DOMUSA evolution EV HFDX User manual

INSTALLATION AND OPERATING INSTRUCTIONS
EVOLUTION EV HFDX
ER-0170/1996
CGM-04/392

We thank you for having chosen a DOMUSA TEKNIK heating boiler.
Within the product range of DOMUSA TEKNIK, you have chosen the
Evolution EV HFDX model. This boiler is capable of providing you with
the temperature comfort suitable for your home, as well as balanced
and economical Domestic Hot Water (DHW). This always together with
aproperandgas-oilfedhydraulicinstallation.
This manual makes up an integral and essential part of the product and
it will be delivered to the user. Read carefully the warnings and
recommendations included in this manual, since they provide
significant information as for safety of installation, usage and
maintenance.
The installation of these boilers is to be carried out only by skilled
personnel, in accordance with the standards in force and following the
manufacturer’sinstructions.
Either the start-up or any maintenance operations of these boilers are
to be performed only by the Authorized Techincal Assistance Services
ofDOMUSA TEKNIK.
An improper installation of these boilers could result in damage to
people, animals or property, and the manufacturer takes no
responsibilityonthem.
DOMUSA TEKNIK informs all parties concerned that, in compliance
with section 1 of the first additional provision of Law 11/1997, the
responsibility for delivering packaging waste or used packaging for its
proper environmental management will be that of the final owner of
the product (Article 18.1 Royal Decree 782/1998). At the end of its
useful life, the product must be taken to a selected collection point for
electrical and electronic equipment or must be returned to the
distributor at the time of purchasing a new equivalent appliance. For
more detailed information on the collection schemes available, contact
either the collection facilities of the local authority or the distributor
wherethepurchasewasmade.

