Potterton Sirius two WH Manual

7112240.02 (1-07/13) 2
Dear Customer,
Thank you for your purchase. Our company is condent that your new product will meet all of your requirements.
Purchasing this product gives you a solution that provides peace of mind, ease of use and exceptional performance.
Please ensure that you read this manual before installing the product as it contains vital information for its correct use.
Failure to install the product as advised in this manual may result in void of the warranty terms and conditions.
Our company declares that these products are marked in compliance with the essential requirements of the
following Directives:
- Gas Directive 2009/142/EC
- Efciency Directive 92/42/EEC
- Electromagnetic Compatibility Directive 2004/108/EC
- Low Voltage Directive 2006/95/EC
Our company, constantly striving to improve its products, reserves the right to modify the details given in this documentation
at any time and without notice. These Instructions are to provide consumers with user information and under no circumstance
should they be construed as a contract with a third party.
CONTENT
DESCRIPTION OF SYMBOLS ....................................................................................................................................................................3
GENERAL PRECAUTIONS .........................................................................................................................................................................3
SAFETY WARNINGS....................................................................................................................................................................................4
1. TECHNICAL SPECIFICATIONS ...................................................................................................................................................................5
2. INSTALLING THE BOILER ...........................................................................................................................................................................6
3. INSTALLING THE FLUES.............................................................................................................................................................................10
4. CONCENTRIC FLUES..................................................................................................................................................................................10
5. CASCADE FLUES ........................................................................................................................................................................................12
6. BOILER PUMP..............................................................................................................................................................................................12
7. PUMP CAPACITY/ HEAD .............................................................................................................................................................................14
8. ELECTRICAL CONNECTIONS.....................................................................................................................................................................14
9. ACCESSORIES NOT INCLUDED IN THE PACKAGING ...........................................................................................................................16
SETTING PARAMETERS USING THE REMOTE CONTROL......................................................................................................................16
OUTDOOR SYSTEM MANAGEMENT MODULES.......................................................................................................................................19
10. COMMISSIONING THE BOILER..................................................................................................................................................................20
11. FILLING THE SYSTEM.................................................................................................................................................................................20
12. SYSTEM AIR EXTRACTION FUNCTION.....................................................................................................................................................20
13. GAS VALVE COMMISSIONING....................................................................................................................................................................21
13.1 GAS CONVERSION .....................................................................................................................................................................................21
14. SPECIAL FUNCTIONS .................................................................................................................................................................................22
14.1 COMMISSIONING FUNCTION.....................................................................................................................................................................22
14.2 CHIMNEY SWEEP MODE............................................................................................................................................................................22
15. ADJUSTING THE CH AND DHW FLOW TEMPERATURE ..........................................................................................................................22
16. OPERATING MODES ...................................................................................................................................................................................22
17. SWITCHING OFF THE BOILER ...................................................................................................................................................................22
18. PROLONGED SHUTDOWN / FROST PROTECTION .................................................................................................................................22
ENERGY-SAVING TIPS................................................................................................................................................................................23
19. BOILER MENU CONTENTS.........................................................................................................................................................................23
20. PARAMETER SETTINGS .............................................................................................................................................................................23
21. FAULTS .........................................................................................................................................................................................................25
22. FAULTS THAT CANNOT BE RESET BY THE USER ...................................................................................................................................26
23. ADJUSTMENT AND SAFETY DEVICES......................................................................................................................................................26
24. ROUTINE MAINTENANCE INSTRUCTIONS...............................................................................................................................................27
25. ANNUAL SERVICING ...................................................................................................................................................................................27
25.1 CLEAN THE HEAT EXCHANGER................................................................................................................................................................27
25.2 CHECKING THE BURNER...........................................................................................................................................................................28
25.3 CLEANING THE CONDESATE TRAP..........................................................................................................................................................28
25.4 COMBUSTION PARAMETERS ....................................................................................................................................................................28
26. DIAGRAMS ...................................................................................................................................................................................................29

