DOMUSA TEKNIK EVOLUTION EV HAC Series User manual

INSTALLATION AND OPERATING INSTRUCTIONS
EVOLUTION EV HAC
ER-0170/1996
CGM-04/392

Thank you for choosing a DOMUSA TEKNIK heating boiler. Fro the
range of DOMUSA TEKNIK products you have chosen the Evolution
EV HAC odel. With a suitable hydraulic installation, this oil-fired
boiler will provide the ideal level of co fort for your ho e.
This anual for s an essential part of the product and it ust be
given to the user. Read the warnings and reco endations in the
anual carefully, as they contain i portant infor ation on the safety,
use and aintenance of the installation.
These boilers are to be installed by skilled personnel only, in
accordance with the legislation in force and following the
anufacturer’s instructions.
The start-up of these boilers and any aintenance operations ust
only be carried out by DOMUSA TEKNIK’s Authorised Technical
Assistance Services.
Incorrect installation of these boilers could result in da age to people,
ani als or property, and the anufacturer will hold no liability in such
cases.
DOMUSA TEKNIK infor s all parties concerned that, in co pliance
with section 1 of the first additional provision of Law 11/1997, the
responsibility for delivering packaging waste or used packaging for its
proper environ ental anage ent 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 ust be taken to a selected collection point for
electrical and electronic equip ent or ust be returned to the
distributor at the ti e of purchasing a new equivalent appliance. For
ore detailed infor ation on the collection sche es available, contact
either the collection facilities of the local authority or the distributor
where the purchase was ade.

