DOMUSA Evolution EV AC User manual

INSTALLATION AND OPERATING INSTRUCTIONS
¬EVOLUTION EV AC
ER-0170/1996
CGM-04/392

Thank you for choosing a DOMUSA heating boiler. From the range of
DOMUSA products you have chosen the Evolution EV AC model. With
a suitable hydraulic installation, this oil-fired boiler will provide the
ideallevelofcomfortforyourhome.
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’s Authorised Technical Assistance
Services.
Incorrect installation of these boilers could result in damage to people,
animals or property, and the manufacturer will hold no liability in such
cases.

1
CONTENTS Page
1 LIST OF COMPONENTS.........................................................................................................................................................................................................................................2
2CONTROL ELEMENTS............................................................................................................................................................................................................................................3
3INSTALLATION INSTRUCTIONS.........................................................................................................................................................................................................................4
3.1LOCATION.................................................................................................................................................................................................................................................................4
3.2HYDRAULIC INSTALLATION.....................................................................................................................................................................................................................................4
3.3ELECTRICAL CONNECTION......................................................................................................................................................................................................................................4
3.4OIL INSTALLATION...................................................................................................................................................................................................................................................4
3.5REMOVAL OF COMBUSTION PRODUCTS................................................................................................................................................................................................................4
3.6INSTALLING A SANIT STORAGE HEATER (OPTIONAL)...........................................................................................................................................................................................6
3.7ANTI-LEGIONNAIRE’S DISEASE FUNCTION (WITH STORAGE HEATER ONLY).......................................................................................................................................................6
3.8INSTALLING THE UNDERFLOOR HEATING KIT SRAC2/EV(OPTIONAL)............................................................................................................................................................6
4REMOVALOFCOMBUSTION PRODUCTS......................................................................................................................................................................................................7
4.1Ø80COMBUSTION PRODUCT EXHAUSTION AND AIR INTAKE DUAL DUCT SYSTEM (TYPE C53).......................................................................................................................7
4.2CHANGING FROM DUAL DUCT FUME REMOVAL TO COAXIAL FUME REMOVAL.................................................................................................................................................8
4.3Ø80-125CONCENTRIC HORIZONTAL DUCT FOR REMOVAL OF COMBUSTION PRODUCTS AND AIR INTAKE (TYPE
C13)..............................................................................9
4.4Ø80-125CONCENTRIC VERTICAL DUCT FOR REMOVAL OF COMBUSTION PRODUCTS AND AIR INTAKE (TYPE
C33)..................................................................................10
5FILLINGTHE INSTALLATION............................................................................................................................................................................................................................11
6DIGITAL DISPLAY ................................................................................................................................................................................................................................................11
7TEMPERATURE SELECTION..............................................................................................................................................................................................................................12
7.1SELECTING THE BOILER SET POINT TEMPERATURE.............................................................................................................................................................................................12
7.2SELECTING THE HOT WATER SET POINT TEMPERATURE (WITH STORAGE HEATER ONLY)..............................................................................................................................12
7.3SELECTING THE UNDERFLOOR HEATING OUTLET SET POINT TEMPERATURE (WITH SRAC2/EVKIT OPTION).............................................................................................13
8FUNCTIONING......................................................................................................................................................................................................................................................13
8.1FUNCTIONING IN “HEATING ONLY” MODE........................................................................................................................................................................................................13
8.2FUNCTIONING WITH SANIT STORAGE HEATER (OPTIONAL).............................................................................................................................................................................14
8.3FUNCTIONING WITH THE UNDERFLOOR HEATING KIT SRAC2/EV(OPTIONAL)..........................................................................................................................................14
9ADDITIONAL FUNCTIONS................................................................................................................................................................................................................................15
9.1PUMP ANTI-BLOCK FUNCTION.............................................................................................................................................................................................................................15
9.2ANTI-FROST FUNCTION........................................................................................................................................................................................................................................15
9.3BOILER PRESSURE SENSOR FUNCTION................................................................................................................................................................................................................15
9.4TELEPHONE RELAY CONNECTION........................................................................................................................................................................................................................15
9.5ROOM THERMOSTAT CONNECTION ....................................................................................................................................................................................................................16
9.6ANTI-LEGIONNAIRE’S DISEASE FUNCTION (OPTIONAL)(WITH STORAGE HEATER ONLY)..............................................................................................................................16
10 E20 REMOTE CONTROL (OPTIONAL).........................................................................................................................................................................................................16
10.1FUNCTIONING WITHOUT AN EXTERNAL SENSOR.............................................................................................................................................................................................17
10.2FUNCTIONING WITH AN EXTERNAL SENSOR (OPTIONAL)..............................................................................................................................................................................17
10.3FUNCTIONING WITH A DOMESTIC HOT WATER STORAGE HEATER (OPTIONAL)...........................................................................................................................................18