3 7112240.02 (1-07/13)
DESCRIPTION OF SYMBOLS
WARNING
Risk of damage to or malfunction of the appliance. Pay special attention to the warnings concerning dan-
ger to people.
DANGER OF BURNS
Wait for the appliance to cool down before working on the parts exposed to heat.
DANGER - HIGH VOLTAGE
Live components - electrocution hazard.
DANGER OF FREEZING
Possible formation of ice due to low temperatures.
IMPORTANT INFORMATION
Information to read with particular care as it is useful for the correct operation of the boiler.
GENERIC PROHIBITION
It is forbidden to do/use the things indicated alongside the symbol.
GENERAL PRECAUTIONS
This boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure. It must be con-
nected to a central heating system and to a domestic hot water supply system according to its performance and power output.
Before having the boiler installed by a qualied service engineer, make sure the following operations are performed:
• Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings on the
packaging and the rating plate on the appliance.
• Make sure that the ue terminal draft is appropriate, that the terminal is not obstructed and that no exhaust gases from other
appliances are expelled through the same ue duct, unless the latter has been specially designed to collect exhaust gas from
more than one appliance, in compliance with current laws and regulations.
• Make sure that, if the boiler is connected to existing ue ducts, these have been thoroughly cleaned as residual products of
combustion may detach from the walls during operation and obstruct the ow of fumes.
• The use of a chimney liner is required for condensing boiler.
• To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit
1.1 If the water is harder than 15 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser or an
equivalent treatment system, compliant with current regulations.
1.2 Thoroughly ush the system after installation of the appliance and before use.
1.3 The materials used for the DHW circuit must comply with Directive 98/83/EC.
2. Heating circuit
2.1 New system: Before installing the boiler, the system must be cleaned and ushed to eliminate residual thread-cutting, swarf,
solder and any solvents, using suitable off-the-shelf non-acid and non-alkaline products such as Sentinel X300 or Fernox F3
that do not damage metal, plastic and rubber parts. To protect the system from corrosion, sludge and scale, use inhibitors such
as SENTINEL X100 and FERNOX protector for heating circuits. Use these products in strict compliance with the manufacturers’
instructions.
2.2 Existing system: Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suit-
able proprietary products. Recommended cleaning products are: SENTINEL X400 or SENTICLENE 8500 (ideal for unplanned
emergency cleans) and FERNOX regenerator for heating circuits. Use these products in strict compliance with the manufactur-
ers’ instructions. Remember that the presence of foreign bodies in the heating system can adversely affect boiler operation (e.g.
overheating and excessive noise of the heat exchanger).
If heating systems are to be operated at lower than normal temperatures (>60C) to accommodate under-oor heating require-
ments etc then consideration should be given to the use of a long lasting biocide such as Sentinel Senticide 7500 or Fernox AF10
to prevent microbiological activity.

7112240.02 (1-07/13) 4
Initial lighting of the boiler must be carried out by an authorised Service Engineer who must rst ensure that:
• The rated data correspond to the supply (electricity, water and gas) data.
• That the installation complies with current regulations.
• The appliance is correctly connected to the power supply and earthed.
IMPORTANT INFORMATION : THIS FUNCTION MUST NOT BE USED WITH LPG GAS (G31)
The appliance must be installed in a ventilated boiler room pursuant to current regulations (appliances with heating capacity
> 40 kW).
Failure to observe the above will render the warranty null and void. The names of the authorised Service Centres are indi-
cated in the attached sheet. Prior to commissioning, remove the protective plastic coating from the boiler. Do not use any
tools or abrasive detergents to do this as you may damage the painted surfaces.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of danger.
SAFETY WARNINGS
SMELL OF GAS
• Switch off the boiler.
• Do not activate any electrical device (such as switching on the light).
• Put out any naked ames and open the windows.
• Call an Authorised Service Engineer.
SMELL OF COMBUSTION FUMES
• Switch off the boiler.
• Open all the doors and windows to ventilate the room.
• Call an Authorised Service Engineer.
FLAMMABLE MATERIAL
Do not use and/or store highly ammable material (thinners, paper, etc.) near the boiler.
SERVICING AND CLEANING THE BOILER
Switch off the boiler before working on it.
The appliance is not intended to be used by persons with reduced physical, sensory or mental capacities, or who lack ex-
perience or knowledge, unless, through the mediation of a person responsible for their safety, they have had the benet of
supervision or of instructions on the use of the appliance.

