 29 858 84 1.105 30 827 86 1.037 35 687 88 974 40 575 90 915	20	926	80	1 256
29 858 84 1.178 30 827 86 1.037 35 687 88 974 40 575 90 915	21	802	80	1 179
20 300 827 86 1.037 30 827 86 1.037 35 687 88 974 40 575 90 915	20	858	02 Q/	1 105
35 687 88 974 40 575 90 915	29	827	94 88	1.103
40 575 90 915	30	687	88	974
	40	575	90	915

Resistance table

table 12.a

CH controls

With a demand from the heating controls after DHW demand, the boiler activates its 1 minute delay period. This is to prevent the heat exchanger from losing its heat too quickly in the event of a hot water demand. Then the pump starts and after 30 seconds the gradient control becomes

active. The starting point of the gradient control is the currently existing flow temperature. A Delta-T control (25K) ensures a stable control according to heat request.

If the flow temperature is below the T-set value of 20°C the boiler will immediately start.

If during a demand from the heating the burner switches off, because the desired flow temperature is exceeded, there will be an anti-cycle time in operation for 5 minutes. This means that the burner switches on again after 5 minutes if there is still a demand from the heating.

The ATAG iC is equipped with boiler sensors of 10kOhm. The resistance value and corresponding temperature are shown in the accompanying table.

Page 36

12.1 Controls and explanation of the functions

Hot water

Setting the hot water temperature.

Briefly press + or – ; the display will show the flashing preset value; Briefly press + or – to change the set value. Each change becomes active directly.

Hot water program OFF: Press – until the lowest value is reached and then press – again. The display is showing - - .

Switching on works in reverse order.

Central heating

Setting the CH water temperature: Briefly press + or – : the display will show the flashing preset value: Briefly press + or – to change the set value. Each change becomes active directly.

CH program OFF: Press – until the lowest value is reached and then press – again. The display is showing - -Switching on works in reverse order.

Boiler information

Requesting current data:

Press the eco-button for 6 seconds in order to obtain the following value using the scroll buttons Flow water temperature in °C DHW temperature in T-set temperature (calculated) in °C A4 Flue gas temperature (only if a flue gas sensor is connected) in °C Outside temperature (only if an outside sensor is connected) in °C Water pressure in bai DHW flow in I/min. A8 Ionisation current in uA rpm of fan (x100)

turn to the standard view press ESC

Reset button

The reset button allows the boiler to restart if an error has occurred. In case of an error the A symbol is displayed with a XXX code. In other cases the Reset button does not function and will not respond to operation See chapter 17 for a brief overview of codes

Ancillary functions:

Both + buttons = Commissioning-mode for checking the CO.

Page 37

13 Commissioning the boiler

Make sure before the boiler is put into operation that the boiler and installation have been fully vented. Vent the gas line and open the gas isolation valve to the boiler. The boiler requires no adjustment of the burner pressure and quantity, because it is self-regulatory and has been set in the factory and should not be reset.

Turn on the boiler electrical supply; When the boiler starts up for the first time the following will be shown: - (power on) All digits (segment test) 0 (parameter 9: from factory 0) 1 (boilertype: parameter 8) 03 followed by 03 (software version part 1 and software version part 2)

The code 105 appears on the display; The 7 minute de-aeration cycle starts; Vent the entire heating installation starting at the lowest point; Check the water pressure and top up if necessary to 1.0 – 1.2 bar; Check the filling loop if it is closed;

Waterpressure

The iC boiler is s	upplied with a pressure sensor. This sensor control has following settings
0.5 bar:	below this pressure the burner is blocked for operation
0.5 to 0.8 bar:	boiler output reduced to max. 80%
0.8 to 3.0 bar:	boiler fully functional
3.0 bar:	above this pressure the boiler is blocked for operation.

Next to this the pressure sensor is used to set the boiler free before every start. Before the burner is set free the boiler does a pump check, it checks for an increase in pressure when the pump starts. If there is an increase of water pressure, the boiler will fire up. If there is no increase the burner is blocked.

If the water pressure drops below 0.8 bar code 118 will appear in the display; The de-aeration program starts (code 105) when the water pressure has been below

0.5 bar. Between 0.5 and 0.8 bar the display shows code 118 and the boiler will run on a reduced output of max. 80%

The automatic de-aeration program will take approx. 7 minutes and will be followed by the default display (OK) if the water pressure is above 0.8 bar.

The boiler will switch on immediately to reach the desired pre-heat temperature (approx. 50°C) of the hot water supply (Comfort setting).

Page 38

The DHW program is always active after start-up. This is indicated by If there is hot water request, this is indicated by a flashing will be activated. The circulation pump will start and the boiler will switch on 6 .

Comfort and eco

By default the hot water supply is set to Comfort. A change to Eco is possible by means of pressing the eco-button. On the display appear 'eco'. The eco-position will result in a possible longer DHW waiting time, because the boiler will not being fired up for pre-heating the hot water supply.

CH system

The CH program is always active after start-up.

This is indicated by the 1

If there is heat request, it is indicated by a flashing IIII and the heating will be put into operation 6 .

The circulation pump will switch on and the boiler will switch on after 1 to 2 minutes.

When there is no more heat requested the radiator symbol m may be solid or flashing, but the flame b symbol will disappear. The pump will continue to run due to the pump over run feature (overrun time confirmed in technical specification table page 7).