10.4TELEPHONE RELAY FUNCTION ..........................................................................................................................................................................................................................18
11 SAFETY CUT-OUT SYSTEMS..........................................................................................................................................................................................................................18
11.1TEMPERATURE SAFETY CUT-OUT......................................................................................................................................................................................................................18
11.2BURNER CUT-OUT ..............................................................................................................................................................................................................................................18
11.3LOW PRESSURE CUT-OUT..................................................................................................................................................................................................................................19
12DRAININGTHE BOILER...................................................................................................................................................................................................................................19
13SWITCHING OFF THE BOILER.......................................................................................................................................................................................................................19
14INITIAL START-UP.............................................................................................................................................................................................................................................19
15 DELIVERY AND INSTALLATION....................................................................................................................................................................................................................19
16BOILERMAINTENANCE...................................................................................................................................................................................................................................20
16.1CLEANING THE BOILER.......................................................................................................................................................................................................................................20
16.2ANTI-FROST PROTECTION..................................................................................................................................................................................................................................21
16.3BOILER WATER CHARACTERISTICS ....................................................................................................................................................................................................................21
17TECHNICAL CHARACTERISTICS...................................................................................................................................................................................................................22
18CIRCULATING PUMP FLOW CURVES.........................................................................................................................................................................................................23
19 DIAGRAMS AND MEASUREMENTS............................................................................................................................................................................................................23
20 CONNECTION DIAGRAM................................................................................................................................................................................................................................24
21ELECTRICALDIAGRAM...................................................................................................................................................................................................................................25
22ALARMCODES...................................................................................................................................................................................................................................................26
23BURNER................................................................................................................................................................................................................................................................27
23.1ASSEMBLY...........................................................................................................................................................................................................................................................27
23.2BURNER START-UP .............................................................................................................................................................................................................................................27
23.3ADJUSTING THE COMBUSTION CONDITIONS...................................................................................................................................................................................................27
23.4PRIMARY AIR ADJUSTMENT...............................................................................................................................................................................................................................28
23.5COMBUSTION LINE ADJUSTMENT.....................................................................................................................................................................................................................28
23.6CORRECT POSITION OF ELECTRODES................................................................................................................................................................................................................28
23.7OIL PRESSURE ADJUSTMENT.............................................................................................................................................................................................................................29
23.8OIL SUPPLY PIPING DIAGRAMS..........................................................................................................................................................................................................................29
WARNING:CHECK PERIODICALLY THE FLEXIBLE PIPES CONDITIONS. USING KEROSENE, THEY HAVE TO BE REPLACED AT LEAST EVERY 2YEARS.....................................29
23.9TECHNICAL SPECIFICATIONS .............................................................................................................................................................................................................................30
23.10OPERATING CURVES ........................................................................................................................................................................................................................................30
23.11OIL FLOW VERSUS NOZZLE AND PUMP PRESSURE........................................................................................................................................................................................30
23.12NOZZLES...........................................................................................................................................................................................................................................................30
23.13ELECTRICAL CONNECTION DIAGRAM.............................................................................................................................................................................................................31
23.14QUICK CONNECTOR.........................................................................................................................................................................................................................................31
24FAILURES..............................................................................................................................................................................................................................................................32
25SPARES LIST........................................................................................................................................................................................................................................................33
26GUARANTEE CONDITIONS............................................................................................................................................................................................................................36