1
INDEX Page
1DESCRIPTIONOFCOMPONENTS.................................................................................................................................................................................................................................2
2CONTROLELEMENTS.......................................................................................................................................................................................................................................................3
3 INSTALLATION INSTRUCTIONS.....................................................................................................................................................................................................................................4
3.1LOCATION............................................................................................................................................................................................................................................................................4
3.2HYDRAULIC INSTALLATION .................................................................................................................................................................................................................................................4
3.3ELECTRICAL CONNECTION...................................................................................................................................................................................................................................................4
3.4FUEL INSTALLATION ............................................................................................................................................................................................................................................................4
3.5COMBUSTION PRODUCTS EXHAUSTION..............................................................................................................................................................................................................................5
3.6ANTI-LEGIONELLA FUNCTION..............................................................................................................................................................................................................................................6
3.7INSTALLING HEATING CIRCUIT 2(OPTIONAL).....................................................................................................................................................................................................................6
4COMBUSTIONPRODUCTS EXHAUSTION..................................................................................................................................................................................................................7
4.1COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE DUAL-DUCT DEVICE Ø80/Ø100(TYPR C53)...........................................................................................................................7
4.2DOUBLE CONDUIT TO COAXIAL EXHAUSTION TRANSFORMATION (ONLY FOR EV30HFDX)........................................................................................................................................8
4.3COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE HORIZONTALLY-ARRANGED COAXIAL DEVICE Ø80-125(TYPE C13)(ONLY FOR EV30HFDX).........................................9
4.4COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE VERTICALLY-ARRANGED COAXIAL DEVICE Ø80-125(TYPE C33)(ONLY FOR EV30HFDX)............................................10
5FILLINGTHE INSTALLATION.......................................................................................................................................................................................................................................11
6 DRAINING THEBOILER..................................................................................................................................................................................................................................................11
7 SHUTTING DOWN THEBOILER...................................................................................................................................................................................................................................11
8FIRSTSTART-UP..............................................................................................................................................................................................................................................................11
9INSTALLATIONDELIVERY.............................................................................................................................................................................................................................................11
10DIGITAL DISPLAY.........................................................................................................................................................................................................................................................12
11TEMPERATURE SELECTION.......................................................................................................................................................................................................................................14
11.1SELECTING THE BOILER SETPOINT TEMPERATURE .........................................................................................................................................................................................................14
11.2SELECTING THE DHWSETPOINT TEMPERATURE IN THE HOT WATER TANK.................................................................................................................................................................14
11.3SELECTING THE UNDERFLOOR HEATING FLOW SETPOINT TEMPERATURE (WITH SRX2/EVKIT OPTION)..................................................................................................................15
12OPERATION....................................................................................................................................................................................................................................................................15
12.1HEATING FUNCTION ......................................................................................................................................................................................................................................................15
12.2FUNCTION FOR DHWPRODUCTION BY STORAGE........................................................................................................................................................................................................16
12.3HEATING CIRCUIT 2FUNCTIONING (OPTIONAL)...........................................................................................................................................................................................................16
12.4FUNCTIONING WITH AN SRX2/EVUNDERFLOOR HEATING KIT (OPTIONAL)............................................................................................................................................................16
13ADITIONAL FUNCTIONS ............................................................................................................................................................................................................................................17
13.1PUMPSANTI-BLOCK FUNCTION.....................................................................................................................................................................................................................................17
13.2ANTI-FROST FUNCTION..................................................................................................................................................................................................................................................17
13.3BOILER PRESSURE SENSOR FUNCTION ...........................................................................................................................................................................................................................17
13.4TELEPHONE RELAY CONNECTION...................................................................................................................................................................................................................................17
13.5ROOM THERMOSTAT CONNECTION...............................................................................................................................................................................................................................17
13.6ANTI-LEGIONELLA FUNCTION (OPTIONAL)....................................................................................................................................................................................................................18
13.7KEYPAD BLOCK FUNCTION.............................................................................................................................................................................................................................................18
14E20 REMOTE CONTROL (OPTIONAL).....................................................................................................................................................................................................................18
14.1FUNCTIONING WITHOUT AN OUTDOOR SENSOR...........................................................................................................................................................................................................19
14.2FUNCTIONING WITH AN EXTERNAL SENSOR (OPTIONAL).............................................................................................................................................................................................19
14.3DHWMODE FUNCTIONING...........................................................................................................................................................................................................................................20
14.4TELEPHONE RELAY FUNCTION .......................................................................................................................................................................................................................................20
15SAFETY CUT-OUTS.......................................................................................................................................................................................................................................................21
15.1TEMPERATURE SAFETY CUT-OUT...................................................................................................................................................................................................................................21
15.2BURNER CUT-OUT ..........................................................................................................................................................................................................................................................21
15.3LOW PRESSURE CUT-OUT...............................................................................................................................................................................................................................................21
16 BOILER MAINTENANCE..............................................................................................................................................................................................................................................22
16.1CLEANING THE BOILER ...................................................................................................................................................................................................................................................22
16.2ANTI-FROST PROTECTION ..............................................................................................................................................................................................................................................23
16.3BOILER WATER CHARACTERISTICS..................................................................................................................................................................................................................................23
17CIRCULATING PUMPS FLOW CURVES...................................................................................................................................................................................................................24
17.1CHARACTERISTIC CURVES OF THE PUMP .......................................................................................................................................................................................................................24
17.2REGULATION OF THE CIRCULATION PUMP ....................................................................................................................................................................................................................24
17.3PRESSURE DROP .............................................................................................................................................................................................................................................................24
18DIMENSIONS .................................................................................................................................................................................................................................................................25
18.1EVOLUTION EVHFDX...................................................................................................................................................................................................................................................25
18.2EVOLUTION EVHFDXWITH UNDERFLOOR HEATING KIT SRX2/EV...........................................................................................................................................................................26
19TECHNICALDATA........................................................................................................................................................................................................................................................27
20ELECTRICAL DIAGRAM...............................................................................................................................................................................................................................................28
21ELECTRICAL CONNECTION DIAGRAM...................................................................................................................................................................................................................29
21.1EVOLUTION EVHFDX...................................................................................................................................................................................................................................................29
21.2EVOLUTION EVHFDXWITH UNDERFLOOR HEATING KIT SRX2/EV...........................................................................................................................................................................30
22ALARM CODES..............................................................................................................................................................................................................................................................31
23BURNER...........................................................................................................................................................................................................................................................................32
23.1ASSEMBLY ......................................................................................................................................................................................................................................................................32
23.2OIL INSTALLATION..........................................................................................................................................................................................................................................................32
23.3BURNER START UP..........................................................................................................................................................................................................................................................32
23.4COMBUSTION ADJUSTMENT ..........................................................................................................................................................................................................................................32
23.5OIL PRESSURE ADJUSTMENT..........................................................................................................................................................................................................................................34
23.6OIL FEED PIPE DIAGRAMS...............................................................................................................................................................................................................................................34
23.7TECHNICAL SPECIFICATIONS..........................................................................................................................................................................................................................................35
23.8OPERATING CURVES.......................................................................................................................................................................................................................................................35
23.9NOZZLES ........................................................................................................................................................................................................................................................................35
23.10ELECTRICAL CONNECTION DIAGRAM ..........................................................................................................................................................................................................................36
23.11QUICK CONNECTOR.....................................................................................................................................................................................................................................................36
23.12BURNER CONTROL OPERATING SEQUENCE .................................................................................................................................................................................................................37
24FAILURES........................................................................................................................................................................................................................................................................38
25SPARE PARTS LIST........................................................................................................................................................................................................................................................40
26WARRANTY CONDITIONS..........................................................................................................................................................................................................................................43

