SCHUSTER SWG A 23 Datasheet

SWG
ENGLISH
INSTALLATION AND SERVICING MANUAL
A 23 - R 23 A 23 P
C 16
C 18- R18
C 24 - R 24 C 24 P
C 28 - R 28 C 28 P
C 32 C 32 P

2
Provisions for proper disposal of the product in accordance with Directive 2002/96/EC
At the end of its life cycle the product must not be disposed of as urban waste. It can be taken to
a special recycling centre managed by the local authorities, or to a dealer who offers this service.
Separate disposal of a domestic appliance avoids possible negative consequences for the
environment and human health deriving from inappropriate waste handling and allows the recovery
of the materials of which it is made, in order to obtain signicant energy and resource savings.

3
ENGLISH
GENERAL INFORMATION
TECHNICAL FEATURESINSTALLATION INSTRUCTIONSMAINTENANCE INSTRUCTION
Attention: this manual contains instructions for the exclusive use of the professionally qualied installer
and/or maintenance technician in compliance with current legislation.
The user is NOT qualied to intervene on the boiler.
The manufacturer will not be held liable in case of damage to persons, animals or objects resulting from
failure to comply with the instructions contained in the manuals supplied with the boiler.
2 TECHNICAL FEATURES AND DIMENSIONS................................................................................................10
2.1 Technical features .................................................................................................................................10
2.2 Main components view and dimensions................................................................................................ 10
2.3 Available ow rate / pressure diagram ..................................................................................................13
2.4 Operation data.......................................................................................................................................14
2.5 General features....................................................................................................................................14
4 MAINTENANCE INSTRUCTIONS ..................................................................................................................28
4.1 Inspection and maintenance instructions ..............................................................................................28
4.2 Parameters that can be edited from the control panel ..........................................................................30
4.3 Adaptation of the power to the heating system .....................................................................................31
4.4 Important notes .....................................................................................................................................32
4.5 Wiring diagram ......................................................................................................................................32
4.6 Error codes............................................................................................................................................34
3 INSTALLATION INSTRUCTIONS ...................................................................................................................15
3.1 General warnings ..................................................................................................................................15
3.2 Installation standards ............................................................................................................................15
3.3 Preventive system verication and adjustment operations ...................................................................15
3.4 Packaging..............................................................................................................................................16
3.4 Positioning the boiler .............................................................................................................................17
3.6 Flue gas exhaust pipe connection......................................................................................................... 18
3.7 Connections ..........................................................................................................................................21
3.8 Filling the system................................................................................................................................... 21
3.9 Electrical connections............................................................................................................................22
3.10 Commissioning................................................................................................................................... 23
3.11 Measurement of combustion efciency during installation ....................................................................24
3.11.1 Unblock button with calibration function.................................................................................... 24
3.11.2 Probes positioning ....................................................................................................................24
3.12 Burner adjustment .................................................................................................................................25
3.12.1 Electric minimum adjustment .................................................................................................... 27
3.12.2 Adaptation of the power to the heating system.........................................................................27
1 GENERAL INFORMATION ...............................................................................................................................4
1.1 General warnings ....................................................................................................................................4
1.2 Symbols used in the manual ...................................................................................................................5
1.3 Appropriate use of appliance................................................................................................................... 5
1.4 Information for system manager.............................................................................................................. 5
1.5 Safety warnings.......................................................................................................................................6
1.6 Technical data plate................................................................................................................................. 7
1.7 Water Treatment......................................................................................................................................8
1.8 Boiler antifreeze protection...................................................................................................................... 8

