Unical ALKON 24 B 60 Datasheet

00332925 - 2nd edition - 02/09
ALKON 24 B 60
ALKON 35 B 60
INSTALLATIONAND
SERVICING MANUAL

Warning: this manual contains instructions to be used exclusively by the installer and/or a
competent person in accordance with the current laws in force.
The end user MUST not make any alterations to the boiler.
Failure to follow the instructions indicated in this manual, which is supplied with the boiler,
could cause injury to persons, animals or damage to property. UNICAL shall not be held
liable for any injury and/or damage.
CONTENTS
1GENERALINFORMATION ................................................................................................................................................................................... 3
1.1 Symbols used in this manual ....................................................................................................................................................................... 3
1.2 Correct use of the appliance ....................................................................................................................................................................... 3
1.3 Water treatment ............................................................................................................................................................................................ 3
1.4 Information to be handed over to the user .................................................................................................................................................. 3
1.5 Safety warnings ............................................................................................................................................................................................ 4
1.6 Data badge .................................................................................................................................................................................................... 5
1.7 General warnings ......................................................................................................................................................................................... 6
2TECHNICAL FEATURESAND DIMENSIONS ..................................................................................................................................................... 7
2.1 Technical features ........................................................................................................................................................................................ 7
2.2 Dimensions ................................................................................................................................................................................................... 8
2.3 Main components ......................................................................................................................................................................................... 9
2.4 Boiler water circuit ...................................................................................................................................................................................... 10
2.5 Performance data according to the Standard UNI 10348 ....................................................................................................................... 11
2.6 General features ......................................................................................................................................................................................... 12
3INSTRUCTIONS FOR THE INSTALLER ............................................................................................................................................................ 12
3.1 General warnings ...................................................................................................................................................................................... 12
3.2 Standard codes for installation ................................................................................................................................................................. 13
3.3 Packaging .................................................................................................................................................................................................. 13
3.4 Boiler location ............................................................................................................................................................................................ 14
3.5 Boiler installation ........................................................................................................................................................................................ 15
3.6 Gas connection ......................................................................................................................................................................................... 15
3.7 Central heating connections ..................................................................................................................................................................... 16
3.8 DHW connections ..................................................................................................................................................................................... 17
3.9 Condensate drain ...................................................................................................................................................................................... 18
3.10 Flue outlet installation................................................................................................................................................................................ 19
3.11 Electrical connections ............................................................................................................................................................................... 26
General warnings ...................................................................................................................................................................................... 26
Connection to mains supply 230V ............................................................................................................................................................ 26
Outdoor sensor connection ..................................................................................................................................................................... 27
ON-OFF digital room controller connection ............................................................................................................................................ 28
Modulating RT/OT room controller connection ....................................................................................................................................... 28
Layout of the electrical connection for zone control systems ............................................................................................................... 29
3.12 Wiring diagrams ........................................................................................................................................................................................ 30
3.13 Filling the system .............................................................................................................................................................................. 31
3.14 Initial lighting .............................................................................................................................................................................................. 32
3.15 Burner pressure adjustment .................................................................................................................................................................... 33
3.16 Variation of output range ........................................................................................................................................................................... 36
4SERVICINGSCHEDULE .................................................................................................................................................................................... 37
Instructions for inspecting and servicing the appliance .................................................................................................................................. 37
5FAULT CODES ................................................................................................................................................................................................... 38
5.1 Fault codes ................................................................................................................................................................................................ 38
6CE CERTIFICATE ............................................................................................................................................................................................... 40

3
General information
1.1 - SYMBOLS USED IN THIS MANUAL
When reading this manual particular care has to be given to the parts marked with the followings symbols:
NOTE!
Suggestions for the user
WARNING!
Indicates a potentially dangerous situation
for the product and the environment
DANGER!
Indicates serious danger for your
personal safety and for your life
1.2 - A CORRECT USE OF THE APPLIANCE
The ALKON PLUS appliance has been designed utilizing today’s heating technology and in compliance with
the current safety regulations.
However, following an improper use, dangers could arise for the safety and life of the user or of other
people, or damage could be caused to the appliance or other objects.
The appliance is designed to be used in pumped hot water central heating systems and for the production
of domestic hot water.
Any other use of this appliance will be considered improper.
UNICAL declines any responsibility for any damages or injuries caused by an improper use; in this case the
risk is completely at the user’s responsibility.
In order to use the appliance according to the foreseen scopes it is necessary to carefully follow the
instructions indicated in this manual.
• The hardness of the mains water supply conditions the frequency with which the DHW heat exchanger is
cleaned.
• In hard water areas where the main water can exceed 15°f total hardness, a scale reducing device is
recommended. The choice of this device has to be made taking into consideration the water’s characteristics.
• In order to improve the resistance to lime scale it is recommended to adjust the domestic hot water tempera-
ture as near as possible to the one you really require.
• We recommend you to check the state of cleanliness of the domestic hot water heat exchanger at the end of
the first year and subsequently, on the basis of the lime scale found, this period can be extended to two years.
1.4 - INFORMATION TO BE HANDED OVER TO THE USER
1GENERAL INFORMATION
The user has to be instructed on the use and operation of his heating system, in particular:
• Hand over these instructions to the end user, together with any other literature regarding this appliance placed
inside the envelope contained in the packaging. The user has to keep these documents in a safe place in
order to always have them at hand for future reference.
• Inform the user on the importance of air vents and of the flue outlet system, stressing the fact that is absolutely
forbidden to make any alterations to the boiler.
• Inform the user how to check the system’s water pressure as well as informing him how to restore the correct
pressure.
• Explain the function of time and temperature controls, thermostats, heating controls and radiators, to ensure
the greatest possible fuel economy.
• Remind the user that, in order to comply to the standards in force, it is necessary to inspect and service the
boiler according to the current codes of practice and according to the schedule indicated in this manual by the
manufacturer.
• If the appliance is sold or transferred to another owner or if the present user moves home and leaves the
appliance installed, ensure yourself that the manual always follows the appliance so that it can be consulted
by the new owner and/or installer.
Failure to follow the instructions indicated in this guide, which is supplied with the boiler, could cause injury
to persons, animals or damage to property. The manufacturer shall not be held liable for any such injury and/
or damage.
1.3 - WATER TREATMENT