1
INDEX Page
1 DESCRIPTION OF COMPONENTS........................................................................................................................................................................2
2 CONTROL ELEMENTS...........................................................................................................................................................................................3
3 INSTALLATION INSTRUCTIONS............................................................................................................................................................................5
3.1 LOCATION...............................................................................................................................................................................................................5
3.2 HYDRAULIC INSTALLATION........................................................................................................................................................................................5
3.3 ELECTRICAL CONNECTION........................................................................................................................................................................................5
3.4 OIL INSTALLATION ...................................................................................................................................................................................................5
3.5 COMBUSTION PRODUCTS EXHAUSTION.......................................................................................................................................................................6
3.1 INSTALLING A SANIT HOT WATER TANK (OPTIONAL).....................................................................................................................................................7
3.2 ANTI-LEGIONELLA FUNCTION (WITH HOT WATER TANK ONLY)........................................................................................................................................7
3.3 INSTALLING THE SRAC2/EV UNDERFLOOR HEATING KIT (OPTIONAL)...........................................................................................................................8
3.4 INSTALLING HEATING CIRCUIT 2(OPTIONAL)...............................................................................................................................................................9
4 COMBUSTION PRODUCTS EXHAUSTION..........................................................................................................................................................10
4.1 COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE DUAL-DUCT DEVICE Ø80 (TYPR C
53
)...........................................................................................10
4.2 DOUBLE CONDUIT TO COAXIAL EXHAUSTION TRANSFORMATION...................................................................................................................................11
4.3 COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE HORIZONTALLY-ARRANGED COAXIAL DEVICE Ø80-125 (TYPE C
13
).................................................12
4.4 COMBUSTION PRODUCTS EXHAUSTION AND AIR INTAKE VERTICALLY-ARRANGED COAXIAL DEVICE Ø80-125 (TYPE C
33
)......................................................13
5 FILLING THE INSTALLATION...............................................................................................................................................................................14
6 DIGITAL DISPLAY ................................................................................................................................................................................................14
7 TEMPERATURE SELECTION...............................................................................................................................................................................16
7.1 SELECTING THE BOILER SET POINT TEMPERATURE.....................................................................................................................................................16
7.2 SELECTING THE DHW SETPOINT TEMPERATURE (WITH HOT WATER TANK ONLY)..........................................................................................................16
7.3 SELECTING THE UNDERFLOOR HEATING FLOW SETPOINT TEMPERATURE (WITH SRAC2/EV KIT OPTION)........................................................................17
8 OPERATION.........................................................................................................................................................................................................17
8.1 FUNCTIONING IN “HEATING ONLY”MODE..................................................................................................................................................................17
8.2 FUNCTIONING WITH A SANIT HOT WATER TANK..........................................................................................................................................................18
8.3 HEATING CIRCUIT 2FUNCTIONING (OPTIONAL)..........................................................................................................................................................18
8.4 FUNCTIONING WITH AN SRAC2/EV UNDERFLOOR HEATING KIT (OPTIONAL)...............................................................................................................18
9 ADDITIONAL FUNCTIONS....................................................................................................................................................................................19
9.1 PUMP ANTI-BLOCK FUNCTION..................................................................................................................................................................................19
9.2 ANTI-FROST FUNCTION...........................................................................................................................................................................................19
9.3 BOILER PRESSURE SENSOR FUNCTION.....................................................................................................................................................................19
9.4 TELEPHONE RELAY CONNECTION.............................................................................................................................................................................19
9.5 ROOM THERMOSTAT CONNECTION...........................................................................................................................................................................19
9.6 ANTI-LEGIONELLA FUNCTION (OPTIONAL)(WITH HOT WATER TANK ONLY).....................................................................................................................19
9.7 KEYPAD BLOCK FUNCTION ......................................................................................................................................................................................20
10 E20 REMOTE CONTROL (OPTIONAL)...............................................................................................................................................................20
10.1 FUNCTIONING WITHOUT AN OUTDOOR SENSOR .......................................................................................................................................................21
10.2 FUNCTIONING WITH AN EXTERNAL SENSOR (OPTIONAL)...........................................................................................................................................21
10.3 FUNCTIONING WITH A DHW TANK (OPTIONAL)........................................................................................................................................................22
10.4 TELEPHONE RELAY FUNCTION...............................................................................................................................................................................22
11 SAFETY CUT-OUTS ...........................................................................................................................................................................................23
11.1 TEMPERATURE SAFETY CUT-OUT...........................................................................................................................................................................23
11.2 BURNER CUT-OUT ...............................................................................................................................................................................................23
11.3 LOW PRESSURE CUT-OUT.....................................................................................................................................................................................23
12 DRAINING THE BOILER.....................................................................................................................................................................................24
13 SHUTTING DOWN THE BOILER........................................................................................................................................................................24
14 FIRST START-UP ...............................................................................................................................................................................................24
15 INSTALLATION DELIVERY.................................................................................................................................................................................24
16 BOILER MAINTENANCE.....................................................................................................................................................................................25
16.1 CLEANING THE BOILER .........................................................................................................................................................................................25
16.2 ANTI-FROST PROTECTION.....................................................................................................................................................................................26
16.3 BOILER WATER CHARACTERISTICS.........................................................................................................................................................................26
17 TECHNICAL DATA..............................................................................................................................................................................................27
18 CIRCULATING PUMP FLOW CURVES ..............................................................................................................................................................28
18.1 CHARACTERISTIC CURVES OF THE PUMP ................................................................................................................................................................28
18.2 REGULATION OF THE CIRCULATION PUMP ...............................................................................................................................................................28
18.3 PRESSURE DROP.................................................................................................................................................................................................28
19 DIAGRAMS AND MEASUREMENTS ..................................................................................................................................................................29
20 ELECTRICAL CONNECTION DIAGRAM.............................................................................................................................................................29
21 ELECTRICAL DIAGRAM.....................................................................................................................................................................................30
22 ALARM CODES ..................................................................................................................................................................................................31
23 BURNER.............................................................................................................................................................................................................32
23.1 ASSEMBLY..........................................................................................................................................................................................................32
23.2 BURNER START-UP ..............................................................................................................................................................................................32
23.3 ADJUSTING THE COMBUSTION CONDITIONS.............................................................................................................................................................32
23.4 OIL PRESSURE ADJUSTMENT.................................................................................................................................................................................34
23.5 PIPE OPERATION .................................................................................................................................................................................................34
23.6 OIL SUPPLY PIPING DIAGRAMS...............................................................................................................................................................................35
23.7 TECHNICAL SPECIFICATIONS .................................................................................................................................................................................35
23.8 OPERATING CURVES............................................................................................................................................................................................36
23.9 NOZZLES............................................................................................................................................................................................................36
23.10 OIL FLOW VERSUS NOZZLE AND PUMP PRESSURE..................................................................................................................................................36
23.11 ELECTRICAL CONNECTION DIAGRAM.....................................................................................................................................................................37
23.12 QUICK CONNECTOR ...........................................................................................................................................................................................38
23.13 BURNER CONTROL OPERATING SEQUENCE ...........................................................................................................................................................39
24 SPARE PARTS LIST...........................................................................................................................................................................................40
25 FAILURES...........................................................................................................................................................................................................43
26 WARRANTY CONDITIONS.................................................................................................................................................................................45

