ariston Clas HE R12 User guide

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Country of destination GB, IE

Gas red condensing wall hung boiler

G.C.N : 41-116 - 30 (12 kW) G.C.N : 41-116 - 31 (18 kW) G.C.N : 41-116 - 32 (24 kW)

CLAS HE R 12 CLAS HE R 18 CLAS HE R 24

overview

INDEX

Overview

General Information ........................................................... 3

Advice for the Installer ....................................................... 4

CE Labelling ........................................................................... 4

Data Plate Symbols ............................................................. 4

Safety Regulations ..............................................................5

Product description

Control Panel.........................................................................6

Overall View ........................................................................... 7

Overall Dimension .............................................................. 8

Minimum Clearances .........................................................8

Technical Information ........................................................ 9

Installation

Reference Standards ........................................................11

Installing the Boiler ........................................................... 17

Gas Connection ..................................................................18

Central heating Connection ..........................................18

Instructions for Opening the Casing and Performing

an Internal Inspection ...................................................... 19

Connecting the Flue ......................................................... 21

Fitting the Coaxial Flue (Ø 60/100 Horizontal) ........22

Fitting the 5” Flue (Ø 80/125 Horizontal / Vertical)

Fitting the Coaxial Flue (Ø 60/100 Vertical) .............. 24

Fitting the Twin Pipe (Ø 80/80) .....................................25

Table of Flue Gas Exhaust Duct Lengths ...................27

Electrical Connections .....................................................29

Peripheral Unit Connection ...........................................29

Electrical Diagram .............................................................30

Wiring diagrams .................................................................31

Settings - Adjustment - Problem Identication Menus

Accessing the Menus .......................................................42

Maintenance

General Comments ...........................................................49

General Access ...................................................................50

Electrical Unit ......................................................................51

Hydraulic Unit ..................................................................... 53

Burner Unit ..........................................................................55

Annual Maintenance ........................................................ 60

Benchmark Commissioning Checklist .......................61

Benchmark Service Interval Record ............................62

Spare Parts Short List .......................................................61

Commissioning

Initial Preparation .............................................................. 35

Electricity Supply ...............................................................35

Filling the Heating System .............................................35

Gas Supply ...........................................................................35

Water Treatment ................................................................35

First Igniton Operation .................................................... 36

Ignition procedure ............................................................ 37

Test Function and Combustion Analysis ...................39

AUTO Function ...................................................................40

Boiler Protection Devices

Boiler Protection Devices ...............................................41

Anti-Frost Device ...............................................................41

Table Summarising Error Codes ...................................41

overview

These instructions are suitable for CLAS HE R boilers : Do not forget the Log Book!

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 England & Wales. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations England & Wales 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.

To The Installer

As part of the commissioning of this appliance it is vital that the Log Book is completed and given to the Householder. Please ensure that your customer is aware of the importance of keeping the Log Book safe as a record of the installation and the appliance service history.

Please ensure that your customer is aware of the correct operation of the system, boiler and controls.

MTS recommend the use of protective clothing, when installing and working on the appliance i.e. gloves.

CUSTOMER CARE

MTS, as a leading manufacturer of domestic and commercial water heating appliances is committed to providing high quality products and a high quality after sales service. Advice on installation or servicing can also be obtained by contacting the MTS Technical and Customer Service Departments at High Wycombe. TECHNICAL DEPARTMENT CUSTOMER SERVICE DEPARTMENT Tel: 0870 241 8180 Tel: 0870 600 9888 Fax: 01494 459775 Fax: 01494 459775

GUARANTEE

The manufacturer’s guarantee is for 2 years from the date of purchase. The guarantee is invalidated if the appliance is not installed in accordance with the recommendations made herein or in a manner not approved by the manufacturer. To assist us in providing you with an ecient after sales service, please return the guarantee registration card enclosed with the boiler without delay.

CAUTION

In the United Kingdom, installation, start-up, adjustments and maintenance, must be performed by a competent person only, in accordance with the current Gas Safety (Installation & Use) Regulations and the instructions provided.

In the Republic of Ireland, the installation and initial start up of the appliance must be carried out by a Competent Person in accordance with the current edition of I.S.813 “Domestic Gas Installations”, the current Buidling Regulations, reference should also be made to the current ETCI rules for electrical installation.

All CORGI registered installers carry a CORGI ID card, and have a registration number. Both should be recorded in your boiler Log Book. You can check your installer is CORGI registered by calling CORGI directly on:- 0800 915 0485.

Improper installation may cause damage or injury to individuals, animals and personal property for which the manufacturer will not be held liable. To ensure ecient and safe operation it is recommended that the boiler is serviced annually by a competent person.

If it is known that a fault exists on the appliance, it must not be used until the fault has been corrected by a competent person.

This instruction booklet is especially designed for appliances installed in the UK and the Republic of Ireland

overview

Gas

MAX

MIN

Gas

mbar

14 15

20 21 22

Advice for the installer

The installation and rst ignition of the boiler must be performed by qualied personnel in compliance with current national regulations regarding installation, and in conformity with any requirements established by local authorities and public health organisations. After the boiler has been installed, the installer must ensure that the end user receives the declaration of conformity and the operating manual, and should provide all necessary information as to how the boiler and the safety devices should be handled.

These appliance are designed for use on open vented central heating systems. A kit is available to allow the boiler to be used on a sealed system. These appliances are designed for domestic use only. It should be connected to a heating system and a distribution network for domestic hot water, both of which must be compatible with its performance and power levels. The use of the appliance for purposes other than those specied is strictly forbidden. The manufacturer cannot be held responsible for any damage caused by improper, incorrect and unreasonable use of the appliance or by the failure to comply with the instructions given in this manual. Installation, maintenance and all other interventions must be carried out in full conformity with the governing legal regulations and the instructions provided by the manufacturer. Incorrect installation can harm persons, animals and possessions; the manufacturing company shall not be held responsible for any damage caused as a result. The boiler is delivered in a carton. Once you have removed all the packaging, make sure the appliance is intact and that no parts are missing. If this is not the case, please contact your supplier. Keep all packaging material (clips, plastic bags, polystyrene foam, etc.) out of reach of children as it may present a potential hazard. In the event of a fault and/or malfunction, turn the appliance o, turn o the gas cock and do not attempt to repair it yourself. Contact a qualied professional instead. Before any maintenance or repair work is performed on the boiler, make sure you have disconnected it from the electricity supply by switching the external bipolar switch to the “OFF” position and removing the fuse. All repairs, which should only be performed using original spare parts, should be carried out by a qualied professional. Failure to comply with the above instructions could compromise the safety of the appliance and invalidate all liability on the part of the manufacturer. In the event of any maintenance or other structural work in the immediate vicinity of the ue or ue gas exhaust devices and their accessories, switch the appliance o by switching the external bipolar switch to the “OFF” position and shutting o the gas control valve. When the work has been completed, a

qualied technician must check the eciency of the ue and the devices. Turn the boiler o and turn the external switch “OFF” to clean the exterior parts of the appliance. Clean using a cloth dampened with soapy water. Do not use aggressive detergents, insecticides or toxic products. If the appliance is used in full compliance with current legislation, it will operate in a safe, environmentally-friendly and cost-ecient manner.