Evolution EV AC
2
1LISTOFCOMPONENTS
1
7
6
2
3
4
5
8
9
7
10
1.- Airdrainvalve.
2.- Domesticsealedburner.
3.- Heatingpump.
4.- Boilertemperaturesensors.
5.- Pressuresensor.
6.- Safetyvalve.
7.- Automaticairvent.
8.- Expansionvessel.
9.- Stainlesssteelcondenser.
10.- Steelbody.

3
2CONTROLELEMENTS
2016 18 1917
1211 151413
11. On/Off pilot light:
When this pilot light comes on, it indicates
that the boiler isswitchedon.
12. Alarm warning pilot light:
When this pilot light flashes, it indicates that an
alarm or boiler functioning cut-out has
occurred.
13. Digital display:
This is the boiler’s main operating display. It
shows the different boiler temperatures, the
installation pressure and the various alarm
codes.
14. Heating pilot light:
When this pilot light is on, it indicates that the
heating mode has been selected, and the boiler
is in wintermode.
15. Hot water pilot light:
When this pilot light is on, it indicates that the
hot water mode has been selected (it will only
light up if an optional storage heater has been
installed with the boiler). When only this pilot
lightison,theboilerisinsummermode.
16. Boiler temperature selector:
The boiler set point temperature can be
selectedatany time. The temperature selector is
a push-in dial button. To use it, push the button
in to release it, and then push it in again to
concealit.
17. On/Off button:
Thisbuttonswitchestheboileronandoff.
18. Set button:
By pressing this button, the different
temperatures of the boiler can be viewed on the
digitaldisplay.
19. Mode select:
This button is for selecting the different boiler
operating modes: heating + hot water (winter
mode), or hot water only (summer mode). The
hot water function can only be selected if an
optionalstorageheaterisinstalledontheboiler.
20. Hot water temperature selector:
This is used to select the hot water set point
temperature at any time (it will only switch on if
an optional storage heater is installed on the
boiler). It is a push-in dial button. To use it, push
the button in to release it, and then push it in
againtoconcealit.

Evolution EV AC
4
3INSTALLATIONINSTRUCTIONS
The boiler must be installed by personnel authorised by the Department of Industry in accordance
with the applicable regulations and standards in force. However, the following recommendations
mustbecompliedwithwheninstallingtheboiler:
3.1 Location
The boiler must be installed in a sufficiently ventilated site. The boiler must be accessible from
above for maintenance,so it must not be installed under a fixed worktop or any other obstacle
preventingaccessfromthetop.
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.
- The condensation pipe must lead to a drain outlet, as the Evolution boiler is a
condensation boiler and a large amount of water may be generated. Also, before starting up
the boiler, it is recommended to fill the condensation outlet tube/siphon with water, so that
thefumesdonotexitthroughthispipe.
3.3 Electrical Connection
The boiler is ready to be connected at 220 V II to terminals 1 and 2 of terminal strip J1 (see Electrical
ConnectionDiagram).Remember to earth the appliance.
The boiler is also provided with two terminals on terminal strip J5 for the room thermostat
connection (see Electrical Connection Diagram). To connect the room thermostat, remove the
bridgejoiningthetwoterminalsandconnecttheroomthermostatinthesameplace.
3.4 Oil Installation
The Evolution boiler is supplied with a Domestic gas-oil burner
(2) (see model in Technical
Characteristics). To install the oil line, proceed in accordance with the burner instructions enclosed
with this manual (see Burner section). The oil line installation and start-up of the burner must be
carriedoutbyqualified,authorisedpersonnel.
3.5 Removal of combustion products
The combustion product exhaustion ducts must be installed by qualified personnel and must
complywithcurrentlegislationandstandards.
Evolution boilers are sealed oil-fired boilers, and the combustion products are therefore removed
throughanoutletpipe,withaseparateairintakefromoutside.
We recommend that the position of the outside exhaustion duct corresponds to the figures and to
thefollowingtable:

5
Exhaustion duct position Minimum distance
(mm)
A underacornice 300
B betweentwohorizontalducts 1000
C fromanadjacentwindow 400
D betweentwoverticalduction 1500
E fromanadjacentventilationgrille 600
F underabalcony(*) 300
G underawindow 600
H underaventilationgrille 600
I fromarecessinthebuilding 300
J fromacornerofthebuilding 300
K fromthefloor 2500
L fromaverticalorhorizontalductoroutlet(**) 300
M from a frontal surface at a distance of 3 metres from the fume outlet 2000
N as above, but with an opening 3000
(*) Providingthewidthofthebalconyisnotover2000mm.
(**)If the materials from which the pipe is made are sensitive to the action of the flue gases, this distance should be
over500mm.
Note: Spanish law also stipulates that the end of the exhaustion duct must be at a distance of no less than 400 mm.
fromanyairintakeopening,andfromthewall.
IMPORTANT: All accessories used for combustion product removal and air intake are to be those
supplied by Domusa.