Evolution EV HAC
2
1DESCRIPTION OF COMPONENTS
1
2
4
5
6
7 8 9
7
10
1.- Air drain valve.
2.- Do estic sealed burner.
.- Heating pu p.
4.- Boiler te perature sensors.
5.- Safety valve.
6.- Pressure sensor.
7.- Auto atic air vent.
8.- Expansion vessel.
9.- Stainless steel condenser.
10.- Steel body.

2 CONTROL ELEMENTS
1
2
1
4
15
1
3
16
1
1
18
17
11. Digital display:
This is the boiler functioning display, on which
all the operating infor ation, settings and
values appear. In standard operating ode
(default display), the actual boiler te perature
is shown. If any alfunctioning should occur,
the corresponding alar code will appear on
the digital display.
12. Boiler temperature touch button:
This is used to select the boiler setpoint
te perature. If oFF is selected, the heating
function is disabled. To select the desired
te perature, si ply place your finger on the "+"
or "-" sy bols on the touch button to increase
or decrease the desired boiler te perature.
1 . MODE touch button:
When this button is touched the different boiler
te peratures appear on the digital display.
14. ON touch button:
If you place your finger on this button for 1
second the boiler will switch on or off.
15. RESET touch button:
If the boiler is in lock-out ode as the alar has
been triggered, touch the RESET button to reset
the lock-out and restore functioning. If you are
odifying any of the settings or browsing the
user enu, you ay touch the RESET button to
exit the enu WITHOUT SAVING and return to
the previous enu level.
16. DHW temperature touch button:
This button can be used to select the desired
do estic hot water te perature (only if a DHW
tank is connected to the boiler). If oFF is
selected, the DHW function will be disabled. To
select the desired te perature, si ply place
your finger on the "+" or "-" sy bols on the
touch button to increase or decrease the
desired DHW te perature.
17. Boiler safety thermostat:
This is a cut-out echanis to ensure the boiler
te perature does not exceed 110ºC.
18. Fume safety thermostat:
This safety ther ostat operates when the
te perature of the co bustion products
exceeds 110ºC, in order to protect the
polypropylene duct.

5
INSTALLATION INSTRUCTIONS
The boiler ust be installed by personnel authorised by the Depart ent of Industry in accordance
with the applicable regulations and standards in force. However, the following reco endations
ust be co plied with when installing the boiler:
.1 Location
The boiler ust 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 aintenance operations. It ust therefore not be
installed under a fixed worktop or any other obstacle preventing access.
.2 Hydraulic Installation
The hydraulic installation ust be ade by qualified personnel. The applicable installation
legislation is to be co plied with, and the following reco endations should also be taken into
account:
- The inside of the installation piping should be thoroughly cleaned before switching on the
boiler.
- We reco end inserting cut-off valves between the installation piping and the boiler to
si plify aintenance tasks.
-The hose connected to the pressure relief valve is installed on a provisional basis.
The discharge pipes should be fitted in accordance with the current edition of the
Building Regulations.
- Before starting up the unit, it is essential to install the condensation siphon supplied with the
boiler docu entation on the condensation drain tube
on the back of the boiler.
- The condensation pipe should lead to a drain outlet,
as the Evolution boiler is a condensation boiler and a
large a ount of water ay be generated. This
connection should be ade in accordance with the
regulations for draining off condensation water to the
drain network.
- Fill the siphon with water before starting up the unit, to
prevent fu es co ing out of it.
. Electrical Connection
The boiler is equipped for connection at 230 V~, 50 Hz to ter inals 1 and 2 of ter inal strip J1 (see
“ Electrical Connection Diagra ”). Remember to earth the appliance.
The boiler has two ter inal strips, TA
1
(J5) and TA
2
(J7) for connecting roo ther ostats or roo
chronother ostats (see “ Electrical Connection Diagra ”) for re ote control of heating circuits 1
and 2 respectively. To correctly connect the roo ther ostats, firstly re ove the bridge joining the
ter inals of ter inal strip TA
1
. For connection to TA
2
, si ply connect the ther ostat to the
ter inal strip.
.4 Oil Installation
The Evolution boiler is supplied with a Domestic gas-oil burner
(2)
(see odel in Technical
Characteristics). To install the oil line, proceed in accordance with the burner instructions enclosed

