Glow-worm 80CFF User Manual

Instructions for Use
Installation and Servicing
To be left with the user
Hideaway
80C FF
G.C. No. 41-047-41
9919
Chimney
Fanned Flue Boiler
This is a Cat I2H Appliance
Reference in these instructions to British Standards and Statutory
Regulations/Requirements apply only to the United Kingdom.
The instructions consist of three parts, User, Installation and Servicing Instructions, which includes the Guarantee Registration
For Ireland the rules in force must be used.
Card. The instructions are an integral part of the appliance and must, to comply with the current issue of the Gas Safety
(Installation and Use) Regulations, be handed to the user on completion of the installation.
Guarantee Registration
Thank you for installing a new Glow-worm appliance in your home.
Glow-worm appliances' are manufactured to the very highest standard so we are pleased
to offer our customers' a Comprehensive First Year Guarantee.
In the centre pages are to be found your Guarantee Registration Card, which we recommend you complete and
return as soon as possible.
If this card is missing you can obtain a copy or record your registration by telephoning the Heatcall Customer
Service number 01773 828100.
Our Guarantee gives you peace of mind plus valuable protection against breakdown by covering the cost of:
All replacement parts
All labour charges
All call-out charges
One Contact Local Service
REGISTER YOUR GLOW-WORM APPLIANCE
FOR 1ST YEAR GUARANTEE PROTECTION
CALL 0208 247 9857
Customer Services:
Tel: (01773) 828100
Fax: (01773) 828070
Nottingham Road, Belper, Derbyshire. DE56 1JT
Tel: (01773) 824141 Fax: (01773) 820569
Hepworth Heating Ltd.,
General/Sales enquiries:
Important Information
TESTING AND CERTIFICATION
This boiler is tested and certificated for safety and performance. It is therefore important that no alteration is made to the boiler, without permission, in writing, from Hepworth Heating Ltd.
Any alteration not approved by Hepworth Heating Ltd., could invalidate the certification, boiler warranty and may also infringe the current issue of the Statutory Requirements, see Section 1.3.
CE MARK
This boiler meets the requirements of Statutory Instrument No. 3083 The boiler (Efficiency) Regulations, and therefore is deemed to meet the requirements of Directive 92/42/EEC on the efficiency requirements for new hot water boilers fired with liquid or gaseous fuels.
Type test for purposes of Regulation 5 certified by: Notified body 0086.
Product/production certified by: Notified body 0086.
The CE mark on this appliance shows compliance with:
1. Directive 90/396/EEC on the approximation of the laws of the Member States relating to appliances burning gaseous fuels.
2. Directive 73/23/EEC on the harmonization of the Laws of the Member States relating to the electrical equipment designed for use within certain voltage limits.
3. Directive 89/336/EEC on the approximation of the Laws of the Member States relating to electromagnetic compatibility.
INFORMATION FOR THE INSTALLER AND SERVICE ENGINEER.
Under Section 6 of The Health and Safety at Work Act 1974, we are required to provide information on substances hazardous to health.
Ceramic Fibre/Insulation Pads, GlassYarn.
These can cause irritation to skin, eyes and the respiratory tract. If you have a history of skin complaint you may be susceptible to irritation. High dust levels are usual only if the material is broken. Normal handling should not cause discomfort, but follow normal good hygiene and wash your hands before eating, drinking or going to the lavatory. If you do suffer irritation of the eyes or severe irritation to the skin seek medical attention.
SPARE PARTS
REMEMBER, when replacing a part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hepworth Heating Ltd.
MANUAL HANDLING GUIDANCE
During the appliance installation and the replacement of the heat exchanger it will be necessary to employ caution and assistance whilst lifting as the appliance or component exceeds the recommended weight for a one man lift.
In certain situations it may be required to use a mechanical handling aid.
Take care to avoid trip hazards, slippery or wet surfaces.
CONTENTS DESCRIPTION SECTION PAGE No.
INSTRUCTIONS
FOR USE
INSTALLATION
INSTRUCTIONS
Introduction 3 Lighting the Boiler 4
General Data 1 5 Water Systems 2 8 Flue & Ventilation 3 9 Installation 4 10 Electrical Wiring 5 17 Commissioning 6 18 Instructions to User 7 20
SERVICING
INSTRUCTIONS
2000225006B
Servicing 8 20 Fault Finding 9 23 Replacement Parts 10 26 Spare Parts 11 28
2
Instructions for Use
Introduction
Please read these instructions and follow them carefully for the safe and economical use of your boiler.
The Glow-worm Hideaway C FF series are fanned flue boilers with a chimney flue adapter. They provide heating and if required, an indirect domestic hot water supply.
The boiler is automatic in operation, having only one user control, the boiler temperature control.
Gas Safety (Installation and Use) Regulations
In your own interests and that of safety, it is the law that ALL gas appliances are installed by a competent person in accordance with the current issue of the above regulations.
WARNINGS
Gas Leak or Fault
If a gas leak fault exists or is suspected the boiler must be turned off, including the electrical supply and must not be used until the fault has been put right. Advice/help should be obtained from the local gas undertaking or your installation/ servicing company.
Clearances
Make sure that nothing obstructs the ventilation grills or clearances.
Minimum clearances must be left around the boiler as shown in diagrams 1.6, 1.7 & 1.8.
Sheet Metal Parts
This boiler contains metal parts (components) and care should be taken when handling and cleaning, with particular regard to edges.
Cleaning
Keep the casing clean by wiping it occasionally with a damp soapy cloth and dry with a polishing cloth.
Do not use abrasive cleaners.
Boilers Installed in a Compartment
If the boiler is fitted in a compartment, cupboard etc., do not obstruct the purpose built compartment vents or the grill on the boiler.
Do not use the compartment for storage purposes.
Protection Against Freezing
If the boiler is to be out of use for any period of time during severe weather conditions we recommend the whole system including the boiler, be drained off to avoid the risk of freezing up. If an immersion heater is fitted to the hot water cylinder make sure it is switched off.
Maintenance
To ensure the continued efficient and safe operation of the boiler it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of servicing will depend upon the particular installation conditions and usage, but in general once a year should be enough.
It is the law that servicing must be carried out by a competent person.
If this appliance is installed in a rented property there is a duty of care imposed on the owner of the property by the current issue of the Gas Safety (Installation and Use) Regulations, Section
35.
To obtain service please call your installer or Heatcall (Glow­worm’s own service organisation) using the telephone number given on the inside of the front panel.
Please be advised that the ‘Benchmark’ logbook should be completed by the installation engineer on completion of commissioning and servicing.
All CORGI Registered Installers carry a CORGI ID card, and have a registration number. Both should be recorded in your boiler Logbook. You can check your installer is CORGI registered by calling CORGI direct on :- 01256 372300.
Boiler Electrical Supply
THIS BOILER MUST BE EARTHED.
The boiler must only be connected to a 230V~50Hz supply protected by a 3A fuse, maximum.
All wiring must be in accordance with the current issue of BS7671.
Heat resistant flexible cable having a conductor size of 0.75mm to the current issue of BS6500 Table 16 must be used.
To Connect an Electrical Plug
The standard colours of three core flexible cable are,
Brown - live, Blue - neutral, Green and Yellow - earth.
As the markings on your plug may not correspond with these colours, continue as follows:
The Blue cable must be connected to the terminal marked “N” or “Black”.
The Brown cable must be connected to the terminal marked “L” or “Red”.
The Green and yellow cable must be connected to the terminal
marked “E” or “Green” or the earth symbol
.
