DOMUSA TEKNIK EVOLUTION EV HFM User manual

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

Thank you for choosing a DOMUSA TEKNIK heating boiler. From the
range of DOMUSA TEKNIK products you have chosen the Evolution EV
HFM 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 a
properandgas-oilfedhydraulicinstallation.
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,
useandmaintenanceoftheinstallation.
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
more detailed information on the collection schemes available, contact
either the collection facilities of the local authority or the distributor
wherethepurchasewasmade.

1
INDEX Page
1DESCRIPTION OF COMPONENTS.....................................................................................................................................................................................................................2
2CONTROL ELEMENTS............................................................................................................................................................................................................................................3
3INSTALLATION INSTRUCTIONS.........................................................................................................................................................................................................................4
3.1LOCATION.................................................................................................................................................................................................................................................................4
3.2HYDRAULIC INSTALLATION.....................................................................................................................................................................................................................................4
3.3ELECTRICAL CONNECTION......................................................................................................................................................................................................................................4
3.4FUEL INSTALLATION.................................................................................................................................................................................................................................................4
3.5COMBUSTION PRODUCTS EXHAUSTION................................................................................................................................................................................................................5
3.6INSTALLING THE SRFM2/EVUNDERFLOOR HEATING KIT (OPTIONAL)...........................................................................................................................................................7
3.7INSTALLING HEATING CIRCUIT 2(OPTIONAL).......................................................................................................................................................................................................7
4COMBUSTION PRODUCTS EXHAUSTION......................................................................................................................................................................................................8
4.1COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE DUAL-DUCT DEVICE Ø80/Ø100(TYPR C53)........................................................................................................8
4.2DOUBLE CONDUIT TO COAXIAL EXHAUSTION TRANSFORMATION (ONLY FOR EV30HFM).........................................................................................................................9
4.3COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE HORIZONTALLY-ARRANGED COAXIAL DEVICE Ø80-125(TYPE C13)(ONLY FOR EV30HFM)...................10
4.4COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE VERTICALLY-ARRANGED COAXIAL DEVICE Ø80-125(TYPE C33)(ONLY FOR EV30HFM).........................11
5FILLINGTHE INSTALLATION............................................................................................................................................................................................................................12
6DRAININGTHE BOILER......................................................................................................................................................................................................................................12
7SHUTTING DOWN THE BOILER.......................................................................................................................................................................................................................12
8 FIRST START-UP...................................................................................................................................................................................................................................................12
9INSTALLATION DELIVERY.................................................................................................................................................................................................................................12
10 DIGITAL DISPLAY..............................................................................................................................................................................................................................................13
11TEMPERATURE SELECTION...........................................................................................................................................................................................................................15
11.1SELECTING THE BOILER SET POINT TEMPERATURE ..........................................................................................................................................................................................15
11.2SELECTING THE DHWSETPOINT TEMPERATURE.............................................................................................................................................................................................15
11.3SELECTING THE UNDERFLOOR HEATING FLOW SETPOINT TEMPERATURE (WITH SRFM2/EVKIT OPTION).............................................................................................16
12OPERATION.........................................................................................................................................................................................................................................................17
12.1HEATING FUNCTION ..........................................................................................................................................................................................................................................17
12.2DOMESTIC HOT WATER PRODUCTION FUNCTION..........................................................................................................................................................................................17
12.3FUNCTIONING WITH AN SRFM2/EVUNDERFLOOR HEATING KIT (OPTIONAL).........................................................................................................................................18
12.4HEATING CIRCUIT 2FUNCTIONING(OPTIONAL)..............................................................................................................................................................................................18
13ADDITIONAL FUNCTIONS..............................................................................................................................................................................................................................19
13.1PUMP ANTI-BLOCK FUNCTION ..........................................................................................................................................................................................................................19
13.2ANTI-FROST FUNCTION......................................................................................................................................................................................................................................19
13.3BOILER PRESSURE SENSOR FUNCTION..............................................................................................................................................................................................................19
13.4TELEPHONE RELAY CONNECTION .....................................................................................................................................................................................................................19
13.5ROOM THERMOSTAT CONNECTION..................................................................................................................................................................................................................19
13.6KEYPAD BLOCK FUNCTION ................................................................................................................................................................................................................................20
14 E20 REMOTE CONTROL (OPTIONAL).........................................................................................................................................................................................................21
14.1FUNCTIONING WITHOUT AN OUTDOOR SENSOR.............................................................................................................................................................................................21
14.2FUNCTIONING WITH AN EXTERNAL SENSOR (OPTIONAL)..............................................................................................................................................................................22
14.3DHWMODE FUNCTIONING ..............................................................................................................................................................................................................................22
14.4TELEPHONE RELAY FUNCTION...........................................................................................................................................................................................................................22
15 SAFETY CUT-OUTS...........................................................................................................................................................................................................................................23
15.1TEMPERATURE SAFETY CUT-OUT......................................................................................................................................................................................................................23
15.2BURNER CUT-OUT...............................................................................................................................................................................................................................................23
15.3LOW PRESSURE CUT-OUT ..................................................................................................................................................................................................................................23
16BOILERMAINTENANCE...................................................................................................................................................................................................................................24
16.1CLEANING THE BOILER.......................................................................................................................................................................................................................................24
16.2ANTI-FROST PROTECTION..................................................................................................................................................................................................................................25
16.3BOILER WATER CHARACTERISTICS ....................................................................................................................................................................................................................25
17CIRCULATING PUMPS FLOW CURVES.......................................................................................................................................................................................................26
17.1CHARACTERISTIC CURVES OF THE PUMP..........................................................................................................................................................................................................26
17.2REGULATION OF THE CIRCULATION PUMP.......................................................................................................................................................................................................26
17.3PRESSURE DROP .................................................................................................................................................................................................................................................26
18DIMENSIONS......................................................................................................................................................................................................................................................27
19TECHNICAL DATA.............................................................................................................................................................................................................................................28
20ALARMCODES...................................................................................................................................................................................................................................................29
21ELECTRICAL CONNECTION DIAGRAM......................................................................................................................................................................................................30
22ELECTRICALDIAGRAM...................................................................................................................................................................................................................................31
23BURNER................................................................................................................................................................................................................................................................32
23.1ASSEMBLY...........................................................................................................................................................................................................................................................32
23.2BURNER START-UP..............................................................................................................................................................................................................................................32
23.3ADJUSTING THE COMBUSTION CONDITIONS...................................................................................................................................................................................................32
23.4OIL PRESSURE ADJUSTMENT .............................................................................................................................................................................................................................34
23.5OIL SUPPLY PIPING DIAGRAMS..........................................................................................................................................................................................................................34
23.6TECHNICAL SPECIFICATIONS .............................................................................................................................................................................................................................35
23.7OPERATING CURVES...........................................................................................................................................................................................................................................35
23.8NOZZLES.............................................................................................................................................................................................................................................................35
23.9ELECTRICAL CONNECTION DIAGRAM................................................................................................................................................................................................................36
23.10QUICK CONNECTOR.........................................................................................................................................................................................................................................36
23.11BURNER CONTROL OPERATING SEQUENCE ...................................................................................................................................................................................................37
24FAILURES..............................................................................................................................................................................................................................................................38
25SPARE PARTS LIST............................................................................................................................................................................................................................................40
26WARRANTY CONDITIONS..............................................................................................................................................................................................................................43