Pump function

By default the boiler is set in such a manner that the pump will switch on in case of a heat request for CH or DHW. Switching on and off is managed entirely by the control system.

Danger of frost

If there is danger of frost damage to the CH installation and there is no outside sensor

connected, it is advisable to let the pump run continuously.

By pressing both - buttons at the same time for 8 seconds the pump can be switched on continuously.

If the pump is set to continuously this is displayed by 💥 .

Installation frost protection

If an outside sensor is connected, then the controls will regulate the pump:

In case of outside temperatures between +1.5 and -5°C the pump will run for 10 minutes every 6 hours.
In case of outside temperatures below -5°C the pump will run in frost protection mode.

Boiler frost protection

If there is no outside sensor connected, and if the (T1) flow sensor registers a temperature of 5°C or below in the boiler, the boiler will fire up. The boiler keeps on firing until the temperature reaches 10°C (measured on the flow sensor) and the boiler switches off again.

In this mode the 💥 symbol will flash.

Page 39

13.1 Settings

When the boiler is installed, it is in principle ready to be put into service. Most settings of the control system are already programmed from factory. Only parameter P0 (kind of heating installation) has to be checked and set, if necessary, to adjust the boiler to the connected installation.

To change this setting, proceed as follows:

1. Press the OK button for 3 seconds.

The display shows 'P0';

2. Press the OK button for 3 seconds again. The display shows 'on' shortly followed by 'P0';
3. Press the OK button to enter P0;
4. Choose one of the following options by using the left + and button (DHW symbol);
- 1. CH Tmax: 80°C; Gradient: 5; Heating line 24
- 2. CH Tmax: 70°C; Gradient: 5; Heating line 19
- 3. CH Tmax: 60°C; Gradient: 4; Heating line 15
- 4. CH Tmax: 50°C; Gradient: 3; Heating line 11
5. Press the OK button to confirm your choice;

When you want to change more settings proceed with step 6: When you are ready press the ESC button until the default display is shown again.

6. Press the Scroll button to select another parameter:

7. Press the OK button if you want to change the selected parameter;
8. Adjust the value if desired / possible with the + or button (DHW button)
9. Briefly press the OK button to confirm the new setting.

The display shows the selected parameter again

7. Press the ESC button until the default display is shown again:
- If during 8 minutes no button is used, the default display is automatically shown on the screen.

13.2 Parameter chapter

Par.	Factory setting	Description	Range
P0	1	CH Tmax: 80°C; Gradient: 5; Heating line 24 CH Tmax: 70°C; Gradient: 5; Heating line 19 CH Tmax: 60°C; Gradient: 4; Heating line 15 CH Tmax: 50°C; Gradient: 3; Heating line 11 Check and change, if necessary, this parameter before taking the boiler into operation.	1-4
P1	max	Maximum power CH in % Can only be reduced. 0 = low load	0 - max
P2	max	Pump, max. percentage	XX - 100%
P3	min	Pump, min. percentage	min - XX / XX*
P4	0%	Correction factor fan speed. Do not change!
P5	5 (NG) 0 (LPG)	Gradient speed CH	0 - 15 (0=off)
P6	24	Heating line CH-water temperature (see also heating line graph)	1 - 30
P7	25	Summer-Eco temperature (only when outside sensor is connected) Heating program switch off at set outside temperature	8 - 30
P8	1	Boiler type. Do not change! 1 = Natural gas fired boiler, 2 = Boiler with flue non-return valve, 3 = Propane gas fired boiler	1-3
P9	0	Service-parameter. Do not change!

* Depending of connected type of boiler control

Page 40

14 Isolating the boiler

In some situations it may happen that the entire boiler has to be deactivated. With the 2 function buttons for the DHW program and the CH program the boiler is put out of service.

Hot water program OFF: Press – until the lowest value is reached and then press – again. The display shows -- and the middle is off.

Switching on with the + button takes place in reverse order.

CH program OFF: Press – until the lowest value is reached and then press – again. The display is showing -- and the upper is off.

Switching on with the + button takes place in reverse order.

ATAG recommends to leave the electrical power supply on, so that the circulation pump and the three-way valve are activated automatically once every 24 hours in order to prevent jamming.

If there is danger of frost it is advisable in this case to drain the boiler and/or installation. (See following chapter)

Page 41

15 Commissioning

Work on the installation and/or boiler should only be carried out by qualified personnel with calibrated equipment.

At the time of commissioning, complete all revelant sections of the Benchmark Checklist located on At the inside back pages of the document.

For maintenance of the boiler the cover has to be removed. Unscrew the 2 locking screws from the fasteners at the top of the boiler unlock the fasteners and remove the cover in a forward motion. See figure 16.a

Changing settings, such as the burner pressure and the amount of air flow, is superfluous. Only in case of a failure or when replacing the gas block, venturi and/or fan, the CO, percentage should be checked.

Always check all gas carrying parts for leaks (with a leak detection spray) after (maintenance) work to the boiler.

Close the relevant commissioning valves during the maintenance activities. See figure 15.a.

Draining the boiler

Shut down the CH and DHW program and disconnect the 230V power supply
Close the isolation valve CH flow (1) & CH return (2)
Unscrew the cap nut from the return pipe filling loop connection (3)
Connect a hose and drain socket (4) to the return filling loop connection (3) and lead the other end of the hose to the drain.
Slowly open the valve (2A) of the filling loop on the return pipe completely. CH water will only be drain out from the boiler.
If the CH water from the system and boiler needs to be drained open the CV isolation valve (2)

Reassembly takes place in reverse order.