Evolution EV AC
6
3.6 Installing a Sanit storage heater (Optional)
The procedure for making the correct electrical connection of a Sanit domestic hot water storage
heaterwiththeEvolution EV AC boilerisasfollows:
- Connect a hot water temperature sensor (supplied optionally) to the sensor terminal strip J3
(terminals13and14).Todothis,firstlyremovetheresistor(Ra) which is supplied with the same
(seethe"ConnectionDiagram").
-Insertthetemperaturesensorbulbinthebulbsheathinthestorageheater.
- Connect the storage heater charging pump to the supply terminal strip J2 (terminals 6 and 7)
(seethe“ConnectionDiagram").
To correctly make the hydraulic installation, carefully follow the assembly and connection
instructionsenclosedwiththestorageheater.
3.7 Anti-legionnaire’s disease function (with storage heater only)
When the Sanit storage heater is installed with the Evolution EV AC boiler, the anti-legionnaire’s
disease function can be activatedfor the hot water in the storage heater.
This function must be activated by sufficiently qualified personnel. This is done by changing the
boilermodelselectors,whicharelocatedonthedisplaycardinsidethecontrolpanel.
Before carrying out any operations inside the boiler, switch off the electrical supply to the
appliance. To activate the anti-legionnaire’s disease function, remove the top cover from the boiler
and use a screwdriver to remove the cover of the control panel box, removing the two screws
holding it in place. The electronic display board can then be accessed, where the programming
selectorsarelocated.
The anti-legionnaire’s disease function is selected by turning selector nº 4 to ON position (see
“ElectricalDiagram").
3.8 Installing the Underfloor Heating Kit SRAC2/EV (Optional)
The procedure for correctly making the electrical connection between the Underfloor Heating Kit
SRAC2/EVandtheEvolution EV AC boilerisasfollows:
- Connect a flow temperature sensor (supplied with the kit) to the sensor terminal strip J3
(terminals 12 and 13). To do this, firstly remove the resistor (Rr) supplied with the same (see the
“ConnectionDiagram").
-Mountthetemperaturesensorbulbinaccordancewiththeinstructionsenclosedwiththekit.
- Connect the heating pump to the supply terminal strip J2 (terminals 8 and 9) (see the
“ConnectionDiagram").
- Connect the 3-way mixing valve motor to the supply terminal strip J2 (terminals 10 and 11) (see
the“ConnectionDiagram").
To correctly make the hydraulic installation, carefully follow the assembly and connection
instructionsenclosedwiththekitSRAC2/EV.

7
4REMOVALOFCOMBUSTIONPRODUCTS
4.1 ø80 Combustion product exhaustion and air intake dual duct system (type C53)
For this type of boiler, the removal of combustion products and air intake take place through
separate Ø80 mm. dual ducts. The Ø80 dual duct outlet kit, code CGAS000186, is used for this
purpose. This isthe type of fume removalprovidedfor Evolution boilersbydefault.
The maximum length of piping that can be installed is 20 metres, as the maximum sum of the
metres of the air intake duct and the metres of the combustion product exhaustion duct. Each 90º
elbow,oreachtwo45ºelbows,willreducetheavailablelengthby1m.
It is recommended that the exhaustion duct be fitted in a slightly upwardly-inclined direction, at
around2º-3º,thuspreventinganywaterandcondensationfromdrippingout.
Dual exhaustion ductkit
∅
80
Code CGAS000186
1mduct
∅
80
Code
90º elbow ∅80
Code CGAS000147
45º elbow ∅80
Code CGAS000148
Examplesofinstallation:
L ≤20 mts.

Evolution EV AC
8
4.2 Changing from dual duct fume removal to coaxial fume removal
The Evolution boiler has a Ø80 dual duct system for the removal of combustion products and air
intake. If youprefer the removal of combustion products to be made bymeans of a Ø80/125 coaxial
tube,youmayusetheØ80/125coaxialtubeadaptorkit(suppliedtoorder),code CGAS000213.
Adaptor for coaxial pipe
∅
80/125
Code CGAS000213
Thechangeovermaybemadewithtwodifferentassemblyconfigurations:
1. Rear outlet: simply remove the combustion air intake from the boiler, unscrewing the three
screws holding it in place, mount the adaptor on the fume outlet towards the rear, and use the
flexibleairinlettubetoconnectittotheadaptor.
2. Side or top outlet: the procedure is the same, but to mount the adaptor kit laterally a 90º Ø80
elbow(codeCGAS000147)needstobefittedbeforetheadaptoratthefumeoutlet.
Thetwo configurations are shown in the figures below:
Toma de aire de combustión
Salida hacia atrás Salidalateral
Codo 90º Ø80
Combustion air intake
Side outletRear outlet
Elbow
Adaptor for coaxial pipe ∅80/125
CodeCGAS000213

9
4.3 ø80-125 concentric horizontal duct for removal of combustion products and air intake (type
C13)
The removal of combustion products and air intake can be made using concentric Ø80 mm ducts
for the removal of combustion products and Ø125 mm ducts for the air intake, using the 1m Ø80-
125horizontalductkit,codeCGAS000189.
The maximum length from the boiler for horizontal ducts, including the kit terminal, is 10 metres.
Each90°elbow,ortwo45°elbows,willreducetheavailablelengthby1metre.
It is recommended that the pipe be fitted in a slightly upwardly-inclined direction, at around 2º - 3º,
topreventanywaterorcondensationfromdrippingout.
Kitsalida horizontal 1m
∅
80/125
Cod. CGAS000189
Curva 90º coaxial ∅80/125
Cod. CGAS000182
Curva 45º coaxial ∅80/125
Cod. CGAS000183
Tubo1m coaxial∅80/125
Cod. CGAS000184
Examplesofinstallation:
L ≤10 mts.
1mø80/125horizontalductkit
CodeCGAS000189
ø80/12590ºcoaxialcurve
CodeCGAS000182
ø80/12545ºcoaxialcurve
CodeCGAS000183
1mø80/125coaxialduct
CodeCGAS000184