4
1GENERAL INFORMATION
Any product repairs must be performed solely by
personnel authorised, using original spare parts only.
Failure to comply with the above can compromise
the safety of the appliance and void the warranty.
To guarantee appliance efciency and its correct
operation, yearly maintenance must be performed
by qualied personnel.
Should you decide not to use the appliance, parts
entailing potential sources of hazard must be made
safe.
Before commissioning an appliance that has not
been used, wash the domestic hot water production
system, making the water ow until it has been fully
replaced.
Should the appliance be sold or transferred to a new
owner or if you move and leave the appliance, always
make sure that the instruction booklet accompanies
it in order to be consulted by the new owner and/or
installer.
Only original accessories must be used for all appli-
ances with optionals or kits (including electric).
This appliance is intended solely for the use for which
it was expressly designed.
Any other use is to be considered improper and
therefore dangerous (*).
1.1 - GENERAL WARNINGS
The instruction booklet is an integral and essential
part of the product and must be kept by the user.
Read the warnings contained in this instruction
booklet carefully as they provide important guidelines
regarding installation, use and maintenance safety.
Keep the booklet with care for further consultation.
Your appliance must be installed and serviced in
compliance with the standards in force according
to the manufacturer instructions, up to standard
and by legally qualied and certied personnel.
Systems for the production of domestic hot wa-
ter MUST be constructed entirely with compliant
materials.
By professionally qualied personnel we mean:
personnel with specic technical skill in the eld
of heating system components for civil use, do-
mestic hot water production and maintenance.
Personnel must have the qualications provided
for by current legislation.
Incorrect installation or improper maintenance
can cause damage to persons, animals or objects
for which the manufacturer is not responsible.
Before performing any cleaning or maintenance,
disconnect the appliance from the energy mains by
acting on the switch of the system and/or through
the specic cut-off devices.
Do not obstruct the terminals of the intake/exhaust
ducts.
In the event of failure and/or malfunctioning of the
appliance, switch it off and do not try to repair it or
intervene on it directly. Contact only personnel qual-
ied in compliance with law.

5
1.2 - SYMBOLS USED IN THE MANUAL
Pay special attention when reading this manual to the parts marked by the symbols:
NOTE!
Tips
for the user
ATTENTION!
Possible dangerous
situation for the product
and the environment
DANGER!
Serious danger
to safety
and health
1.3 - APPROPRIATE USE OF APPLIANCE
The SWG boiler has been built according to the current level of engineering and ac-
knowledged technical safety rules.
Nonetheless, if improperly used, dangers could arise for the safety and life of the user
and other persons or damage to the equipment or other objects.
The appliance is designed to work in heating systems, with hot water circulation, for
the production of domestic hot water.
Any other use must be considered improper.
The manufacturer will not be held liable for any damage resulting from improper use.
Use according to the intended purposes also includes strict compliance with the in-
structions in this manual.
The user must be instructed concerning the use and operation of his heating system, in particular:
• Deliver these instructions to the user, as well as other documents concerning the appliance
inserted in the envelope inside the packaging. The user must keep this documentation
safe for future consultation.
• Inform the user about the importance of the air vents and the ue gas exhaust system, high-
lighting their essential features and the absolute prohibition of modifying them.
• Inform the user concerning controlling the system's water pressure as well as operations to
restore it.
• Inform the user concerning correct temperature control, control units/thermostats and radiators
for saving energy.
• Please note that, in compliance with the standards in force, the inspection and maintenance of
the appliance must be carried out in compliance with the regulations and frequency indicated
by the manufacturer.
• Should the appliance be sold or transferred to a new owner or if you move and leave the ap-
pliance, always make sure that the instruction booklet accompanies it in order to be consulted
by the new owner and/or installer.
The manufacturer will not be held liable in the event of damage to persons, animals or
objects resulting from failure to comply with the instructions contained in this manual.
1.4 - INFORMATION PROVIDED TO THE USER

