Glow-worm 24-38CXI User Manual

0020013349-02.06.05

Instructions for Use

Installation and Servicing

To be left with the user

24cxi

G.C. No. 47-047-23

30cxi

G.C. No. 47-047-24

38cxi

G.C. No. 47-047-27

High Efficiency

Condensing

12175

Combination Boilers

Glow-worm, Nottingham Road, Belper, Derbyshire. DE56 1JT

www.glow-worm.co.uk

Guarantee Registration

Thank you for installing a new Glow-worm appliance in your home. Glow-worm appliances are manufactured to the very highest standard so we are pleased to offer our customers a Comprehensive Guarantee. This product is guaranteed for 24 months from the date of installation or 30 months from the date of manufacture, whichever is the shorter, for parts. In addition this product is guaranteed for 12 months from the date of installation or 18 months from the date of manufacture, whichever is the shorter, for labour. The second year of the parts guarantee, from the beginning of the 13th month onwards after installation or manufacture, is conditional upon the boiler having been serviced by a CORGI registered gas installer, in accordance with the manufacturer's recommendations. We strongly recommend regular servicing of your gas appliance, but where the condition is not met, any chargeable spare parts or components issued within the applicable guarantee period still benefit from a 12 month warranty from the date of issue by the manufacturer.

We recommend you complete and return as soon as possible your guarantee registration card.

If your guarantee registration card is missing you can obtain a copy or record your registration by telephoning the Glow-worm Customer Service number 01773 828100.

For customer service call:

01773 828100

Technical helpline: 01773 828300

For General and Sales enquiries:

Tel. 01773 824639

Fax: 01773 820569

To register your Glow-worm appliance call:

0800 073 2142

0020013349-02

Contents

The instructions consist of three parts, User, Installation and Servicing Instructions. The

instructions are an integral part of the appliance and must, to comply with the current issue

of the Gas Safety (Installation and Use) Regulations, be handed to the user on completion

of the installation.

CONTENTS DESCRIPTION SECTION PAGE No.

INTRODUCTION

INSTRUCTIONS

FOR USE

INSTALLATION

INSTRUCTIONS

SERVICING

INSTRUCTIONS

Important Information 4 General Information 5 Manual Handling 5

Appliance Safety Devices 7 Maintenance and Servicing 7 Operating the Boiler 8

Technical Information 1 10 Boiler Location and Ventilation 2 13 Flue Location and Ventilation 3 14 Heating System 4 16 Domestic Hot Water System 5 18 Installation Preparation 6 18 Gas/Water & Appliance Connection 7 21 Safety Discharge Valve and Condensate Connection 8 22 Flue Preparation Telescopic and Standard Flue 9 24 Electrical Connection 10 27 Commissioning 11 29

Servicing 12 32 Fault Finding 13 36 Replacement of Parts 14 40 Spare Parts 15 51

3 0020013349-02

Important Information

WARNINGS

Gas Leak or Fault

Turn off the gas emergency control valve immediately. Eliminate all sources of ignition, i.e.smoking, blowlamps, hot air guns

etc. Do not operate electrical lights or switches either on or off. Open all doors and windows,ventilate the area.

Sheet Metal Parts

This boiler contains metal parts (components) and care should be taken when handling and cleaning,

Under no circumstances must the User interfere with or adjust sealed parts.

with particular regard to edges.

Sealed Components

Gas Category

This boiler is for use only on G20 natural gas, but the 30cxi may be converted for use on G31 gas (Propane L.P.G.).

Gas Safety (Installation and Use) Regulations

In your own interests and that of safety, it is the Law that ALL gas appliances are installed by a competent person in accordance with the current issue of the above regulations.

Testing and Certification

This boiler is tested and certificated for safety and performance. It is, therefore, important that no alteration is made to the boiler, without permission, in writing, by Glowworm.

Any alteration not approved by Glow-worm, could invalidate the certification, boiler warranty and may also infringe the current issue of the statutory requirements.

CE Mark

This boiler meets the requirements of Statutory Instrument, No. 3083 The Boiler (Efficiency) Regulations, and therefore is deemed to meet the requirements of Directive 92/42/EEC on the efficiency requirements for new hot water boilers fired with liquid or gaseous fuels.

Type test for purposes of Regulation 5 certified by: Notified body

0087.

Product/production certified by: Notified body 0086.

The CE mark on this appliance shows compliance with:

1. Directive 90/396/EEC on the approximation of the laws of the Member States relating to appliances burning gaseous fuels.

2. Directive 73/23/EEC on the harmonisation of the Laws of the Member States relating to electrical equipment designed for use within certain voltage limits.

3. Directive 89/336/EEC on the approximation of the Laws of the Member States relating to electromagnetic compatibility.

Control of Substances Hazardous to Health

Under Section 6 of The Health and Safety at Work Act 1974, we are required to provide information on substances hazardous to health.