5 7112240.02 (1-07/13)
1. TECHNICAL SPECIFICATIONS
Model: SIRIUS TWO WH 50 WH 60 WH 70
Category II2H3P
Gas used Natural Gas and LPG - G20 - G31
Rated heat input kW 46,3 56,6 66,9
Reduced heat input kW 5,1 6,3 7,4
Rated heat output 80/60°C kW 45 55 65
Rated heat output 50/30 °C kW 48,6 59,4 70,2
Reduced heat output 80/60 °C kW 5,0 6,1 7,2
Reduced heat output 50/30 °C kW 5,4 6,6 7,8
Net Rated efciency (92/42/EEC) 80/60 °C % 97,4 97,2 97,2
Net Rated efciency 50/30 °C % 105,0 105,0 105,0
Efciency 30% Pn (92/42/EEC) % 107,8 107,4 107,1
Max. water pressure in heating circuit bar 4
Min. water pressure in heating circuit bar 1
Capacity of boiler circuit (volume of water) l 4 5 6
Temperature range in heating circuit °C 25 - 80
Flue Types - C13 - C33 – B23
Concentric ue duct diameter mm 80/125
Max. mass ow rate of ue kg/s 0,021 0,026 0,031
Min. mass ow rate of ue kg/s 0,002 0,003 0,004
Max. temperature of ue °C 92 96 76
NOx Class 5 (EN 297 - EN 483) mg/kWh 29,8 34,1 34,8
Natural gas supply pressure 2H (G20) mbar 20
Propane gas supply pressure 3P (G31) mbar 37
Power supply voltage V 230
Power supply frequency Hz 50
Rated power supply (Without Pump) W80 95 95
Rated power supply (With Pump) W190 210 210
Net weight (empty) kg 40 40 50
Dimensions - height mm 766
- width mm 450
- depth mm 377 377 505
Protection-limit against humidity (EN 60529) - IPX5D
Noise level at 1 metre dB(A) < 50
EC certicate Nr. 0085CM0128
CONSUMPTION AT HEAT INPUT Qmax and Qmin
Qmax (G20) - 2H m3/h 4,90 5,98 7,07
Qmin (G20) - 2H m3/h 0,54 0,67 0,78
Qmax (G31) - 3P kg/h 3,60 4,40 5,20
Qmin (G31) - 3P kg/h 0,40 0,49 0,57

7112240.02 (1-07/13) 6
2. INSTALLING THE BOILER
The template outline is shown in chap. "INSTALLING THE BOILER" .
After deciding the exact location of the boiler, x the template to the wall. Connect the system to the gas and water inlets present
on the lower bar of the template. Make sure the rear part of the boiler (back) is as parallel as possible to the wall (otherwise,
shim the lower part). Fit two G1"1/4 taps (ow and return) on the central heating circuit; these taps make it possible to carry out
important operations on the system without draining it completely. On the Italian market, the system must comply with Raccolta
R safety provisions (limit thermostat, safety pressure switch, fuel cut-off valve, etc..). Fit a hydraulic separator, sized according to
maximum boiler and system pressure, downline from the hydraulic connectors of the boiler. If you are either installing the boiler
on an existing system or replacing one, as well as the above, t a settling tank under the boiler on the system return line in order
to collect any deposits and scale circulating in the system after ushing. After xing the boiler to the template, connect the ue
and air ducts, supplied as accessories, as described in the following sections. Connect the siphon to a drain trap, making sure the
slope is continuous. Avoid horizontal stretches. The boiler is electronically tted out for connection to an external storage boiler.
Take special care when lling the heating system. In particular, open any thermostat valves in the system, ensure the water
enters slowly in order to prevent the formation of air inside the primary circuit until operating pressure is reached. Lastly,
vent any radiators in the system. POTTERTON COMMERCIAL declines all liability for damage deriving from the presence of
air bubbles in the primary exchanger due to the incorrect or imprecise observance of the above.
Tighten the boiler water connections with care (maximum tightening torque 30 Nm).

7 7112240.02 (1-07/13)
G 3/4" G 1" G 1"
7109985-01
Ø 8
225
78 294 78
621
48 79 100 100 123
35
38
450
763
G 3/4" G 1"
50
70 72
450 505 - 377
229
225 225
763
144 229
G 1"
Ø 8
G/UNI ISO 228/1 G/UNI ISO 228/1 G/UNI ISO 228/1
Ø 22
(SMOOTH)