Evolution EV HFDX
2
1DESCRIPTIONOFCOMPONENTS
1
2
3
4
5
67 8 4 10
11
12
13
14
15
16
17
18
9
1.Castironcorp.
2.CondensatorINOX.
3.Safetyvalve.
4.Automaticairvent.
5.DHWstoragetank.
6.DHWsafetyvalvedrainagesiphon.
7.DHWsafetyvalve.
8.DHWrecirculationconnection.
9.DHWtemperaturesensor.
10.Pressuresensor.
11.Heatingexpansionvessel.
12.DHWexpansionvessel.
13.Fillingvalve.
14.Heatingpump.
15.Boilertemperaturesensors.
16.DHWpump.
17.Drainagevalve.
18.Balanceflueburner.

3
2CONTROLELEMENTS
20 22 2321 24
19
26 25
19. Digital display:
This is the boiler functioning display, on which
all the operating information, settings and
values appear. In standard operating mode
(default display), the actual boiler temperature
is shown. If any malfunctioning should occur,
the corresponding alarm code will appear on
thedigitaldisplay.
20. Boiler temperature touch button:
This is used to select the boiler setpoint
temperature. If oFF is selected, the heating
function is disabled. To select the desired
temperature, simply place your finger on the "+"
or "-" symbols on the touch button to increase
ordecreasethedesiredboilertemperature.
21. MODE touch button:
When this button is touched the different boiler
temperaturesappearonthedigitaldisplay.
22. ON touch button:
If you place your finger on this button for 1
secondtheboilerwillswitchonoroff.
23. RESET touch button:
If the boiler is in lock-out mode as the alarm has
been triggered, touch the RESET button to reset
the lock-out and restore functioning. If you are
modifying any of the settings or browsing the
user menu, you may touch the RESET button to
exit the menu WITHOUT SAVING and return to
thepreviousmenulevel.
24. DHW temperature touch button:
This is used to select the setpoint temperature
for domestic hot water. If oFF is selected, the
heating function is disabled. To select the
desired temperature, simply place your finger
on the "+" or "-" symbols on the touch button to
increase or decrease the desired DHW
temperature.
25. Boiler safety thermostat:
This is a cut-out mechanism to ensure the boiler
temperaturedoesnotexceed110ºC.
26. Fume safety thermostat:
This safety thermostat operates when the
temperature of the combustion products
exceeds 110ºC, in order to protect the
polypropyleneduct.

Evolution EV HFDX
4
3INSTALLATIONINSTRUCTIONS
The boiler must be installed by personnel authorised by the Department of Industry in accordance
with the applicable regulations and standards in force. However, the following recommendations
mustbecompliedwithwheninstallingtheboiler:
3.1 Location
The boiler must be installed in a sufficiently ventilated site. The boiler must be accessible from the
side formaintenancepurposes.
3.2 Hydraulic installation
The hydraulic installation must be made by qualified personnel. The applicable installation
legislation is to be complied with, and the following recommendations should also be taken into
account.
- The inside of the installation piping should be thoroughly cleaned before switching on the
boiler.
- We recommend inserting cut-off valves between the installation piping and the boiler to
simplifymaintenancetasks.
- If the boiler is installed at a lower height than the heating installation, it is recommendable to
create a siphon at the boiler outlet, to prevent the installation from heating up due to natural
convectionwhenheatingisnotrequired.
-WhentheDHWsupplypressureisover7bars,apressurereducermust be fitted.
- Before starting up the unit, it is essential to install the condensation siphon supplied with the
boilerdocumentation on the condensation drain tube on the back of the boiler.
- The condensation pipe should lead to a drain outlet,
as the Evolution boiler is a condensation boiler and a
large amount of water may be generated. This
connection should be made in accordance with the
regulations for draining off condensation water to the
drainnetwork.
- Fill the siphon with water before starting up the unit, to
preventfumes coming out of it.
3.3 Electrical connection
The boiler is equipped for connection at 230 V~, 50 Hz to terminals 1and 2of terminal strip J1 (see
“ ElectricalConnection Diagram” ).Remember to earth the appliance.
The boiler has two terminal strips, TA1(J5) and TA2(J7) for connecting room thermostats or room
chronothermostats (see “ Electrical Connection Diagram ”) for remote control of heating circuits nº 1
and nº 2 respectively. To correctly connect the room thermostats, firstly remove the bridge joining
the terminals of terminal strip TA1. For connection to TA2, simply connect the thermostat to the
terminalstrip.
3.4 Fuel installation
The model Evolution is supplied with a balanced flue oil burner Domestic (18) (see the model in
the "Technical Data"). For a correct oil line installation proceed in accordance with the burner
instructions enclosed in this manual (see Burner). The oil line installation and the start up operation
ofthe burner has to be carried out by qualified personnel staff.

