DOMUSA TEKNIK SIRENA CAL HFD User manual

INSTALLATION AND OPERATING INSTRUCTIONS
SIRENA CAL HFD
ER-0170/1996
CGM-04/392

We thank you for having chosen a DOMUSA TEKNIK heating boiler. Within
the product range of DOMUSA TEKNIK, you have chosen the Sirena
model. This boiler is capable of providing you with the comfort level
suitable for your house, and always together with a proper and oil fed
hydraulic installation. In addition, you will be able to enjoy a balanced an
economicalhotwater.
This manual forms an essential part of the product and it must be given to
the user. Read the warnings and recommendations in the manual
carefully, as they contain important information on the safety, use and
maintenanceoftheinstallation.
These boilers must be installed by qualified personnel only, in accordance
withthelegislationinforceandfollowingthe manufacturer's instructions.
The start-up of these boilers and any maintenance operations must only
be carried out by Official Technical Assistance Services of DOMUSA
TEKNIK.
Incorrect installation of these boilers could result in damage to people,
animals or property, and the manufacturer will hold no liability in such
cases.
DOMUSA TEKNIK informs all parties concerned that, in compliance with
section 1 of the first additional provision of Law 11/1997, the
responsibility for delivering packaging waste or used packaging for its
proper environmental management will be that of the final owner of the
product (Article 18.1 Royal Decree 782/1998). At the end of its useful life,
the product must be taken to a selected collection point for electrical and
electronic equipment or must be returned to the distributor at the time of
purchasing a new equivalent appliance. For more detailed information on
the collection schemes available, contact either the collection facilities of
thelocalauthorityorthedistributorwherethe purchase was made.

1
TABLE DES MATIÈRES Page
1 LIST OF COMPONENTS.......................................................................................................................................................................................................................2
2 CONTROL COMPONENTS..................................................................................................................................................................................................................3
3 INSTALLATION INSTRUCTIONS.......................................................................................................................................................................................................4
3.1LOCATION................................................................................................................................................................................................................................................4
3.2UPTAKE....................................................................................................................................................................................................................................................4
3.3HYDRAULIC INSTALLATION .....................................................................................................................................................................................................................4
3.4ELECTRIC INSTALLATION..........................................................................................................................................................................................................................4
3.5OIL INSTALLATION...................................................................................................................................................................................................................................4
4 INSTALLATION WATER-FILLING......................................................................................................................................................................................................5
5 SAFETY LOCKING .................................................................................................................................................................................................................................5
5.1TEMPERATURE SAFETY LOCKING .............................................................................................................................................................................................................5
5.2BURNER LOCKING....................................................................................................................................................................................................................................5
6 BOILER OPERATION.............................................................................................................................................................................................................................5
6.1BOILER OPERATION WITH A SANIT HOT WATER TANK.............................................................................................................................................................................5
7 TIMER-BASED OPERATION (OPTIONAL).......................................................................................................................................................................................6
8 BOILER STOP..........................................................................................................................................................................................................................................6
9 START-UP................................................................................................................................................................................................................................................6
10 EQUIPMENT DELIVERY.....................................................................................................................................................................................................................6
11 BOILER MAINTENANCE....................................................................................................................................................................................................................6
12 CIRCULATING PUMPS FLOW CURVES........................................................................................................................................................................................7
12.1CHARACTERISTIC CURVES OF THE PUMP...............................................................................................................................................................................................7
13 DIMENSIONS.......................................................................................................................................................................................................................................9
14 TECHNICAL DATA...........................................................................................................................................................................................................................10
14.1ACUMULATEUR BTDUO 150-250.................................................................................................................................................................................................10
15 ELECTRICAL DIAGRAMS...............................................................................................................................................................................................................11
16 BURNER CONTROL OPERATING SEQUENCE.........................................................................................................................................................................12
17 FAILURES...........................................................................................................................................................................................................................................13
17.1BURNER ERROR CODE.........................................................................................................................................................................................................................13
17.2BOILER FAILURES................................................................................................................................................................................................................................13
17.3CIRCULATING PUMP STATUS CODES..................................................................................................................................................................................................14
18 BURNER..............................................................................................................................................................................................................................................15
18.1MOUNTING........................................................................................................................................................................................................................................15
18.2OIL INSTALLATION..............................................................................................................................................................................................................................15
18.3START UP OF THE BURNER..................................................................................................................................................................................................................15
18.4BURNER COMBUSTION ADJUSTMENT.................................................................................................................................................................................................15
18.5SELECTION OF OIL NOZZLE.................................................................................................................................................................................................................15
18.6DIMENSIONS.................................................................................................................................................................................................................................16
18.7PRIMARY COMBUSTION AIR ADJUSTMENT..........................................................................................................................................................................................17
18.8COMBUSTION LINE ADJUSTMENT.......................................................................................................................................................................................................17
18.9CORRECT POSITIONING OF IGNITION ELECTRODES.............................................................................................................................................................................17
18.10OIL PRESSURE ADJUSTMENT ............................................................................................................................................................................................................17
18.11OIL INSTALLATION DIAGRAMS .........................................................................................................................................................................................................18
18.12TECHNICALDATA ............................................................................................................................................................................................................................19
18.13WORKING DIAGRAM.........................................................................................................................................................................................................................19
18.14OIL FLOW VERSUS NOZZLE AND PUMP PRESSURE ...........................................................................................................................................................................19
18.15ELECTRICALDIAGRAMS....................................................................................................................................................................................................................20
18.16OILEASYCONNECTION..........................................................................................................................................................................................................21
18.17 BURNER CONTROL OPERATING SEQUENCE...................................................................................................................................................................22
19 . TROUBLESHOOTING....................................................................................................................................................................................................................23
19.1BURNER ERROR CODE.........................................................................................................................................................................................................................23
19.2BOILER FAILURES................................................................................................................................................................................................................................23
19.3THERMOSTAT.....................................................................................................................................................................................................................................23
20 GUARANTEE CONDITIONS..........................................................................................................................................................................................................24
21 CONDITIONS DE LA GARANTIE..................................................................................................................................................................................................25