Evolution EV HAC
6
with this anual (see Burner section). The oil line installation and start-up of the burner ust be
carried out by qualified, authorised personnel.
.5 Combustion products exhaustion
The installation of exhaustion of the products of co bustion has to be carried out by qualified
personnel staff and it will fulfill the require ents de anded in the legislation and effective
regulatory sche es.
The Evolution boilers are balanced flue oil boilers, so that the co bustion products exhaustion is
carried out by eans of an outlet duct and an air intake fro outside. It is reco ended that the
position at the exhaustion duct exterior portion should be in accordance with the data of the
following figures and table:
Position of the exhaustion duct Minimum distance
mm
A under a cornice 300
B between two horizontally-arranged ducts 1000
C fro a next window 400
D between two vertically-arranged ducts 1500
E fro a next venting grid 600
F under a balcony (*) 300
G under a window 600
H under a venting grid 600
I fro a break back of a building 300
J fro an angle of a building 300
K fro the floor level 2500
L fro a vertically/horizontally-arranged outlet or pipe (**) 300
M fro a front surface at a distance of 3 etres fro the exhaust gas outlet 2000
N like the previous one, but with opening 3000
(*) In so far the balcony width does not exceed 2000 .
(**) If the pipe constructive aterials were sensitive to the action fro the flue gases, this distance should be longer
than 500 .
ATTENTION: All the fittings used in the combustion products exhaustion and air intake are to be those
supplied by Domusa Teknik firm.

7
.1 Installing a Sanit hot water tank (Optional)
The procedure for suitably connecting a Sanit DHW tank to the Evolution EV HAC boiler is as
follows:
- Unplug the boiler from the mains.
- Connect a DHW te perature sensor (supplied optionally) to sensor ter inal strip J (ter inals
16 and 17), first re oving the resistance (Ra) supplied by default (see "Electrical Connection
Diagra ").
- Insert the te perature sensor bulb in the bulb-holder sheath provided on the hot water tank.
- Connect the hot water tank feed pu p to the supply ter inal strip J2 (BV; ter inals N and 5)
see “Electrical Connection Diagra ").
For correct hydraulic installation, carefully follow the asse bly and connection instructions
enclosed with the hot water tank.
.2 Anti-legionella function (with hot water tank only)
The Evolution EV HAC boiler with a Sanit hot water tank installed has a legionella prevention
function that can be enabled for the do estic hot water in the tank.
This function ust be activated by sufficiently qualified personnel. The function is enabled by
changing the boiler odel selectors on the display card inside the control panel.
Before carrying out any work on the inside of the boiler, unplug it fro the ains. To activate the
anti-legionella function, re ove the top cover of the boiler then re ove the lid of the control panel
box using a screwdriver to re ove the two screws holding it in place. When this cover has been
re oved the electronic circuit board of the display, containing the progra ing switches, can be
accessed.
Select the anti-legionella function by turning selector 4 to ON (see "Electrical Diagra ").

Evolution EV HAC
8
. Installing the SRAC2/EV Underfloor Heating Kit (Optional)
The procedure for suitably connecting the SRAC2/EV Underfloor Heating Kit to the Evolution EV
HAC boiler is as follows:
- Unplug the boiler from the mains.
- Connect a flow te perature sensor (supplied with the kit) to sensor ter inal strip J (ter inals
15 and 16), first re oving the resistance (Rr) supplied by default (see “Electrical Connection
Diagra ").
- Fit the te perature sensor bulb according to the instructions enclosed with the kit.
- Connect the heating pu p to supply ter inal strip J2 on the circuit 1 pu p connection (pu p
BC
1
; ter inals N and 7) (see “Electrical Connection Diagra ").
- Connect the PWM
C
cable to sensor ter inal strip J (ter inals 13 and 14) (see “Electrical
Connection Diagra ").
- Connect the 3-way ixer valve otor to supply ter inal strip J2 (ter inals N, 8 (+) and 9 (-))
(see “Electrical Connection Diagra ").
For correct hydraulic installation, carefully follow the asse bly and connection instructions
enclosed with the SRAC2/EV kit.

