Elnur MATTIRA MAS15 User manual

Please read these instructions carefully before
installing or using this appliance for the first time.
Installation Instructions
MATTIRA
Digital Modulating Electric Boilers
MAS15 | MAS18

Elnur powered by Gabarrón | MATTIRA | Installation Guide 2
1 Important ..................................................................................................2
2 Safety .............................................................................................................2
3 Introduction ........................................................................................... 2
3.1 Design & Operation .........................................................................3
3.2 Principle Components .................................................................3
3.3 Key To Components .......................................................................3
3.4 Safety Devices ......................................................................................4
4 Installation ..............................................................................................4
4.1 General Requirements ................................................................4
4.2 Unpacking & Contents ................................................................4
4.3 Location ........................................................................................................5
4.4 Dimensions & Connections ................................................... 5
4.5 Clearances ................................................................................................5
4.6 Typical Installation Layout ......................................................6
4.7 Water Connections - General 4.9 ...................................6
4.8a Central Heating Connections, ............................................6
Design & Requirements
4.8b Pump Duty .................................................................................................8
4.9 Electrical Connections ................................................................8
5 Commissioning ................................................................................10
5.1 Installation Parameters ............................................................10
5.2 Limiting Boiler Maximum Output ................................... 11
Heating System Flushing
5.4 Heating System Initial Filling ..............................................12
5.5 Pump Checking & Venting .....................................................12
5.6 Filling Domestic Hot Water ...................................................12
5.7 More Installation Data ...............................................................12
6 Operating The Boiler .................................................................13
6.1 Initial Switching On ........................................................................13
6.2 Control Panel Description ......................................................13
6.3 Domestic Hot Water Operation ......................................14
6.4 Central Heating Operation ...................................................14
6.5 Anti-Freeze Mode ............................................................................14
6.6 User Parameters ...............................................................................15
6.7 Heating Modulation Feature ..............................................15
6.8 Legionella Protection ..................................................................16
7 Trouble Shooting ............................................................................17
7.1 Possible Faults & Solutions ..................................................17
7.2 Overheat Lock-Out & Re-Setting ...................................18
7.3 Heating Flow Switch – E3 Error ........................................18
7.4 Checking Rated Heat Output ...........................................18
8 Main Components List ...........................................................19
9 Maintenance & Care .................................................................19
10 Environmental Information .............................................19
11 Technical Data ................................................................................20
12 Declaration Of Conformity ...............................................21
13 Product Fiche ................................................................................... 22
14 Wiring Diagrams .......................................................................... 22
15 Warranty ................................................................................................. 23
16 Installation Commissioning Checklist ........... 24
16.2 Central Heating System ........................................................ 24
16.3 Electrical Installation ................................................................. 25
17 Maintenance Checklist ...................................................... 26
18 Service Record ................................................................................27
INDEX
1 IMPORTANT
The following installation instructions are intended to guide the competent person throughout
the entire installation process.
The boiler’s guarantee does not cover any damage caused by non-observance of any of these
instructions.
These installation instructions and user’s guide must be conserved and given to any new user.
Connections can come loose in transit, and all should be checked before installation.
The symbols used in the text are explained below:
WARNING: This indication shows the possibility of causing death from electric shock.
WARNING: This indication shows the possibility of causing death or serious injury.
CAUTION: This indication shows the possibility of causing injury or damage to
properties only.
Symbol For Useful Information.
!

Elnur powered by Gabarrón | MATTIRA | Installation Guide 3
2. SAFETY
• This appliance is not for use by anyone (including
children) with reduced physical, sensorial or mental
capacities or those who do not know how to use
the appliance, unless they are supervised or
instructed by a person responsible for their safety.
• Check that the voltage on the indicator plate of the
boiler coincides with the voltage of the mains circuit
to which it is going to be connected.
• The use of these boilers in the presence of gases,
explosives or inflammable objects is prohibited.
• The air inputs and outputs of the boiler ensure its
correct operation and protect it from over-heating.
They must never be covered.
• This boiler must be disconnected from the mains
electricity before carrying out any internal repairs.
• The boiler must be installed in such a manner that
the switches or other controls cannot be touched
by anyone who is using the bath or shower.
• The installation must be performed in accordance
with current IEE Wiring Regulations, Building
Regulations, Water Fitting Regulations (England &
Wales) or Water Byelaws (Scotland) and all relevant
British Standards.
• This appliance is designed to be permanently
connected to a fixed installation. The power circuit
of the boiler must incorporate an omni-polar
cut-off switch with a separation between the
contacts of at least 3 mm.
• The electricity supply circuit must incorporate
a Residual-Current Device.
• This boiler must be earthed.
• All the models incorporate different safety elements.
If one or more of them are activated, consult section
7. Trouble Shooting.
• The presence of air particles of smoke, dust and
other pollutants may stain the walls and areas close
to the appliance.
• Any improper use is forbidden.
• Do not install the boiler in rooms prone to frost.

Elnur powered by Gabarrón | MATTIRA | Installation Guide 4
3.4 Safety Devices
Safe operation under various conditions is ensured \by
the following controls fitted inside the boiler:
• Water flow switch that monitors water flow in the
heating system and will prevent operation in case
of a blockage, if the system flow rate is below the
permitted level, error E3 will appear. Installation of
a system by-pass may be necessary (see 7.3
HEATING SYSTEM FLOW SWITCH – E3 ERROR & SYSTEM
BY-PASS REQUIREMENTS).
• Heating system high limit safety thermostat will
prevent operation if the temperature exceeds 100ºC.
It requires re-setting manually.
• Heating system pressure relief valve will discharge
to relieve excess pressure at 3 bar. (Requires piping
to a safe external discharge point.)
4. INSTALLATION
IMPORTANT PRE- INSTALLATION POINTS
In order to ensure the successful installation
and operation of your Gabarrón boiler,
please consider the following points before
commencing.
SITING THE BOILER
Allow sufficient clearance and access for operating,
maintenance and repair work.
Boiler must be protected from any water, moisture or
dampness. Where installations are in a bathroom, the
installation must comply with the relevant electrical
regulations.
Boiler electrical protection rating is IP20/IP2X. This boiler
is not designed to be installed in the open air.
The boiler must be installed in the upright position.
ELECTRICAL POWER SUPPLY & WIRING
Competency for electrical installation is required.
The power supply must meet the capacity for the
heat output required plus all other appliance that
may be supplied. The cable, MCB and RCD must be of
sufficient capacity to carry the required load.
HEATING SYSTEM & CONTROLS
Any existing system must be suitable for sealed system
operation at up to 3bar pressure and will require
flushing/cleansing in accordance with the Building
Regulations. Any new heating system must be flushed
and cleansed in accordance with the Building Regulations.
A SYSTEM filling loop, isolation valves and drain point
are required.
A time clock/room thermostat should be installed
(Necessary to activate automatic power modulation).
A bypass circuit (min 2m recommended) incorporating
an automatic bypass valve must be installed on all
central heating systems where TRV’s are fitted to
every radiator. Note - A bypass circuit incorporating
an automatic bypass valve is recommended for all
installations. The correct heat requirement for the
dwelling should be calculated.
4.1 General Requirements
Installation should also be in accordance with the
relevant British Standards and Codes of Practice
including the following:
BS7074 Application, selection and installation of
expansion vessels and ancillary equipment for sealed
water systems.
BS 7671 Requirements for electrical installations,
IEE Wiring Regulations.
4.2 Unpacking & Contents
WARNING: Wall and fixings must
be suitable to support the total
weight; MATTIRA MAS boiler when
full is 50kg.
!
WARNING: Before carrying out any
work inside the boiler and obtaining
access to terminals, all supply
circuits must be disconnected.
WARNING Earth the appliance. If the
appliance is not earthed, it may hold
voltage if a defect occurs.
!
Boiler is supplied set at maximum
output and must be adjusted to suit
the incoming supply before being
switched on. (See 5.2 LIMITING
BOILER MAXIMUM OUTPUT).
!
4