If using kits or optional extras, make sure they are authentic.

CE labelling

The CE mark guarantees that the appliance conforms to the following directives:

90/396/CEE

relating to gas appliances

2004/108/CEE

relating to electromagnetic compatibility

92/42/CEE

relating to energy eciency

2006/95/CEE

relating to electrical safety

Legend :

1. Brand

Symbols used on the data plate

2. Manufacturer

3. Boiler model - Serial number

4. Commercial reference

5. Certication number

6. Destination country - gas category

7. Gas setting

8. Installation type

9. Electrical data

11. Maximum heating pressure

12. Boiler type

13. NOx class / Eciency

14. Input rating nominal heating

15. Power ouput heating

17. Boiler output eciency

18. Input rating nominal DHW

19. Gases which may be used

20. Minimum ambient temperature for use

21. Max. central heating temperature

Safety regulations

Key to symbols:

Failure to comply with this warning implies the risk of personal injury, in some circumstances even fatal. Failure to comply with this warning implies the risk of damage, in some circumstances even serious, to property, plants or animals.

Install the appliance on a solid wall which is not subject to vibration.

Noisiness during operation.

When drilling holes in the wall for installation purposes, take care not to damage any electrical wiring or existing piping.

Electrocution caused by contact with live wires. Explosions, res or asphyxiation caused by gas leaking from damaged piping. Damage to existing installations. Flooding caused by water leaking from damaged piping.

Perform all electrical connections using wires which have a suitable section.

Fire caused by overheating due to electrical current passing through undersized cables.

Protect all connection pipes and wires in order to prevent them from being damaged.

Electrocution caused by contact with live wires. Explosions, res or asphyxiation caused by gas leaking from damaged piping. Flooding caused by water leaking from damaged piping.

Make sure the installation site and any systems to which the appliance must be connected comply with the applicable norms in force.

Electrocution caused by contact with live wires which have been installed incorrectly. Damage to the appliance caused by improper operating conditions.

Use suitable manual tools and equipment (make sure in particular that the tool is not worn out and that its handle is xed properly); use them correctly and make sure they do not fall from a height. Replace them once you have nished using them.

Personal injury from falling splinters or fragments, inhalation of dust, shocks, cuts, pricks and abrasions. Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Use electrical equipment suitable for its intended use (in particular, make sure that the power supply cable and plug are intact and that the parts featuring rotary or reciprocating motions are fastened correctly); use this equipment correctly; do not obstruct passageways with the power supply cable, make sure no equipment could fall from a height. Disconnect it and replace it safely after use.

Personal injury caused by falling splinters or fragments, inhalation of dust, knocks, cuts, puncture wounds, abrasions, noise and vibration. Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Make sure any portable ladders are positioned securely, that they are suitably strong and that the steps are intact and not slippery and do not wobble when someone climbs them. Ensure someone provides supervision at all times.

Personal injury caused by falling from a height or cuts (stepladders shutting accidentally).

Make sure any rolling ladders are positioned securely, that they are suitably strong, that the steps are intact and not slippery and that the

overview

ladders are tted with handrails on either side of the ladder and parapets on the landing.

Personal injury caused by falling from a height.

During all work carried out at a certain height (generally with a dierence in height of more than two metres), make sure that parapets are used to surround the work area or that individual harnesses are used to prevent falls. The space where any accidental fall may occur should be free from dangerous obstacles, and any impact upon falling should be cushioned by semi-rigid or deformable surfaces.

Personal injury caused by falling from a height.

Make sure the workplace has suitable hygiene and sanitary conditions in terms of lighting, ventilation and solidity of the structures.

Personal injury caused by knocks, stumbling etc.

Protect the appliance and all areas in the vicinity of the work place using suitable material.

Damage to the appliance or surrounding objects caused by falling splinters, knocks and incisions.

Handle the appliance with suitable protection and with care.

Damage to the appliance or surrounding objects from shocks, knocks, incisions and squashing.

During all work procedures, wear individual protective clothing and equipment.

Personal injury caused by electrocution, falling splinters or fragments, inhalation of dust, shocks, cuts, puncture wounds, abrasions, noise and vibration.

Place all debris and equipment in such a way as to make movement easy and safe, avoiding the formation of any piles which could yield or collapse.

Damage to the appliance or surrounding objects from shocks, knocks, incisions and squashing.

All operations inside the appliance must be performed with the necessary caution in order to avoid abrupt contact with sharp parts.

Personal injury caused by cuts, puncture wounds and abrasions.

Reset all the safety and control functions aected by any work performed on the appliance and make sure they operate correctly before restarting the appliance.

Explosions, res or asphyxiation caused by gas leaks or an incorrect ue gas exhaust. Damage or shutdown of the appliance caused by out-of-control operation.

Before handling, empty all components that may contain hot water, carrying out any bleeding if necessary.

Personal injury caused by burns.

Descale the components, in accordance with the instructions provided on the safety data sheet of the product used, airing the room, wearing protective clothing, avoid mixing dierent products, and protect the appliance and surrounding objects.

Personal injury caused by acidic substances coming into contact with skin or eyes; inhaling or swallowing harmful chemical agents. Damage to the appliance or surrounding objects due to corrosion caused by acidic substances.

If you detect a smell of burning or smoke, keep clear of the appliance, disconnect it from the electricity supply, open all windows and contact the technician.

