Glowworm Betacom 24 Datasheet

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INSTALLATION AND SERVICING
High Effi ciency
Combination
Boilers
Glow-worm, Nottingham Road, Belper, Derbyshire. DE56 1JT
www.glow-worm.co.uk
982.160116/000 - 07.06
Betacom
Betacom 24
G.C. No. 47-019-04
Betacom 30
G.C. No. 47-019-05

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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.
We recommend you complete and return as soon as possible
your Guarantee Registration Card.
If your guarantee registration card is missing
you can obtain a copy or record your registration
by telephoning the Glow-worm customer service number 01773 828100.
Guarantee Registration
Customer Service:
01773 828100
Technical Helpline:
01773 828300
General and Sales enquiries:
Tel. [phone]
Fax: [phone]
To register your Glow-worm appliance
call:
0800 0732142

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CONTENTS DESCRIPTION SECTION PAGE
Warnings 4
Important Information 4
General Information 5
Appliance Safety Devices 6
Maintenance and Servicing 6
Technical Information 1 7
Boiler Location and Ventilation 2 12
Flue Options and Terminal Clearances 3 13
Heating System 4 15
Domestic Hot Water System 5 17
Installation Preparation 6 17
Gas/Water & Appliance Connection 7 19
Safety Discharge Valve and
Condensate Connection 8 20
Flue Preparation and Installation 9 22
Electrical Connection 10 34
Commissioning 11 36
Servicing 12 40
Fault Finding 13 43
Replacement of Parts 14 45
Spare Parts 15 47
Manual Handling 16 48
INTRODUCTION
INSTALLATION
INSTRUCTIONS
The instructions consist of two parts, Installation and Servicing Instructions. The instruc-
tions 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.

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Gas Category
This boiler is for use only on G20 natural gas or G31 propane
with the use of an appropriate kit.
Gas Safety (Installation and Use) Regula-
tions
In your own interests and that of safety, it is the Law that ALL
gas appliances are installed by a competent person in accord-
ance with the current issue of the above regulations.
Testing and Certifi cation
This boiler is tested and certifi cated for safety and perform-
ance. It is, therefore, important that no alteration is made to the
boiler, without permission, in writing, by Glow-worm.
Any alteration not approved by Glow-worm, could invalidate
the certifi cation, boiler warranty and may also infringe the cur-
rent issue of the statutory requirements.
CE Mark
This boiler meets the requirements of Statutory Instrument,
No. 3083 The Boiler (Effi ciency) Regulations, and therefore is
deemed to meet the requirements of Directive 92/42/EEC on
the effi ciency requirements for new hot water boilers fi red with
liquid or gaseous fuels.
Type test for purposes of Regulation 5 certifi ed by: Notifi ed
body 0087.
Product/production certifi ed by: Notifi ed body 0086.
The CE mark on this appliance shows compliance with:
1. Directive 90/396/EEC on the approximation of the laws of
the Member States relating to appliances burning gaseous
fuels.
2. Directive 73/23/EEC on the harmonisation of the Laws of
the Member States relating to electrical equipment de-
signed for use within certain voltage limits.
3. Directive 89/336/EEC on the approximation of the Laws
of the Member States relating to electromagnetic compat-
ibility.
Control of Substances Hazardous to Health
Under Section 6 of The Health and Safety at Work Act 1974,
we are required to provide information on substances hazard-
ous to health.
The adhesives and sealants used in this appliance are cured
and give no known hazard in this state.
Electrical Supply
The boiler must be earthed.
All system components shall be of an approved type and all
wiring to current I.E.E. wiring regulations.
External wiring must be correctly earthed, polarised and in ac-
cordance with the relevant standards.
In GB this is BS 7671.
In IE this is the current edition of I.S.813 “Domestic Gas Instal-
lations”.
The boiler must be connected to a permanent 230V ac, 50Hz
supply.
Connection of the whole electrical system of the boiler, including
any heating controls, to the electrical supply must be through
one common isolator and must be fused 3 Amp maximum.
Isolation should be by a double pole switched fused spur box,
with a minimum gap of 3mm for both poles. The fused spur
box should be readily accessible and preferably adjacent to the
appliance. It should be identifi ed as to its use.
Alternatively connection can be made through an unswitched
shuttered socket and 3A fused 3-pin plug both to the current
issue of BS 1363, provided they are not used in a room contain-
ing a bath or shower.
Wiring to the boiler must be PVC 85°C insulated cable, not less
than 0.75mm² (24/0.20mm).
IMPORTANT NOTE
ALL electrical connections to the boiler
must be permanently fi xed to a wall or a
sturdy support feature in a tidy manner.
WARNINGS
Gas Leak or Fault
Turn off the gas emergency control valve immediately. Eliminate all sources of ignition, i.e.smoking, blowlamps, hot
air guns etc. Do not operate electrical lights or switches either on or off. Open all doors and windows,ventilate the
area.
Sheet Metal Parts
This boiler contains metal parts (components) and care should be taken when handling and cleaning, with particular
regard to edges.
Sealed Components
Under no circumstances must the User interfere with or adjust sealed parts.
Important Information

