XTREME
OPERATION INSTRUCTIONS
High Eiciency Wall-Mounted Gas Boilers
For domestic use only
Installation of the appliance may only be carried out by an installer/competent person.
Please ask your installer to instruct you on how to fill and bleed the appliance and the
installation and on their operation. Strictly abide by all the instructions and warnings.
Always use the appliance in accordance with the Operating Instructions. It is forbidden
to interfere with a sealed component.
Carefully save these operating instructions, preferably near the boiler.
TABLE OF CONTENTS
1 Operation of the boiler 2
1.1 Operation of central heating 3
1.2 Operation of domestic hot water facility 3
2 Control panel and readout 4
2.1 Using the control panel 4
2.2 Operational modes 5
2.3 Changing settings 6
3 Filling and bleeding the boiler and installation 8
3.1 Filling and venting the central heating system 8
© 2018 Intergas Heating Ltd. Subject to modifications.
4 Frost protection 9
5 Maintenance 9
6 Faults and resetting 10
Intergas Heating Ltd 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, eiciency and performance. Benchmark is managed and promoted by the Heating and Hotwater Industry
Council. For more information visit www.centralheating.co.uk. Please ensure that the installer has fully completed the
Benchmark Checklist on the inside back 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 notified to Local Aerea Building Control either directly or through a Competent Persons
Scheme. A Building Regulations Compliance Certificate will then be issued to the customer who should, on receipt,
write the Notification Number on the Benchmark Checklist. This product should be serviced regularly to optimise its
safety, eiciency and performance. The service engineer should complete the relevant Service Record on the Benchmark
Checklist aer each service. The Benchmark cheklist may be required in the event of any warrranty work and as
supporting documentation relating to home improvements in the optional documents section of the Home Information
Pack.
1 OPERATION OF THE BOILER
The Intergas Xtreme series are modulating high eiciency
boilers. This means that the capacity is adjusted according to
the desired heating capacity. Two separate copper circuits are
integrated in the aluminium heat exchanger.
The Intergas Xtremeseries have a second heat exchanger (heat
recovery unit). This second heat exchanger is integrated in the
flue of the boiler so that the eiciency of domestic hot water
is increased further. The residual heat of the flue gases of the
central heating use is also used to preheat the domestic hot
water.
By applying this technology, less energy is required to bring
the water to the correct temperature and an extremely high
eiciency is achieved.
The boiler has a burner controller which, with each heat
demand of the heater or the domestic hot water facility,
controls the pump (only during heat demand of the heater)
and the fan, opens the gas valve, ignites the burner and
continuously monitors and regulates the flame, depending on
the requested capacity.
2
1.1 Operation of central heating
The central heating system water flows through the heat
exchanger and is heated by the burner. The boiler adjusts the
power required to heat the central heating system water to the
required heat demand. The following settings for the heating
are possible:
► On/O control:
The load between the minimum and the maximum value
varies according to the flow temperature set at the boiler.
An on/o thermostat can be connected to the boiler.
► Modulation control:
The load between the minimum and the maximum value
varies based on the flow temperature set by the modulating
controller. The boiler power can be modulated with a
suitable controller, such as an OpenTherm thermostat or an
RF thermostat.
The boiler will receive a notification from the room thermostat
once the desired room temperature has been reached. The
burner controller then turns o the fan, the gas valve is closed
and the burner will be switched o (provided the DHW comfort
function is on “eco” or “o”). The circulation pump continues
to run and has a 1-minute overrun time. The overrun time can
be modified if desired. The pump automatically runs once per
24 hours for ±10 seconds to prevent becoming stuck.
1.2 Operation of domestic hot water facility
The domestic hot water facility is automatically activated as
soon as more than 2 litres/minute of hot water is tapped.
For the quick supply of domestic hot water, the boiler is
equipped with a DHW comfort function. When the DHW
comfort function is activated, the heat exchanger is kept at a
set temperature.
The DHW comfort function has the following settings:
► P-On1:
The DHW comfort function is switched on within the chosen
time blocks. The heat exchanger will maintain temperature
during these time blocks.
Note: This option only to be used in conduction with a
W-plan (Intergas cylinder sensor and 3-port valve) directly
wired to the boiler.
