Glen Dimplex Combi 24, Combi 30, Combi 38 Installation And Servicing Instructions

Download

Combi 24 Combi 30 Combi 38

Combination Condensing Boilers

Installation and Servicing Instructions

These instructions should be left with the user

SALES AND SERVICE HELPLINE: 0844 371 1111

Glen Dimplex Boilers is continually improving its products and therefore

reserve the right to change productspecifications without prior notice.

Errors & omissions excepted.

Glen Dimplex Boilers

Stoney Lane

Prescot

Merseyside. L35 2XW

For all telephone enquiries call:

0844 371 2222

website:

www.glendimplexboilers.com

Part of the Glen Dimplex Group

48pp MANUAL SPREADS 19/10/10 08:36 Page 1

GAS COUNCIL NUMBERS

Natural Gas

Dimplex Combi 38 - Gas Council Appliance No: 4

47 149 01

Dimplex Combi 30 - Gas Council Appliance No: 4

47 149 02

Dimplex Combi 24 - Gas Council Appliance No: 4

47 149 03

APPROVED PRODUCT

17.0 BENCHMARK

VENTED CYLINDER COMMISSIONING CHECKLIST

This Commissioning Checklist is to be completed in full by the competent person who commissioned the

cylinder as a means of demonstrating compliance with the appropriate Building Regulations and should

remain attached to the cylinder for future reference.

Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the

warranty but does not affect statutory rights.

Commissioned by (print name)

Company Name

Company Address

Telephone Number Commissioning Date

To be completed by the customer on receipt of a Building Regulations Compliance Certiﬁcate*:

Building Regulations Notiﬁcation Number (if applicable)

ALL CYLINDERS

The vent pipe has been installed to BS6700/BS5449 Yes

What is the static head?

metres

Has an immersion heater been ﬁtted? Yes

If yes, does it have a non-auto resetting energy cut out? Yes

Is the cold feed cistern supported in accordance with BS4213? Yes

Is the cylinder solar (or other renewable) compatible? Yes

All appropriate pipes including the vent pipe have been insulated

up to 1metre or the point where they become concealed Yes

Where an installation is notiﬁable in England & Wales this will be made to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A Building Regulations Compliance Certiﬁcate will then be issued to the customer.

©Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk

Commissioning Engineer’s Signature

Customer’s Signature

(To conﬁrm satisfactory demonstration and receipt of manufacturer’s literature)

INDIRECT ONLY

A cylinder thermostat has been ﬁtted in the recommended position Yes

The hot water is controlled by a programmer or time switch Yes

Is the system fully pumped? Yes

Type of control system Y Plan

S Plan Other

18.0 WARRANTY TERMS & CONDITIONS

18.1 DIMPLEX 5YR WARRANTY

1. Registration must be completed within 30 days of installation. Failure to return within 30 days will invalidate your warranty. Registration if effected by returning the enclosed registration card to the commercial center of Dimplex at 5 Spartan Close, Tachbrook Park, Leamington Spa, CV34 6RR. Proof of postage should be obtained.

2. The Benchmark document must be completed by installer/householder at the time of installation and must be presented to our engineer at subsequent visits.

3. The boiler must be serviced annually, at the householders expenses in accordance with manufacturer’s instructions, and this service must be booked through Dimplex by calling 0844 371 1121

4. The service must be carried out by a Dimplex approved central heating engineer. Any work carried out by a non-Dimplex approved engineer will invalidate this warranty.

5. Appropriate system cleaning (e.g. power flush) and the correct use of additives must be carried out at the time of installation. Failure to cleanse the system will invalidate this warranty. Evidence of cleansing should be presented to our engineer upon request.

6. This warranty applies only to manufacturing problems with the boiler; damage caused through misuse, incorrect operation, foreign bodies in the heating system, system faults and failures are not covered.

7. This warranty applies only if the boiler is installed and used in accordance with the manufacturer’s instructions, in normal domestic applications.

8. Providing all the above Terms and Conditions are met, this warranty covers functional parts and labour.

9. Dimplex offer the opportunity for a system audit and commissioning check within 30 days of registration. This is chargeable at the same rate as an annual service and if taken up then the first annual service will be provided free of charge. Failure to take up this offer may invalidate the full warranty which will revert to a standard 2 year warranty which will require an annual service In year 2 in any event.

10. Failure to meet any of the above Terms and Conditions will invalidate this warranty.

48pp MANUAL SPREADS 19/10/10 08:36 Page 2

17.0 BENCHMARK

SERVICE RECORD

It is recommended that your hot water system is serviced regularly and that the appropriate Service Record is completed.

Service Provider

Before completing the appropriate Service Record below,please ensure you have carried out the service as described in the manufacturer’s instructions.

SERVICE 1 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 2 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 3 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 4 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 5 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 6 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 7 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 8 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 9 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

SERVICE 10 Date

Engineer Name

Company Name

TelephoneNumber

Comments

Signature

CONTENTS

SECTION DESCRIPTION PAGE

1.0 Introduction 4

2.0 Boiler Layout 7

3.0 Boiler Operation 8

4.0 Technical Data 9

5.0 Dimensions 10

6.0 System Details 11

7.0 Site Requirements 14

8.0 Flue options 18

9.0 Installation 22

10.0 Commissioning 26

11.0 Service Mode 28

12.0 Servicing & Maintenance 29

13.0 Changing Components 32

14.0 Electrical 40

15.0 Spare Parts 41

16.0 Error Codes 42

17.0 Benchmark 43

18.0 Warranty Terms & Conditions 47

48pp MANUAL SPREADS 19/10/10 08:36 Page 3

1.0 INTRODUCTION

1.1 BUILDING REGULATIONS AND BENCHMARK CHECKLIST

Building Regulations (England & Wales) require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department.

From 1 April 2005 this can be achieved via a Competent Persons Self Certification Scheme as an option to notifying the Local Authority directly.

CORGI operates a Self Certification Scheme for gas heating appliances.

With the introduction of Self Certification Schemes, the Benchmark Logbook is being withdrawn. However, a similar document in the form of a commissioning checklist and service interval record is incorporated at the back of these instructions.

This company is a member of the Benchmark initiative and fully supports the aims of the programme. Its aim is to improve the standards of installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency.

Building Regulations require that installations should comply with manufacturer’s instructions. It is therefore important that the commissioning checklist is completed by the installer. The relevant section of Building Regulations only relates to dwellings. Therefore the checklist only applies if the appliance is being installed in a dwelling or some related structure.

1.2 INSTALLATION, COMMISSIONING, SERVICE & REPAIR

This appliance must be installed in accordance with the manufacturer’s instructions and the regulations in force. Read the instructions fully before installing or using the appliance.

In GB, this must be carried out by a competent person as stated in the Gas Safety (Installation & Use) Regulations.

Definition of competence:

A person who works for a CORGI registered company and holding current certificates in the relevant ACS modules, is deemed competent.

In IE, this must be carried out by a competent person as stated in I.S. 813 “Domestic Gas Installations”

No modifications or changes can be made to this appliance without prior written permission from Dimplex Boilers.

The manufacturers instructions must not be taken as overriding any statutory requirements. If in doubt contact Dimplex Boilers on 0844 3711121.

Warning -

Check the information on the data plate is

compatible with local supply conditions.

All CORGI registered installers carry a CORGI identification card and have a registration number. You can check your installer is registered by telephoning 0870 4012300 or writing to:-

1 Elmwood Chineham Business Park Crockford Lane Basingstoke RG24 8WG

or check online at www.corgi-gas-safety.com

These appliances meet the requirements of; Gas Appliance Directive 90/396/EEC Efficiency of Hot Water Boilers Directive 92/42/EEC Low Voltage Directive 92/42/EEC Electromagnetic Compatibility Directive 92/31/EEC

Type test certified by:- Notified Body 0087 (Pin 87BT49).

Product/Production certified by: Notified Body 0086.

For GB/IE only

17.0 BENCHMARK

MAINS PRESSURE HOT WATER STORAGE SYSTEM COMMISSIONING CHECKLIST

llA installations inEngland and Walesmust be notiﬁed toLocal Authority Building Control(LABC) either directly orthrough a Competent PersonsScheme.

A Building Regulations Compliance Certiﬁcate will then be issued to the customer.

©Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk

ALL SYSTEMS PRIMARY SETTINGS (indirect heating only)

Is the primary circuit a sealed or open vented system? Sealed

Open

What is the maximum primary ﬂow temperature?

°C

ALL SYSTEMS

What is the incoming static cold water pressure at the inlet to the system? bar

Has a strainer been cleaned of installation debris (if ﬁtted)? Yes

Is the installation in a hard water area (above 200ppm)? Yes

If yes, has a water scale reducer been ﬁtted? Yes

What type of scale reducer has been ﬁtted?

What is the hot water thermostat set temperature?

°C

What is the maximum hot water ﬂow rate at set thermostat temperature (measured at high ﬂow outlet)?

l/min

Time and temperature controls have been ﬁtted in compliance with Part L of the Building Regulations? Yes

Typeof control system (if applicable) YPlan

S Plan Other

Is the cylinder solar (or other renewable) compatible? Yes

What is the hot water temperature at the nearest outlet? °C

All appropriate pipes have been insulated up to 1 metre or the point where they become concealed Yes

UNVENTED SYSTEMS ONLY

Where is the pressure reducingvalve situated (if ﬁtted)?

What is the pressure reducing valve setting?

bar

Has a combined temperature and pressure reliefvalve and expansion valve been ﬁtted and discharge tested? Yes No

The tundish and discharge pipework have been connected and terminated to Part G of the Building Regulations Yes

Are all energy sourcesﬁtted with a cut out device? Yes

Has the expansion vessel or internal air space been checked? Yes

THERMAL STORES ONLY

What store temperature is achievable? °C

What is the maximum hot water temperature?

°C

ALL INSTALLATIONS

The hot water system complies with the appropriate Building Regulations Ye s

The system has been installed and commissioned in accordance with the manufacturer’sinstructions Yes

The system controls have been demonstrated to and understood by the customer Yes

The manufacturer’sliterature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes

Commissioning Engineer’sSignature

Customer’sSignature

(To conﬁrm satisfactory demonstration and receipt of manufacturer’s literature)

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

Failure to install and commission this equipment to the manufacturer’sinstructions may invalidate the warranty but does not affect statutory rights.

Customer Name TelephoneNumber

Address

Cylinder Make and Model

Cylinder Serial Number

Commissioned by

(print name) Registered Operative ID Number

Company Name Telephone Number

Company Address

Commissioning Date

To be completed by the customer on receipt of a Building Regulations Compliance Certiﬁcate

Building Regulations Notiﬁcation Number (if applicable)

48pp MANUAL SPREADS 19/10/10 08:36 Page 4

17.0 BENCHMARK

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

Service Provider

Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.

Always use the manufacturer’s speciﬁed spare part when replacing controls.

SERVICE 1 Date

Energy Efﬁciency Checklist completed?

Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 3 Date

Energy Efﬁciency Checklist completed? Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 5 Date

Energy Efﬁciency Checklist completed?

Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 7 Date

Energy Efﬁciency Checklist completed? Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 9 Date

Energy Efﬁciency Checklist completed? Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 2 Date

Energy Efﬁciency Checklist completed?

Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 4 Date

Energy Efﬁciency Checklist completed? Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 6 Date

Energy Efﬁciency Checklist completed?

Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 8 Date

Energy Efﬁciency Checklist completed? Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE 10 Date

Energy Efﬁciency Checklist completed? Yes

Engineer Name

Company Name

Telephone Number

CORGI ID Number

Comments

Signature

SERVICE RECORD

1.0 INTRODUCTION

1.3 LEGISLATION

The appliance is suitable only for installation in GB and IE and should be installed in

accordance with the rules in force, and

only used in a suitably ventilated location.

In GB, the installation must be carried out by a CORGI Registered Installer. It must be carried out in accordance with the relevant requirements of the:

• Gas Safety (Installation & Use) Regulations.

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

• The Water Fittings Regulations or Water Byelaws in Scotland.

• 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.