9
.4 Installing heating circuit 2 (Optional)
All the odels in the Evolution EV HAC range of boilers are supplied with a circulation pu p
connected to heating circuit 1 (BC
1
). In addition to this circuit, all the odels are designed to
control a second heating circulation pu p in a second heating circuit (circuit 2, BC
2
).
The hydraulic installation of heating circuit 2 should be ade using the optional flow circuit (IC')
on the rear of the boiler (see "Diagra s and Measure ents"). If there is an SRAC2/EV underfloor
heating kit connected to the optional flow IC', heating circuit 2 should be connected at the
additional sockets provided in the kit (on the boiler T-connectors).
The circulation pu p installed in heating circuit 2 ust be electrically connected between
ter inals N and 6 on the supply connector block J2 (see “Electrical Connection Diagra ").

Evolution EV HAC
10
4 COMBUSTION PRODUCTS EXHAUSTION
4.1 Combustion products exhaustion and air intake dual-duct device ø80 (typr C
5
)
In this type, the co bustion products exhaustion and air intake are carried out with separated
pipes of Ø80 ., by eans of the dual-duct outlet Kit of Ø80 code CGAS000186. It is the default
type of exhaustion for boilers Evolution.
The maximum length of pipe that can be installed is 20 etres, which is the result fro adding the
pipe etres for the air intake and those of the co bustion products exhaustion. Each elbow of 90°,
or two of 45°, reduces the available length by 1 etre, and 1 etre of horizontal pipe represents 2
etres of vertical pipe.
It is reco ended that the flue gases outlet pipe be fitted slightly upwardly-inclined 2º to 3º thus
preventing water and condensate projections fro being ejected outside.
Dual-duct outlet Kit ∅80/100 inox
Cod. CGAS000 265
1 . duct ∅80 inox. Cod. CGAS000145
1 . duct ∅100 inox. Cod. CGAS000 268
1 . duct ∅100 PP Cod. CGAS0 00355
90º elbow ∅80 inox Cod. CGAS0 00147
90º elbow ∅100 inox Cod. CGAS000267
90º elbow ∅100 P P Cod. CGAS000358
45 º elbow ∅80 inox. Cod. CGAS000148
45º elbow ∅100 inox. Cod. CGAS000266
45º elbow ∅100 P P Cod. CGAS000357
Exa ples of installation:
L
≤
20 ts.

11
4.2 Double conduit to coaxial exhaustion transformation
The boiler Evolution is given prepared for the exhaustion of the products of co bustion and air
intake by eans of the syste of double conduit of Ø80. When you want to carry out the
exhaustion of co bustion gases by eans of coaxial tube of Ø80/125, you will use for it a Kit
adaptor for coaxial tube Ø80/125 (given under order) Code CGAS000213
Kit adaptor for coaxial tube ∅80/125
Cod. CGAS000213+ Cod. CGAS000222
The transfor ation will be able to realize with two different ounting setups:
1. Back exit : it will be enough with disasse bling the co bustion air intake of the boiler,
unscrewing the three screw, ount the adaptor in the exit of flue gases of the boiler backwards
and using the flexible tube of entry of air, connect it to the adaptor.
2. Lateral or upwards exit: it will be realized in the sa e way, but to ount the adaptor kit
laterally it is necessary to ount an elbow of 90º Ø80 (code CGAS000147), before the adaptor
in the exit of flue gases.
In the following pictures they can observe both setups:
Co bustion air intake
Back exit
90º elbow Ø80
Lateral exit

Evolution EV HAC
12
4. Combustion products exhaustion and air intake horizontally-arranged coaxial device
ø80-125 (type C
1
)
The co bustion products exhaustion and air intake can be carried out through concentric pipes of
Ø80 . for the co bustion products exhaustion and Ø125 . for the air intake by eans of the
horizontally-arranged outlet Kit 1 Ø80-125 code CGAS000189.
The maximum horizontal length counted fro the boiler, including the kit end, is 10 etres. Each
elbow of 90°, or two of 45°, reduces the available length by 1 etre, and 1 etre of horizontal pipe
represents 2 etres of vertical pipe.
It is reco ended that the flue gases outlet pipe be fitted slightly upwardly-inclined 2º to 3º thus
preventing water and condensate projections fro being ejected outside.
Horizontally-arranged outlet 1
∅
80/125
Cod. CGAS000189
90º coaxial elbow
∅
80/125
Cod. CGAS000182
45º coaxial elbow
∅
80/125
Cod. CGAS000183
1 coaxial duct
∅
80/125
Cod. CGAS000184
Exa ples of installation:
L ≤ 6 ts. (EV 30 HAC)
L ≤ 5 ts. (EV 40 HAC)

