DOMUSA TEKNIK EVOLUTION EV HFC Series User manual

INSTALLATION AND OPERATING INSTRUCTIONS
EVOLUTION EV HFC

Thank you for choosing a DOMUSA TEKNIK heating boiler. From the
range of DOMUSA TEKNIK products you have chosen the Evolution EV
HFC model. With a suitable hydraulic installation, this oil-fired boiler
willprovidetheideallevelofcomfortforyourhome.
This manual forms an essential part of the product and it must be
given to the user. Read the warnings and recommendations in the
manual carefully, as they contain important information on the safety,
use and maintenance of the installation.
These boilers are to be installed by skilled personnel only, in
accordance with the legislation in force and following the
manufacturer’sinstructions.
The start-up of these boilers and any maintenance operations must
only be carried out by DOMUSA TEKNIK’s Authorised Technical
AssistanceServices.
Incorrect installation of these boilers could result in damage to people,
animals or property, and the manufacturer will hold no liability in such
cases.
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
moredetailedinformationonthecollectionschemesavailable,contact
either the collection facilities of the local authority or the distributor
where the purchase was made.

1
INDEX Page
1 DESCRIPTION OF COMPONENTS....................................................................................................................................................................................................2
2 CONTROL ELEMENTS..........................................................................................................................................................................................................................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
3.6INSTALLING A DHWSTORAGE TANK SANIT(OPTIONAL).......................................................................................................................................................................6
3.7ANTI-LEGIONELLA FUNCTION (WITH HOT WATER TANK ONLY)...............................................................................................................................................................6
3.8INSTALLING THE SRFC2/EVUNDERFLOORHEATINGKIT (OPTIONAL)................................................................................................................................................6
3.9HEATING CIRCUIT 2(OPTIONAL).............................................................................................................................................................................................................7
4 COMBUSTION PRODUCTS EXHAUSTION.....................................................................................................................................................................................8
4.1COMBUSTION PRODUCTS EXHAUSTION ANDAIR INTAKE DUAL-DUCTDEVICEØ80/Ø100(TYPR C53) ...............................................................................................8
4.2DOUBLE CONDUIT TO COAXIAL EXHAUSTION TRANSFORMATION (ONLY FOREV20/30HFC)...........................................................................................................9
4.3COMBUSTION PRODUCTS EXHAUSTION ANDAIR INTAKE HORIZONTALLY-ARRANGED COAXIAL DEVICE Ø80-125(TYPE C13)(ONLYFOR EV20/30HFC).........10
4.4COMBUSTION PRODUCTS EXHAUSTION ANDAIR INTAKE VERTICALLY-ARRANGED COAXIAL DEVICE Ø80-125(TYPE C33)(ONLY FOR EV20/30HFC)...............11
5 FILLING THE INSTALLATION..........................................................................................................................................................................................................12
6 DIGITAL DISPLAY...............................................................................................................................................................................................................................12
7 TEMPERATURE SELECTION............................................................................................................................................................................................................14
7.1SELECTING THE BOILERSET POINT TEMPERATURE ................................................................................................................................................................................14
7.2SELECTING THE DHWSETPOINT TEMPERATURE (WITH HOT WATER TANK ONLY)..............................................................................................................................14
7.3SELECTING THE UNDERFLOORHEATING FLOWSETPOINT TEMPERATURE (WITHSRFC2/EVKIT OPTION).........................................................................................15
8 OPERATION.........................................................................................................................................................................................................................................15
8.1FUNCTIONING IN “HEATING ONLY”MODE..........................................................................................................................................................................................15
8.2FUNCTIONING WITH A SANIT HOT WATER TANK...................................................................................................................................................................................16
8.3HEATING CIRCUIT 2FUNCTIONING(OPTIONAL)..................................................................................................................................................................................16
8.4FUNCTIONING WITH AN SRFC2/EVUNDERFLOOR HEATING KIT (OPTIONAL).................................................................................................................................16
9 ADDITIONAL FUNCTIONS..............................................................................................................................................................................................................17
9.1PUMP ANTI-BLOCK FUNCTION..............................................................................................................................................................................................................17
9.2ANTI-FROST FUNCTION ........................................................................................................................................................................................................................17
9.3BOILER PRESSURE SENSOR FUNCTION ..................................................................................................................................................................................................17
9.4TELEPHONE RELAY CONNECTION .........................................................................................................................................................................................................17
9.5ROOM THERMOSTAT CONNECTION......................................................................................................................................................................................................17
9.6ANTI-LEGIONELLA FUNCTION (OPTIONAL)(WITH HOT WATER TANK ONLY)........................................................................................................................................18
9.7KEYPAD BLOCK FUNCTION....................................................................................................................................................................................................................18
10 E20 REMOTE CONTROL (OPTIONAL).......................................................................................................................................................................................19
10.1FUNCTIONINGWITHOUTANOUTDOORSENSOR................................................................................................................................................................................19
10.2FUNCTIONING WITH ANEXTERNAL SENSOR (OPTIONAL)..................................................................................................................................................................19
10.3FUNCTIONINGWITH A DHWTANK(OPTIONAL)..............................................................................................................................................................................20
10.4TELEPHONERELAYFUNCTION............................................................................................................................................................................................................20
11 SAFETY CUT-OUTS.........................................................................................................................................................................................................................21
11.1TEMPERATURE SAFETY CUT-OUT........................................................................................................................................................................................................21
11.2BURNER CUT-OUT..............................................................................................................................................................................................................................21
11.3LOW PRESSURE CUT-OUT...................................................................................................................................................................................................................21
12 DRAINING THE BOILER..................................................................................................................................................................................................................22
13 SHUTTING DOWN THE BOILER..................................................................................................................................................................................................22
14 FIRST START-UP...............................................................................................................................................................................................................................22
15 INSTALLATION DELIVERY.............................................................................................................................................................................................................22
16 BOILER MAINTENANCE.................................................................................................................................................................................................................23
16.1CLEANING THE BOILER .......................................................................................................................................................................................................................23
16.2ANTI-FROST PROTECTION ..................................................................................................................................................................................................................24
16.3BOILER WATER CHARACTERISTICS......................................................................................................................................................................................................24
17 TECHNICAL DATA...........................................................................................................................................................................................................................25
18 CIRCULATING PUMP FLOW CURVES........................................................................................................................................................................................26
18.1CHARACTERISTIC CURVES OF THE PUMP............................................................................................................................................................................................26
18.2REGULATION OF THE CIRCULATION PUMP.........................................................................................................................................................................................26
18.3PRESSURE DROP.................................................................................................................................................................................................................................26
19 DIAGRAMS AND MEASUREMENTS...........................................................................................................................................................................................27
20 ELECTRICAL CONNECTION DIAGRAM.....................................................................................................................................................................................28
21 ELECTRICAL DIAGRAM..................................................................................................................................................................................................................29
22 ALARM CODES.................................................................................................................................................................................................................................30
23 BURNER..............................................................................................................................................................................................................................................31
23.1ASSEMBLY..........................................................................................................................................................................................................................................31
23.2BURNER START-UP.............................................................................................................................................................................................................................31
23.3ADJUSTING THE COMBUSTION CONDITIONS......................................................................................................................................................................................31
23.4OIL PRESSURE ADJUSTMENT ..............................................................................................................................................................................................................33
23.5OIL SUPPLY PIPING DIAGRAMS...........................................................................................................................................................................................................33
23.6TECHNICAL SPECIFICATIONS ..............................................................................................................................................................................................................34
23.7NOZZLES............................................................................................................................................................................................................................................34
23.8ELECTRICAL CONNECTION DIAGRAM .................................................................................................................................................................................................34
23.9QUICK CONNECTOR ...........................................................................................................................................................................................................................35
23.10BURNER CONTROL OPERATING SEQUENCE......................................................................................................................................................................................36
24 SPARE PARTS LIST...........................................................................................................................................................................................................................37
25 FAILURES...........................................................................................................................................................................................................................................40