Page 42

15.1 Checking the CO,

The CO, check consists of 2 steps or, if necessary, 3 steps:

Step 1:Check on full loadStep 2:Check on low loadStep 3:Adjustment (if necessary).

Step 1: CO, check on full load

The CO₂ setting is preset at the factory on all boilers. A calibrated CO₂ control measurement must be carried out during commissioning.

- Ensure that the boiler is in operation and that the heat, which it produces, can be discharged.

Set the full load

You can set the full load of the boiler as follows:

Press both + buttons for 6 seconds (this will only give full CH output):
When the flame symbol appears in the display press both + buttons again for 6 seconds;
The display shows the flow water temperature ( source appears in the display )
The boiler will switch to maximum power output of the boiler;
Press 1x the eco- button;
the display shows XX% (heating capacity)
Calibrate the CO₂ measuring tool, and then insert the flue gas probe of the measuring tool into the measuring point of the flue gas pipe "a" (see illustration).
Wait for one minute and then carry out a combustion analysis.
Check whether the CO₂ values that are listed below correspond to the measured value.

After this check has been done, once more test the CO₂ value at low load (see Step 2 on page 42). If there are any deviations in the result, then these must be corrected (see Step 3 on page 43).

CO ₂ check on full load (Step 1)
Full load	Natural gas (G20)	Propane (G31)
00	Nominal 9,0%	Nominal 10,3%
	Minimum 8,6%, maximum 9,6%	Minimum 9,9%, maximum 11,0%

Values are valid with closed cover/air box.

Page 43

Step 2: CO, check on low load

Set the low load

The low load of the boiler can be set by you as follows:

Press on the button until the minimum value (0%) has been reached (low load)
Use the measuring tool to carry out a CO₂ control measurement. The detected values must lie in the measuring range shown below.

The CO₂ value at low load must be lower than the CO₂ value at full load. The measuring procedure must be carried out until a constant measuring result is achieved. Please contact ATAG if the values should lie outside of the applicable tolerances.

End of measuring:

- Press the ESC button ( IIII button). The device switches off The display shows for 2 seconds code 180 or 181.

This completes the procedure.

The maximum duration of the commissioning function, without interruption, is 8 minutes.

CO ₂ check on low load (Step 2)
Low load	Natural	gas (G20)	Propane (G31)
	Full load recorded	Accepted low range	Full load recorded	Accepted low range
	9.6%	9.3% - 7.5%	11.0%	10.9% - 8.9%
	9.5%	9.2% - 7.5%	10.9%	10.8% - 8.9%
	9.4%	9.1% - 7.5%	10.8%	10.7% - 8.9%
	9.3%	9.0% - 7.5%	10.7%	10.6% - 8.9%
	9.2%	8.9% - 7.5%	10.6%	10.5% - 8.9%
CO ₂ Example readings	9.1%	8.8% - 7.5%	10.5%	10.4% - 8.9%
	9.0%	8.7% - 7.5%	10.4%	10.3% - 8.9%
	8.9%	8.6% - 7.5%	10.3%	10.2% - 8.9%
	8.8%	8.5% - 7.5%	10.2%	10.1% - 8.9%
	8.7%	8.4% - 7.5%	10.1%	10.0% - 8.9%
	8.6%	8.3% - 7.5%	10.0%	9.9% - 8.9%
			9.9%	9.8% - 8.9%

Page 44

Step 3: Adjustment on the gas valve

Adjust the gas value only in case the measured values lies out of range of the values mentioned in the table on previous page.

Open the boiler as described on page 47;
Set the boiler on full load (see Step 1)
The CO₂ values are set by using an Allen key (2 mm), or a large flat head screwdriver, on the screw "b".

Please observe the following rotating direction:

Clockwise means less CO
Counterclockwise means more CO₂

Leaend

After this setting has been made, once more test the CO₂ value at full load and low load. See Step 1 and 2.
a Measuring point for the flue gas probe
b Set screw for CO₂

Adjustment of the gas valve in case the measured values lies out of range of the values on full load (Step 3)
Full load	Natural gas (G20) Propane (G31)
CO ₂	9,0%	10,3%

Values are valid with closed cover/air box.

Page 45

15.2 Checking flue integrity

The integrity of the flue system and performance of the boiler can be checked via the flue turret sample points shown in diagram 15.2.a.

A – Flue gas sample point B – Air intake sample point Figure 15.2.a

The case must be on the boiler and the boiler made to run at maximum output.

Press both + buttons for 6 seconds (this will only give full CH output);
When the flame symbol appears in the display press both + buttons again for 6 seconds;
The display shows the supply water temperature ( appears in the display) The boiler will switch to maximum power output of the boiler
Press 1x the eco- button; The display shows XX% (heating capacity)
Insert the analyser probe into the air intake sample point 'B'.
Ensure the probe reaches into the flow of air in air intake sample point. Ensure the sealing cone on the probe is sealed to the sample point and correctly position the end of the probe.
Allow the readings to stabilise and check that:
- O₂ is equal to, or greater than 20.6%.
- CÔ, is less than 0.2%
If the readings are outside these limits then this indicates that there is a problem with the flue system or combustion circuit, e.g. missing or dislodged seals.

End of measuring:

- Press the ESC button ( IIII button).

The device switches off.

The display shows for 2 seconds code 180 or 181. This completes the procedure.