1
4.4 Combustion products exhaustion and air intake vertically-arranged coaxial device
ø80-125 (type C )
The co bustion products exhaustion and air intake can be carried out through concentric pipes of
Ø80 . for the co bustion products exhaustion and Ø125 . for the air intake, by eans of the
vertically-arranged outlet Kit Ø80-125 code CGAS000231.
The maximum vertical length counted fro the boiler, including the kit end, is 12 etres. Each
elbow of 90°, or two of 45°, reduces the available length by 1 etre, and 1 etre of horizontal pipe
represents 2 etres of vertical pipe.
Vertically outlet ∅80/125
Cód. CGAS000231 Black tile ∅80/125
Cód. CGAS000074
45º elbow
∅
80/125
Cód. CGAS000183
90º elbow
∅
80/125
Cód. CGAS000182
1 coaxial duct ∅80/125
Cód. CGAS000184
Black tile
∅
80/125
Cód. CGAS000075
Exa ples of installation:
L ≤ 7 ts. (EV 30 HAC)
L ≤ 6 ts. (EV 40 HAC)

Evolution EV HAC
14
5 FILLING THE INSTALLATION
To fill the installation, it should be provided with a fill valve, which can be used to fill the installation
until a pressure of 1,5 - 1.5 bars appears on the “ boiler pressure ” setting on the display. The circuit
should be filled slowly and with the auto atic air bleed valve cap
(7)
loose, to let the air out of the
installation. The air should also be bled fro 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 (6)
for controlling the pressure of the installation. If the
installation pressure drops below a ini u of 0.5 bar, the boiler will not switch on and a low
pressure alar will appear on the display ("AP").
NOTE: Switching on the boiler with no water inside could result in serious damage.
6 DIGITAL DISPLAY
The Evolution boiler is electronic and includes a digital display
(11)
showing the actual te peratures,
the setpoint te peratures and the pressure of the installation. In standby ode, the actual boiler
te perature in ºC is shown on the display. The rest of the available display options can be browsed by
touching the MODE button below the display, as follows:
MODE
touch button
D
igital display
Repeatedly place your finger on the MODE touch button to select the different display options. When
the desired option has been selected, it will return to standby after 20 seconds have elapsed.
The following table shows the different display options:
Standby. The actual boiler te perature is shown.
Actual boiler te perature.
Actual do estic hot water te perature (with hot
water tank).

15
Actual flow te perature of the underfloor heating
installation
(option SRAC2/EV only)
Boiler setpoint te perature selected using the
corresponding touch button
(12)
.
Underfloor heating installation flow setpoint
te perature selected using the corresponding
touch button
(12)
.
(option SRAC2/EV only)
DHW setpoint te perature selected using the
corresponding touch button
(16)
(with hot water
tank).
Actual boiler pressure, easured by the Pressure
Sensor
(6)
.
Indication of the heating de and status of each
circuit connected to the boiler.
Setpoint of the heating pu p speed
BC
1.
The desired display contrast can be adjusted using
the touch button on the right of the display
(16)
.

Evolution EV HAC
16
7 TEMPERATURE SELECTION
7.1 Selecting the boiler set point temperature

The desired boiler operating te perature is selected using the touch button, as shown in the
figure. To select the desired te perature, touch the "+" or "-" sy bols to increase or decrease the
te perature respectively. When the te perature has been selected, the display will return to
standby ode after a few seconds.
The boiler setpoint te perature can also be selected by using the MODE touch button to browse to
the “ boiler setpoint te perature " display option. When the display shows this option, touch the "+
/-" sy bols to select the desired te perature.
If you wish to totally disable the boiler heating function (
Summer
ode), select the setpoint value
"
OFF
" by touching the "-" sy bol until this value appears on the display.
The per itted boiler setpoint te perature range is OFF and 30 - 85 ºC. Evolution odel boilers are
condensing boilers. In order to obtain axi u boiler perfor ance and energy savings, it is
therefore reco ended to select a setpoint te perature of 55-70 ºC, providing this is per itted by
the heating syste installed and the insulation conditions of your ho e.
7.2 Selecting the DHW setpoint temperature (with hot water tank only)

