Unical KONm Series Datasheet

ENGLISH
INSTALLATION AND SERVICING MANUAL
R 18 - C 18 - R 24 - C 24
R 28 - C 28 - R 35 - C 35
KONm

2
http://www.unicalag.it/prodotti/domestico-50/condensazione-gas/774/kon
Provisions for proper disposal of the product.
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 o󰀨ers 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
Installation Instructions Technical Features General information
Maintenance instructions
ENGLISH
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 ..................................................................................................14
2.4 Operation data.......................................................................................................................................15
2.4.1 Data according to the directive ErP.............................................................................................15
2.5 General features....................................................................................................................................16
4 MAINTENANCE INSTRUCTIONS ...............................................................................................................33
4.1 Inspection and maintenance instructions ..............................................................................................33
4.2 Parameters that can be edited from the control panel ..........................................................................35
4.3 Adaptation to the use of other gas .......................................................................................................36
4.5 Wiring diagram ......................................................................................................................................39
4.6 Error codes............................................................................................................................................41
3 INSTALLATION INSTRUCTIONS ................................................................................................................17
3.1 General warnings ..................................................................................................................................17
3.2 Installation standards ............................................................................................................................17
3.3 Preventive system verication and adjustment operations ...................................................................17
3.4 Packaging..............................................................................................................................................18
3.5 Positioning the boiler .............................................................................................................................19
3.6 Flue gas exhaust pipe connection.........................................................................................................20
3.7 Connections ..........................................................................................................................................23
3.8 Filling the system...................................................................................................................................24
3.9 Electrical connections............................................................................................................................25
3.10 Commissioning................................................................................................................................... 27
3.11 Measurement of combustion e󰀩ciency during installation .................................................................... 28
3.11.1 Calibration function activation ................................................................................................... 28
3.11.2 Probes positioning ....................................................................................................................28
3.12 Burner adjustment .................................................................................................................................29
3.12.1 Adaptation of the power to the heating system.........................................................................32
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......................................................................................................................9

4
1GENERAL INFORMATION
In case of failure and/or malfunctioning of the appli-
ance, switch it o󰀨 and do not try to repair it or inter-
vene on it directly. Contact only personnel qualied
in compliance with law.
Any repairs must be performed solely by personnel
authorised by Unical AG S.p.A., 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 e󰀩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.
Installation and maintenance must be performed
in compliance with the standards in force ac-
cording to the instructions of the manufacturer,
up to standard and by personnel qualied and
certied in compliance with law.
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-o󰀨 devices.
Do not obstruct the terminals of the intake/exhaust
ducts.

5
OBLIGATION!
wear gloves
protective
DANGER!
Danger of burns!
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 boiler has been built according to the current level of engineering and acknowledged
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 is considered improper.
For any damage resulting from improper use UNICAL AG. S.p.A. assumes no respon-
sibility.
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
NOTE!
For further details
refer to the Technical
Information:
at the web address
indicated
on page 2

6
1.5 - SAFETY WARNINGS
ATTENTION!
The boiler cannot be used by children.
The boiler can be used by adults and only after having carefully read the user’s ma-
nual. Children should be supervised to ensure that they do not play or tamper with
the device.
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.
Insu󰀩cient or irregular maintenance can jeopardise the operating safety of the appliance
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 a󰀨ect 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 o󰀨
- do not smoke
- do not use the telephone
- close the gas shut-o󰀨 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.
DANGER!
Do not use the appliance as a supporting base for objects.
In particular, do not place receptacles containing liquids (Bottles, Glasses, Jars or Detergents)
on top of the appliance.
If the appliance is installed inside a housing, do not insert or rest other objects inside this housing.

7
General information
ENGLISH
1.6 - TECHNICAL DATA PLATE
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= (Qn)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
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
G = ErP
29=Seasonalspaceheatingenergyefciency
30 =EnergyefciencyinDHWproductionmode
The technical data plate is located
inside the boiler on the back at the
bottom
The CE marking
certies the compliance of the equipment with the
essential safety requirements dened in the directi-
ves and applicable European regulations and that
its functioning satisfy applicable technical stan-
dards.
The CE marking is a󰀩xed to each piece of equip-
ment with an appropriate label.
The CE declaration of conformity issued in accor-
dance with international standards by the manu-
facturer, is placed in documentation envelope sup-
plied with the product.
/

8
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 COR-
ROSIVE WATER WILL NOT BE COVERED BY
THE WARRANTY.
1.7 - WATER TREATMENT
The treatment of the supply water
allows to prevent inconveniences
and maintain the functionality and
e󰀩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)
VALUE MIN MAX
PH 6.5 8
Hardness [°fr] 9 15
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website