The adhesives and sealants used in this appliance are cured and give no known hazard in this state.

Insulation Pads / Ceramic Fibre

These can cause irritation to skin, eyes and the respiratory tract.

If you have a history of skin complaint you may be susceptible to irritation. High dust levels are usual only if the material is broken.

Normal handling should not cause discomfort, but follow normal good hygiene and wash your hands before eating, drinking or going to the lavatory.

If you do suffer irritation to the eyes or severe irritation to the skin seek medical attention.

Electrical Supply

The boiler must be earthed.

All system components shall be of an approved type and all wiring to current I.E.E. wiring regulations.

External wiring must be correctly earthed, polarised and in accordance with the relevant standards.

In GB this is BS 6891.

In IE this is the current edition of I.S.813 "Domestic Gas Installations".

The boiler must be connected to a permanent 230V ac, 50Hz supply.

Connection of the whole electrical system of the boiler, including any heating controls, to the electrical supply must be through one common isolator and must be fused 3 Amp maximum.

Isolation should be by a double pole switched fused spur box, with a minimum gap of 3mm for both poles. The fused spur box should be readily accessible and preferably adjacent to the appliance. It should be identified as to its use.

Alternatively connection can be made through an unswitched shuttered socket and 3A fused 3-pin plug both to the current issue of BS 1363 may be used, provided they are not used in a room containing a bath or shower.

Wiring to the boiler must be PVC 85 than 0.75mm2 (24/0.20mm).

C insulated cable, not less

0020013349-02

General Information

General Note

This boiler is designed for use as part of a sealed water central heating system with fully pumped circulation. The pump, expansion vessel and associated safety devices are all fitted within the boiler.

Once the controls are set the boiler operates automatically.

Please read these instructions and follow them carefully for the correct installation and economical use of your boiler.

Water Treatment

In the case of an existing installation, it is ESSENTIAL that prior to installing the new boiler the system is thoroughly flushed. For optimum performance after installation of a new system, the boiler and its associated central heating system should also be flushed. Flushing should be carried out in accordance with BS7593: 1992 using a cleanser such as Sentinel X300 or X400, Fernox restorer or Salamander corrosion guard cleaner.

For long-term corrosion protection, after flushing, an inhibitor suitable for stainless steel exchangers should be used, refer to the current issue of BS 5449 and BS 7593 on the use of inhibitors in central heating systems. Examples are Sentinel X100 Fernox protector or Salamander corrosion guard inhibitor.

Compartment or Cupboard Installations

If the boiler is fitted into a compartment or cupboard it does not require ventilation openings.

Do not use the compartment or cupboard for storage.

Condensate Drain

The condensate drain, see section 8.2, must not be modified or blocked.

Pluming from flue terminal

Like all condensing boilers this appliance will produce a plume of condensation from the flue terminal in cool weather. This is due to the high efficiency and hence low flue gas temperature of the boiler. It is normal and not a fault indication.

Cleaning

The boiler casing can be cleaned using a mild liquid detergent with a damp cloth, then a dry cloth to polish.

Do not use any form of abrasive or solvent cleaner as you may damage the paintwork.

Electrical Supply

If the mains electricity and gas are to be turned off for any long periods during severe weather, it is recommended that the whole system, including the boiler, should be drained to avoid the risk of freezing. Make sure that, if fitted, the immersion heater in the cylinder is switched off.

NOTE: If you have a sealed water system contact your installation/servicing company as draining, refilling and pressurising MUST be carried out by a competent person.

Clearances

If fixtures are positioned close to the boiler, space must be left as shown in section 2. Enough space must also be left in front of the boiler to allow for servicing.

Manual Handling

IMPORTANT. With regards to the Manual Handling Operations,

1992 Regulations, the following lift operation exceeds the recommended weight for a one man lift.

General recommendations when handling

Clear the route before attempting the lift.

Ensure safe lifting techniques are used – keep back straight – bend using legs.

Keep load as close to body as possible.

Do not twist – reposition feet instead.

If 2 persons performing lift, ensure co-ordinated movements during lift.

Avoid upper body/top heavy bending - do not lean forward/ sideways.

Recommend wear suitable cut resistant gloves with good grip to protect against sharp edges and ensure good grip.

Always use assistance if required.

Removal of carton from delivery van

Carriage of carton from point of delivery to point of installation – ground floor

Recommend 2 person lift or 1 person with use of sack truck. If 1 person is performing lift, straddle the load, tilt and place carton into position on truck. Recommend secure appliance onto truck with suitable straps. Ensure safe lifting techniques are used – keep back straight – bend using legs. Keep load as close to body as possible. If 2 persons performing lift, ensure coordinated movements during lift. Clear the route before attempting the lift. If removing boiler from truck straddle the load and tilt forwards to facilitate secure grip. Ensure safe lifting techniques are used – keep back straight – bend using legs. Do not twist – reposition feet instead. Take care to avoid trip hazards, slippery or wet surfaces and when climbing steps and stairs. Always use assistance if required.