2
,
3
2000225006B
Instructions for Use
To Turn the Appliance On
Turn the electrical supply on to the boiler and check that all remote controls are calling for heat.
Turn the boiler temperature control clockwise to any position between “0” and "Max", see diagram 1. "MAX" is approximately 82°C (180°F).
The boiler lighting operation is now automatic as follows:
The fan operates and after a short period of time, the spark ignition operates, the solenoid opens, then the burner will light shown by the burner ON neon (green) on the control panel lighting up.
The burner will remain alight until switched off by the control thermostat or any remote control.
Note: If the boiler is turned OFF at the boiler temperature control, wait at least 30 seconds before switching on again.
When the boiler switches off, the burner will go out.
The automatic lighting sequence will operate again when heat is required.
It should be noted that this is a fanned flue appliance and fan operation may be heard.
If the reset neon lights, turn the boiler temperature control to "0" (off), wait 30 seconds, then repeat the lighting instructions.
BOILER TEMPERATURE CONTROL
9857
To Turn the Appliance Off
For short periods, turn the boiler temperature control fully anti­clockwise to “0” (off).
To relight, turn the boiler temperature control to any position between “0” and “Max”.
For longer periods, turn the boiler temperature control fully anti­clockwise to “0” (off) and switch off the electrical supply to the boiler.
To relight follow the lighting sequence given above.
"OFF" POSITION
RESET NEON
"BURNER ON" NEON
Diagram 1
2000225006B
4
1 General Data
A
10125
B
C
*
L
M
J
D
C
E
GENERAL DIMENSIONS - given in millimetres
F
L
K
H
G
NOTE: The boiler casing can be set at two heights, MAX. and MIN.
WATER CONNECTIONS Rc1 reduced with DISTRIBUTOR TUBE to
3
Rc (pumped return)
GAS CONNECTION
Rc
WATER CONNECTIONS
Rc1 (1in. B.S.P.T.)
INSIDE DIAMETER OF
*
ADAPTOR FOR 125mm (5in) NOMINAL DIAMETER FLUE TO BS567
3
/
(
/
in. B.S.P.T.)
4
4
1
1
/
(
/
in. B.S.P.T.)
2
2
Diagram 1.1
A B C D E F G H J K L M
mm 387 145 558 294 364 555 442 3 Max 900/ 300 80 32
Min 860
Important Notice
This boiler is for use only on G20 gas.
Wherever possible, all materials, appliances and components to be used shall comply with the requirements of applicable British Standards.
Where no British Standard exists, materials and equipment should be fit for their purpose and of suitable quality and workmanship.
Refer to Manual Handling Operations, 1992 Regulations.
Sheet Metal Parts
WARNING. When installing or servicing this boiler, care should be taken to avoid any possibility of personal injury when handling the edges of sheet metal parts.
1.1 Technical Data
Refer to diagrams 1.1, 1.2, 1.3 and 1.4.
All dimensions are given in millimetres (except as noted)
Approximate weight of complete boiler : 131.5kg (290lb)
Water content : 5.76 litre (1.27gallons)
Gas connection : Rc
Water connection : Rc1 (1in BSPT)
Electrical supply : 230V~50Hz, fused 3A
Burner : Aeromatic
1
/2 (1/2in BSPT)
.
The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is "D" 78.4%.
The value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated have been certified by B.S.I.
1.2 Range Rating
See diagrams 1.2, for boiler ratings.
10153
Diagram 1.2
5
2000225006B
1 General Data
1.3 Statutory Requirements
The installation of this appliance must be carried out by a competent person and must be in accordance with the relevant requirements of the current issue of:
Manufacturer’s instructions supplied.
The Gas Safety (Installation and Use) Regulations, Building Regulations, Local Water Company Bye-laws, The Building Standards (Scotland) Regulations, (applicable in Scotland), Health and Safety at Work Act, Control of Substances Hazardous to Health, Electricity at Work Regulations and any applicable local regulations.
Detailed recommendations are contained in the current issue of the following British Standards and Codes of Practice,
BS6891, BS5440 Part 1 and 2, BS6798, BS5449, BS5546, BS6700, BS7478, BS7593, BS7671.
Manufacturer’s instructions must not be taken as overriding statutory requirements.
1.4 B.S.I Certification
This boiler is certificated by B.S.I., for safety and performance. It is, therefore, important that no alteration is made to the boiler unless agreed, in writing, by Hepworth Heating Ltd.
Any alteration not approved by Hepworth Heating Ltd., could invalidate the B.S.I. certification, boiler warranty and could infringe the current issue of the Statutory Requirements.
To floor level
MAX.900 MIN. 860
MAX.
MIN.
FLOOR LEVEL
BOILER CASING HEIGHT(S)
WORKTOP
9922
BOILER CASING ALTERNATIVE HEIGHT POSITIONS
Diagram 1.3
9923
407 MIN.
1.5 Gas Supply
The gas installation should be fitted in accordance with the current issue of BS6891.
The supply from the governed meter must be of adequate size to provide a steady inlet working pressure of 20mbar (8in wg) at the boiler.
On completion test the gas installation using the pressure drop method and suitable leak detection fluid, purge in accordance with the current issue of BS6891.
1.6 Electrical
WARNING. This boiler must be earthed.
The electrical installation must be carried out by a competent person. All external components shall be of the approved type and shall be connected in accordance with the current issue of BS7671 and any local regulations which apply.
Connection of the boiler and any system controls to the mains supply through an unswitched shuttered socket outlet and 3A fused 3 pin plug, both to the current issue of BS1363. Alternatively, a 3A fused double pole isolating switch may be used, having a minimum double pole contact separation of 3mm, serving only the boiler and system controls.
Heat resistant cable of at least 0.75mm current issue of BS6500 Table 16, must be used for all connections within the boiler casing, to the control box, pump etc.
2
(24/0.20mm), to the
10
407 MIN.
BOILER
CUPBOARDS
MINIMUM CLEARANCES LEVEL WITH WORKTOP
WORKTOP OR FIXTURE
25
10
10
5
BOILER
Diagram 1.4
10
9924
10
1.7 Condensate Drain
A plastic drain pipe may need to be fitted to allow discharge of condensate to a drain.
Condensate should, if possible, be discharged into the internal household draining system. If this is not practical, discharge can be made externally into the household drainage system or a purpose designed soak away, see section 4.10 for more details.
2000225006B
CUPBOARD
MINIMUM CLEARANCES UNDER WORKTOP, FIXTURES
6
CUPBOARD
Diagram 1.5
1 General Data
1.8 Boiler Location
This boiler is not suitable for outside installation.
The boiler casing can be fitted at two heights. Refer to diagram 1.3.
The boiler is assembled at the factory with the control box and heat shield fitted in the lower position.
The boiler must stand on a level floor, conforming with local authority requirements and building regulations. The base temperature is within the requirements of the current issue of BS5258. The boiler may stand on a wooden floor but a metal base plate is required to protect plastic tiles and similar floor coverings.
Suitable installation clearance needs to be available at the sides of the boiler to facilitate direct connection of pipework and making good around the flue assembly. The actual clearance required will vary with site conditions.
When the boiler is to be installed level with work surfaces and the like, minimum clearances should be provided as shown in diagram 1.4. Work tops which overhang the cupboard sides, almost in contact with the casing top, require a larger minimum air gap. Flush sided fixtures require the same overall minimum space but can have a reduced air gap on one side.
Boilers to be installed under work tops or fixtures, should be positioned to provide minimum clearances as shown in diagram
1.5. To facilitate minimum clearances it may be necessary to modify kitchen units and fixtures.
Combustible material must not be 25mm (1in) away from flue components see diagram 1.5.