Page 46

15.3 CO and combustion checks

IMPORTANT PRELIMINARY INFORMATION ON CHECKS

NOTE: The air gas ratio valve is factory set and must not be adjusted during commissioning unless this action is recommended following contact with the manufacturer.

If any such adjustment is recommended and further checking of the boiler is required the installer/service engineer must be competent to carry out this work and to use the flue gas analyser accordingly.

If the boiler requires conversion to operate with a different gas family (e.g. conversion from natural gas to LPG) separate guidance will be provided by the boiler manufacturer

PRIOR TO CO LEVEL AND COMBUSTION RATIO CHECK

The boiler manufacturer's installation instructions should have been followed, gas type verified and gas supply pressure/rate checked as required prior to commissioning.

As part of the installation process, especially where a flue has been fitted by persons other than the boiler installer , visually check the integrity of the whole flue system to confirm that all components are correctly assembled, fixed and supported. Check that manufacturer's max. flue lengths have not been exceeded and all guidance has been followed (e.g. Gas Safe Technical Bulletin TB008 where chimney/flues are in voids).

The flue gas analyser should be of the correct type, as specified by BS 7967

Prior to its use, the flue gas analyser should have been maintained and calibrated as specified by the manufacturer. The installer must have the relevant competence for use of the analyser.

Check and zero the analyser IN FRESH AIR as per analyser manufacturer's instructions. Key:

CO = carbon monoxide CO ₂ = carbon dioxide O ₂ = oxygen ppm = parts per million Combustion ratio = The CO reading measured in ppm divided by the CO₂ reading first converted to ppm GU(I&U)R = Gas safety (Installation & use) Regulation.

Page 47

Page 48

16 Routine servicing

ATAG Heating Technology advises on an interim service inspection with a flue gas analyser. A full strip down service is recommended at regular intervals or where analyser readings are not within correct safety standards.

Required tools:

Cross head screwdriver
T-handle key set with 3 bits (hex key 4mm, hex key 5mm and cross head PZ2)
Open end wrench 8mm

In order to perform maintenance, the following actions have to be taken:

Switch off the electrical power to the boiler;
Remove the screws from the 2 fasteners A and B (see fig. 16.a);
Unlock the fasteners A and B and remove the cover in a forward motion and remove the earth cable (when present) from the cover.

Note that there is an earth cable (when present) to disconnect when removing the boiler front panel. Free space for removing the connector is about 400 mm. Remind to connect this earth cable (when present) when placing back the boiler front panel and take care the wire does not get stuck between front panel and boiler. Always replace and turn the 2 screws tight in the fasteners A and B.

Figure 16.a

Air box/cover

The cover also doubles as air box:

- Clean the air box/cover with a cloth and a non-abrasive cleaner;

Siphon (see fig. 16.b)

The degree of pollution resedue in the siphon is an important indication for the need of maintenance

Turn the control unit towards by moving the handle (C) slightly to the left (see figure 16.a);
Turn/pull the sealing ring (1) downwards;
Turn the siphon securing clip (2) anti-clockwise;
Pull the siphon cup (3) and siphon pipe (4) out of the heat exchanger;
Take the siphon cup and pipe out of the boiler by moving it downwards or turn it in forward motion upwards along the heat exchanger:
Clean the parts by rinsing them with water;
Check the O-ring of the siphon cup and replace it if necessary;
Grease the O-ring again with acid-free O-ring grease to simplify the reassembly.

Reassembly takes place in reverse order.

fill the siphon with 150 ml of water .
If a leakage has occurred to the siphon, replace the entire siphon.

Fiaure 16.b

Page 49

Fan unit and burner cassette (see fig. 13.2.b-f)

Remove the velcro from the silencer and remove the silencer (1);
Unscrew the coupling (2) of the gas block and the coupling on the venturi (3) and remove the gasline (4):
Replace the gaskets of the gasline (O-ring) with new ones;

Disconnect the electrical connections from the fan (5):

Turn the left (6) and right (7) clamp bars a guarter turn with the hex key and pull these out in a forward motion. Mind the direction of rotation (red control cams);
Now lift the complete fan unit (5) with the upper tray of the heat exchanger and remove it in a forward motion:
Turn the unit up side down and remove the burner cassette (8) from the ventilator unit;
Check the burner cassette for wear and tear, pollution and any breakages. Clean the burner cassette with a soft brush and vacuum cleaner. In the case of breakages, always replace the complete burner cassette (8);

Page 50

The following operations must be performed carefully in relation to the vulnerability of the non return valve.

- After removing the burner cassette (8) the non return valve (12) becomes visible. Check that the non return valve entire circumference closes / seals completely. The valve should be able to move freely from fully open to fully closed (see fig. 16.e). Replace the non return valve if the valve does not seal properly. Follow the instructions supplied with the new part.

Replace the gasket (9) between the burner (8) and upper casing (10) ·
Replace the gasket (11) between the upper casing (10) and exchanger (Note the position in figure 16.f): Check the venturi (13) for pollution and clean them with a soft brush in combination with a vacuum cleaner if necessary

If the inside of the boiler casing is heavily polluted with dust, it is likely that the fan impeller is also polluted. To clean the fan, it has to be removed from the upper tray and the venturi. Clean the impeller with a soft brush and a vacuum cleaner. Replace the gasket and take care that the new gasket is installed properly when reassembling the fan parts.