3.4 SAFETY DEVICES
Safe operation under various conditions is ensured by the
following controls fitted inside the boiler:
oWater flow switch that monitors water flow in the
heating system and will prevent operation in case of a
blockage, if the system flow rate is below the permitted
level, error E3 will appear. Installation of a system by-pass
may be necessary (see 7.3 HEATING SYSTEM FLOW
SWITCH –E3 ERROR & SYSTEM BY-PASS
REQUIREMENTS).
oHeating system high limit safety thermostat will prevent
operation if the temperature exceeds 100ºC. It requires
re-setting manually.
oHeating system pressure relief valve will discharge to
relieve excess pressure at 3 bar. (Requires piping to a
safe external discharge point.)
4 INSTALLATION
IMPORTANT PRE- INSTALLATION POINTS
In order to ensure the successful installation
and operation of your Gabarrón boiler, please
consider the following points before commencing.
SITING THE BOILER
WARNING Wall and fixings must besuitable to
support the total weight; MATTIRA MAS boiler
when full is 50kg.
Allow sufficient clearance and access for operating,
maintenance and repair work.
Boiler must be protected from any water, moisture or
dampness.
Where installations are in a bathroom, the installation must
comply with the relevant electrical regulations.
Boiler electrical protection rating is IP20/IP2X. This boiler is
not designed to be installed in the open air.
The boiler must be installed in the upright position.
ELECTRICAL POWER SUPPLY & WIRING
WARNING Before carrying out any work inside
the boiler and obtaining access to terminals, all
supply circuits must be disconnected.
WARNING Earth the appliance. If the appliance is
not earthed, it may hold voltage if a defect occurs.
Competency for electrical installation is required.
The power supply must meet the capacity for the heat
output required plus all other appliance that may be supplied.
The cable, MCB and RCD must be of sufficient capacity to
carry the required load.
Boiler is supplied set at maximum output and must be
adjusted to suit the incoming supply before being switched
on. (See 5.2 LIMITING BOILER MAXIMUM OUTPUT).
HEATING SYSTEM & CONTROLS
Any existing system must be suitable for sealed system
operation at up to 3bar pressure and will require
flushing/cleansing in accordance with the Building Regulations.
Any new heating system must be flushed and cleansed in
accordance with the Building Regulations.
A SYSTEM filling loop, isolation valves and drain point are
required.
A time clock/room thermostat should be installed
(Necessary to activate automatic power modulation).
A bypass circuit (min 2m recommended) incorporating an
automatic bypass valve must be installed on all central
heating systems where TRV's are fitted to every radiator.
Note - A bypass circuit incorporating an automatic
bypass valve is recommended for all installations.
The correct heat requirement for the dwelling should be
calculated.
4.1 GENERAL REQUIREMENTS
Installation should also be in accordance with the relevant
British Standards and Codes of Practice including the
following:
BS7074 Application, selection and installation of expansion
vessels and ancillary equipment for sealed water
systems.
BS 7671 Requirements for electrical installations, IEE Wiring
Regulations
4.2 UNPACKING & CONTENTS
Dispose of the cardboard packaging at a cardboard
recycling site. Observe national regulations.
i
i
i
- Wall bracket with template.
- Boiler.
- Documentation.
- Bag with connecting links.
Dispose of the cardboard packaging
at a cardboard recycling site.
Observe national regulations.
!

Elnur powered by Gabarrón | MATTIRA | Installation Guide 5
5
4.3 LOCATION
WARNING INSTALL UPRIGHT ON A WALL
SUITABLE TO SUPPORT THE TOTAL WEIGHT OF THE
BOILER –40 kg.
The location should be clean and dry with no presence of
gases, explosives or flammable objects.
It is not suitable for installation outside and should be
protected from moisture and frost.
The boiler must be sited so that the boiler and controls are
not accessible to any persons whilst using a bath or shower
and there should be no possibility of water dripping or
splashing onto the boiler or controls.
Electrical safety regulations for clearances must be followed
if installed in a bathroom or shower area.
The boiler has an electric protection rating of IP20/IP2X.
The power supply cable should be carefully routed and
secured and provision made for a suitable isolation switch
and MCB/RCD.
4.4 DIMENSIONS & CONNECTIONS
4.5 CLEARANCES
A: 75 mm B: 10 mm C: 200 mm
The clearances around the boiler as shown above must be
observed for correct operation.
A minimum of 200mm clearance must be maintained
underneath the boiler to allow replacement of the heating
elements if required. A minimum of 500 mm clearance must
be maintained in front of the boiler to enable easy access for
servicing.
Ensure sufficient space to make all water connections
including the outlet pipes for the heating safety valve which
should be routed to a suitable discharge point.
A Heating FLOW ¾”
B Heating RETURN ¾”
C Safety valve drain
D Electrical connection





  






4.3 Location
The location should be clean and dry with no presence
of gases, explosives or flammable objects.
It is not suitable for installation outside and should be
protected from moisture and frost.
The boiler must be sited so that the boiler and controls
are not accessible to any persons whilst using a bath
or shower and there should be no possibility of water
dripping or splashing onto the boiler or controls.
Electrical safety regulations for clearances must be
followed if installed in a bathroom or shower area.
The boiler has an electric protection rating of IP20/IP2X.
The power supply cable should be carefully routed
and secured and provision made for a suitable isolation
switch and MCB/RCD.
4.4 Dimensions & Connections
4.5 Clearances
The clearances around the boiler as shown above must
be observed for correct operation.
A minimum of 200mm clearance must be maintained
underneath the boiler to allow replacement of the
heating elements if required. A minimum of 500 mm
clearance must be maintained in front of the boiler
to enable easy access for servicing.
Ensure sufficient space to make all water connections
including the outlet pipes for the heating safety valve
which should be routed to a suitable discharge point.
WARNING: Install Upright On A Wall Suitable To Support The Total Weight Of The
Boiler – 50 Kg.
!
5
4.3 LOCATION
WARNING INSTALL UPRIGHT ON A WALL
SUITABLE TO SUPPORT THE TOTAL WEIGHT OF THE
BOILER –40 kg.
The location should be clean and dry with no presence of
gases, explosives or flammable objects.
It is not suitable for installation outside and should be
protected from moisture and frost.
The boiler must be sited so that the boiler and controls are
not accessible to any persons whilst using a bath or shower
and there should be no possibility of water dripping or
splashing onto the boiler or controls.
Electrical safety regulations for clearances must be followed
if installed in a bathroom or shower area.
The boiler has an electric protection rating of IP20/IP2X.
The power supply cable should be carefully routed and
secured and provision made for a suitable isolation switch
and MCB/RCD.
4.4 DIMENSIONS & CONNECTIONS
4.5 CLEARANCES
A: 75 mm B: 10 mm C: 200 mm
The clearances around the boiler as shown above must be
observed for correct operation.
A minimum of 200mm clearance must be maintained
underneath the boiler to allow replacement of the heating
elements if required. A minimum of 500 mm clearance must
be maintained in front of the boiler to enable easy access for
servicing.
Ensure sufficient space to make all water connections
including the outlet pipes for the heating safety valve which
should be routed to a suitable discharge point.
A Heating FLOW ¾”
B Heating RETURN ¾”
C Safety valve drain
D Electrical connection





  







Elnur powered by Gabarrón | MATTIRA | Installation Guide 6
6
4.6 MOUNTING BRACKET
Mark the hole positions using the wall bracket as a template per the diagram.
Fit bracket securely onto wall before lifting appliance into position. Drill the
holes and fit the bracket ensuring it is level using suitable high strength screws,
with appropriate plugs or fixings, minimum M10 size.
HANDLING BEFORE INSTALLATION
The Gabarrón Mattira Boiler must be handled with care and stored the
correct way up in a dry place. Any manual handling/lifting operations will need
to comply with the requirements of the Manual Handling Operations
Regulations issued by the H.S.E.
The appliance can be moved using a sack truck on the rear face although care
should be taken and the route should be even. In apartment buildings
containing a number of storeys we would recommend that the appliances are
moved vertically in a mechanical lift. If it is proposed to use a crane, expert
advice should be obtained regarding the need for slings, lifting beams etc.
Always use assistance if required. Wear suitable cut resistant gloves when
handling the appliance.
Ensure safe lifting techniques are used. Do not lift the appliance by attached pipe-work or components.
When lifting, the boiler ensure that the fixing elements and the wall have a sufficient load-bearing capacity. Check the quality of
the wall.
4.7 WATER CONNECTIONS - GENERAL
CAUTION All connections to the boiler must be carried out respecting the correct flow, return, hot, cold and discharge
indicators that are labelled on the boiler and also shown in this manual.
CAUTION When tightening or loosening threaded connections, always use suitable tools such as open-end spanners. Do
not use pipe wrenches, extensions or unsuitable tools that may cause damage or water leaks.
4.8 (a) CENTRAL HEATING CONNECTIONS, DESIGN & REQUIREMENTS
This boiler is designed for fully pumped sealed systems only.
Treatment of Water Circulating Systems
All recirculatory water systems will be subject to corrosion unless an appropriate water treatment is applied. This means that the
system efficiency will deteriorate as corrosion sludge accumulates within the system. This causes a risk to the pump and valves and
can result in boiler noise and circulation problems. When installing heating systems, flux will be evident in the system which can
lead to damage of boiler and system components.
All systems must be thoroughly drained and flushed out using corrosion inhibitors and cleansing agents/descalers that are compliant
with BS7593 requirements. In all cases, they should be used following the manufacturer’s instructions.
Failure to flush and add an inhibitor to the system will invalidate the manufacturer’s warranty of the boiler.
It is also important that the inhibitor concentration is checked for correctness after installation, modification and during every
service in accordance with the relevant manufacturer’s instructions. Test kits specifically for this purpose are available from
inhibitor stockists.
Heating Flow & Return
These connections are ¾ “for connection to 22mm pipe using the tails provided. Service valves should be installed in the
pipework directly below the boiler with drain-off points above to allow the boiler to be isolated for maintenance without the
need to drain the entire system. The valves should be of sufficiently large bore so not to restrict the heating circulation.
The boiler is not suitable for single pipe heating systems, only a twin-pipe heating system should be used.