Sirena Cal HFD
2
1LISTOFCOMPONENTS
11
12
13
14
15
16
11.Expansionvessel.
12.Automaticairvent.
13.Pressurereliefvalve.
14.Heatingcirculatingpump.
15.Unidirectionalvalve.
16.Burner.

3
2CONTROLCOMPONENTS
3
bar
21
4 5 6 7 8 9 10
t
1. Safety thermostat:
It ensures that the boiler temperature does not
exceed110ºCbylockingitsoperation.
2. Control thermostat.
You will be able to, by means of this element,
select the heating working temperature,
stopping the burner when the boiler
temperature reaches that selected or keeping it
running as long as the temperature is lower
thanthatpre-set.
3. Thermometer:
Itindicatestheboilerwatertemperature.
4. Timer Optional):
It is an optional element capable of operating
in a weekly or daily basis, allowing the
switching ON/OFF cycles of the boiler to be
selected.
5. Pressure gauge
Itindicatestheinstallationpressure.
6. Main selector:
It allows the boiler to be switched on and off by
pushing"O/I"button.
7. Pilot Summer:
Whenlit,itindicatesthattheserviceis selected
Summer(A.C.S.only).
8. Pilot Winter:
Whenlit,itindicatesthattheserviceis selected
Winter(heating+A.C.S.).
9. Blocked due to temperature pilot light:
When lit, it indicates that the boiler operation
has been blocked due to excessive
temperature(higherthan110ºC).
10. Burner blocked pilot light:
When lit, it indicates that the boiler operation
has been blocked due to blocking of the
burner.