► On:
The DHW comfort function is continuously switched on. The
boiler always supplies domestic hot water immediately.
► Eco:
The DHW comfort function of the boiler is self learning. The
boiler will adapt itself to the pattern of use of domestic hot
water. This means that the heat exchanger will not maintain
temperature during the night or with long absences.
► O:
The heat exchanger is not kept warm, as a result of which
the supply of domestic hot water is somewhat delayed. If
there is no need for a quick supply of domestic hot water,
the DHW comfort function can be switched o.
Water temperature over 125°F (52°C) can cause severe burns instantly
or death from scalds.
Children, disabled, and elderly are at highest risk of being scalded.
See instruction manual before setting temperature at water heater.
Feel water before bathing or showering.
Temperature limiting valves are available, see manual.
1
Only available if clock program is active.
To activate the clock program please contact your installer.
3
2 CONTROL PANEL AND READOUT
8
The boiler has a fully integrated touch screen control panel
and displays information about the operational mode of the
boiler. Symbols (buttons), numbers, points and/or letters are
displayed.
► The buttons on the display will light up
as soon as they are operable and the
lights will be extinguished when the
buttons are no longer available.
► Use only your fingers to operate the
touch screen.
8.8.8.8 : Le display / Desired temperature in °C /
►
Central heating pressure / Fault code / Time
► : - (Minus) button
► : + (Plus) button
: In operation (burner is switched on)
►
► : Power LED
► : DHW operation / DHW comfort setting /
Temperature domestic hot water setting
► : Central heating demand / Adjusting
maximum central heating temperature
► : Service button
► : Enter button
► 8. : Right display / operational code
Control display with all options
2.1 Using the control panel
Touching
Touching and holding for 2 seconds
2sec
4
2.2 Operational modes
The boiler has a number of operational modes:
The boiler is switched o.
The boiler is switched o but is connected to the mains
voltage. In this mode, the display view is characterized by:
► Showing the power LED [ ].
► Showing the pressure in the central heating system (in bar)
on the le display [ ].
► Showing a line on the right display [ ].
The boiler is switched on and is ready for a heat demand.
The boiler is switched on and is ready to answer a request for
either domestic hot water or hot central heating water. In this
mode, the display view is characterized by:
► Showing the power LED. All other symbols and values are
not displayed [ ].
The boiler is switched on and is supplying domestic hot
water.
The boiler is in operation and is supplying domestic hot water
to one of the tap points. The display view is characterized by:
Boiler is switched o
(mains voltage is present, however)
Boiler is switched on
(ready for heat demand)
Boiler is in operation (domestic hot water)
► Showing the power LED [ ].
► Showing the flame. The burner is switched on [ ].
► Showing the tap symbol [ ].
The boiler is switched on and is supplying central heating
water.
The boiler is in operation and is supplying heat to the central
heating system. The display view is characterized by:
► Showing the power LED [ ].
► Showing the flame. The burner is switched on [ ].
► Showing the radiator symbol [ ].
2.2.1 Switching boiler on and o
The boiler can be switched on by touching the control panel
just above the power LED and holding this for 2 seconds.
Boiler is in operation (central heating water)
Switch on boiler
2sec
When the boiler is on, it can be switched o by touching the
control panel just above the power LED and holding this for 2
seconds.
5
Switch o boiler
2sec
2.3 Changing settings
When the boiler is wired to a fuse spur and the mains voltage
is present, the display will be turned on. From here, several
settings can be set and/or modified. Switch the boiler on, if
needed. However, to make/change these settings, it is not
necessary to turn on the boiler.
The structure of the settings is built up from various menus that
are accessible via certain buttons (of button combinations).
The following menus are available:
► Main menu
Higher-level menu from which all other menus are
accessible.
► Domestic hot water menu
Menu in which several domestic hot water-related settings
can be set and/or modified.
► Central heating menu
Menu in which several central heating-related settings can
be set and/or modified.
2.3.1 Main menu
The main menu is accessible by touching the control panel just
above the power LED. The main menu can be requested in a
boiler that is switched on as well as one that is switched o.
Initial setting
The following buttons will light up:
► The domestic hot water symbol
► The central heating symbol
► The Service symbol
2.3.2 Domestic hot water menu
The domestic hot water menu has 2 settings and is accessible
by touching the Domestic Hot Water symbol from the main
menu.