4.6 Mounting Bracket
Mark the hole positions using the wall bracket as
a template per the diagram.
Fit bracket securely onto wall before lifting appliance
into position. Drill the holes and fit the bracket ensuring
it is level using suitable high strength screws, with
appropriate plugs or fixings, minimum M10 size.
HANDLING BEFORE INSTALLATION
The Gabarrón Mattira Boiler must be handled with
care and stored the correct way up in a dry place.
Any manual handling/lifting operations will need to
comply with the requirements of the Manual Handling
Operations Regulations issued by the H.S.E.
The appliance can be moved using a sack truck on
the rear face although care should be taken and the
route should be even. In apartment buildings containing
a number of storeys we would recommend that the
appliances are moved vertically in a mechanical lift. If
it is proposed to use a crane, expert advice should be
obtained regarding the need for slings, lifting beams
etc. Always use assistance if required. Wear suitable
cut resistant gloves when handling the appliance.
Ensure safe lifting techniques are used. Do not lift
the appliance by attached pipe-work or components.
When lifting, the boiler ensure that the fixing elements
and the wall have a sufficient load-bearing capacity.
Check the quality of the wall.
4.7 Water Connections - General
4.8 (A) Central Heating Connections,
Design & Requirements
This boiler is designed for fully pumped sealed
systems only.
Treatment of Water Circulating Systems
All recirculatory water systems will be subject to
corrosion unless an appropriate water treatment is
applied. This means that the system efficiency will
deteriorate as corrosion sludge accumulates within
the system. This causes a risk to the pump and valves
and can result in boiler noise and circulation problems.
When installing heating systems, flux will be evident
in the system which can lead to damage of boiler
and system components.
All systems must be thoroughly drained and flushed
out using corrosion inhibitors and cleansing agents/
descalers that are compliant with BS7593 requirements.
In all cases, they should be used following the
manufacturer’s instructions.
Failure to flush and add an inhibitor to the system will
invalidate the manufacturer’s warranty of the boiler.
It is also important that the inhibitor concentration is
checked for correctness after installation, modification
and during every service in accordance with the
relevant manufacturer’s instructions. Test kits
specifically for this purpose are available from
inhibitor stockists.
CAUTION: All connections to the
boiler must be carried out respecting
the correct flow, return, hot, cold
and discharge indicators that are
labelled on the boiler and also shown
in this manual.
!
CAUTION: When tightening or
loosening threaded connections,
always use suitable tools such as
open-end spanners. Do not use pipe
wrenches, extensions or unsuitable
tools that may cause damage or
water leaks.
!

Elnur powered by Gabarrón | MATTIRA | Installation Guide 7
7
Filling loop
It is recommended that a minimum of 2m of 22mm diameter pipework is present to/from the flow and return connections on
the boiler as reduction in size prior to this may result in the system flow rate being below the minimum level required, resulting
in error E3.
Drain Point
As detailed above, drain points should be installed directly above the service valves on the flow and return pipe work to enable
the removal of water from within the boiler for servicing and maintenance, preventing the need to drain the entire system.
A drain point must also be fitted at the lowest point of the system. It is not acceptable to drain the boiler through the safety valve
as debris and deposits will prevent correct operation of the valve.
Heating System By-pass
The heating water flow switch requires a minimum flow rate through the boiler of 7 L/min for correct operation. Systems fitted
with Thermostatic Radiator Valves on every radiator must have a bypass circuit installed.
The bypass circuit must be in 22mm pipe work, is recommended to have at least 2m of continuous pipework and must
incorporate an automatic bypass valve. This is required in order to maintain sufficient flow through the boiler should all of the
valves be closed. (See 7.3 Heating System Flow Switch - E3 Error & System Bypass Requirements).
To alleviate potential flow issues, especially on smaller systems, it is recommended that all installations be fitted with a bypass
circuit as described above.
System Expansion
An integral 6 L expansion vessel provides for expansion of the heated system water under normal conditions however a system
with larger volumes of water may require extra expansion capacity to be provided.
Filling Loop
A SYSTEM filling loop is required for filling of the heating system and replacing water lost during servicing or bleeding and should
be installed close to the boiler. The loop should be as shown in the diagram and comply with current Water Supply Regulations.
The temporary connection should be removed after filling and the valves sealed with suitable caps.
Ensure that all radiators have air release (bleed) valves installed and that high points in pipe work have an air release valve
(automatic type recommended) installed.
Pressure Relief Valve
The pressure relief valve is set at 3 bar, subsequently all fittings and pipework, etc. must be suitable for pressures in excess of 3
bar and temperature in excess of 100ºC.
The pressure relief valve has a ½” BSP thread for connection via a suitable connector to copper tube and the pressure relief
discharge pipe should not be less than 15mm diameter.
The pressure relief discharge pipe must run continuously downward and discharge outside of the building, preferably over a
drain.
The discharge pipe should be routed in such a manner that it does not present a hazard to occupants or cause damage to wiring
or electrical components.
If the discharge pipe does not terminate over a drain then, the end of the pipe should terminate facing down and towards the
wall.
Under no circumstances should the discharge be above a window, entrance or other public access.
The installer must give consideration to the possibility that boiling water / steam could discharge from the pipe.
i
Mains water
supply
Heating
system
valve
valve
Heating Flow & Return
These connections are ¾ “ for connection to 22mm
pipe using the tails provided. Service valves should be
installed in the pipework directly below the boiler with
drain-off points above to allow the boiler to be isolated
for maintenance without the need to drain the entire
system. The valves should be of sufficiently large bore
so not to restrict the heating circulation.
The boiler is not suitable for single pipe heating
systems, only a twin-pipe heating system should
be used.
It is recommended that a minimum of 2m of 22mm
diameter pipework is present to/from the flow and
return connections on the boiler as reduction in size
prior to this may result in the system flow rate being
below the minimum level required, resulting in error E3.
Drain Point
As detailed above, drain points should be installed
directly above the service valves on the flow and return
pipe work to enable the removal of water from within
the boiler for servicing and maintenance, preventing the
need to drain the entire system.
A drain point must also be fitted at the lowest point
of the system. It is not acceptable to drain the boiler
through the safety valve as debris and deposits will
prevent correct operation of the valve.
Heating System By-pass
The heating water flow switch requires a minimum flow
rate through the boiler of 7 L/min for correct operation.
Systems fitted with Thermostatic Radiator Valves on
every radiator must have a bypass circuit installed.
The bypass circuit must be in 22mm pipe work, is
recommended to have at least 2m of continuous
pipework and must incorporate an automatic bypass
valve. This is required in order to maintain sufficient flow
through the boiler should all of the valves be closed.
(See 7.3 Heating System Flow Switch - E3 Error & System
Bypass Requirements).
To alleviate potential flow issues, especially on smaller
systems, it is recommended that all installations be
fitted with a bypass circuit as described above.
System Expansion
An integral 6 L expansion vessel provides for expansion
of the heated system water under normal conditions
however a system with larger volumes of water may
require extra expansion capacity to be provided.
Filling Loop
A SYSTEM filling loop is required for filling of the heating
system and replacing water lost during servicing or
bleeding and should be installed close to the boiler.
The loop should be as shown in the diagram and
comply with current Water Supply Regulations.
The temporary connection should be removed after
filling and the valves sealed with suitable caps.
Pressure Relief Valve
The pressure relief valve is set at 3 bar, subsequently all
fittings and pipework, etc. must be suitable for pressures
in excess of 3 bar and temperature in excess of 100ºC.
The pressure relief valve has a ½” BSP thread for
connection via a suitable connector to copper tube
and the pressure relief discharge pipe should not be
less than 15mm diameter.
The pressure relief discharge pipe must run continuously
downward and discharge outside of the building,
preferably over a drain.
The discharge pipe should be routed in such a manner
that it does not present a hazard to occupants or cause
damage to wiring or electrical components.
If the discharge pipe does not terminate over a drain
then, the end of the pipe should terminate facing down
and towards the wall.
Under no circumstances should the discharge be above
a window, entrance or other public access.
The installer must give consideration to the possibility
that boiling water / steam could discharge from the pipe.
If the discharge pipe is to join a common discharge pipe,
it must have its own tundish and increase to 22mm
diameter. prior to connection to the common
discharge pipe.
If the discharge is to join into the common discharge
from an unvented cylinder then, it must follow the
guidance of G3 of the Building Regulations.
All installations must be fitted in accordance with
all local regulations in force at that time. Failure to
comply with these regulations will invalidate the
manufacturers’ warranty.
Ensure that all radiators have air
release (bleed) valves installed and
that high points in pipe work have
an air release valve (automatic type
recommended) installed.
!