Personal injury caused by burns, smoke inhalation, asphyxiation.

product description

8 7

Control panel

Legend :

1. Display

eset button

2. R

3. Red indicator lockout light

4. Button

5. Temperature regulation knob

6. Esc button

7. Menu / OK button (Programming key)

8. Button

9. ON/OFF button / Green indicator ON/OFF

10. Blue indicator burner ON

11. Green indicator A

12. A

uto button (To activate Thermoregulation)

uto function

Overall view

product description

1. Central heating return

2. Central heating ow

3. Burner

4. Detection electrode

5. C.H. Return temperature probe

6. C.H. Flow temperature probe

7. Manual air vent

8. Gas valve

9. Trap

10. Electrical box

11. Gas tap

12. Display box

13. Electrical connection box

14. Modulating fan

15. Ignition electrodes

16. Ignitor

17. Thermal fuse

18. Combustion analysis test point

19. Flue connector

product description

200

120

122

595

161

292 (12-18-24 kW) 362 (30 kW)

135

162

665

44.5

450

300

250

Overall Dimensions

Minimum clearances

In order to allow easy access to the boiler for maintenance operations, the boiler must be installed in accordance with the clearances stated.

Technical Data

GENERAL

NOTE

Model CLAS HE R

CE Certication (pin)

0085BR0347

Boiler type

B23-C13-C33-C43-C53-C83

POWER SPECIFICATIONS

Max/min nominal caloric ow rate (Pci) Qn

12.0/3.0

18.0/4.5

Max/min nominal caloric ow rate (Pcs) Qn

13.3/3.3

20.0/5.0

Max/min power output (80°C-60°C) Pn

11.7/2.8

17.6/4.3

Max/min power output (50°C-30°C) Pn

12.9/3.2

19.1/4.7

Combustion eciency (of ue gas)

97.8

97.6

Nominal caloric ow rate eciency (60/80°C) Hi/Hs

97.6/87.9

97.7/88.0

Nominal caloric ow rate eciency (30/50°C) (condensation) Hi/Hs

107.1/96.4

106.2/95.6

Eciency at 30% at 30°C (condensation) Hi/Hs

108.7/97.9

107.8/97.1

Eciency at 30% at 47°C Hi/Hs

99.2/89.3

101.9/91.8

Minimum caloric ow rate eciency (60/80°C) Hi/Hs

94.3/84.9

94.7/85.3

Eciency rating (dir. 92/42/EEC)

stars

****

Sedbuk Band Rating

band/%

A / 90.1

Loss when stopped (∆T = 50°C)

0.3

0.2

Loss of burner gas when operating

2.2

2.4

EMISSIONS

Available air pressure

Pa5391

NoX class (less than 70mg/kWh)

class55

Flue gas temperature (G20) (80°C-60°C)

°C6569

CO2 content (G20) (80°C-60°C)

9.0

9.2

CO content (0%O2) (80°C-60°C)

ppm

< 80

< 170

O2 content (G20) (80°C-60°C)

4.5

4.2

Maximum ue gas ow (G20) (80°C-60°C)

Kg/h

19.8

29.1

Excess air (80°C-60°C)

%2725

HEATING

CIRCUIT

Minimum/Maximum heating pressure

bar

0,2/3

Min/max heating temperature (high temperature range)

°C

35/82

Min/max heating temperature (low temperature range)

°C

20/45

ELECTRICAL

Power supply frequency/voltage

V/Hz

230/50

Total electrical power absorbed

135

142

Minimum ambient temperature for use

°C+5+5

Protection level for the electrical appliance

X5D

Weightkg23

product description

GENERAL

NOTE

Model CLAS HE R

CE Certication (pin)

0085BR0347

Boiler type

B23-C13-C33-

C43-C53-C83

POWER SPECIFICATIONS

Max/min nominal caloric ow rate (Pci) Qn

24.6/5.3

Max/min nominal caloric ow rate (Pcs) Qn

27.3/5.9

Max/min power output (80°C-60°C) Pn

24.1/5.0

Max/min power output (50°C-30°C) Pn

26.0/5.4

Combustion eciency (of ue gas)

97.5

Nominal caloric ow rate eciency (60/80°C) Hi/Hs

98.2/88.4

Nominal caloric ow rate eciency (30/50°C) (condensation) Hi/Hs

105.7/95.2

Eciency at 30% at 30°C (condensation) Hi/Hs

109.0/98.1

Eciency at 30% at 47°C Hi/Hs

103.7/93.4

Minimum caloric ow rate eciency (60/80°C) Hi/Hs

94.3/84.9

Eciency rating (dir. 92/42/EEC)

stars

****

Sedbuk Band Rating

band/%

A / 90.3

Loss when stopped (∆T = 50°C)

0.2

Loss of burner gas when operating

2.5

EMISSIONS

Available air pressure

137

NoX class (less than 70mg/kWh)

class

Flue gas temperature (G20) (80°C-60°C)

°C

CO2 content (G20) (80°C-60°C)

9.3

CO content (0%O2) (80°C-60°C)

ppm

< 180

O2 content (G20) (80°C-60°C)

4.0

Maximum ue gas ow (G20) (80°C-60°C)

Kg/h

39.4

Excess air (80°C-60°C)

HEATING

CIRCUIT

Minimum/Maximum heating pressure

bar

0,2/3

Min/max heating temperature (high temperature range)

°C

35/82

Min/max heating temperature (low temperature range)

°C

20/45

ELECTRICAL

Power supply frequency/voltage

V/Hz

230/50

Total electrical power absorbed

144

Minimum ambient temperature for use

°C

Protection level for the electrical appliance

X5D

Weightkg23

Technical Data

Reference Standards

In the United Kingdom, the installation and initial start-up of the boiler must be by a CORGI registered installer in accordance with the installation standards currently in eect, as well as with any and all local health and safety standards i.e. CORGI.

In the Republic of Ireland the installation and initial start-up of the appliance must be carried out by a Competent Person in accordance with the current edition of I.S.813 “Domestic Gas Installations” and the current Building Regulations, reference should also be made to the current ETCI rules for electrical installation.

The installation of this appliance must be in accordance with the relevant requirements of the Local Building Regulations, the current I.E.E. Wiring Regulations, the by-laws of the local authority, in Scotland, in accordance with the Building Standards (Scotland) Regulation and Health and Safety document No. 635, “Electricity at Work Regulations 1989” and in the Republic of Ireland with the current edition of I.S. 813 and the Local Building Regulations (IE).

C.O.S.H.H.

Materials used in the manufacture of this appliance are non-hazardous and no special precautions are required when servicing.