7112240.02 (1-07/13) 8
WH 50 - 60 WH 70

9 7112240.02 (1-07/13)
BOILER SCHEMATIC LAYOUT
14
16
13
8
9
7
17
18
15
20
1
2
3
5
4
6
10
11
12
A B C D
19
CR_0412
1 Fan 13 Venturi
2 Air/gas blend manifold 14 Optional pump position
3 Heat exchanger 15 Hydraulic Safety valve
4 Flue sensor 16 Boiler drain tap
5 Flue hood 17 Pressure gauge
6 Concentric flue connector 18 Hydraulic Pressure Sensor
7 Automatic air vent 19 Gas valve
8 NTC heating sensor A Siphon with condensate drain
9 Safety thermostat B Gas inlet connection
10 Ignition electrode C Heating flow connection
11 Flame detection probe D Heating return connection
12
Spark generator

7112240.02 (1-07/13) 10
3. INSTALLING THE FLUES
The boiler is easy and exible to install thanks to the extensive range of available acces-
sories, as described below. The boiler has been designed for connection to a vertical or
horizontal concentric ue.
WARNINGS
C13, C33 The terminals for separate ues must be tted in accordance with the BS
standard and the Clean Air Act 1993. Detailed instructions are provided with the indi-
vidual accessories.
For optimal installation, the accessories supplied by the manufacturer should
be used.
TABLE 1A
If the ue and air ducts installed are not supplied by
POTTERTON COMMERCIAL, make sure they are
certied for the type of use and have a maximum pressure
drop as indicated in the table to the side.
∆P (Pa)
WH 50 – WH 60
WH 70 270
To optimise operating safety, make sure the ues are rmly xed to the wall with suitable brackets for every 1 metre of ue.
Make sure there is a minimum downward slope of 5 cm (3 degrees) per metre of duct towards the boiler.
SOME OUTLET FLUE INSTALLATION EXAMPLES AND THEIR RELATIVE MAXIMUM LENGTHS ARE SHOWN IN CHAP. "CON-
CENTRIC FLUES".
4. CONCENTRIC FLUES
This type of ue is used to discharge exhaust fumes and draw
combustion air both outside the building. The 87° concentric
bend allows the boiler to be connected to a ue-air in any direc-
tion as it can be rotated by 360° It can also be used as a supple-
mentary curve combined with a concentric ue or a 45° bend.
If fumes are discharged outside the building, the ue-air must
protrude at least 200 mm from the wall to allow weathering sur-
round to be tted and sealed to avoid water inltrations.
• The 87° bend reduces the total ue length by 1 metre.
• The 45° bend reduces the total ue length by 0.5 metres.
• The rst 87° bend is not included when calculating the maximum available length.
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11 7112240.02 (1-07/13)
A B Lmax = 10 m - Ø 80/125 mm
C D Lmax = 9 m - Ø 80/125 mm
E F Lmax = 10 m - Ø 80/125 mm
G Lmax = 8 m - Ø 80/125 mm
H Lmax = 9 m - Ø 80/125 mm

7112240.02 (1-07/13) 12
5. CASCADE FLUES
This type of duct evacuates the products of combustion of more than one boiler in a cascade connection through a shared fumes
collector. The collector may only be used to connect the boilers to the ue duct. Available diameters are: Ø125 mm - Ø160 mm
and Ø200 mm. A range of accessories is available on request.
BOILER
MODEL
MAXIMUM NUMBER OF BOILERS
IN A CASCADE CONNECTION
PARAMETER P60
Minimum power rpm
Ø125 mm
(200 kW Max)
Ø160 mm
(250 kW Max)
Ø200 mm
(500 kW Max) G20 G31
WH 50 4 5 10 1700 1700
WH 60 3 4 9 1620 1620
WH 70 2 3 7 1470 1470
In this outlet typology, a ue no-return valve, Ø 80/110 mm, must be tted to each boiler. Change the parameter P60 as shown
in table following the procedure described in chapter 14.
The ue header size must be calculated by a qualied technician during the system design stage, as required by current regula-
tions.
6. BOILER PUMP
The boiler is supplied without the circulation pump. This component must be installed on the heating return to allow water to circu-
late between the boiler and the low loss header and can be purchased off the shelf or supplied by POTTERTON COMMERCIAL
as an accessory (modulating pump).
• In the rst case the pump is installed on the heating return union near the boiler. To size it correctly see the Flow/Pres-
sure drops chart at the end of the manual in chap. "BOILER PUMP" (Size the pump in accordance to the delta t of the system
design).
• In the second case the pump is installed directly on the boiler removing the pipe on the internal circuit (rst remove the
front casing). For hydraulic performance data, see the Flow/Head charts at the end of the manual in chap. "BOILER PUMP".
The water in the system is circulated by the relative pumps, see chap. "BOILER PUMP". Check that the ow of the water circulat-
ing in the boiler is not less than the value indicated in the following table.
Model Minimum ow rate (l/h) Operating ow rate (l/h) with POTTERTON
COMMERCIAL low loss header
WH 50 800 1950
WH 60 1000 2100
WH 70 1500 2750