5 0020013349-02

Manual Handling

Carriage of carton from point of delivery to point of installation – first or higher floor, cellar.

Recommend 2-person lift or 1 person with use of sack truck. If 1 person is performing lift, straddle the load, tilt and place carton into position on truck. Recommend secure appliance onto truck with suitable straps. Ensure safe lifting techniques are used – keep back straight – bend using legs. Keep load as close to body as possible. If 2 persons performing lift, ensure coordinated movements during lift. Avoid upper body/top heavy bending - do not lean forward/sideways. Clear the route before attempting the lift. If removing boiler from truck straddle the load and tilt forwards to facilitate secure grip. Ensure safe lifting techniques are used – keep back straight – bend using legs. Do not twist – reposition feet instead. Take care to avoid trip hazards, slippery or wet surfaces and when climbing steps and stairs. Always use assistance if required.

Carriage of carton from point of delivery to point of installation – roofspace.

Recommend 2-person lift. Ensure co-ordinated movements during lift. Avoid upper body/top heavy bending - do not lean forward/sideways. Clear the route before attempting the lift. Take care to avoid trip hazards, slippery or wet surfaces and when climbing steps and stairs. When transferring appliance into roofspace, recommend 1 person to be in roofspace to receive the appliance and other person to be below to pass up and support appliance. Ensure safe lifting techniques are used – keep back straight – bend using legs. Keep load as close to body as possible. Always use assistance if required. It is assumed safe access, flooring and adequate lighting are provided in the roof space. It is recommended a risk assessment of the roof space area be carried out before moving the appliance into the area to take into account access, stability of flooring, lighting and other factors, and appropriate measures taken.

Unpacking of appliance from carton.

Recommend 2 persons unpack appliance from carton. Always keep working area clear. Recommend cut base end of carton and open carton flaps, then tilt boiler forwards from its side onto its base and remove carton by sliding up over the boiler. Ensure safe lifting techniques are used – keep back straight – bend using legs. Keep load as close to body as possible. Always use assistance if required. Dispose of packaging in a responsible manner. Recommend wear suitable cut resistant gloves with good grip to protect against sharp edges and ensure good grip when handling appliance outside packaging.

Positioning of Appliance for Final Installation – no obstructions.

Recommend 2 persons lift appliance to position into place. Fit bracket securely onto wall before lifting appliance into position. Obtain firm grip on front and sides of appliance, lift upwards, ensure stable balance achieved and lift upwards to position in place on bracket. Ensure safe lifting techniques are used – keep back straight – bend using legs - when lifting load from floor level. Do not twist – reposition feet instead. Keep boiler as close as possible to body throughout lift to minimise strain on back. Ensure co-ordinated movements to ensure equal spread of weight of load. Always use assistance if required. Recommend wear suitable cut resistant gloves with good grip to protect against sharp edges and ensure good grip when handling appliance.

Positioning of Appliance for Final Installation – above worktop, foreseeable obstructions etc.

Recommend 2 persons lift appliance to position into place. Fit bracket securely onto wall before lifting appliance into position. Obtain firm grip on front and sides of appliance, lift upwards, onto worktop if practicable. Ensure stable balance achieved and lift upwards to position in place on bracket. If 2 persons positioning onto bracket obtain firm grip at front and sides/base of boiler. Ensure co-ordinated movements during 2 person lifts to ensure equal spread of weight of load. Ensure safe lifting techniques are used – keep back straight – bend using legs when lifting load from floor level. Do not twist – reposition feet instead. Keep boiler as close as possible to body throughout lift to minimise strain on back. Avoid upper body/top heavy bending - do not lean forward/sideways. Always use assistance if required. Recommend wear suitable cut resistant gloves with good grip to protect against sharp edges and ensure good grip when handling appliance.

Positioning of Appliance for Final Installation – within compartment etc. restricting installation.

Recommend 2 persons lift appliance to position into place, space permitting. Fit bracket securely onto wall before lifting appliance into position. Obtain firm grip on front and sides of appliance, lift upwards, onto worktop if practicable. Ensure stable balance achieved and lift upwards to drop into place onto bracket. If 2 persons positioning onto bracket obtain firm grip at front and sides/base of boiler. Ensure co-ordinated movements during 2 person lifts to ensure equal spread of weight of load. If 1 person positioning onto bracket recommend obtain firm grip supporting base of boiler. Ensure safe lifting techniques are used – keep back straight – bend using legs - when lifting load from floor level. Do not twist – reposition feet instead. Keep boiler as close as possible to body throughout lift to minimise strain on back. Always use assistance if required. Recommend wear suitable cut resistant gloves with good grip to protect against sharp edges and ensure good grip when handling appliance.