Codes of Practive

Installation should also comply with the following British Standards Code of Practice:

BS 7593:1992 Treatment of water in domestic

hot water central heating systems

BS 5546:1990 Installation of hot water supplies

for domestic purposes BS 5440-1:2008 Flues BS 5440-2:2008 Air supply BS 5449:1990 Forced circulation hot water

systems BS 6798:2000 Installation of gas red hot

water boilers of rated input not

exceeding 70kW BS 6891:1989 Installation of low pressure gas

pipes up to 28mm BS 7671:2001 IEE Wiring Regulations BS 4814:1990 Specication for expansion

vessels BS 5482:1994 Installation of L.P.G. Domestic heating compliance

guide

and in the Republic of Ireland in accordance with the following codes of practice:

I.S. 813 Domestic Gas Installations

installation

Avoid installing the boiler where the air inlet can be polluted by chemical products such as chlorine (swimming pool area), or ammonia (hair dresser), or alkalin products (launderette).

Flue

Detailed information on ue assembly can be found in the “Connecting the Flue” section. The boiler must be installed so that the ue terminal is exposed to the free passage of external air at all times and must not be installed in a place likely to cause nuisance. It must not be allowed to discharge into another room or space such as an outhouse or closed lean-to.

Condensing boilers have a tendency to form a plume of water vapour from the ue terminal due to the low temperature of the ue gases. The terminal should therefore be located with due regard for the damage or discolouration that may occur to building within the vicinity and consideration must also be given to adjacent boundaries, openable windows etc. The minimum acceptable clearances are shown on page

12.

installation

The minimum acceptable clearances are shown below:

- A Directly above or below an opening, window, etc 300 mm

- B Horizontally to an opening, window, etc 300 mm

- C Below gutters, soils pipes or drain pipes 75 mm

- D Below eaves 200 mm

- E From vertical drain pipe or soil pipe 75 mm

- F From internal or external corner 300 mm

- G Above ground, roof or balcony level 300 mm

- H From a surface facing the terminal 2500 mm

- I From a terminal facing a terminal 2500 mm

- J Vertically from a terminal on the same wall 1500 mm

- K Horizontally from an terminal on the same wall 300 mm

- L Fixed by vertical ue terminal

Note: the flue must Not be iNstalled iN a place likely to

cause a NuisaNce aNd positioNed to eNsure that products of combustioN do Not discharge across a bouNdary

It may be necessary to protect the terminal with a guard, if this is the case it will be necessary to purchase a stainless steel terminal guard. Reference should be made to the Building Regulations for guidance.

Ventilation

The room in which the boiler is installed does not require specic ventilation. If the boiler is installed in a cupboard or compartment, ventilation is not required for cooling purposes.

Gas Supply

The gas installation and tightness testing must be in accordance with the requirements of BS6891. Ensure that the pipe size is adequate for demand including other gas appliances on the same supply.

Electrical Supply

The appliance requires an earthed 230V - 50 Hz supply and must be in accordance with current I.E.E. regulations. It must also be possible to be able to completely isolate the appliance electrically. Connection should be via a 3 amp double pole fused isolating switch with contact separation of at least 3mm on both poles. Alternatively, a fused 3 amp, 3 pin plug and unswitched socket may be used, provided it is not used in a room containing a bath or shower, it should only supply the appliance.

Automatic by pass

Ariston recommend that an automatic by pass is installed a minimum of 1.5 metres away from the boiler to ensure the minimum required ow rate is achieved at all times. Additionally the design of the system and its controls must ensure that an adequate temperature dierential is met, and should be such to prevent boiler cycling.

Feed and vent pipework

Heating Circuit

Boiler

15mm (Min.) Automatic By-Pass

Pump

2M Minimum

150mm Max.

500mm Minimum Height

22mm (Min.) Vent Pipe

15mm (Min.) Cold Feed

Cylinder

Return

Flow

Return

Flow

The feed and vent pipework from the boiler to the F & E (Feed & Expansion) tank should be congured as shown in the g. below.

installation

mWH

l/h

100

200

300

400 500 600 700 800 900

1000 1100

1200

1300

1400

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

12-18 kW

12 kW

18 kW

821 l/h = 20 Δ @ 19.1 kW

555 l/h = 20 Δ @ 12.9 kW

1.3 mWH

2.65 mWH

24 kW

1118 l/h = 20 Δ @ 26.0 kW

3.7 mWH

Note:

• The distance between the cold feed and the open

vent pipe shall be no more than 150mm.

• The cold feed must be inverted as shown.

• The open vent pipe must be a minimum of 22mm

diameter.

• The cold feed pipe must be a minimum of 15mm

diameter.

• The cold feed and open vent pipes must rise

continuously and be unrestricted.

• The minimum distance from the top of the boiler

to the bottom of the F & E tank shall be no less than 2m. Whilst the maximum distance shall be not more than 27m.

• The distance between the bottom of the F & E

tank and the highest point of the open vent must be no less than 500mm.

• The ow and return pipes from the boiler must

rise continuously and be unrestricted.

• The supply of water to the F & E tank should be

taken from the mains water supply via a suitable oat operated valve. While the supply from the F & E tank to the boiler/heating circuit (via the cold feed) shall be unrestricted.

• The F & E tank must be adequately supported

and installed in accordance with relevant Building Regulations.

Pressure Loss Graphs through the boilers

Pump specication

The pump should be tted on the ow pipe from the boiler and have isolating valves each side. A variable duty pump should be set to give a temperature dierential of no greater than 20ºC.

Draining tap

A draining tap must be provided at all the lowest points of the system which will allow the entire system to be drained. A drain tap must also be installed on the ow and return pipes immediately above the boiler to ensure complete draining of the primary ow and return is possible. Drain taps shall be to the current standard of BS

2879.

Sealed water systems

A sealed system kit is available from Ariston. Installation instructions are supplied with the kit.

Flushing and Water Treatment

The boiler is equipped with a stainless steel heat exchanger.

The detailed recommendations for water treatment are given in BS 7593:1992 (Treatment of water in domestic hot water central heating systems); the following notes are given for general guidance.

If the boiler is installed on an existing system, any unsuitable additives must be removed.

Under no circumstances should the boiler be red before the system has been thoroughly ushed; the ushing procedure must be in line with BS 7593:1992.