Evolution EV HFC
2
1DESCRIPTION OF COMPONENTS
1
2
3
4
5 6
7
8
9
10
1.- Castironbody.
2.- Stainlesssteelcondenser.
3.- Safety valve.
4.- Automaticairvent.
5.- Expansionvessel.
6.- Pressuresensor.
7.- Heatingcirculating pump.
8.- Boiler temperature sensors.
9.- Drainagevalve.
10.- Domestic sealedburner.

3
2CONTROL ELEMENTS
12 14 1513 16
11
18 17
11.Digitaldisplay:
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.
12.Boilertemperaturetouchbutton:
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 or decrease the desired boiler
temperature.
13. MODEtouch button:
When this button is touched the different
boiler temperatures appear on the digital
display.
14.ONtouchbutton:
If you place your finger on this button for 1
secondtheboilerwillswitchonoroff.
15. RESETtouch 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 the previousmenulevel.
16.DHW temperature touch button:
This button can be used to select the desired
domestic hot water temperature (only if a DHW
tank is connected to the boiler). If oFF is
selected, the DHW function will be disabled. To
select the desired temperature, simply place
your finger on the "+" or "-" symbols on the
touch button to increase or decrease the
desiredDHW temperature.
17.Boiler safety thermostat:
This is a cut-out mechanism to ensure the
boilertemperature does not exceed 110ºC.
18.Fumesafety thermostat:
This safety thermostat operates when the
temperature of the combustion products
exceeds 110ºC, in order to protect the
polypropyleneduct.