The desired DHW te perature is selected using the touch button, as shown in the figure. To select
the desired te perature, touch the "+" or "-" sy bols to increase or decrease the te perature
respectively. When the te perature has been selected, the display will return to standby ode
after a few seconds. The DHW setpoint te perature range per itted is OFF and 15 - 65 ºC.
The DHW setpoint te perature can also be selected by using the MODE touch button to browse to
the “ DHW setpoint te perature " display option. When this option appears on the display, touch
the "+ /-" sy bols to select the desired te perature.
If you wish to totally disable the boiler’s DHW production function, select the setpoint value "
OFF
"
by touching the "-" sy bol until this value appears on the display.

17
7. Selecting the Underfloor Heating flow setpoint temperature (with SRAC2/EV kit option)

When the boiler is installed with the optional SRAC2/EV underfloor heating kit, the desired flow
te perature of the installation can be selected using the touch button as shown in the figure
above. To select the desired te perature, touch the "+" or "-" sy bols to increase or decrease the
te perature respectively. When the te perature has been selected, the display will return to
standby ode after a few seconds.
The installation flow setpoint te perature can also be selected by using the MODE touch button to
browse to the “ underfloor heating installation flow setpoint " display option. When this option
appears on the display, touch the "+ /-" sy bols to select the desired te perature.
If you wish to disable the underfloor heating circuit function, select the setpoint value "
OFF
" by
touching the "-" sy bol until this value appears on the display.
The flow setpoint te perature range per itted is OFF and 0 - 45ºC. To obtain opti u
perfor ance fro the underfloor heating syste installed, we reco end selecting a setpoint
te perature of 25 - 35 ºC, providing this is per itted by the heating syste installed and the
insulation in your ho e.
8 OPERATION
The Evolution EV HAC boiler is supplied in “heating only” ode by default, designed only to heat up a
heating installation (heating circuit 1). If you wish to i prove the installation’s perfor ance, a
do estic hot water tank (Sanit) and/or an underfloor heating Kit (SRAC2/EV) and/or a second heating
circuit, heating circuit 2, ay optionally be connected.
8.1 Functioning in “Heating Only” mode
In this ode, select the desired boiler setpoint te perature (see " Selecting the boiler setpoint
te perature
") and the te perature of roo ther ostat 1 (TA1) or re ote control E20 (if the boiler
is equipped with these). The burner and the heating pu p of circuit 1 (BC
1
) will begin to function
until the installation reaches the selected boiler setpoint te perature (or the te perature on roo
ther ostat, if the unit has one). When the te perature of the installation drops below the selected
boiler te perature, the burner will start up again, running the heating cycle.
The boiler heating function can be totally disabled (
Summer
ode) by selecting "
OFF
" as the boiler
setpoint value. In this operating ode, only the DHW production function will re ain enabled,
providing there is a DHW tank connected to the boiler.
NOTE: When the heating function is disabled, circuit 2 will also be disabled if it is connected.