9
Technical Features
ENGLISH
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
ON ON < 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.
2ON OFF < 7 °C OFF - Pump ON till T > 10°C
OFF ON OFF - Burner and Pump OFF
OFF OFF OFF - Burner and Pump OFF
(*) Sensor 11 par. 2.2
To activate the antifreeze function only, po-
sition the two knobs as shown in the gure.
The Antifreeze protection is always active.
Even by disabling the heating and domestic hot
water services.
MAX
M
I
N
MAX
MIN
1.8 - BOILER ANTIFREEZE
PROTECTION
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
e󰀨ectively from frost by using antifreeze
products with inhibitor for heating
systems (specic for multidmetal)
Do not use car engine antifreeze
products as they could damage the
water gaskets.
For outdoor installations, in partially protected places, it is necessary to use the additional
resistance kit (optional) for the anti-freeze protection of the DHW and siphon ttings.
Declared room temperature, with use of the resistance kit = -15 ° C.

10
KEY
N°
C.E. S.E. Description
1 db SS Domestic hot water temperature
sensor
2 FLS Flow switch with cold water lter
3 VG Gas valve
4 Fd
E.ACC
/RIL
Ignition/detection electrode
5 Burner
2TECHNICAL FEATURES
AND DIMENSIONS
2.1 - TECHNICAL FEATURES
2.2 -
VIEW WITH THE INDICATION OF THE MAIN COMPONENTS AND DIMENSIONS
KONmC18 - KONmC24
23
27
19
NOTE!
For further details refer to the Technical
Information from the website
8Expansion vessel
10 HL TL Safety thermostat
11 Hb SR Heating temperature sensor
12 Ht P Pump
13 Lp DK Water deciency pressure switch
15 Filling valve

11
Technical Features
ENGLISH
16 Diverter valve
17 Plate heat exchanger
18 FL
FH
VM Fan
19 AF
AS
PV Obstruction Pressure Fan
20 Safety valve
22 rb SRR Return temperature sensor
23 tf TLC Flue gas collector safety thermostat
24 Aluminium Heat Exchanger/Ca-
pacitor
25 Vent valve
26 Condensation drain trap
27 SL Condensate level sensor
C Domestic hot water outlet G ½
G Gas inlet G ¾
KONmC28 / KONmC35
2
3
1
23
22
24
18
25
4
26
15 17
20
12
13
16
8
5
10
11
27
F Cold water inlet G ½
MHeating system ow G ¾
R Heating system return G ¾
Rc Filling valve
Sc Boiler drain
Svs Safety valve drain
Scond Condensation drain
C.E. = ERROR CODES see
par. 4.6
S.E. = WIRING DIAGRAM
KEY see par. 4.5

12
345
®
0
1
2
3
4
bar
MAX
M
I
N
MAX
MIN
bar
service
E
A
D
700
420
125
205
225
125
131
70 61130605643
207
247
CF GRM
Svs
Rc
Scond
Sc
67
KONmC18 - KONmC24
View from above View from below

13
Technical Features
ENGLISH
®
0
1
2
3
4
bar
MAX
M
I
N
MAX
MIN
bar
service
E
A
D
700
420
345
251,5 168,5
142 194
131
70 61130605643
104
137
207
247
CF GRM
Svs
Rc
Scond
Sc
KONmC28 / KONmC35
View from above View from below

14
KONm 18 - 24 = 6m
KONm 28 - 35 = 7m
2.3 - DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR
INSTALLATION
Flow rate (l/h)
Flow rate (l/h)
Avaible Head (m.c.a.) metres of waterAvaible Head (m.c.a.) metres of water
MODULATING PUMP
DIAGRAM OF FLOW RATE/PRESSURE AVAILABLE FOR INSTALLATION