We highly recommend the use of a ushing detergent appropriate for the metals used in the circuit. These include cleansers produced by Fernox BetzDearbon, whose function is to dissolve any foreign matter that may be in the system.

In hard water areas or where large quantities of water are in the system the treatment of water to prevent premature scaling of the main exchanger is necessary.

The formation of scale compromises the eciency of the thermic heat exchanger because small areas of scale cause a high increase in the temperature of the metallic walls and therefore add to the thermal stress of the heat exchanger.

Demineralised water is more aggressive so in this situation it is necessary to treat the water with an appropriate corrosion inhibitor.

Any treatment of water by additives in the system for frost protection or for corrosion inhibition has to be absolutely suitable for all metals used in the circuit.

The use of a corrosion inhibitor in the sysem such as Fernox MB-1, BetzDearborn Sentinel X100 or Fernox System Inhibitor is recommended to prevent corrosion (sludge) damaging the boiler and system.

If anti-freeze substances are to be used in the system, check carefully that they are compatible with the metals used in the circuit.

MTS suggests the use of suitable anti-freeze products such as Fernox ALPHI 11, which will prevent rust and incrustation taking place. Periodicaly check the pH balance of the water/antifreeze mixture of the boiler circuit and replace it when the amount measured is out of the range stipulated by the manufacturer (7 < pH < 8). DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE

In under-oor systems, the use of plastic pipes without protection against penetration of oxygen through the walls can cause corrosion of the systems metal parts (metal piping, boiler etc), through the formation of oxides and bacterial agents.

installation

To prevent this problem it is necessary to use pipes with an “oxygen proof barrier”, in accordance with standards DIN 4726/4729. If pipes of this kind are

not used, keep the system separate by installing heat exchangers of those with a specic system water treatment.

IMPORTANT Failure to carry out the water treatment procedure will invalidate the appliance guarantee.

System Controls

The boiler is electrically controlled and is suitable for most modern electronic time and temperature controls. The addition of such external controls can be benecial to the ecient operation of the system. The boiler connections for external controls are 240V. MTS supply a range of wired and wireless system controls. Contact your supplier for more details.

Location

The boiler can be installed on any suitable internal wall (suitable sound proong may be required when installing onto a stud partition wall). Provision must be made to allow for the correct routing of the ue and siting of the terminal to allow the safe and ecient removal of the ue products. A compartment or cupboard may be used provided that it has been built or modied for this purpose. It is not necessary to provide permanent ventilation for cooling purposes. Detailed recommendations are given in BS 5440 Part 2. If it is proposed that it is to be installed in a timber framed building then reference should be made to British Gas Document DM2, IGE/UP/7 or advice sought from CORGI.

Where a room sealed appliance is installed in a room containing a bath or shower, the appliance and any electrical switch or appliance control, utilising mains electricity should be situated specically in accordance with current IEE Wiring Regulations.

For unusual locations, special procedures may be necessary. BS 6798:2000 gives detailed guidance on this aspect.

installation

trap

Condensate Discharge

The condensate discharge hose from the boiler must have a continuous fall of 2.5o and must be inserted by at least 50mm into a suitable acid resistant pipe - e.g. plastic waste or overow pipe. The condensate discharge pipe must have a minimum diameter of 22mm, must have a continuous fall and preferably be installed and terminated to prevent freezing. The discharge pipe must be terminated in a suitable position:

i) Connecting into an internal soil stack (at least 450mm above the invert of the stack). A trap giving a water seal of at least 75mm must be incorporated into the pipe run, there also must be an air break upstream of the trap. ii) Connecting into the waste system of the building such as a washing maching or sink trap. The connection must be upstream of the washing machine/sink. If the connection is downstream of the waste trap then an additional trap giving a minimum water seal of 75mm and an air break must be incorporated in the pipe run, as above. iii) Terminating into a gully, below the grid level but above the water level iv) Into a soakaway

Note: If any condensate pipework is to be installed externally then it should be kept to a minimum and be insulated with a waterproof insulation and have a continuous fall. The total length of external pipe used should not exceed 3 metres.

Some examples of the type of condensate terminations can be found below.

2. External terminaton of condensate drainage pipe via internal discharge branch (e.g. sink waste) and condensate siphon.

3. External termination of condensate drainage pipe via internal discharge branch (e.g. sink waste

- proprietary tting).

1. Internal termination of codensate drainage pipe to internal stack.

4. External termination of condensate drainage pipe via condensate siphon

Installing the Boiler

Please check that you are familiar with the installation requirement before commencing work (pages 8 - 16).

The installation accessories described in the following list are included in the boiler packaging:

- Hanging bracket

- A paper template (showing the dimensions of

the boiler with 5 mm side clearances)

- Gas isolation valve (compression)

- Washers

- Installation, Servicing and User manual

- Flue gasket

- Fixing screws

installation

Filling the system/condensate discharge

Fill the central heating and bleed air from the system as described in the Commissioning Instructions.

The system should be carefully checked for leaks, as frequent relling could cause premature system corrosion or unnecessary scaling of the heat exchanger.

Pay special attention not to bend the condensate silicone drain pipe is such a way as to interrupt the ow. Please only use drain pipe material compatible with condensate products (refer to BS 6798:2000).

The condensate ow can reach 2 litres/hour because of the acidity of the condensate products (Ph close to 2), take care before operation.

See page 16 for condensate discharge options.

Method of positioning the boiler on the wall

The paper template can be used to ensure the correct positioning of kitchen cabinets etc.

The paper template has to be xed to the wall and used to locate the position of the hanging bracket and the centre for the ue hole. Drill and plug the wall and secure the hanging bracket using the screws provided, ensure the hanging bracket is xed square on the wall. Remove the boiler from its packaging. Place the boiler on the hanging bracket.

ote: the appliaNce must Not be fitted oN a combustible

wall surface.

Connecting the boiler to the system

- Remove the boiler casing as described on page 19

- Remove the cap and connect the gas isolation

valve to the boiler using the washer provided (C) page 18;

installation

Gas connection

Make sure, using the labels on the packaging and the data plate on the appliance itself, that the boiler is in the correct country and that the gas category for which the boiler was designed corresponds to one of the categories available in the country where it will be used. The gas supply piping must be created and measured out in compliance with specic legal requirements and in accordance with the maximum power of the boiler; ensure the gas isolation valve is connected correctly, see drawing opposite. Check that the supplied gas corresponds to the type of gas for which the boiler was designed (see the data plate located on the appliance itself). It is also important to check that the pressure of the gas (methane or LPG) you will be using to feed the boiler is suitable, because if it is insucient the power may be reduced, causing inconvenience for the user.