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General Information
General Note
This boiler is designed for use as part of a sealed water cen-
tral heating system with fully pumped circulation. The pump,
expansion vessel and associated safety devices are all fi tted
within the boiler.
Once the controls are set the boiler operates automatically.
Please read these instructions and follow them carefully for the
correct installation and economical use of your boiler.
Water Treatment
In the case of an existing system, it is ESSENTIAL that prior to
installing the new boiler the system is thoroughly fl ushed. For
optimum performance after installation of a new system, the
boiler and its associated central heating system should also
be fl ushed. Flushing should be carried out in accordance with
BS7593: 1992 using a cleanser such as Sentinel X300 or X400,
Fernox Restorer or Salamander corrosion guard cleaner.
For long-term corrosion protection, after fl ushing, a suitable in-
hibitor should be used, refer to the current issue of BS 5449
and BS 7593 on the use of inhibitors in central heating sys-
tems. Examples are Sentinel X100 Fernox Protector or Sala-
mander corrosion guard inhibitor.
Compartment or Cupboard Installations
If the boiler is fi tted into a compartment or cupboard it does not
require ventilation openings.
Do not use the compartment or cupboard for storage.
Clearances
If fi xtures are positioned close to the boiler, space must be
left as shown in diagram 2.1.
Condensate Drain
The condensate drain, see diagram 8.2, must not be modifi ed
or blocked.
Pluming from fl ue terminal
Like all boilers with a fl ue heat exchanger, this appliance will
produce a plume of condensation from the fl ue terminal in cool
weather. This is due to the high effi ciency and hence low fl ue
gas temperature of the boiler. It is normal and not a fault indi-
cation.
Electrical Supply
If the mains electricity and gas are to be turned off for any long
periods during severe weather, it is recommended that the
whole system, including the boiler, should be drained to avoid
the risk of freezing.
NOTE: Contact your installation/servicing company as drain-
ing, refi lling and pressurising MUST be carried out by a com-
petent person.
Manual Handling
IMPORTANT: With regards to the “Manual Handling Opera-
tions, 1992 Regulations”, the appliance exceeds the recom-
mended weight for a one man lift.