Elnur powered by Gabarrón | MATTIRA | Installation Guide 8
4.8 (B) Pump Duty
Boiler equipped with a high efficiency circulation pump,
with a maximum delivery head of 6.2 m and a maximum
flow of 3.3 m³/h.
There are selectable operation modes with the built-in
knob. You can select constant operating speeds I,
II and III.
A LED indicator informs about the operating status
of the pump.
- Green: correct operation.
- Green / red flashing: Lower voltage U<180V;
overvoltage U>253V; Module overheating
- Red flashing: pump blocked.
4.9 Electrical Connections
Connection to Mains Supply
The GABARRÓN MATTIRA SYSTEM MAC15 boilers must
be installed in premises having a system impedance
of not more than 0.25 + j0.25Ω.
The GABARRÓN MATTIRA SYSTEM MAC15 boilers comply
with the technical requirements of BS EN 61000-3-3.
The GABARRÓN MATTIRA SYSTEM MAC15 boilers must be
installed in premises having a service capacity ≥100 A
per phase.
Complete all the pipe-work before connecting the boiler
to the electricity supply.
Any re-installation must be performed by qualified
electricians.
Ensure that the mains voltage available coincides with
that shown on the rating label.
WARNING: Important: Check that the total power supply to the building has sufficient
load capacity to supply the boiler at the heat output required in addition to all other
appliances that may be supplied.
!
WARNING: The supply cable to the boiler should be of sufficient size to carry the
load capacity required. It should be wired through a linked isolator switch with
minimum contact gaps of 3mm in every pole and protected by a suitably rated
circuit breaker Mcb/Rcd
Install the necessary electrical protections as Indicated In the current regulations.
in the event of these regulations not being complied with, the manufacturer will
not be liable for any bodily injury or material damage that may occur.
!
WARNING: It is essential that the boiler Is properly earthed and the wiring tested to
current Iee regulations.
!
Electrical Supply Sizing
The following table shows the specification for a boiler
installed on single phase supply.
Rated output of
boiler 4kW 5kW 6kW 7kW 8kW 9kW 10kW 11kW 12kW 13kW 15kW
Supply current 17.4A 21.7A 26.1A 30.4A 34.8A 39.1A 43.5A 47.8A 52.2A 56.5A 65.2A
MCB / RCD rating 20A 25A 32A 32A 40A 50A 50A 50A 63A 63A 80A
Minimum
cable size 2.5mm 4mm 4mm 6mm 6mm 10mm 10mm 10mm 16mm 16mm 16mm

Elnur powered by Gabarrón | MATTIRA | Installation Guide 9
Connection to Boiler
Before establishing a mains connection switch off the power supply. Secure the power supply against being
switched on again. Mains connection terminals remain live even if the on/off switch is turned off.
The boiler is delivered ready for operation on 3x400V three phase supply. For operation on 230V single phase
the supplied links must be connected across the terminals of the connection block as shown.
WARNING: Touching live connections can cause serious personal injury.
!
9
Connection to Boiler
WARNING Touching live connections can cause serious personal injury.
Before establishing a mains connection switch off the power supply. Secure the power supply against being switched on again.
Mains connection terminals remain live even if the on/off switch is turned off.
The boiler is delivered ready for operation on 3x400V three phase supply. For operation on 230V single phase the supplied links
must be connected across the terminals of the connection block as shown.
The terminal connection block is located mid-way up at the front left hand side of the boiler and is accessed after removing the
boiler front panel . The supply cable should be routed to this point through the cable entry point on the left hand bottom of the
boiler.
CAUTION: A mains voltage at the incorrect plug terminal can destroy the electronics.
Make sure the connecting cables are securely fastened to the plug terminals.
Wiring External Controls
It is recommended that the boiler is controlled by an external control such as a time clock or room thermostat or a combined
programmable room thermostat such as the Elnur model CTP-10.
CAUTION: The switching connection of this control should be VOLT FREE and connected to the terminals indicated
‘TA’ on the PCB. The factory fitted link across these terminals must be removed.
The boiler’s automatic power modulation feature is ONLY activated by the initial interruption of this switching link.
i
Three phase and single phase connection
The terminal connection block is located mid-way up at the front left hand side of the boiler and is accessed after
removing the boiler front panel . The supply cable should be routed to this point through the cable entry point on
the left hand bottom of the boiler.
CAUTION: A mains voltage at the incorrect plug terminal can destroy the electronics.
Make sure the connecting cables are securely fastened to the plug terminals.
!
Wiring External Controls
It is recommended that the boiler is controlled by an external control such as a time clock or room thermostat
or a combined programmable room thermostat such as the Elnur model CTP-10.
!
CAUTION: The switching connection of this control should be VOLT FREE and connected
to the terminals indicated ‘TA’ on the PCB. The factory fitted link across these terminals
must be removed.
The boiler’s automatic power modulation feature is ONLY activated by the initial interruption of this switching link.

Elnur powered by Gabarrón | MATTIRA | Installation Guide 10
5 COMMISSIONING
5.1 Installation Parameters
These parameters must be adjusted by the installer
to match the requirements of the installation.
To access to installation parameters menu:
- Ensure the rear mounted power on/off switch
is turned on.
- Ensure the main display front panel is turned off
by using the button.
- Press and hold the and buttons together
for at least 5 seconds.
To move forward or backward through the menu
use the and buttons respectively.
To modify a parameter:
- Select the appropriate value e.g. – P00, P01, P02, etc.
- Press the button to display the current setting.
- Modify the setting as required using the and
buttons respectively.
- To confirm the new setting, press the button
once.
After setting the various parameters it is necessary
to validate by pressing the button for 3 seconds.
Note - If this is not done after completing changes,
none of the changes made will be saved.
IMPORTANT - If none of the buttons
are pressed for 30 seconds, the
installation parameter menu will
be automatically closed without
validating/saving any changes.
!
Underfloor heating. If the boiler is
underfloor heating ready this parameter
will be 1 otherwise it will be 0.
Outdoor temperature probe. An outdoor
temperature probe (not provided) can be
installed. In this case the parameter value
will be 1.
Heating temperature differential. The
heating temperature differential can be
selected from 2ºC to 10ºC. The default
value is 2ºC.
Modulation.
1 (modulation ON) 0 (modulation OFF).
Units.
ºC (Celsius) ºF (Fahrenheit).
To access the parameters menu from P11 – P15, an
outdoor temperature probe must be installed and the
parameter in P05 set to 1
AUTO heating regulation. If a fan outdoor
temperature probe is installed it is possible
to activate the auto heating regulation by
shifting this parameter value to 1.
TIMAX. Maximum water flow temperature
in AUTO heating mode.
TIMIN. Minimum water flow temperature
in AUTO heating mode.
TEMAX. Outdoor temperature from which
the water flow temperature will be TIMIN.
TEMIN. Outdoor temperature below which
the water flow temperature will be TIMAX.
Boiler type. If the boiler is for central
heating and Domestic Hot Water (DHW) this
parameter is 1. If the boiler is only for central
heating it will be 0.
Model. 18 corresponds to model MAS18,
15 corresponds to model MAS15.
Boiler maximum output limit.
Model MAS18 can be limited to 18 - 15 - 12 -
9 - 6 - 3 kW.
Model MAS15 can be limited to 15 - 13 - 12 -
11 - 10 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 kW.