Evolution EV HFC
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
mustbe compliedwith when installingthe boiler:
3.1 Location
The boiler must be installed in a sufficiently ventilated site. It is essential to leave a space at the
top of the boiler so that it is accessible for maintenance operations. It must therefore not be
installedunder a fixed worktop or anyother obstacle preventingaccess.
It must maintain sufficient access space to carry out preventive or corrective maintenance
operations.
3.2 HydraulicInstallation
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
simplifymaintenance tasks.
- 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
drain network.
- Fill the siphon with water before starting up the unit, to
preventfumes coming out of it.
3.3 ElectricalConnection
The boiler is equipped for connection at 230 V~, 50 Hz to terminals 1and 2of terminal strip J1 (see
“ ElectricalConnection Diagram ”). Rememberto 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 1
and 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 Evolution boiler is supplied with a Domestic oil burner (10) (see model in “Technical
Characteristics”). For the fuel installation, proceed in accordance with the burner instructions
enclosed with this manual (see “Burner” section). The oil line installation and start-up of the burner
mustbe carried ou

5
3.5 Combustionproducts 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
regulatory schemes.
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
followingfiguresand table:
Positionof theexhaustionduct Minimum distance
mm
A undera cornice 300
B betweentwohorizontally-arrangedducts 1000
Cfrom anext window 400
D betweentwo vertically-arrangedducts 1500
E froma next ventinggrid 600
F under a balcony (*) 300
G under a window 600
Hunder a venting grid 600
I froma breakbackof abuilding 300
Jfrom anangle of abuilding 300
Kfrom thefloor level 2500
Lfrom avertically/horizontally-arrangedoutlet orpipe (**) 300
M froma front surfaceat a distanceof 3 metresfrom theexhaustgas outlet 2000
N likethe previousone,but with opening 3000
(*)In sofar the balconywidth does not exceed 2000mm.
(**) 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 HFC
6
3.6 Installinga DHW storage tank Sanit (Optional)
The procedure for suitably connecting a Sanit DHW tank to the Evolution EV HFC boiler is as
follows:
-Unplug the boiler from the mains.
- Connect a DHW temperature sensor (supplied optionally) to sensor terminal strip J3 (terminals
16 and 17), first removing the resistance (Ra) supplied by default (see “Electrical Connection
Diagram").
-Insert the temperature sensor bulb in the bulb-holder sheath provided on the hotwatertank.
- Connect the hot water tank feed pump to the supply terminal strip J2 (BV; terminals N and 5)
see“Electrical ConnectionDiagram").
For correct hydraulic installation, carefully follow the assembly and connection instructions
enclosedwith the hot water tank.
3.7 Anti-legionellafunction (with hot water tank only)
The Evolution EV HFC boiler allows the activation of the legionella prevention function for The
Evolution EV HFC boiler with a Sanit hot water tank installed has a legionella prevention function
that can be enabled for the domestic hot water inthetank.
This function must be activated by sufficiently qualified personnel. The function is enabled by
changingthe boiler model selectors on the display card inside thecontrol 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 byturning selector 4 to ON(see "Electrical Diagram").
3.8 Installingthe SRFC2/EV Underfloor Heating Kit (Optional)
The procedure for suitably connecting the SRFC2/EV Underfloor Heating Kit to the Evolution EV
HFC boileris as follows:
-Unplug the boiler from the mains.
- Connect a flow temperature sensor (supplied with the kit) to sensor terminal strip J3 (terminals
15 and 16), first removing the resistance (Rr) supplied by default (see “Electrical Connection
Diagram").
-Fit the temperaturesensor bulb accordingtothe instructionsenclosedwith the kit.
- Connect the heating pump to supply terminal strip J2 on the circuit 1 pump connection (pump
BC1;terminals N and 7)(see “Electrical Connection Diagram").
- Connect the PWMC cable to sensor terminal strip J3 (terminals 13 and 14) (see “Electrical
ConnectionDiagram").
- Connect the 3-way mixer valve motor to supply terminal strip J2 (terminals N, 8 (+) and 9 (-))
(see“Electrical ConnectionDiagram").
For correct hydraulic installation, carefully follow the assembly and connection instructions
enclosedwith the SRFC2/EV kit.