Central Heating connection

Drain O Cocks

C. Gas Inlet

A. Central Heating Return B. Central Heating Flow

(pipes 22mm)

Note: For IE use 3/4"» + 1/2"

olives provided

Instructions for opening the casing and performing an internal inspection

Before performing any work on the boiler, rst disconnect it from the electrical power supply using the external bipolar switch, removing the fuse and shutting o the gas valve. To access the inside of the boiler, the following is

necessary:

1. Loosen the two screws on the front casing (a), pull

it forwards and unhook it from the upper pins (b)

3. Remove the control panel (c)

4. Unhook the two clips on the combustion chamber

panel and lift o (d).

(a)

installation

(c)

(b)

(d)

installation

Before the boiler is used for the rst time, the trap must be lled with water. To do this, add approximately 1/4 litre of water via the ue outlet before tting the ue system, or unscrew the cap on the trap positioned underneath the boiler, ll it with water and ret it

Warning! Insucient water in the trap can

temporarily cause the ue gas to be expelled

into the surrounding ambient air.

Water circuit diagram

1. C.H. ow temperature probe

2. C.H. return temperature probe

3. Burner

4. Detection electrode

5. Condensate trap

6. Modulating fan

7. Ignition electrodes

8. Thermal fuse

Connecting the Flue

118 mm

See table

118 mm

Flue System The provision for satisfactory ue termination must be made as described in BS 5440-1. The appliance must be installed so that the ue terminal is exposed to outdoor air. The terminal must not discharge into another room or space such as an outhouse or lean-to. It is important that the position of the terminal allows a free passage of air across it at all times. The terminal should be located with due regard for the damage or discolouration that might occur on buildings in the vicinity, it must also be located in a place not likely to cause nuisance. In cold or humid weather water vapour may condense on leaving the ue terminal. The eect of such “steaming” must be considered. If the terminal is less than 2 metres above a balcony, above ground or above a at roof to which people have access, then a suitable stainless steel terminal guard must be tted.

The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specied in Fig. 1.

See table on page 27 & 28

installation

Fig. 1

- A Directly above or below an opening, window, etc 300 mm

- B Horizontally to an opening, window, etc 300 mm

- C Below gutters, soils pipes or drain pipes 75 mm

- D Below eaves 200 mm

- E From vertical drain pipe or soil pipe 75 mm

- F From internal or external corner 300 mm

- G Above ground, roof or balcony level 300 mm

- H From a surface facing the terminal 2500 mm

- I From a terminal facing a terminal 2500 mm

- J Vertically from a terminal on the same wall 1500 mm

- K Horizontally from an terminal on the same wall 300 mm

- L Fixed by vertical ue terminal

Fig. 2

122

installation

150 mm

118

* pente 5 mm par mètre

150

* pente

Warning

The exhaust gas ducts must not be in contact with or close to inammable material and must not pass through building structures or walls made of inammable material. When replacing an old appliance, the ue system must be changed.

Important

Ensure that the ue is not blocked. Ensure that the ue is supported and assembled in accordance with these instructions.

Installation without extension

Fig. 3

Level

Installation with extension

slope

Fitting the Coaxial Flue (Ø 60 / 100 Horizontal)

Contents: 1x Silicone O-Ring (60mm) 1x Elbow (90°) 2x Wall Seals (Internal & External) 1x Flue Pipe including Terminal (1 metre - 60/100) 2x Flue Clamps 4x Screws 2x Seals

Once the boiler has been positioned on the wall, t the rubber ue seal into the internal ue turret (see diagram opposite).

Insert the elbow into the socket and rotate to the required position. Note: It is possible to rotate the elbow 360° on its vertical axis.

Using the ue clamp, seals and screws supplied (Fig

4) secure the elbow to the boiler.

The 1 metre horizontal ue kit (3318073) supplied is suitable for an exact X dimension of 811mm.

Measure the distance from the face of the external wall to the face of the ue elbow (X - Fig 2), this gure must now be subtracted from 811mm, you now have the total amount to be cut from the plain end of the ue.

Level

slope 5 mm per metre

Draw a circle around the outer ue and cut the ue to the required length taking care not to cut the inner ue, next cut the inner ue ensuring that the length between the inner and outer ue is maintained. (Fig 4).

e.g. X = 555mm 811-555 = 256mm (Length to be cut from the plain end of the ue).

Once cut to the required length, ensure that the ue is free from burrs and reassemble the ue. If tting the ue from the inside of the building attach the grey outer wall seal to the ue terminal and push the ue through the hole, once the wall seal has passed through the hole, pull the ue back until the seal is ush with the wall. Alternatively, the ue can be installed from the outside of the building, the grey outer seal being tted last.

Should the ue require extending, the ue connections are push t, however, one ue bracket should be used to secure each metre of ue.

Note: See table for maximum and minimum ue runs.

During use it is possible small quantities of condensate will drip from the end of the terminal. Pay attention when siting the ue termination point.

Applies to all horizontal terminations.

Clamp

180 mm

Total length of vertical kit 1240 mm

Useable length of vertical ue 575 mm*

installation

Seal

Screws

Fitting the 5” Flue (Ø 80 / 125 Horizontal/vertical)

Fig. 5

Fig. 4

Once the boiler has been positioned on the wall, it is necessary to insert the Ø80/125 adaptor (Fig. 5) for both horizontal and vertical ue runs into the boiler ue socket (not supplied with ue kit - Part No 3318095).

Push the adaptor onto the boiler’s ue connection, grease the seals then add extensions or elbows as required, secure the adaptor, using the clamp and screws provided.

To t extensions or elbows it is rst necessary to ensure that the lip seal is tted correctly into the inner ue, once veried, it is simply necessary to push them together, no clamps are necessary to secure the ue components.

Before proceeding to t the ue, ensure that the maximum ue length has not been exceeded (See the tables) and that all elbows and bends have been taken into consideration, the maximum ue length is 10 metres, for each additional 90° elbow 1 metre must be subtracted from the total ue length, and for each 45° bend 0.5 metres must be subtracted from the total ue length (the height of the vertical adaptor and a 45° bend can be seen in Fig.6 and a 90° bend in Fig. 7).