4
General information
1.5 - SAFETY WARNINGS
WARNING!
The installation, adjustment, and servicing of this appliance must be carried out by a competent person and
installed in accordance with the current standards and regulations. Failure to correctly install this applian-
ce could cause injury to persons, animals or damage to property. The manufacturer shall not be held liable
for any injury and/or damage.
DANGER!
Servicing or repairs of the appliance must be carried out by competent qualified service technicians;
UNICAL recommends drawing up a service contract. Bad or irregular servicing could compromise the
safe operation of the appliance, and could cause injury to persons, animals or damage to property for
which UNICAL shall not be held liable.
Alterations to parts connected to the appliance
Do not carry out any alterations to the following parts:
- the boiler
- to the gas, air, water supply pipes and electrical supply
- to the flue pipe, safety relief valve and its drainage pipe
- to the constructive components which influence the appliance’s safe operation
WARNING!
When tightening or loosening the screw pipe connections, use only adequate fork spanners.
The improper use and/or the use of inadequate equipment can cause damages (for example water or gas
leakages).
WARNING!
Indications for appliances operating with propane gas
Ensure yourself that before installing the appliance the gas tank has been purged.
For a correct purging of the tank contact the liquid gas supplier or a competent person who has been legally
authorized.
If the tank has not been purged correctly problems could occur during ignition.
If this occurs contact the liquid gas tank’s supplier.
Smell of gas
If you smell gas follow these safety indications:
- Do not turn on or off electrical switches
- Do not smoke
- Do not use the telephone
- Close the mains gas tap
- Open all windows and doors where the gas leakage has occurred
- Contact the gas society or a company specialized in installing and servicing heating systems
Explosive and easily inflammable substances
Do not use or leave explosive or easily inflammable material (as for example: petrol, paint, paper) in the room
where the appliance has been installed.

5
General information
LEGEND:
1 = YearofCEcertification issue
2=Boiler type
3=Boiler model
4=Number of stars (Directive 92/42/CEE)
5=(S.N°) Serial number
6=P.I.N. code
7=Approved fluing configurations
8=(N0x) N0x class
A = Central Heating circuit features
9=(Pn) Nominal output
10 = (Pcond) Condensing nominal output
11 = (Qmax) Nominal heat input
12 = (Adjusted Qn)Adjusted for nominal Heat input
13 = (PMS) Max. pressure C.H. system
14 = (T max) Max. C.H. temperature
B = Domestic Hot Water circuit features
15 = (Qnw) Nominal heat input in D.H.W. mode (if different from Qn)
16 = (D) Specific D.H.W. flow rate according to EN 625 - EN 13203-1
17 = (R factor) N° taps based on the quantity of water declared EN
13203-1
18 = (F factor) N°stars based on the quality of water declared
EN 13203-1
19 = (PMW) Max. pressure D.H.W. system
20 = (T max) Max. temperature D.H.W system
C = Electrical features
21 = Electrical power supply
22 = Consumption
23 = Protection grade
D = Countries of destination
24 = Direct and indirect country of destination
25 = Gasfamily
26 = Supply pressure
E = Factory setting
27 = Adjusted for gas type X
28 = Space for national brands
1.6 DATA BADGE
CEMarking
- TheCEmarkingdocumentsthattheboilerssatisfy:
- TheessentialrequirementsoftheDirectiveregardinggasappliances(Directive
90/396/CEE)
- TheessentialrequirementsoftheDirectiveregardingelectromagneticcompatibility
(Directive89/336/CEE)
- TheessentialrequirementsoftheEfficiencyDirective(Directive92/42/CEE)
- TheessentialrequirementsofthelowvoltageDirective(Directive73/23/CEE)
®
1
2
3
5
7 8
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4
9
11
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12
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15
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19
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28
A
B
21 22
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24 25 26
27
C D
E