Elnur powered by Gabarrón | MATTIRA | Installation Guide 11
5.2 Limiting Boiler Maximum Output
The boiler is supplied for operation on maximum heat output of 15kW. The output can be rated below this maximum
to match the heat load required. This rating is done by means of P03 parameter. See above “5.1 INSTALLATION
PARAMETERS”
The boiler will not exceed this pre-set maximum but will still modulate in heating mode up to this level, adapting
to demand and ensuring economic operation.
Correct configuration for the selected output can be checked on the boiler display panel following the procedure
shown in “7.4 CHECKING RATED HEAT OUTPUT”.
Limitation of output on models Mattira System Mas18 (Not available Uk & Ireland)
WARNING: On installations where the incoming power supply is not capable of
maximum load the boiler control must be re-configured to limit the output before
switching on.
!
CAUTION: It is essential to confirm the power output with the use of a clamp meter.
!
Maximum output
limited to:
MAXIMUM
CURRENT L1
MAXIMUM
CURRENT L2
MAXIMUM
CURRENT L3
Maximum output
limited to:
MAXIMUM
CURRENT
18kW 26.0A 26.0A 26.0A 18kW* 78.3A*
15kW 26.0A 26.0A 13.0A 15kW* 65.2A*
12kW 26.0A 13.0A 13.0A 12kW 52.2A
9kW 13.0A 13.0A 13.0A 9kW 39.1A
6kW 13.0A 13.0A - 6kW 26.1A
3kW 13.0A - - 3kW 13.0A
Connection Three-Phase 3x400v~+N Connection Single Phase 230v~
Maximum output
limited to:
MAXIMUM
CURRENT L1
MAXIMUM
CURRENT L2
MAXIMUM
CURRENT L3
Maximum output
limited to:
MAXIMUM
CURRENT
15kW 21.7A 21.7A 26.0A 15kW* 65.2A*
13kW 21.7A 21.7A 13.0A 13kW 56.5A*
12kW 8.7A 21.7A 21.7A 12kW 52.2A
11kW 21.7A 13.0A 13.0A 11kW 47.8A
10kW 13.0A 8.7A 21.7A 10kW 43.5A
9kW 13.0A 13.0A 13.0A 9kW 39.1A
8kW 13.0A 8.7A 13.0A 8kW 34.8A
7kW 8.7A 13.0A 8.7A 7kW 30.4A
6kW 8.7A 8.7A 8.7A 6kW 26.1A
5kW 8.7A 13.0A - 5kW 21.7A
4kW - 8.7A 8.7A 4kW 17.4A
3kW 13.0A - - 3kW 13.0A
2kW - - 8.7A 2kW 8.7A
Connection Three-Phase 3x400v~+N Connection Single Phase 230v~
Limitation of Output on models Mattira System Mas15
* The standard configuration of the boiler only allows a maximum of 12kW when connected SINGLE-PHASE 230V~.

Elnur powered by Gabarrón | MATTIRA | Installation Guide 12
5.3 Heating System Flushing
The heating system should be flushed in accordance
with BS7593 & BS5449 which will remove any debris
or contaminants detrimental to the operation and life
of the boiler. Any cleanser or additives used should
comply with current standards and the manufacturer’s
instructions carefully followed.
Note: It Is Important Not To Use The Boiler Pressure Relief
Valve To Drain Or Flush The System As Trapped Debris
Will Cause Incorrect Operation. A Purpose Provided
Drain Point Should Be Used.
5.4 Heating System Initial Filling
Ensure both flow and return isolation valves are open.
Identify the boiler automatic air release valve at the top
right hand side of boiler and loosen the cap. Close any
manual air vents fitted on the system.
Be careful not to splash any of the electrical components.
Connect the filling loop and fill slowly until the pressure
gauge indicates between 1 and 1.5 bar.
Proceed to vent all the manual release valves until all air
is purged from the system. It will be necessary to top-up
through the filling loop during this operation until the
pressure gauge indicates between 1 and 1.5 bar.
5.5 Pump Checking & Venting
Sometimes (i.e. if display fault E3) it is necessary
to check that the pump is properly vented and
spinning freely.
To purge the pump, turn on the boiler and with the
pump selector, alternate between positions III and Min
every fifteen seconds. Keep this operation for 5 minutes.
If excess air remains in the system or there is insufficient
pressure or flow rate the boiler will fail to operate and
display fault E3.
An LED indicator informs about the operating status
of the pump:
- Green: correct operation.
- Green / red flashing: Lower voltage U<180V;
overvoltage U>253V; Module overheating
- Red flashing: pump blocked.
5.6 Pump Anti-Seize Function
The advanced boiler control will automatically energise
the pump for 10 seconds each month to protect it from
seizing during long periods of inactivity. The power
supply must be maintained for this function to operate.
5.7 More Installation Data
It is possible to display more installation data by
pressing for a few seconds and then
or .
CAUTION: Flush the heating
installation thoroughly prior to
installation.
!
Heating return temperature.
Maximum output limitation in kW.
Modulated output in kW.
Outdoors temperature. (Only if the sensor
is connected and P005 is activated).

Elnur powered by Gabarrón | MATTIRA | Installation Guide 13
6 OPERATING THE BOILER
6.1 Initial Switching On
CAUTION: The maximum heat output must be adjusted before switching on. The boiler
should never be switched on with the heating system tank empty. Damage could occur.
!
When the boiler is first connected, it will perform a general self-check and if a fault is
detected it will be indicated on the display.
!
13
6 OPERATING THE BOILER
6.1 INITIAL SWITCHING ON
CAUTION: THE MAXIMUM HEAT OUTPUT MUST BE ADJUSTED BEFORE SWITCHING ON. THE BOILER
SHOULD NEVER BE SWITCHED ON WITH THE HEATING SYSTEM TANK EMPTY. DAMAGE COULD
OCCUR.
When the boiler is first connected, it will perform a general self-check and if a fault is detected it will be indicated on the
display.
Turn on the boiler with the on/off switch located at the back of the
boiler as shown.
CAUTION: MAINS CONNECTION TERMINALS REMAIN
LIVE EVEN IF THE ON/OFF SWITCH IS TURNED OFF.
6.2 CONTROL PANEL DESCRIPTION
MATTIRA SYSTEM “MAS”
Push the button to start the boiler up. The same button will turn the boiler off when pushed again.
If the heating function is not selected the screen will not display a value but just a red dot.
i
Increases
heating water
temperature
Heating water
temp. and other
messages
Keyboard power ON/ OFF
block ON/OFF
Block / Unblock
Power ON/OFF
heating key
Red dot shows
heating elements
on duty
Decreases
heating water
temperature
Turn on the boiler with the on/off switch located at the
back of the boiler as shown.
CAUTION: Mains connection terminals remain live even if the on/off switch Is
turned off.
!
6.2 Control Panel Description
MATTIRA SYSTEM “MAS”
13
6 OPERATING THE BOILER
6.1 INITIAL SWITCHING ON
CAUTION: THE MAXIMUM HEAT OUTPUT MUST BE ADJUSTED BEFORE SWITCHING ON. THE BOILER
SHOULD NEVER BE SWITCHED ON WITH THE HEATING SYSTEM TANK EMPTY. DAMAGE COULD
OCCUR.
When the boiler is first connected, it will perform a general self-check and if a fault is detected it will be indicated on the
display.
Turn on the boiler with the on/off switch located at the back of the
boiler as shown.
CAUTION: MAINS CONNECTION TERMINALS REMAIN
LIVE EVEN IF THE ON/OFF SWITCH IS TURNED OFF.
6.2 CONTROL PANEL DESCRIPTION
MATTIRA SYSTEM “MAS”
Push the button to start the boiler up. The same button will turn the boiler off when pushed again.
If the heating function is not selected the screen will not display a value but just a red dot.
i
Increases
heating water
temperature
Heating water
temp. and other
messages
Keyboard power ON/ OFF
block ON/OFF
Block / Unblock
Power ON/OFF
heating key
Red dot shows
heating elements
on duty
Decreases
heating water
temperature
Push the button to start the boiler up. The same button will turn the boiler off when pushed again.
If the heating function is not selected the screen will not display a value but just a red dot.
13
6 OPERATING THE BOILER
6.1 INITIAL SWITCHING ON
CAUTION: THE MAXIMUM HEAT OUTPUT MUST BE ADJUSTED BEFORE SWITCHING ON. THE BOILER
SHOULD NEVER BE SWITCHED ON WITH THE HEATING SYSTEM TANK EMPTY. DAMAGE COULD
OCCUR.
When the boiler is first connected, it will perform a general self-check and if a fault is detected it will be indicated on the
display.
Turn on the boiler with the on/off switch located at the back of the
boiler as shown.
CAUTION: MAINS CONNECTION TERMINALS REMAIN
LIVE EVEN IF THE ON/OFF SWITCH IS TURNED OFF.
6.2 CONTROL PANEL DESCRIPTION
MATTIRA SYSTEM “MAS”
Push the button to start the boiler up. The same button will turn the boiler off when pushed again.
If the heating function is not selected the screen will not display a value but just a red dot.
i
Increases
heating water
temperature
Heating water
temp. and other
messages
Keyboard power ON/ OFF
block ON/OFF
Block / Unblock
Power ON/OFF
heating key
Red dot shows
heating elements
on duty
Decreases
heating water
temperature