Positioning of Appliance for Final Installation – in roof space restricting installation.

Recommend 2 persons lift appliance to position into place, space permitting. Fit bracket securely onto wall before lifting appliance into position. Obtain firm grip on front and sides of appliance, lift upwards, ensure stable balance achieved and lift upwards to drop into place onto bracket. If 2 persons positioning onto bracket obtain firm grip at front and sides/base of boiler. Ensure co-ordinated movements during 2 person lifts to ensure equal spread of weight of load. If 1 person positioning onto bracket recommend obtain firm grip supporting base of boiler. Ensure safe lifting techniques are used - keep back straight – bend using legs - when lifting load from floor level. Do not twist – reposition feet instead. Keep boiler as close as possible to body throughout lift to minimise strain on back. Always use assistance if required. Recommend wear suitable cut resistant gloves with good grip to protect against sharp edges and ensure good grip when handling appliance. It is recommended a risk assessment of the roof space area be carried out before moving the appliance into the area to take into account access, stability of flooring, lighting and other factors, and appropriate measures taken.

0020013349-02

Appliance Safety Devices - User Instructions

Electrical Supply Failure Reset Switch

The boiler will not work without an electrical supply.

Normal operation of the boiler should resume when the electrical supply is restored.

Reset any external controls, to resume normal operation of the central heating.

If the boiler does not resume normal operation turn the mains reset switch off and on. If the boiler does not resume normal operation after this the overheat stat may have operated.

Overheating safety

In the event of the boiler overheating the safety devices will cause a safety shutdown. If this happens, call your Installation/ Servicing company.

Safety Discharge Valve

A safety discharge valve and discharge pipe is fitted to the boiler. This valve must not be touched. Should there be any discharge from the pipe, isolate the boiler electrical supply and call your installer or Glow-worm’s own service organisation using the telephone number on the inside front cover of this booklet.

Frost protection

The appliance has a built in frost protection device that protects the boiler from freezing. With the gas and electric supplies ON and irrespective of any room thermostat setting, the frost protection device will operate the pump when the temperature of the boiler water falls below 7

The burner will fire if the temperature inside the boiler falls to 3OC.

When the temperature reaches 10

Any other exposed areas of the system should be protected by a separate frost thermostat.

C the boiler stops.

Condensate Drain Blockage

As a safety feature the boiler will stop working if the condensate drain becomes blocked. During freezing conditions this may be due to the forming of ice in the condense drain external to the house. Release an ice blockage by the use of warm cloths on the pipe. The boiler should then restart. Contact your installation/ servicing company if the fault persists.

Maintenance and Servicing - User Instructions

Maintenance and Servicing

To ensure the continued efficient and safe operation of the appliance it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of servicing will depend upon the particular installation conditions and usage, refer to guarantee registration on the inside front cover of this literature.

If this appliance is installed in a rented property there is a duty of care imposed on the owner of the property by the current issue of the Gas Safety (Installation and Use) Regulations, Section 35.

Servicing/maintenance should be carried out by a competent person in accordance with the rules in force in the countries of destination.

To obtain service, please call your installer or Glow-worm’s own service organisation using the telephone number on the inside front cover of this literature.

Please be advised that the 'Benchmark' logbook should be completed by the installation engineer on completion of commissioning and servicing.

All CORGI Registered Installers carry a CORGI ID card, and have a registration number. Both should be recorded in your benchmark Logbook. You can check your installer is CORGI registered by calling CORGI direct on: 01256 372300.

Spare Parts

Remember, when replacing a part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Glow-worm.

If a part is required contact Glow-worm's own service organisation using the telephone number on the inside front cover of this booklet.

Please quote the name of the appliance, this infomation will be on the name badge on the front of the appliance.

If in doubt seek advice from the local gas company or Glowworm's own service organisation using the telephone number on the inside front cover of this booklet.

7 0020013349-02

Operating the Boiler - User Instructions

CONTROLS FASCIA

CONTROL LIGHT

CENTRAL HEATING WATER TEMPERATURE CONTROL

DIGITAL DISPLAY

NO PRE-HEAT POSITION

HOT WATER TEMPERATURE CONTROL

ECONOMY POSITION APPROX 55O WITH PRE-HEAT

MAXIMUM POSITION APPROX 62O WITH PRE-HEAT

OPERATION OF THE BOILER

1. Check that all isolating valves on the boiler are open and that water flows from the hot water tap.

2. If you are in any doubt about the boiler being filled with water contact your installer or Glow-worm's own service

organisation using the telephone number on the inside front cover of this booklet. Do not operate the boiler

without water.

3. Check that the electrical supply to the boiler is ON and set any remote controls as required..

4. With the User controls in their "OFF" (0) positions, turn the Mains Reset Switch to the ON (1) position, the running

lamp will initially illuminate (green) then go off, the system pressure will be displayed and should read on the digital display, at least 0.7bar (recommended 1.0bar), if less, pressurise as described in the System Pressurisation section.