All systems must be thoroughly flushed and treated with inhibitor (see section 6.2).

Codes of Practice - refer to the most recent version

In GB the following Codes of Practice apply:

Standard Scope

BS 7967 Carbon monoxide in dwellings and the

combustion performance of gas fired appliances

BS 7967-2 Guide for using electronic portable combustion

gas analysers in the measurement of carbon

monoxide and the determination of combustion

performance

BS 7967-3 Guide for responding to measurements obtained

from electronic portable combustion gas

analysers

BS 7967-4 Guide for using electronic portable combustion

gas analysers as part of the process of servicing

and maintenance of gas fired appliances

BS 6891 Gas installation

BS 5546 Installation of hot water supplies for domestic

purposes

BS 5449 Forced circulation hot water systems

BS 6798 Installation of gas fired hot water boilers

BS 5440 Part 1 Flues

BS 5440 Part 2 Ventilation

BS 7074 Expansion vessels and ancillary equipment

for sealed water systems

BS 7593 Treatment of water in domestic hot water

central heating systems

In IE the following Codes of Practice apply:

Standard Scope

I.S. 813 Domestic Gas Installation

The following standards give valuable additional information;

BS 5546 Installation of hot water supplies for domestic

purposes

BS 5449 Forced circulation hot water systems

BS 7074 Expansion vessels and ancillary equipment

for sealed water systems

BS 7593 Treatment of water in domestic hot water

central heating systems

GAS LEAKS DO NOT OPERATE ANY ELECTRICAL SWITCHES, OR USE A NAKED FLAME. TURN OFF THE GAS SUPPLY. VENTILATE THE AREA BY OPENING DOORS AND WINDOWS. CALL OUT YOUR LOCAL GAS SUPPLIER TEL: 0800 111 999

Control of

Substances Hazardous to Health

Under Section 6 of the Health and Safety at Work Act 1974, it is 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 - These can cause irritation to skin, eye and 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.

Gas and Electricity Consumer Council (Energywatch)

Energywatch is an independent organisation, which protects the interests of gas users. If you need advice concerning energy issues, they may be contacted on their consumer help line number: 08459 060708, or via their website; www.energywatch.org.uk.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instructions concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

48pp MANUAL SPREADS 19/10/10 08:36 Page 5

1.0 INTRODUCTION

1. The appliances incorporate a microprocessor based, fully modulating air/gas ratio control system with direct burner ignition. This provides a modulated heat output to either central heating (CH) or domestic hot water (DHW) demands, with internal frost protection provided as standard. The heat exchanger is constructed from stainless steel encased in high temperature polymer.

A combined circulating pump, diverter valve and automatic air vent assembly, pressure gauge, safety valve and system expansion vessel are included.

Isolation valves are fitted to the service connections. The appliances have a DHW flow detection device, which gives priority to DHW demand and proportions the required heating load to the DHW flow rate. An electro-mechanical 24 hour time clock is also fitted as standard.

The boiler has a pump over run feature therefore the central heating system must include either a proprietary automatic bypass valve or a radiator must be fitted with lock shield valves. A separate CH expansion vessel is not required if the total CH system content is less than 84 litres. However one is required for systems with volumes greater than 84 litres; refer to section 6.5. A separate DHW expansion vessel is not required. It is recommended that a drain cock is fitted at the lowest point in the system.

1.5 DESCRIPTION

RF room thermostats etc, are available as optional extras. The integral clock may be removed, however the hole in the fascia must be covered using a fascia blanking panel (part no. 300635).

2. The boiler is set to give a maximum output of:24kW Model - 24kW DHW

19.7kW CH (condensing)

30kW Model - 30kW DHW

25.4kW CH (condensing)

38kW Model - 38kW DHW

32kW CH (condensing)

3. It is designed for use on Natural Gas (G20). A natural gas to propane conversion kit is available for each Dimplex Combi.

4. The boiler is suitable for use only on fully pumped sealed heating systems. Priority is given to domestic hot water.

5. The boiler data badge gives details of the model, serial number and Gas Council number and is situated on the inner door panel. It is visible when the case front panel is lowered. (Fig. 1)

6. The boiler model name and serial number are also shown on the information label on the inside of the fascia. This is for user referen ce.

7. The boiler is intended to be installed in residential / commercial / light industrial E.M.C. environments on a governed meter supply only.

8. The boiler must be installed with one of the purpose designed flues such as the standard horizontal telescopic flue kit, part no. 956120.

9. A

All systems must be thoroughly flushed and treated with

inhibitor (see section 6.2).

1.6 OPTIONAL EXTRAS

• Boiler

• Wall fixing jig

• Templates & ‘Quick Fit’ Guide

• Literature Pack

• Filling Loop

• Plugs and screws

1.7 PACK CONTENTS

1.4 SAFE MANUAL HANDLING

1. The boiler should be handled and lifted by two people. Wear appropriate Personal Protection Equipment e.g. protective gloves, safety footwear etc. Plan your route to minimise the number of turns needed to handle/lift the boiler.

2. Where possible transport the boiler using a sack truck or other suitable trolley. Try to avoid steps, wet or slippery surfaces, unlit areas etc. and take special care on ladders/into lofts.

3. When handling or lifting always use safe techniques - keep your back straight, bend your knees. Don’t twist - move your feet, avoid bending forwards and sideways and keep the load as close to your body as possible.

4. Asses the risks associated with handling and lifting according to the conditions on site. If in doubt seek advice before proceeding. Health and Safety is the responsibility of everyone.

17.0 BENCHMARK

GAS BOILER SYSTEM COMMISSIONING CHECKLIST

CONTROLS Tick the appropriate boxes

Time and Temperature Control to Heating Room Thermostat and Programmable

Load/Weather Optimum Start

Programmer/Timer

Room Thermostat Compensation Control

Time and Temperature Control to Hot Water Cylinder Thermostat and Programmer/Timer Combination Boiler

Heating Zone Valves Fitted Not Required

Hot Water Zone Valves Fitted Not Required

Thermostatic Radiator Valves Fitted Not Required

Automatic Bypass to System Fitted Not Required

Boiler Interlock Provided

ALL SYSTEMS

The system has been ﬂushed and cleaned in accordance with BS7593 and boiler manufacturer’s instructions Yes

What system cleaner was used?

What inhibitor was used? Quantity

litres

CENTRAL HEATING MODE Measure and Record:

Gas Rate

/hr OR

ft3/hr

Burner Operating Pressure (if applicable)

mbar OR Gas Inlet Pressure mbar

Central Heating Flow Temperature

°C

Central Heating Return Temperature

°C

COMBINATION BOILERS ONLY

Is the installation in a hard water area (above 200ppm)? Yes No

If yes, has a water scale reducer been ﬁtted? Yes

What type of scale reducer has been ﬁtted?

DOMESTIC HOT WATER MODE Measure and Record:

Gas Rate

/hr OR

ft3/hr

Burner Operating Pressure (at maximum rate) mbar OR Gas Inlet Pressure (at maximum rate) mbar

Cold Water Inlet Temperature

°C

Hot water has been checked at all outlets Yes

Temperature °C

Water Flow Rate

l/min

CONDENSING BOILERS ONLY

The condensate drain has been installed in accordance with the manufacturer’s instructions and/or BS5546/BS6798 Yes

ALL INSTALLATIONS

If required by the manufacturer, record the following CO

% OR CO ppm OR CO/CO2Ratio

The heating and hot water system complies with the appropriate Building Regulations Yes

The boiler and associated products have been installed and commissioned in accordance with the manufacturer’s instructions Yes

The operation of the boiler and system controls have been demonstrated to and understood by the customer Yes

The manufacturer’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes

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

©Heating and Hotwater Industry Council (HHIC) www.centralheating.co.uk

Commissioning Engineer’s Signature

Customer’s Signature

(Toconﬁrm satisfactory demonstration andreceipt of manufacturer’s literature)

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

Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights.

Customer Name Telephone Number

Address

Boiler Make and Model

Boiler Serial Number

Commissioned by (print name) CORGI ID Number

Company Name Telephone Number

Company Address

Commissioning Date

To be completed by the customer on receipt of a Building Regulations Compliance Certiﬁcate

Building Regulations Notiﬁcation Number (if applicable)

48pp MANUAL SPREADS 19/10/10 08:36 Page 6

16.0 ERROR CODES

The boiler is in an ERROR state when there is an error code flashing on the back lit display.

CH = Cen

tral Heating DHW = Domestic Hot Water BCC = Boiler Chip Card

Press and release the RESET button, the control tries to initiate a restart if

possible

ERROR CODE DESCRIPTION REASON ACTION RESET POSSIBLE

1 Overheated CH Water temperature •Check no air is in heat exchanger/CH system

appliance greater than 105°C •Check plate heat exchanger for blockages Y

•Check CH thermistor

•Check system bypass is functional

4 No flame No flame signal on ignition •Check detection electrode/lead – electrode may require cleaning

•Check spark gap

•Check gas supply & pressure Y

•Check flue system is connected properly

•Check condensate trap not blocked

•Check gas valve and/or lead

5 Flame loss Loss of flame signal •Check detection electrode/lead Y

during operation •Check gas valve mains lead

6 Temporarily Water temperature •Check overheat thermostat

overheated appliance greater than 95°C •Check no air is in heat exchanger/CH system

•CH system and hot water plate heat exchanger blockage Auto Re-start after 1 minute

•Check CH thermistor

•Check system bypass is functional

7 Overheated appliance Flue over temperature •Check no air in heat exchanger

> 92°C •Check flue thermistor

•Check flue system Y

•Check pump

•Check PCB/X8 connector

11 Flame simulation Flame detected when •Check detection electrode/lead electrode may require cleaning Y

gas valve closed •Check gas valve operation.

12 No ignition CH Flow thermistor failure •Check CH flow thermistor – open circuit Auto Re-start when fixed

•Check PCB/X6 connector – open circuit

13 No flame Flue thermistor failure •Check PCB/X8 connector

•Check flue thermistor Auto Re-start when fixed

•Check thermal fuse – open circuit

16 No ignition CH Return thermistor failure •Check CH return thermistor – open circuit Auto Re-start when fixed

•Check PCB/X6 connector – open circuit

20 No flame Gas valve V1-V2 failure •Check/replace gas valve

•Check gas valve harness Y

•Check PCB/X2A

24 Faulty fan signal, Missing or defective •Check fan operation

no flame and fan signal from fan. •Check fan connection Y runs continuously •Check PCB/X3 connector

•Check flue condition

32 No flame Power supply failure •Check mains supply voltage to boiler Auto Re-start when fixed

•Check all PCB connectors

34 CRC Error / No flame Incorrect BCC •Replace correct BCC Auto Re-start when fixed

(BCC’s only fitted to replacement PCB’s)

35 BCC Error / No flame Incorrect/missing BCC •Reseat or replace BCC Auto Re-start when fixed

(BCC’s only fitted to replacement PCB’s)

36 BCC Error / No flame Damaged BCC •Replace BCC Auto Re-start when fixed

(BCC’s only fitted to replacement PCB’s)

37 BCC Error / No flame Different BCC •BCC and PCB software incompatible, replace BCC Auto Re-start when fixed

(BCC’s only fitted to replacement PCB’s)

38 BCC Error / No flame Different BCC •Reset the appliance in accordance with BCC fitting instructions Auto Re-start when fixed

(BCC’s only fitted to replacement PCB’s)

39 BCC Error / No flame BCC installation failed •Refit BCC in accordance with BCC fitting instructions Auto Re-start when fixed

(BCC’s only fitted to replacement PCB’s)

41 Water flow failure/ Low water pressure •Check CH flow circulation

Flame for a short Reversed sensors •Check water pressure(> 0.5 bar) period only •Check pump/lead Y

•Check expansion vessel

•Check flow and return sensors connected correct way around

42 Water flow failure/ Low water pressure •Check no air in heat exchanger

Flame for a short No flow •Check CH flow circulation period only Dry run protection •Check water pressure(> 0.5 bar) Y