Sirena Cal HFD
4
3INSTALLATIONINSTRUCTIONS
The boiler has to be installed by personnel authorised by the Department of Industry in accordance
with the regulations and normative in force on this matter. Notwithstanding, it will be necessary to
complywiththefollowingrecommendationswheninstallingthe boiler:
3.1 Location
Theboileristobeinstalledintoa sufficiently ventilated site.
3.2 Uptake
It is essential for this type of boiler to be connected to an uptake, being defined as that flue being
capable of generating a depression (in our case of 1.5 mmH2O for Sirena Cal HFD). It is advisable, for
the uptake to be capable of generating a depression, to follow the recommendations described
below:
-Itistobeprovidedwitha suitable thermal insulation.
-Itistobeseparatelyfitted,building an uptake for each boiler.
-Itistobeverticallymountedand angles higher than 45º are to be avoided.
-Itistostickupametre through the roof ridge beam or any adjacent building.
- It is always to have the same section, the circular one is recommended, and it will never be less
thantheboileroutletdiameter.
However, they will always be built in accordance with the standards corresponding to the
normativeoninstallation.
3.3 Hydraulic installation
The hydraulic installation is to be carried out by skilled personnel complying with the installation
standardsandtakingthefollowingrecommendationsintoaccount:
- A thorough interior cleaning of the installation piping is to be performed prior to the switching
onoftheboiler.
- It is recommended that cut-off valves be interspersed between the installation piping and the
boiler,inordertosimplifythemaintenancetasks.
3.4 Electric installation
The boiler is ready to be connected at 220 V 50 Hz on plugs 1 and 2 of the terminal strip. Do not
forget to do grounding.
In addition, the boiler is provided with two terminals for the room thermostat connection (see
Electrical Diagram). For that, the bridge joining both terminals is to be removed and the room
thermostatistobeconnectedthere.
3.5 Oil installation
The model Sirena is supplied with an oil burner Domestic (see the model in the Technical Data). For
acorrectoillineinstallationproceedinaccordance with the burner instructions.

5
4INSTALLATIONWATER-FILLING
In order to fill the installation, open the filling valve up to the pressure gauge (5) indicates a pressure
between 1 and 1.5 bar. Filling is to be carried out slowly and with the automatic air vent open, so that
the installation air will be released. In addition, the other parts of the installation are to be properly
drained by means of the air vent valves fitted for such a purpose. Once the installation has been filled
up,closethefillingvalve.
NOTE: Switching on the boiler without water could result in serious damage to it.
5SAFETYLOCKING
Theboilerisprovidedwithtwotypesof operating safety locking:
5.1 Temperature safety locking
This locking is indicated by the temperature locked out neon light (9) . It will occur every time the
temperature in the boiler exceeds 110º C. The safety thermostat (1) built-in button will be pressed
inordertounlockit,oncetheplug covering this button has been previously loosened.
5.2 Burner locking
This locking is indicated by the burner locked out neon light (10) . It is caused by any failure which
could exist in the burner or oil line. To unlock, press the burner lighted push button which becomes
puton (16) .
NOTE: If any of these lockings were repetitive, contact the nearest authorised Technical Assistance.
6BOILEROPERATION
Select the temperature desired in the control thermostat (2) and in the room thermostat (if any).
Switch on the boiler setting the main selector (6) to "I" position and to "" position. The burner will
start operating up to the boiler reaches the temperature selected on the control thermostat (it
should be between 60 ºC and 85 ºC). In its turn, the circulating pump will start operating. When the
room temperature is higher than or equal to that rated on the installation room thermostat (if any),
thecirculatingpumpwillstop
6.1 Boiler operation with a Sanit hot water tank
The model Sirena Cal HFD can be supplied with a Sanit DHW tank of DOMUSA TEKNIK to install
them in combination, to obtain a high production of DHW. For a correct installation of the tank
followcarefullytheinstallationandoperatinginstructionsincluded with the tank.
The boilers are supplied with an optional heating outlet IC' (see Dimensions) to connect the DHW
tank Sanit to the boiler. To work with the combination of the boiler and SanitDHW tank, the boiler's
mainselectorhastwodifferentpositions,Summerand Winter:
- Summer position ☼: The boiler will supply, at this position, only DHW, putting on the burner
and the DHW circulating pump (summer pump) up to the tank reaches the temperature
selected on the DHW regulation thermostat, placed on the main board of the tank. When the
temperatureselectedintheDHWtankisreached, the burner and the summer pump will stop.
- Winter position : The boiler will be, at this position, capable of heating the DHW tank and
heatinginstallation,givingprioritytotheDHWproduction.