Evolution EV AC
10
4.4 ø80-125 concentric vertical duct for removal of combustion products and air intake (type C33)
The removal of combustion products and air intake can be made using concentric Ø80 mm ducts
for the removal of combustion products and Ø125 mm ducts for the air intake, using the Ø80-125
verticalductkit,code CGAS000231.
The maximum length from the boiler for vertical ducts, including the kit terminal, is 12 metres.
Each90°elbow,ortwo45°elbows,willreducetheavailablelengthby1metre.
Vertical outletkit∅80/125
Cod. CGAS000231 Black tile
∅
80/125
Cod. CGAS000074
45º curve
∅
80/125
Cod.CGAS000183 90º curve
∅
80/125
Cod. CGAS000182
1m coaxial tube∅80/125
Cod. CGAS000184
Blacktile ∅80/125
Cod. CGAS000075
Examplesofinstallation:
L ≤12 mts.

11
5FILLINGTHEINSTALLATION
A fill valve for filling the installation is to be provided for. The installation should be filled up using this
valve until a pressure of 1 - 1.5 bar appears on the left side of the digital display. Filling is to be done
slowly and with the cap of the automatic air drain valve (7) loose, so that the air is released from the
installation. The rest of the installation is also to be suitably drained using the air drain valves fitted for
thispurpose.Oncetheinstallationhasbeenfilled,closethefillingvalve.
Evolution boilers incorporate a pressure sensor (5) , which controls the pressure of the installation. If
the installation drops below the minimum pressure of 0.5 bar, the boiler will not switch on and a low
pressurealarmwillappearonthedisplay("AP").
NOTE: Switching on the boiler with no water inside could result in serious damage.
6DIGITALDISPLAY
The Evolution boiler is electronic and incorporates a digital display (13) showing the actual
temperatures, the set point temperatures and the pressure of the installation. When the display is on
standby, the pressureis indicated on the leftside of the display (in bars), and the actual temperature of
the boiler on the right of the display (in ºC). By pressing the set button underneath the display, the rest
oftheavailabledisplayoptionscanbebrowsed,asfollows:
Set button
Digital display
1.5
63
Press the set button successively to select the different display options. When the desired option
hasbeenselected,itwillreturntostandbyaftertensecondshaveelapsed.
Thefollowingtableshowsthedifferentdisplayoptions:
1.5 63
bar ºC
Standby. The pressure is shown on the left, and the actual boiler
temperature on the right.
T 1 63 Actual boiler temperature.
T2 45 Actual hot water temperature (with storage heater).
T3 35 Actual flow temperature of the underfloor heating installation.
(option SRAC2/EV only)
TC 70 Boiler temperature selected using the corresponding dial
(16) .
A( 45 Hot water temperature selected using the corresponding dial
(20)
(with storage heater).
TR 35 Set point flow temperature for the underfloor heating installation
selected using the corresponding dial
(16) .
(option SRAC2/EV only)
SP 1.5 Actual boiler pressure, measured by the Pressure Sensor
(5) .

Evolution EV AC
12
7TEMPERATURESELECTION
7.1 Selecting the boiler set point temperature
TC 70
/
The desired boiler operating temperature is selected using the push-in button, as shown in the
picture. Press the button down gently to release it. To press it back in again, push the button until it
locks. The push-in button is turned to select the desired temperature.
"tc" will appears on the
display and you can view the selected set point temperature. When you have selected the
temperature,pushthebuttoninagain.Thedisplaywillreturntostandbystatusaftertenseconds.
The boiler set point temperature can also be selected by browsing with the set button until the
"tc"
option appears on the display. When it appears, turn the push-in button to select the desired
temperature.
The boiler set point temperature range that can be selected is 30 - 85 ºC. Model Evolution boilers
are condensing boilers, and so in order to obtain maximum boiler performance and energy savings,
it is therefore recommended to select a set point temperature of 55 - 70 ºC, providing the heating
systeminstalledandtheinsulationconditionsofyourhomepermitthis.
7.2 Selecting the hot water set point temperature (with storage heater only)
A( 45
/
The desired hot water temperature is selected using the push-in button, as shown in the picture.
Press the button down gently to release it, and to press it in again, push the button until it locks.
To select the desired temperature, turn the push-in button. "AC" will appear on the display and
the selected set point temperature can be viewed. When you have selected the temperature,
push the button in again. The display will return to standby status after ten seconds. The hot
watersetpointtemperaturerangepermittedis15-60ºC.
The hot water set point temperature can also be selected by browsing with the set button until
the option "AC" appears. When this option appears on the display, turn the push-in button to
selectthedesiredtemperature.