7
3.9 Heatingcircuit 2 (Optional)
All the models in the Evolution EV HFC 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 there is an SRFC2/EV underfloor
heating kit connected to the optional flow IC', heating circuit 2 should be connected at the
additionalsockets provided in the kit (on the boiler T-connectors).
The circulation pump installed in heating circuit 2 must be electrically connected between
terminals N and 6 on the supply connector block J2 (see“Electrical Connection Diagram").

Evolution EV HFC
8
4COMBUSTION PRODUCTS EXHAUSTION
4.1 Combustionproducts exhaustion and airintake dual-duct device ø80 / ø100 (typr C53)
In this type, the combustion products exhaustion and air intake are carried out with separated
pipes of Ø80/100mm, by means of the dual-duct outlet Kits of Ø80/100 code CGAS000265. It is the
defaulttype of exhaustion for boilers Evolution.
The maximum length of pipe that can be installed is 12 metres (EV 40 HFC) and 15 metres (EV 20/30
HFC) 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 1 metre, and 1
metreof horizontalpipe represents 2metres of vertical pipe.
It is recommended that the flue gases outlet pipe be fitted slightly upwardly-inclined 2º to 3º thus
preventing water 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
Examplesof installation:

9
4.2 Double conduit to coaxial exhaustion transformation (Onlyfor EV20/30 HFC)
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 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
adaptor for coaxial tube Ø80/125 (given under order) Code CGAS000213 +
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 offlue gases ofthe boiler backwards
and using the flexible tubeof entry of air, connectit 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 offlue gases.
Inthe followingpictures they canobserve both setups:
Combiustion air intake
Back exit
Lateral exit
90º elbow Ø 80

Evolution EV HFC
10
4.3 Combustionproducts exhaustion and air intake horizontally-arranged coaxial device
ø80-125 (type C13)(Only for EV 20/30 HFC)
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
HFC) and 8 metres (EV 20 HFC). Each elbow of 90°, or two of 45°, reduces the available length by 1
metre,.
It is recommended that the flue gases outlet pipe be fitted slightly upwardly-inclined 2º to 3º thus
preventing water and condensate projections from being ejected outside.
Horizontally-arranged outlet 1m

80/125inox
Cod. CGAS000189
Horizontally-arranged outlet 1m 80/125PP
Cod. CGAS000188
90ºcoaxial elbow80/125 inox
Cod.CGAS000182
90º coaxial elbow80/125 PP
Cod.CGAS000080
45º coaxial elbow 80/125 inox
Cod.CGAS000183
45º coaxial elbow80/125 PP
Cod.CGAS000081
1m coaxial duct

80/125inoxCod. CGAS000184
1m coaxial duct 80/125PPCod. CGAS000082
Examplesof installation:
L 8mts. (EV 20HFC)
L 6 mts. (EV 30 HFC)

11
4.4 Combustionproducts exhaustion and air intake vertically-arrangedcoaxial device
ø80-125 (type C33)(Only for EV 20/30 HFC)
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)
and10 metres (EV 20 HFC). Each elbow of 90°, or two of 45°, reduces the available lengthby 1 metre.
Vertically outlet 80/125
inoxCód.CGAS000181
Vertically outlet 80/125
PP Cód.CGAS000360
Black tile 80/125
Cód. CGAS000074
45º elbow

80/125 inoxCód. CGAS000183
45º elbow 80/125PP Cód. CGAS000081
90º elbow

80/125 inox Cód. CGAS000182
90º elbow

80/125 PP Cód. CGAS000080
1m coaxial duct 80/125
inox Cód. CGAS000184
1m coaxial duct80/125 PP
Cód. CGAS000082
Black tile

80/125
Cód.CGAS000075
Examplesof installation:
L10mts.(EV20HFC)
L 7 mts. (EV 30HFC)

Evolution EV HFC
12
5FILLING THE INSTALLATION
To fill the installation, it should be provided with a fill valve, which can be used to fill the installation
until a pressure of 1,5 - 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 beenfilled, close the fill valve.
Evolution boilers have a pressure sensor (6) 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 willappear onthe display ("AP").
NOTE: Switching on the boiler withno waterinside could result in serious damage.
6DIGITALDISPLAY
The Evolution boiler is electronic and includes a digital display (11) 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
thedesiredoptionhasbeenselected,it will return to standbyafter 20 seconds have elapsed.
Thefollowing table shows the different display options:
Standby. The actual boiler temperature is shown.
Actual boiler temperature.
Actual domestic hot water temperature (with hot
water tank).