A front access clearance for servicing, should be provided as shown in diagram 1.6.
The boiler must not be installed in a room used or intended to be used as sleeping accommodation or a room containing a bath or shower.
Where the installation of the boiler will be in an unusual location, special procedures are necessary the current issue of BS6798 gives detailed guidance on this aspect.
A compartment used to enclose the boiler must be designed and constructed specifically for this purpose. An existing cupboard or compartment modified for the purpose may be used. Details of essential features of cupboard or compartment design are given in the current issue of BS6798.
If the boiler is to be installed in a compartment, make sure that nothing will obstruct the openings/vents in the compartment.
700
WALL OR FIXTURE
FRONT CLEARANCE
9713
BOILER
Diagram 1.6
1.9 Heating System Controls
The heating system should have installed: a programmer and room thermostat controlling the boiler.
Thermostatic radiator valves may be installed, however they must not be fitted in a room where the room thermostat is located.
Note: For further information, see the current issue of the Building Regulations, approved document L1, and the references:
1) GIL 59, 2000: Central heating system specification (CheSS) and
2) GPG 302, 2001: Controls for domestic central heating system and hot water. BRECSU.
7
2000225006B
2 Water Systems
2.1 Water Pressure Head
The boiler shall only be connected to a cistern water supply with a minimum head of 1metre (3ft3in) and a maximum head of 27metres (90ft) which has an open vent in the system.
The working pressure must be within the range 0.1bar to 2.7bar (1.3 to 39lbftin
The boiler MUST NOT be connected to a sealed water system.
2
).
2.2 Inhibitor
Attention is drawn to the current issue of BS5449 and BS7593 on the use of inhibitors in central heating systems.
If an inhibitor is to be used in the system, contact should be made with the inhibitor manufacturers so that they can recommend their most suitable product.
When using in an existing system take special care to drain the entire system, including the radiators, then thoroughly clean out before fitting the boiler whether or not adding an inhibitor.
2.3 Gravity Domestic and Pumped Heating
It is recommended that a cylinder thermostat is used to prevent the stored water temperature becoming unnecessarily high when the central heating pump is off.
The domestic primary flow and return must be 28mm o.d. The installation must comply with the current issue of BS5546 and BS6700, see diagram 2.1.
If the above conditions cannot be met, it is suggested that a fully pumped system be used.
2.4 Pumped Heating and Hot Water
Where a single flow and return is taken from the boiler, a minimum static head of 1metre (3ft3in) must be provided between the water line of the feed tank and the centre of the waterway, see diagram 2.2.
2.5 Circulation Pump
Normally the pump should be set to give a temperature difference
o
of 11
C (20oF) across the boiler. At the appropriate pumped flow rate the pressure loss through the boiler can be found from the graph, diagram 2.3.
Use a pump with integral valves or fit isolating valves as close to the pump as possible.
2.6. Cylinder
For all systems supplying domestic hot water the cylinder must be indirect.
2.7 Safety Valve
A safety valve need not be fitted to an open vented system.
2.8 Draining Tap
A draining tap must be provided at the lowest points of the system which will allow the draining of the entire system, including the boiler and hot water cylinder.
Draining taps should be to the current issue of BS2879.
2.9 Thermostatic Radiator Valves
If thermostatic radiator valves are fitted care must be taken to ensure that there is an adequate flow rate through the boiler when they close, refer to the current issue of BS7478 for guidance. If fitted to all radiators ensure a bypass is fitted and adjust to achieve a temperature difference no greater than 20oC between flow and return with the thermostatic valves closed.
REFER TO BS 5546
22mm VENT
15mm COLD FEED
INDIRECT CYLINDER
(Shown with 27metres Max.
LER
1 metre MIN. 27metres MAX.
BOILER C
L
DRAIN OFF COCK
DRAIN OFF COCK
recommended
thermostat and valve).
28mm
PUMP
Distributor tube in pumped return connection
22mm VENT
15mm COLD FEED
PUMP
FULLY PUMPED SYSTEM (DIAGRAMMATIC)
FLOW RATE (GALLON/MINUTE) 0123456789
2.00
1.75
1.50
1.25
1.00
0.75
0.50
WATER PRESSURE LOSS
(metre HEAD OF WATER)
0.25
0
6
0
FLOW RATE (LITRES/MINUTE)
12 18
Heating Circuit
Diagram 2.1
TO INDIRECT CYLINDER
Heating Circuit
Distributor tube in pumped return connection
Diagram 2.2
24 30 36 42
Diagram 2.3
0869
0870
1074
70
60
50
40
30
20
WATER PRESSURE LOSS
10
0
(INCHES HEAD OF WATER)
2000225006B
8
3 Flue and Ventilation
Important Notes
The flue must be installed in accordance with the rules in force in the countries of destination.
The flue must be in accordance with the current issue of BS5440 Part 1.
The Chimney Flue Adapter Kit (Pt. No. 2000461993) socket is designed to take flue pipes to the current issue of BS567. If a flue pipe to BS715 is to be used, an adapter must be fitted to the boiler flue socket.
The flue must be at least equivalent to 1m vertical.
The maximum flue length must not exceed 15m vertical.
Due to the Sedbuk D efficiency of the Hideaway FF if the flue length exceeds the following ;
80C FF - 9m
then provision must be made to ensure that the condensate products are drained away and that the flue liner is of the appropriate specification. We would recommend that one of the following flue liners should be used or an equivalent specification:
Ritevent - Chimflex LW or SB
Selkirk - Selflex TS or TSE
An existing liner must be changed if there is any doubt that it will not operate safely throughout the life of any new appliance.
A drain point is incorporated on the chimney flue adapter to which a drain pipe can be connected, refer to section 4.10.
SEALING AND CLAMPING PLATE
AIR SPACE
150mm (6in) plug of Mineral Wool or similar
SEALING PLATE
600mm
9914
3.1 Flue Guidelines
The flue should be kept as short as possible. Horizontal or very shallow runs of the flue should be avoided as they encourage local cooling.
Always choose a flue route which will cause the least cooling of the flue.
There should be a vertical rise of at least 600mm (2ft) before using a bend. 90o elbows should not be used.
The existing flue may not be completely sound. Therefore, to prevent the possibility of leakage, additional sealing MUST be carried out between the base of the chimney and the flue liner.
The end of the flue liner at the chimney top must be adequately sealed and clamped, using proprietary fittings suitable for the flue liner used, see diagram 3.1.
The flue should, preferably, end above ridge height but at the least above the eaves of a pitched roof. Use a certificated terminal.
If the flue is passed through or near any combustible material it should be installed in accordance with the current issue of BS5440 Part 1.3. If in doubt seek advice from the local gas undertaking or Hepworth Heating Ltd.
3.2 Existing Chimney
An existing brick chimney must be thoroughly swept and all debris cleared away before lining.
Remove any damper or register plate. Alternatively it may be locked in the fully open position.
A flexible flue liner is preferred but a rigid liner may be used, with connection to the boiler flue socket made with a short vertical piece of flexible liner, see diagram 3.2.
The sealing plate also prevents debris falling and gives the flue better insulation, reducing the possibility of condensation, see diagram 3.1.
Check the system efficiency before installing the boiler.
Diagram 3.1
RIGID FLUE LINER
FLEXIBLE LINER
APPROVED SEAL
BOILER
Diagram 3.2
3.3 New Chimney
A newly built chimney can be lined with a moisture resistant lining, such as salt glazed pipe, of an appropriate diameter as specified in the Building Regulations.
In the case of a salt glazed lined flue, it is recommended that a short vertical length of flue pipe, preferably flexible metallic be used. Fix and seal it to the boiler flue socket and make good with an approved seal.
If a flue and false chimney breast are to be constructed all openings for pipework to upper floors etc. must be sealed.
If a specially built compartment is constructed for the boiler, it must conform to the requirements of the current issue of BS5440 Part 1 and BS5871.
9915
9
2000225006B
3 Flue and Installation
3.4 Timber Frame Buildings
If the boiler is to be installed in a timber frame building it should be fitted in accordance with the Institute of Gas Engineers document IGE/UP/7/1998. If in doubt seek advice from the local gas undertaking or Hepworth Heating Ltd.
3.5 Ventilation for Boiler Installed in a Room or Space
If the boiler is to be installed in a room or space a purpose designed permanent ventilation opening, to supply air for combustion, must be provided on an outside wall to external air, refer to the current issue of BS5440 Part 2 for details.
The opening may be directly into the room or the space containing the boiler, or an outside wall of an adjacent room or space which has an internal permanent air vent, of the same size, into the room or space containing the boiler.
Do not ventilate through a bedroom, bedsitting room, private garage or a room containing a bath or shower.
When the boiler is installed in a room or internal space already containing other fuel burning appliances then the air supply of such appliances must be taken into account.
The ventilation opening areas are given in “Air Vent Table ”. The figures quoted refer to the minimum acceptable effective area.
3.6 Ventilation for Boilers Installed in a Compartment
When the boiler is fitted in a compartment, high and low level purpose designed, permanent openings must be provided to supply air for combustion and compartment ventilation.
The cupboard containing the boiler must have the door removed for ventilation reasons.
The air vents must have minimum areas, see “Compartment Air Vent table". The figures quoted refer to the minimum acceptable effective area.
Both the high and low level openings must communicate with the same room, or must both be on the same wall to outside air.
If air vent grilles are fitted to a cavity wall, the opening through the wall must be ducted.
Where ventilation air to a compartment is taken from a room or space, then the room or space must be fitted with a ventilation opening as specified in “Air Vent Table”.
For information regarding compartment requirements refer to the appropriate section of the current issue of BS6798.
FOR ROOM SPACE INSTALLATIONS
EFFECTIVE AREA OF VENT
104cm
2
COMPARTMENT AIR VENT TABLE
COMPARTMENT VENTILATION REQUIREMENTS
VENTILATION FROM ROOM OR SPACE
FROM OUTSIDE
AIR VENT TABLE
2
16in
HIGH LEVEL LOW LEVEL
VENT AREA VENT AREA
205cm2 32in2 409cm2 64in
103cm2 16in2 205cm2 32in
2
2
3.7 Extract Fans
If an extract fan is fitted in the premises, there is a possibility that if adequate inlet openings are not provided, spillage of the products from the boiler could occur.
When openings are fitted in accordance with the current issue of BS5440 Part 2 and this section, extract fans should not cause down draught, but where such fan installations are found, a spillage test must be carried out in accordance with the current issue of BS5440 Part 1 and any corrective work done.
2000225006B
10
4 Installation
General Installation Notes
The appliance pack contains :-
Boiler.
Casing panels, packed seperately.
Loose items fittings pack, see list in pack.
The chimney flue adapter with flue extension is supplied seperately.
Before installation of the boiler make sure that the location selected is in accordance with the requirements of Section 1.8.
4.1 Unpacking
The boiler casing panels are packed separately within the main carton and are designed to enable gas and water connections to be made before fitting the casing panels.
The casing brackets, flue restrictor, distributor tube and other loose items, are in the fittings pack.
IMPORTANT. With regards to the Manual Handling Operations, 1992 Regulations, the following operation exceeds the recommended weight for one man lift.
4.2 Water Connections - Gravity Domestic and Pumped Heating
Fit suitable fittings into the boiler tappings, see diagram 4.1.
Make sure that all pipes are taken backwards and will clear the casings.
Heating flow: Any one of the four upper connections may be used.
Domestic flow: Any one of the three remaining upper connections may be used.
Heating return: The water distributor tube must be fitted into either of the front lower connections on all installations, see diagram 4.2. This tube is in the fittings pack.
Domestic return: Any one of the three remaining lower connections may be used for the gravity domestic hot water return.
Fit plugs into any unused boiler tappings.
4.3 Water Connections - Fully Pumped Systems
Fit suitable fittings into the boiler tappings as required, see diagram 4.3. Make sure that all pipes are taken backwards and will clear the casings.
It is important that all connections are made as shown in diagram 4.3.
Fit the water distributor tube into the return connection, see diagram 4.2. This tube is packed in the fittings pack.
Fit plugs into any unused boiler tappings.
9859
GRAVITY DOMESTIC RETURN TO ANY OF THE 3 REMAINING LOWER CONNECTIONS
WATER CONNECTIONS - GRAVITY DOMESTIC, PUMPED HEATING
UPPER MARKER must lie between the two outer NOTCHES
DISTRIBUTOR TUBE must be in pumped return
connection UPPER MARKER
DISTRIBUTOR TUBE
ALTERNATIVE FLOW POSITIONS
ALTERNATIVE HEATING OR DOMESTIC HOT WATER FLOW
ALTERNATIVE HEATING RETURN With distributor tube (not shown)
Diagram 4.1
1277
Diagram 4.2
9859
WATER CONNECTIONS FULLY PUMPED SYSTEMS
11
ALTERNATIVE RETURN POSITIONS With distributor tube (not shown)
Diagram 4.3
2000225006B
4 Installation
4.4 Pipework
When the front tappings are used, it is essential that any pipework or fittings do not project more than shown in diagram
4.4.
When using a rear tapping with Rc (1in BSP) fitting for 28mm od pipework, it is recommended that a short nipple and an Rc thread (BSP) to copper elbow is used. If the pipework is required to run back to the wall, make sure that it will clear the boiler air duct and, if working to minimum clearance, does not project too far from the boiler, see diagram 4.5.
Do not route any pipework, water or gas, across the front of the combustion chamber cover.
The gas pipework must be along the left hand side of the boiler.
4.5 Casing Brackets
Fit the two upper and two front casing brackets shown in diagram 4.6, using the No.8 screws provided.
NOTE: The screws will already be fitted.
Push the captive nuts, supplied loose, on to the casing brackets as shown in diagram 4.6.
9858
UPPER CASING BRACKET
No.8 SCREW (4)
CAPTIVE NUT
PIPEWORK CASING CLEARANCES
Diagram 4.4
FOR MINIMUM CLEARANCE
9860
9861
No.8 SCREW (4)
FRONT CASING
NUT
BRACKET
CASING BRACKETS FITTING Diagram 4.6
FRONT CASING
CAPTIVE
BRACKET
SIDE CASING (R.H.)
MIN.
LOCATING SLOTS
MAX.
No. 8 SCREW (4)
9863
REAR CONNECTION PIPEWORK (28mm)
2000225006B
Diagram 4.5
SIDE CASINGS FITTING
12
BOILER PLINTH
Diagram 4.7
4 Installation
4.6 Side Casings
Fit the side casings by locating their lugs into the appropriate slot in the boiler plinth, see diagram 4.7, depending on the required height, there are two options, see section 1.7.
Secure the casing sides to the front and rear upper casing brackets with self-tapping screws supplied, see diagrams 4.7 and 4.8.
Note: If the side in-fill panels are being fitted they should be fitted at the same time as the side casing, see next section.
4.7 Side In-fill Panel (if required)
The side in-fill panel is supplied with the boiler, which can be fitted at the rear of the left and right hand side casing but can be discarded if the water connections are made on both sides of the boiler or if the boiler is screened by fixtures. The in-fill panel will usually be fitted on the side where there are no pipework connections.
Insert the push fit plastic location peg, supplied, through the in­fill panel and side casing holes and secure with the spring clips, see diagram 4.9.
NOTE
The boiler is assembled at the factory with the control box and heat shield fitted in the lower casing height position.
SIDE CASING (R.H.SHOWN)
UPPER VIEW
SIDE CASING (R.H. SHOWN)
PLASTIC PEG
SPRING CLIP
SPRING CLIP
IN-FILL PANEL
SCREW
SIDE CASING (R.H. SHOWN)
UPPER CASING BRACKET
Diagram 4.8
IN-FILL PANEL
"LOW" position
"HIGH" position
"LOW" position
"HIGH" position
SELF TAPPING SCREWS (3)
PLASTIC PEG
LOWER VIEW
Diagram 4.9
WING NUT
(3) SELF TAPPING SCREWS (for height adjustment only)
Diagram 4.10
0886
13
2000225006B
4 Installation
4.8 Flue / Boiler Connection
Remove the three self-tapping screws from the lower part of the control box support bracket, see diagram 4.10.
Undo the wing nut that secures the top of the heat shield and carefully hinge down control box and heat shield, see diagram
4.10.
Release the toggle latches that secure the fan access door and remove, see diagram 4.11.
Remove the electrical connections from the fan by pulling the insulation boots only.
Disconnect the air pressure tubes from the fan taking note of their positions.
Remove the fan assembly from the flue hood by removing the securing screw, pull forward and lift up to release the 3 hooked securing lugs underneath the fan, see diagram 4.12.
From the Chimney Flue Adapter Kit take the flue spigot, the gasket is supplied in the fittings pack.
Connect the flue spigot and gasket to the top flue outlet of the boiler using the self tapping screws provided, see diagram 4.15.
From the Chimney Flue Adapter Kit, take the chimney flue adapter and remove restrictor securing screw, select and fit appropriate restrictor :
Marked 'C'
then secure in place with the previously removed screw. To remove plastic end stop, depress the collet.
Slide the Chimney Flue Adapter into the flue spigot until it engages in the bayonet connection and flue duct bend extension piece, then twist clockwise to lock, see diagram 4.15.
Engage the flue duct extension on to the flue duct, secure fan, replace electrical connection and air pressure tubes.
The polarity of the electrical connections is not important.
Make sure that the air pressure tubes are fitted as before, see diagram 4.14 and that the fan duct engages fully into the flue duct extension piece.
IMPORTANT. With regards to the Manual Handling Operations, 1992 Regulations, the following operation exceeds the recommended weight for one man lift.
Place the boiler in position taking care not to damage the casing panels.
TOGGLE LATCHES
SECURING LUGS
FAN ACCESS DOOR
Diagram 4.11
Diagram 4.12
Flue Connection
NOTE: Fix and seal the flue to the hood of the chimney flue adapter in accordance with normal practice.
The flue should be 125mm (5in) nominal diameter, refer to section 3.
2000225006B
FLUE DUCT EXTENSION PIECE
FAN
Diagram 4.13
14
4 Installation
4.9 Water & Gas connections
Replace fan access door, heat shield and control box.
Note: When replacing the fan access door make sure the lip at the top of door fits into and behind the slotted bracket located at the top of the boiler.
As there are two casing height options, the control box height and the heat shield may have to be adjusted to suit your requirements.
Complete the water connections to the boiler.
Fill, vent and flush the system.
Check for any water leaks and put right.
Make the gas connection to the service cock, at the lower left hand side of the boiler, see diagram 1.1.
The whole of the gas installation, including the meter, should be inspected, tested for soundness and purged in accordance with the current issue of BS6891.
4.10 Condensate Drain Connection (If Applicable)
With reference to Section 3, should your flue be greater than the "Dry" flue length stated, then a condensation drain should be fitted.
The condensate drain connection is on the chimney flue adapter, see diagram 4.15. A 22mm plastic overflow pipe should be used to fit on to the drain connection and discharge to a drain. The drain pipe should have a fall of at least 2.5° away from the boiler and should incorporate a 'U' trap.
Condensate should, if possible be discharged into the household internal drainage system. If this is not practicable, discharge can be allowed into the external household drains or by a purpose designed soak away.
It is recommended that any external condensate drain is insulated and also preferably of 32mm diameter, to prevent freezing in adverse weather conditions.
4.11 Top Casing
Refer to diagram 4.16.
Fit two plastic pegs, one on each side, in the holes on the top casing. The plastic pegs are a tight fit and are best pushed home with a flat faced tool.
Secure front of top casing with the two screws provided.
RESTRICTOR SECURING SCREW
END STOP
CHIMNEY FLUE ADAPTER
FLUE SPIGOT
RESTRICTOR
FAN ELECTRICAL CONNECTORS
AIR PRESSURE TUBE (RED)
REAR AIR PRESSURE SWITCH TUBE (RED)
FRONT AIR PRESSURE SWITCH TUBE (CLEAR)
Diagram 4.14
10266
TOP CASING
Diagram 4.15
9865
PLASTIC PEG (2)
SCREW (2)
Diagram 4.16
15
2000225006B
5 Electrical Wiring
SECURING SCREWS
TERMINAL BLOCK
CONTROL BOX
BOILER TEMPERATURE CONTROL
5.1 Control Box Access
Remove control box cover by undoing the four securing screws (two on control box, two on the heat shield) and lift off, see diagram 5.1.
CONTROL BOX COVER
TERMINAL BLOCK CONNECTIONS
9905
bk
Diagram 5.1
5.2 Electrical Connections
WARNING. This boiler must be earthed.
Take care not to damage any internal wiring.
Using heat resistant (85
0.2mm) and of a suitable length, route as shown in diagram 5.3. Thread through the grommet at the bottom rear of the control box, through the cable clamp and connect to appropriate terminals. Tighten cable clamp screws, see diagram 5.2.
Standard colours are, brown - live (L), blue - neutral (N) and green/yellow - earth
The mains cable outer insulation must not be cut back external to the cable clamp.
Make sure the cable is suitably secured.
When making connections make sure that the earth conductor is made of a greater length than the current carrying conductors, so that if the cable is strained the earth conductor would be the last to become disconnected.
o
C) cable of at least 0.75mm2 (24/
.
5.3 Pump Connection
The pump must be connected to the external controls.
5.4 Testing - Electrical
Checks to ensure electrical safety must be carried out by a competent person.
After installation of the system, preliminary electrical system checks as below should be carried out.
1. Test insulation resistance to earth.
2. Test earth continuity and short circuit of all cables.
3. Test the polarity of the mains.
The installer is requested to advise and give guidance to the user of the controls scheme used with the boiler.
Replace the control box cover.
CABLE CLAMP SCREW
MAINS INLET CONNECTOR
HEAT RESISTANT CABLE
CABLE CLIPS
CABLE CLAMP
Diagram 5.2
CABLE CLIPS
Diagram 5.3
2000225006B
16
6 Commissioning
IMPORTANT NOTE
The WARNING NOTICE attached to the front casing be removed by the
Please ensure the “Benchmark” logbook is completed and left with the user, and the magnetic lighting instruction label is placed on the surface of the boiler casing.
user.
must only
6.1 All Systems
Commissioning should be carried out by a competent person in accordance with the current issue of BS6798.
UNDER ALL CIRCUMTANCES the case must be correctly fitted and sealed, unless fault finding.
Make sure that the system has been thoroughly flushed out with cold water without the pump in place.
Refit the pump, fill the system with water, ensuring that all the air is properly vented from the system and pump.
6.2 Initial Lighting and Testing
CAUTION. This work must be carried out by a competent
person, in accordance with the current issue of BS6798.
Make sure that all naked lights and cigarettes are extinguished.
Refer to ‘Instructions for Use’ and identify the controls.
Check that the boiler is isolated from the electrical supply.
Turn the gas service cock “On” , see diagram 6.1.
Purge in accordance with the current issue of BS6891.
WARNING. The multifunctional control and fan operate on mains voltage, terminals will become live.
If programmer control is fitted, make sure it is in the ON mode.
Make sure that any remote controls are calling for heat.
Turn the boiler temperature control clockwise to “Max”.
The ignition system will operate to light the boiler. After a pre­set time if ignition has not taken place the boiler will shutdown.
To re-start the lighting sequence, turn the boiler temperature control to “O”, then fully clockwise to “Max”. "Max" is approximately 820C (1800F).
After the burner has lit, the “Burner on” neon on the control panel will come on.
Isolate the boiler from the electrical supply.
Loosen the burner pressure test point screw and connect a suitable pressure gauge, see diagram 6.1.
Switch on the electrical supply to the boiler.
WARNING. The multifunctional control and fan operate on mains voltage, terminals will become live.
6.3 Testing - Electrical
Turn the boiler temperature control fully clockwise to the maximum setting.
The lighting sequence is automatic as follows:
The fan operates and after a short period of time, the spark ignition operates, the solenoid opens, then the burner will light shown by the “Burner On” neon on the control panel lighting up.
The burner will remain alight until switched off, either by the boiler temperature control, programmer (if fitted) or any remote system control.
To make sure that the flame supervision device is working correctly the following should be done.
With the burner alight, turn the gas service cock “Off”, see diagram 6.1.
After a short period the burner will go out.
BOILER COMPONENTS
A
10052
A
B
F
G
E
A CONTROL BOX B PHIAL POCKET
C
C GAS SERVICE COCK D "BURNER ON" NEON E RESET NEON
D
J
F TEMPERATURE CONTROL G BURNER PRESSURE TEST POINT H GAS PRESSURE ADJUSTMENT SCREW J DATA LABEL
H
Diagram 6.1
17
2000225006B
6 Commissioning
The correct working of the flame supervision is shown by the “Burner On” neon going out and the ignition sequence starting up.
After a short period the boiler will shut down.
If the lighting sequence described fails, refer to fault finding section 9.
To carry on turn the gas service cock “On”, see diagram 6.1.
To re-start the lighting sequence, turn the burner temperature control to “0” then fully clockwise to “Max.”.
During normal operation when the boiler switches “Off”, the burner will go out. The automatic lighting sequence will work again when heat is required.
If the reset neon lights, turn the boiler temperature control to "0" (off), wait 30 seconds, then repeat the lighting instructions.
6.4 Testing - Gas
With the boiler on proceed as follows:
Test for gas soundness around the boiler gas components using a suitable leak detection fluid, in accordance with the current issue of BS6891.
Check the burner gas pressure at least 10 minutes after boiler has lit, refer to Data Label, see diagrams 1.2, 1.3 & 1.4.
If necessary adjust the gas pressure to obtain the required setting turning screw clockwise, to decrease pressure, see diagram 6.1.
Should any doubt exist about the gas rate, check it using the gas meter test dial and stop watch at least 10 minutes after the burner has lit, making sure that all other gas burning appliances and pilot lights are off.
3
The gas rates: Hideaway 80C FF : 2.8m
is for guidance only, dependent on the heat setting.
Turn the boiler temperature control fully anti-clockwise to “0”.
Isolate from the electrical supply.
Remove the pressure gauge from the test point and refit screw, making sure a gas tight seal is made.
When the boiler temperature control is turned to the “0” position, by hand, wait at least 30 seconds before turning On again.
There may be an initial smell given off from the boiler when new, this is quite normal and it will disappear after a short period of time.
/h (87ft3/h)
6.8 Completion
Adjust the boiler temperature control and any system controls to their required settings.
Fit the bottom plinth panel and secure with two dog point screws, see diagram 6.2.
Finally fit the front panel by hooking under front of top panel locating on the two studs and securing at the bottom on to the bottom plinth panel with two screws, see diagram 6.3.
SECURING SCREWS
BOTTOM PLINTH PANEL
LOCATE UNDER LIP
Diagram 6.2
6.5 Testing - All Water Systems
Allow the system to reach maximum working temperature and examine for water leaks.
There should be no undue noise in the system.
The boiler should then be turned off and the system drained off as rapidly as possible,whilst still hot.
Refill system.
6.6 Open Vented System
Ensure there is no pumping over of water or entry of air at the open vent above the feed and expansion cistern.
6.7 Adjustment - Fully Pumped Open Vented System
When commissioning the system the boiler should first be fired on full service, that is, central heating and domestic hot water. Adjust the pump to the system design setting, then balance the system, making adjustments as necessary.
2000225006B
LOCATING STUDS
FRONT PANEL
FRONT PANEL SECURING SCREWS
Diagram 6.3
18
7 Instructions to the User
Instruct and demonstrate the safe and efficient operation of the boiler, heating system and domestic hot water system.
Advise the user, that to ensure the continued efficient and safe operation of the boiler, it is recommended that it is checked and serviced at regular intervals. The frequency of servicing will depend upon the particular installation and usage, but in general once a year should be enough.
Draw attention, if applicable to the current issue of the Gas Safety (Installation and Use) Regulations, Section 35, which imposes a duty of care on all persons who let out any property containing a gas appliance.
It is the Law that servicing is carried out by a competent person.
Advise the user of the precautions necessary to prevent damage to the system and building in the event of the heating system being out of use during frost and freezing conditions.
Reminder - Leave these instructions and the “Benchmark” logbook with the user.
8 Servicing
REMEMBER, When replacing a part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hepworth Heating Ltd.
Products of Combustion Check
Note: To obtain a products of combustion reading, remove the front panel and remove the control box as descibed in the relevant paragraphs of section 4.12. Next, remove the cap from the sampling point, located on the top of the left hand side of the inner casing, see diagram 8.1.
Connect the analyser tube on to the nipple.
WARNING. The multifunctional control and fan operate on mains voltage, terminals will become live.
Switch on the electrical supply and gas supply then operate the boiler.
On completion of the test switch off the electrical supply and gas supply, remove analyser tube and replace sampling point cap.
GAS SERVICE COCK UNION
SECURING SCREW
ELECTRICAL PLUG
Servicing
Before servicing turn off the gas and isolate the electrical supply to the boiler.
After completing a service always test for gas soundness, make electrical checks and carry out functional check on controls.
Unless stated otherwise all parts are replaced in the reverse order to removal.
SAMPLE POINT
Diagram 8.2
ELECTRICAL WIRE RETAINING CLIPS
CONTROL BOX SUPPORT BRACKET
Diagram 8.1
19
Diagram 8.3
2000225006B
8 Servicing
8.1 Access
Remove the boiler front casing panel, refer to section 6.8.
Remove the bottom plinth panel by unscrewing the two dog point screws securing the panel to the boiler plinth, see diagram
8.4.
Disconnect gas valve from gas cock and unplug electrical plug from gas valve, firstly removing electrical plug securing screw, see diagram 8.2.
Unclip electrical wires from control box support bracket, see diagram 8.3.
Undo the four self-tapping screws that secure the combustion chamber front and carefully withdraw it together with the burner and gas valve assembly, taking care not to strain the ignition and earth wire, see diagram 8.5.
Note: When replacing burner in combustion chamber make sure it fits correctly on the guides.
Disconnect the ignition and earth leads from the burner and remove by drawing the leads though the grommet, see diagram
8.5.
Remove the three self-tapping screws from the lower part of the control box support bracket, see diagram 8.6.
Undo the wing nut that secures the top of the heat shield and carefully hinge down control box and heat shield, see diagram
8.6.
Release the two toggle latches that secure the fan access door and remove, see diagram 8.7.
Note: When replacing the fan access door make sure the lip at the top of door fits into and behind the slotted bracket located at the top of the boiler.
Remove the electrical connections from the fan by pulling the insulation boots only.
Disconnect the two silicone tubes from the fan taking note of their positions.
Note: To ease removal of the right hand baffle from the heat exchanger, remove both silicone tubes from the air pressure switch.
Remove fan securing screw, electrical connections and air pressure tubes, then remove fan and flue hood by sliding back to disengage the retaining lugs then lift up.
Remove the flue hood.
When replacing the flue hood ensure that it rests on the guides and that the rear of flue hood is located under the pegs at the rear and pushed down and back fully.
IMPORTANT: When re-fitting fan check that it fits fully into the flue duct extension piece.
BOTTOM PLINTH PANEL
GROMMET
SECURING SCREWS
IGNITION AND EARTH LEADS
Diagram 8.4
COMBUSTION CHAMBER COVER
Diagram 8.5
2000225006B
20
8 Servicing
8.2 Boiler Flueways
Remove flueway baffles noting that there are 2 centre and 2 side flueway baffles, see diagram 8.8.
Place a sheet of paper in the combustion chamber to catch any flue debris.
Thoroughly clean boiler flueways and fins with a suitable stiff brush.
Replace in reverse order, after completing the relevant instructions in sections 8.3 and 8.4.
8.3 Burner and Injector
Remove the two screws and nuts securing the burner support bracket to the combustion chamber cover, see diagram 8.9.
Remove the graphite coated nuts on the supply feed pipe at the rear of the burner to release the burner, see diagram 8.10.
Clean the burner. Use a vacuum cleaner or suitable stiff brush (not wire) to clean the burner thoroughly, making sure that all the burner ports are clear and unobstructed.
Check the burner injector for blockage or damage and replace if necessary, see diagram 8.11.
With the burner removed the injector can be inspected and cleaned as necessary.
For cleaning do not use a wire or sharp instrument on the hole.
If removed, use a little suitable sealant on the external thread when refitting to make sure a gas tight seal is made.
WING NUT
0886
SELF TAPPING SCREWS (3)
Diagram 8.6
FAN
TOGGLE LATCHES
FLUEWAY BAFFLE
HEAT EXCHANGER
BOTTOM PLINTH PANEL
SIDE FLUEWAY BAFFLE
HEAT EXCHANGER
BOTTOM PLINTH PANEL
Diagram 8.7
Diagram 8.8
21
2000225006B
8 Servicing
8.4 Service Checks
Inspect the spark electrode and clean and replace as necessary, see diagram 8.12.
Check the condition of the side and rear insulation panels in the combustion chamber.
Check the condition of the seals on the boiler access door and the combustion chamber cover.
Examine the flue hood and terminal to make sure they are clean and clear of obstructions.
Refit all parts.
Light the boiler and carry out functional tests as described in section 6.
0939
BURNER SUPPORT BRACKET
MAIN BURNER
SUPPLY FEED PIPE
SCREWS & NUTS (2)
Diagram 8.9
GRAPHITE COATED NUT(2)
GRAPHITE COATED NUT(2)
SPARK GAP = 3.6 1.1
BURNER INJECTOR
Diagram 8.11
ELECTRODE
+
-
SECURING SCREW
2000225006B
Diagram 8.10
Diagram 8.12
22
9 Fault Finding
IMPORTANT. On completion of the Fault Finding task which
has required the breaking and remaking of the electrical connections, the continuity, polarity, short circuit and resistance to earth checks must be repeated using a suitable multimeter.
WARNING. The multifunctional control and fan operate on mains voltage, the terminal will be live.
9.1 Electrical
Gain access to the control box, refer to the relevant paragraph in section 6.1, then remove the control box cover, refer to section 5.1.
Refer to: Boiler Fault Finding, see diagram 9.2, Fault Finding Wiring Diagram, see diagram 9.3, Pictorial Wiring Diagram, see diagram 9.4.
BOILER TEMPERATURE CONTROL
0900
Diagram 9.2
Before carrying out fault finding, ensure that gas, electricity and water are available at the boiler. Ensure that any external controls are calling for heat and circuit water is cold. If neon 6 is lit flame failure has occured. Reset boiler by turning temperature control to Off, waiting 30 seconds and then on.
If fault persists continue with fault finding below.
Is neon 1 lit?
YES
Is neon 2 lit?
YES
Is neon 3 lit?
YES
Does sparking take place (Listen for spark discharge.)
YES
Is neon 4 lit?
Appliance working satisfactorily.
NO
NO
NO
YES
?
NO
Is there 230V ac between Ls and N
YES
With electrical supply isolated disconnect the 2 way thermistor plug from the PCB. Check that there is a resistance between 14k - 2.5kOhms.
With electrical supply isolated remove the boiler access door as described in the relevant parts of section 8.1, to gain access to the air pressure switch. Switch on electrical supply Check for 230V ac between N and normally closed contact of air pressure switch.
YES
Check for 230V ac between N and common contact on air pressure switch.
NO
Faulty PCB. Replace.
Does burner light?
YES
Is integrity of electrode and HT lead good?
NO
Replace as necessary
NO
Faulty PCB.
YES
NO
YES
NO
YES
NO
Check for 230V ac between N and brown and between N and black, 3 way connector on PCB.
Check continuity of gas valve harness.
Faulty gas valve. Replace.
Check power supply
Faulty PCB. Replace.
Faulty thermistor. Replace.
Is the fan turning?
Faulty air pressure switch. Replace.
YES
YES
NO
NO
NO
NO
NO
Faulty PCB. Replace.
Is there 230Vac on fan?
YES
Faulty PCB.
Faulty PCB. Replace.
Faulty harness. Replace.
Faulty fan.
9917
ELECTRICAL FAULT FINDING
23
Diagram 9.1
2000225006B
9 Fault Finding
9.2 Electrical Supply Failure
Failure of the electrical supply will cause the burner to go out. Operation will normally resume on the restoration of the electrical supply.
If the burner does not relight after an electrical supply failure and the reset neon on the control panel is lit, turn the burner temperature control to “0”, wait 30 seconds, then fully clockwise to “Max.” see diagram 9.1.
MAINS SUPPLY 230v ~ 50Hz
SL
bk
FUSE TYPE F4A
AIR PRESSURE SWITCH CONNECTIONS
MAIN TERMINAL STRIP CONNECTIONS
PRINTED CIRCUIT BOARD CONNECTIONS
KEY
bk BLACK br BROWN b BLUE p PURLPLE
b
br
br
10084
r RED y YELLOW gy GREY
N
p
r
gy
y
br
bk
SPARK ELECTRODE
(N/O)
EV2
FAN
(N/C)
AIR PRESSURE SWITCH
(C)
EV1
b
b
b
N
Diagram 9.3
2000225006B
24
NEON KEY (see P.C.B)
NEON 1 =
NEON 2 =
NEON 3 =
NEON 4 =
= MAINS ON
= DEMAND ON
= FAN RUNNING
= BURNER LIT
9 Fault Finding
b
p
AIR PRESSURE SWITCH
9866
g
r
y
NEON 5 =
NEON 6 =
KEY
br BROWN bBLUE g/y GREEN/YELLOW g GREY bk BLACK p PURPLE y YELLOW r RED
= SAFETY TEMPERATURE LIMITER
= FLAME FAILURE
g/y
bk
bk
THERMISTOR
bk
FAN
bk
br
GAS CONTROL VALVE
b
g/y
P. C.B (CONTROL BOARD)
F4A FUSE
bk
b
NEON 1 NEON 5
BOILER PILOT FAULT FINDING
MAINS SUPPLY 230V~50Hz
TERMINAL BLOCK
br
g
y
b
NEON 4
b
br
bk b
NEON 6
NEON 2
g/y
S
N
L
g/yg/y
NEON 3
KEY TO TERMINAL BLOCK
S
= LIVE (Switched)
L
= NEUTRAL
N
= EARTH MAIN
p
r
Diagram 9.4
25
2000225006B
10 Replacement of Parts
Important notes
REMEMBER, When replacing a part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Hepworth Heating Ltd.
Replacement of parts must only be carried out by a competent person.
Before removing or replacing any parts, turn off the gas supply at the gas service cock, see diagram 10.2 and isolate the electrical supply to the appliance.
Unless stated otherwise, all parts are replaced in the reverse order to removal.
After replacing any parts always test for gas soundness and if necessary carry out functional check of controls.
10.1 Electrical Thermistor
Remove front panel to gain access, see section 6.8.
Remove control box cover by undoing the four securing screws (two on control box, two on the heat shield) and lift off, see diagram 10.1.
Remove thermistor lead from retaining clip, located on the control box support bracket, see diagram 8.3.
Release strain relief grommet securing thermistor lead at the side of control box.
Disconnect the thermistor electrical plug from the control board (P.C.B) slightly bending back the retaining latch to allow withdrawal, see diagram 10.2.
Remove the retaining wire and withdraw the electrical thermistor from its phial, see diagram 10.3.
Draw the thermistor lead followed by the thermistor out though the control box case.
Re-assembly note. When fitting the thermistor make sure it is fully inserted into the phial, see diagram 10.3. Take care when re-threading retaining wire so as not to damage thermistor.
Disconnect the electrical plugs from the control board (PCB) slightly bending back the retaining latches to allow withdrawal, see diagram 10.2.
Disconnect the ignition lead.
Carefully pull the board away from its supports bending back slightly the retaining latches.
When refitting refer to wiring diagram 9.4.
Take care when replacing the burner temperature control knob by supporting the potentiometer on the P.C.B.
10.3 Electrode
Remove front panel to gain access, see section 6.8.
Refer to the relevant paragraphs of the servicing section to remove the burner from combustion chamber.
To remove the electrode, unscrew the retaining bracket, see diagram 8.12.
Take the electrode out from below and remove the ignition lead.
When removing and replacing the electrode take care not to damage it.
When refitting, check spark gap, see diagram 8.12.
10.4 Multifunctional Control
Remove front panel to gain access, see section 6.8.
Remove the electrical plug securing screw and disconnect the plug, see diagram 10.4.
Disconnect the gas cock, on the left hand side.
Support the multifunctional control, remove the four screws (2 long, 2 short) from the flanged connection at the right hand side.
Remove and discard the original “O” ring from the flanged connection and fit the new “O” ring supplied, into recess, before fitting the replacement multifunctional control.
After assembly test for gas soundness and purge in accordance with the current issue of BS6891.
10.2 Control Board (P.C.B)
Remove front panel to gain access, see section 6.8.
Remove control box lid by undoing the four securing screws (two on control box, two on the heat shield) and lift off, see diagram 10.1.
Carefully pull the boiler temperature control knob away from the P.C.B.
SECURING SCREWS
TERMINAL BLOCK
BOILER TEMPERATURE CONTROL
CONTROL BOX COVER
CONTROL BOX
Diagram 10.1
9905
PHIAL POCKET
PCB
ELECTRICAL PLUGS
Diagram 10.2
0000
THERMISTOR
Diagram 10.3
2000225006B
26
10 Replacement of Parts
10.5 Solenoid
Remove front panel to gain access, see section 6.8.
Remove the electrical plug from the multifunctional control and remove the securing screw and then the solenoid assembly, see diagram 10.4.
10.6 Burner
Refer to the relevant paragraphs of the servicing section to remove the burner from combustion chamber.
10.7 Injector
Refer to the relevant paragraphs of the servicing section to remove the burner from combustion chamber.
The injector can then be unscrewed from the manifold.
When replacing use a little jointing compound on the external thread only, to ensure a gas tight seal.
10.8 Air Pressure Switch
Remove front panel to gain access, see section 6.8.
Refer to the relevant paragraphs of the servicing section to remove the fan access door.
Remove the air pressure tubes and electrical connections from the switch, release the securing screws and remove the switch, see diagram 10.5.
When fitting the replacement make sure that the air pressure tubes are fitted, as shown in diagram 10.5 and the electrical connections are made as shown in wiring diagram 9.4.
10.10 Insulation
Refer to the relevant paragraphs of the servicing section to remove the burner from combustion chamber.
Sides
Undo the burner support bracket nuts and remove support bracket and insulation, see diagram 10.6.
Refit support bracket with new side insulation.
Rear
Bend forward rear insulation securing nibs, one on each side, to release insulation.
Fit new insulation and bend back securing nibs.
10259
AIR PRESSURE SWITCH
10.9 Fan
Remove front panel to gain access, see section 6.8.
Refer to the relevant paragraphs of the servicing section to remove the fan access door.
Remove the electrical connections and air pressure tubes from the fan.
Note: Remove the electrical connections by pulling insulation boots only.
Undo the screw securing the fan to the flue hood and disengage fan from flue hood, see diagram 10.5.
When re-assembling, make sure that the air pressure tubes are fitted as before and that the fan duct engages fully into the flue duct extension piece.
The polarity of the electrical connections is not important.
ELECTRICAL PLUG
GAS SERVICE COCK UNION
SECURING SCREW
SOLENOID SECURING SCREW
SHORT SCREWS (2)
LONG SCREWS (2)
REAR AIR PRESSURE SWITCH TUBE (RED)
SIDE INSULATION
NUTS
SECURING NIB
BURNER SUPPORT BRACKET
ELECTRICAL CONNECTORS
FRONT AIR PRESSURE SWITCH TUBE (CLEAR)
Diagram 10.5
REAR INSULATION PANEL
SOLENOID ASSEMBLY
Diagram 10.4
27
Diagram 10.6
2000225006B
11 Spare Parts
11.1 Part Identification
The key number in diagram 11.1 and the first column of the list will help identify the spare part.
1
8
5
10
4
11.2 Ordering
When ordering any spare part please quote the part number and the description from the list together with the model name and serial number information from the data label.
The data label is positioned on the heat shield, see diagram 6.1.
2
3
6
7
9
10177
Diagram 11.1
Key No. Part No. Description GC Part No.
1 2000461752 Multifunctional control ******
2 221732 Fan ******
3 2000461994 Air pressure switch ******
4 2000461985 Electrical thermistor ******
5 202635 Spark electrode ******
6 2000461714 Boiler temperature control knob ******
7 2000461924 Injector ******
8 227098 Fuse ******
9 227030 Control board ******
10 205656 Burner ******
Because of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.
2000225006B
28
Loading...