5
3.5 Combustion products exhaustion
The installation of exhaustion of the products of combustion has to be carried out by qualified
personnel staff and it will fulfill the requirements demanded in the legislation and effective
regulatoryschemes.
The Evolution boilers are balanced flue oil boilers, so that the combustion products exhaustion is
carried out by means of an outlet duct and an air intake from outside. It is recommended that the
position at the exhaustion duct exterior portion should be in accordance with the data of the
followingfigures and table:
Position of the exhaustion duct Minimum distance
mm
A undera cornice 300
B betweentwo horizontally-arrangedducts 1000
C froma nextwindow 400
D betweentwo vertically-arrangedducts 1500
E froma nextventing grid 600
F undera balcony(*) 300
G undera window 600
H undera ventinggrid 600
I froma breakback ofa building 300
J from an angle of a building 300
K fromthe floorlevel 2500
L froma vertically/horizontally-arranged outlet or pipe (**) 300
M from a front surface at a distanceof 3 metres from the exhaust gas outlet 2000
N likethe previousone, butwith opening 3000
(*) Inso farthe balconywidth does not exceed 2000 mm.
(**) If the pipe constructive materials were sensitive to the action from the flue gases, this distance should be longer
than500 mm.
ATTENTION: All the fittings used in the combustion products exhaustion and air intake are to be those
supplied by DOMUSA TEKNIK firm.

Evolution EV HFDX
6
3.6 Anti-legionella function
The Evolution EV HFDX boiler has a legionella prevention function that can be enabled for the
domestichot water in the tank.
This function must be activated by sufficiently qualified personnel. The function is enabled by
changingthe boiler model selectors on the display card inside the control panel.
Before carrying out any work on the inside of the boiler, unplug it from the mains. To activate the
anti-legionella function, remove the top cover of the boiler then remove the lid of the control panel
box using a screwdriver to remove the two screws holding it in place. When this cover has been
removed the electronic circuit board of the display, containing the programming switches, can be
accessed.
Select the anti-legionellafunction by turning selector 4 toON (see "ElectricalDiagram").
3.7 Installing heating circuit 2 (Optional)
All the models in the Evolution EV HFDX range of boilers are supplied with a circulation pump
connected to heating circuit 1 (BC1). In addition to this circuit, all the models are designed to
controla second heating circulation pump in a second heating circuit (circuit 2,BC2).
The hydraulic installation of heating circuit 2 should be made using the optional flow circuit (IC')
on the rear of the boiler (see "Diagrams and Measurements"). If the boiler is supplied by default
with an SRX2/EV underfloor heating kit, connect the circuit 2 return pipe to the Optional return
(RC')provided on the rear of the boiler (see "Sketches and Diagrams").
The circulation pump installed in heating circuit 2 must be electrically connected between
terminals N and 6 on the supply connector block J2(see "ElectricalConnectionDiagram").

7
4COMBUSTIONPRODUCTSEXHAUSTION
4.1 Combustion products exhaustion and air intake dual-duct device ø80/ ø100(typr C53)
In this type, the combustion products exhaustion and air intake are carried out with separated
pipes of Ø80/Ø100mm. by Kits Ø80/Ø100 code CGAS000265. It is the default type of exhaustion for
boilersEvolution.
The maximum length of pipe that can be installed is 12 metres (EV 40 HFDX) and 15 metres (EV
20/30 HFDX), which is the result from adding the pipe metres for the air intake and those of the
combustion products exhaustion. Each elbow of 90°, or two of 45°, reduces the available length by
1metre and 1 metre in horizontal, reduces the available length by 2metres.
It is recommended that the flue gases outlet pipe be fitted slightly upwardly-inclined 2º to 3º thus
preventingwater and condensate projections from being ejected outside.
Dual-ductoutletKit

80/100 inox
Cod.CGAS000265
1m. duct80 inox. Cod. CGAS000145
1m.duct100inox. Cod.CGAS000268
1m.duct100PP Cod.CGAS000355
90º elbow

80 inox Cod.CGAS000147
90ºelbow 100inox Cod. CGAS000267
90ºelbow 100PPCod. CGAS000358
45ºelbow