15
Technical Features
ENGLISH
2.4 - OPERATING DATA
KONm R 18 - C 18 R 24 - C24 R 28 - C28 R 35 - C35
Nominal heat input in CH / DHW mode kW 18,0 / 23,4 23,4 / 23,4 28,0 / 28,0 33,0 / 33,0
Minimum heat input with Nat. Gas / Propane kW 3,0 / 4,4 3,0 / 4,4 4,4 / 5,6 4,4 / 5,6
Nominal heat output kW 17,4 22,6 27,2 32,0
Minimum heat output kW 2,9 2,9 4,3 4,3
Nominal output in condensation 50/30 °C kW 18,4 24,0 28,9 33,8
Minimum heat output in condensation 50/30 °C kW 3,2 3,2 4,7 4,7
Combustion e󰀩ciency at full load % 97,6 97,2 97,6 97,2
Combustion e󰀩ciency at part load % 98,6 98,6 98,1 98,1
Heat losses through the casing (min.-max.) % 2,0 - 0,74 2,0 - 0,7 1,47 - 0,43 1,47 - 0,2
(*) Net ue gas temperature tf-ta (max.) °C 49 57,6 48 57
Flue gas mass ow rate (min.-max) g/s 1,3 - 7,9 1,34 - 10,3 2,0 - 12,5 2,0 - 14,7
Air excess λ % 20,6 20,6 23,0 23,0
CO2% 9,5 - 9,5 9,5 - 9,5 9,3 - 9,3 9,3 - 9,3
CO at 0% of O2 (min. - max) ppm 10 - 95 10 - 107 19 - 98 15 - 108
Maximum production of condensate kg/h 2,9 3,7 4,5 5,3
Chimney heat losses with burner ON (min. - max.) %1,4 - 2,4 1,4 - 2,6 1,9 - 2,4 1,9 - 2,8
Chimney heat losses with burner OFF % 0,60 0,46 0,41 0,34
Prevalenza disponibile alla base del camino min. / max.
Pa 2 / 70 2 / 70 2 / 70 2 / 70
Notes: (*) Room Temperature = 20°C Data obtained with appliance operated with Nat Gas (G20)
Fortheadjustmentdata:NOZZLES-PRESSURES-DIAPHRAGMS-FLOWRATES-CONSUMPTIONSrefertotheparagraphADAPTATIONTOOTHERTYPESOFGAS.
2.5 - GENERAL FEATURES
KONmR 18 C 18 R 24 C 24 R 28 C 28 R 35 C35
Appliance category II2H3P II2H3P II2H3P II2H3P
Minimum heat. circuit output (∆t 20 °C) l/min 1,2 1,2 1,7 1,7
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 2,2 2,2 2,8 2,8
Maximum operating temperature in heat. °C 85 85 85 85
Minimum operating temperature in heat. °C 30 30 30 30
Expansion vessel total capacity l 8 8 10 10
Expansion vessel pre-load bar 1 1 1 1
Maximum system capacity (max temp. calc.) l 184 184 184 184
Minimum domestic hot water circuit ow rate l/min. - 2,0 - 2,0 - 2,0 - 2,0
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) ‘‘D’’ l/min. - 11,2 - 11,2 - 13 - 16
Production of D.H.W. in continuous operation with ∆t 45 K
l/min. - 7,34 - 7,34 - 8,6 - 10,1
Production of D.H.W. in continuous operation with ∆t 40 K
l/min. - 8,26 - 8,26 - 9,7 - 11,4
Production of D.H.W. in continuous operation with ∆t 35 K
l/min. - 9,44 - 9,44 - 11,1 - 13,0
Production of D.H.W. in continuous operation with ∆t 30 K
l/min. - 11,0 - 11,0 - 12,9 - 15,2
Production of D.H.W. in continuous operation with ∆t 25 K (*)
l/min. - 13,2 - 13,2 - 15,5 - 18,3
Adjustable DHW temperature °C -
38-60 - 38-60 - 38-60 - 38-60
Voltage/Frequency electric power supply V-Hz 230/50 230/50 230/50 230/50
Fuse on the power supply A (F) 4 4 4 4
Protection rating IP X5D X5D X5D X5D
Net weight kg 32,5 34 32,5 34 35 36,5 35 36,5
Gross weight kg 35,5 37 35,5 37 38 39,5 38 39,5
F Factor - 1 - 1 - 2 - 2
R Factor - - - -
(*) mixed

16
Description Symbol Unit Modello: KONm
R18 C18 R24 C24 R28 C28 R35 C35
Nominal Heat Output Pnominal kW 17 23 27 32
Seasonal space heating energy
e󰀩ciency ƞs% 93 92 93 93
Seasonal e󰀩ciency class in
heating mode AAAA
For CH only and combination boilers: useful heat output
Useful Heat Output in high-tempera-
ture regime
(Tr 60 °C / Tm 80 °C)
P4kW 10,3 12,7 15,8 18,2
Useful e󰀩ciency at nom. heat output
in high-temperature regime
(Tr 60 °C / Tm 80 °C
ƞ4% 88,1 87,0 88,4 87,5
Useful heat output at 30% of nom.
heat output in low-temperature
regime (Tr 30 °C)
P1kW 3,4 4,2 5,3 6,1
Useful e󰀩ciency at 30% of nom. heat
output in low-temperature regime
(Tr 30 °C)
ƞ1% 97,8 96,7 97,5 97,5
Range-rated boiler: YES / NO SI SI SI SI
Auxiliary electricity consumption
At full load elmax kW 0,085 0,085 0,116 0,116
At part load elmin kW 0,012 0,012 0,012 0,012
In stand-by mode PSB kW 0,003 0,003 0,003 0,003
Other items
Heat loss in stand-by Pstb kW 0,0824 0,0824 0,1136 0,1136
Emissions of nitrogen oxides ref. PCS NOx mg/kWh 33 45 50 39
NOx Class 6 6 6 6
Annual electricity consumption QHE GJ 32 40 49 56
Inside sound power level Lwa dB (A) 50,7 51 55,2 55,2
For CH & DHW production boilers
Declared load prole - XL - XL - XL - XL
Energy e󰀩ciency in DHW production mode ƞwh % -86-86-85-85
Daily electricity consumption Qelec kWh - 0,09 - 0,09 - 0,09 - 0,09
Daily fuel consumptionl Qfuel kWh - 22,07 - 22,07 - 23,05 -
23,13
Annual electricity consumption AEC kWh 400 400 402 402
Annual fuel consumption AFC GJ 17 17 17 18
Seasonal e󰀩ciency class
in DHW production mode - A - A - A - A
2.6 - DATA ACCORDING TO ErP DIRECTIVE

