Glow-worm hxi and Gas Valve User Manual

0020008153-05 11.05

Instructions for Use

Installation and Servicing

To be left with the user

12hxi 15hxi

G.C. No. 41-047-73

G.C. No. 41-047-74

18hxi 24hxi

G.C. No. 41-047-63

G.C. No. 41-047-69

30hxi 38hxi

G.C. No. 41-047-64

High Efficiency

Condensing Boilers

G.C. No. 41-047-71

12041

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

www.glow-worm.co.uk

Guarantee Registration

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

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

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

For customer service call:

01773 828100

Technical helpline: 01773 828300

For General and Sales enquiries:

Tel. [phone]

Fax: [phone]

To register your Glow-worm appliance call:

0800 073 2142

0020008153-05

2

Contents

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

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

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

of the installation.

CONTENTS DESCRIPTION SECTION PAGE No.

Important Information 4

INTRODUCTION

General Information 5
Manual Handling 5

INSTRUCTIONS

FOR USE

INSTALLATION

INSTRUCTIONS

SERVICING

INSTRUCTIONS

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

Technical Information 1 9
Boiler Location and Ventilation 2 13
Flue Location and Ventilation 3 14
Water System 4 16
Installation Preparation 5 20
Boiler Fixing 6 21
Gas, Water and Condensate Conns. 7 22
Flue Preparation Telescopic and Standard Flue 8 24
Electrical Connections 9 27
Commissioning 10 28

Servicing 11 31
Fault Finding 12 35
Replacement of Parts 13 39
Spare Parts 14 44

3

0020008153-05

Important Information

WARNINGS

Gas Leak or Fault

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

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

Sheet Metal Parts

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

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

with particular regard to edges.

Sealed Components

Gas Category

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

Gas Safety (Installation and Use) Regulations

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

Testing and Certification

The boiler is tested and certificated for safety and
performance. It is, therefore, important that no alteration is
made to the boiler unless approved, in writing,
by Glow-worm.

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

CE Mark

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

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

0087.

Product/production certified by: Notified body 0086.

The CE mark on this appliance shows compliance with:

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

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

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

Control of Substances Hazardous to Health

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

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

Insulation Pads / Ceramic Fibre

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

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

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

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

Electrical Supply

The boiler must be earthed.

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

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

In GB this is BS 7671.

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

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

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

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

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

The colours of three core flexible cable are, blue - neutral, brown

- live, green and yellow - earth.

0020008153-05

4

General Information

General Note

This boiler is designed to provide central heating from a fully
pumped open-vented or sealed water system with a fully
indirect cylinder.

Once the controls are set the boiler operates automatically.

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

Water Treatment

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

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

Compartment or Cupboard Installations

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

Do not use the compartment or cupboard for storage.

Condensate Drain

The condensate drain, see section 7.3, must not be modified or
blocked.

Pluming from flue terminal

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

Cleaning

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

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

Electrical Supply

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

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

Clearances

If fixtures are positioned close to the boiler, space must be
left as shown in diagram 2.1. Enough space must also be
left in front of the boiler to allow for servicing.

Manual Handling

IMPORTANT. With regards to the Manual Handling Operations,

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

General recommendations when handling

Clear the route before attempting the lift.

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

Keep load as close to body as possible.

Do not twist – reposition feet instead.

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

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

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

Always use assistance if required.

Removal of carton from delivery van

Recommend 2 person lift or 1 person with use of sack truck. If
1 person is performing lift, straddle the load, tilt and place carton
into position on truck. Recommend secure appliance onto truck
with suitable straps. Ensure safe lifting techniques are used –
keep back straight – bend using legs. Keep load as close to
body as possible. If 2 persons performing lift, ensure co­ordinated movements during lift. Always use assistance if
required.

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

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

5

0020008153-05

Manual Handling

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

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

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

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

Unpacking of appliance from carton.

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

Positioning of Appliance for Final Installation
– no obstructions.

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

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

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

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

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

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

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

0020008153-05

6

Appliance Safety Devices - User Instructions

Electrical Supply Failure Reset Switch

The boiler will not work without an electrical supply.

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

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

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

Overheating Safety

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

Frost Protection

The appliance has a built in frost protection programme as long
as the electricity and gas are left switched on.

This device operates the burner and system pump when the
temperature inside the boiler falls to 30C.

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

Condensate Drain Blockage

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

Maintenance and Servicing - User Instructions

For 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 installation
conditions and usage, but in general, once a year should be
enough.

