Glowworm Flexicom hx User manual

To be left with the user
www.glow-worm.co.uk
Instructions for Use
High Efficiency Condensing System Boilers
Flexicom hx

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WARNING
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.
Customer service call: 01773 828100 Technical helpline: 01773 828300
General and Sales enquiries Tel: [phone] Fax: [phone]
Glow-worm is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and
commissioning of domestic heating and hot water systems in the UK and to encourage regular servicing to optimise safety,
ef ciency and performance.
Benchmark is managed and promoted by the Heating and Hotwater Industry Council.
For more information visit www.centralheating.co.uk

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G.C. No. 41-315-28
G.C. No. 41-315-29
G.C. No. 41-315-42
G.C. No. 41-315-61
Flexicom
24hx
Flexicom
24hx
Flexicom
24hx
13109
Position of name
badge (typical shown)
G.C. No. 41-315-67
G.C. No. 41-315-68
Flexicom
15hx
Flexicom
12hx
Flexicom
18hx
Flexicom
24hx
Flexicom
30hx
Flexicom
35hx

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Important Information 5
Boiler Design 6
Boiler Safety Devices 7
Maintenance 8
Boiler Operation 9
CONTENTS
These instructions are an integral part of the boiler and must, to comply with the current issue of the Gas Safety (Installation and
Use) Regulations, be left with the user.
Please ensure that the installer has fully completed the Benchmark Checklist in the centre pages of the installation instructions
supplied with the product and that you have signed it to say that you have received a full and clear explanation of its operation.
The installer is legally required to complete a commissioning checklist as a means of complying with the appropriate Building
Regulations (England and Wales).
All installations must be notied to Local Area Building Control either directly or through a Competent Persons Scheme. A Building
Regulations Compliance Certicate will then be issued to the customer who should, on receipt, write the Notication Number on
the Benchmark Checklist.
Please read these instructions and follow them carefully for the safe and economical use of your boiler.

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Gas Safety (Installation and Use) Regulations
In your own interests and that of safety, it is the Law that ALL gas
appliances have been installed by a competent person approved at
the time by the Health and Safety Executive, in accordance with the
current issue of these regulations.
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.
Electrical Connection
The boiler MUST be earthed.
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 to 3 Amps maximum.
The colours of three core exible cable are, blue - neutral, brown - live,
green and yellow - earth.
All connections must be routed through the Installer Interface.
IMPORTANT NOTE
ALL electrical connections to the boiler must
be permanently xed to a wall or a sturdy
support feature.
Gas Category
This boiler is for use only on G20 natural gas.
Testing and Certication
This boiler is certicated to the current issue of EN 483 for
performance and safety.
It is 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
certication, 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
of the Boiler (Efciency) Regulations, and therefore is deemed to meet
the requirements of Directive 92/42/EEC on the efciency requirements
for new hot water boilers red with liquid or gaseous fuels.
Type test for purposes of Regulation 5 certied by: Notied body 0087.
Product/production certied by: Noti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 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.
Important Information

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Boiler Design
Description
The boiler is designed to provide central heating from a fully
pumped open vented or sealed water system with an indirect
cylinder.
The daily pump exercise combined with the built-in frost
protection will help to maintain and protect the boiler.
Once the controls are set the boiler operates automatically.
Compartment or Cupboard Installations
Ventilation is not required for compartment or cupboard instal-
lations.
Do not use the compartment or cupboard for storage.
The minimum clearances to xtures are shown in diagram 1.
Pluming from ue terminal
Like all condensing boilers it will produce a plume of condensation
from the ue terminal in cool weather. This is due to the high
efciency and hence low ue gas temperature of the boiler. It
is normal and not a fault indication.
Electrical Supply Failure
The boiler will not work without an electrical supply and nor-
mal operation of the boiler should resume when the electrical
supply is restored.
If the boiler does not resume normal operation, check the ex-
ternal controls, it may be necessary to "reset" the boiler, refer
to the following section, "Boiler Safety Devices". Diagram 1
12652
A removable compartment door can be placed a minimum of
5mm in front of the appliance but there must be a
clearance of 600mm minimum from a xed surface
*
600
55
150 5
55
150
+
600

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Boiler Safety Devices
Overheat Reset
The boiler software is designed to recognise the potential for
an overheat lockout and will shutdown before this happens. To
restart the boiler, press the reset button, see diagram 2.
If the boiler fails to resume normal operation and all external
controls are calling for heat, then call your Installation/Servicing
company or Glow-worm service.
Frost Protection
With the gas and electric supplies ON and irrespective of any
room thermostat setting, the integral frost protection device will
operate the pump when the temperature of the boiler water
falls below 8OC.
A timer is used so that the temperature can be checked
periodically. After 10 minutes the pump will be stopped if the
temperature is higher than 10OC or has already reached 35OC.
The burner will only activate if the boiler temperature does not
reach 10OC after 30 minutes or at any time if the temperature
drops to 5OC.
The burner will switch off when the temperature reaches 35OC.
NOTE: 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 or Glow-worm service if the fault persists.

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General Note
Servicing/maintenance should be carried out by a
competent person approved at the time by the Health and
Safety Executive, in accordance with the rules in force in the
countries of destination.
If this boiler 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) Regula-
tions, Section 35.
Servicing
This product should be serviced regularly to optimise its safety,
efciency and performance. The service engineer should com-
plete the relevant Service Record on the Benchmark Checklist
after each service. The Benchmark Checklist may be required in
the event of any warranty work and as supporting documenta-
tion relating to home improvements in the optional documents
section of the Home Information Pack.
To ensure the continued efcient 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 site
conditions and usage, but in general, once a year should be
enough.
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.
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.
Frost Protection
If the mains electricity and gas services 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.
Sealed Water Systems
The draining, relling and pressurising MUST be carried out by
a competent person approved at the time by the Health and
Safety Executive, contact your Installation/Servicing company
or Glow-worm Service.
Spare Parts
REMEMBER, When replacing a part on this boiler, use only
spare parts that you can be assured conform to the safety
and performance specication 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 boiler, this infomation will be on
the name badge on the front case.
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.
Maintenance

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1. Check that the gas service isolation valve is open,
see diagram 2.
2. If you are in any doubt about the boiler being lled
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
there is no demand from any external controls.
4. The digital display will indicate the required water
temperature.
5. To operate the boiler follow the instructions as
described on the following pages.
6. Set any external controls as required.
Boiler Operation
14604
Diagram 2

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Description
The boiler User controls consist of a "MODE" button, refer
to diagram 3, which, when pressed and held for 2 seconds,
enters the Central Heating function indicated by a ashing
radiator symbol. After 5 seconds of inactivity the display will
reset to indicate the water temperature.
The "SELECTOR" buttons are used to turn OFF and set the
Central Heating temperature (38 - 82OC).
If a fault occurs, indicated by a ashing 'F' and code number,
press the reset button positioned below the digital display.
If a fault persists, indicated by a ashing 'F' and code
number, contact your installer/service provider or Glow-
worm Service using the telephone number on the inside front
cover of this booklet.
Boiler Operation - User Controls

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Boiler Operation - Display
14513
MODE
MODE
Diagram 3

0020057280-04 02.10
Because of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.
Glow-worm, Nottingham Road, Belper, Derbyshire. DE56 1JT
0020057280