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Instructions for Use
High Efficiency Condensing Boilers
To be left with the user
Ultracom cxi
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Glow-worm service call: 01773 828100 Technical helpline: 01773 828300
This boiler contains metal parts (components) and care should be taken when handling and cleaning,
Turn off the gas emergency control valve immediately. Eliminate all sources of ignition, i.e.smoking,
General and Sales enquiries Tel: 01773 824639 Fax: 01773 820569
blowlamps, hot air guns etc. Do not operate electrical lights or switches either on or off.
Under no circumstances must the user interfere with or adjust sealed parts.
Open all doors and windows, ventilate the area.
with particular regard to edges.
SEALED COMPONENTS
METAL PARTS
GAS LEAK OR FAULT
WARNING
G.C. No. 47-019-03
G.C. No. 47-019-02
G.C. No. 47-019-01
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Ultracom
38cxi
Ultracom
30cxi
Ultracom
24cxi
13206
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These instructions are an integral part of the boiler and must, to comply with the current issue of the Gas
Please read these instructions and follow them carefully for the safe and economical use of your boiler.
Safety (Installation and Use) Regulations, be left with the user.
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Fault Finding 15
Advancing the Programmer 14
Setting the Programmer 13
Setting the 24 hour Clock 12
Adjusting Temperature 11
Lighting the Boiler 10
Contents Page
Important Information 5
Boiler Design and Clearances 6
Boiler Safety Devices 7
Servicing, Maintenance and Spare Parts 8
User Control Panel 9
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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.
In your own interests and that of safety, it is the Law that ALL
gas appliances have been installed by a competent person
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 flexible cable are, blue - neutral,
brown - live, green and yellow - earth.
This boiler is certificated 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
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
of 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.
Gas Safety (Installation and Use) Regulations
Important Information
Testing and Certification
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These boilers are designed for use as part of a sealed water
central heating system with fully pumped circulation. The
pump, expansion vessel and associated safety devices are all
fitted within the boiler.
The intelligent control system is designed for both simple
operation and maximum control.
Once the controls are set the boiler operates automatically.
Pluming from flue terminal
Like all condensing boilers it 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.
Compartment or Cupboard Installations
Ventilation is not required for compartment or cupboard
installations. Do not use the compartment or cupboard for
storage.
Description
Boiler Design and Clearances
Diagram 1
200
*5
600
(from casing panels)
CLEARANCES
150
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protected by a separate frost thermostat.
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The burner will switch off when the temperature reaches
35
NOTE: Any other exposed areas of the system should be
O
C.
The burner will only activate if the boiler temperature does not
reach 10
drops to 5
O
C after 30 minutes or at any time if the temperature
O
C.
water falls below 8
The pump will stop after 10 minutes if the temperature is
higher than 10
O
C or has already reached 35
C.
O
C.
company or Glow-worm service.
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
O
The safety discharge valve and discharge pipe is fitted to the
boiler. If there is any discharge from the pipe, switch off the
boiler electrical supply, then call your Installation/Servicing
company or Glow-worm service.
Frost Protection
fault persists.
Safety Discharge Valve
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
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
Boiler Shutdown
The boiler software is designed to recognise the potential for
an overheat lockout and will shutdown before this happens.
Boiler Safety Devices
Condensate Drain Blockage
As a safety feature the boiler will stop working if the condensate
drain becomes blocked. During freezing conditions this may
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Do not use any form of abrasive or solvent cleaner as you may
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damage the paintwork.
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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.
Servicing/maintenance should be carried out by a competent
person 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
To ensure 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 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.
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, refilling and pressurising MUST be carried out
by a competent person, 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 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 and model of the boiler.
The name and model badge is on the front case.
General Note
Servicing, Maintenance and Spare Parts
Frost Protection
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.
Control Panel
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Adjustment Mode
Outdoor sensor (Optional)
Max burner display
Temperature
System Pressure
Programmer
Diagram 2
Appliance OFF
Domestic Hot Water Function
Central Heating
Timed Mode
Ext
Min burner display
Glow-worm control (Optional)
TOGGLE BUTTON
MODE and PROG
Central Heating Function
SYMBOLS DISPLAYED ON THE LCD AND DESCRIPTIONS
DISPLAY
LCD
Eco
Will be displayed when domestic hot
water temperature is less than 50
o
C
BUTTON
RESET
TEMPERATURE
ADJUSTMENT
DHW CH
PROG
User Control Panel
MODE
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A - Central Heating Isolation Valve
B - Domestic Hot Water
C - Gas Service Cock
D - Domestic Cold Water
E - Condensate drain
F - Double Check Inlet Valve
G - Safety Discharge Valve
Diagram 3
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Note: The display will indicate the Heating system
pressure in bar or:
• Water temperature, when heating is on.