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

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

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

Please be advised that the installation engineer on completion
of commissioning and servicing should complete the ‘Benchmark’
logbook.

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.

Spare Parts

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

If replacement parts are required contact Glow-worm’s own
service organisation using the telephone number on the inside
front cover of this booklet.

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

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

7

0020008153-05

Operating the Boiler - User Instructions

CONTROLS
FASCIA

CONTROL LIGHT

MAINS RESET
SWITCH

CENTRAL HEATING
WATER TEMPERATURE
CONTROL

DIGITAL
DISPLAY

OPERATION OF THE BOILER

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

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

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

without water.

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

4. With the Central Heating Water Temperature Control in its "OFF" (0) position, turn the Mains Reset Switch to the
ON (1) position, the running lamp will initially illuminate (green) then go off, the system pressure will be
displayed and should read on the digital display, at least 0.7bar (recommended 1.0bar), if less you MUST contact
your installation / servicing company.

9239

Diagram 1

USER CONTROLS

CENTRAL HEATING CONTROL

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

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

Set the control to

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

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

TO RESET

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

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

TO TURN THE BOILER OFF

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

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

'0' to switch off heating.

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

0020008153-05

8

1 Technical Information

1.1 IMPORTANT NOTICE

The boiler is supplied in one carton, which includes a fittings and
documentation pack.

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

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

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

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

1.2 Statutory Requirements

The appliance is suitable only for installation in GB and IE and
should be installed in accordance with the rules in force.

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
Hazardous to Health (COSHH).

The Current I.E.E. Wiring Regulations.

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

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

In GB the following Codes of Practice apply:

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

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

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

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

1) Central heating system specification (CheSS) and

2) Controls for domestic central heating system and hot water.
BRECSU.

Certification

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

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

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

9

0020008153-05

600

MAX.

87

MIN.

1 Technical Information

334

176

48

66

12856

113.5

53

INSIDE WALL
FIXING FACE

CONDENSATE
DRAIN

48

73

TABLE 1

12 hxi = 30kg

TOTAL WEIGHT

GAS CONNECTION Rc1/2 (1/2in BSPT)

WATER CONNECTION 22mm. copper

15 hxi = 30kg
18 hxi = 30kg
24 hxi = 33kg
30 hxi = 33kg
38 hxi = 33kg

33

GAS

600

CONDENSATE
DRAIN

133

30

13

54

375

Diagram 1.1

1.3 Gas Supply

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

In GB this is BS6891.

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

The supply from the governed meter must be of adequate size
to provide a steady inlet working pressure of 20mbar (8in wg)
(Propane G31, 37mbar) at the boiler.

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

ELECTRICITY SUPPLY 230V~50Hz fused 3A

ELECTRICAL RATING 60W

INTERNAL FUSE RATE Main PCB 630mAT

0020008153-05

10

1 Technical Information

12 hxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

Case On 9.3 +0.3 -0.5

2

15 hxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

2

Case On 9.3 +0.3 -0.5

18 hxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

2

Case On 9.3 +0.3 -0.5

24 hxi

TABLE 2

MIN MAX

m3/h

ft3/h

m3/h

ft3/h

m3/h

ft3/h

0.53 1.29

18.7 45.6

MIN MAX

0.53 1.61

18.7 57.0

MIN MAX

0.53 2.00

18.7 70.6

TABLE 2 (cont'd)

30 hxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

Case On 9.3 +0.3 -0.5

2

MIN MAX

m3/h

ft3/h

0.56 3.02

19.8 107

38 hxi

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

1.4 Technical Data

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

See diagram 1.1 and Tables 1 and 2.

The data label is positioned on the inner door, refer to
diagram 1.2.

The Seasonal Efficiency Domestic Boilers UK (SEDBUK) is:
All hxi boilers: Class 'A'.

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

Case Off 8.8 +0.2 -0.5

2

Case On 9.0 +0.3 -0.5

MIN MAX

m3/h

ft3/h

0.67 4.06

23.8 143

BURNER

%CO

APPROXIMATE

GAS RATE

(after 10 mins.

from cold)

Case Off 9.1 +0.2 -0.5

2

Case On 9.3 +0.3 -0.5

m3/h

ft3/h

MIN MAX

0.56 2.58

19.8 91.1

1.5 Condensate Drain

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

Condensate should, if possible, be discharged into the internal
household draining system. If this is not practical, discharge
can be made externally into the household drainage system or
a purpose designed soak away, see Section 7.3 for more
details.