80inox.Cod. CGAS000148
45º elbow100 inox. Cod. CGAS000266
45ºelbow 100PPCod. CGAS000357
Installationexamples:
L 12 mts. (EV FDX 30)
L 12 mts. (EV FDX 40)

Evolution EV HFDX
8
4.2 Double conduit to coaxial exhaustion transformation (Only for EV 20/30 HFDX)
The boiler Evolution is given prepared for the exhaustion of the products of combustion and air
intake by means of the system of double conduit of Ø100/Ø80. When you want to carry out the
exhaustion of combustion gases by means of coaxial tube of Ø80/125, you will use for it a Kit
adaptorfor coaxial tube Ø80/125 (given under order) Code CGAS000213 + CGAS000222.
Kit adaptor for coaxial tube80/125
Cod. CGAS000213+ Cod. CGAS000222
Thetransformation will be able to realize with two different mounting setups:
1. Back exit : it will be enough with disassembling the combustion air intake of the boiler,
unscrewing the three screw, mount the adaptor in the exit of flue gases of the boiler backwards
and using the flexibletube of entry ofair, connect it to the adaptor.
2. Lateral or upwards exit: it will be realized in the same way, but to mount the adaptor kit
laterally it is necessary to mount an elbow of 90º Ø80 (code CGAS000147), before the adaptor
inthe exit of flue gases.
Inthe following pictures they can observe both setups:
Combustion air intake
Backexit
Lateralexit
90ºelbowØ80

9
4.3 Combustion products exhaustion and air intake horizontally-arranged coaxial device
ø80-125 (type C13) (Only for EV 20/30 HFDX)
The combustion products exhaustion and air intake can be carried out through concentric pipes of
Ø80 mm. for the combustion products exhaustion and Ø125 mm. for the air intake by means of the
horizontally-arrangedoutlet Kit 1m Ø80-125 code CGAS000189.
The maximum horizontal length counted from the boiler, including the kit end, is 6 metres (EV 30
HFDX) and 8 metres (EV 20 HFDX). Each elbow of 90°, or two of 45°, reduces the available length by
1metre.
It is recommended that the flue gases outlet pipe be fitted slightly upwardly-inclined 2º to 3º thus
preventingwater and condensate projections from being ejected outside.
Horizontally-arrangedoutlet1m80/125
Cod.CGAS000189
90ºcoaxial elbow80/125
Cod.CGAS000182
45ºcoaxial elbow80/125
Cod.CGAS000183
1mcoaxialduct80/125
Cod.CGAS000184
Installationexamples:
L 6 mts. (EV FDX 30)

Evolution EV HFDX
10
4.4 Combustion products exhaustion and air intake vertically-arranged coaxial device
ø80-125 (type C33) (Only for EV 20/30 HFDX)
The combustion products exhaustion and air intake can be carried out through concentric pipes of
Ø80 mm. for the combustion products exhaustion and Ø125 mm. for the air intake, by means of the
vertically-arrangedoutlet Kit Ø80-125 code CGAS000231.
The maximum vertical length counted from the boiler, including the kit end, is 7 metres (EV 30
HFC) and 10 metres (EV 20 HFC). Each elbow of 90°, or two of 45°, reduces the available length by 1
metre.
Verticallyoutlet80/125
Cód. CGAS000231 Black tile80/125
Cód. CGAS000074
45º elbow

80/125
Cód. CGAS000183 90º elbow

80/125
Cód. CGAS000182
1mcoaxialduct80/125
Cód. CGAS000184
Black tile 80/125
Cód. CGAS000075
Installationexamples:
L7 mts. (EV FDX 30)