•Check pump/lead

•Check expansion vessel 50 BCC Error / No flame BCC Activation •Press reset to activate BCC (BCC’s only fitted to replacement PCB’s) Y No light DHW cold Defective DHW flow switch •Check DHW flow turbine & lead Auto Re-start display when or defective •Check DHW/CH thermistor when fixed tap on DHW/CH thermistor •Check PCB/X4 connector (No display) No light indication Defective power supply •Check power supply

•Check PCB/X1B connector Auto Re-start when fixed

•Check PCB fuse

2.0 BOILER LAYOUT

2.1 KEY

1. Expansion Vessel

2. Automatic Air Vent

3. DHW Plate Heat Exchanger

4. Circulation Pump

5. Drain Off Point

6. Pressure Relief Valve

7. Central Heating System Pressure Gauge

8. PCB

9. Control Box

10. 3-Way Valve Assembly

11. Flexible condensate pipe assembly

12. Flame Sensing Electrode

13. Spark Electrode

14. Primary Heat Exchanger

15. Fan Assembly

16. Gas Valve & Swirl Plate Assembly

17. Reset Button

18. Central Heating Temperature Control

19. Hot Water Temperature Control

20. Air / Gas Channel

21. Burner & Burner Door

22. Spark Generator

23. Data Badge

24. Flue Sample Point

25. Manual Air Vent

26. Burner On Light

27. Central Heating Mode Light

28. Domestic Hot Water Mode Light

29. Display

30. Integral Timer

31. Flue Thermistor

32. Thermal Fuse

33. Comfort + / Eco Mode Light

m fort +

2 1

2 2

b a r

Comfort +

bar

Fig. 1

17 29 33 1927

1830 2628

48pp MANUAL SPREADS 19/10/10 08:36 Page 7

3.0 BOILER OPERATION

3.1 CENTRAL HEATING MODE

1. With a demand for heating, the pump, circulates water through the primary circuit.

2. Once the main burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensors.

3. When the demand is satisfied the burner is extinguished and a 5 minute delay occurs before the burner will re-light (anticycling), the pump continues to run for a period of 2 minutes (Pump Overrun).

3.2 DOMESTIC HOT WATER MODE

1. Priority is given to the domestic hot water supply. A demand at a tap or shower will override any central heating requirement.

2. The flow of water will operate the Flow Turbine which requests the 3 way valve to change position. This will allow the pump to circulate the primary water through the DHW plate heat exchanger.

3. The burner will light automatically and the temperature of the domestic hot water is controlled by the temperature sensors.

4. When the domestic hot water demand ceases the burner will extinguish and the diverter valve will remain in the domestic hot water mode, unless there is demand for central heating.

3.3 FROST PROTECTION MODE

1. Providing there is mains power supply to the appliance, the frost protection mode is integral. If the system temperature falls below 5°C then the boiler will fire on its minimum setting until a flow temperature of 20°C is reached. Further protection can be incorporated by using a system frost thermostat.

3.4 PUMP PROTECTION

1. The pump will automatically operate for 1 minute in every 24 hours to prevent sticking.

Expansion

Vessel

Primary

Heat Exchanger

Burner &

Burner Flange

Primary Flow

Primary Return

CH flow

Thermistor

CH return Thermistor

Plate Heat Exchanger

Condensate

Trap

Pressure

Gauge

Flow

Turbine

DHW Cold

Inlet

Return

3 BAR

Pressure Relief

Valve

DHW Hot

Outlet

Pump &

Hydroblock

Automatic

Air

Vent

Flow

Flue Products

CH Mode Manual

Bleed Valve

Expansion

Vessel

Primary

Heat Exchanger

Burner &

Burner Flange

Primary Flow

Primary Return

CH flow

Thermistor

CH return

Thermistor

Plate Heat Exchanger

Condensate

Trap

Pressure

Gauge

Flow

Turbine

DHW Cold

Inlet

Return

3 BAR

Pressure Relief

Valve

DHW Hot

Outlet

Pump &

Hydroblock

Automatic

Air

Vent

Flow

Flue Products

DHW Mode Manual

Bleed Valve

Flow Rate Restrictor

Fig. 2

Fig. 3

15.0 SPARE PARTS

15.1 SHORT PARTS LIST

Key GC Number Description QTY Pt. No.

1 H29-740 Electrode - Ignition c/w Gasket 1 988526 2 H38-213 Detection Electrode c/w Gasket 1 988540 3 H29-236 Spark Generator c/w Lead 1 500665 4a TBA Dimplex Combi 24 gas control valve assembly NG 1 988660 4b TBA Dimplex Combi 30 gas control valve assembly NG 1 988661 4c TBA Dimplex Combi 38 gas control valve assembly NG 1 988662 5 H38-215 Fan Assembly 1 601016 6a H29-171 Burner (Combi 24) 1 700600 6b H29-172 Burner (Combi 30) 1 700601 6c TBA Burner (Combi 30) 1 700602 7 TBA Burner Door Insulation 1 352671 8a H38-217 Heat Exchanger (Combi 24) 1 451101 8b H38-218 Heat Exchanger (Combi 30) 1 451100 8c TBA Heat Exchanger (Combi 38) 1 451151 9 H29-202 Pump Head 6m 1 500672 10 H29-203 Diverter valve Motorised Head 1 500750 11 H29-237 Expansion Vessel 1 451020 12 TBA 3 Bar Pressure Relief valve 1 500751 13 H29-213 Water Temperature sensor 2 500661 14 H38-219 Flue Thermistor 1 500662 15a TBA Dimplex Combi 24kW Plate Heat exchanger kit 1 988671 15b TBA Dimplex Combi 30kW Plate Heat exchanger kit 1 988672 15c TBA Dimplex Combi 38kW Plate Heat exchanger kit 1 988673 16 E23-541 Pressure Gauge 4bar 1 450961 17 TBA Auto Air Vent 1 500752 18a TBA Dimplex Combi 24 NG PCB Kit 1 988663 18b TBA Dimplex Combi 30 NG PCB Kit 1 988664 18c TBA Dimplex Combi 38 NG PCB Kit 1 988665 19 E23-671 Time Clock - Grasslin FM1STUH 1 600520 20 TBA DHW Flow Turbine 1 300766 21a TBA DHW Flow Regulator (Combi 24) 1 300717 21b TBA DHW Flow Regulator (Combi 30) 1 300715 21c TBA DHW Flow Regulator (Combi 35) 1 300719 22 H29-179 Valve - Manual Bleed 1 300730 23 H38-226 Heat Exchanger seal & Clip Kit 1 988546 24 H29-208 Hydroblock - O-Ring and Clip 1 988669 25 TBA Hydroblock Manual bleed cock 1 500708

48pp MANUAL SPREADS 19/10/10 08:36 Page 8

14.0 ELECTRICAL

14.1 ILLUSTRATED WIRING DIAGRAM

g/y

L2 L1N

X1A CH7 RT CLOCK

24Hr TIME CLOCK

LCD DISPLAY

RIBBON TO PCB

RIBBON TO LCD DISPLAY

MAINS POWER

GAS VALVES 230Vac

FAN 230Vac

RETURN TEMP THERMISTER (5K NTC)

BOILER TO PC COM PORT

FLOW TEMP THERMISTER (5K NTC)

BOILER PUMP 230Vac

FLOW TURBINE 230Vac

DETECTION ELECTRODE

IGNITION ELECTRODE

SPARK GENERATOR 230Vac

ROOMSTAT OR LINK

X1B MAINS

X1C BOILER PUMP

X2A GAS VALVES

X3 FAN

X5 COM PORT

X6 FLOW N.T.C.

BOILER CHIP CARD BCC

X6 RETURN N.T.C.

X2B IGNITER / FLAME SENSOR

FLUE TEMP THERMISTER (5K NTC)

THERMAL FUSE

Key - Cable Colours

g Green y Yellow b Blue r Red bk Black o Orange g/y Green / Yellow br Brown gr Grey w White

g/y

X8 FAN CONTROL

X8 FLUE

X8 DHW FLOW

(IF FITTED)

X4 HYDROBLOCK DIVERTER

o b g/y r br

Appliance Classification C13, C33, C53, B23

Appliance Combi 24 Combi 30 Combi 38

Mode Rate Central Heating Output (non-condensing)(80-60°C) Max kW 18.0 23.3 30.0

Min kW 6.0 7.4 9.8

Central Heating Output (condensing)(50-30°C) Max kW 19.5 25.3 32.7

Central Heating Input Max Rate Net kW 18.4 23.9 30.6

Gross kW 20.4 26.5 34.0

Central Heating Input Min Rate Net kW 5.6 6.9 9.2

Gross kW 6.2 7.7 10.2

Domestic Hot Water Output Max kW 24.0 30.4 38.0

Min kW 6.0 7.4 9.8

Domestic Hot Water Input Max Rate Net kW 24.6 31.3 38.8

Gross kW 27.3 34.7 43.1

Domestic Hot Water Input Min Rate Net kW 5.6 6.9 9.2

Gross kW 6.2 7.7 10.2

Central Heating Gas Rate (after 10 min operation - hot) Max m

/h 1.95 2.49 3.24 Domestic Hot Water Gas Rate (after 10 min operation - hot) Max m3/h 2.6 3.31 4.1 Seasonal Efficiency % 90.3 90.3 90.5 Seasonal Efficiency (SEDBUK) Band “A” “A” “A” Nox Classification Class “5” “5” “5” Design Domestic Hot Water Performance raised 35°C Ltr/min 9.8 12.3 15.6 DHW Specific Rate (D) EN 625 Ltr/min 10.9 14.7 18.1 Min Mains Water Inlet Pressure for Max Heat Output Bar 1.0 1.0 1.0 Min Mains Water Inlet Pressure for Operation Bar 0.3 0.3 0.3 Max Mains Water Inlet Pressure Bar 10 10 10 Min Domestic Hot Water Flow Rate for Operation Ltr/min 2.0 2.0 2.5 Min Central Heating System Pressure Bar 0.5 0.5 0.5 Max Central Heating System Pressure Bar 2.5 2.5 2.5 Max Domestic Hot Water Temperature °C 60 60 60 Min Domestic Hot Water Temperature °C 40 40 40 Max Central Heating Flow Temperature °C 80 80 80 Min Central Heating Flow Temperature °C 30 30 30

General Specifications

Max lift weight kg 33.6 36.6 39.6 Total water capacity Ltr 1.8 2.1 3.1 Integral expansion vessel capacity Ltr 8 8 8 Maximum heating system water content using fitted expansion vessel, @ 0.75 bar Ltr 84 84 84 Electrical supply 230V 50Hz Fuse at 3A Internal fuse T4H 4A 250V Maximum power consumption W 125 140 146 IP Rating IPX4 IPX4 IPX4 Flue gas temperature Nat Gas 80/80 (Propane) °C 80 80 80 Flue gas temperature Nat Gas 50/30 °C 70 75 77

CO2value max rate (Nat Gas) (Case must be fitted when taking reading) % 8.8-9.2 9.1-9.5 8.9-9.3 CO2value min rate (Nat Gas) (Case must be fitted when taking reading) % 8.2-8.6 8.7-9.1 8.3-8.7 CO value max rate (Nat Gas) (Case must be fitted when taking reading) P.P.M 40-120 40-120 40-120 CO value min rate (Nat Gas) (Case must be fitted when taking reading) P.P.M 0-40 0-40 0-30

CO2 value max rate (Propane) (Case must be fitted when taking reading) % 10.5-10.9 10.7-11.1 10.5-10.9 CO2value min rate (Propane) (Case must be fitted when taking reading) % 10.2-10.6 10.2-10.6 10.4-10.8 CO value max rate (Propane) (Case must be fitted when taking reading) P.P.M 80-160 100-180 70-150 CO value min rate (Propane) (Case must be fitted when taking reading) P.P.M 0-40 0-40 0-40

Gas Pressure - Natural Gas mbar 18-20 18-20 18-20 Gas Pressure - Propane mbar 37 37 37

Connections

Gas 22 mm compression CH flow 22 mm compression CH return 22 mm compression DHW inlet 15 mm compression DHW outlet 15 mm compression Pressure relief valve outlet 15 mm compression Condensate Drain 21.5 - 22 mm plastic overflow pipe

P.P.M = Parts Per Million

4.0 TECHNICAL DATA

4.1 PERFORMANCE DATA

48pp MANUAL SPREADS 19/10/10 08:36 Page 9

5.0 DIMENSIONS

65mm 60mm 60mm 65mm

10mm

Condensate

Drain

CH Flow

(22mm)

Domestic Hot Water Outlet

(15mm)

Gas Inlet (22mm)

Mains Cold Water Inlet

(15mm)

CH Return

(22mm)

Tap Rail

446mm

264mm 182mm

796mm

150mm

94mm

333mm

148mm185mm

1.5° - 3.0°

Tube Ø 100mm

Fig. 4

Fig. 5

13.0 CHANGING COMPONENTS

13.18 PCB

1. Ensure supply voltage is fully isolated.

2. Undo the screws holding the control box and gently ease the box forward (Fig. 69).

3. Locate the retaining barbs on the top of the fascia and unclip them from the control box.

4. Unclip the PCB from the plastic control box.

5. Note the positions of all the connections on the PCB and disconnect them. (DO NOT REMOVE THE YELLOW BCC (Fig. 69))

6. Carefully unclip and remove the ribbon cable from the PCB and withdraw.

7. Fit all the connection plugs to the new PCB including the ribbon cable, take care not to damage the PCB.

8. Unless specifically instructed N

NOT

to do so by the Dimplex Service Department, always fit the new BCC if supplied with the replacement PCB.