6
1.5 - SAFETY WARNINGS
ATTENTION!
The boiler must not be used by people with with reduced physical, sensory and mental
abilities, without experience and knowledge. These people must be previously trained
and supervised during the manoeuvre operations. Children must be supervised so that
they do not play with the appliance.
ATTENTION!
The appliance must be installed, adjusted and maintained by professionally qualied
personnel, in compliance with the standards and provisions in force. Incorrect instal-
lation can cause damage to persons, animals and objects for which the manufacturer
cannot be held responsible.
DANGER!
NEVER attempt performing maintenance or repairs on the boiler on your own initiative.
Any work must be done by professionally qualied personnel. We recommend stipulat-
ing a maintenance contract.
Insufcient or irregular maintenance can jeopardise the operating safety of the appli-
ance and cause damage to persons, animals and objects for which the manufacturer
cannot be held responsible.
Changes to the parts connected to the appliance (once the appliance installation is complete)
Do not modify the following parts:
- the boiler
- the gas, air, water and electricity supply lines
- the ue gas pipe, the safety valve and the exhaust pipe
- the construction parts which affect the operating safety of the appliance
Attention!
To tighten or loosen the screwed ttings, use only appropriate xed spanners.
Incompliant use and/or inappropriate tools can cause damage (e.g. water or gas leakage).
ATTENTION!
Indications for propane gas-red appliances
Make sure that the gas tank has been deaerated before installing the appliance.
For state-of-the-art tank venting, contact the LPG supplier or person qualied in compliance
with the law requirement.
If the tank has not been professionally deaerated, ignition problems could arise.
In that case, contact the supplier of the LPG tank.
Smell of gas
Should a smell of gas be perceived, follow these safety guidelines:
- do not turn electric switches on or off
- do not smoke
- do not use the telephone
- close the gas shut-off valve
- air out the area where the gas leakage has occurred
- inform the gas supplier or a company specialised in installation and maintenance of heating
systems.
Explosive and easily ammable substances
Do not use or store explosive or easily ammable materials (e.g. petrol, paints, paper) in the
room where the appliance is installed.

7
ENGLISH
GENERAL INFORMATION
1.6 - TECHNICAL DATA PLATE
CE marking
The CE marking certies that the boilers meet:
- The essential requirements of the gas appliance
directive (directive 2009/142/EEC)
- The essential requirements of the electromagnetic
compatibility directive (2004/108/EEC)
- The essential requirements of the efciency di-
rective (92/42/EEC)
- The essential requirements of the efciency di-
rective (directive 2006/95/EEC)
KEY:
1 = CE monitoring body
2 = Type of boiler
3 = Boiler model
4 = Number of stars (directive 92/42 EEC)
5 = (S.N°) Serial Number
6 = P.I.N.ProductIdenticationNumber
7 = Typesofapproveduegasexhaustcongurations
8 = (NOx)NOxClass
A = Heatingcircuitcharacteristics
9 = (Pn) Effective nominal output
10 = (Pcond) Effective output in condensation
11= (Qmax)Maximumheatoutput
12= (AdjustedQn)Adjustedforratedheatoutput
13= (PMS)Max.heatingoperatingpressure
14= (Tmax)Max.heatingtemperature
B = Domestichotwatercircuitcharacteristics
15= (Qnw)Ratedheatoutputindomestichotwaterfunction
(if different to Qn)
16= (D)SpecicD.H.W.owrateaccordingtoEN625-EN
13203-1
17= (Rfactor)No.oftapsaccordingtothedeclaredamountof
water(EN13203-1)
18= (Ffactor)No.ofstarsaccordingtothedeclaredqualityof
thewater(EN13203-1)
19= (PMW)Max.domestichotwateroperatingpressure
20= (Tmax)Max.domestichotwatertemperature
C = Electricalcharacteristics
21= Electricalpowersupply
22 = Consumption
23 = Protection rating
D = Countries of destination
24 = Direct and indirect countries of destination
25 = Gas category
26 = Supply pressure
E = Factory settings
27 = Adjusted for gas type X
28 = Space for national brands
The technical data plate is located
inside the boiler on the back at the
bottom

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1.7 - WATER TREATMENT
The treatment of the supply water
allows to prevent inconveniences
and maintain the functionality and
efciency of the generator over time.
The ideal water pH in heating systems
must be within:
To minimise corrosion, it is crucial to
use a corrosion inhibitor; in order for
it to work properly, the metal surfac-
es must be clean.
(see system protection ACCESSO-
RIES sect. in domestic price list)
ATTENTION (*) see general warnings
1.1:
The heating only models are NOT
suitable for the production of water
for human consumption according
to Ministerial Decree D.M. 174/2004.
ATTENTION!
ANY DAMAGE TO THE BOILER
CAUSED BY THE FORMATION OF
FOULING OR BY CORROSIVE WA-
TER WILL NOT BE COVERED BY THE
WARRANTY.
1.8 - BOILER ANTIFREEZE
PROTECTION
To activate the antifreeze function, position
the two knobs as shown in the gure.
This protection can intervene only if
the electricity and gas supplies are
connected.
If one of the two is not available and upon
reset 11 (SR) a temperature of < 2 °C is
detected, the appliance will behave as
described in tab. pos 2.
The heating system can be protected
effectively from frost by using antifreeze
products with inhibitor for heating
systems.
Do not use car engine antifreeze
products as they could damage the
water gaskets.
VALUE MIN MAX
PH 6.5 8
Hardness [°fr] 9 15
P
O
S
ANTIFREEZE FUNCTION
Power supplies 11 - SR (*) Status
function
antifreeze
Actions
Electric Gas
1ON ON < 6 °C ON - Burner and Pump ON until T > 14°C
2
ON OFF
< 2 °C ON
Only when both the power supplies are ON:
- Burner and Pump OFF until T > 5°C
- When T > 5°C then Burner and Pump
ON until T > 14°C.
OFF ON
OFF OFF
(*) Sensor 11 par. 2.2