• Domestic Hot Water temperature setpoint, when
there is a demand.
• Fault Code (see section Fault Finding)
water taps, then close taps, refer diagram 3.
Note: 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.
1. With no demand from any external controls, switch on
the electrical supply to the boiler.
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3. Turn ON your external controls and select the room
temperature required.
The boiler will operate automatically.
Constant central heating with domestic hot water.
Domestic hot water only.
Boiler functions ALL switched off.
Timed central heating with domestic hot water.
Initial Lighting
Remove the cover plate, refer to the fault finding section on
page 15 and diagram 8.
Check that all isolating valves and the gas service cock on
the appliance are open and that water flows from the hot
Lighting the Boiler
Note: If the electrical supply has been interrupted for any
reason, you may need to set the clock and day before
continuing, refer to diagram 5.
2. Select your required function, refer to diagram 9, press
"Mode" repeatedly to scroll through your options and select
one of the following:-
The "ECO" setting of 50
recommended and ideally suited
to normal family use.
Central Heating
The temperature is factory preset
to the minimum 38
adjusted to a maximum of 82
required, refer to diagram 4.
Economy Setting
adjusted to a maximum of 62
required, refer to diagram 4.
Domestic hot water has priority
over central heating.
The temperature is factory preset
to the minimum 40
Domestic Hot Water
13178
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increase or decrease the temperature.
automatically save after 5 seconds.
The temperature setting will
Press "+ or -" to
increase or decrease the temperature.
automatically save after 5 seconds.
The temperature setting will
Press "+ or -" to
O
C, but can be
O
C as
O
C is
STEP 2
will be displayed "flashing".
the current temperature
Press the "+ or -" once
Eco
°C
O
C, but can be
O
C as
STEP 1
Adjusting Temperature
Domestic Hot Water
Central Heating
will be displayed "flashing".
the current temperature
Press the "+ or -" once
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Diagram 4
°C
STEP 2
STEP 1
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then days (if the installer sets the 7 day function).
The process will automatically scroll to minutes,
Set as previously described for hours.
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Press
"PROG"
PROG
to confirm.
MODE
To set the clock, refer to diagram 5.
Setting the 24 hour Clock
STEP 3
STEP 2
Press and hold "PROG" 5 secs.
the "hours" symbol will flash.
Press the "+" or the "-"
to set the hour.
PROG
STEP 1
MODE
Diagram 5
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Factory preset timed intervals are:-
ON 6.00 - OFF 8.00 ON 16.00 - OFF 23.00
STEP 4
Press "PROG" to validate the time intervals.
The display returns back to display the
current boiler status however if the 7 day
function is enabled the display will move
to the next day.
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"Running Time"
Indicated by solid squares.
Square represents 30 minutes.
STEP 1
Press "PROG" button once to
view the factory default
central heating running times.
24hr Timed Central Heating
To alter the times to suit your requirments, follow "Steps" 1 to 4
Flashing cursor.
PROG
MODE
Setting the Programmer
STEP 2
cursor to the desired time.
Press + or - to
move the flashing
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Diagram 6
13468
STEP 3
Press "+" to add a time segment
or "-" to remove a time segment.
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Diagram 7
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operating mode, "Clock symbol".
Refer to diagram 2.
The activated/deactivated segments will flash for 5 seconds.
Press + and hold for 5 seconds
your appliance will operate until
the next OFF period, or you can
cancel by pressing + for 5 seconds.
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Advancing the timed central heating
programmer ON /OFF times
This function will only work when the appliance is in timed
Advancing the Programmer
COVER PLATE
Appliance fails to light
The LCD will display a flashing 'F' and code number, press
the reset button on the control panel, see diagram 2.
If the display shows a flashing pressure of 0.4bar or less,
then you will need to pressurise the system as described
below.
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.
Filling Central Heating System
Remove the cover plate, see diagram 8.
1. Ensure that the filling loop flexible hose is securely
connected to the double check inlet valve, see diagram 9.
Diagram 8
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Double Check
Inlet Valve
Diagram 9
13539
refer to the section, "Boiler Safety Devices".
VALVES SHOWN CLOSED
Fault Finding
2. Fully open tap "A", then gradually open tap "B" to fill the
heating system to a pressure of 1.0bar. When completed
close the filling taps.
3. IMPORTANT: To comply with the water regulations the
flexible hose must be disconnected from the double check
inlet valve - undo the nut and pull the flexible hose from the
valve.
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,
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13470
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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
www.glow-worm.co.uk
0020020822-02
11.06
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