NOTE:

Always double check the label on the BCC card to ensure it is the correct BCC for the boiler model to which it is being fitted. Never fit an incorrect BCC, as this is extremely dangerous and could result in serious injury or death.

9. Reassemble in reverse order, ensuring that the control knob are reset to their previous positions

13.19 BCC

1. Ensure supply voltage is fully isolated.

2. Dismantle the control box as described above to gain access to the PCB (Fig. 69).

3. Note the orientation of the existing BCC (if fitted) and carefully remove by sliding it off the edge of the PCB.

4. Re-fit the new BCC by sliding it onto the edge of the PCB, ensuring the orientation is correct.

NOTE:

Always double check the label on the BCC card to ensure it is the correct BCC for the boiler model to which it is being fitted.

NEVER FIT AN INCORRECT BCC.

5. Reassemble as above.

6. Power up boiler, and briefly press the reset button, wait for at least 5 seconds and then briefly press the reset button again.

7. The boiler should now be checked for operation in DHW and CH modes.

PCB

Facia

Control Box

Retaining Barbs

Pressure

Gauge

Timer

User Interface

Control Knobs

Fig. 69

BCC

48pp MANUAL SPREADS 19/10/10 08:36 Page 10

13.0 CHANGING COMPONENTS

13.16 EXPANSION VESSEL

1. Drain the primary circuit and undo the nut on the vessel connection pipe.

2. Remove the two screws holding the retaining bracket and remove the bracket (Fig. 67).

3. Carefully slide out the vessel from the boiler.

4. Reassemble in reverse order.

Expansion Vessel

Vessel Connection Pipe

Retaining

Bracket

Fig. 67

Fig. 68

Flue Elbow

Flue Adaptor

Main Heat Exchanger

Left Hand Retaining Bracket

Right Hand Retaining Bracket

Flow Pipe Retaining Clip

Return Pipe Retaining Clip

Manual Air Vent

13.17 MAIN HEAT EXCHANGER

1. Drain the primary circuit.

2. Remove the electrode leads, noting their positions as described in section 13.2.

3. Remove the valve and fan assembly as described in Section

13.3.

4. Examine the gasket and replace if necessary.

5. Undo the four nuts securing the burner door and remove the cover plate from the heat exchanger.

6. Remove the two clips from the flow and return pipes on the bottom of the heat exchanger and slide out the pipes (Fig. 68).

7. Remove the clip holding the manual air vent and remove the pipe from the top of the heat exchanger.

8. Remove the four screws holding the left and right hand retaining brackets and remove the brackets.

9. Remove the four screws securing the flue to the top of the boiler. Lift the flue adaptor out of the flue outlet in the top of the heat exchanger.

10. Carefully slide the heat exchanger out of the boiler.

11. Reassemble in reverse order.

6.0 SYSTEM DETAILS

6.1 INFORMATION

1. The Dimplex Combi is a ‘Water Byelaws Scheme - Approved Product’. Reference to the Water Research Council publications, ‘Water fittings and materials directory’ and ‘Water supply byelaws guide’ give full details of byelaws and the IRNs.

6.3 SYSTEM CONTROL

1. The boiler is fitted with an integral mechanical timer.

2. It is recommended that external controls e.g. room thermostat are fitted to further improve the operating efficiency of the boiler and system.

6.2 CENTRAL HEATING CIRCUIT

1. The appliance is suitable for fully pumped SEALED SYSTEMS ONLY.

Treatment of Water Circulating Systems

Failure to flush and add inhibitor to the system will invalidate the appliance warranty.

• Central heating water systems will be subject to corrosion unless an appropriate water treatment is applied. This means that the efficiency of the system will deteriorate as corrosion sludge accumulates within the system, risking damage to pump and valves, boiler noise and circulation problems.

• When fitting new systems flux will be evident within the system, which can lead to damage of system components.

• All systems must be thoroughly drained and flushed out. Using, for example Betz-Dearborn Sentinel X300 or X400 or Fernox Superfloc Universal Cleanser. They should be used following the flushing agent manufacturer’s instructions.

• System additives - corrosion inhibitors and flushing agents/descalers should comply to BS7593 requirements, e.g. Betz-Dearborn Sentinel X300 and Femox-Copal which should be used following the inhibitor manufacturer’s instructions.

• It is important to check the inhibitor concentration after installation, system modification and at every service in accordance with the manufacturer’s instructions. (Test kits are available from inhibitor stockists.)

• For information or advice regarding any of the above contact Technical Enquiries - Tel: 0844 3711121.

• If thermostatic radiator valves are fitted, a radiator must be fitted with two lock shield valves or the system must include a proprietary automatic bypass valve, to enable correct operation of the pump over-run facility.

48pp MANUAL SPREADS 19/10/10 08:36 Page 11

6.0 SYSTEM DETAILS

6.4 SYSTEM FILLING AND PRESSURISING

1. A filling point connection on the central heating return pipework must be provided for initial filling and pressurising and subsequent topping up of the system.

A filling loop is provided loose with the boiler

2. The filling method adopted must comply with all relevant water supply regulations and use approved equipment.

3. Further details are given in; for GB: Guidance G24.2 and recommendation R24.2 of the Water Regulations Guide. for IE: the current edition of I.S. 813 “Domestic Gas Installations”.

4. The sealed primary circuits may be filled or topped up using a temporary connection between the circuit and a supply pipe, provided a ‘Listed’ double check valve or some other no less effective backflow prevention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use.

6.5 EXPANSION VESSEL (CENTRAL HEATING ONLY)

1. The appliance expansion vessel is pre-charged to 1 bar. Therefore the minimum cold fill pressure is 2 bar. The vessel is suitable for correct operation for system capacities up to 84 litres. For greater system capacities an additional expansion vessel must be fitted. For GB refer to BS 7074 Pt 1. For IE, the current edition of I.S. 813 “Domestic Gas Installations”.

6.6 PRESSURE RELIEF VALVE

1. The pressure relief valve is set at 3 bar, therefore all pipework, fittings, etc. should be suitable for pressures in excess of 3 bar and temperature greater than 100°C.

2. The pressure relief discharge pipe should be not less than 15mm diameter, run continuously downward, and discharge outside the building, preferably over a drain. It should be routed in such a manner that no hazard occurs to occupants or causes damage to wiring or electrical components. The end of the pipe should terminate facing down and towards the wall.

NOTE: Boiling water/steam could discharge from the pipe, therefore it should be terminated away from windows and doors.

DHW Mains Inlet

Return

Pressure Relief Discharge Pipe

Temporary

Loop

Stop

Valve

Stop Valve

Double Check

Valve

GasDHW

Outlet

Flow

Condensate

Dimplex Combi Range Available Head

Flow L/Min

Available Head M

7.00

0 5 10 15 20

6.00

5.00

4.00

3.00

2.00

1.00

0.00

Dimplex Combi

Fig. 8

Fig. 7

Expansion Vessel

Pressure Relief Valve

Vessel charge and initial system pressure

Total water content of system using 8 litres capacity expansion vessel supplied with appliance

For systems having a larger capacity multiply the total system capacity in litres by this factor to obtain the total minimum expansion vessel capacity required in litres

bar

litres

0.5960.75

0.093

1.0731.5

Fig. 6

Fig. 9

NOTE: Do not use the pressure relief valve to drain the system, because dirt and debris could prevent the valve seating correctly.

13.0 CHANGING COMPONENTS

13.12 AUTOMATIC AIR VENT

1. Drain the primary circuit and rotate the automatic air vent

turn and remove from the pump body.

2. Examine the ‘O’ ring seal, replacing if necessary, and fit it to the new automatic air vent.

3. Reassemble in reverse order.

13.13 PRESSURE GAUGE

1. Drain the primary circuit and undo the nut on the pressure gauge capillary.

2. Examine the ‘O’ ring seal, replace if necessary.

3. Unclip the facia from the control box

4. Lever the barbs securing the gauge to remove the gauge from the control box (Fig. 64).

5. Reassemble in reverse order.

13.14 PRESSURE RELIEF VALVE

1. Drain the primary circuit.

2. Disconnect the discharge pipe from the valve. Ease off the retaining clip (Fig. 65).

3. Note the orientation of the valve, rotate it and withdraw it from the manifold.

4. Fit the new valve and ‘O’ ring and set to the previously noted orientation. Reassemble in reverse order.

Fig. 64

Fig. 65

Automatic Air Vent

‘O’ Ring

Pressure Gauge

Pressure

Relief Valve

Retaining Clip

‘O’ Ring

Discharge Pipe

Capillary

‘O’ Ring

13.15 PLATE HEAT EXCHANGER

1. Drain the primary circuit.

2. While supporting the heat exchanger undo the two screws securing it to the plastic manifold.

3. Hold the heat exchanger at the right hand side and rotate it upwards. Withdraw it from the boiler over the gas valve.

Seals

4. There are four seals between the manifolds and heat exchanger which may need replacement (Fig. 65).

5. Ease the seals out of the manifold. Replace carefully, ensuring that when the seal is inserted into the manifold it is parallel and pushed fully in.

6. When re-assembling ensure that the ‘V’ pattern on the heat exchanger points to the right hand side of the boiler.

7. Reassemble in reverse order.

Plate Heat Exchanger

Seal

Fig. 66

48pp MANUAL SPREADS 19/10/10 08:36 Page 12

13.0 CHANGING COMPONENTS

13.10 PUMP - HEAD ONLY

1. Drain the primary circuit and disconnect the wiring connector from the pump head.

2. Remove the four socket head screws securing the pump head to the body and draw the head away (Fig. 62).

3. A replacement Grundfos 15-60 head can now be fitted (Fig. 62)(Part No: 500672).

4. Reassemble in reverse order.

5. Replace the wiring connector into the socket on the pump head.

13.11 HYDROBLOCK

1. Drain the primary circuit.

2. Remove the four stainless clips at the base of the hydroblock and disconnect the four pipes (Fig. 63).

3. Un-lock the two locking clips on the flow and return ports.

4. Disconnect the discharge pipe from the pressure relief valve.

5. Remove the four securing screws from below the boiler.

6. Carefully remove the hydro-block and change the relevant components.

7. Reassemble in reverse order taking care to replace all the clips correctly. Ensure the locking clips are in the ‘Locked’ position as shown opposite.

Pump Head

Locking Clip

Front

Stainless Clips

Rear

Stainless Clips

Un-Locked

(viewed from pipe end)

Locked

(viewed from pipe end)

X 4

X 2

Fig. 62

Fig. 63

6.0 SYSTEM DETAILS

6.7 DOMESTIC HOT WATER CIRCUIT

1. All DHW circuits, connections, fittings, etc. should be fully in accordance with relevant standards and water supply regulations.