Elnur powered by Gabarrón | MATTIRA | Installation Guide 14
6.3 Central Heating Operation
First ensure that any external controls such as room thermostat or time clock are demanding heat.
To select the heating function, push the button. Pushing again will switch the function off
and return display to just a red dot.
When the heating mode is selected, the display will show the temperature of the heating water.
We can modify the setting of the temperature of the water by pushing either the button
or the button and using the same buttons to adjust the value that flashes on the display.
The modified setting will be stored after a few seconds or instantly by pushing the button.
The heating setting can be varied between 8ºC and 85°C. The symbol H appears after the 85 value
or before the 8 value. If this value is selected, the heating will function in anti-freeze mode.
If the setting is higher than the actual temperature of the heating water, the heating will
connect and a small red indicator of the consumption of heating resistances will light up.
6.4 Anti-Freeze Mode (Frost Protection)
It is possible to select an anti-freeze mode for frost protection during periods of inactivity. The power supply to
the boiler must be maintained.
By attempting to set a central heating temperature below the 8ºC value or above the 85ºC value the symbol H
will appear on the display. By selecting this value the heating will only work in anti-freeze mode i.e. if the boiler
temperature falls to 7ºC the heating will activate automatically.
6.5 User Parameters
The user can change a number of parameters to set some functions of the boiler to the needs of each customer.
To access the user parameters menu – with front display OFF, press and hold the and buttons for at least
5 sec. To move forward or backward through the menu use the and buttons respectively.
To modify a parameter, press the button and the current value will be displayed. It can be modified with
the and buttons. Press the button to validate.
14
6.3 CENTRAL HEATING OPERATION
First ensure that any external controls such as room thermostat or time clock are demanding heat.
To select the heating function, push the button. Pushing again will switch the function
off and return display to just a red dot.
When the heating mode is selected, the display will show the temperature of the heating
water.
We can modify the setting of the temperature of the water by pushing either the button or the button and using the
same buttons to adjust the value that flashes on the display.
The modified setting will be stored after a few seconds or instantly by pushing the button.
The heating setting can be varied between 8ºC and 85°C. The symbol H appears after the 85 value or before the 8 value. If this
value is selected, the heating will function in anti-freeze mode.
If the setting is higher than the actual temperature of the heating water, the heating will
connect and a small red indicator of the consumption of heating resistances will light up.
6.4 ANTI-FREEZE MODE (Frost Protection)
It is possible to select an anti-freeze mode for frost protection during periods of inactivity. The power supply to the boiler must
be maintained.
By attempting to set a central heating temperature below the 8ºC value or above the 85ºC value the symbol H will appear on the
display. By selecting this value the heating will only work in anti-freeze mode i.e. if the boiler temperature falls to 7ºC the heating
will activate automatically.
6.5 USER PARAMETERS
The user can change a number of parameters to set some functions of the boiler to the needs of each customer.
To access the user parameters menu –with front display OFF, press and hold the and buttons for at least 5 sec.
To move forward or backward through the menu use the and buttons respectively.
To modify a parameter, press the button and the current value will be displayed. It can be modified with the and
buttons. Press the button to validate
Modulation. 1 (modulation ON)
0 (modulation OFF).
Units. ºC (Celsius)
ºF (Fahrenheit).
AUTO heating regulation. If a fan outdoor temperature probe is installed it is possible to activate the auto
heating regulation by shifting this parameter value to 1.
TIMAX. Maximum water flow temperature in AUTO heating mode.
TIMIN. Minimum water flow temperature in AUTO heating mode.
TEMAX. Outdoor temperature from which the water flow temperature will be TIMIN.
TEMIN. Outdoor temperature below which the water flow temperature will be TIMAX.
14
6.3 CENTRAL HEATING OPERATION
First ensure that any external controls such as room thermostat or time clock are demanding heat.
To select the heating function, push the button. Pushing again will switch the function
off and return display to just a red dot.
When the heating mode is selected, the display will show the temperature of the heating
water.
We can modify the setting of the temperature of the water by pushing either the button or the button and using the
same buttons to adjust the value that flashes on the display.
The modified setting will be stored after a few seconds or instantly by pushing the button.
The heating setting can be varied between 8ºC and 85°C. The symbol H appears after the 85 value or before the 8 value. If this
value is selected, the heating will function in anti-freeze mode.
If the setting is higher than the actual temperature of the heating water, the heating will
connect and a small red indicator of the consumption of heating resistances will light up.
6.4 ANTI-FREEZE MODE (Frost Protection)
It is possible to select an anti-freeze mode for frost protection during periods of inactivity. The power supply to the boiler must
be maintained.
By attempting to set a central heating temperature below the 8ºC value or above the 85ºC value the symbol H will appear on the
display. By selecting this value the heating will only work in anti-freeze mode i.e. if the boiler temperature falls to 7ºC the heating
will activate automatically.
6.5 USER PARAMETERS
The user can change a number of parameters to set some functions of the boiler to the needs of each customer.
To access the user parameters menu –with front display OFF, press and hold the and buttons for at least 5 sec.
To move forward or backward through the menu use the and buttons respectively.
To modify a parameter, press the button and the current value will be displayed. It can be modified with the and
buttons. Press the button to validate
Modulation. 1 (modulation ON)
0 (modulation OFF).
Units. ºC (Celsius)
ºF (Fahrenheit).
AUTO heating regulation. If a fan outdoor temperature probe is installed it is possible to activate the auto
heating regulation by shifting this parameter value to 1.
TIMAX. Maximum water flow temperature in AUTO heating mode.
TIMIN. Minimum water flow temperature in AUTO heating mode.
TEMAX. Outdoor temperature from which the water flow temperature will be TIMIN.
TEMIN. Outdoor temperature below which the water flow temperature will be TIMAX.
Modulation. 1 (modulation ON)
0 (modulation OFF).
Units. ºC (Celsius)
ºF (Fahrenheit).
AUTO heating regulation. If a fan outdoor temperature probe is installed it is possible to activate
the auto heating regulation by shifting this parameter value to 1.
TIMAX. Maximum water flow temperature in AUTO heating mode.
TIMIN. Minimum water flow temperature in AUTO heating mode.
TEMAX. Outdoor temperature from which the water flow temperature will be TIMIN.
TEMIN. Outdoor temperature below which the water flow temperature will be TIMAX.