Fiaure 16.h

Reassembly takes place in reverse order.

Heat exchange

Check the heat exchanger for pollution. Clean it if necessary with a soft brush and a vacuum cleaner. Avoid any pollution falling down.

TOP-FLUSHING THE EXCHANGER WITH WATER IS NOT ALLOWED.

Reassembly takes place in reverse order.

During installation pay attention to the correct position of the clamp bars. These have to be in a vertical position.

Page 51

Ignition electrode

Replacing the ignition electrode is necessary when the pins are worn. If the inspection hole is damaged, the entire ignition electrode has to be replaced.

It is replaced as follows:

Take away the plug connections on the ignition electrode:
Push the clip on top of the electrode upwards and take away the electrode:
Remove and replace the gasket;

Reassembly takes place in reverse order.

Always replace the gaskets of the removed parts during maintenance.

Put the boiler back into operation and carry out a flue gas analysis (see page 34).

Always put back the cover after (maintenance) work and secure it with screws A and B. Remind to connect this earth cable (when present) when placing back the boiler front panel and take care the wire does not get stuck between front panel and boiler. Always replace and turn the 2 screws tight in the fasteners A and B.

Please contact your installer or ATAG Heating Technology Ltd. for further details. Contact details can be found on the back page of this manual.

After servicing, complete the relevant Service Interval Record section of the Benchmark Checklist located on the inside back page of the document.

Page 52

16.1 Flow restrictor

If required the flow restrictor can be removed 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 and turn down the control unit
Remove the securing clip (1) to the left
Pull out the flow restrictor plug (2)
Remove the flow restrictor (3) using a long nose plier
Refit the plug (2) and secure it with the securing clip (1)
Turn on mains water inlet and purge water through all taps
Replace the boilers front cover.

16.2 Component replacement

In the event that parts require replacement, use only genuine parts supplied by ATAG Heating Technology Ltd.

16.3 User's instructions

Advise the user that for continued efficient and safe operation, the boiler should be serviced at least once a year by qualified servicing company. It is important and strongly recommended that arrangements are made for a maintenance agreement with a qualified servicing company to ensure regular servicing of the boiler.

Please contact ATAG Heating Technology Ltd. for further details. Contact details can be found on the back page of this manual.

16.4 Warranty

For the warranty conditions we refer to the Warranty Card that is supplied with the boiler.

Page 53

17 Error codes and fault finding

A detected failure is indicated on the display in blocking or error messages.

- Blocking code with spanner symbol

Error is temporary and will cancel itself or will lock the boiler after several attempts (error)

- Error code with bell symbol

Error means a lock on the boiler and can only be remedied by a reset and/or intervention by a service technician.

10 Outside sensor error (e.g. open, short circuit, out of range)
20 Flow sensor error (e.g. open, short circuit, out of range)
40 Return sensor error (e.g. open, short circuit, out of range)
50 T3 (DHW) sensor error (e.g. open, short circuit, out of range)
61 Bus communication error (contact open)
78 Water pressure outside of range or not connected
105 Venting program active when power turned on or interrupted (runs approx. 7 mins.)
110 Safety temperature exceeded
111 Maximum temperature exceeded
117 Pressure too high (> 3 bar) or pump pressure increase too high
118 Pressure too low (0.5 0.8 bar) or pump pressure increase too low (no pump detection)
119 Link on X2 position 4 and 5 missing
129 Fan error (fan does not start up)
133 No flame after 5 ignition attempts
151 Fan error (speed control is not achieved or is out of range) or control unit defective
154 Flow increases too fast Δ T too large, return > flow
180 No error: shortly visible when leaving chimney sweep function
181 No error: shortly visible when leaving commissioning mode

Example of display of error message

Page 54

Annex A System water additives

When the filling water requirements as referred to in chapter Water Quality have been met, certain additives are allowed for the below mentioned applications and related dosage. Warranty on ATAG delivered installation products expires, if these additives and concentrations are not used in accordance with this annex.

Additive type	Supplier and specifications	Max. concentration	Application
Corrosion inhibitors	ATAG Central Heating Protector. Build Cert Approved	500 ml / 100 litres	Suitable for mixed metal and plastic systems. Prevents corrosion and limscale.
	Sentinel X100 Corrosion resistant protection agent of CH systems Kiwa certified	1-2 I/100 litres CH water content	Aqueous solution of organic and inorganic agents preventing corrosion and scale forming
	Fernox F1 Protector Corrosion resistant protection agent of CH systems Kiwa certified KIWA-ATA K62581, Belgaqua certified Cat III	500 ml can or 265 ml Express / 100 litres CH water content	Preventing corrosion and scale forming
Anti-freeze	Kalsbeek Monopropyleneglycol / propane- 1,2-diol + inhibitors AKWA-Colpro KIWA-ATA Nr. 2104/1	50% w/w	Anti-freeze
	Tyfocor L Monopropyleneglycol / propane- 1,2-diol + inhibitors	50% w/w	Anti-freeze
	Sentinel X500 Monopropyleneglycol + inhibitors Kiwa certified	20-50% w/w	Anti-freeze
	Fernox Alphi 11 Monopropyleneglycol + inhibitors Kiwa certified KIWA-ATA K62581, Belgaqua certified Cat III	25-50% w/w	Anti-freeze in combination with F1 Protector
System cleaners	ATAG Central Heating Universal Cleaner	500 ml / 100 litres	Suitable for mixed metal and plastic systems. Disperses sludge, limescale and other deposits.
	Sentinel X300 Solution of phosphate, organic heterocyclic compounds, polymers and organic bases Kiwa certified	1 litre / 100 litres	For new CH installations Removes oils/grease and flow control agents
	Sentinel X400 Solution of synthetic organic polymers	1-2 litres / 100 litres	For cleaning existing CH- installations Removes sediments.
	Sentinel X800 Jetflo Aqueous emulsion of dispersants, moistening agents and inhibitors	1-2 litres / 100 litres	For cleaning new and existing CH- installations Removes iron and lime-related sediments.
	Fernox F3 Cleaner Liquid pH neutral universal cleaner for pre-commissioning new systems	500 ml / 100 litres	For cleaning new and existing CH-installations Removes sludge, limescale and other debris.
	Fernox F5 Cleaner, Express pH neutral universal cleaner concentrate for pre-commissioning new systems	295 / 100 litres	For cleaning new and existing CH-installations Removes sludge, limescale and other debris.