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Electrical Supply Failure
The boiler will not work without an electrical supply.
Normal operation of the boiler should resume when the electri-
cal supply is restored.
Reset any external controls, to resume normal operation of the
central heating.
If the boiler does not resume normal operation turn the mode
knob on position. If the boiler does not resume normal op-
eration after this call your Installation/Servicing company.
Overheating safety
In the event of the boiler overheating the safety devices will
cause a safety shutdown. If this happens, turn the mode knob
on position.
Safety Discharge Valve
A safety discharge valve and discharge pipe is fi tted to the
boiler. This valve must not be touched. Should there be any
discharge from the pipe, isolate the boiler electrical supply and
call your installer or Glow-worm’s own service organisation
using the telephone number on the inside front cover of this
booklet.
Appliance Safety Devices
Frost protection
The appliance has a built in frost protection device that protects
the boiler from freezing. With the gas and electric supplies ON
and irrespective of any room thermostat setting, the frost pro-
tection device will operate the pump when the temperature of
the boiler water falls below 5°C.
The burner will switch off when the temperature reaches 30°C.
Condensate Drain Blockage
As a safety feature the boiler will stop working if the condensate
drain becomes blocked. During freezing conditions this may be
due to the forming of ice in the condense drain external to the
house. Release an ice blockage by the use of warm cloths on
the pipe. The boiler should then restart. Contact your installa-
tion/servicing company if the fault persists.
Maintenance and Servicing
Maintenance and Servicing
To ensure the continued effi cient and safe operation of the ap-
pliance 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.
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 is-
sue of the Gas Safety (Installation and Use) Regulations, Sec-
tion 35.
Servicing/maintenance should be carried out by a competent
person in accordance with the rules in force in the countries
of destination.
To obtain service, please call your installer or Glow-worm’s
own service organisation using the telephone number on the
inside front cover of this literature.
Please be advised that the ‘Benchmark’ logbook, located at
back of literature, should be completed by the installation engi-
neer on completion of commissioning and servicing.
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 specifi cation that we require. Do not use recon-
ditioned or copy parts that have not been clearly authorised by
Glow-worm.
If a part is required contact Glow-worm’s own service organisa-
tion using the telephone number on the inside front cover of
this booklet.
Please quote the name of the appliance, this infomation will be
on the name badge on the front of the appliance.
If in doubt seek advice from the local gas company or Glow-
worm’s own service organisation using the telephone number
on the inside front cover of this booklet.

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700
400
300
180
C
L
FLUE
87
84
BOILER
C
L
1 Technical Information
1.1 IMPORTANT
The boiler is supplied in one carton, which includes the appli-
ance packs, see diagram 6.1.
The fl ue is supplied separately.
Where no British Standards exists, materials and equipment
should be fi t for their purpose and of suitable quality and work-
manship.
The installation of this boiler must be carried out by a compe-
tent person in accordance the rules in force in the countries
of destination.
Manufacturer’s instructions must not be taken as overriding
statutory requirements.
1.2 Statutory Requirements
In GB the installation of the boiler must be carried out by a
competent person as described in the following regulations:
The manufacturer’s instructions supplied.
The Gas Safety (Installation and Use) Regulations.
The appropriate Buildings Regulations either The Building
Regulations, The Building Regulations (Scotland),The Building
Regulations (Northern Ireland).
The Water Fittings Regulations or Water byelaws in Scotland.
The Health and Safety at Work Act, Control of Substances Haz-
ardous to Health (COSHH).
The Current I.E.E. Wiring Regulations.
Where no specifi c 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 Regu-
lations and reference should be made to the current ETCI rules
for Electrical Installation.
In GB the following Codes of Practice apply:
BS4814, BS6798, BS5440 Part 1 and 2, BS5546 Part 1,
BS5449, BS6891, BS6700, BS7074 Part 1 and 2, BS7593,
BS7671.
In IE: I.S.813, BS5546, BS 5449, BS 7074, BS 7593.
Manufacturer’s instructions must not be taken as overriding
statutory requirements.
NOTE: For further information, see the current issue of the
Building Regulations, approved document L1 ( in the UK) and
the following current issues of:
1) Central heating system specifi cation (CheSS)
and
2) Controls for domestic central heating system and hot wa-
ter. BRECSU.
Diagram 1.1