Elnur powered by Gabarrón | MATTIRA | Installation Guide 15
6.6 Heating Modulation Feature
The advanced control board on the boiler will
automatically modulate the heating output to the
demand required to save energy. This function works
by the boiler ‘learning’ and anticipating the time
taken to reach the temperature level demanded by
the external thermostatic control. The power output
is automatically adjusted therefore reducing power
consumption on warmer days or when another heat
source is present.
An external ‘volt free’ control must be fitted across
the terminals marked ‘TA’ on the PCB and the ‘bridge’
removed for this function to be activated.
This feature can be disabled using parameter P11.
See “6.5 USER PARAMETERS”.
6.7 Auto Heating Regulation
It is possible to regulate the temperature at which the
boiler drives the water heating circuit depending on
the outdoors temperature. This method of regulation
provides maximum comfort as it anticipates changes
in the thermal needs of the house. The room thermostat
continues to regulate the temperature inside the house.
To activate this mode of heating, the installer will
need to connect an external temperature sensor
(not supplied) and activate the P05 and P11
parameters.
There are four parameters that define this function.
TIMAX. Maximum water flow temperature in AUTO
heating mode.
In the above example TIMAX=80ºC.
TIMIN. Minimum water flow temperature in AUTO
heating mode.
In the above example TIMIN=20ºC.
TEMAX. Outdoor temperature from which the water
flow temperature will be TIMIN. In the above
example TEMAX=15ºC.
TEMIN. Outdoor temperature below which the water
flow temperature will be TIMAX. In the above
example TEMIN=2ºC.
On the coldest days, the water will be driven at higher
temperatures and vice versa on the hottest days-less
water will be driven at a lower temperature. In the
example, we see how, if the outdoors temperature is
of 5ºC the water flow temperature heating circuit
would be about 66 °C.
You can temporarily override the automatically
calculated set point. If, for example, you want to use
the boiler to the maximum for a few hours even when
automatic control mode, you would proceed as follows:
When pressing the or button, the display will
alternatively show the calculated set point and
the indication
By holding down either of these two keys
for at least 5 seconds, the calculated set
point will start flashing and the set point
can now be modified with the same keys.
Validate the selection by pressing the
button. The time that the set point
is going to be overridden is shown:
It can be modified from 1 to 24h. Validate the
selection by pressing the button. The
override set point and the time remaining
are displayed alternatively every 10 seconds.
At any time, it is possible to cancel this state
just by turning off and restarting the boiler.
6.8 Blocking the Controls
It is possible to lock the buttons of the control panel
to prevent any adjustment. By keeping the button
pressed down for a few seconds, the control panel
will be locked.
The control buttons of the boiler will be locked and
no button will respond when pressed. Internally all
the settings remain the same and the boiler will
function normally.
To unlock the buttons, press the same button down for
a few seconds until the above displayed symbol goes
off. If the boiler is disconnected from the mains or there
is a failure in the house’s electricity supply, the buttons
will also be unlocked.
15
6.6 HEATING MODULATION FEATURE
The advanced control board on the boiler will automatically modulate the heating output to the demand required to save energy.
This function works by the boiler ‘learning’ and anticipating the time taken to reach the temperature level demanded by the
external thermostatic control. The power output is automatically adjusted therefore reducing power consumption on warmer
days or when another heat source is present.
An external ‘volt free’ control must be fitted across the terminals marked ‘TA’ on the PCB and the ‘bridge’ removed for this
function to be activated.
This feature can be disabled using parameter P11. See “6.5 USER PARAMETERS”.
6.7 AUTO HEATING REGULATION
It is possible to regulate the temperature at which the boiler drives the water heating circuit depending on the outdoors
temperature. This method of regulation provides maximum comfort as it anticipates changes in the thermal needs of the house.
The room thermostat continues to regulate the temperature inside the house.
To activate this mode of heating, the installer will need to connect an external temperature sensor (not supplied) and activate the
P05 and P11 parameters.
There are four parameters that define this function.
TIMAX. Maximum water flow temperature in AUTO heating mode.
In the above example TIMAX=80ºC.
TIMIN. Minimum water flow temperature in AUTO heating mode.
In the above example TIMIN=20ºC.
TEMAX. Outdoor temperature from which the water flow temperature will be TIMIN.
In the above example TEMAX=15ºC.
TEMIN. Outdoor temperature below which the water flow temperature will be TIMAX.
In the above example TEMIN=2ºC.
On the coldest days, the water will be driven at higher temperatures and vice versa on the hottest days-less water will be driven
at a lower temperature. In the example, we see how, if the outdoors temperature is of 5ºC the water flow temperature heating
circuit would be about 66 °C.
You can temporarily override the automatically calculated set point. If, for example, you want to use the boiler to the maximum
for a few hours even when automatic control mode, you would proceed as follows:
      













 


16
When pressing the or button, the display will alternatively show the calculated set point and the indication
. By holding down either of these two keys for at least 5 seconds, the calculated set point will start flashing and the set
point can now be modified with the same keys. Validate the selection by pressing the button. The time that the set point is
going to be overridden is shown: . It can be modified from 1 to 24h. Validate the selection by pressing the
button. The override set point and the time remaining are displayed alternatively every 10 seconds.
At any time, it is possible to cancel this state just by turning off and restarting the boiler.
6.8 BLOCKING THE CONTROLS
It is possible to lock the buttons of the control panel to prevent any adjustment.
By keeping the button pressed down for a few seconds, the control panel will be locked.
The control buttons of the boiler will be locked and no button will respond when pressed. Internally all the settings remain the
same and the boiler will function normally.
To unlock the buttons, press the same button down for a few seconds until
the above displayed symbol goes off. If the boiler is disconnected from the
mains or there is a failure in the house’s electricity supply, the buttons will
also be unlocked.

Elnur powered by Gabarrón | MATTIRA | Installation Guide 16
Problem Possible cause Solution
Boiler will not start.
No power to boiler. Check incoming power supply.
No power. Check boiler control switch is on.
(See Section 6.1).
Heating overheat. Switch tripped. Locate switch and reset.
(See Section 7.2).
Fault E1 displayed.
Heating flow temperature sensor.
Heating water out temperature
probe defective. Contact Technical Service.
Fault E2 displayed.
Heating return temperature sensor.
Heating water return temperature
probe defective. Contact Technical Service .
3kW. Low heating system pressure. Check for leaks.
Refill heating system to 1.5 bar.
Fault E3 displayed.
Heating system water flow switch.
Pump not turning. Check rotating freely (sect 5.5)
Replace pump if necessary.
Air in system.
Purge thoroughly.
Check automatic air valve open.
Vent pump (sect 5.5).
System resistance too high
or blockage.
Check pump speed 3. Check pump
duty (sect 4.9b) Open all radiator
valves. Install system by-pass.
Fault E8 displayed Outdoor.
temperature sensor.
Defective outdoor temperature
sensor or not present.
This sensor is optional. Check
connections. Replace sensor
if necessary. Check parameter
settings correct (sect 5.1).
Heating system water discharging
from 3 bar safety valve. Excessive heating system pressure.
Check filling loop has not been left
connected and is not “letting water
pass”. Disconnect filling loop hose.
Check expansion vessel is charged
to correct level with air.
Check system expansion volume.
The buttons do not respond. Control panel blocked. See Section
6.8 BLOCKING THE CONTROLS.
Low heating temperature.
Settings too low. Check temperature & output
selected.
Failure of heating elements. Check and replace.
Heat requirements miscalculated. Re-calculate & configure.
If the suggested action fails to resolve a problem, please contact ELNUR technical service for further advice.
7 TROUBLESHOOTING
7.1 Possible Faults & Solutions

Elnur powered by Gabarrón | MATTIRA | Installation Guide 17
7.2 Overheat Lock-Out & Re-Setting
Central heating overheat.
If the boiler detects a overheat condition of 100ºC
(80ºC if adapted floor heating) in the central heating
circuit a safety thermal limit switch will operate and
switch the boiler off disabling all functions. The cause
of the overheat should be investigated.
The safety limit switch is on the right underside of the
boiler and will require re-setting manually by following
the procedure shown:
Unscrew & remove the black cap and push the small
pin behind it until you hear a click. The limiter will not
re-set until the temperature in the heating header
drops below 100°C or 80°C if the boiler is adapted
for radiant floor heating.
7.3 Heating System Flow Switch –
E3 Error & System By-Pass Requirements
If the error E3 appears on the display, the flow switch
has detected insufficient water flow in the heating
circuit and heat production is disabled to protect
the boiler from overheating.
The possible causes for this condition are:
- Insufficient water pressure in the heating system
requiring re-filling to 1.5bar
- Pump not circulating or seized. Check as shown
(Sect 5.3)
- Blockage in heating circuit from debris or a foreign
object in the boiler or pipe-work.
- Insufficient flow rate caused by restrictions such
as insufficient size pipe-work, too many bends
or isolation valves with restricted bore.
- Closed radiator valves (Thermostatic). In this
situation, it is essential the required minimum flow
rate of 7 L/min is maintained through the boiler
during all conditions. It may be sufficient to maintain
one radiator with permanently open valves however
the guidance under current Building Regulations
relating to the conservation of energy recommends
the fitting of an automatic by-pass valve. This type
of valve modulates open when necessary to ensure
that the appropriate minimum flow rate is maintained
through the boiler, at all other times it is closed
thus preventing unnecessary and wasteful
circulation through the bypass and the boiler.
7.4 Checking Rated Heat Output
Press the button for three seconds.
The heating display will show
followed by the temperature value of the return probe
of the heating circuit.
On pushing button, the display will show
followed by the value of the limited maximum
output according to the tables (see 5.1).
On pushing button again, the display will show
followed by the actual modulated output
power at that moment.
18
7.2 OVERHEAT LOCK-OUT & RE-SETTING
Central heating overheat.
If the boiler detects a overheat condition of 100ºC (80ºC if adapted
floor heating) in the central heating circuit a safety thermal limit
switch will operate and switch the boiler off disabling all functions.
The cause of the overheat should be investigated.
The safety limit switch is on the right underside of the boiler and will
require re-setting manually by following the procedure shown:
Unscrew & remove the black cap and push the small pin behind it
until you hear a click. The limiter will not re-set until the
temperature in the heating header drops below 100°C or 80°C if the
boiler is adapted for radiant floor heating.
7.3 HEATING SYSTEM FLOW SWITCH –E3 ERROR & SYSTEM BY-PASS REQUIREMENTS
If the error E3 appears on the display, the flow switch has detected insufficient water flow in the heating circuit and heat
production is disabled to protect the boiler from overheating.
The possible causes for this condition are:
- Insufficient water pressure in the heating system requiring re-filling to 1.5bar
- Pump not circulating or seized. Check as shown (Sect 5.3)
- Blockage in heating circuit from debris or a foreign object in the boiler or pipe-work.
- Insufficient flow rate caused by restrictions such as insufficient size pipe-work, too many bends or isolation valves with
restricted bore.
- Closed radiator valves (Thermostatic). In this situation, it is essential the required minimum flow rate of 7 L/min is maintained
through the boiler during all conditions. It may be sufficient to maintain one radiator with permanently open valves however the
guidance under current Building Regulations relating to the conservation of energy recommends the fitting of an automatic by-
pass valve. This type of valve modulates open when necessary to ensure that the appropriate minimum flow rate is maintained
through the boiler, at all other times it is closed thus preventing unnecessary and wasteful circulation through the bypass and
the boiler.
7.4 CHECKING RATED HEAT OUTPUT
It is possible to check the actual heat power output configuration that is set on the boiler and also the modulated operating
output at that moment.
Press the button for three seconds.
The heating display will show followed by the temperature value of the return probe of the heating circuit.
On pushing button, the display will show followed by the value of the limited maximum output according to
the tables (see 5.1).
On pushing button again, the display will show followed by the actual modulated output power at that
moment.
i
It is possible to check the actual
heat power output configuration
that is set on the boiler and also
the modulated operating output at
that moment.
!
5r