17
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 oper-
ate 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
bottlenecks, and that no exhausts
from other appliances are inserted,
unless the ue has been implement-
ed to accommodate several utilities
according to specic standards and
regulations in force. Only after this
check can the fitting 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
e󰀩ciency and output.
The boiler can be installed outside in
a partially protected place or in any
case in a place where the boiler is not
exposed to the direct action of atmos-
pheric agents.
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 o󰀩cial journal, as well as the applicable
technical standards.
3.3 - PREVENTIVE VERIFICATION
AND VERIFICATION AND AD-
JUSTMENT OPERATIONS
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler page of the
www.unicalag.it website
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler page of
the www.unicalag.it website
NOTE!
For further details relating to the standards, rules
and regulations for safe installation of the thermal
unit, refer to the section "Technical Information"
on the boiler page of the www.unicalag.it website

18
The 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.
Unical AG S.p.A. 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
- Warranty
- 2 Spare parts form
- Certicate of conformity
B - Connection predisposition paper template
C - Chimney spacer
21
3.4 - PACKAGING
P
depth
L
width
H
height
380 mm 470 mm 810 mm
• The boilers must always be lifted and
carried by two people, or a carrier
carriage or special transport equip-
ment must be used.
OBLIGATION!
wear protective gloves

19
ENGLISH
Installation Instructions
(200) (200)
3.5 - POSITIONING THE BOILER
Clearance
105
125
200
105
125
200
KONm18 - 24 KONm28 - 35
When choosing the place of the installation of the
appliance, follow the safety instructions below:
- Place the appliance 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.
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.

20
3.6 - LUE GAS EXHAUST PIPE CONNECTION
FOR BOILERS WITH FORCED DRAUGHT )
C13x C13
% Slope towards inlet = 3%
LT** ( TOTAL LENGTH or LA intake + L Exhaust)
COAXIAL Ø60/100 DOUBLE Ø80
FROM [m] TO [m] FROM [m] TO [m]
1 5,5 1 + 1 40
(20A+20S)
COAXIAL Ø80/125 DOUBLE Ø60
FROM [m] TO [m] FROM [m] TO [m]
1 8 1 + 1 20
(10A+10S)
Distance between air
inlet pipe and ue gas
exhaust pipe: min 250
mm - max 500
Horizontal exhaust and intake terminals directed
outside via coaxial or double pipes..
LT
%
Calculation to determine the lengths
of the exhaust congurations
CAUTION
LT** total length is a reference value
for the dimensioning of the ducts of
A(intake) and S(Exhaust).
Subtracting the values of LT repor-
ted, at values of bends* / terminals*
/ extensions* you get the value:
if > 0 = OK
POSSIBLE conguration
if < 0 = NO
WRONG conguration
Please note: these values relate to
exhausts/made by means of rigid
pipes and smooth original UNICAL.
C33x C33
LT** ( TOTAL LENGTH or LA intake + L Exhaust)
COAXIAL Ø60/100 DOUBLE Ø80
FROM [m] TO [m] FROM [m] TO [m]
1 7 0,5 + 0,5 40
(20A+20S)
COAXIAL Ø80/125 DOUBLE Ø60
FROM [m] TO [m] FROM [m] TO [m]
1 9 1 + 1 20
(10A+10S)
Vertical exhaust and intake terminals directed
outside via coaxial or double pipes.
To connect the ue gas exhaust pipe, local and na-
tional standards must be observed
In the event the boiler is replaced, ALWAYS re-
place the ue gas pipe as well.
The boiler is type approved for the exhaust congu-
rations listed below:
ATTENTION
[m] = equivalent meters
(*) Values in the MT018 available on the website (technical info section)
(*) Values in the MT018 available on the website.