Via the domestic hot water menu:
► the domestic hot water temperature can be modified
(40°C - 65°C, default setting 55°C)
► the DHW comfort function can be modified
The following buttons will light up:
► The Minus symbol
► The Plus symbol
► The Enter symbol
The Central Heating symbol will be extinguished.
The le display will light up and will display the current
domestic hot water temperature by tapping on the Domestic
Hot Water symbol . By touching the Domestic Hot Water
symbol again, it alternates between ‘modify domestic hot
water temperature’ and ‘modify DHW comfort function’.
Main menu
Main menu
To modify the domestic hot water temperature:
1. Touch the Domestic Hot Water button
. The set
temperature is shown on the le display.
2. Using the Plus and Minus buttons, set the desired
temperature (for example, 60°C).
3. Touch the Enter button
to confirm (or wait 30 seconds).
A P appears on the right display (all other buttons are
extinguished), which means the setting has been stored.
4. The display returns to the main menu.
Domestic hot water
menu
Temperature
Confirm
6
For the quick supply of domestic hot water, a DHW comfort
function has been built in. This has the following settings:
► P-On1:
The DHW comfort function is switched on within the chosen
time blocks. The heat exchanger will maintain temperature
during these time blocks.
► On:
The DHW comfort function is continuously switched on. The
boiler always supplies domestic hot water immediately.
► Eco:
The DHW comfort function of the boiler is self learning. The
boiler will adapt itself to the pattern of use of domestic hot
water. This means that the heat exchanger will not maintain
temperature during the night or with long absences.
► O:
The heat exchanger is not kept warm, as a result of which
the supply of domestic hot water is somewhat delayed. If
there is no need for a quick supply of domestic hot water,
the DHW comfort function can be switched o.
To modify the DHW comfort function:
1. Touch the Domestic Hot Water button 2x
. The set DHW
comfort setting is shown on the le display.
2. Using the Plus and Minus buttons, set the desired DHW
comfort setting (for example, ECO).
3. Touch the Enter button
to confirm (or wait 30 seconds).
A P appears on the right display (all other buttons are
extinguished), which means the setting has been stored.
4. The display returns to the main menu.
Main menu
Domestic hot water
menu
Tap comfort
Confirm
2.3.3 Central heating menu
The central heating menu has 2 settings and is accessible by
touching the Central Heating symbol
Via the central heating menu:
► the maximum temperature of the central heating water can
be modified (30°C - 90°C, default setting 80°C)
► the clock program can be set1
The following buttons will light up:
► The Minus symbol
► The Plus symbol
► The Enter symbol
The Domestic Hot Water symbol and the Service symbol
will be extinguished.
The le display will light up and the current temperature of the
central heating water will be displayed.
To modify the temperature of the central heating water:
1. Touch the Central Heating button
of the central heating water is shown on the le display.
2. Using the Plus and Minus buttons, set the desired
temperature (for example, 55°C).
3. Touch the Enter button
A P appears on the right display (all other buttons are
extinguished), which means the setting has been stored.
4. The display returns to the main menu.
from the main menu.
. The set temperature
to confirm (or wait 30 seconds).
Main menu
Central heating
menu
Confirm
1
Only available if clock program is active.
To activate the clock program please contact your installer.
7
To apply the clock program
1
► From a boiler that is in standby or in operational mode
touch the control panel just above the power LED to access
the main menu.
► Touch the Central Heating button. The current
temperature of the central heating water is displayed in the
le display. Touch the Central Heating button again to
switch to the clock program setting.
► Using the Plus and Minus buttons, set the desired
program setting:
► P-on (Program on):
The boiler will respond only on CH demands within the
chosen time blocks. If the clock program does not contain
any valid switching points, the boiler will respond on any
CH demand. The actual time is shown on the le display
indicating that the clock program is active.
► T-on (Temporary on):
The clock program will be temporary overruled. The
boiler will respond to every CH demand until the next “on”
switching point. On the le display t-ON will be shown.
► On (Continuous on):
The boiler will respond to every CH demand without any
time limit.
► O:
The boiler will not respond to any CH demand.