Elnur powered by Gabarrón | MATTIRA | Installation Guide 18
8 MAIN COMPONENTS LIST
Heating expansion vessel 6L ref. 60091510
Insulated heating header tank ref. 60101700
Circulation pump RKC130 ref. 60190076
Heating PCB ref. 60105590
Power PCB MAC with support ref. 60105595
Temperature sensor white ref. 60105600
Temperature sensor black ref. 60105605
15 kW heating resistance & joint 140 ref. 60100750
¾” heating flow detector ref. 60100805
0-4 bar pressure gauge ref. 60100820
100°C thermal limiter ref. 60101860
Automatic purge ref. 60091280
3 bar central heating relief valve ref. 60100845
½” filling / shut off valve ref. 60091160
Adhesive controls cover 140x50 ref. 60100508
Keyboard MAS ref. 60105550
9 MAINTENANCE & CARE
Gabarrón MATTIRA electric SYSTEM boilers will require
an annual maintenance check to ensure preservation
of the manufacturer’s warranty and a prolonged and
trouble-free life. A full check list and service log is
located at the back of this manual which, should be
adhered to. The following points below should also
be constantly observed:
- Check and maintain the heating system pressure
between 1 & 1.5 bar when cold. Frequent re-filling
of the system could cause scaling and corrosion
and should be avoided. Regular pressure loss could
indicate a leak and should be investigated promptly.
- Keep the ventilation openings on the boiler clear
to ensure correct operation and protect from
overheating. Do not place or store objects on
the boiler.
- Protect against freezing by ensuring power is
maintained to the boiler at all times, unless the water
supply is interrupted or the heating system is empty.
In dwellings, frequently un-occupied or at risk of
freezing, an appropriate anti-freeze can be added
to the heating system at a concentration of not more
than 30% by volume. Otherwise it is recommended
to isolate the power and completely drain the
heating and hot water systems.
- The outer case can be cleaned with a damp cloth
having first isolated the boiler from the mains.
Do not use solvents or abrasive cleaners.
10 ENVIRONMENTAL INFORMATION
Gabarrón boilers are manufactured within a certified
environmental management system. From the design
stage, all the production phases are performed
taking into account the most rigorous environmental
requirements. For example, the selection of materials
involves guaranteeing their biodegradability, re-use
and recycling.
When this boiler’s long, useful life is over; it must be
handed in to an electrical equipment collection point
for proper recycling. By ensuring that this product is
correctly disposed of, you will help to avoid any possible
negative effects on the environment and public health
that could occur if this product is not properly handled.
To obtain more detailed information on the recycling of
this product, contact your local authority, your waste
disposal service or the shop where you purchased
the product.
These regulations only apply in EU member countries.
CAUTION – Under no circumstances
should the boiler be switched on
when the system is dry.
!

Elnur powered by Gabarrón | MATTIRA | Installation Guide 19
11 TECHNICAL DATA
MAS15 MAS18
Frequency Hz 50 50
Connection 3x400V+N~ ◆◆
Output limited to 15kW; Maximum intensity A 21.7 26.0
Output limited to 13kW; Maximum intensity A 21.7 26.0
Output limited to 12kW; Maximum intensity A 21.7 -
Output limited to 11kW; Maximum intensity A 21.7 26.0
Output limited to 10kW; Maximum intensity A 21.7 -
Output limited to 9kW; Maximum intensity A 13.0 -
Output limited to 8kW; Maximum intensity A 13.0 13.0
Output limited to 7kW; Maximum intensity A 13.0 -
Output limited to 6kW; Maximum intensity A 13.0 -
Output limited to 5kW; Maximum intensity A 13.0 13.0
Output limited to 4kW; Maximum intensity A 13.0 -
Output limited to 3kW; Maximum intensity A 13.0 -
Connection 230V~ single phase ◆1◆1
Nominal maximum intensity 15kW A 65.2178.31
Nominal maximum intensity 13kW A 56.5165.21
Nominal maximum intensity 12kW A 52.2 -
Nominal maximum intensity 11kW A47.8 52.2
Nominal maximum intensity 10kW A 43.5 -
Nominal maximum intensity 9kW A39.1 -
Nominal maximum intensity 8kW A 34.8 39.1
Nominal maximum intensity 7kW A 30.4 -
Nominal maximum intensity 6kW A 26.1 -
Nominal maximum intensity 5kW A 21.7 26.1
Nominal maximum intensity 4kW A 17.4 -
Nominal maximum intensity 3kW A 13.0 -
Weight kg 32 32
Insulated steel heater header ◆ ◆
Stainless steel plated resistance elements INCOLOY800 Heating ◆ ◆
6 litre expansion vessel ◆ ◆
Electronic regulation of heater modulation ◆ ◆
Digital display ◆ ◆
0-4 bar pressure gauge ◆ ◆
Accelerator pump ◆ ◆
Automatic purge ◆ ◆
TRIACS silent power switches ◆ ◆
Heating flow detector ◆ ◆
100°C heating temperature limiter ◆ ◆
3 bar central heating relief valve ◆ ◆
Ambient thermostat intake ◆ ◆
Sound power level (LWA) dB 36 36
◆ included 1 using connecting links included

Elnur powered by Gabarrón | MATTIRA | Installation Guide 20
21
DECLARACION DE CONFORMIDAD
De acuerdo con la norma ISO / IEC 17050-1
DECLARATION OF CONFORMITY
According to the Standard ISO / IEC 17050-1
Nº 6610000
Nombre del fabricante : ELNUR, S.A.
Manufacturer’s name :
Dirección del fabricante : ELNUR, S.A.
Manufacturer’s address : P.I. El Nogal. Villa Esther, 11
28110 Algete, Madrid, Spain
Declara que el producto : Caldera modulante digital sólo calefacción “MAS”
Declares, that the product : “MAS” Heating digital modulating boiler
Marca : GABARRÓN
Trade Mark :
Modelos : MAS15, MAS18
Models :
ha sido fabricado conforme a las especificaciones técnicas del producto y cumple en todo
las Normas vigentes, en particular:
has been manufactured to the technical specifications of the product and conforms in all
respects to the relevant standards and regulations in force and especially to :
Seguridad : EN 60335-1:2012+A11:2014
Safety : EN 60335-2-35:2002+A1:2007+A2:2011
EN 50106:2008
EMC : EN 55014-1:2006+A1:2009+A2:2011
EN 55014-2:1997+A1:2001+A2:2008
EN 61000-3-2:2006+A1:2009+A2:2009
EN 61000-3-3:2008
Información adicional :
Additional information :
El producto aquí citado lleva el marcado CE y se halla en conformidad con la Directiva de Ecodiseño
2009/125/CE, la Directiva de Baja Tensión 2014/35/UE y la Directiva de EMC 2014/30/UE.
Cualquier uso que no esté de acuerdo con las instrucciones y/o cualquier cambio al aparato invalidarán
esta declaración de conformidad.
The product herewith carries the CE mark and complies with the requirements of Ecodesign Directive
2009/125/EC, the Low Voltage Directive 2014/35/UE and EMC Directive 2014/30/UE.
Any use not according to the instructions and/or any change to the appliance will invalidate this declaration of
conformity.
Algete, 28 de Octubre de 2016
Place, Date
Alberto Fernández
Director Gerente
ELNUR, S.A.