ATAG support the use of inhibitors suitable for mixed metal applications that keep the pH level between 6 and 8. Dosage levels as per manufacturers instructions. Preferred inhibitor suppliers are ATAG Heating Technology, Fernox and Sentinel.

Page 55

Annex B Declaration of conformity

CE DECLARATION OF CONFORMITY

Hereby declares ATAG Verwarming Nederland BV that,

the condensing boiler types:	ATAG
iC24	iC28	iC36	iC40
	iC Economiser 27	iC Economiser 35	iC Economiser 39

are in conformity with the provisions of the following EC Directives, including all amendments, and with national legislation implementing these directives:

Directive			Used standa	ards
Gas Appliance Directive	2009/142/E	C	EN15502-1:	2012
			EN15502-2;	2012
			EN60335-1:	2011
			EN60335-2-	102:2010
Boiler Efficiency Directive	92/42/EEC		EN677: 199	8
-			EN132031/2:2014
Low Voltage Directive	2014/35/EU		EN60335-2-102 :2010
C C			EN60335-1:	2011
EMC Directive	2014/30//EU	J	EN60335-2-	102 :2010
			EN61000-3-	2: 2009
			EN61000-3-	3: 2008
			EN55014-1:	2011
			EN55014-2:	2008
Ecodesian Directive	2009/125/E	С	EN 15036-1	:2006
		-	EN 13203-2	· 2014
			EN 15502-1	2012
Labelling Directive	2010/30/EU			. 2012
-
Report numbers	GAD	BED	LVD	EMC D
•	141000634	141000634	141000634	141000634

and that the products are in conformity with EC type-examination certificate number E0430, as stated by KIWA-Gastec Certification BV, Apeldoorn, The Netherlands.

Date 15 May 2016 Signature Drs. C. Berlo Full name CEO

Adres: Galileïstraat 27, 7131 PE Lichtenvoorde • Postadres: Postbus 105, 7130 AC Lichtenvoorde Telefoon: +31(0) 544 391777, Fax: +31(0) 544 391703 E-mail: info@atagverwarming.com Internet: http://www.atagverwarming.nl

Page 56

iC Range

Description	Qty	ATAG Pt. No.
Heat exchanger iCon1	1	S4863100
Heat exchanger iCon2	1	S4863200
Pump Grundfos UPM3 15-75	1	S4856100
Boiler control LMU iC	1	S4864300
Fan iCon 1	1	S4858300
Fan iCon 2	1	S4858400
Expansion tank 8L	1	S4854300
Gas valve	1	S4856300
Burner complete iCon1	1	S4849100
Burner complete iCon2	1	S4849200
Plate hex iCon1	1	S4851300
Plate hex iCon2	1	S4851400
Three way valve motor	1	S4855500
Condensate tray iCon1	1	S4863400
Condensate tray iCon2	1	S4863500
Igniter & gasket	1	S4863600
DHW flow sensor	1	S4746800
Water pressure sensor	1	S4466300
Igniter transformer	1	S4851000
Cable harness combi & system	1	S4863900
Air vent	1	S4419110
Siphon complete set	1	S4863700
Igniter cables	1	S4863800
NTC flow	1	S4891600
NTC DHW	1	S4746100
Flex hose expansion vessel	1	S4856900
Maintenance Set iCon1	1	S4867900
Maintenance Set iCon2	1	S4868000
Silencer iCon 1 & 2	1	S4847800
Gasket condensate tray iCon1	1	S4854600
Gasket condensate tray iCon2	1	S4854700
NTC return	1	S4746000
Connector roomstat (Black)	1	S4745100
Fuse T3,15 250V 3pcs	1	S4749200
Gasket pump 2pcs	1	S0009000
Clamp bar long	1	S4850900
Safety relieve valve	1	S4852500
Pressure gauge analogue	1	S4868100
Gasket set PHE (4 pcs)	1	S4743800
3 way diverter cartridge	1	S4828700
Connector OpenTherm (Blue)	1	S4745000
Connector External Safety	1	S4745200
Connector Outside Sensor (Salmon Pink)	1	S4745400
Hose coupling 3/8"-Drain off	1	S4867400
Flow Restrictor 10 I/m Yellow	1	S4762000
Flow Restrictor 12 I/m Brown	1	S4748500
Flow Restrictor 15 I/m Blue	1	S4774600
Flow Restrictor 17.5 I/m Green	1	S4779600
Mains water inlet filter	1	S4878200
Flue Gas Non Return Valve	1	AA07400U

Page 57

Benchmark Commissioning and Servicing Section

It is a requirement that the boiler is installed and commissioned to the manufacturers instructions and the data fields on the commissioning checklist completed in full.