13
7.3 Selecting the underfloor heating outlet set point temperature (with SRAC2/EV kit option)
TR 35
/
When the boiler is installed with the optional underfloor heating kit, SRAC2/EV, the desired flow
temperature of the installation can be selected using the push-in button as shown in the figure
above. Press the button down gently to release it, and to press it in again, push the button until it
locks.Toselectthedesiredtemperature, turn the push-in button.
"tr" will appear on the display and
you will see the set point temperature selected. When you have selected the temperature, push the
buttoninagain.Thedisplaywillreturntostandbystatusaftertenseconds..
The installation flow set point temperature can also be selected by browsing with the set button
until
“tr” appearsonthedisplay.Thenturnthepush-inbuttontoselectthedesiredtemperature.
The set point temperature range that can be selected is 0 - 45 ºC. To obtain optimum performance
from the underfloor heating system, we recommend selecting a set point temperature of 25 - 35 ºC,
providingtheheatingsysteminstalledandtheinsulationinyourhomepermitthis.
8FUNCTIONING
The Evolution EV AC boiler is supplied by default in “heating only” mode, for a heating installation
only. Optionally, a domestic hot water storage heater (Sanit) and/or an underfloor heating kit
(SRAC2/EV)maybeinstalled,providing the installation with more features.
8.1 Functioning in “Heating Only” mode
1.5 63
In this mode, the desired set point temperature for the boiler should be selected, and the
temperature of the room thermostat or E20 remote control (if the appliance is equipped with
these). The burner and the heating pump will begin to function until the selected set point
temperature of the boiler is reached in the installation (or on the room thermostat, if the appliance
is equipped with one). When the temperature of the installation drops below the boiler
temperatureselected,theburnerwillstarttheheatingcycleupagain.

Evolution EV AC
14
8.2 Functioning with Sanit storage heater (Optional)
The Evolution EV AC boiler may be installed together with a storage heater from the DOMUSA
Sanit range, to obtain domestic hot water. For correct installation, follow carefully the assembly
andreadcarefullythe"Installationinstructions"sectionofthismanual.
There are two different modes of functioning. They can be selected using the mode selection
button, as shown in the figures. The selection is indicated by the two mode pilot lights on the right
ofthedisplay.
1.5 63
/
Winter mode
In this mode, the boiler can heat up the heating installation and produce hot water at the same
time. To select this mode, press the mode selection button until the two pilot lights (14) (15)
come on. The burner and hot water pump will switch on. When the storage heater reaches the
hot water set point temperature selected, it is ready to heat up the heating installation,
switching on the heating pump and switching off the hot water pump. The burner stops when
the boiler reaches the boiler set point temperature selected. When the room temperature
reaches the temperature adjusted on the installation room thermostat (if there is one), the
heatingpumpwillswitchoff.
Summer mode
In this mode, the boiler will provide hot water only. To select this mode, press the mode
selection button until the bottom pilot light comes on ( 15 ). The burner and hot water pump
will be switched on until the storage heater reaches the selected hot water set point
temperature.
8.3 Functioning with the Underfloor Heating Kit SRAC2/EV (Optional)
The Evolution EV AC boiler may be installed together with an underfloor heating kit, SRAC2/EV.
This kit basically consists of a motorised 3-way mixing valve and an underfloor heating installation
flow temperature sensor. To correctly install it, carefully follow the assembly and connection
instructionsenclosedwiththekit.
The underfloor heating installation is worked by the electronic boiler control. The temperature is
adjusted by means of the installation flow sensor, selecting the flow temperature using the boiler
adjustment control dial on the control panel. It may be adjusted between 0 and 45 ºC. In this
operating mode, the boiler set point temperature is set by the electronic control at 75ºC by default,
and the installation flow temperature can be adjusted to the set point temperature selected by
workingthemixingvalve.