Note: DO NOT cut the vertical ue kit.

Fig. 6

Fig. 7

installation

180 mm

Total length of Vertical Kit 1355 mm

Useable length of Vertical ue 690 mm*

Fitting the Coaxial Flue (Ø 60 / 100 Vertical) Note: See table for maximum and minimum ue runs.

Contents: 1x Silicone O-Ring (60mm) 1x Conical Adaptor (60/100mm) 1x Vertical Flue Kit (80/125mm) 3x Screws

122

Fig. 7

The vertical ue kit is supplied with a specially designed weather proof terminal tted, it can be used either with a at roof or a pitched roof.

The vertical ue kits useable lengths with the pitched roof ashings are indicated in Fig. 7.

Before proceeding to t the ue, ensure that the maximum ue length has not been exceeded (See the tables) and that all elbows and bends have been taken into consideration, the maximum ue length can be found on the table on page 27 & 28. For each additional 90° elbow 1 metre must be subtracted from the total ue length, and for each 45° bend

0.5 metres must be subtracted from the total ue length (the height of the vertical adaptor and a 45° bend can be seen in Fig. 7).

Mark the position of the ue hole in the ceiling and/or roof (see Fig. 7 for distance from wall to the centre of the ue).

Cut a 130mm diameter hole through the ceiling and/or roof and t the ashing plate to the roof.

DO NOT cut the vertical ue kit.

To connect the vertical ue kit directly to the boiler, place the vertical starter kit (Part No. 3318079) (see Fig. 7) onto the exhaust manifold and secure with the clamp, t the vertical adaptor onto the vertical starter kit (note: there is no need to use a clamp to secure this as it is a push t connection), the vertical ue kit must then be inserted through the roof ashing, this will ensure that the correct clearance above the roof is provided as the terminal is a xed height.

Should extensions be required, they are available in 1 metre (Part No. 3318077), 500mm (Part No.

3318078), they must be connected directly to the vertical starter kit before connecting the adaptor to allow the vertical ue kit to be tted. In the event that extension pieces need to be shortened, they must only be cut at the male end and it must be ensured that the inner and outer ue remain ush.

When utilising the vertical ue system, action must be taken to ensure that the ue is supported adequately to prevent the weight being transferred to the appliance ue connection by using 1 ue bracket per extension.

When the ue passes through a ceiling or wooden oor, there must be an air gap of 25mm between any part of the ue system and any combustible material. The use of a ceiling plate will facilitate this. Also when the ue passes from one room to another a re stop must be tted to prevent the passage of smoke or re, irrespective of the structural material through which the ue passes.

Fig. 8

Fitting the Twin Pipe (Ø80 / 80)

Note: See on page 27 for maximum and minimum ue runs.

Where it is not possible to terminate the ue within the distance permitted for coaxial ues, the twin ue pipe can be used by tting a special adaptor to the ue connector and using the aperture for the air intake located on top of the combustion chamber.

installation

the previous section of ue pipe or elbow, check that the o-ring is not dislodged when assembling the ue (greasing the seal will aid assembly).

Twin pipe can also be converted back to coaxial ue to enable vertical termination with a coaxial kit by using the pipe bridge (Twin - Coaxial Adaptor - Part No. 3318089). When running the twin ue pipe vertically.

It is not possible to terminate concentrically horizontally. Termination is only possible with separate air and exhaust terminals. When siting the twin ue pipe, the air intake and exhaust terminals must terminate on the same wall, the centres of the terminals must be a minimum of 280 mm apart and the air intake must not be sited above the exhaust terminal (refer to Fig. 10). The air intake pipe can be run horizontally, however, the terminal and the nal 1 metre of ue must be installed either horizontally or with a slight fall away from the boiler to avoid rain ingress.

It is also strongly recommended that the air intake pipe run be constructed of insulated pipe to prevent condense forming on the outside of the tube.

The maximum permissible ue length for twin ue is dependent on the type of run used (see table on page 28).

For further information relating to ue runs not illustrated, please contact the Technical Department on 0870 241 8180.

Always ensure that the ue is adequately supported, using one ue bracket per extension and avoiding low points. (MTS supply suitable clamps as Part No.

705778). To utilise the air intake it is necessary to:

1) Take the air intake cover o the top of the appliance;

2) Assemble the ange on the header supplied with the boiler;

3) Insert the header on the tube or the elbow up until the lower stop (you do not have to use the washer);

4) Insert the elbow/header in the boiler air intake hole and fasten it with screws.

The twin ue pipes can be tted with or without additional elbows and need no clamps, simply ensure that the black o-ring is inserted in the female end of the ue pipe and push the extension piece fully into

installation

195

105

120

180

Fig. 9

For coaxial systems, the maximum ue lengths, mentioned in the table on page 28 also take into account an elbow. For twin ue systems the maximum ue length, mentioned in the table includes the exhaust gas/air intake terminal.

Twin ue outlets should respect the following instructions: 1- Use the same ø 80 mm ue pipes for the air

intakes and exhaust gas ducts.

2- If you need to insert elbows in the air intake and

exhaust gas ducts, you should consider for each one the equivalent length to be included in the ue length calculation.

3- The exhaust terminal should jut above the roof by

at least 0.5 m.

4- The intake and exhaust gas ducts in Type C13 +

C53 must be installed on the same wall, or where the exhaust is vertical and the air intake horizontal, the terminals must be on the same side of the building.

Fig. 10

Table of ue gas exhaust duct lengths

COAXIAL SYSTEM

FLUE TYPE

MAX

LENGTH

DIAMETER

of PIPE

Equivalent

length

45° 90°

C13

Flue gas exhaust and air

suction duct through

external wall in the same

range of pressure

16 m 48 m

60/100 80/125

0.5 m

1 m

14 m 42 m

60/100 80/125

12 m 36 m

60/100 80/125

C 33

Flue gas exhaust and air

suction duct from outside

with roof terminal in the

same range of pressure

16 m 56 m

60/100 80/125

10 m 49 m

60/100 80/125

12 m 42 m

60/100 80/125

C43

Individual or shared ue

gas exhaust and air suction

through ue ducting built

into the building

Note: A specialist ue

system is required

16 m

0 m

60/100 80/125

14 m

0 m

60/100 80/125

12 m

0 m

60/100 80/125

installation

TWIN-PIPE SYSTEM

FLUE TYPE

MAX

LENGTH

DIAMETER

of PIPE

Equivalent

length

45° 90°

C13

Flue gas exhaust and air

suction duct through

external wall in the same

range of pressure

48 m

(S1=S2)