Sirena Cal HFD
6
7TIMER-BASEDOPERATION(OPTIONAL)
The boiler Sirena can be supplied with a timer, as an option, to be mounted on the main board. The
boiler and the timer are supplied with an easy mounting system, which consist in a 12-pole connector
(X12) shownintheElectricalDiagram.
Boilers equipped with a timer have the possibility of operating in three positions, depending on which
theprogrammerswitchis:
- Run (I): In this position, the boiler will operate continuously, irrespective of the position of
programmertabs.
- Automatic :When the timer switch is at this position, the boiler will operate with switching
ON/OFF cycles according to the programmer tabs. The boiler will be switched ON at the positions
on which tabs are pressed outwardly, and it will be switched OFF at those positions on which tabs
arepressedinwardly.
- Stop (O): Theboilerwillbedisconnected at this position.
In order to set the time on the timer, set the current time over the arrow provided in the timer for such
apurpose.
8BOILERSTOP
Setthemainselector (6) to"O"positioninordertostop completely the boiler.
9START-UP
The start-up of the boiler, for the validity of warranty to be in force, is to be carried out by a Technical
Assistance Service authorised by DOMUSA TEKNIK. Prior to proceeding to such a start-up, the
followingstepswillbeperformed:
-Theboileristobeelectricallyconnected to the mains.
-Theinstallationhastobefilledup with water (manometer between 1-1.5 bar).
-Oilistocomeuptothe burner at a pressure not higher than 0.5 bar.
In order to start up the boiler, set the main selector, control thermostat, and the timer and the room
thermostat(ifany),atthedesiredposition.
10 EQUIPMENTDELIVERY
The Technical Assistance Service, once the first start-up has been carried out, will explain the boiler
operationtotheusersbyinformingthemabout the most necessary remarks.
The fitter will be responsible for explaining to the users the operation of any control or regulation
devicethatisapartoftheinstallation and it is not supplied with the boiler.
11 BOILERMAINTENANCE
In order to maintain the boiler under correct operating conditions, a checking operation is to be made
byDOMUSATEKNIK’sauthorisedpersonnelonayearly basis. Notwithstanding:

7
-Onceayear,werecommendtoclean carefully boiler chamber and flue gases pipes.
-Theinstallationpressureistobemaintained between 1 and 1.5 bar.
- If your boiler has been stopped for a long period of time, you should ensure that circulating
pumps operate properly. For that, remove the front plug of the pump, leaving the pump shaft
exposed. If the shaft does not rotate, switch off the pump by means of the main selector (1) . Press
lightly the shaft by means of a suitable screwdriver and make it rotate in both directions. Switch on
theselectoragain
12 CIRCULATINGPUMPSFLOWCURVES
It will be possible to obtain, in the following charts, the hydrodriving pressure available in the
installationattheboilerexit,havingtakenthe boiler pressure drop into account.
12.1 Characteristic curves of the pump.
I
II
III
Min.
Thepumpcanbeadjustedintwoways:
1-Constant speed I, II, III (traditional mode):
Thepumpoperatesataconstant,pre-setspeed.
2-Variable differential pressure (Δp-v):
The setpoint value of the differential pressure H increases in a straight line between ½H and H
within the permitted flow margin. The differential pressure generated by the pump is adjusted to
theappropriatesetpointvalueofdifferentialpressure.
The graphs below show the operating curves for the pump integrated in the kit. These graphs show
thecurves,correspondingtothedifferentoptionsof the circulating pump.

Sirena Cal HFD
8
Characteristiccurveofthecirculationpumpforthe constant speed mode I, II, III:
Characteristiccurveofthecirculationpumpforthe variable differential pressure mode:

9
13 DIMENSIONS
IC'
V
456 L
ø150
115 150
615
95
625
30
85
97
840
1/2"
225
385
520
690
IAS
EAS
IC
VS
RC
220
3/4"
IC: Heatingoutlet.
IC': Optionalheatingoutlet(CALHFD).
RC: Heatinginlet.
V:Drainage MODEL IC/IC'
RC/RC' DIM. L
VS: Pressurereliefvalve. HFD-30 3/4"M 650
HFD-40 1"M 750
HFD-50 1"M 850
.

Sirena Cal HFD
10
14 TECHNICALDATA
14.1 Acumulateur BT Duo 150-250
SIRENA CAL HFD 30 HFD 40 HFD 50 HFD
Low temperature
Boilertype - Heatingonly
Ratedheatoutput Prated kW 29 40 50
Usefulheatoutput P4kW 28,1 39,4 50,8
Usefulheatoutput(30%) P1kW 8,9 12,1 15,6
Seasonalspaceheatingenergyefficiency ȠS% 86 87 86
%(PCI) 91,5 94,7 94,5
Usefulefficiency Ƞ4%(PCS) 86,3 89,3 89,1
%(PCI) 97,5 97 96,3
Usefulefficiency(30%) Ƞ1%(PCS) 92,0 91,4 90,8
Auxiliaryelectricityconsumptionatfullload elmax kW 0,152 0,161 0,161
Auxiliaryelectricityconsumptionatpartload elmin kW 0,055 0,056 0,056
Auxiliary electricity consumption in standbymode PSB kW 0,003 0,003 0,003
Standbyheatloss Pstby kW 0,106 0,094 0,141
Emissionsofnitrogenoxides NOx mg/kWh 126 105 128
Heatingtemperatureadjustment ºC 60-85
Maximumsafetytemperature ºC 110
Maximumpressureforheatingmode bar 3
Heatingexpansionvesselcapacity Lts 8 12 12
Heatingwatervolume Lts 16,2 20,2 24,2
Waterpressuredrop mbar 100 204 263
Fumetemperature ºC 213 213 208
Volumeonfumeside Lts 11,4 17,5 23,5
Maximumfumeflow Kg/s 0,0132 0,0186 0,0245
Fumepressuredrop mbar 0,17 0,18 0,20
Combustionchamberlength mm 300 400 500
Combustionchambertype - wet,withthreefumeoutlets
Burneradjustmenttype - ON/OFF
Electricalsupply - ~220-230V-50Hz-200W
Grossweight Kg 144 171 198

11
15 ELECTRICALDIAGRAMS
1 2 3 4 5 6 7 8 9 10 11
PT
PB
FN
B
SC
HC
RT
bc7
220 V
PON TC
C
1
TS
C
21
WS
2
2b2a
O/I
1a
1
Brown Blue Green Blue Pink Gre
y
Red Red White
Blue
Blue Blue
Black
Black Oran
g
e
Orange
Black
TF3
C
21
1 2 3
White
Thw
C
NONC
Yellow Red Gre
y
Black Oran
g
e
White
Green
Blue
Green
Gre
y
Black Black
Black Blue Brown
Blue
2
1
3
4
5
6
7
8
9
10
11
12
Brown
Blue
Green
X12
B: Burner.
SC: DHW tank Pump (summer pump).
HC: HeatingcirculatingPump.
RT: Roomthermostat.
bc7: Terminal no. 7 of Burner Control.
O/I: MainSelector.
S/W: Summer-Winterselector.
Thw: DHWtankthermostat.
TC: Control Thermostat (on boiler).
TS: Safety Thermostat (on boiler).
TF3: AntiinertiaThermostat:93ºC(onboiler).
PON: ON-OFF neon light.
PT: Temperature locked out neon light.
PB: Burner locked out neon light.
X12: Timermountingconnector.

Sirena Cal HFD
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16 BURNERCONTROLOPERATINGSEQUENCE
The burner’s LMO control box has a reset button which
is the key element for resetting the burner control and
activating/deactivatingthediagnosisfunctions.
The multi-colour LED on the reset button is the
indicator for visual diagnosis. The button and the LED
are located under the transparent cover of the reset
button. During normal functioning, the various
operating statuses are indicated in the form of colour
codes (see the colour code table below). During
ignition, the indication is as shown in the following
table:
Colour code table for multi-colour indicator lights (LEDs)
Status Colour code Colour
Wait time «tw», other standby statuses ................................................................... Off
Fuel pre-heater on …………………………………… Yellow
Ignition phase, controlled ignition Flashing yellow
Functioning, flame OK …………………………………… Green
Functioning, flame not OK
Flashing green
External light during burner ignition Red/green
Undervoltage Yellow/red
Failure, alarm
…………………………………… Red
Error code output (see «Error code table») Flashing red
Interface diagnosis
Flashing red light
….. Steady light Red
Off Yellow
Green
Reset button

13
17 FAILURES
Thissectionprovidesanindexofthemost common failures in both the burner and boiler.
17.1 Burner error code
We have already mentioned that the burner is equipped with a cut-out system, indicated by the reset
button light. It may cut out accidentally, and in this case the steady red light on this button will come
on. You may unblock it by pressing the button for approx. 1 second. When the burner is blocked and
the steady red light is on, visual failure diagnosis may be activated, in accordance with the error code
table.Toentervisualfailurediagnosismode,hold down the reset button for at least three seconds.
Error code table
Red flashing LED code “AL” on
term. 10 Possible cause
Flashes2times On No flame established when ignition safety time
ends.
-Fuelvalvesdefectiveordirty
-Flamedetectordefectiveordirty
-Burnermaladjustment,nofuel
-Ignitionunitdefective
Flashes4times On Externallightduringburnerignition
Flashes7times On Excessive flame loss during functioning (limited
numberofrepetitions)
-Fuelvalvesdefectiveordirty
-Flamedetectordefectiveordirty
-Burnermaladjustment
Flashes8times On Supervisionoffuelpre-heatertime
Flashes10times On Cabling fault or internal failure, output contacts,
otherfailures
Duringthefailurediagnosistime,thecontroloutputs are disabled and the burner remains off.
To exit failure diagnosis and activate the burner again, reset the burner control. Hold down the
resetbuttonforapprox.1second(<3s).
17.2 Boiler failures
FAILURE CAUSE REMEDY
-Thepumpdoesnotrotate Unlockthepump
RADIATOR
DOESNOT
HEAT -Airinhydrauliccircuit Draintheinstallationand
boiler(Theairventplugis
alwaystobeloose)
-Poorly-adjustedburner Adjustproperly
-Thereisnosealingontheuptake Eliminate the leakage
-Unstableflame Checktheburner
EXCESSIVE
NOISE
-Uptakewithnothermalinsulation Insulateproperly

Sirena Cal HFD
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17.3 Circulating pump status codes
The high efficiency pumps of the Bio M Underfloor Heating Hydraulic Kit include a Led (light)
whichdisplaystheirstatus.
PUMP LIGHT DESCRIPTION STATUS CAUSE SOLUTION
Itislitgreen The pump is functioning Thepumpoperates accordingtoits
setting
Standardfunctioning
1.Lowvoltage
U<160V
or
Excessvoltage
U>253V
1.Checkthe
power
supply
195 V<U<253 V
Itflashes
red/green Theisreadyfor
servicebutisnot
functioning
Thepumpwillstart
upagain
automaticallyonce
theerrorhasbeen
solved 2.Excesstemperature
ofthemodule:the
temperatureofthe
motoristoo
high
2.Checkthe
room
temperatureandthat
ofthefluid
Flashesred
Thepumpisout of
order Thepumpisstopped (blocked) The pump does not start
upautomatically. Changethepump. Please contactyournearest
officialtechnical
assistanceservicetohave
itreplaced
1.Thepumpis not
connectedtothepower
supply
1.Checkthe
connectionofthecable
2.TheLEDis faulty 2.Checkif
thepumpworks
Lightoff Thereisno power
supply Theelectricalsystem
isnotreceiving
powersupply 3.Theelectrical system is
faulty 3.Changethe Pump.Changethe
pump.Pleasecontact
your nearest official
technicalassistance
servicetohaveit replaced

15
18 BURNER
18.1 Mounting
Fix the burner support to the boiler. Fix the burner to the support. This allows a correct inclination of
the flame tube towards the combustion chamber. Mount the oil aspiration and return tubes, including
theoil-filterintheaspiration.
18.2 oil installation
"Domestic" burner is equipped with a self-aspiration pump, which allows the aspiration of
combustible from the tank which is installed in a lower level than the burner, as long as the pressure
measuredwithavacuometerinthepumpdoes not exceed 30 cmHg.
18.3 start up of the burner
Make sure that there is combustible in the tank, also that the oil valves are open and there is electric
connection to the burner. Switch on the main switch. Unscrew the air-drains screw (manometer tap).
Then, when the electrovalve opens, take the photocell sensor out of its place and approach it to a
luminoussourceuntiloilcomesout.Disconnecttheburner and screw the drains-screw
18.4 burner combustion adjustment
Observe the flame. If there is not enough combustion air, it will be dark and it will produce smoke
whichwillclosetheuptake.
On the other hand, if there is too much combustion air, the flame will be white or white-blue coloured,
reducing the efficiency and therefore not fulfilling the anti-pollution norms. Besides, the excess of air
maydifficulttheignitionprocess.
Theflamemustbekindoforangecoloured.
Due to the construction of the boiler, if it is difficult or impossible for you to see its flame, the
combustion airflow can be set-up observing the smoke coming out from the chimney. If it is dark, the
air in the burner will have to be increased and if it is white, the air in the burner will have to be
decreaseduntilthereisnosmokeatall.
If you are provided with a device, which verifies the composition of the combustion gases, it will be
the best guide toadjust the flame, but ifyou do not have it, follow the preceding indications.
18.5 selection of oil nozzle
Go to the chart shown on page no.5 and select the correct oil nozzle in accordance with the pressure,
bearinginmindthat1Kg/hofoil approximately produces 11.86 kW.

Sirena Cal HFD
16
18.6 DIMENSIONS
I
G
E F
H
F'
B
A
C
D
LJ
K
DIMENSIONS TABLE
DIMENSION A B C D E F F' G H I J K L
(mm) 292 265 140 152 215 75 98 290 ø80 205 100 100 ø90
F:DomesticD-3.
F':DomesticD-4.

17
18.7 primary combustion air adjustment
To adjust the primary combustion air, turn the
screw as shown on the drawing by means of a 6
mm. Allen wrench. To increase the airflow, turn
it to the right and to decrease it, turn it to the
left.
18.8 combustion line adjustment
To adjust the combustion line, unscrew the combustion line blocking screw "BL". Turn the line
adjustment screw "RL" to the right to increase the airflow and to the left to decrease it. After the
adjustment has been made,screw the combustion line blocking screw "BL".
BL
RL
+
-
3 mm
0
1
18.9 correct positioning of ignition electrodes
To assure a good ignition of the burner Domestic, it is necessary to respect the measures shown in the
drawing. Besides, before mounting the flame tube again, make sure that the blocking screws of the
electrodeshavebeenfixed.
2/3 mm
3 mm
18.10 oil pressure adjustment
To adjust the pressure of the oil pump, turn the screw (1) to the right in order to increase it and to the
leftinordertodecreaseit.
10
0

Sirena Cal HFD
18
1-Pressureadjustment.
2-Vacuometernipple.
3-Electrovalve.
4-Manometernipple.
5-Oiloutlet.
6-Oilreturn.
7-Oilinlet.
18.11 oil installation diagrams
These diagrams and charts belong to oil line installations without reductions and with a perfect
hydraulic sealed. It is highly recommended to use copper pipes. Depression of maximum 0,4 bar (30
cmHg)mustnotbeexceeded.
In aspiration installation
H Pipes length
(m) in8mm. in 10 mm.
0,0 25 60
0,5 21 50
1,0 18 44
1,5 15 38
2,0 12 26
2,5 10 26
3,0 8 20
3,5 6 16
In charge installation
H Pipes length
(m) in8mm. in 10 mm.
0,5 10 20
1,0 20 40
1,5 40 80
2,0 60 100
In aspiration installation
H
In charge installation
H
H
SUNTEC - MOD. AS47C
1
2
34
5
67
DANFOSS - MOD. BFP 21 L3
3
5
4
2
7
6
1