Evolution EV HAC
18
8.2 Functioning with a Sanit hot water tank
The Evolution EV HAC boiler ay be installed together with a hot water tank fro the DOMUSA
TEKNIK Sanit range, to obtain do estic hot water. For correct installation of the tank, carefully
follow the instructions given in the “Installation Instructions” section of this anual.
In this ode, select the desired DHW setpoint te perature (see "S electing the DHW setpoint
te perature
"). The burner and the DHW pu p will switch on. When the hot water tank reaches the
selected DHW setpoint te perature, it is ready to heat up the heating installation if it is enabled,
starting up the heating pu p and switching off the DHW pu p. The burner will shut down when
the boiler reaches its selected setpoint te perature. The heating pu p will stop when the roo
te perature reaches or exceeds the te perature set on the installation’s roo ther ostat (if it has
one).
If you wish, you ay totally disable the do estic hot water production function by selecting "OFF"
as the DHW setpoint te perature.
8. Heating circuit 2 functioning (Optional)
All the odels in the Evolution EV HAC range of boilers have the option of controlling a second
heating circuit. This requires the installation of a second circulation pu p on the boiler. To correctly
install this pu p, carefully follow the instructions given in the “Installing heating circuit 2” section
of this anual.
Heating circuit 2 will work with the selected boiler setpoint te perature (see “ Selecting the boiler
setpoint te perature
” ) and the te perature of roo ther ostat 2 (TA2) (if the boiler has one). The
burner and the heating pu p of circuit 2 (BC
2
) will begin to function until the installation reaches
the selected boiler setpoint te perature (or the te perature on roo ther ostat 2, if the unit has
one). When the te perature of the installation drops below the selected boiler te perature, the
burner will start up again, running the heating cycle.
NOTE: When the heating function is disabled, if OFF is selected circuit 2 will also be disabled.
8.4 Functioning with an SRAC2/EV Underfloor Heating Kit (Optional)
The Evolution EV HAC boiler ay be used with an SRAC2/EV Underfloor Heating Kit (fitted to
heating circuit 1). This kit basically consists of a otorised 3-way ixing valve, a circulation pu p
and an underfloor heating installation flow te perature sensor. For correct hydraulic installation,
carefully follow the asse bly 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 te perature, selecting the installation flow setpoint te perature using
the boiler setpoint adjust ent touch button on the control panel, between OFF, 0 and 45 ºC (see
“ Selecting the Underfloor Heating flow setpoint te perature ”). In this operating ode, the
electronic control sets the boiler setpoint te perature to 75ºC by default, and the installation flow
te perature can be adjusted to the selected setpoint te perature using the ixing valve.
The boiler setpoint te perature can be changed using the MODE touch button to browse to the
“ boiler te perature setpoint " display option. When the display shows this option, touch the "+ /-"
sy bols to select the desired te perature.
If you wish, the SRAC2/EV Underfloor Heating circuit function can be totally disabled, by selecting
"OFF" as the installation flow setpoint te perature.
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.

19
9 ADDITIONAL FUNCTIONS
The Evolution EV HAC boiler is equipped with an electronic control for efficiently regulating
auto atic boiler functioning. It also has the following additional control features:
9.1 Pump anti-block function
This function prevents the boiler circulation pu ps fro seizing up if they have been out of use for
a long period. This syste re ains enabled while the boiler is plugged into the ains.
9.2 Anti-frost function
This function protects the boiler fro freezing up during cold weather. If the boiler te perature
drops to below 6 ºC, the heating circulation pu p will start up. If the boiler te perature continues
to drop and reaches 4 ºC, the burner will start up, heating the installation. When this function has
been activated, it will continue working until the boiler reaches 8 ºC. This syste re ains on
standby while the boiler is plugged into the ains.
9. Boiler pressure sensor function
This function prevents boiler failure caused by a low water level or excess pressure in the boiler. The
pressure is detected by a pressure sensor
(6)
, and its value appears on the control panel display (see
“ Digital display ”). If the pressure drops below 0.5 bar, the electronic control blocks boiler
functioning and triggers the “AP” alar on the display. If boiler pressure exceeds 2.5 bar, the "HI"
warning will flash on the display to warn of the excess pressure. If this should occur we reco end
calling the nearest Technical Assistance Service, and slightly draining the boiler.
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 re otely, fro any location, by
eans of a phone call. The relay is connected to the boiler via ter inal strip J6 (see “ Electrical
Connection Diagra
”). When the telephone relay contact closes the boiler switches on. When the
contact opens, the boiler switches off and re ains in anti-frost protection and pu p anti-block
ode.
9.5 Room thermostat connection
The boiler has two ter inal strips, TA
1
and TA
2
, for connecting roo ther ostats or roo
chronother ostats (J5 and J7, see " Electrical Connection Diagra ”). This allows the heating ode
for each circuit installed to be switched off according to the roo te perature. To suitably connect
the , first re ove the bridge joining the ter inals of ter inal strip TA
1
, and to connect TA
2
, si ply
connect the ther ostat to the ter inal strip.
Installing a roo ther ostat will opti ise the installation’s perfor ance, adapting the heating to
the require ents of your ho e and obtaining enhanced co fort. Also, if the ther ostat allows the
hours of functioning to be progra ed (chronother ostat), it can adapt the heating syste to the
hours of use of the installation.
9.6 Anti-legionella function (optional) (with hot water tank only)
This optional function prevents the bacteria causing legionnaire’s disease fro proliferating in the
hot water accu ulated in the tank. Every 7 days, the te perature of the water in the tank is raised
to 70 ºC to kill any such bacteria. This function will only run if the boiler is left switched on.