80/80

0.5 m

1 m

42 m

(S1=S2)

36 m

(S1=S2)

C 33

Flue gas exhaust and air

suction duct from outside

with the roof terminal

in the same range of

pressure

80 m

(S1=S2)

80/80

70 m

(S1=S2)

60 m

(S1=S2)

C53

Flue gas exhaust leading

outside and air suction

duct through external

wall not in the same

range of pressure

112 m

(S1+S2)

80/80

98 m

(S1+S2)

84 m

(S1+S2)

S1 = Air intake S2 = Flue gas exhaust

S1 = S2 - Air intake and ue gas exhaust equal lengths S1 + S2 - Air intake and ue gas exhaust unequal lengths

WARNING

H05V2V2-F

120

140

Before performing any work on the boiler, rst disconnect it from the electrical power supply using the external bipolar switch and removing the fuse.

Electrical connections

For increased safety, ask a qualied technician to perform a thorough check of the electrical system. The manufacturer is not responsible for any damage caused by the lack of a suitable earthing system or by the malfunctioning of the electricity mains supply. Make sure that the system is able to withstand the maximum power absorbed by the boiler (this is indicated on the appliance data plate). Check that the section of the wires is suitable and is not less than

0.75 mm2 The appliance must be connected to an ecient earthing system if it is to operate correctly. The power supply cable must be connected to a 230V-50Hz network, where the L-N poles and the earth connection are all respected. Important! In the event that the power supply cable must be changed, replace it with one with the same specications.

Power supply cable

installation

Electrical connection unit

To access the electrical connection unit carry out the following steps:

- Disconnect the boiler from the power supply

- Loosen the screws on the cover of the outside connection box below the boiler (see diagram below)

- Open the cover

- The connection PCB may be accessed in order to connect :

Main supply Live to pump Zone valves Outdoor sensor Switched live connection/s Cylinder stat

Important! The appliance is supplied with a y-lead already connected, this must be connected to a 240V supply fused at 3 Amp and must facilitate complete electrical isolation of the appliance, by use of a fused double pole isolator having a contact separation of at least 3mm in all poles or alternatively by means of a 3A fused three pin plug and unswitched shuttered socket outlet both complying with BS1363.

The use of multiplugs, extension leads or adaptors is strictly prohibited. It is strictly forbidden to use the piping from the hydraulic, heating and gas systems for the appliance earthing connection.

Caution! For the connection and positioning of the wires belonging to optional peripheral units, please refer to the installation manuals of these units.

installation

Solar probe

Display

1 8

detection

electrode

Ignitor

Gas valve

L N

FAN

EARTH

FLAME

FLOW

PUMP

ZONE1

FILLING

PUMP

SPEED

FUSE 2AT

1 2 3 4 1 2 3 45 6

1 234

Gas valve Ignitor

BUS P.C.B.

e-bus (optional)

C.H. flow temp.probe

CN04

CN07

CN22

13 12 11 10 9 8 7 6 5 4 3 2 1

12 11 10 9 8 7 6 5 4 3 2 1

11 10 9 8 7 6 5 4 3 2 1

8 7 6 5 4 3 2 1

C.H. return temp.probe

Thermal fuse

Modulating fan

Electrical diagram

NOTE: For separate 2 zone temperature management with an outdoor sensor connected contact the Technical Help Desk on 0870 241 8180

installation

TERMINAL

STRIP

S Plan system utilizing external 2 channel programmer and Ariston unvented hot water cylinder

installation

S Plan system utilizing integral 2 channel programmer and Ariston unvented hot water cylinder

Y Plan system utilizing external 2 channel programmer

installation

Y Plan system utilizing integral 2 channel programmer

Initial preparation

MTS (GB) Limited support the benchmark initiative. On pag es pages 61 and 62 of this manual the Benchmark Commissioning Checklist and Service Interval Record can be found. It is important that this is completed in the presence of your customer, they are shown how to use it, and it is signed by them. Please instruct your customer that they must have this manual with them whenever they contact a service engineer or us.

commissioning

Water Treatment:

The boiler is equipped with a stainless steel heat exchanger. The detailed recommendations for water treatment are given in BS 7593:1992 (Treatment of water in domestic hot water central heating systems); the following notes are given for general guidance;

If the boiler is installed on an existing system, any unsuitable additives must be removed;

Preliminar y electrical system checks to ensure electrical safety must be carried out by a competent person i.e. polarity, earth continuity, resistance to earth and short circuit.

Electricity supply

- Check that the voltage and frequency of the electricity supply correspond to the data shown on the boiler data plate;

- Make sure that the earthing connection is ecient.

Filling the Heating System:

Close all air release valves on the central heating system;

Open system

Fill the boiler system via the feed and expansion tank.

Sealed system

Gradually open the valves at the filling point (filling loop) until water is heard to flow, do not open fully; Open each air release tap starting with the lowest point and close them only when clear water free of air is visible; Inspect the system for water tightness and remedy any leaks discovered.

Gas Supply:

Inspec t the entire installation including the gas meter and test for tightness. The entire installation should be in accordance with the relevant standards. In GB this is BS 6891 and in IE this is the current edition of I.S.813.

Under no circumstances should the boiler be fired before the system has been thoroughly flushed and refilled; the flushing procedure must be in line with BS7593:1992.

Firstly fill the central heating system with the power off, and flush through cold, fill the central heating system again, adding a flushing detergent, run the boiler on central heating until it reaches its operating temperature and flush the system, refill the system with a suitable corrosion inhibitor,

Note : FAilu Re to cAR Ry out the Flus hiNg pRoce duRe will

Result iN the wARRANty becomiNg void.

The connection on the the appliance is a 15mm nut and olive located at the rear of the gas isolating valve.

If the gas supply serves other appliances, ensure that an adequate supply is available both to the boiler and the other appliances when they are in use at the same time.

Pipe work must be of an adequate size. Pipes of less than 22mm should not be used, final connection being 15mm. Open the gas isolating valve (supplied with the connection kit) to the appliance and check the gas connection on the appliance for leaks.

commissioning

Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installer . . . . . . . . . . . . . . . . . . . . . . . . . .

FIRST IGNITION OPERATION

1. Check the electrical supply.