11
5FILLINGTHEINSTALLATION
To fill the installation, open the fill valve (13) until a pressure of 1 - 1.5 bars appears on the “ boiler
pressure ” setting on the display. The circuit should be filled slowly and with the automatic air bleed
valve cap (4) loose, to let the air out of the installation. The air should also be bled from the rest of the
installation using the air bleed valves provided. When the installation has been filled, close the fill
valve.
Evolution boilers have a pressure sensor (10) for controlling the pressure of the installation. If the
installation pressure drops below a minimum of 0.5 bar, the boiler will not switch on and a low
pressurealarm will appear on the display ("AP").
NOTE: Switching on the boiler with no water inside could result in serious damage.
6DRAININGTHEBOILER
The water is drained from the boiler by opening the air drain valve (17) inside the boiler (on the lower
right hand side on opening the door). Connect a flexible tube to this valve and run it to a drain. After
draining the boiler, close thevalve again and remove the flexibletube.
7SHUTTINGDOWNTHE BOILER
To switch off the boiler, place your finger on the power touch button (22) for 1 second. In Off mode,
while the boiler is plugged into the mains and connected to the fuel installation, its heating and DHW
functions will be switched off but the anti-frost protection and pump anti-block functions will remain
activated.
Toshut down the boiler functioning completely, unplug it from the mains andcut off the fuel supply.
8FIRSTSTART-UP
For the guarantee to be valid, the boiler must be started up for the first time by an official DOMUSA
TEKNIK Technical Assistance Service. Before beginning start-up, the following must be complied
with:
-The boiler must be electrically connected to the mains.
-The installation must be filled with water (1 - 1.5 bar mustbe indicated on the digital display).
-Fuel must be reaching the burner at a pressure of no morethan 0.5 bar.
9INSTALLATIONDELIVERY
After the initial start-up, the Technical Assistance Service will explain to the user how the boiler
functions,making any observations they consider relevant.
The installer is responsible for clearly explaining to the user the functioning of any control or
regulationdevice forming part of the installation but not supplied with the boiler.

Evolution EV HFDX
12
10 DIGITALDISPLAY
The Evolution boiler is electronic and includes a digital display (19) showing the actual temperatures,
the setpoint temperatures and the pressure of the installation. In standby mode, the actual boiler
temperature in ºC is shown on the display. The rest of the available display options can be browsed by
touchingthe MODE button below the display, as follows:
MODEtouchbutton
Digitaldisplay
Repeatedly place your finger on the MODE touch button to select the different display options. When
thedesired option has been selected, it will return to standby after 20 secondshaveelapsed.
Thefollowing table shows the different display options: :
Standby. The actual boiler temperature is shown.
Actual boiler temperature.
Actual Domestic Hot Water temperature.
Actual flow temperature of the underfloor heating
installation.
(option SRX2/EV only)
Boiler setpoint temperature selected using the
corresponding touch button
(20) .

13
Underfloor heating installation flow setpoint
temperature selected using the corresponding
touch button
(20) .
(option SRX2/EV only)
DHW setpoint temperature selected using the
corresponding touch button
(24) .
Actual boiler pressure, measured by the Pressure
Sensor
(10) .
Indication of the heating demand status of each
circuit connected to the boiler.
Setpoint of the heating pump speed BC1.
The desired display contrast can be adjusted using
the touch button on the right of the display
(24) .

Evolution EV HFDX
14
11 TEMPERATURESELECTION
11.1 Selecting the boiler setpoint temperature

The desired boiler operating temperature is selected using the touch button, as shown in the
figure. To select the desired temperature, touch the "+" or "-" symbols to increase or decrease the
temperature respectively. When the temperature has been selected, the display will return to
standbymode after a few seconds.
The boiler setpoint temperature can also be selected by using the MODE touch button to browse to
the “
boiler setpoint temperature " display option. When the display shows this option, touch the "+
/-"symbols to select the desired temperature.
If you wish to totally disable the boiler heating function (
Summer mode), select the setpoint value
"OFF"by touching the "-" symbol until this value appears onthedisplay.
The permitted boiler setpoint temperature range is OFF and 30 - 85 ºC. Evolution model boilers are
condensing boilers. In order to obtain maximum boiler performance and energy savings, it is
therefore recommended to select a setpoint temperature of 55-70 ºC, providing this is permitted by
theheating system installed and the insulation conditions of your home.
11.2 Selecting the DHW setpoint temperature in the hot water tank

The desired DHW temperature is selected using the touch button, as shown in the figure. To select
the desired temperature, touch the "+" or "-" symbols to increase or decrease the temperature
respectively. When the temperature has been selected, the display will return to standby mode
aftera few seconds. The DHW setpoint temperature range permitted is OFF and 15- 65 ºC.
The DHW setpoint temperature can also be selected by using the MODE touch button to browse to
the “
DHW setpoint temperature " display option. When this option appears on the display, touch
the"+ /-" symbols to select the desired temperature.
If you wish to totally disable the boiler’s DHW production function, select the setpoint value "OFF"
bytouching the "-" symbol until this value appears on the display.