9934

MAINS RESET SWITCH

Diagram 1

USER CONTROLS

CENTRAL HEATING CONTROL

1. Turn the central heating water temperature control "ON", the lighting sequence will begin, the running lamp will illuminate (green) to indicate the boiler has lit, the system temperature will now be displayed instead of system pressure.

The temperature of the central heating water can be adjusted by turning the central heating water temperature control to desired setting between 1 'Min' and

Set the control to

If the boiler fails to light, reset the controls, see paragraph below, TO RESET

If a fault occurs the running lamp will flash red and a fault code will appear on the digital display.

DOMESTIC HOT WATER CONTROL

2. Position 0 - hot water OFF. Turn hot water temperature control between 0 to

pre-heat. Turn hot water temperature control between and for hot water, 40oC - 62oC with pre-heat.

Pre-heat is a function that provides hot water with minimum delay.

The ECO setting is recommended and ideally suited to normal family use (showers, washing up etc.).

Positions between ECO and

TO RESET

3. Turn the Mains Reset Switch to 0, wait for 5 seconds, turn Mains Reset Switch to 1, the boiler is reset.

If the fault persists contact your installer/service provider using the telephone number on the inside font cover of this booklet.

TO TURN THE BOILER OFF

4. Turn the Mains Reset Switch to the OFF (0) position.

Turn the gas supply OFF at the gas service cock if the boiler is to be out of use for some time.

'0' to switch off heating.

are for occasional use, for water above 55oC approx.

'Max'. Maximum setting is appoximately 82°C.

for hot water 62oC with no

0020013349-02

Operating the Boiler - User Instructions

Digital Display/ System Pressurisation

The digital display normally shows the operating temperature of the unit when there is a central heating demand and gives a pressure reading when there is no demand or when the appliance is in the domestic hot water mode.

If the digital display shows pressure less than 0.7bar, repressurise the system to 1bar by gently opening the built in filling tap underneath the boiler, see diagram 2. A tap extension is provided to facilitate this. Ensure the tap is closed. If the system repeatedly loses pressure, YOU MUST CONTACT YOUR INSTALLER OR GLOW-WORM'S OWN SERVICE ORGANISATION USING THE TELEPHONE NUMBER ON THE INSIDE FRONT COVER OF THIS BOOKLET.

12945

To Turn the Boiler Off

There is a mains reset switch on the right hand side of the controls fascia, which will isolate the boiler. However, it is preferable to leave the electrical supply on whenever possible to permit operation of the built-in frost protection (see 'Protection Against Freezing') and daily pump and valve exercise.

To turn off the central heating use the room thermostat or programmer.

To turn off the domestic hot water turn the hot water temperature control knob to the minimum setting.

For holiday mode turn both of the temperature knobs to the minimum setting.

To turn off the boiler for servicing, isolate it from the electrical supply. To turn it on again follow the instructions given in 'Operation of the Boiler'.

FILLING LOOP TUBE

FILLING LOOP TAP AND EXTENSION

Diagram 2

9 0020013349-02

1 Technical Information

THIS DIMENSION CAN BE INCREASED TO 600mm MAX.

176

334

FLUE

GAS

12891

FLUE CENTRE LINE

BOILER

715

SAFETY DISCHARGE DRAIN

117

1.1 IMPORTANT NOTICE

The boiler is supplied in one carton, which includes a fittings pack, pipe pack, fixing jig, condense pipe, and documentation pack, see diagram 6.1 and 6.1a.

The flue is supplied seperately.

This boiler is for use only on G20 natural gas, but the 30cxi may be converted for use on G31 gas (Propane L.P.G.).

Where no British Standards exists, materials and equipment should be fit for their purpose and of suitable quality and workmanship.

The installation of this boiler must be carried out by a competent person in accordance the rules in force in the countries of destination.

Manufacturer's instructions must not be taken as overriding statutory requirements.

1.2 Statutory Requirements

In GB the installation of the boiler must be carried out by a competent person as described in the following regulations:

The manufacturer's instructions supplied.

The Gas Safety (Installation and Use) Regulations.

The appropriate Buildings Regulations either The Building Regulations, The Building Regulations (Scotland),The Building Regulations (Northern Ireland).

156

134

450

Diagram 1.1GENERAL ARRANGEMENT

The Water Fittings Regulations or Water byelaws in Scotland.

The Health and Safety at Work Act, Control of Substances Hazardous to Health (COSHH).

The Current I.E.E. Wiring Regulations.

Where no specific instructions are given, reference should be made to the relevant British Standard Code of Practice.

In IE, the installation must be carried out by a competent person and installed in accordance with the current edition of I.S.813 "Domestic Gas Installations", the current Building Regulations and reference should be made to the current ETCI rules for Electrical Installation.