13
Actual flow temperature of the underfloor heating
installation
(option SRFC2/EV only)
Boiler setpoint temperature selected using the
corresponding touch button
(12) .
Underfloor heating installation flow setpoint
temperature selected using the corresponding
touch button
(12) .
(option SRFC2/EV only)
DHW setpoint temperature selected using the
corresponding touch button
(16) (with hot water
tank).
Actual boiler pressure, measured by the Pressure
Sensor
(6) .
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
(16) .

Evolution EV HFC
14
7TEMPERATURESELECTION
7.1 Selectingthe boiler set point 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
standby mode after a few seconds.
The boiler setpointtemperature can alsobe selected by using the MODE touch buttonto browse to
the “ boiler setpoint temperature " display option. When the display shows this option, touch the "+
/-"symbols to select thedesired temperature.
If you wish to totally disable the boiler heating function ( Summer mode), select the setpoint value
"OFF"by touching the "-" symboluntilthis value appears on the display.
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 thisis permitted by
theheating system installed and theinsulation conditions of your home.
7.2 Selectingthe DHW setpoint temperature (withhotwater tankonly)

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 setpointtemperature 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
7.3 Selectingthe Underfloor Heating flow setpoint temperature (with SRFC2/EV kit option)

When the boiler is installed with the optional SRFC2/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
standby mode 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
appears on the display, touch the "+/-" symbols to selectthedesired temperature.
If you wish to disable the underfloor heating circuit function, select the setpoint value "OFF" by
touching the "-" symbol untilthis 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.
8OPERATION
The Evolution EV HFC boiler is supplied in “heating only” mode by default, designed only to heat up a
heating installation (heating circuit 1). Optionally, a Domestic Hot Water tank (Sanit) and/or an
Underfloor Heating Kit (SRFC2/EV) and/or a second heating circuit, heating circuit 2, may be
connectedto the installation to improve its performance.
8.1 Functioning in “Heating Only” mode
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
boiler temperature, the burner will start up again, running the heating cycle.
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,
providing there is a DHW tank connectedtothe boiler.
NOTE: Whenthe heating function is disabled, circuit 2will also be disabledif it isconnected.

Evolution EV HFC
16
8.2 Functioning with a Sanit hot water tank
The Evolution EV HFC boiler may be installed together with a hot water tank from the DOMUSA
TEKNIK Sanit range, to obtain domestic hot water. For correct installation of the tank, carefully
followthe instructions given in the “Installation Instructions” section of this manual.
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
selected DHW setpoint temperature, it is ready to heat up the heating installation if it is enabled,
starting up the heating pump and switching off the DHW pump. The burner will shut down when
the boiler reaches its selected setpoint temperature. The heating pump will stop when the room
temperature reaches or exceeds the temperature set on the installation’s room thermostat (if it has
one).
If you wish, you may totally disable the domestic hot water production function by selecting "OFF"
asthe DHW setpoint temperature.
8.3 Heatingcircuit 2 functioning (Optional)
All the models in the Evolution EV HFC range of boilers have the option of controlling a second
heatingcircuit. 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
ofthismanual.
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: Whenthe heating function is disabled, if OFF is selected circuit 2 will also be disabled.
8.4 Functioning with an SRFC2/EVUnderfloor Heating Kit (Optional)
The Evolution EV HFC boiler may be used with an SRFC2/EV Underfloor Heating Kit (fitted to
heating circuit 1). This kit basically consists of a motorised 3-way mixing valve, a circulation pump
and an underfloor heating installation flow temperature sensor. For correct hydraulic installation,
carefully follow the assembly and connection instructionsenclosed with the kit.
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 45 ºC (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
temperaturecanbe adjusted to the selected setpoint temperature 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 SRFC2/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.

17
9ADDITIONALFUNCTIONS
The Evolution EV HFCboiler is equipped with an electronic control for efficiently regulating automatic
boilerfunctioning. It also has the following additional control features:
9.1 Pump anti-block function
This function prevents the boiler circulation pumps from seizing up if they have been out of use for
alongperiod. This system remains enabled while theboiler is plugged into the mains.
9.2 Anti-frostfunction
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 8ºC. This system remains on
standbywhile the boiler is plugged into the mains.
9.3 Boilerpressuresensor function
This function prevents boiler failure caused by a lowwater level or excess pressure in theboiler. 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.
9.4 Telephonerelay 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.
9.5 Roomthermostat 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 terminalstrip.
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.

Evolution EV HFC
18
9.6 Anti-legionellafunction (optional) (with hot water tank only)
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
to 70 ºC to kill any suchbacteria. This function willonly run if 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.
9.7 Keypadblock 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.
Tolockthe keypad, keep your finger on the RESET touchbutton
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.