2. Further guidance is given in: for GB: Guidance G17 to G24 and recommendation R17 to R24 of the Water Regulations Guide. for IE: the current edition of I.S. 813 “Domestic Gas Installations”.

3. When the domestic water system includes any device which prevents water expanding back towards the supply (check valve, loose jumpered stopcock, water meter, water treatment device) then an expansion vessel must be fitted (e.g. Zilmet 160ml, R1/215bar). A single check valve must be fitted as shown in Fig. 10 to prevent backflow to the supply pipe and to ensure the efficient operation of the expansion vessel which is required to accommodate the thermal expansion of the water. If the hot water expansion is not provided for, then high pressures can develop which may result in damage to fittings and devices on the system.

4. The boiler’s maximum working mains pressure is 10 bar, therefore all pipework, connections, fittings, etc. should be suitable for pressure in excess of 10 bar. A pressure reducing valve must be fitted for pressures in excess of 10 bar.

5. The final 600mm of the cold mains supply and domestic hot water outlet must be made in 15mm copper pipe.

6. A cold mains flow regulator is fitted on the inlet to the flow turbine (see Figs. 2 & 3 - page 8) to control water flow rates. This may be removed to obtain higher flow rates. Flow rates higher than specified for the appliance will reduce the domestic hot water temperature.

6.8 SHOWERS

1. If a shower control is supplied from the appliance it should be of the thermostatic or pressure balanced type. Thermostatic type shower valves provide comfort and guard against high water temperatures. Existing controls may not be suitable refer to the shower valve manufacturer.

6.9 HARD WATER AREAS

1. If the area of the installation is recognised as a HARD WATER AREA then a suitable device should be fitted to treat the mains water supply to the boiler. Contact your Water Distribution Company for advice on suitable devices.

Expansion

Vessel

Boiler

Check

Valv e

Stop Tap

Pressure

Reducer

Valv e

To Hot

Tap s

Other Tap

Outlets

Fig. 10

48pp MANUAL SPREADS 19/10/10 08:36 Page 13

7.0 SITE REQUIREMENTS

7.1 LOCATION

1. The boiler may be fitted to any suitable wall with the flue passing through an outside wall or roof and discharging to atmosphere in a position permitting satisfactory removal of combustion products and providing an adequate air supply. The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i.e. garage or outhouse. (The boiler may be fitted inside an unvented cupboard - see section

7.3).

2. If the boiler is fitted in a room containing a bath or shower reference must be made to the relevant requirements. 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 current ETCI rules.

(Fig. 11 shows zone dimensions for a bathtub. For other examples refer to Section 601 of the current I.E.E. Wiring Regulations) reference must be made to the relevant requirements. The boiler is IPX4 rated and can be fitted in Zone 2 (Fig. 11). 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.

4. If the boiler is to be fitted into a building of timber frame construction then reference must be made to the current edition of Institute of Gas Engineers Publication IGE/UP/7 (Gas Installations in Timber Framed Housing).

7.2 CLEARANCES

1. A flat vertical area is required for the installation of the boiler.

2. These dimensions include the necessary clearance around the boiler for case removal, spanner access and air movement. Additional clearances may be required for the passage of pipes around local obstructions such as joists running parallel to the front face of the boiler.

Zone 2

Zone 1

Zone 0

Zone 3

Window Recess

Zone 2

Window Recess

Zone 2

0.6 m 2.4 m

Zone 2 Zone 3

Zone 2Zone 1

Zone 0

Zone 3

Outside Zones

Ceiling

Window

Recess Zone 2

3.0 m

2.25 m

0.6 m 2.4 m

285mm Wall

450mm Min

For Servicing

Purposes

5mm Min In Operation

2.5°

5mm Min

446mm

5mm Min

796mm

200mm

5mm Min

285mm Wall

Fig. 11

Fig. 12

13.0 CHANGING COMPONENTS

13.6 FLUE/HEAT TEMPERATURE THERMOSTAT

1. Disconnect the electrical plug.

2. Turn the sensor 90° anticlockwise to remove - it is a bayonet connection (Fig. 60).

3. Reassemble in reverse order.

13.7 THERMAL FUSE

1. The thermal fuse is non-changeable. If the fuse fails contact Dimplex Technical Department.

13.8 CENTRAL HEATING FLOW TEMPERATURE THERMISTOR

1. Disconnect the electrical plug.

2. Ease the sensor clip away from the pipe and remove (Fig. 61).

3. Reassemble in reverse order.

13.9 CENTRAL HEATING RETURN TEMPERATURE THERMISTOR

1. Disconnect the electrical plug.

2. Ease the sensor clip away from the pipe and remove (Fig. 61).

3. Reassemble in reverse order.

C o m f

o r t +

2 1

2 2

2 3

b a r

Fig. 60

Fig. 61

‘O’ Ring

Thermal Fuse

Central Heating Flow

Temperature Thermistor

Central Heating Return

Temperature Thermistor

Flue/Heat Temperature

Thermostat

48pp MANUAL SPREADS 19/10/10 08:36 Page 14

13.0 CHANGING COMPONENTS

13.4 BURNER

1. Remove the valve and fan assembly as described in Section

13.3.

2. Examine the gasket and replace if necessary.

3. Undo the four nuts securing the burner door and remove from the heat exchanger.

4. Slowly withdraw the burner from the burner plate taking care not to damage the insulation (Fig. 58).

5. Reassemble in reverse order.

13.5 INSULATION

1. Remove the electrode leads, noting their positions. Remove the electrodes as described in section 13.2.

2. Remove the valve and fan assembly as described in Section

13.3.

3. Examine the gasket and replace if necessary.

4. Undo the four nuts securing the burner door and remove from the heat exchanger.

5. Slowly withdraw the burner from the burner door.

6. Replace the insulation if necessary.

7. Check the burner door seals.

8. The rear insulation is retained by a screw and large washer, remove these and draw the insulation out of the heat exchanger (Fig. 59).

9. Reassemble in reverse order.

Burner

Insulation

Gasket

Air/Gas Channel

Rear Insulation

Washer

Insulation

Retaining Screw

Burner Assembly

Burner Door

Burner Door Seal

Fig. 58

Fig. 59

Inner Seal

7.0 SITE REQUIREMENTS

7.3 VENTILATION OF COMPARTMENTS

1. Where the appliance is installed in a cupboard or compartment, no air vents are required. Where an open flued system is used - Flue kit E (B23 classification) then an air vent communicating directly with outside air must be provided in the same room or internal space of the flue duct air inlet. Minimum free area:

Dimplex 24 = 88cm

Dimplex 30 = 121.5cm

Dimplex 38 = 159cm

In addition if an open flued system is used - Flue kit (B23 classification) and the boiler is fitted in a compartment, then high and low level ventilation is required. BS 5440-2:2000 gives guidance on compartmental ventilation.

2. When the boiler is installed in a cupboard or compartment and either flue kit A, B, C, D or F (Classification C13, C33, C53) is used, then no compartmental ventilation is required.

7.4 GAS SUPPLY

1. The gas installation should be 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”.

2. The connection to the appliance is a 22mm copper tail located at the rear of the gas service cock (Fig. 13).

3. Ensure that the pipework from the meter to the appliance is of adequate size, and the demands of any other gas appliance in the property are taken into consideration. Do not use pipes of a smaller diameter than the boiler gas connection (22mm).

4. For boilers connected to use LPG (propane), the inlet pressure must be 37mbar.

NOTE:

The completed installation should always be tested for gas tightness

7.5 ELECTRICAL SUPPLY

1. External wiring must be correctly earthed, polarised and in accordance with relevant regulations/rules. In GB this is the current I.E.E. Wiring Regulations. In IE reference should be made to the current edition of the ETGI rules.

2. The mains supply is 230V - 50Hz fused at 3A

NOTE:

The mains supply connection must allow complete electrical isolation of the appliance and system controls only. Connection may be via a fused double-pole isolator with a contact separation of at least 3mm in all poles and servicing the boiler and system controls only. Any additional mains cable should comply fully with the current I.E.E. wiring regulations.

Fig. 13

Gas Service

Cock

48pp MANUAL SPREADS 19/10/10 08:36 Page 15

7.0 SITE REQUIREMENTS

7.6 CONDENSATE DRAIN

NOTE:

The appliance is fitted with a trap the depth of which is >= 75mm, therefore no other traps are required in the condensate run.

The condensation discharge pipe must not rise at any point along its length. There MUST be a fall of AT LEAST 2.5° (50mm per metre) along the entire run.

1. The condensate outlet will accept 21.5mm (3/4in) plastic overflow pipe which should discharge internally into the household drainage system, downstream of all other traps. if this is not possible, discharge into an outside drain is acceptable.

2. Ensure the discharge of condensate complies with any national or local regulations in force.

BS 6798:2000 & Part HI of the Building Regulations give further guidance.

3. Metal pipework is NOT suitable for use in condensate discharge systems.

4. The pipe should be a minimum of 21.5mm diameter and must be supported properly.

5. I

It is advisable to keep the condensate pipe internal.

6. E

External runs greater than 3 metres or runs in cold areas

should use 32mm waste pipe.

7. If the boiler is fitted in an unheated location the entire condensate discharge pipe should be treated as an external run.

8. In all cases discharge pipe must be installed to aid disposal of the condensate.

9. When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered. If soil pipes or waste pipes are subjected to internal pressure fluctuations when WC’s are flushed or sinks emptied then back-pressure may force water out of the boiler trap and cause appliance lockout. Examples are shown of the following methods of terminations:i) to an internal soil & vent pipe ii) via and internal discharge branch (e.g. sink waste) iii) to a drain or gully iv) to a purpose made soakaway

10. In exceptional circumstances, such as when a boiler is installed in a basement without drainage, it may be necessary to install a condensate pump to carry condensate up to ground/ drain level. Such products are available from most plumbing merchants. For help with selecting a condensate pump contact Dimplex Boilers - Tel: 0844 3711121.

WARNING:

There must be no air breaks in the condensate

pipework or drainage system.

50mm per metre of pipe run

2.5° Minimum fall

450mm min

Termination to an internal soil and vent pipe

50mm per metre of pipe run

2.5° Minimum fall

External termination via internal discharge branch

e.g sink waste - downstream

Sink

Pipe must terminate above water level but below surrounding surface.

50mm per metre of pipe run

2.5° Minimum fall

Termination to a purpose made soak-away

Holes in the soak-away must face away from the building

500mm min

NOT ALLOWED

There should be

no air gap

Fig. 14

Fig. 15

Fig. 17

Fig. 16

13.0 CHANGING COMPONENTS

13.3 GAS VALVE AND FAN

1. Disconnect the two leads to the fan and one lead to the gas valve.

2. Undo the nut on the gas inlet pipe to the valve and retain the sealing washer.

3. Remove the three securing screws holding the air/gas Channel to the burner door plate and remove the valve and fan assembly (Fig. 57).

4. Remove the three screws holding the valve and swirl plate to the fan adaptor plate.

NOTE:

Mark on the adaptor plate which holes are being used by the screws. Using the wrong holes on re-assembly will cause mis-alignment of the gas valve.

Fan Only

6. Remove the three screws holding the fan adaptor to the fan.

7. Remove the four screws securing the fan to the air/gas channel. Reassemble in reverse order ensuring all seals are in place.

NOTE:

The gas valve throttle should be adjusted in accordance with the instructions supplied in the spares kit See Section 10.

NOTE:

Dimplex Combi 38 will also be fitted with a black plastic air cowl which encases the swirl plate.

Fig. 57

Swirl Plate

Fan

Fan Gasket

Burner Door

Air/Gas Channel

Fan Adaptor Plate

Injector Plate

Injector

Injector ‘O’ Ring

Gas Valve

48pp MANUAL SPREADS 19/10/10 08:36 Page 16

13.0 CHANGING COMPONENTS

IMPORTANT:

When changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started.