In GB the following Codes of Practice apply:

BS4814, BS6798, BS5440 Part 1 and 2, BS5546 Part 1, BS5449, BS6891, BS6700, BS7074 Part 1 and 2, BS7593, BS7671.

In IE: I.S.813, BS5546, BS 5449, BS 7074, BS 7593.

Manufacturer's instructions must not be taken as overriding statutory requirements.

Note: For further information, see the current issue of the Building Regulations, approved document L1 ( in the UK) and the references:

1) GIL 59, 2000: Central heating system specification (CheSS) and

2) GPG 302, 2001: Controls for domestic central heating system and hot water. BRECSU.

0020013349-02

1 Technical Information

12923

Lift Weight 41kg(90lb) 42kg(92.5lb) 44kg(97lb) Total Weight (installed) 44kg(97lb) 45kg(99lb) 47kg(103.5lb)

● Gas connection 22mm copper

● Heating and return 22mm copper

● Domestic hot water 15mm copper

Safety valve Preset 3bar (43.5lbf/in

Safety valve discharge 15mm copper

■ Expansion vessel capacity 8 litres (1.76 gallons) Charge pressure 0.5bar (7.3lbf/in2)

Heating system 0.7bar (10.1lbf/in2) minimum pressure

D.H.W Max. working pressure 10bar (145lbf/in2) Minimum working pressure for max. domestic flow rate 0.2bar (2.9lbf/in

Max. Domestic hot water flow rate at 35OC rise 24 cxi 9.8L/min.

Min. Domestic hot water flow rate 24/30/38cxi 1L/min.

Maximum flow temperature 630C

TABLE 1

24cxi 30cxi 38cxi

)

30 cxi 12.3L/min. 38 cxi 15.5L/min.

)

■ Maximum heating system 130 litres

water content using (28.6 gallons) pressurised at 1bar. fitted expansion vessel,

at 75

C average system

temperature

Electrical supply 230V~50Hz Electrical rating 180W fused 3A IP classification X4D

Internal Fuse rating

On PCB 630mAT

● Ball valves are fitted in water and gas connections.

■ For larger systems use an additional

expansion vessel.

Diagram 1.2

11 0020013349-02

1 Technical Information

Certification

This boiler certificated to the current issue of EN 483 : 2000 for performance and safety.

It is important that no alteration is made to the boiler, without permission, in writing, from Glow-worm.

Any alteration that is not approved by Glow-worm, could invalidate the warranty and could also infringe the current issue of the Statutory Requirements.

1.3 Gas Supply

The gas installation must be in accordance with the relevant standards.

In GB this is BS6891.

In IE this is the current edition of I.S.813 "Domestic Gas Installations".

The supply from the governed meter must be of adequate size to provide a steady inlet working pressure of 20mbar (8in wg) at the boiler.

On completion, test the gas installation for soundness using the pressure drop method and suitable leak detection fluid, purge in accordance with the above standard.

1.4 Technical Data

All dimensions are given in millimetres (except as noted).

See diagrams 1.1 and Tables 1 and 2.

The data label is positioned on the inner door, refer to diagram

1.2.

The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is Class 'A' : 24cxi - 90.3%, 30cxi - 90.3% & 38cxi - 90.6%.

The value is used in the UK Government's Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated has been certified by B.S.I.

1.5 Condensate Drain

A plastic drain pipe must be fitted to allow discharge of condensate to a drain.

Condensate should, if possible, be discharged into the internal household draining system. If this is not practical, discharge can be made externally into the household drainage system or a purpose designed soak away, see section 8.2 for more details.

1.6 Upward Piping Kits

Where the domestic hot water and heating flow and return pipes come from above the boiler or just the heating flow and return pipes, upward piping kits are available to facilitate this.

Central Heating only, part No. A2051000

Central Heating and DHW, part No. A2050900

Contact Glow-worm for further details.

1.7 Optional Programmer Kit

An optional programmer for fitting in the boiler is available, Pt. no. A20087 electromechanical or A20087 digital.

SCHEMATIC LAYOUT OF BOILER

TABLE 2

24 cxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

Case On 9.3 +0.3 -0.5

MIN MAX

m3/h

ft3/h

0.48 2.24

16.8 79

30 cxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

Case On 9.3 +0.3 -0.5

MIN MAX

m3/h

ft3/h

0.48 2.8

16.8 99

38 cxi

9165

Diagram 1.3

0020013349-02

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 8.8 +0.2 -0.5

Case On 9.0 +0.3 -0.5

m3/h

ft3/h

MIN MAX

0.62 3.6

21.8 127

2 Boiler Location and Ventilation

2.1 Location

This boiler is not suitable for outdoor installation.

This boiler may be installed in any room, although particular attention is drawn to the installation of a boiler in a room containing a bath or shower where reference must be made to the relevant requirements.

This boiler is suitable for installation in bathroom zones 2 and 3.