Evolution EV HFM
2
1DESCRIPTIONOF COMPONENTS
123
4
5
6
7
8
9
10
11 12 13 10
15
14
16
17
1.Blowoffvalve.
2.Fillingvalve.
3.DHWtemperaturesensor
4.Balanceflueburner.
5.DHWexchanger.
6.Heatingpump.
7.DHWpump.
8.Boilertemperaturesensors.
9.Safetyvalve.
10.Automaticairvent.
11.Pressuresensor.
12.Expansionvessel.
13.CondensatorINOX.
14.Fluegasesoutlet.
15.Castironcorp.
16.DHWflowswitch.
17.DHWflowlimiter.

3
2CONTROLELEMENTS
19 21 2220 23
18
25 24
18. 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.
19. 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.
20. MODE touch button:
When this button is touched the different boiler
temperaturesappearonthedigitaldisplay.
21. ON touch button:
If you place your finger on this button for 1
secondtheboilerwillswitchonoroff.
22. RESET touch button:
If the boiler is in lock-out mode as the alarm has
been triggered, touch the RESET button to reset
thelock-outandrestorefunctioning.
If you are modifying any of the settings or
browsing the user menu, you may touch the
RESET button to exit the menu WITHOUT
SAVINGandreturntothepreviousmenulevel.
23. DHW temperature touch button:
This is used to select the setpoint temperature
for domestic hot water. 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 desired DHW
temperature.
24. Boiler safety thermostat:
This is a cut-out mechanism to ensure the boiler
temperaturedoesnotexceed110ºC.
25. Fume safety thermostat:
This safety thermostat operates when the
temperature of the combustion products
exceeds 110ºC, in order to protect the
polypropyleneduct.