15
TC 75
/
The boiler set point temperature can be changed by browsing with the set button until the option
“tc” appears on the display. When it appears, push the set button in and hold it down for 5
seconds,untilthesymbol "tc" begins to flash.Then push the set button successively to increase the
boiler set point temperature. When the desired temperature has been selected, push the set button
and hold it down for 5 seconds again, until it stops flashing. The value selected will be stored in the
memory.
9ADDITIONALFUNCTIONS
The Evolution EV AC boiler is equipped with an electronic control for efficiently regulating automatic
boileroperation.Italsoincludesthefollowingadditionalcontrolfeatures:
9.1 Pump anti-block function
This feature prevents the boiler circulation pumps from blocking if the pumps have not been
started up for a long period of time. This system remains enabled while the boiler is plugged into
themains.
9.2 Anti-frost function
This function protects the boiler from freezing up during cold weather. If the boiler temperature
drops to below 6 ºC, the heating circulation pump will start up. If the boiler temperature continues
to drop and reaches 4 ºC, the burner will start up, heating the installation. When this function has
been activated, it will remain active until the boiler reaches 8 ºC. This system remains on standby
whiletheboilerispluggedintothemains.
9.3 Boiler pressure sensor function
This function prevents boiler failure due to a low water level and excess pressure in the boiler. The
pressure is detected by a pressure sensor (5) ,and its value appears on the control panel display. If
the pressure drops below 0.5 bar, the electronic control switches off the boiler and activates an
alarm on the display. When the boiler pressure reaches 2.5 bar, an alarm pilot light (12) begins to
flash to warn that the pressure is too high. In this case we recommend calling the Technical
Assistance Service,andtopartiallydraintheboiler.
9.4 Telephone relay connection
The Evolution boiler is designed to enable a phone relay to be connected for switching the boiler
on and off. This feature allows the boiler to be switched on and off remotely, from any location, by
means of a phone call. The relay is connected to the boiler via terminal strip J6 (see Electrical
Connection Diagram). When the phone relay contact closes, the boiler switches on, and when the
relay is open, it switches off, with the anti-frost protection and pump anti-block functions
remainingactivated.

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9.5 Room thermostat connection
The boiler has two terminals on terminal strip J5 for connecting a room thermostat or room timer
(see Electrical Connection Diagram). This allows the heating mode to switch off according to the
room temperature. To connect it, remove the bridge from terminal strip J5 and connect the room
thermostatinthesameplace.
Installing a room thermostat will optimise the functioning of the installation, 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 (room timer), it will be able to adapt the heating
systemtothehoursduringwhichtheinstallationisinuse.
9.6 Anti-legionnaire’s disease function (optional) (with storage heater only)
This optional function prevents the bacteria causing legionnaire’s disease from proliferating in the
hot water accumulated in the storage heater. Every 7 days, the temperature of the water in the
storage heater is raised to 70 ºC to kill any such bacteria. This function will only be activated when
the boiler is functioning,with the master switch turned to “I”.
The boiler is supplied with this function deactivated. To enable the function, read the section
"Installation Instructions" carefully. We recommend that the operation for enabling this function is
carriedoutbyqualifiedpersonnel.
10E20REMOTECONTROL(OPTIONAL)
Together with the Evolution EV AC boiler, a remote control (E20) can optionally be supplied. This
remotecontrolcanbeusedtofullyoperatetheboilerfromanylocationwithinthehome.
The remote control enables the hours of home comfort to be programmed, adjusting the installation
to the particular requirements of the home by measuring the room temperature and consequently
adapting the installation temperature. The remote control can also be used to adjust the hot water
and heating set point temperatures (storage heater option) at any time, and for viewing the different
boileroperationparameters.Italsowarnsofanyfunctioninganomaliesaffectingtheboiler.
The E20 remote control may optionally be connected to an external sensor, for measuring the outside
temperature. With this option installed, the remote control can adjust the home comfort level
depending on the weather conditions at each particular moment, optimising fuel consumption and
theheatinginsidethehome.
When an E20 remote control is connected to the boiler, the control of the boiler is performed
exclusively by the remote control. The different boiler temperatures that can be selected will need to
be changed using the remote control. It is easy to install, only needing 2 wires for communication
between the boiler and the E20 control. It is connected to the boiler by connecting the two wires on
terminal strip J4 (see Connection Diagram). For correct installation and functioning, carefully read the
instructionsenclosedwiththeremotecontrol.
The following sections contain a general explanation of the different operating modes and options of
theE20remotecontrol.