In GB this is the current I.E.E. WIRING REGULATIONS and BUILDING REGULATIONS.

In IE reference should be made to the current edition of I.S.813 "Domestic Gas Installations" and the current ETCI rules.

2.2 Clearances

The boiler should be positioned so that at least the minimum operational and servicing clearances are provided, see diagram

2.1.

Additional clearances may be beneficial around the boiler for installation and servicing.

For flue installations where external access is not practicable, consideration should be given for the space required to insert the flue internally, which may necessitate clearance larger than those specified in diagram 2.1.

12344

600

150

2.3 Timber Frame Buildings

If the boiler is to be installed in a timber frame building it should be fitted in accordance with the Institute of Gas Engineers document IGE/UP/7/1998. If in doubt seek advice from the local gas undertaking or Glow-worm.

2.4 Room Ventilation

The boiler is room sealed, so when it is installed in a room or space, a permanent air vent is not required.

2.5 Cupboard or Compartment Ventilation

Due to the high efficiency and hence low casing temperature of this boiler, cupboard or compartment ventilation is not necessary.

Leave existing air vents.

20 20

200

+ A removable compartment door can be placed at least 5mm in front of the appliance.

MINIMUM CLEARANCE FROM PERMANENT SURFACES

Diagram 2.1

13 0020013349-02

3 Flue Location and Ventilation

3.1 Flue Options

This boiler is suitable for concentric Horizontal and Vertical flues, elevated horizontal and vertical twin, all are fitted onto the top of the boiler.

The Glow-worm Flue Options Guide, available on request or through the web site, describes in detail the necessary accessories.

These instructions describe the use of the standard and telescopic horizontal flues.

The instructions for all other flues will be contained in those packs.

75 min. to 540 max.

WALL THICKNESS

87min

112

3.2 Flue Length

The maximum permissable horizontal flue length is 10 metres plus the flue terminal, this can be achieved by use of the accessories, however should additional 90 be used then the length MUST be reduced by 1metre.

When extension pipes are used the flue system must be designed to have a continuous fall to the boiler of at least 2.5 44mm/metre to allow condensate to run back into the boiler and out via the drain.

The flue can be installed from inside the building, when access to the outside wall face is not practicable.

The diagrams 3.1 to 3.4 describe the lengths achievable without the use of extensions or elbows.

208 min. to 413 max.

12839

87min

WALL THICKNESS

or 2 x 45o elbows

112

12837

176

OUTSIDE WALL FACE

NOTE. If necessary, it is permitted to increase this dimension to 600mm max.

BOILER MOUNTING WALL

TOP REAR FLUE - STANDARD

NOTE. If necessary, it is permitted to increase this dimension to 600mm max.

87min

Max flue length 717mm

20mm min. clearance

Diagram 3.1

211239

FLUE

12840

176

OUTSIDE WALL FACE

NOTE. If necessary, it is permitted to increase this dimension to 600mm max.

BOILER MOUNTING WALL

TOP REAR FLUE - TELESCOPIC

NOTE. If necessary, it is permitted to increase this dimension to 600mm max.

87min

Max flue length 589mm

20mm min. clearance

Diagram 3.3

211239

FLUE

12838

OUTSIDE WALL FACE

INTERNAL SURFACE

Max. distance from outside

wall face to min clearance. LH - 458mm

Min. distance from outside wall face to min clearance. LH/RH - 75mm

RH - 486mm

TOP SIDE FLUE - STANDARD

0020013349-02

OUTSIDE WALL FACE

Max. distance from outside wall face to min clearance. LH - 330mm RH - 358mm

Diagram 3.2 Diagram 3.4

TOP SIDE FLUE - TELESCOPIC

INTERNAL SURFACE

Min. distance from outside

wall face to min clearance. LH - 125mm RH - 153mm

3 Flue Location and Ventilation

MINIMUM SITING DIMENSIONS FOR FANNED FLUE TERMINALS POSITION MM

HORIZONTAL FLUES

A DIRECTLY BELOW AN OPENING, AIR BRICK,

OPENING WINDOWS 300

B ABOVE AN OPENING, AIR BRICK,

OPENING WINDOWS 300

C HORIZONTALLY TO AN OPENING,

AIR BRICK, OPENING WINDOWS 300

D BELOW GUTTER, DRAIN/SOIL PIPE 25

E BELOW EAVES 25

F BELOW A BALCONY OR CAR PORT 25

G FROM VERTICAL DRAIN PIPES AND

SOIL PIPES 25

H FROM INTERNAL/EXTERNAL CORNERS 25

H TO A BOUNDARY ALONGSIDE THE

TERMINAL 300

I ABOVE ADJACENT GROUND OR

BALCONY LEVEL 300

J FROM SURFACE OR A BOUNDARY

FACING THE TERMINAL 600

K FACING TERMINALS 1200

L FROM OPENING (DOOR/WINDOW)

IN CAR PORT INTO DWELLING 1200

M VERTICAL FROM A TERMINAL 1500

N HORIZONTALLY FROM A TERMINAL 300

3.4 Terminal Position

The minimum acceptable siting dimensions for the terminal from obstructions, other terminals and ventilation openings are shown in diagram 3.5. For Ireland the minimum distances for flue terminal positioning must be those detailed in I.S.813 "Domestic Gas Installations".