Evolution EV HFM
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. 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
installedunderafixedworktoporanyotherobstaclepreventingaccess.
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 a shut-off valve is fitted at the DHW inlet, it must have a safety valve incorporated, calibrated
to9bar.
- For correct boiler functioning, there must be a pressure of at least 0.5 bar in the domestic hot
watercircuit.
- Before starting up the unit, it is essential to install the condensation siphon supplied with the
boilerdocumentationonthecondensationdraintubeonthebackoftheboiler.
- 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
waterto the drain network.
- Fill the siphon with water before starting up the unit, to prevent
fumescoming out of it.
3.3 Electrical Connection
The boiler is equipped for connection at 230 V~, 50 Hz to terminals 1
and2of 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 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 sealed oil burner (4) (see model in “Technical
Characteristics”). For the fuel installation, proceed in accordance with the burner instructions

5
enclosed with this manual (see “Burner” section). The oil line installation and start-up of the burner
mustbe carried out by qualified, authorised personnel.
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 underacornice 300
B betweentwohorizontally-arranged ducts 1000
C fromanext window 400
D betweentwovertically-arranged ducts 1500
E fromanext ventinggrid 600
F underabalcony (*) 300
G underawindow 600
H underaventing grid 600
I fromabreak backofa building 300
J from anangle ofabuilding 300
K fromthefloor level 2500
L fromavertically/horizontally-arranged outletorpipe (**) 300
M from a front surface at a distanceof 3 metresfrom the exhaustgas outlet 2000
N liketheprevious one,butwith opening 3000
(*) Insofar thebalconywidth doesnotexceed 2000mm.
(**) If the pipe constructive materials were sensitive to the action from the flue gases, this distance should be longer
than500mm.
ATTENTION: All the fittings used in the combustion products exhaustion and air intake are to be those supplied
by DOMUSA TEKNIK firm.

Evolution EV HFM
6

7
3.6 Installing the SRFM2/EV Underfloor Heating Kit (Optional)
The procedure for suitably connecting the SRFM2/EV Underfloor Heating Kit to the Evolution EV
HFMboiler is 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 temperature sensor bulb according to the instructions enclosed with thekit.
- Connect the heating pump to supply terminal strip J2 on the circuit 1 pump connection (pump
BC1;terminalsN and 7) (see “Electrical Connection Diagram").
- Connect the pump´s PWMC cable to sensor terminal strip J3 (terminals 13 and 14) (see
“ElectricalConnection Diagram").
- Connect the 3-way mixer valve motor to supply terminal strip J2 (terminals N, 8 (+) and 9 (-))
(see“Electrical Connection Diagram").
For correct hydraulic installation, carefully follow the assembly and connection instructions
enclosedwith the SRFM2/EV kit.
3.7 Installing heating circuit 2 (Optional)
All the models in the Evolution 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 control a second
heatingcirculation 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 SRFM2/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 "ConnectionDiagram").

Evolution EV HFM
8
4COMBUSTIONPRODUCTS EXHAUSTION
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 ø80/100mm., by means of the dual-duct outlet Kits of ø80/100 code CGAS000265. It is the
default type of exhaustionfor boilers Evolution.
The maximum length of pipe that can be installed is 12 metres (EV 40 HFM) and 15 metres (EV 30
HFM), 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
Examplesof installation:
L12 mts. (EV 30 FM)
L12 mts. (EV 40 FM)

9
4.2 Double conduit to coaxial exhaustion transformation (Only for EV 30 HFM)
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
adaptorfor coaxial tube Ø80/125 (given under order) Code CGAS000213 +Cód. 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:
Combustionairintake
Backexit
Lateral exit
90º elbowØ80

Evolution EV HFM
10
4.3 Combustion products exhaustion and air intake horizontally-arranged coaxial device
ø80-125 (type C13) (Only for EV 30 HFM)
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. Each
elbowof 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-arranged outlet1m

80/125
Cod.CGAS000189
90º coaxial elbow80/125
Cod.CGAS000182
45º coaxial elbow80/125
Cod.CGAS000183
1m coaxial duct80/125
Cod.CGAS000184
Examplesof installation:
L 6 mts. (EV 30 FM)

11
4.4 Combustion products exhaustion and air intake vertically-arranged coaxial device
ø80-125 (type C33) (Only for EV 30 HFM)
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. Each
elbowof 90°, or two of 45°, reduces the available length by 1metre.
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
Examplesof installation:
L7 mts. (EV30 FM)