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10.1 Functioning without an external sensor
Conventional heating installation (direct circuit)
The maximum temperature for the heating circuit, hours of heating and room temperatures
desired can be selected on the remote control. The E20 will calculate the boiler temperature
necessary at each particular time, depending on the temperature inside the home, and it will
switch the heating on and off according to the heating times and room temperatures
programmed.
Installing heating with an underfloor heating kit SRAC2/EV (mixed circuit)
If the boiler has an underfloor heating kit SRAC2/EV installed, the adjustment and control of the
underfloor heating is made via the boiler control panel (see "operation with underfloor heating
kit").
The E20 remote control can be used to programme the desired heating times and room
temperatures.
10.2 Functioning with an external sensor (Optional)
If an external temperature sensor is connected to the E20 remote control, the E20 can calculate the
heating installation mode temperature in accordance with the outside weather conditions at each
particular time, with optimum adjustment of the heating installation conditions for increased home
comfortandenergysavings.
Conventional heating installation (direct circuit)
The maximum temperature and an operating curve for the heating circuit, the heating times and
the room temperatures desired can be selected on the remote control (see instructions enclosed
with the E20 remote control). The E20 will calculate the boiler temperature necessary at each
particular time, depending on the temperature inside the home and the weather conditions
outside, in accordance with the operating curve selected (parameter CURVE 1 on the E20),
switching the heating on and off in accordance with the heating times and the room
temperaturesprogrammed.
Installing heating with the underfloor heating kit SRAC2/EV (mixed circuit)
If the boiler has an underfloor heating kit SRAC2/EV installed and the control of this circuit is
activated on the E20 remote control, using the parameter CURVE 2 (see instructions enclosed
with the E20 remote control), the adjustment and control of the underfloor heating circuit flow
temperature will be performed by the remote control. The E20 will calculate the flow
temperature necessary at each particular time, depending on the temperature inside and
outside the home, in accordance with the operating curve selected (parameter CURVE 2 on the
E20 remote control). For mixed underfloor heating circuits, we recommend selecting operating
curvesofunder0.8.
The boiler set point temperature will be fixed at 75 ºC and may be changed via the boiler control
panel. To change this setting, browse with the set button until the option “tc” appears on the
display. When it appears, press the set button and hold it down for 5 seconds until the "tc"
symbol begins to flash. If the set button is pressed successively, the boiler set point temperature
will gradually increase. When the desired temperature has been selected, press the set button
and hold it down for 5 seconds again until it stops flashing. The value selected will be stored in
thememory.
The E20 remote control can also be used to selected the maximum heating circuit flow
temperature and programme the desired heating times and room temperature. The E20 remote
control will switch the heating on and off according to the heating times and room
temperaturesprogrammed.

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NOTE: For mixed underfloor heating circuits, we recommend selecting a maximum flow
temperature of NO HIGHER THAN 45 ºC, in order to protect the underfloor heating
installationfromoverheating.
10.3 Functioning with a domestic hot water storage heater (Optional)
When the boiler is installed with a connected hot water supply storage heater, the E20 remote
control can be used to select up to 2 hot water temperatures and the hot water times desired. The
E20 remote control will adjust the hot water temperature of the storage heater at each particular
timeandswitchthehotwateronandoffinaccordancewiththetimesprogrammed.
The E20 remote control also has an option for activating an anti-legionnaire’s disease bacteria
function(seeinstructionsenclosedwiththeE20remotecontrol).
10.4 Telephone relay function
The E20 remote control is designed to be connected to an external telephone relay. If a telephone
relay is connected to it, the heating and hot water can be switched on and off from any location
anywhere in the world, by making a telephone call (see instructions enclosed with the E20 remote
control).
11SAFETYCUT-OUTSYSTEMS
The boiler electronic control system may activate the boiler safety cut-out system, as shown below.
When any of the cut-outs are activated, the boiler will switch off, an alarm code will flash on the
displayandtheredalarmwarningpilotlightwillstarttoflash.
AL AT
If any of the cut-outs below should occur repeatedly, switch off the boiler and call your nearest
official technical assistance service.
11.1 Temperature safety cut-out
When this cut-out occurs, the code "At" (temperature alarm) will
begin to flash on the digital display (13) and the alarm warning
pilot light will flash on the control panel. The burner will switch
offandstopheatingtheinstallation.
This occurs when the boiler exceeds a temperature of 110 ºC. To unblock it, wait until the boiler
drops to below 100 ºC and press the button on the safety thermostat, located inside the boiler on
the underside ofthe electric box, after firsthavingremovedthebuttoncover.
11.2 Burner cut-out
When this cut-out occurs, the code "AQ" (burner alarm) will
begin to flash on the digital display
(13) and the alarm warning
pilot light will flash. The burner will switch off and stop heating
theinstallation.
This occurs as a result of an anomaly in the burner (2) or in the
fuelinstallation.Tounblockit,presstheilluminatedbuttonthatlightsupontheburner.
AL AT
bar ºC
AL AQ
bar ºC