9
ENGLISH
TECHNICAL FEATURES
2TECHNICAL FEATURES
AND DIMENSIONS
2.1 - TECHNICAL FEATURES
2.2 - VIEW WITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS
SWG A 23 SWG A 23 P
SWG A 23 - SWG R23 - SWG A 23 P

10
View from above
View from below
SWG C 24 P
SWG C 18 - SWG C 24
SWG C 16 - SWG C 18 - SWG R 18 - SWG C 24 - SWG R 24 - SWG C 24 P

11
ENGLISH
TECHNICAL FEATURES
View from above
View from below
SWG C 28 P - SWG 32 PSWG C 28 - SWG C 32
SWG C 28 - SWG R 28 - SWG C 28 P - SWG C 32 - SWG R 32 - SWG C 32 P

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2.3 - DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR
INSTALLATION
KEY
No. C.E. S.E. Description
1 db SS Domestic hot water temper-
ature sensor
2 FLS Flow switch with cold water
lter
3 VG Gas valve
4 Fd E.
ACC/RIL
Ignition/detection electrode
5 Burner
6 Combustion chamber
7 AF TF Flue gas anti-overow ther-
mostat
8 Expansion vessel
9 FR
HT
Heat exchanger
10 HL TL Safety thermostat
11 Hb SR Heating temperature sensor
12 Ht P Pump
13 Lp DK Water deciency pressure
switch
14 Boiler drain valve
15 Filling valve
16 Diverter valve
17 Plate heat exchanger
18 FL
FH
VM Fan
19 AF
AS
PV Flue gas pressure switch
20 Safety valve
21 Automatic by-pass
CDomestic hot water
outlet
G ½
G Gas inlet G ¾
F Cold water inlet G ½
MHeating system ow G ¾
RHeating system re-
turn
G ¾
Rc Filling valve
Sc Boiler drain
Svs Safety valve drain
C.E. = ERROR CODES see
par. 4.6
S.E. = WIRING DIAGRAM
KEY see par. 4.5
Flow rate (l/h)
Avaible Head (m.c.a.) metres of water