See Section 12 : “Annual Servicing” for removal of case, panel, door etc.

13.1 IGNITER

1. Disconnect the two feed wires, earth wire and electrode lead noting their positions (Fig. 53).

2. Undo the two screws securing the igniter to its bracket and remove the igniter. Reassemble in reverse order.

13.2 SPARK AND SENSING ELECTRODES

1. Disconnect the electrode leads, noting their positions (Fig. 56).

2. Using a 3mm Hex key, remove the retaining screws securing each of the electrodes to the burner door and remove the electrodes.

3. Check the condition of the sealing gaskets and replace if necessary. Reassemble in reverse order and then check that the electrode gaps are as shown in Fig. 54 & 55.

Fig. 53

Fig. 54

Fig. 55

Fig. 56

Igniter

Gasket

6mm ± 0.5

to Burner

4mm ± 0.5

10mm ± 0.5

7.0 SITE REQUIREMENTS

7.7 FLUE

1. This high efficiency boiler will discharge a plume of water vapour from the flue. This should be considered when siting the flue terminal.

2. The following guidelines indicate the general requirements for siting balanced flue terminals. For GB recommendations are given in BS 5440 Pt 1. For IE recommendations are given in the current edition of I.S. 813 “Domestic Gas Installations”.

3. If the terminal discharges onto a pathway or passageway, check that combustion products will not cause a nuisance and that the terminal will not obstruct the passageway.

4. If a terminal is less than 2 metres above a balcony,above ground or above a flat roof to which people have access, then a suitable terminal guard must be provided - Part No: 951507.

IMPORTANT:

• Only O

ONE

of the 25mm clearances (Positions ‘O’ to ‘S’ in

the chart below) is allowable per installation.

• Under car ports we recommend the use of the plume displacement kit.

• The terminal position must ensure the safe and nuisance

- free dispersal of combustion products.

NOTE: The minimum distance from a flue terminal to a boundary line is 300mm.

If fitting a plume diverter kit, the air inlet should be a minimum of 100mm from

any opening windows or doors.

NOTE A: A terminal should be no closer than 150mm to an opening in the brickwork intended to accommodate a fitting such as a window frame.

NOTE: Fitting of the deflector elbow is recommended when installing boiler to minimum clearance of 25mm as detailed in positions O & P.

M,L

Flue terminals that require a guard fitting

Position Description Minimum Distance (mm)

A Horizontally to an opening, air brick, opening window - see note A 300 B Above an opening, air brick, opening window etc. - see note A 300 C Below an opening, air brick, opening window etc. - see note A 300 D Below windows or openings on pitched roofs 2000 E Adjacent to windows or openings on pitched and flat roofs 600 F From an adjacent opening window (vertical only) 1000 G From an adjacent wall to flue (vertical only) 300 H Horizontally from a terminal on the same wall 300 J Vertically from a terminal on the same wall 1500 K From an opening in a carport (e.g. door, window) into the dwelling 1200 L From a terminal facing a terminal (horizontal flue) 1200

From a terminal facing a terminal (vertical flue) 600 M From a surface or boundary line facing a terminal 600 N Above ground, roof or balcony level 300 O From an internal or external corner 25 P From a vertical drain pipe or soil pipe 25 Q Below balconies or car port roof 25 R Below eaves 25 S Below gutters, soil pipes or drain pipes 25

300mm Min 300mm Min

Adjoining Properties Boundary Line

TERMINAL POSITION

Fig. 18

Fig. 19

48pp MANUAL SPREADS 19/10/10 08:36 Page 17

8.0 FLUE OPTIONS

8.1 CONCENTRIC AIR/FLUE DUCT SPECIFICATIONS

The Dimplex Combi 24, Dimplex Combi 30 and Dimplex Combi 38 can be installed to a number of different concentric flue systems. The different flue applications as shown in Fig. 20 are available as kits comprising the connecting parts to the appliance and end terminal. Flue extension ducts and extension elbows are available as accessories.

Note:

Dimplex Combi 38 only, with maximum concentric

flue length of 10m, the heat input will be reduced by 6.1%

8.2 Kit A + Telescopic Horizontal Wall Terminal (C13) - Part No. 956120

Traditional concentric flue system, Fig. 21, with a maximum length of 10000mm. The flanged flue elbow is designed with a 3° slope towards the appliance so that the condensate can easily drain off. It has to be considered that for every metre horizontal flue length the terminal exit centreline is approx. 45 mm higher than the elbow’s centreline. The standard telescopic terminal is 615mm max length and 430mm min length, but can be cut to a minimum flue length of 250mm, which is suitable for single, 100mm (4”), brick walls.

8.3 Kit B Vertical Concentric Flue Terminal (C33) - HBL Part 956081

Standard concentric (100/60) vertical flue application, Fig. 22, through roof attics with a maximum length of 12000mm. The kit comprises of the roof terminal, flashing kit, vertical adaptor with sampling point and bracket. The maximum length is measured from the top of the appliance casing to the underside of the air cowl. For installation details refer to the flue kit instructions.

Chimney flue liner kit

- Part no. 956082

Vertical flue kit - Part no. 956081

with flat roof flashing plate

Split pipe vertical flue outlet kit

- Part no. 956080

with flat roof flashing plate

Raised external flue outlet kit

- Part no. 956084

Vertical flue kit - Part no. 956081

External vertical flue kit

- Part no. 956085

Standard telescopic

horizontal flue kit

- Part no. 956120

Flue system application

The pluming from the flue may cause nuisance to neighbours or other buildings.

60/100 flue accessories:

0.5m flue extension duct - 956092 1m flue extension duct - 956093 93 flue extension elbow - 956091 45 flue extension elbow (2x) - 956090 Vertical flue turret - 956087

Ø60/100mm concentric standard horizontal wall terminal. Max. length 10,000mm. Min. length 250mm.

Standard telescopic horizontal flue kit - Part no. 956120

Horizontal terminal has a built-in fall in the flue to allow condensate to drain away.

If horizontal flue requires extension pipe. the flue should be installed such that there is no section less than

2.5° - 3° to the horizontal, falling back towards the boiler.

93 flanged elbow (concentric) with sampling point

Kit A +

Vertical flue kit - Part no. 956081

Suitable for 25 - 45°

Pitch Angle

Length

Kit B

60/100 flue accessories:

0.5m flue extension duct - 956092 1m flue extension duct - 956093 93 flue extension elbow - 956091 45 flue extension elbow (2x) - 956090 Flat roof flashing plate - 840512 93 flanged flue elbow - 956086 Max. length12m. Min. length 0.6m.

Roof terminal with rain cover and pitched roof flashing kit.

Vertical flue socket with sampling point.

Top of Boiler

to underside of Cowl

Fig. 20

Fig. 21

Fig. 22

12.0 SERVICING AND MAINTENANCE

12.1 ANNUAL SERVICING

8. Remove the two screws securing the front panel to the underside of the boiler. Lift the panel upwards off its retaining studs on top of the appliance.

9. Disconnect the two leads to the fan and one lead to the gas valve.

10. Undo the nut on the gas inlet pipe to the valve and retain the sealing washer.

11. Remove the four nuts holding the burner door plate and remove the valve and fan assembly (Fig. 51).

12. Clean any debris from the heat exchanger using a soft brush and check that the gaps between the tubes are clear.

13. Inspect the burner, electrode positions and insulation, cleaning or replacing if necessary.

14. Check the condition of the burner door seals, replacing if necessary.

15. Reassemble in reverse order.

16. Complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication and then hand it back to the user.

Fig. 51

Fig. 49

Fig. 50

Fig. 52

Gas Inlet Nut

Front Panel

Retaining Stud

X 4

X 2

Burner Door Seal

Inner Seal

48pp MANUAL SPREADS 19/10/10 08:36 Page 18

12.0 SERVICING AND MAINTENANCE

12.2 COMBUSTION CHECKS

COMBUSTION CHECKS AT MAXIMUM RATE

9. Set the boiler to Maximum gas rate.

10. Check the Carbon Monoxide (CO) and Carbon Dioxide (CO2) readings are within the range quoted in the tables opposite (Table 2).

11. If the combustion value(s) is outside the values specified in Tables 1 and 2 and the integrity of the full flue system and combustion circuit seals, the inlet gas pressure and gas rate have been verified, it is possible to make an adjustment to the combustion settings by adjustment of the air/gas ratio valve. See Section 12.3 Adjustment of the Gas Valve.

12.3 ADJUSTMENT OF THE GAS/AIR RATIO VALVE

COMBUSTION SETTING ADJUSTMENT

1. It is only possible to adjust the valve at Maximum rate. No adjustment at Minimum rate is allowed.

2. If the maximum rate setting is adjusted, then the combustion values must be checked at minimum rate.

NOTE:

DO NOT ATTEMPT TO ADJUST THE GAS/AIR RATIO

VALVE UNLESS;

• The person carrying out the measurement has been assessed as competent in the use of a flue gas analyser and the interpretation of the results.

• The flue gas analyser used, meets the requirements of BS7927 or BS-EN50379-3.

• The flue gas analyser is calibrated in accordance with the manufacturers requirements.

3. At Maximum Gas Rate; put the appliance into Service Mode at Maximum Gas Rate (see Section 11.2).

4. Wait 5 minutes to allow the boiler to stabilise.

5. If the Carbon Dioxide (CO2) level is outside the required values given in Section 12.2 (Table 2) then adjust the throttle screw (Fig. 48) until the CO2is at the correct setting level. See Table 4. Clockwise to decrease CO2, anti-clockwise to increase CO2.

NOTE:

Only turn the throttle in small steps of n

no more than

1/8

of a turn

and wait 1 minute after each adjustment for

the combustion reading to stabilise.

IMPORTANT:

After any adjustment of the gas valve, it is essential to check the combustion levels at minimum gas rate (Table 1). If the Carbon Monoxide or Carbon Dioxide levels are outside the range quoted, call Dimplex Boilers Ltd Technical Helpline on 0844 3711121. If in doubt ASK!

Table 4

Fig. 48

NOTE:

Factory set - warranty

void if adjusted

Throttle Adjuster Screw

Gas Valve

Inlet Test Point

Carbon Dioxide (CO2) acceptable setting level at Maximum

Gas Rate after 5 minutes operation

Natural Ga

s %Boiler Model

Combi 24

9.0 10.7

Combi 30

9.3 10.9

Combi 38

9.1 10.7

LPG (Propane) %

8.0 FLUE OPTIONS

8.5 Kit C Horizontal Anti-Plume Flue Kit (C13) - Part No. 956084

If the standard horizontal terminal is likely to cause nuisance to a neighbour or buildings, because of excess pluming, then this particular flue kit raises the flue gas outlet point to a higher elevation with the minimum amount of changes. The flue gas duct is teed-off from the concentric part and covered by an 80mm outer tube to protect the flue duct from freezing. The air in-take remains at the lower level (see Fig. 24). If choosing this option then the external flue duct length should be taken into account when calculating equivalent flue length. For installation details refer to the flue kit instructions. Dimensions from vertical terminals to opening windows should be in line with Fig. 19.

(For use with Standard horizontal telescopic flue kit - Part no. 956120 - only).

This kit is provided to assist in fitting a condensing boiler with reduced clearances when fitted in good practice according to the Guide to Condensing Boiler Installation published by DEFRA/HMSO.

This kit allows the boiler flue outlet to be directed to the left or to the right only.

Suitable for installations if the appliance cannot be repositioned and where other horizontal flue options may cause some nuisance to neighbours or buildings. The flue kit contains some additional 45° elbows and extension ducts as well as a special wall bracket to pass the guttering (see Fig. 26). The concentric flue will be routed vertically alongside the outside wall to above the roofline. Special seals are required to prevent rainwater penetrating the pipe joints. For installation details refer to the flue kit instructions.

8.6 Plume Diverter Terminal Kit Part No. 956103

8.7 Kit D External Vertical Flue (C33) - Part no. 956085

93 flanged elbow (concentric) with sampling point

Raised external flue outlet kit Part no. 956084

Kit C

Raised Ø60mm flue outlet duct with Ø80mm anti-freeze pipe. Max height of raised flue from top of boiler to centre of outlet 8.5m Min height 1m.