11

0020008153-05

1 Technical Information

12334

12335

12336

12327

11975

12330

Diagram 1.2

0020008153-05

12

2 Boiler Location and Ventilation

2.1 Boiler Location

This boiler is not suitable for outdoor installation.

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

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

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

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

The boiler must be mounted on a flat wall, which is sufficiently
robust to take its total weight, see Table 1. Section 1.

2.2 Clearances

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

2.1.

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

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

12344

5

5

600

†

150

5

2.3 Timber Frame Buildings

If the boiler is to be installed in a timber frame building it should
be fitted in accordance with the Institute of Gas Engineers
document IGE/UP/7/1998 and BG Operational Procedures,
Part 19 Building and Kitchen Work, Section 7 - Timber Frame
Constructions. If in doubt seek advice from the local gas
undertaking or Glow-worm.

2.4 Room Ventilation

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

2.5 Compartment Ventilation

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

Leave existing air vents.

20

200

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

MINIMUM CLEARANCE FROM
PERMANENT SURFACES

Diagram 2.1

20

13

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3 Flue Location and Ventilation

3.1 Flue Options

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

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

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

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

75 min. to 540 max.

WALL THICKNESS

87min

112

3.2 Flue Length

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

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

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

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

208 min. to 413 max.

12839

87min

WALL THICKNESS

112

o

or 2 x 45o elbows

o

12837

176

OUTSIDE
WALL FACE

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

BOILER
MOUNTING WALL

TOP REAR FLUE - STANDARD

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

87min

Max flue length 717mm

20mm
min.
clearance

A

Diagram 3.1

136239

C

L

FLUE

12855

176

OUTSIDE
WALL FACE

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

BOILER
MOUNTING WALL

TOP REAR FLUE - TELESCOPIC

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

87min

Max flue length 589mm

20mm
min.
clearance

A

Diagram 3.3

136239

C

L

FLUE

12854

OUTSIDE
WALL FACE

INTERNAL
SURFACE

A

Max. distance from outside

wall face to min clearance.
LH - 458mm
RH - 561mm

TOP SIDE FLUE - STANDARD

0020008153-05

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

Diagram 3.2 Diagram 3.4

OUTSIDE
WALL FACE

Max. distance from outside
wall face to min clearance.
LH - 330mm
RH - 433mm

INTERNAL
SURFACE

TOP SIDE FLUE - TELESCOPIC

14

A

Min. distance from outside

wall face to min clearance.
LH - 125mm
RH - 228mm

3 Flue Location and Ventilation

MINIMUM SITING DIMENSIONS FOR
FANNED FLUE TERMINALS POSITION MM

HORIZONTAL FLUES

A DIRECTLY BELOW AN OPENING, AIR BRICK,

OPENING WINDOWS 300

B ABOVE AN OPENING, AIR BRICK,

OPENING WINDOWS 300

C HORIZONTALLY TO AN OPENING,

AIR BRICK, OPENING WINDOWS 300

D BELOW GUTTER, DRAIN/SOIL PIPE 25

E BELOW EAVES 25

F BELOW A BALCONY OR CAR PORT 25

G FROM VERTICAL DRAIN PIPES AND

SOIL PIPES 25

H FROM INTERNAL/EXTERNAL CORNERS 25

H TO A BOUNDARY ALONGSIDE THE

*

TERMINAL 300

I ABOVE ADJACENT GROUND OR

BALCONY LEVEL 300

J FROM SURFACE OR A BOUNDARY

*

FACING THE TERMINAL 600

K FACING TERMINALS 1200

L FROM OPENING (DOOR/WINDOW)

IN CAR PORT INTO DWELLING 1200

M VERTICAL FROM A TERMINAL 1500

N HORIZONTALLY FROM A TERMINAL 300

3.3 Terminal Position

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

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

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

H

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

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

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

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

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

3.4 Terminal Guard

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

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

The guard should be similar to that shown in diagram 2.6.

A suitable guard is manufactured by: -

Tower Flue Components

Morley Rd.

Tonbridge

Kent

TN9 1RA.

Size: 280mm x 280mm x 270mm.

TERMINAL GUARD

12325

VERTICAL FLUES

P FROM ANOTHER TERMINAL 600

Q ABOVE ROOF LEVEL 300

R FROM ADJACENT OPENING WINDOW 1000

S FROM ADJACENT WALL TO FLUE 300

Diagram 3.5

15

Diagram 3.6

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