► Touch the Enter button to confirm. The chosen program
setting will be saved in the boiler controller. Aer 2 minutes
of inactivity changes made will also be saved.
A P appears in the right display and the display returns to
the Central Heating menu.
Note: By touching the control panel just above the power
LED instead of the Enter button the display returns to the
Central Heating menu without storing any changes.
3 FILLING AND BLEEDING THE BOILER AND INSTALLATION
3.1 Filling and venting the central heating system
To ensure correct operation of the central heating system, the
pressure in the (cold) installation must be between 1 and 1.5
bar. The pressure can be read on the le display if the boiler is
switched o (see §2.2). If the pressure during central heating
demand is lower than 0.5 bar, this will flash on the display and
the operation of the boiler will be limited to prevent damage to
the boiler. If the pressure is too low, the system must be refilled.
Do this as follows:
► Connect the filling loop and fill the installation with water
to a maximum pressure of 1.5 bar in the case of a cold
installation (Indicated on le display.)
► Bleed the appliance with the manual bleed vent located on
the top le of the boiler.
► Bleed the air in the installation with the manual bleed vents
on the radiators.
► Top up the CH installation if the pressure has dropped too
low as a result of the bleeding air from the system.
► Switch on the boiler by touching the control panel just
above the power LED and holding this for 2 seconds.
► In the event that the system must be
replenished several times a year, please
alert your installer. In that case, there
may be leakage.
Manual air vent
1
Only available if clock program is active.
To activate the clock program please contact your installer.
8
4 FROST PROTECTION
To prevent freezing of the condensation pipe, the boiler must be
installed in a frost-free area. Where possible the condensate pipe
must be installed internally in the property.
The boiler is equipped with a frost protection which, as long
as the mains voltage and gas supply are present, switches
on the central heating pump and, if needed, the burner if the
temperature of the heat exchanger drops too much.
Comment: If an (external) frost thermostat is used in the
installation and it is connected to the boiler, it is not active when
the boiler has been switched o on the control display (see §2.2).
5 MAINTENANCE
The boiler can be cleaned with a damp cloth. Do not use
aggressive or scrubbing cleaning agents or solvents.
The boiler and the system must be inspected annually by an
authorised installer and cleaned if necessary. This also applies
to the flue and air supply duct pipe.
9
6 FAULTS AND RESETTING
If the following simple faults occur on the boiler, they can be
solved as follows.
The central heating system does not become hot or hot
enough:
► Increase the set temperature of the room thermostat.
► Open the radiator valves.
► Set the central heating flow temperature higher; see §2.3.3.
► Vent the system and check the central heating pressure.
The domestic hot water does not become hot or hot
enough:
► The central heating pressure is too low (this is shown
flashing on the display).
► Set the domestic hot water temperature higher; see §2.3.2.
‘F004’ appears in the le display
(service symbol flashes):
► The burner does not ignite. Check whether the gas valve
has been opened and if there is gas at the gas valve.
If so, reset the boiler. If the fault persists, contact your
installer.
Gas valve
► Always contact your installer for
repeated occurrence of these or other
faults.
Requesting fault code
If the burner controller detects a fault, this is shown by a
flashing service symbol
on the display. A fault code, such as
F004, is shown on the le display for 30 seconds. Then the le
display will be extinguished. The service symbol remains
flashing.
The fault code can be requested by touching the flashing
service symbol .
Resetting the boiler
The boiler can be reset by touching the flashing Service
button
and holding it for 2 seconds. The boiler will then be
restarted.
Requesting fault code
Reset
2sec
10
11
Intergas Heating Ltd
Intergas Heating Limited
Unit 2
Easter Park
Worcester Road
Kidderminster
DY11 7AR
Tel: 01527 888000
Fax: 01384 279480
info@intergasheating.co.uk
www.intergasheating.co.uk
2018 Intergas Heating Ltd.
All rights reserved.
The information provided applies to the standard version of the
product. Intergas Heating Ltd can therefore not be held liable for any
damage ensuing from specifications that deviate from the standard
version of the product. Although the available information has been
composed with all possible care, Intergas Heating Ltd cannot be held
liable for any errors in the information or for the consequences of such.
Intergas Heating Ltd cannot be held liable for damage ensuing from
activities that are performed by third parties.
Subject to modifications.
84009403
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