The terminal must be exposed to the external air, allowing free passage of air across it at all times.

Being a condensing boiler some pluming may occur from the flue outlet. This should be taken into consideration when selecting the position for the terminal.

* and J* See diagram 3.5 . These dimensions comply with

the building regulations, but they may need to be increased to avoid wall staining and nuisance from pluming depending on site conditions.

Increased siting flexibility can be achieved by using the Glowworm Plume Management Kit, A2044000 (black) or A2044100 (white).

NOTE: If necessary it is permitted to increase the terminal protrusion through the outside wall to greater than the minimum dimension of 87mm but no more than 600mm, see diagram 1.1.

Carports or similar extensions of a roof only, or a roof and one wall, require special consideration with respect to any openings, doors, vents or windows under the roof. Care is required to protect the roof if made of plastic sheeting. If the carport comprises of a roof and two or more walls, seek advice from the local gas supply company before installing the boiler.

3.5 Terminal Guard

A terminal guard is required if persons could come into contact with the terminal or the terminal could be subject to damage.

If a terminal guard is required, it must be positioned to provide minimum of 50mm clearance from any part of the terminal and be central over the terminal.

The guard should be similar to that shown in diagram 3.6.

A suitable guard is manufactured by: -

Tower Flue Components

Morley Rd.

Tonbridge

Kent

TN9 1RA.

Size: 280mm x 280mm x 270mm.

TERMINAL GUARD

VERTICAL FLUES

P FROM ANOTHER TERMINAL 600

Q ABOVE ROOF LEVEL 300

R FROM ADJACENT OPENING WINDOW 1000

S FROM ADJACENT WALL TO FLUE 300

Diagram 3.5

Diagram 3.6

15 0020013349-02

4 Heating System

4.1 General

The boiler is for use only with sealed central heating systems.

The safety valve is an integral part of the boiler and it cannot be adjusted.

The digital readout on the controls fascia indicates the system pressure when there is no central heating demand.

The circulation pump is integral with the boiler.

4.2 Expansion Vessel

The boiler has an integral expansion vessel with a capacity of 8 litres (1.76 gallons), with a charge pressure of 0.5bar.

NOTE: The expansion vessel volume depends on the total water system volume and the initial system design pressure. Guidance on vessel sizing is also given in the current issue of BS5449 and BS7074 Part 1, for IE refer to the current edition of I.S.813 "Domestic Gas Installations".

Table 3. Flow Rate

MODEL MINIMUM FLOW RATE

24 cxi 774 litres/hr.

30 cxi 1032 litres/hr.

38 cxi 1289 litres/hr.

This is equal to 20OC differential at maximum heat input.

9168

4.3 Flow Rate

If it is necessary to alter the flow rate, the system can be fitted with a lockable balancing valve in the main flow or return pipes shown as valve "A" in diagram 4.1. The flow rate through the boiler must not be allowed to fall below that given in table 3.

4.4 Bypass

The boiler is fitted with an adjustable automatic bypass. Ensure that under no circumstances does the flow rate drop below the figure specified, refer to table 3 and section 11.6.

The installation of the boiler must comply with the requirements of the current issue of BS6798, in Ireland, refer also to the current edition of I.S.813 "Domestic Gas Installations".

In GB it is necessary to comply with the Water Supply (Water Fittings) Regulations 1999 (for Scotland, the Water Byelaws 2000, Scotland).

To comply with the Water regulations your attention is drawn to: The Water Regulations guide published by the Water Regulations Advisory Service (WRAS) gives full details of the requirements.

In IE the requirements given in the current edition of I.S.813 "Domestic Gas Installations" and the current Building Regulations must be followed.

4.5 Filling the Sealed System

NOTE: The water pressure at the boiler must be at least 1.2bar

to enable filling the boiler to a minimum pressure. If not pressurisation must be carried out by an alternative filling loop.

The boiler has a built in filling device, see diagram 4.2. A pushon extension is supplied in the loose items pack to ease access to the filling device tap.

This filling device is designed to enable the re-pressurisation of the system in the event of loss of pressure. It is not intended to be used to completely fill the system. If so used, it may take a long time to fill the system.

To fill the system quickly provision should be made to include a proprietry filling loop external to the boiler.

Suitable external filling systems are shown diagramatically, see diagram 4.3. The system should be pressurized to 1 bar, indicated on the digital display with no heating demand.

* Refer to section 11.6

0020013349-02

Diagram 4.1

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