13
ENGLISH
TECHNICAL FEATURES
2.5 - GENERAL FEATURES
2.4 - OPERATING DATA ACCORDING TO UNI 10348
For the adjustment data: NOZZLES - PRESSURE - DIAGRAMS - FLOW RATES - CONSUMPTION refer
to the paragraph ADAPTATION TO OTHER TYPES OF GAS.
Attention: should the boilers be used to heat systems at low temperature (e.g. radiant panels), a mixer valve is required to avoid
condensation forming.
SWG A23/R23 C16 C18/R18 C24/R24 C28/R28 C32
Maximumthermalowrate kW 25,5 16 (26,5) 20,5 26,5 30,1 34,5
Minimumthermalowrate kW 11,5 11,5 9,0 11,5 11,5 13,5
Effective nominal output kW 22,9 14,6 18,5 24,6 28 31,6
Minimumeffectiveoutput kW 9,9 10,1 7,8 10,1 10,2 11,6
Effectiveefciencyatnominalload(100%) %89,9 91,05 90,4 92,92 93,18 91,69
Effectiveefciencyrequired(100%) %89,72 89,33 89,54 92,78 92,9 90,0
Effectiveefciencyat30%load %89,43 89,48 90,23 90,23 90,42 90,42
Effectiveefciencyrequired(30%) %87,08 86,49 86,80 90,17 90,34 87,5
Number of stars (according to 92/42 EEC) n.
Combustionefciencywithnominalload(100%) %91 91,13 91,57 93,72 94,46 93,59
Combustionefciencywithreducedload %88 88,92 83,41 88,92 88,78 87,16
Heatlossatcasing(min.-max.) % 1,68-1,11 1,1-0,1 2,78-1,17 0,86-0,80 0,27-1,28 0,61-1,90
(*)Fluegastemperaturetf-ta(max.) %107,5 92,3 121,5 109 103,5 120,9
Fluegasmassowrate(min.-max) g/s 16,76-8,85 14,21-14,1 14,32-13,0 14,21-13,89 14,7-14,6 17,2-16,6
Excessλair %122,09 156,9 80,61 46,94 35,3 33,84
CO2 % 2,4-5 3,0-4,3 2,3-6,2 3,0-7,7 2,9-8,4 2,9-8,5
NOx(WeightedvalueaccordingtoEN297/A3orEN483) mg/kWh 189,2 178,59 178,59 178,59 186,6 178,21
NOxClass 2 2 2 2 2 2
Heatlossatchimneywithburneron(min.-max.) % 11,97-9,02 11,08-8,87 8,43-16,59 11,08-6,28 11,2-5,5 12,8-6,4
Heatlossatchimneywithburneroff %0,657 0,354 0,457 0,354 0,32 0,280
Notes:(*)RoomTemperature=20°CDatadetectedwithappliancerunningonMethanegas(G20)
SWG A 23 R23 C 16 C 18 R18 C 24 R24 C 28 R28 C 32
Appliance category
II2H3P II2H3P II2H3P II2H3P II2H3P II2H3P
Minimumheat.circuitoutput(∆t20°C) l/min 7,12 7,26 5,56 7,26 7,3 8,28
Minimumheatingcircuitpressure bar 0,5 0,5 0,5 0,5 0,5 0,5
Maximumheatingcircuitpressure bar 3 3 3 3 3 3
Primary circuit content l3 3 3 3 3,5 3,5
Maximumoperatingtemperatureinheat. °C 78 78 78 78 78 78
Minimumoperatingtemperatureinheat. °C 45 45 45 45 45 45
Expansionvesseltotalcapacity l6 6 6 6 8 10
Expansionvesselpre-load bar 1 1 1 1 1 1
Maximumsystemcapacity(maxtemp.calc.) l138 138 138 138 184 230
Minimumdomestichotwatercircuitowrate l/min. 2,5 -2,5 2,5 -2,5 -2,5 -2,5 -
Minimumdomestichotwatercircuitpressure bar 0,5 -0,5 0,5 -0,5 -0,5 -0,5 -
Maximumdomestichotwatercircuitpressure bar 6-6 6 -6-6-6-
Domestichotwaterspecicowrate(∆t30°C) l/min. 10,5 -11,5 8,5 -11,5 -13,5 -15,2 -
Domestichotwaterowratelimiter l/min. 10 -10 8 -10 -12 -14 -
ProductionofD.H.W.incontinuousoperationwith∆t45K l/min. 7,8 -7,6 8 -7,6 -8,9 -9,9 -
ProductionofD.H.W.incontinuousoperationwith∆t40K l/min. 8,8 -8,6 6,3 -8,6 -10,1 -11,1 -
ProductionofD.H.W.incontinuousoperationwith∆t35K l/min. 10 -9,8 7,2 -9,8 -11,5 -12,7 -
ProductionofD.H.W.incontinuousoperationwith∆t30K l/min. 11,7 -11,4 8,4 -11,4 -13,4 -14,9 -
ProductionofD.H.W.incontinuousoperationwith∆t25K(*) l/min. 14,1 -13,7 10,1 -13,7 -16,1 -17,8 -
Temperatureadjustableindomestichotwatermode °C
35-57 - 35-57 35-57 - 35-57 - 35-57 - 35-57 -
Voltage/Frequencyelectricpowersupply V-Hz 230/50 230/50 230/50 230/50 230/50 230/50
Fuseonthepowersupply A (F) 2 2 2 2 2 2
Maximumabsorbedoutput W85 138 138 138 138 150
Protection rating IP X4D X5D X5D X5D X5D X5D
Netweight kg 27,1 24,6 29,6 29,6 28,1 29,6 28,1 34,7 33,2 35,7 -
Grossweight kg 30 27,6 32,5 32,5 31 32,5 31 38 36,2 39 -
(*) mixed

