Glowworm ultracom hxi User manual

To b e l e f t w i t h t h e u s e r
www.glow-worm.co.uk
Instructions for Use
High Efficiency Condensing System Boilers
Ultracom hxi

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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

Ultracom
12hxi
Ultracom
15hxi
Ultracom
18hxi
Ultracom
24hxi
Ultracom
30hxi
Ultracom
38hxi
www.glow-worm.co.uk
3
13207
G.C. No. 41-019-01
G.C. No. 41-019-02
G.C. No. 41-019-03
G.C. No. 41-019-04
G.C. No. 41-019-05
G.C. No. 41-019-06

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Contents Page
Important Information 5
Boiler Design and Clearances 6
Boiler Safety Devices 7
Servicing, Maintenance and Spare Parts 8
User Control Panel 9
Lighting the Boiler 10
Adjusting Temperature 11
Fault Finding 11
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.
Gas Category
This boiler is for use only on G20 natural gas but can be
converted for use on G31 propane.
Electrical Connection
The boiler MUST be earthed.
The boiler MUST be connected to a permanent 230V ac, 50Hz
supply, fused at 3A.
Connection of the whole electrical system of the boiler, including
any heating controls, to the electrical supply must be through
one common isolator.
The colours of three core exible cable are, blue - neutral,
brown - live, green and yellow - earth.
Important Information
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.

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Boiler Design and Clearances
Description
These boilers are designed to provide central heating from a
fully pumped open vented or sealed water system and domestic
hot water using a fully indirect cylinder.
Once the controls are set the boiler operates automatically.
Pluming from ue terminal
Like all condensing boilersit willproducea plumeofcondensation
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.
Compartment or Cupboard Installations
Ventilation is not required for compartment or cupboard
installations. Do not use the compartment or cupboard for
storage.
Diagram 1
13204

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Boiler Safety Devices
Boiler Shutdown
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.
The pump will stop after 10 minutes 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) Regulations,
Section 35.
Servicing
This product should be serviced regularly to optimise its safety,
efciency and performance. The service engineer should
complete 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
documentation 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.
Servicing, Maintenance and Spare Parts
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 recon-
ditioned 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 and model of the boiler.
The name and model badge is 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.

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User Control Panel
General Description
The User Control panel consists of
three toggle buttons, a reset button
and display, which will indicate with
symbols the status of the boiler,
refer to diagram 2.
Diagram 2
13474
Control Panel
MODE
PROG
Ext
Ext
t
SYMBOLS DISPLAYED ON THE LCD AND DESCRIPTIONS
Max burner display
Glow-worm control (Optional)
Min burner display
Temperature
Appliance OFF
Central Heating Function
Ext
RESET
BUTTON
NOT
USED
CH TEMPERATURE
ADJUSTMENT
TOGGLE BUTTON
MODE and PROG
LCD
DISPLAY

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Initial Lighting
Remove the cover plate, see diagram 3.
Check that the gas service cock, on the appliance, is open.
Note: 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.
1. With no demand from any external controls, switch on the
electrical supply to the boiler.
Lighting the Boiler
13475
Diagram 4
2. Select your required function, refer to diagram 2, press
"MODE" repeatedly to scroll through your options and select
one of the following:-
Central heating.
Boiler functions ALL switched off.
3. Turn ON your external controls and select the room
temperature required.
The boiler will operate automatically.
Note: The display will indicate the Heating system water
temperature or a fault code (see section Fault Finding).
GAS SERVICE
COCK
(shown open)
COVER PLATE
13540
Diagram 3

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Adjusting Temperature
Diagram 5
13179
Central Heating
Central Heating
The temperature is factory preset to the minimum 38OC, but
can be adjusted to a maximum of 82OC as required, refer to
diagram 5.
OFF
ºC
STEP 1
STEP 2
Press the "+ or -" once
the current temperature
will be displayed "flashing".
Press "+ or -" to
increase or decrease the temperature.
The temperature setting will
automatically save after 5 seconds.
Eco
Appliance fails to light
The LCD will display a ashing 'F' and code number, press
the reset button on the control panel, see diagram 2.
If any fault persists, contact your installer/service provider
or Glow-worm Service, using the telephone number on the
inside front cover of this booklet.
Electrical Supply Failure
The boiler will not work without an electrical supply and normal
operation of the boiler should resume when the electrical supply
is restored.
If the boiler does not resume normal operation, check the
external controls, it may be necessary, to "reset" the boiler,
refer to the section, "Boiler Safety Devices".
Fault Finding

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Because of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.
0020020824-03 05.09
Glow-worm, Nottingham Road, Belper, Derbyshire. DE56 1JT