To instigate the boiler guarantee the boiler needs to be registered with the manufacturer within one month of the installation.

To maintain the boiler guarantee it is essential that the boiler is serviced annually by a Gas Safe registered engineer who has been trained on the boiler installed. The service details should be recorded on the Benchmark Service Interval Record and left with the householder.

www.centralheating.co.uk

Page 58

GAS BOILER SYSTEM COMMISSIONING CHECKLIST

This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.

Failure to install and commission according to the manufacturer's instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect the customer's statutory rights.


Customer name: Telephone number:
Address:
Boiler make and model:
Boiler serial number:
Commissioned by (PRINT NAME):					Gas Sat	fe regis	ster num	ber:						·
Company name:					Telepho	ne nur	nber:
Company address:
					Commis	ssionin	g date:
To be completed by the customer o	on receipt of a Bu	ilding Regul	ations	Complian	ce Certif	icate*
Building Regulations Notification Num	ber (if applicable)	:
CONTROLS (tick the appropriate box	ies)
		Room th	nermos	tat and pro	grammer	/timer			P	rogram	nmab	ole roc	om th	ermost	at
Time and temperature control to heating Load/wea					compens	sation				Ū	Optimum start control
Time and temperature control to hot w	vater	Cylinder th	nermos	tat and pro	grammer	/timer						Comł	oinati	on Boile	er
Heating zone values						Fitted		Not required
Hot water zone valves						Fitted		Not required
						Fitted		Not required						ed be
						Fitted		Not required
													Provide	bd hd
															. u

The system has been flushed and cle	aned in accordance	ce with BS759	33 and	boiler mani	ufacturer	's instr	uctions							Ye	es
What system cleaner was used?
What inhibitor was used?										Qu	antii	iy			lit	res
Has a primary water system filter been	n installed?										Yes			Ν	lo
CENTRAL HEATING MODE measure	e and record:
Gas rate				n	n³/hr			OR							fť	³/hr
Burner operating pressure (if applicab	vle)			n	nbar	(	OR Gas i	nlet pre	essure						m	bar
Central heating flow temperature																°C
Central heating return temperature																°C
COMBINATION BOILERS ONLY
Is the installation in a hard water area	(above 200ppm)	?								·	Yes			N	lo
If yes, and if required by the manufact	turer, has a water	scale reducer	been f	fitted?							Yes			N	lo
What type of scale reducer has been	fitted?														-
DOMESTIC HOT WATER MODE Me	asure and Record	•
Gas rate				n	n³/hr			OR							ff	³/hr
Burner operating pressure (at maximum rate)			mbar OR Gas i					nlet pressure at maximum rate					mba
						( Ous I				indic						°C
Hot water has been checked at all out	tlete								Voc		Tom	porati				ہ
Water flow rate									163		Terri	Jerall			1/r

															-
The condensate drain has been instal	led in accordance	with the man	ufactur	er's instruc	tions and	d/or BS	65546/BS	6798						Ye	es
ALL INSTALLATIONS
Record the following:	At max. rate:		C	0		ppm	AND	CO/	CO₂			Ratio	2
	At min. rate: (v	where possibl	e) (	0		ppm	AND	CO/	CO₂			Ratio	2
The heating and hot water system cor	mplies with the ap	propriate Buil	ding Re	egulations						Yes No reaction of the stress of t
The boiler and associated products ha	ave been installed	and commiss	sioned i	in accordar	nce with t	the ma	nufacture	er's ins	tructions					Ye	es
The boiler and associated products have been installed and commissioned in accordance with the manufacturer's instructions Yes The operation of the boiler and system controls have been demonstrated to and understood by the customer Yes
The manufacturer's literature, includin	ig Benchmark Che	ecklist and Se	rvice R	ecord, has	been ex	plained	d and left	with th	e custom	er				Ye	es
Commissioning Engineer's Signature
Customer's Signature
(To confirm satisfactory demonstration	and receipt of m	anufacturer's	literatu	re)											Image: Image
				.,						_	7
*All installations in England and Wales	must be notified t	o Local Autho	rity Bui	ilding Contr	rol (LABC	C) eithe	er directly	or thro	ough a		De	?//(	://	ma	r	r

All Installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A Building Regulations Compliance Certificate will then be issued to the customer.

Page 59

SERVICE RECORD

It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.

Service Provider

Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer's instructions. Always use the manufacturer's specified spare part when replacing controls.

SERVICE 01				Date:	SER	VICE 02	Date:
Engineer name:					Engineer	name:	I
Company name:						Company name:
Telephone No:						Telephone No:
Gas safe	register No:			Gas safe register No:
	At max. rate:	CO ppm	AND	CO₂ %		At max. rate:	CO ppm	AND	CO ₂ %
Record:	At min. rate: (Where Possible)	CO ppm	AND	CO ₂ %	Record:	At min. rate: (Where Possible)	CO ppm	AND	CO ₂ %
Commen	s:				Commen	ts:

Signature					Signature	9
SER				Date:		VICE 04			Date:
Engineer	name.				Engineer	name.
Company	name:				Company	v name:
Telenhon	No:				Telephon	e No:
Gas safe	register No ^.				Gas safe	register No:
Sus sale	At max_rate	CO nom		CO2 %		At max_rate:	CO nom		CO2 %
Record:	At min rate: (Where Describe)			CO2 %	Record:	At min rate: (Where Docsible)			CO2 %
Commen	s. min. rate. (where rossible)			002 /0	Commen	te.			002 /0
Commen	.5.