Evolution EV HFM
12
5FILLINGTHE INSTALLATION
To fill the installation, open the fill valve (2) 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 (10) loose, to let the air out of the installation. Theair 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 (11) 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.
6DRAININGTHE BOILER
The water is drained from the boiler by opening the air drain valve (1) 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.
7SHUTTINGDOWN THE BOILER
To switch off the boiler, place your finger on the power touch button (21) for 1 second. In Off mode,
while the boiler is plugged into the mains and connected to the fuel installation, its heating and hot
water functions will be switched off but the anti-frost protection and pump anti-block functions will
remainactivated.
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. Beforebeginning 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.

13
10 DIGITALDISPLAY
The Evolution boiler is electronic and includes a digital display (18) 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 SRFM2/EV only)
Boiler setpoint temperature selected using the
corresponding touch button
(19) .

Evolution EV HFM
14
Underfloor heating installation flow setpoint
temperature selected using the corresponding
touch button
(19) .
(option SRFM2/EV only)
DHW setpoint temperature selected using the
corresponding touch button
(23) .
Actual boiler pressure, measured by the Pressure
Sensor
(11) .
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
(23) .

15
11 TEMPERATURESELECTION
11.1 Selecting the 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
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

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 30- 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.

Evolution EV HFM
16
11.3 Selecting the Underfloor Heating flow setpoint temperature (with SRFM2/EV kit option)

When the boiler is installed with the optional SRFM2/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.

17
12 OPERATION
The Evolution EV HFM boiler is designed to heat a heating installation and provide instantaneous
domestic hot water. Optionally, an Underfloor Heating Kit (SRFM2/EV) and/or a second heating circuit,
heatingcircuit 2, may be connected to the installation to improve its performance.
12.1 Heating Function
In this mode, the boiler can heat up the heating installation. To do this, 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
will switch on. When the boiler reaches 60ºC it is ready to heat up the heating installation and will
start up the heating pump for this purpose. The burner will shut down when the boiler reaches the
adjusted setpoint temperature. The heating pump and the burner will stop when the room
temperature reaches or exceeds the temperature set on the installation’s room thermostat (if it has
one). If a hot tap is turned on, the instantaneous DHW production function will start up and provide
constantdomestic hot water at the selected DHW setpoint temperature.
The boiler heating function can be totally disabled ( Summer mode) by selecting "OFF" as the boiler
setpoint value. In this operating mode, only the instantaneous DHW production function
will remain enabled. NOTE: When the heating function is disabled, circuit 2 will also
be disabled if it is connected.
12.2 Domestic Hot Water production function
In this mode, the boiler provides instantaneous DHW. To activate this mode, select the desired
DHW setpoint temperature (see "Selecting the DHW setpoint temperature" ). The burner will ignite
until the boiler reaches 60 ºC. If a hot tap is turned on, the instantaneous DHW production system
willstart up and provide constant hot water at the selected setpoint temperature.
The Evolution EV HFM boiler is equipped with system for modulating instantaneous DHW
productionand progressive adjustment of the Domestic Hot Water consumption temperature:
- The modulation allows the boiler power to constantly adapt to the hot water consumption
requirements at all times, without altering the efficiency of the boiler. Consumption savings
arethus obtained together with improved boiler functioning and lower emissions.
- Progressive electronic adjustment of the DHW temperature, a system designed by DOMUSA
TEKNIK, enables the DHW consumption temperature to be stabilised at the temperature
selected using the button on the control panel, and a constant hot water temperature with
no variations is obtained regardless of the water flow required and the cold water inlet
temperature at any given time. This enables optimum hot water comfort and adaptation to
eachuser’s particular needs.
If you wish, you may totally disable the Domestic Hot Water production function by selecting "OFF"
asthe DHW setpoint temperature.

Evolution EV HFM
18
12.3 Functioning with an SRFM2/EV Underfloor Heating Kit (Optional)
The Evolution EV HFM boiler may be used with an SRFM2/EV Underfloor Heating Kit (fitted to
heating circuit 1). This kit basically consists of a motorised 3-way mixing valve, a circulating pump
and an underfloor heating installation flow temperature sensor. For correct hydraulic installation,
carefullyfollow the assembly and connection instructions enclosed 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
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 SRFM2/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.
12.4 Heating circuit 2 functioning (optional)
All the models in the Evolution EV HFM 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.