Standard horizontal flue adaptor has an already built-in fall in the flue to allow the condensate to drain away.

93 flanged elbow (concentric) with sampling point

Max. lengths (from top of boiler to AIR COWL 8m Min. length 1m.

Kit D

Ø60/100mm concentric air/flue pipe Part no. 956093 (1m extension) and Part no, 956092 (0.5m extension)

For outside installations the pipe joints have to be covered with special “lip-seal” to prevent rain ingress.

Ensure all horizontally fitted pipes are routed with a

2.5-3° fall towards the boiler.

External vertical flue kit - Part no. 956085

Roof terminal with rain cover.

Roof terminal with rain cover and pitched roof flashing kit.

8.4 Offset Vertical Flue Terminal (C33) - HBL Part 956081

‘a’ measured from boiler flue outlet centre line to the centre line of the extension elbow. ‘b’ measured from the top of the boiler to the underside of the air cowl. Maximum allowable length of a + b = 8900mm

Fig. 23

Fig. 24

Fig. 25

Fig. 26

48pp MANUAL SPREADS 19/10/10 08:36 Page 19

8.0 FLUE OPTIONS

8.8 Kit E Chimney Flue Liner Kit

(B23) - Part no. 956082

Note:

Dimplex Combi 38 - Maximum flue length 21m, and 30m for all other appliances.

This kit is suitable for open flue application in accordance with BS5440 where a room sealed flue installation is impractical. The kit comprises of a flue adaptor from the appliance to the chimney, a flexible plastic flue liner with connection parts and chimney terminal (see Fig. 27). Where an open flue system is used, then an air vent must be provided in the same room or internal space as the flue duct air inlet, see section 7.3. For installation details refer to the flue kit instructions. Maximum flue resistive length = 30m.

A flue system can be built up from the components detailed in table 8.10, but the total flue resistance must not exceed the maximum stated.

8.9 Kit F: Twin Flue System

(C53) - Part no. 956080

Note:

Dimplex Combi 38 - Maximum flue length 21m, and 30m for all other appliances.

This flue system kit is designed for installations where the air intake position is different than the flue duct exit point. The kit comprises of a twin adaptor from which the air intake is taken from the adjacent outside wall (see Fig. 28) and the flue duct is routed vertically through the roof. It has to be noted that the flue duct is under pressure when the appliance is in operation and the duct can leak poisonous carbon monoxide if the duct components are not correctly assembled. It is n

not

recommended to route the flue duct through living space areas, i.e. bedrooms, living rooms etc. For installation details refer to the instructions provided with the twin flued kit. For C53 flue systems the terminal for the supply of combustion air and for the evacuation of combustion products shall not be installed on opposite walls of the building.

Maximum flue resistance permitted for a twin flued system = 52 Pa

Minimum flue resistance permitted for a twin flued system = 23.5 Pa

Centralising brackets

Chimney terminal

93 flanged elbow (concentric) with sampling point

Ø60/100mm concentric chimney adaptor pipe.

In replacement installations, the chimney has to be cleared of debris and all flue parts.

Chimney plate

Flexible corrugated plastic flue liner Ø80mm according to EN 14471 Max. length 30m. Min. length 5m.

KIT E

Chimney flue liner kit - Part no. 956082

Flue Component Flue Resistance (Pa) Part Number

Twin Flue Adaptor (required) 9.5 Air Inlet Terminal (required) 3 Chimney Terminal (required) 0.5 80 mm dia straight duct 1 metre 1 956101 80 mm dia straight duct 2 metre 2 956102 90° Elbow (80/80) 8 956100 45° Elbow (80/80) 4 956099

A flue system can be built up from the components detailed in the table, but the total flue resistance must not exceed the maximum stated.

Ø80mm air intake

Split flue system

Roof terminal with pitched roof flashing kit.

If the flue pipe passes through compartment from wall/floors, the requirements set out in Building Regulations Part B must be followe

Ø80mm twin adaptor with sampling point.

If the flue pipe passes through habitable rooms within the same dwelling, the flue pipe must be routed through vented ducts.

The flue resistance for the following accessories has to be considered. Ø80mm flue extension 90 elbow 45 elbow

Split pipe vertical flue outlet kit Part no. 956080

Kit F

Fig. 27

Fig. 28

12.0 SERVICING AND MAINTENANCE

12.1 ROUTINE SERVICING AND ALL MAINTENANCE THAT INVOLVES THE EXCHANGE OF PART OF THE COMBUSTION CIRCUIT

1. During routine servicing, e.g. an annual service check, and after all maintenance that involves the exchange of parts of the combustion circuit, we recommend that (in this order) the integrity of the full flue system and combustion circuit seals, the inlet gas pressure, gas rate and combustion performance is verified.

NOTE:

The combustion circuit on this appliance comprises of the PCB, fan, air/gas ratio valve, burner, burner door, combustion box door, injector and flue system.

2. To ensure continued safe and efficient operation of the appliance it is recommended that the boiler is serviced at least annually. Servicing must be performed by a competent person. BS 7967-1 gives guidance on identifying and managing sources of fumes, smells, spillage/leakage of combustion products and carbon monoxide detector activation.

Safety Checks

On any service visit always check;

a. Condition of flue system, both air and combustion products ducts. b. Condition of seals and joints. c. For evidence of leakage of combustion products. d. For evidence of heat staining. e. For operation at maximum heat input. f. The general condition of the boiler and its components.

1. Combustion checks must be carried out with the outercase fitted.

2. Remove the sampling cap from the boiler flue elbow or boiler vertical flue adaptor.

3. Insert the probe from the portable electronic combustion analyser into the sampling point.

4. With the appliance operational, connect the flue gas analyser to the flue sampling point as shown in Fig. 47.

NOTE:

The outercase must be fitted for all combustion checks.

5. With the boiler at minimum rate and then at maximum rate (allowing the combustion to stabilise at each rate before taking a reading) carry out the combustion checks as follows:

COMBUSTION CHECKS AT MINIMUM RATE

6. The combustion values at minimum gas rate and maximum gas rate must be checked using a suitable calibrated flue gas analyser. Further guidance is detailed in BS7967 parts 1 to 4.

7. Set the boiler into Service Mode at Min Rate (see section 11.1).

8. Check the Carbon Monoxide (CO) and Carbon Dioxide (CO

) readings are within the range quoted in the tables opposite (Table 1).

12.2 COMBUSTION CHECKS

C o m

f or t +

2 2

2 3

2 4

b a r

Fig. 47

Flue Gas Sampling Point

Minimum Gas Rate

Boiler Model

(kW)

Carbon

Monoxide

p.p.m

0 - 40

0 - 30

Carbon Dioxide

CO2%

8.2 - 8.6

8.7 - 9.1

8.3 - 8.7

LPG

Carbon

Monoxide

p.p.m

0 - 40

Carbon

Dioxide

CO2%

10.2 - 10.6

10.4 - 10.8

Maximum Gas Rate

Boiler Model

(kW)

Carbon

Monoxide

p.p.m

40 - 120

Carbon Dioxide

CO2%

8.8 - 9.2

9.1 - 9.5

8.9 - 9.3

LPG

Carbon

Monoxide

p.p.m

80 - 160

100 - 180

70 - 150

Carbon

Dioxide

CO2%

10.5 - 10.9

10.7 - 11.1

10.5 - 10.9

Table 1

Table 2

48pp MANUAL SPREADS 19/10/10 08:36 Page 20

11.0 SERVICE MODE

NOTE:

Service Mode automatically stops after 10 minutes

and the boiler returns to normal operation.

NOTE:

On Dimplex Combi 24, 30 and 38kW boilers, the maximum gas rate is only available when the boiler is in hot water mode. Open two or more hot water taps and ensure that the flow rate is not less than quoted in Table 3.

1. Turn the CH knob fully clockwise - Note the knob will turn past the maximum temperature mark (Fig. 45).

2. The CH and DHW lights will flash continuously - the boiler is now running at minimum rate.

1. To exit Service Mode, turn the CH knob anti-clockwise to the temperature previously set by the customer. The CH and DHW lights will now stop flashing.

1. Set the boiler into Service Mode at Minimum Rate.

2. Whilst in Service Mode at Min Rate, turn the CH knob to 12 ‘O’ clock position and then back to fully clockwise (past the maximum temperature indicator) within 3 seconds. The boiler will now run at maximum gas rate for 10 minutes.

11.1 TO SET THE BOILER AT MINIMUM GAS RATE

11.2 TO SET THE BOILER AT MAXIMUM GAS RATE

11.3 TO SET THE BOILER AT MAXIMUM GAS RATE IN CENTRAL HEATING

Fig. 45 Fig. 46

Comfort +

2 4

bar

Flow rate (litres/minute)Boiler Model

Combi 24kW

9.8

Combi 30kW

12.3

Combi 38kW

15.6

Table 3

8.0 FLUE OPTIONS

8.10 FLUE LENGTHS

Length supplied in standard kit - horizontal 815mm Max horizontal length (from boiler to chimney - 60/100mm) 2000mm Min horizontal length (from boiler to chimney - 60/100mm) 100mm Max vertical length (from boiler to chimney - 60/100mm) 2000mm Min vertical length (from boiler to chimney - 60/100mm) 200mm Length supplied in standard kit - vertical (available in 10m, 20m an 30m length) N/A

Flexitube must be purchased as an accessory to complete the kit (see below)

Flexitube min length 5m Flexitube max length 30m

Accessories

Description Part No. Equivalent Length Horizontal - 60/100 Accessories Flue extension duct - 500mm 956092 450mm Flue extension duct - 1000mm (incl. 1 x support bracket) 956093 950mm 93° extension elbow 956091 1550mm 45° extension elbow (pair) 956090 775mm Air inlet duct - included in kit N/A N/A Straight adaptor (60/80) - included in kit N/A N/A

91.5° adaptor elbow (80/80) - included in kit N/A N/A Support bracket - 100mm 840517 N/A 93° flanged elbow - included in kit 956082 N/A Vertical turret socket 956087 N/A

Vertical - Accessories

Flexi tube - 10m 956110 10m Flexi tube - 20m 956111 20m Flexi tube - 30m 956112 30m Straight duct (80) - included in kit N/A N/A Chimney terminal - included in kit N/A N/A

Note: Equivalent length information only required for coaxial flue parts. The corrugated (Flexi tube) flue parts are fixed and all parts are required for every application.

8.11 Additional Concentric Flue Kit Accessories

The following additional concentric kit accessories are available as optional extras.

Flue Extension Ducts - 1000 mm (956093) and 500 mm (956092), (each duct extends the flue length by up to 950 mm and 450 mm respectively). 93° Extension Elbow (956091) - Allows an additional bend in the flue, and has an ‘equivalent length’ of 1550 mm. This elbow is mechanically different from the flanged elbow supplied as standard with the appliance, but has the same equivalent length. 45° Extension Elbow (956090) - Allows an additional bend in the flue and has an ‘equivalent length’ of 775 mm. Vertical Turret Socket (956087) - For use with elevated horizontal flues and vertical terminals. Vertical Roof Terminal - For use where an external wall is not available, or where it is desirable to route the ducts vertically.

For installation details refer to the instructions provided with the individual flue kits.

These optional kits may be used with the standard flue kits to produce an extensive range of flue options, providing that the following rules are strictly obeyed.

a) The maximum/minimum permissible length of the room sealed flue system are: Horizontal flue terminal (all orientations) maximum 10000 mm

Horizontal flue terminal (rear exit) minimum 250 mm

Vertical flue terminal maximum 12000 mm

Vertical flue terminal minimum 600 mm

The ‘equivalent’ flue length must not exceed the maximum values stated.

b) The standard terminal must be fitted horizontally; horizontal ducts must have a continuous fall towards the appliance of

1.5° to 3°. This ensures condensate runs back into the appliance from the flue system. The vertical terminal must always be used if a vertical outlet is required.

c) The concentric flue system must use either a flanged elbow or a vertical flue turret socket at the entry/exit to the appliance.

d) All joints must be correctly made and secured in accordance with the installation instructions. When cutting ducts, avoid swarf, uneven and sharp edges to maintain duct integrity.