14
2.6 - GENERAL FEATURES SWG P
OPERATING DATA ACCORDING TO UNI 10348 SWG P
Attention: should the boilers be used to heat systems at low temperature (e.g. radiant panels), a mixer valve is required to avoid
condensation forming.
SWG A 23 P C 24 P C 28 P C 32 P
Maximum thermal ow rate kW 25.5 26.5 30.1 34.5
Minimum thermal ow rate kW 11.5 11.5 11.5 13.5
Effective nominal output kW 22.9 24.7 28.1 32.3
Minimum effective output kW 9.9 10.1 10.2 12.2
Effective efciency at nominal load (100%) % 89.8 93.05 93.21 93.5
Effective efciency required (100%) % 89.72 92.78 92.90 93.02
Effective efciency at 30% load % 89.43 90.43 90.42 90.42
Effective efciency required (30%) % 87.08 90.18 90.34 90.53
Number of stars (according to 92/42 EEC) no.
Combustion efciencywithnominalload(100%) %91.36 93.21 94.6 94.57
Combustion efciency with reduced load % 88.5 88.06 89.52 88.76
Heat loss at casing (min.-max.) %2.0- 1.6 0.17 - 0.16 0.77-1.40 1.07-1.35
(*) Flue gas temperature tf-ta (max.) %95.5 119.3 96.3 101.4
Flue gas mass ow rate (min.-max) g/s 19.1-21.2 14.21-13.74 15.17-15.35 18.12-16.8
Excess λ air % 140.7 45.15 42.56 35.34
CO2%2.2-4.6 3.0-7.8 2.8-8.0 2.75-8.4
NOx(WeightedvalueaccordingtoEN297/A3orEN483) mg/kWh 189.2 184.16 186.00 164.05
NOx Class 2 2 2 2
Heat loss at chimneywithburneron(min.-max.) % 8.6-11.5 11.94-6.79 5.40-10.48 5.40-11.2
Heat loss at chimney with burner off %0.657 0.256 0.321 0.280
(*) Room Temperature = 20°C
SWG A 23 P C 24 P C 28 P C 32 P
Appliance category II2H3P II2H3P II2H3P
II2H3P
Minimum heat. circuit output (∆t 20 °C) l/min 7.1 7.2 7.3 8.7
Minimum heating circuit pressure bar 0.5 0.5 0.5 0.5
Maximum heating circuit pressure bar 3 3 3 3
Primary circuit content l 3 3 3.5 3.5
Maximum operating temperature in heat. °C 78 78 78 78
Minimum operating temperature in heat. °C 45 45 45 45
Expansion vessel total capacity l 6 6 8 10
Expansion vessel pre-load bar 1 1 1 1
Maximum system capacity (maxtemp.calc.of82°C) l 138 138 184 230
Minimum domestic hot water circuit ow rate l/min. 2.5 2.5 2.5 2.5
Minimum domestic hot water circuit pressure bar 0.5 0.5 0.5 0.5
Maximum domestic hot water circuit pressure bar 6 6 6 6
Domestic hot water specic ow rate (∆t 30 °C) l/min. 11 12 13.5 15.5
Domestic hot water ow rate limiter l/min. 10 10 12 14
Production of D.H.W. in continuous operation with ∆t 45 K l/min. 7.8 7.4 8.7 10.3
Production of D.H.W. in continuous operation with ∆t 40 K l/min. 8.8 8.3 9.8 11.6
Production of D.H.W. in continuous operation with ∆t 35 K l/min. 10.0 9.5 11.1 13.2
Production of D.H.W. in continuous operation with ∆t 30 K l/min. 11.7 11.0 13.0 15.4
Production of D.H.W. in continuous operation with ∆t 25 K (*) l/min. 14.1 13.2 15.6 18.5
Temperature adjustable in domestic hot water mode °C 35-57 35-57 35-57 35-57
Voltage/Frequency electric power supply V-Hz 230/50 230/50 230/50 230/50
Fuse on the power supply A (F) 2 2 2 2
Maximum absorbed output W 85 138 138 150
Protection rating IP X4D X5D X5D X5D
Net weight kg 28.6 30.1 35.2 36.2
Gross weight kg 31.5 33 38.2 39.2
(*) mixed