13 7112240.02 (1-07/13)
0
1
2
3
4
5
6
7
8
9
H (mH2O)
Q (l/h)
WH 50
WH 60
WH 70
HYDRAULIC RESISTANCE
WH 50 WH 60
WH 70
MODULATING PUMP OPERATION GRAPHS

7112240.02 (1-07/13) 14
7. PUMP CAPACITY/ HEAD
The hydraulic pump, supplied as an accessory kit from POTTERTON COMMERCIAL, is a modulating pump. The purpose of the
pump is to circulate the water between the boiler and the hydraulic separator.
KEY TO PUMP CHARTS - see chap. "BOILER PUMP"
QRATE OF FLOW
HHEAD
THE PUMP FLOW / HEAD CHARTS CAN BE CONSULTED IN CHAP. "BOILER PUMP".
8. ELECTRICAL CONNECTIONS
This machine is only electrically safe if it is correctly connected to an efcient earth system in compliance with current safety regu-
lations. Connect the boiler to a 230V single-phase earthed power supply using the supplied three core cable, observing correct
Live-Neutral polarity.
Use a double-pole switch with a contact separation of at least 3 mm.
When replacing the power supply cable, t a harmonised 3x0,75 mm2 cable with a maximum diameter of 8 mm. To access the
terminal block, remove the front boiler panel (xed with two screws at the bottom), turn the control box downwards and access
terminal blocks M1, M2, M3, used for the electrical connections, after removing the protective cover. The 3.15 A fast-blowing fuses
are incorporated in the power supply terminal block (to check and/or replace the fuse, pull out the black fuse carrier).
SEE WIRING DIAGRAM IN CHAP. "ELECTRICAL CONNECTION"
Make sure that the overall rated power input of the accessories connected to the appliance is less than 2A. If it is higher, install
a relay between the accessories and the electronic board.
The connections in terminal blocks M1- M3 are high voltage (230 V). Before making connections, make sure the appliance is
disconnected from the power supply. Check the input polarity on terminal block M1: L (LINE) - N (NEUTRAL).
TERMINAL BLOCK M1
(L) = Live (brown)
(N) = Neutral (light blue).
= Earth (yellow-green).
(1) (2) = contact for Room Thermostat.
Put back the jumper on terminals 1-2 of boiler terminal block
M1 if the room thermostat is not used or if the Remote Control
is installed.
TERMINAL BLOCK M2
Terminals 1 (back-lighting) - 2 (earth) - 3 (+12V): connection to the
Remote Control (low voltage) supplied as an accessory.
Terminals 4 - 5 (common): Outdoor temperature sensor (supplied
as an accessory)
Terminals 6 - 5 (common): 2nd Auxiliary Sensor (sensors for solar
plant, cascade system, zone system, etc.).
Terminals 7 - 5 (common): 1st Auxiliary Sensor (sensors for solar
plant, cascade system, zone system, etc.).
Terminals 9-10: storage tank sensor connection.
Terminal 8: not used.
TERMINAL BLOCK M3
Terminal 1-2: boiler pump supply 230 V AC (max 1 Amp)
Terminal 3-4: not used
Terminal 5-6: PWM signal of the modulating pump
Terminal 7-8: safety connection contact.
Terminal 9 - 10: Domestic Hot Water tank pump (max 1 Amp)
Terminal 11 - 12: Heating System pump (device connected downstream of the hydraulic separator - max 1 Amp)
If the appliance is connected to an underoor system, install a limit thermostat to prevent the circuit from overheating.
Use the relative cable grommets at the bottom of the boiler to thread the cables through to the terminal blocks.




















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
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15 7112240.02 (1-07/13)
ILLUSTRATED WIRING DIAGRAMS
M1
3
2
1
4
5
6
7
8
12
13
14
15
17
16
18
19
11
10
9
X10X11X12 X13X14X1 X2
X23
X70
X60
X22
X50
X42X41X40
X30X21X20
B
B
V
N
R
C
CR
R
B
BCMVN
M
N
C
V
NVMCCC
CC
N
V
b
a
M
C
G/V
G/V
G/V
G/V
G/V
G/V
G/V
G/V
1 15
M N P Y B R
L N
1
2
M
C
G/V
G/V
N
M
N
C
M
10
9 8 7 6 5 4 3 2 1
M2
V
V
V
V
M3
CR_0377_UK
20
21
BNR
N
V
C
C
R
R
N
M
VN NR
C
M
M
C
22
C
M
L
N
L
N
230 V
230 V
X50
on
21
on
21
on
21
U+
BX22
M
BX21
2HM
X2
AGU2.5
1X1X
QX21
N
QX22
N
QX23
NL
21
ON
13
CM
C
M
M
C
M
C
R
N
N
V
R
12
11
10
9
6 5 4 3 2 1
Y
P
NM
C
G/V
31
23
3
2
1
8 7
24
1 Fuses 2 230 V Power Supply IN 3 Room Thermostat (RT) – Volt free 4 Heating Flow NTC Sensor 5 Heating Return NTC Sensor 6 Water pressure sensor 7 Fumes Sensor 8 DHW tank Sensor 9 Auxiliary Sensor 1
10 Auxiliary Sensor 2
11 Outdoor sensor
12 Remote Control 13 Boiler pump 14 Sensing electrode 15 Spark electrode 16 Spark generator 17 Gas valve 18 Safety Thermostat 105°C 19 Fan 20 Heating circuit pump 21 DHW tank pump 22 AGU 2.550 23 Gas pressure switch 24 Safety connection
C Blue
M Brown
N Black R Red
G/V Yellow/Green
V Green
B White
G Grey
Y Yellow P Violet

7112240.02 (1-07/13) 16
9. ACCESSORIES NOT INCLUDED IN THE PACKAGING
9.1 REMOTE CONTROL
The wire (1) from the boiler terminal block M2 powers the display backlighting (12 V). It is not necessary to connect this wire to
make the Remote Control work.
To operate the boiler with the Remote Control mounted on the wall, purchase accessory A supplied with the base A1. Also see
the mounting and operation instructions supplied with the kit A. Proceed as follows:
• Switch off the boiler.
• Pass the three wires from the boiler terminal block M2 through the hole in the base A1 to apply to the wall.
• Connect wires 1-2-3 of the boiler terminal block M2 to terminals (1)-(2)-(3) of the base terminal block A1 respectively.
• Fix the base A1 to the wall using the expansion grips and screws supplied with the accessory.
• Apply the Control Panel A to the base xed to the wall, taking care not to apply excessive force.
• Power the boiler making sure that the Remote Control lights up.
A1
AA - A1
A
A1 A1 A
B
B1
B
B1
AControl Panel A1 Base for wall-mounted Control Panel
BLed interface accessory B1 Base for Led interface accessory
(1) Display backlighting +12V (2) Earth connection (3) Power input/Signal +12V
Use the Remote Control to set the programmable timer for heating and DHW. See the instructions supplied with the acces-
sory.
SETTING PARAMETERS USING THE REMOTE CONTROL
SYMBOLS FOR REMOTE CONTROL
Turn knob BDisplay shows
Press knob BPress button A and knob Btogether
Press button Aor CPress buttons A and Ctogether
KEY TO FIGURE MENU
1Enduser 3Engineer
2Commissioning 4OEM
ALL MODIFIED PARAMETERS SHOULD BE NOTED
DOWN IN THE TABLE AT THE END OF THIS MANUAL.
The following procedure is used to access the four boiler pro-
gramming menus:
• from the main menu C.
• A and C (hold down for approx. 6 seconds)
Bmenu 1-2-3-4 (see gure to side and key).
• C to go back one menu at a time to the main menu.
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
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  

17 7112240.02 (1-07/13)
When the Control Panel is wall-mounted enable the Room Temperature Sensor and ow temperature modulation as follows:
A) ROOM SENSOR
• Access menu 2.
• BOperator unit B to conrm.
• B programme row 40 (Used as) B.
• B (anti-clockwise) Room unit 1 B to conrm (the room sensor is now active).
• C to return to the previous menu then BConguration B.
• B programme row 5977 (Function input H5) then B to conrm.
• B None B to conrm.
B) FLOW TEMPERATURE MODULATION
To set ow temperature modulation, disable parameter 742 (HC1). Proceed as follows:
• Access menu 2.
• BTemps / mode CH1 B to conrm B742 (Flow temp setpoint room stat) B to conrm.
• B (anti-clockwise) "---" then B to conrm.
If, when turning the knob B on the main menu, the display shows the boiler ow temperature instead of the ambient tempera-
ture, parameter 742 has not been set correctly.
After every system conguration (e.g.: solar combination, connection an external storage tank, etc.) perform the following proce-
dure to update the boiler board to the new conguration:
• Access menu 2 as indicated at the beginning of this section.
• BConguration B B programme row 6200 then B.
• BYes then B to conrm.
ZONE SYSTEM WITH INSTALLATION OF THE REMOTE CONTROL
The electrical connection and the adjustments required to manage a system divided into zones with use of the Remote Control dif-
fers according on the accessories connected to the boiler. To install and congure, see the instructions of the Expansion Module
supplied as an accessory.
ADJUSTING THE TEMPERATURE OF THE HIGH TEMPERATURE HEATING SYSTEM
To avoid frequent starting and stopping, raise the minimum temperature setpoint of the boiler in the heating mode by setting pa-
rameters 740, to not less than 25°C, using the procedure described in point B.
TEMPERATURE ADJUSTMENT ON LOW TEMPERATURE HEATING SYSTEM
For a low temperature system (such as underoor heating), reduce the maximum CH temperature setpoint on the boiler by setting
parameter 741 (point B) to a value not greater than 55°C.
9.2 OUTDOOR SENSOR
The outdoor sensor must be installed on an external wall of
the building that is to be heated (see chap. "OUTDOOR SEN-
SOR"), considering the following instructions:
• work on a wall facing north/north-east (avoid direct sunshine;
• do not install on walls subject to the formation of damp or
moss (identify the presence of thermal bridges;
• do not install near fans, steam outlets or chimneys (it is im-
portant to avoid the external temperature controlled by the
probe being in uenced by external agents;
• ensure that the thickness of the wall used is suitable for
obtaining good heat insulation (do not  x it to metal walls).
To connect this accessory, see gure to side (terminals 4-5) and the instructions supplied with the sensor.
With the outdoor sensor connected, press buttons on the control panel to move the set climate curve Kt in parallel (see
chap. "OUTDOOR SENSOR" and parameter P03 in the table in section 14). To increase room temperature press +, to decrease
press -.
SETTING THE "Kt" CLIMATE CURVE
To set the required kt climate curve, proceed as follows:
• Access the menu as described in section 14.
• Select parameter P03.
• Select the climate curve from among those available, see the curve chart in chap. "OUTDOOR SENSOR" (the preset curve
is 1.5).
KEY TO CURVE CHART Kt - see chap. "OUTDOOR SENSOR"
Flow temp Outside temp
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
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7112240.02 (1-07/13) 18
WEATHER COMPENSATION CURVE GRAPHS
QAC34
9.3 WIRING OF BOILER PUMP
Connect the boiler pump to terminals 1-2 of the M3 terminal block as described in section 3. If the pump is a modulating pump
connect the PWM signal to the termials 5-6 of the M3 terminal block.
9.4 HEATING SYSTEM PUMP
Install the system pump downline from the hydraulic separator. Choose the pump according to the required system capacity/head
characteristics (see chap. "BOILER PUMP").

19 7112240.02 (1-07/13)
9.5 DOMESTIC HOT WATER CYLINDER
The boiler can be electrically connected to an external storage tank. A diagram of the hydraulic connection of the external stor-
age tank is shown in chap. "DIAGRAMS". Connect the storage tank pump to terminals 4-5 of the M3 terminal block (see chap.
"ELECTRICAL CONNECTION"). Install the storage boiler downline from the hydraulic separator. Use the sensor supplied as an
accessory and connect it to terminals 9-10 of terminal block M2 (see chap. "ELECTRICAL CONNECTION"). Make sure that the
exchange capacity of the domestic hot water coil is appropriate for the power of the boiler.
9.6 MIXED ZONES (see chap. "DIAGRAMS")
A mixed zone can be managed using the AVS75 external module, supplied as an accessory. This accessory can manage: a zone
pump, a mixing valve, a temperature sensor, a limit thermostat and a room thermostat. To connect the components and adjust the
system read the manual provided with the accessory.
9.7 OUTDOOR SYSTEM MANAGEMENT MODULES
The boiler can independently manage up to three heating circuits by using external accessories such as room units, remote con-
trols and external modules (AVS 75). The boiler electronics also comprises a wide range of functions for personalising and man-
aging various system types. To assure correct system operation, a number (from 1 to 3) must be assigned to each accessory in
order to allow the boiler board to recognise it. Consequently, carefully read the instructions provided with the accessories.
9.8 BOILERS IN A CASCADE CONNECTION (see chap. "DIAGRAMS")
The AVS75 external unit, supplied as an accessory, is used to manage a heating system with up to 16 boilers connected in a
cascade arrangement and a possible separate storage tank providing domestic hot water. This accessory, connected to one of
the cascade boilers, can directly control the circuit components up to a maximum of 3 independent relay outlets, 2 temperature
sensors, 1 high voltage limit thermostat connector and one 1 control input (e.g.: room thermostat). The system also requires an
OCI 345 interface on each boiler comprising in the cascade arrangement.
THE HYDRAULIC DIAGRAMS OF THE CASES DESCRIBED CAN BE FOUND IN CHAP. "DIAGRAMS".
9.9 AGU 2.550
Use the AGU 2.550 , already installed in the boiler, to send information from the boiler
as described below to a BMS panel.
ELECTRICAL CONNECTION
X1 (L-N) Power supply (230V 50Hz AC) connected to the boiler terminal
block M1 (C+M)
X1 (QX21) Not used
X1 (QX22-N) Boiler OPERATION (light on = run)
X1 (QX23-N) Boiler ALARM (light on = lockout)
X2 (H2-M) INPUT Electrical Signal 0÷10 V
9.10 CONNECTING THE ROOM THERMOSTAT
The connections in terminal block M1 are in high voltage (230 V). Before making connections, make sure the appliance is
disconnected from the power supply. Check the polarity: L (LIVE) - N (NEUTRAL).
To connect the Room Thermostat to the boiler, proceed as de-
scribed below:
• Switch off the boiler;
• Access the terminal block M1;
• Remove the jumper from the ends of contacts 1-2 and con-
nect the wires of the volt free Room Thermostat;
• Switch on the boiler and make sure the Room Thermostat
works correctly.
0÷10 V
Input Signal
CG_2241
~
230 V
(Boiler M1)
ALARM
SIGNAL LAMP
230V
STATUS (RUN)
SIGNAL LAMP
230V
Min. 200 mm
1500mm

7112240.02 (1-07/13) 20
10.COMMISSIONING THE BOILER
To light the boiler correctly, proceed as follows:
• Check that the system pressure is correct (section 6);
• Power the boiler;
• Open the gas tap;
• Select the required heating mode (section 1.2).
During initial ignition, the burner may not ignite (causing the boiler to shut down) until any air in the gas pipes is vented.
In this case, repeat the ignition procedure until gas reaches the burner. To reset boiler operation, press for at least 2
seconds.
Key to BUTTONS
DHW temperature adjustment
(+to increase the temperature and – to decrease it)
Heating water temperature adjustment
(+to increase the temperature and – to decrease it)
Boiler operating information
Operating mode:
DHW – DHW & Heating – Heating Only
Off – Reset – Exit menu/functions
Key to SYMBOLS
Off: heating and DHW disabled
(only boiler frost protection is active) Burner lit
Fault preventing the burner from lighting DHW operating mode enabled
Boiler/system water pressure low Heating mode enabled
Technical Service Centre call-in Programming menu
Manually resettable fault ( ) Boiler information menu
Fault in progress Set unit of measurement (SI/US)
11.FILLING THE SYSTEM
The pressure displayed on the pressure gauge has to be between 1 - 1.5 bar, with the system cold. If it is lower, turn the system
lling tap installed by the tter.
IMPORTANT: open the tap very slowly in order to vent the air.
The boiler is tted with a hydraulic pressure switch which prevents the boiler from working if there is no water.
If pressure drops occur frequently (monthy basis), have the system checked by the Authorised technical service agent.
12.SYSTEM AIR EXTRACTION FUNCTION
This function is used to facilitate the elimination of the air inside the heating circuit when the boiler is rst installed or after mainte-
nance when the water is drained from the primary circuit and re-lled.
To enable the system air extraction function press buttons together for 6 seconds. When the function is active, On appears
on the display for a few seconds, followed by programme row 312.
The electronic board will activate a pump on/off cycle lasting 10 minutes. The function will automatically stop at the end of the
cycle. To manually exit this function, press the above buttons together for 6 seconds once again.
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