15
11.3 Selecting the Underfloor Heating flow setpoint temperature (with SRX2/EV kit option)

If the boiler is supplied with an integrated SRX2/EV underfloor heating kit, the desired flow
temperature of the installation can be selected using the touch button as shown in the figure
above. To select the desired temperature, touch the "+" or "-" symbols to increase or decrease the
temperature respectively. When the temperature has been selected, the display will return to
standbymode after a few seconds.
The installation flow setpoint temperature can also be selected by using the MODE touch button to
browse to the “ underfloor heating installation flow setpoint " display option. When this option
appearson the display, touch the "+ /-" symbols to select the desiredtemperature.
If you wish to disable the underfloor heating circuit function, select the setpoint value "OFF" by
touchingthe "-" symbol until this value appears on the display.
The flow setpoint temperature range permitted is OFF and 0 - 45ºC. To obtain optimum
performance from the underfloor heating system installed, we recommend selecting a setpoint
temperature of 25 - 35 ºC, providing this is permitted by the heating system installed and the
insulationin your home.
12 OPERATION
The Evolution EV HFDX boiler is designed to heat a heating installation and provide domestic hot
water by solar collection. Optionally, a second heating circuit, heating circuit 2, may be connected to
theinstallation to improve its performance.
12.1 Heating Function
In this mode, select the desired boiler setpoint temperature (see " Selecting the boiler setpoint
temperature ") and the temperature of room thermostat 1 (TA1) or remote control E20 (if the boiler
is equipped with these). The burner and the heating pump of circuit 1 (BC1) will begin to function
until the installation reaches the selected boiler setpoint temperature (or the temperature on room
thermostat, if the unit has one). When the temperature of the installation drops below the selected
boilertemperature, the burner will start up again, running the heating cycle.
If the DHW temperature in the boiler’s integrated hot water tank is lower than the DHW setpoint
temperature selected, the heating function will cut out and priority will be given to domestic hot
waterproduction, starting up the hot water tank feed pump.
The boiler heating function can be totally disabled (
Summer mode) by selecting "OFF" as the boiler
setpoint value. In this operating mode, only the DHW production function will remain enabled,
providingthere is a DHW tank connected to the boiler.
NOTE: When the heating function is disabled, circuit 2 will also be disabled if it is connected.

Evolution EV HFDX
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12.2 Function for DHW production by storage
In this mode, select the desired DHW setpoint temperature (see " Selecting the DHW setpoint
temperature "). The burner and the DHW pump will switch on. When the hot water tank reaches the
selectedDHW setpoint temperature, it is ready to heat up the heatinginstallation,if it is enabled.
If you wish, you may totally disable the domestic hot water production function by selecting "OFF"
asthe DHW setpoint temperature.
12.3 Heating circuit 2 functioning (Optional)
All the models in the Evolution EV HFDX range of boilers have the option of controlling a second
heating circuit. This requires the installation of a second circulation pump on the boiler. To correctly
install this pump, carefully follow the instructions given in the “Installing heating circuit 2” section
ofthis manual.
Heating circuit 2 will work with the selected boiler setpoint temperature (see “ Selecting the boiler
setpoint temperature ” ) and the temperature of room thermostat 2 (TA2) (if the boiler has one). The
burner and the heating pump of circuit 2(BC2) will begin to function until the installation reaches
the selected boiler setpoint temperature (or the temperature on room thermostat 2, if the unit has
one). When the temperature of the installation drops below the selected boiler temperature, the
burnerwill start up again, running the heating cycle.
NOTE: When the heating function is disabled, if OFF is selected circuit 2 will also be disabled.
12.4 Functioning with an SRX2/EV Underfloor Heating Kit (Optional)
The Evolution EV HFDX boiler may optionally be supplied with an SRX2/EV underfloor heating kit
fitted (it is fitted to heating circuit 1). This kit basically consists of a motorised 3-way mixing valve
andan underfloor heating installation flow temperature sensor.
The underfloor heating installation is worked by the electronic boiler control. The installation flow
sensor is used to adjust the temperature, selecting the installation flow setpoint temperature using
the boiler setpoint adjustment touch button on the control panel, between OFF, 0 and 45ºC (see
“
Selecting the Underfloor Heating flow setpoint temperature ”). In this operating mode, the
electronic control sets the boiler setpoint temperature to 75ºC by default, and the installation flow
temperature can be adjustedto the selected setpointtemperature using the mixing valve.
The boiler setpoint temperature can be changed using the MODE touch button to browse to the
“
boiler temperature setpoint " display option. When the display shows this option, touch the "+ /-"
symbolsto select the desired temperature.
If you wish, the SRX2/EV Underfloor Heating circuit function can be totally disabled, by selecting
"OFF"as the installation flow setpoint temperature.
NOTE: When the Underfloor Heating circuit function is disabled by selecting OFF as the
setpoint temperature, only circuit 1 will be disabled. Circuit 2 will continue to function.

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13 ADITIONALFUNCTIONS
The Evolution EV HFDX boiler is equipped with an electronic control for efficiently regulating
automatic boiler functioning. Italso has thefollowing additional control features:
13.1 Pumps anti-block function
This function prevents the boiler circulation pumps from seizing up if they have been out of use for
along period. This system remains enabled while the boiler is plugged intothe mains.
13.2 Anti-frost function
This function protects the boiler from freezing up during cold weather. If the boiler temperature
drops to below 6 ºC, the heating circulation pump will start up. If the boiler temperature continues
to drop and reaches 4 ºC, the burner will start up, heating the installation. When this function has
been activated, it will continue working until the boiler reaches 8 ºC. This system remains on
standbywhile the boiler is plugged into the mains.
13.3 Boiler pressure sensor function
This function prevents boiler failure caused by a low water level or excess pressure in the boiler. The
pressure is detected by a pressure sensor (6) , and its value appears on the control panel display (see
“ Digital display ”). If the pressure drops below 0.5 bar, the electronic control blocks boiler
functioning and triggers the “AP” alarm on the display. If boiler pressure exceeds 2.5 bar, the "HI"
warning will flash on the display to warn of the excess pressure. If this should occur we recommend
callingthe nearest Technical Assistance Service, and slightly draining the boiler.
13.4 Telephone relay connection
The Evolution boiler is designed to enable a phone relay to be connected for switching the boiler
on and off. This feature allows the boiler to be switched on and off remotely, from any location, by
means of a phone call. The relay is connected to the boiler via terminal strip J6 (see “ Electrical
Connection Diagram ”). When the telephone relay contact closes the boiler switches on. When the
contact opens, the boiler switches off and remains in anti-frost protection and pump anti-block
mode.
13.5 Room thermostat connection
The boiler has two terminal strips, TA1and TA2, for connecting room thermostats or room
chronothermostats (J5 and J7, see " Electrical Connection Diagram ”). This allows the heating mode
for each circuit installed to be switched off according to the room temperature. To suitably connect
them, first remove the bridge joining the terminals of terminal strip TA1, and to connect TA2, simply
connectthe thermostat to the terminal strip.
Installing a room thermostat will optimise the installation’s performance, adapting the heating to
the requirements of your home and obtaining enhanced comfort. Also, if the thermostat allows the
hours of functioning to be programmed (chronothermostat), it can adapt the heating system to the
hoursof use of the installation.

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13.6 Anti-legionella function (optional)
This optional function prevents the bacteria causing legionnaire’s disease from proliferating in the
hot water accumulated in the tank. Every 7 days, the temperature of the water in the tank is raised
to70 ºC to kill any such bacteria. This function will only runif the boiler is left switched on.
The boiler is supplied with this function disabled. To enable it, carefully read the " Installation
Instructions " section. We recommend that the operation for enabling this function is carried out by
qualifiedpersonnel.
13.7 Keypad block function
This function protects the control panel from being accidentally or erroneously pressed while it is
being cleaned, by children or by unauthorised persons. When this function is enabled, the
electronic control will not react when any of the symbols or touch buttons on the control panel are
pressed.
To lock the keypad, keep your fingeron the RESET touch button
for 5 seconds. The word "LOC" will flash on the display until the
controlpanel is unlocked again.
To unlock the keypad, place your finger on the RESET touch
button again for 5 seconds. The display will then return to its
normalstatus.
14 E20REMOTECONTROL (OPTIONAL)
A remote control (E20) may optionally be supplied together with the Evolution EV HFDX boiler. This
remote control can be used to fully operate the boiler from any room in the home it is installed in. The
E20 remote control governs the settings of heating circuit 1 and the installation’s domestic hot water
production(where the case may be).
This remote control allows the hours of home comfort to be programmed for heating circuit 1,
adjusting the installation to the particular requirements of the home by measuring the room
temperature and consequently adapting the installation temperature. The remote control can also be
used to adjust the DHW and heating setpoint temperatures at any time, and for viewing the different
boileroperation settings. It also warns of any functioning anomalies affecting the boiler.
The E20 remote control may optionally be connected to an external sensor, for measuring the outside
temperature. When this option is installed, the remote control can adjust the home comfort level
(circuit 1) according to the weather conditions at each particular time, optimising fuel consumption
andheating comfort in the home.
The E20 remote control takes over the control of the boiler when it is connected to it. The different
selectable boiler temperatures must be modified using the remote control. It is easy to install, only
requiring 2 wires for communication between the boiler and the E20 control. It is connected to the
boiler by connecting the two wires on terminal strip J4 (see “Electrical Connection Diagram”). For
correct installation and functioning,carefully read theinstructions enclosed with the remote control.
The following sections contain a general explanation of the E20 remote control’s different operating
modesand options.