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1 Technical Information
1.3 Technical Data
All dimensions are given in millimetres (except as noted).
See diagrams 1.1 and Boiler Specifi cation table.
The data label is positioned on the base of the boiler.
Boiler specification Unit Betacom 24 Betacom 30
Gas category ll2H3+ ll2H3+
Heating output at 80°C/60°C (Hi) kW 18.1 - 24.5 11.1 - 28.6
Efficiency calculated on net calorific value
at 80/60°C
% 94.9 - 95.8 95.2 - 97.1
Heating output at 50°C/30°C (P) kW 19.2 - 26.2 15.9 - 30.6
Efficiency calculated on net calorific value
at 50/30°C
% 101.1 - 102.2 100.5 - 103.8
Heat input (Hs) (heating) kW 21.08 - 28.4 17.76 - 32.74
Heat input (Hs) (DHW) kW 11.65 - 28.4 13.3 - 32.74
Maximum hot water temperature °C 83 83
Heating
Heating temperature range C° 35 - 78 35 - 78
Expansion vessel, useful capacity l 8 8
Expansion tank initial pressure bar 1 1
Safety valve, maximum service pressure
(PMS) bar 3 3
Domestic hot water
Hot water temperature range °C 30 - 55 30 - 55
Specific flow rate (D) (ΔT 25°C) l/min 14.0 16.4
Specific flow rate (D) (ΔT 30°C) l/min 11.7 13.7
Specific flow rate (D) (ΔT 35°C) l/min 10.0 11.7
Threshold flow rate l/min 3 3
Maximum supply pressure bar 6 6
Minimum operating pressure bar 0.8 0.8
Combustion
Product outlet flow rate g/s 15.9 16.4
Product outlet temperature °C 85 70
Values of product outlet (measured on nominal heating output with G20 reference gas):
CO ppm 38.0 54.8
CO2 % 6.40 7.20
NOx balance mg/
kWh
163.1 122.0

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1 Technical Information
Boiler specification Unit Betacom 24 Betacom 30
Dimensions:
Height mm 700 700
Width mm 400 400
Depth mm 300 300
Net weight kg 41.5 43
Supply voltage V/Hz 230/50 230/50
Maximum absorbed power W 145 150
Electric protection IP X4D IP X4D
CE number 0694 BN 3710 0694 BN 3710
Technical data depending on the gas type
Natural gas G 20 (1)
Flow rate at maximum input m3/h 2.71 3.12
Flow rate at minimum input m3/h 1.11 1.27
Inlet pressure mbar 20 20
Burner injector diameter mm 1.25 1.30
(1) 15 °C, 1013,25 mbar
Burner pressure tables
Betacom 24
HEAT OUTPUT PRESSURE mbar
kW Btu/hr G20 G30 G31
9.5 32566 2.1 4.6 4.6
10 34120 2.3 5.0 5.1
11 37532 2.7 6.1 6.2
12 40944 3.2 7.2 7.5
13 44356 3.7 8.4 8.9
14 47768 4.3 9.7 10.4
15 51180 4.9 11.1 12.1
16 54592 5.5 12.5 13.9
17 58004 6.1 14.1 15.9
18 61416 6.8 15.7 18.0
19 64828 7.5 17.4 20.3
20 68240 8.2 19.2 22.7
21 71652 9.0 21.1 25.3
22 75064 9.8 23.1 28.0
23 78476 10.6 25.1 31.0
24 81888 11.4 27.2 34.1
24.5 83594 11.6 28.0 35.6
Betacom 30
HEAT OUTPUT PRESSURE mbar
kW Btu/hr G20 G30 G31
11.1 37832 2.2 4.0 4.0
12 40944 2.6 4.8 4.9
13 44356 3.0 5.8 6.0
14 47768 3.4 6.7 7.0
15 51180 3.9 7.7 8.1
16 54592 4.4 8.7 9.3
17 58004 4.9 9.7 10.5
18 61416 5.5 10.8 11.9
19 64828 6.1 12.0 13.3
20 68240 6.7 13.2 14.9
21 71652 7.3 14.5 16.5
22 75064 7.9 15.8 18.3
23 78476 8.6 17.2 20.1
24 81888 9.3 18.6 22.1
25 85300 10.0 20.0 24.1
26 88712 10.8 21.5 26.3
27 92124 11.5 24.6 30.9
28 95536 12.3 26.3 33.4
28.6 97735 12.7 27.5 35.5

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