15
ENGLISH
INSTALLATION INSTRUCTIONS
3INSTALLATION INSTRUCTIONS
ATTENTION!
This boiler is intended solely for
the use for which it was expressly
designed. Any other use is to be
considered improper and therefore
dangerous.
This boiler heats water at a temper-
ature lower than the atmospheric
pressure boiling temperature.
Before connecting the boiler, have pro-
fessionally qualied personnel:
a) Thoroughly wash all the piping of
the system to remove any residues
or impurities which could jeopard-
ise proper operation of the boiler,
even from a hygienic point of view.
b) Check that boiler is set up to operate
with the available type of fuel.
This can be seen written on the
package and on the technical feature
plate;
c) Check that the chimney/ue has an
appropriate draught, without any bot-
tlenecks, and that no exhausts from
other appliances are inserted, unless
the ue has been
implemented to accommodate sev-
eral utilities according to specific
standards and regulations in force.
Only after this check can the tting
between the boiler and chimney/ue
be mounted;
ATTENTION!
If there is dust and/or if there are
aggressive/corrosive vapours
present in the installation room,
the appliance must be protected
suitably and must be able to
operate independently from the air
in the room.
ATTENTION!
Only mount the appliance on a closed
wall, made of non-ammable materi-
al, at, vertical so that the minimum
distances required for installation and
maintenance can be observed.
The boiler must be connected to a cen-
tral heating system and/or domestic hot
water supply network compatible with its
efciency and output.
3.1 - GENERAL WARNINGS
3.2 - INSTALLATION STANDARDS
It must be installed by a professionally qualied
technician, who shall take the responsibility of
observing all local and/or national laws published
in the ofcial journal, as well as the applicable
technical standards.
3.3 - PREVENTIVE VERIFICATION AND
VERIFICATION AND ADJUSTMENT
OPERATIONS

16
The SWG boiler is supplied completely assembled
in a sturdy cardboard box.
After having removed the appliance from
the packaging, make sure that the supply
is complete and undamaged.
The packaging elements (cardboard
box, straps, plastic bags, etc.) must be
kept out of the reach of children as
they are potential sources of danger.
The manufacturer will not be held liable
for damage to persons, animals or ob-
jects due to failure to comply with the
instruction above.
H
P
L
As well as the appliance, the packaging contains:
A DOCUMENTATION ENVELOPE
- System booklet
- User operating instructions booklet
- Instruction booklet for the installer and
maintenance engineer
B - Connection predisposition paper template
C - 2 rawlplugs for boiler attachment
D - Flue gas exhaust collector (RS - CS version only)
SWG P
depth
L
width
H
height
18÷24 kW 290 mm 470 mm 810 mm
28÷32 kW 380 mm
21
3.4 - PACKAGING

17
ENGLISH
INSTALLATION INSTRUCTIONS
When choosing the place of the installation of the
boiler, follow the safety instructions below:
- Place the boiler in rooms protected from frost.
- Avoid installation in rooms with a corrosive or very
dusty atmosphere.
- The appliance must only be installed on a vertical
and solid wall which can support its weight.
- The wall must not be made of ammable material.
SWG C 16 - SWG C/R 18 - SWG C/R 24 - SWG C
32 - SWG C 24/28/32 P
Since the temperature of the wall on which the boil-
er is installed and the temperature of the coaxial
exhaust pipe do not exceed, in normal operating
conditions, a room temperature beyond 60 K, it is
not necessary to observe the minimum distances
from ammable walls
For boilers with double intake and exhaust pipes, in
the event of crossing ammable walls, insert insula-
tion between the wall and the ue gas exhaust pipe.
SWG A 23 - SWG R 23
SWG A 23 P
Maintain a distance at the sides of at least 200 mm
from walls with ammable fabrics (e.g. curtains).
3.5 - POSITIONING THE BOILER
Clearance