Refer to Fig. 19 & 20 to determine which option kits are required before commencing the installation. Instructions for installing the appliance with a horizontal flue and straight extension ducts are included in the main text of these instructions (section 9.5).

48pp MANUAL SPREADS 19/10/10 08:36 Page 21

9.0 INSTALLATION

9.1 UNPACKING & INITIAL PREPARATION

The gas supply, gas type and pressure must be checked for suitabilit

y before connection

1. Remove the top cardboard tray from the carton.

2. The wall fixing jig is packed in its own cardboard sleeve. Carefully slide this out of the carton.

3. To avoid scratching the boiler outercase, keep the outer carton in place.

4. After reviewing the site requirements (see Section 7.0), position the fixing template on the wall ensuring it is level both horizontally and vertically.

5. Mark the position of the fixing holes for the wall plate and boiler lower fixing holes.

6. Mark the position of the centre of the flue hole (rear exit). For side flue exit, mark as shown (Fig. 4).

7. If required, mark the position of the gas and water pipes. Remove the template.

8. Cut the hole for the flue (minimum diameter 110mm).

9. Drill the wall as previously marked to accept the wall plugs supplied. Secure the wall fixing jig using the fixing screws.

10. Using a spirit level ensure that the fixing jig is level before finally tightening the screws.

11. Flush and clean the system using an appropriate cleanser (Fig. 30).

12. Connect the gas and water pipes to the valves on the wall fixing jig.

13. Fit the filling loop as described in the instructions supplied with it.

Fig. 30

Flushing Pipe

Central Heating Flow

or Return Pipe

Fig. 29

10.0 COMMISSIONING

10.2 FACTORY SETTINGS

1. With the boiler firing at maximum gas rate, check that the inlet pressure at the appliance is 19mbar +/- 1mbar when measured at the inlet pressure test point (Fig. 44). To set the boiler to maximum gas rate see section

11.0 (Service Mode).

2. Check the maximum and minimum gas rate at the gas meter according to the table below using a stopwatch.

NOTE:

This boiler is supplied factory set for operation on natural gas. No further adjustments of the air/gas ratio valve or measurement of the combustion performance are necessary at the time of installation and commissioning. This is provided the appliance has been installed according to these instructions and the inlet gas pressure is within our specification.

NOTE:

If any doubts exist over the above checks then the combustion of the appliance can be measured as described in Section 12.0 of these instructions providing;

• The person carrying out the measurement has been

assessed as competent in the use of a flue gas analyser and the interpretation of the results.

• The flue gas analyser used, meets the requirements of

BS7927 or BS-EN50379-3.

• The flue gas analyser is calibrated in accordance with the

manufacturers requirements.

10.3 INLET PRESSURE AND GAS RATE CHECKS

1. On completion of the gas inlet pressure and gas rate checks, it is necessary to check the following:

• The appliance installation conforms to these instructions.

• The installation and integrity of the full flue system including the seals in the flue pipes.

• The boiler combustion circuit, including the burner door seal, combustion door seal.

2. The recorded combustion values should be compared with

the values in Table 1 and Table 2 (see Section 12.2).

3. If the combustion value(s) is outside the values specified in

Section 12.2 (Tables 1 & 2), do not attempt to adjust the air/gas ratio valve, please ring the helpline number -

0844 371 1121. If in doubt - ASK.

10.4 COMBUSTION CHECKS DURING COMMISSIONING

Gas Rates (Natural Gas) after 5 minutes from cold

Maximum RateBoiler Model

m3/h ft3/h m3/h ft3/h

Combi 24

2.6 91.8 0.59 20.8

Combi 30

3.31 116.9 0.73 25.7

Combi 38

4.1 144.7 0.97 34.2

Minimum Rate

Fig. 44

NOTE:

Factory set - warranty

void if adjusted

Throttle Adjuster Screw

Gas Valve

Inlet Test Point

48pp MANUAL SPREADS 19/10/10 08:36 Page 22

10.0 COMMISSIONING

10.1 COMMISSIONING THE BOILER

IMPORTANT: The air vent on top of the boiler must be OPEN when filling the

system. Attach a tube to the air vent

to safely collect any excess water (Fig. 38).

Gas Soundness

1. Ensure the gas service cock on the boiler is turned on (Fig. 40). The entire gas installation must be tested for gas tightness and purged in accordance with BS6891.

2. Open the service cocks to the mains cold water, CH flow and CH return supplies.

3. Purge the DHW system by opening a hot tap.

4. Connect the filling loop and fill and vent the CH system.

NOTE:

Ensure the boiler is completely vented using the

manual air vent on top of the boiler.

5. Drain, flush and refill the boiler and system in accordance with BS7593 (Fig. 30).

NOTE:

Failure to flush the system and to add inhibitor will

invalidate the appliance warranty.

6. Pressurise the system to 1.5 bar (Fig. 42).

Electrical Safety Checks on the Controls System and Boiler

7. Carry out earth continuity, resistance to earth, short circuit and polarity checks using a suitable meter.

8. Switch on the electricity supply to the boiler.

9. Set the DHW temperature control to Max. (Fig. 43) and open a DHW tap. The display will initially show the target temperature and then revert back to show the primary water temperature within the boiler.

10. Set the controls to call for heat. The boiler will now operate in CH mode. Check the CH system for correct operation.

11. Replace the outer door and two securing screws.

bar

Comfort +

Air Vent

Tub e

Fig. 39

Fig. 38

Fig. 40

Fig. 41

Fig. 42 Fig. 43

CH Return

CH Flow

Mains Cold Water Inlet

Gas Inlet

DHW Outlet

Boiler Drain Point

Comfort +

2 4

bar

9.0 INSTALLATION

9.2 FITTING THE BOILER

1. Remove the sealing caps from the boiler connections.

NOTE: A small amount of water may drain from the boiler once the caps are removed.

2. Check the sealing washers are located correctly in the taps

on the wall jig.

3. Lift the boiler as indicated by the shaded areas. The boiler

should be lifted by TWO PEOPLE. Engage the slots at the top rear of the boiler on the wall plate (Fig. 31) (see S

Safe Manual

Handling

page 6).

4. Ensure the boiler is correctly located on the wall jig and the

connections align. Tighten all the connections.

NOTE: Take care with the Flow Turbine connection as it has a plastic body.

9.3 FITTING THE PRESSURE RELIEF DISCHARGE PIPE

1. Remove the two screws securing the front panel to the

underside of the boiler. Rotate the bottom of the panel out slightly and lift the panel upwards off its retaining studs on top of the appliance.

2. Determine the route of the discharge pipe.

3. Taking care not to disturb the case sealing grommet, the

pipework must be at least 15mm diameter and run continuously downwards to a discharge point outside the building.

4. Complete the discharge pipework and route it to the outside

discharge point.

9.4 CONDENSATE DRAIN

1. Connect the condensate drain to the trap outlet pipe.

Ensure the discharge of condensate complies with any national or local regulations in force (see British Gas “Guidance Notes for the Installation of Domestic Gas Condensing Boilers”).

2. The connection will accept 21.5 - 22mm plastic overflow

pipe which should generally discharge internally into the household drainage system. If this is not possible, discharge into an outside drain is acceptable.

Fig. 33

Pressure Relief Discharge Pipe

Front Panel Retaining Stud

X 2

Fig. 31

Fig. 32

48pp MANUAL SPREADS 19/10/10 08:36 Page 23

9.0 INSTALLATION

9.5 FITTING THE FLUE

HORIZONTAL TELESCOPIC FLUE

1. For correct flue installation please refer to the installation instructions that are provided with the individual flue kit as described in sections 7 & 8.

2. Measure the required flue length as shown in Fig. 34. Refer to section 8 to determine whether any extension kits are required. Installations using only the standard ducts or standard ducts with straight extensions are described in this section. Installation instructions for all other flue systems are included in the various flue kits.

3. Ensure that all (inner and outer tube) sealing rings are provided and assemble the air/flue ducts as shown in the flue instructions.

4. Ensure that the flue and air seals are correctly fitted before assembly and that each section is fully engaged.

NOTE: NEVER CUT THE SWAGED END. Where necessary the plain ends of the extension ducts may be cut. Always ensure that the cut is square and free of burrs or debris. It is essential that the terminal is fitted the correct way up. See flue kit instructions (i.e. rain shield at the top).

INSTALLING THE AIR/FLUE DUCT FROM INSIDE THE ROOM

Detailed installation instructions are included in the flue kit. (Flue hole diameter 130mm).

1. Push the terminal through the wall taking care to ensure that the terminal is the correct way round and the external wall-sealing ring does not become dislodged.

2. Assemble the flue system extension ducts as necessary, referring to Fig. 35.

3. Pull the flue system towards the appliance to seat the external sealing ring against the outside wall, ensuring that the duct joints are not disturbed.

4. Use the internal sealing ring to make good the internal hole and check that the terminal is correctly located on the outside wall. Where possible this should be visually checked from outside the building (Fig. 35).

5. Finally locate and secure the elbow to the appliance using the four screws provided.

INSTALLING THE AIR/FLUE DUCT FROM OUTSIDE THE BUILDING

Detailed installation instructions are included in the flue kit. Flue hole diameter 100mm - 110mm.

1. Secure the flue elbow with seal to the appliance using 4 screws.

2. Fit the external wall sealing ring over the flue and then from outside the building, push the flue system through the wall taking care to ensure that the terminal is the correct way around.

3. Loosely fit the internal wall sealing ring over the inside end of the flue.

4. Assemble the flue system extension ducts as necessary referring to the flue kit instructions and fit to the elbow.

5. Fit the flue terminal to the flue system, ensuring that the duct joints are not disturbed and that the external sealing ring is seated against the outside wall.

6. Finally use the internal sealing ring to make good the internal hole. Check that the external wall sealing ring and the terminal is correctly located on the outside wall.

Fig. 34

Fig. 35

‘L’ = Total flue length from flue outlet

centre to outside wall face

Fibre Seal

Fitted

Align the assembled flue system elbow to appliance and secure

Slide internal wall

sealing ring to wall to

form a good seal

Insert assembled flue

system from inside the

room. External wall

sealing ring opens

External Wall Sealing Ring

Terminal

Top

Internal Wall

Sealing Ring

9.0 INSTALLATION

9.6 MAKING THE ELECTRICAL CONNECTIONS

The boiler is fitted with a 1.5m length of 3 core cable. This can be connected to the fused 3A 230V 50Hz supply.

To connect an external control proceed as follows:-

1. Lower the drop down door.

2. Remove the two screws holding the controls box and ease the box away from the boiler. The electrical connections are made at the left hand side on the rear of this box.

3. Slacken the cable clamp on the terminal block (Fig. 36). Insert the external control wiring through the clamp and route it to the terminal block. Tighten the cable clamp.

4. Refer to the instructions supplied with the control.

IMPORTANT:

The room thermostat M

MUST

be suitable for

230V switching.

Ensure that the external control input cable (s) have sufficient slack to allow the control box to drop down.

5. Route external control cables away through the mains cable grommet supplied.

9.7 PRELIMINARY ELECTRICAL CHECKS

1. Prior to commissioning the boiler preliminary electrical system checks should be carried out.

2. These should be performed using a suitable meter, and include checks for Earth Continuity, Resistance to Earth, Short Circuit and Polarity.

L1 brown

L2 red

green/yellow

green/yellow (earth)

Fused supply 3A 230V~50Hz

brown (live)

red linkwire230V - Switch Live

230V - To external control

Permanent live

blue (neutral)

N blue

L3 orange

Connect external control using L2 & L3

Disconnect link wire

To boiler

Fig. 37

Fig. 36

48pp MANUAL SPREADS 19/10/10 08:36 Page 24

Glen Dimplex Combi 24, Combi 30, Combi 38 Installation And Servicing Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual