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Installation and Servicing
23c
Fanned Flue Combination Boiler
G.C. No. 47-047-18
This is a Cat I
The instructions consist of three parts, User, Installation and Servicing Instructions, which includes the Guarantee Registration
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.
Glow-worm appliances' are manufactured to the very highest standard so we are pleased to offer our customers' a
This product is guaranteed for 24 months from the date of installation or 30 months from the date of manufacture,
whichever is the shorter, for parts. In addition this product is guaranteed for 12 months from the date of intallation or
18 months from the date of manufacture, whichever is the shorter, for labour.
The second year of the parts guarantee, from the beginning of the 13th month onwards after installation or
manufacture, is conditional upon the boiler having been serviced by a CORGI registered gas installer, in accordance
with the manufacturer's recommendations. We strongly recommend regular servicing of your gas appliance, but where
the condition is not met, any chargeable spare parts or components issued within the applicable guarantee period still
benefit from a 12 month warranty from the date of issue by the manufacturer.
We recommend you complete and return as soon as possible your guarantee registration return literature, supplied in
If your guarantee registration return literature is missing you can obtain a copy or record your registration by
One Contact Local Service
Instructions for Use
T o b e l e f t w i t h t h e u s e r
Appliance
2H
Guarantee Registration
Thank you for installing a new Glow-worm appliance in your home.
Comprehensive Guarantee.
the document envelope.
telephoning the Heatcall Customer Service number 01773 828100.
REGISTER YOUR GLOW-WORM APPLIANCE
CALL 0208 247 9857
Customer Services:
Tel: (01773) 828100
Fax: (01773) 828070
optional electro mechanical clock timer shown fitted
Hepworth Heating Ltd.,
Nottingham Road, Belper, Derbyshire. DE56 1JT
General/Sales enquiries:
Tel: (01773) 824141 Fax: (01773) 820569
2000225000B.02.02
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Table of Contents
Related Manuals for Glow-worm 23c
Summary of Contents for Glow-worm 23c
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Page 1: Instructions For Use
Guarantee Registration Thank you for installing a new Glow-worm appliance in your home. Glow-worm appliances' are manufactured to the very highest standard so we are pleased to offer our customers’ a Comprehensive Guarantee. This product is guaranteed for 24 months from the date of installation or 30 months from the date of manufacture, whichever is the shorter, for parts. -
Page 2: Important Information
If you see any exception to this rule, please contact your nearest Glow-worm dealer. Thank you in advance for your assistance. -
Page 3: Table Of Contents
Contents CONTENTS DESCRIPTION SECTION PAGE No. Important Information Introduction INSTRUCTION Controls and Lighting Clock-timer (Optional) FOR USE Draining Safety Devices Servicing and Maintenance Technical Data Dimensions Heating System Design Domestic Hot Water System Design Boiler Schematic INSTALLATION Boiler Location, flue and ventilation INSTRUCTIONS Fixing jig pack Piping System Installation... -
Page 4: Introduction
3mm on both poles. The switch should be readily accessible Controls and lighting Domestic hot water Your 23c boiler has been factory configured to operate at the heart of an existing installation. However, because many The selector switch can be adjusted from a temperature of installations are specially designed, do not hesitate to contact (approx. -
Page 5: Clock-Timer (Optional)
• Turn the gas supply OFF at the gas service cock if Installation/Servicing company or Heatcall. the boiler is to be out of use for a long time. (Glow-worm’s own service organisation) using the telephone number on the front cover of this literature. -
Page 6: Draining
Clock-timer instructions for use Optional Clock-timers inclusive of installation and user instructions:- These are available from your nearest stockist. Electro/Mechanical Part No. 4000122022 Digital Part No. 4000120494 Draining Protection against freezing The boiler has a built in frost protection programme as long as the electricity and gas are left switched on. -
Page 7: Safety Devices
The boiler will be ready to operate when the fault has been cleared. The 23c has a built in frost protection device that protects the boiler from freezing. If the boiler is to be left and there is a risk... -
Page 8: Technical Data
1 Technical Data Heating Electrical Heat input (max) NET Q 25 kW Electrical supply 230 V ~ 50Hz 85,300 BTU/H Electrical rating 122 W fused at 3A Level of protection IPX4D Heat input (min) NET Q 10,4 kW Fuse rating 125mA 35,490 BTU/H Heat output (max) NET P... -
Page 9: Dimensions 2
1000 Flow rate through heating system (I/h) (10 kPa = 1 m WG) Diagram 1.1 2 Dimensions The 23c is delivered in three separate packages: • The boiler • The fixing jig and hanging bracket • The flue system Net lift weight (boiler only) 36 kg... -
Page 10: Heating System Design
3 Heating System Design • The 23c is compatible with any type of installation. an average temperature of 75°C and a maximum service pressure of 3 bar. This pressure setting can be modified at • Heating surfaces may consist of radiators, convectors or fan commissioning stage if the static head differs. -
Page 11: Boiler Schematic
5 Boiler Schematic 1 - Fan. 12 - Ignition module. A - Heating flow B - Domestic hot water outlet 2 - Air pressure switch. 13 - By-pass. C - Gas 3 - Heat exchanger. 14 - Gas valve. D - Cold water inlet 4 - Overheat thermostat. -
Page 12: Boiler Location, Flue And Ventilation
PROVIDING that adequate Standard horizontal extended flue pack, for use with standard consideration is given for Servicing/Repairs at a later date. If horizontal flue pack. any doubt exists, contact the Glow-worm's Technical Helpline Vertical flue pack. 01773 828300. Twin flue pack. -
Page 13: Fixing Jig Pack
7 Fixing Jig Pack The fixing jig is made up as follows: Other components within the fixing jig pack. A - Heating return fitting with isolating valve (v). F - Hanging bracket B - Cold water inlet fitting with isolating valve (m). G - wall template The cold water inlet restrictor supplied with boiler is H - copper connections... -
Page 14: Piping System Installation
8 Piping System Installation 8.1 Fixing jig, see diagram 7.1 • Remove the contents of the fixing jig pack. • Secure the left and right hand support brackets to the isolating valve plate with the securing screws (2 OFF) supplied. •... -
Page 15: Boiler Installation
8 Piping System Installation To avoid low gas pressure problems, it is recommended that the Gas Safety (Installation and use) Regulations 15 mm gas supply on the boiler is connected to using 22 mm In your interests and that of gas safety, it is the law that ALL gas pipe (as close as possible to the boiler within 1 metre). -
Page 16: Flue Installation Telescopic And Standard
10 Flue Installation Telescopic and Standard The Telescopic flue, (adjustable without 10.3 Flue systems side cutting) is suitable for installations that Telescopic Flue require a flue length from 425 minimum to Extend to suit flue length required. 659.5 maximum. There are no extensions or Standard Flue, Refer to diagram 10.1. - Page 17 10 Flue Installation Telescopic and Standard 10.5 Installation of telescopic flue assembly • For flue systems less than 1,5 m long, fit the restrictor (a) in the fan outlet, see diagram 10.7. • The elbow must be removed from the air and flue duct pipes. •...
- Page 18 10 Flue Installation Telescopic flue system (rear and side) The maximum permissible length (L) for the telescopic flue system is 659.5mm. The restrictor (a) must be fitted to inside the fan outlet. FLUE RESTRICTOR GASKET Diagram 10.6 Standard flue system (side only) The maximum permissible length (L) for the standard flue system is 3.0m.
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Page 19: Electrical Connection
Warning: This appliance must be wired in accordance with Table 4b. these instructions. Any fault arising from incorrect wiring cannot be put right under the terms of the Glow-worm guarantee. Important: If a replacement supply cable is required it must be purchased. Part No. S1008600. - Page 20 12 Commissioning Please ensure the “Benchmark” logbook is completed and left with the user. The commissioning and first firing of the boiler must only be done by a qualified registered person. Gas installation It is recommended that any air is purged from the supply at the gas inlet test point on the gas valve, see diagram 12.1.
- Page 21 12 Commissioning • Bleed each radiator to remove air, ensure all • Leave cap on automatic air vent on top bleed screws are re-tightened. of pump open. • If necessary repressurise the system, refer to procedure 4 • Open various hot water taps to bleed system •...
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Page 22: Routine Cleaning And Inspection
14 Settings Bypass The 23c boiler has a built-in bypass. This must be adjusted according to the requirements of the system, refer to the flow rate pressure curve (diagram 1.1). The boiler is supplied with the built-in bypass open a half a turn. It is adjusted by turning the bypass screw (a), see diagram 14.1. - Page 23 15 Routine Cleaning and Inspection To Drain the Domestic hot water circuit BOILER DRAIN VALVE • Close boiler isolating valve (c). • Turn on one or more hot water taps. To Drain the boiler • Close isolating screws on the isolating valves (b), (c) and (d) turn from vertical to horizontal to close.
- Page 24 15 Routine Cleaning and Inspection 15.6 Side panels (for ease of access if 15.13 Central Heating Filter, refer to diagram required), refer to diagram 15.4. 15.11. • Support the side panels as you remove them. Remove the filter retaining clip and filter clean or renew if necessary.
- Page 25 15 Routine Cleaning and Inspection FLUE HOOD BURNER RETAINING SCREWS BURNER GUIDE Diagram 15.7 POWER EARTH HEAT EXCHANGER Diagram 15.9 SUPPLY LEAD LEADS DOMESTIC WATER INLET FILTER CLIP HOUSING AIR PRESSURE SWITCH SENSING TUBE PULL DOWN FAN RETAINING FILTER Diagram 15.10 SCREW Diagram 15.8 RETAINING CLIP...
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Page 26: Fault Finding
16 Fault Finding Before trying to operate the boiler make sure that : • All gas supply cocks are open and that the gas supply has been purged of air. • The heating system pressure is at least 1 bar. •... - Page 27 16 Fault Finding COMPONENT NORMAL MEASURE CHECK Gas control valve If 0 Volt: the gas control valve Under demand during ignition sparks: Resistance of coil 116Ω 24V dc for 1 to 2 seconds, then is not faulty. 12Vdc (constant) at the gas control If 24 Volts and then 12 Volts valve electrical connection.
- Page 28 16 Fault Finding FAULT: NO HEATING, BUT HOT WATER AT TAPS The setting is too low or the boiler Is the heating set high enough ? is set to summer mode. Turn the setting up by turning the central heating temperature control knob clockwise.
- Page 29 16 Fault Finding FAULT: NO HOT WATER, BUT THE HEATING IS WORKING Open it. Is the cold water inlet tap fully open ? Insufficient water pressure. Is the water pressure greater The appliance will not operate. than 0.5 bar ? Find out why the pressure is so low.
- Page 30 16 Fault Finding FAULT: THE BURNER LIGHTS, THEN GOES OUT. The flame is spreading across the With the power turned off, check the whole burner, but not being detected. resistance between the spark electrode CHECK and terminal H23 on the control board (PCB).
- Page 31 16 Fault Finding FAULT: THE RADIATORS ARE LUKE-WARM. Is the installation fitted with a The temperature of the radiators external sensor? depend on the outside temperature. If the room temperature is not sufficient, adjust. Is the installation fitted with a The radiators will only be hot if the room thermostat? thermostat is demanding heat.
- Page 32 16 Fault Finding FAULT: THE FAN DOES NOT START. Does the warning light flash 45 seconds Check the power from the room thermostat. after the start of the demand? Replace the interface board or control board (PCB). Check the fan (loose terminal connector, windings burnt out).
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Page 33: Wiring Diagram
17 Wiring Diagram AIR PRESSURE SWITCH PLUG IGNITOR IGNITION UNIT ELECTRODES SENSE ELECTRODE WATER PRESSURE CHASSIS OVERHEAT SENSOR EARTH THERMOSTAT CONTROL VALVE THERMISTOR PUMP THERMOSTAT 2 INPUT (FROST STAT) THERMOSTAT 1 INPUT (ROOM STAT) MAINS VOLTAGE EXTERNAL 230V CONTROLS CONTROLS BOARD FLOW CONNECTION PLUG... -
Page 34: Replacement Of Parts
18 Replacement of Parts To Drain the central heating circuit BOILER DRAIN VALVE • Open drain valve fitted at the lowest point in the system. • Allow air into the system by opening a radiator bleed screw or the boilers drain valve (a). - Page 35 18 Replacement of Parts 18.2 Fan, refer to ‘Section 15.10 Routine RETAINING Cleaning and Inspection’. CLIPS 18.3 Air pressure switch Before starting refer to the front of Section 18 Important information. • Remove the front panel, refer to Section 15.3. PRESSURE SWITCH •...
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Page 36: Overheat Thermostat
18 Replacement of Parts 18.13 Flame sense electrode 18.9 Burner injector assembly, refer to diagram 18.6. Before starting refer to the front of Section 18 Important information. Before starting refer to the front of Section 18 Important information. • Remove burner, refer to Section 15.9. •... - Page 37 18 Replacement of Parts 18.14 Heat exchanger, refer to diagram 18.8. ELECTRICAL LEAD Before starting refer to the front of Section 18 Important information. CENTRAL • Remove the front panel, refer to Section 15.3. HEATING • Lower the control panel, refer to Section 15.4. THERMISTOR •...
- Page 38 18 Replacement of Parts PCB (CONTROL BOARD) CONTROL BOARD COVER Diagram 18.10 230V CONTROLS INTERFACE BOARD MAINS CONTROL PANEL SWITCH USER INTERFACE BOARD Diagram 18.11 • Unclip control panel user interface and hinge forward . Do not 18.17 User interface board, refer to diagram strain the cables.
- Page 39 18 Replacement of Parts 18.20 Central heating pump head, refer to PUMP diagram 18.12. ELECTRICAL Before starting refer to the front of Section 18 Important CONNECTION information. • Remove the front panel, refer to Section 15.3. • Lower the control panel, refer to Section 15.4. PUMP HEAD •...
- Page 40 18 Replacement of Parts 18.24 Water flow sensor, refer to diagram 18.15. Before starting refer to the front of Section 18 Important information. • Remove the front panel, refer to Section 15.3. • Lower the control panel, refer to Section 15.4. Drain down the boiler, refer to relevant part of Section 18.1.
- Page 41 18 Replacement of Parts 18.27 Automatic air vent, refer to diagram AUTOMATIC 18.18. AIR VENT Before starting refer to the front of Section 18 Important information. • Remove the front panel, refer to Section 15.3. • Lower the control panel, refer to Section 15.4. •...
- Page 42 18 Replacement of Parts 18.31 Igniter unit, refer to diagram 18.22. Before starting refer to the front of Section 18 Important information. • Remove the front panel, refer to Section 15.3. • Lower the control panel, refer to Section 15.4. IGNITER •...
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Page 43: Spare Parts
19 Spare Parts When ordering spare parts, quote the part number and description, stating the appliance model number and serial number from the data badge. Short parts list Description Part No. G.C. No. Central heating thermistor 801933 801926 Air pressure switch 801928 Domestic water flow sensor 801910... - Page 44 Notes Because of our constant endeavour for improvement details may vary slightly from those in the instructions. 2000225000B...
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