18
1,5 m min.
Ventilation of the rooms
The boiler must be installed in an adequate room in
compliance with the standards in force.
3.6 - FLUE GAS EXHAUST PIPE CONNECTION
(3%) slope towards outlet
B11bs
FOR BOILERS WITH NATURAL DRAUGHT
To connect the ue gas exhaust pipe, local and na-
tional standards must be observed
In the event the boiler is replaced, ALWAYS re-
(1%) slope towards outlet
TOTAL LENGTH (LA + LS)
COAXIAL Ø60/100 DOUBLE Ø80
COLLECTOR COLLECTOR
WITH WITHOUT WITH WITHOUT
FROM
[m]
A
[m]
UP TO
[m]
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
0,5 1 3 1+1 8 + 8
40 (20A+20S)
TOTAL LENGTH (LA + LS)
COAXIALØ60/100 DOUBLE Ø80
COLLECTOR COLLECTOR
WITH WITHOUT WITH WITHOUT
FROM
[m]
A
[m]
UP TO
[m]
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
1 2,5 53 16 40(20A+20S)
COAXIALØ80/125 DOUBLE Ø60
COLLECTOR COLLECTOR
WITH WITHOUT WITH WITHOUT
FROM
[m]
A
[m]
UP TO
[m]
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
0.75 2.5 7 NA NA NA
Vertical exhaust and intake terminals directed
outside via coaxial or double pipes.
COAXIAL Ø80/125 DOUBLE Ø60
COLLECTOR COLLECTOR
WITH WITHOUT WITH WITHOUT
FROM
[m]
A
[m]
UP TO
[m]
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
NA NA NA NA NA NA
Distancebetween air inlet
pipeandfluegasexhaust
pipe:min250mm-max500.
Horizontal exhaust and intake terminals directed
outside via coaxial or double pipes.
C12
C32
FOR BOILERS WITH FORCED DRAUGHT
place the ue gas pipe as well.
The boiler is type approved for the exhaust congu-
rations listed below:
1,5 m min.
The combustion air is withdrawn directly from
the room where the boiler is installed.
Said room must be ventilated in compliance with
the standards.
NOTE!
Further details in the section
‘‘Technical Information’’
CAUTION
LT total length is a reference value for the dimen-
sioning of the ducts of A (intake) and S (Exhaust).
Subtracting the values of LT reported, at values
of bends / terminals / extensions you get the
value:
if > 0 = OK - POSSIBLE conguration
if < 0 = NO - WRONG conguration
Cps = Loss coefcient specify
Value referred to curves / terminals / extensions
Ø 60 - Ø 80 wich as to subtracted from LT.

19
ENGLISH
INSTALLATION INSTRUCTIONS
Collective chimney ue system, consisting of two
pipes, one for combustion air intake and the other
one for combustion products evacuation, coaxial
or double.
C42
TOTAL LENGTH ( LS)
DOUBLE Ø80
COLLECTOR
WITH WITHOUT
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
1 12 20
Connection to a combustion products evacuation
pipe outside the room; the combustion air is tak-
en directly from the room where the appliance is
installed.
TOTAL LENGTH (LA + LS)
DOUBLE Ø80 DOUBLE Ø60
COLLECTOR COLLECTOR
WITH WITHOUT WITH WITH-
OUT
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
FROM
[Cps]
A
[Cps]
UP TO
[Cps]
1+1
8+8 40
(20A+20S)
NA NA NA
Separate combustion air intake and combustion
products evacuation pipes.
These pipes can discharge into areas with different
pressure.
C52 B22
ATTENTION:
The ue must comply with standards
in force.
C62
Boiler intended for connection to a combustion
air intake and combustion products evacuation
system, approved and sold separately.
Connection to a terminal for combustion air intake
and ue gas exhaust via a single or collective
chimney.
C82
ATTENTION
for this type of con-
nection the room
follows the same in-
stallation rules for
boilers with natural
draught.

20
Collector
Collector assembly
GENERAL INFORMATION ON THE FLUE GAS EXHAUST SYSTEM
Rubber closure plugs
(remove 1 of the air intake plugs -
only with splitter systems)
KIT5570C 00361439
It is recommended to only use original
exhaust pipes.
The supplier will have no contractual
or extra-contractual liability for damage
caused due to incorrect installation and
use and in any case failure to comply
with the instructions provided by the
manufacturer.
(+) Adapter for double systems