Signature					Signature
Signature				-
SER	VICE 05			Date:		VICE 06			Date:
Engineer	name:				Engineer name:
Company	name:				Company name:
Telephon	e No:				Telephon	Telephone No:
Gas safe	register No:				Gas safe register No:
Booord	At max. rate:	CO ppm	AND	CO2 %	Boord	At max. rate:	CO ppm	AND	CO2 %
Record.	At min. rate: (Where Possible)	CO ppm	AND	CO2 %	Recolu.	At min. rate: (Where Possible)	CO ppm	AND	CO2 %
Commen	is:				Commen	ts:


Signature					Signature	9
				Data					Data
SERVICE U/				Date:	Эск		Date:
Engineer	name:				Engineer	name:
Company	name:				Company name:
Telephon	e No:				Telephone No:
Gas safe	register No:				Gas safe	register No:
Record.	At max. rate:	CO ppm	AND	CO₂ %	Record	At max. rate:	CO ppm	AND	CO2 %
	At min. rate: (Where Possible)	CO ppm	AND	CO₂ %		At min. rate: (Where Possible)	CO ppm	AND	CO ₂ %
Commen	S:				Commen	ts:


Signature					Signature	2
SERVICE 09 Date:				Date:	SER	VICE 10		Date:
Engineer	name:				Engineer	name:		I
Company name:
Telephone No:
Gas safe	register No				Gas safe	register No:
545 3416	At max_rate	CO nom		CO2 %		At max_rate:	CO nom		CO2 %
Record:	At min_rate: (Mhore Bossible)				Record:
Commen	C. IIIII. Idle. (Where Possible)	phin	AND	002 70		te:	phin		002 70
Commen						lið.
					\| \|
Signature					Ciarat
Signature						5

*All installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A Building Regulations Compliance Certificate will then be issued to the customer. Installation & Servicing instructions ATAG iC-Range

Page 60

مت ATAG Heating Technology Ltd. • 47 Castle Street • Reading • Berkshire RG1 7SR م Phone: 0800 254 5061 • E-mail: info@atagheating.co.uk • Internet: www.atagheating.co.uk

atag iC 24, iC 28, iC 36, iC 40, iC Economiser 27 User guide

Installation & Servicing Instructions

Explanation of the Control Panel & Buttons

Contents

1 Introduction

When delivering the boiler, give the customer clear instructions concerning its use; present the customer with the user's manual and warranty card.

Legislation and Regulations.

The Benchmark Scheme

Children being supervised not to play with the appliance.

Following maintenance or other activities; always check the installation of all parts through which gas flows (using leak detection spray).

Technical specifications Natural gas

Technical specifications Propane (3P)

4 Dimensions

Delivery package

Boiler description

7 Boiler photo components list

TAG iC

1 Heat exchanger

Install the boiler in a boiler room in accordance to the actual local regulations BS5440-2:2009.

8 1 Wall frame

9.1 Central heating system

The boiler is NOT equipped with a built-in internal filter.

9.2 Expansion vessel

The (additional) expansion vessel should be connected as closely as possible in the return pipe near the boiler.

9.3 Water quality

Installation:

Water quality in DHW facility

Water type definition:

9.4 Heating systems with plastic pipes

9.5 Gas connection in general

9.5.1 Natural gas connection (NG)

9.5.2 Propane gas connection (LPG)

Installing of a LPG installation should only be done by a registered LPG installer.

9.5.3 House pressure regulator

9.5.4 Dimensioning of the low pressure gas line

9.5.5 De-aerating the LPG tank

9.6 Hot water supply

9.7 Condensation drain pipe

Condensate pipework.

Routing of the pipework,

Internal pipework

Use of a condensate pump (to an internal termination):

External pipework

Unheated internal areas:

Draining of the condensation water to the external rain guttering is not permitted in view of the danger of freezing.

9.8 Flue gas exhaust system

The ATAG iC boiler as described in this manual is NOT suitable for a combined flue system.

9.8.1 Flue terminal locations

The flue must be terminated in a place not likely to cause a nuisance.

9.8.2 Dimensioning of the flue gas and air intake duct

Flue dimensions

Fitting the flue

99 Fitting the boiler onto the boiler frame

A Lift the boiler only by the boilers case.

Lifting and carrying precautions:

Fitting the nuts:

Fitting expansion vessel hose:

Fitting siphon:

10 Electrical connection

10.1 One controller, OpenTherm and BUS connection (blue)

10.2 Room thermostat volt free connection (black)

10.3 ATAG Central Heating volt free timer connection (white)

10.4 ATAG Hot Water volt free timer connection (white)

10.5 DHW sensor connection (yellow)

10.6 ATAG Outside sensor (orange)

10.7 230V Control Block (230V live output)

10.8 230V Control Block (SwL Switched live)

10.9 Electrical diagram

Filling system

11.1 Hot water supply

DHW controls (combination boilers)

CH controls

12.1 Controls and explanation of the functions

Hot water

Central heating

Boiler information

Reset button

Ancillary functions:

13 Commissioning the boiler

Waterpressure