Unical ALKON 24 B 60 Operation instructions

00332926 - 1st edition - 09/2008
ALKON 24 B 60
ALKON 35 B 60
USER’SOPERATING
INSTRUCTIONS

2
Contents
1 - SYMBOLS USED IN THIS GUIDE
When reading this guide 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
2 - CORRECT USE OF THE APPLIANCE
The ALKON 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 domestic hot
water production.
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 scopes it was designed for it is essential to carefully follow
the instructions indicated in this guide.
3 - WATER TREATMENT
• The hardness of the mains water supply conditions the frequency with which the heat exchanger is cleaned.
• In hard water areas where the main water can exceed 15°f total hardness, a scale reducing device is recom-
mended. 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.
• The use of a modulating room thermostat reduces the dangers of lime scale formation.
• 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 amount of lime scale found, this period can be extended to two
years.
CONTENTS
1Symbols used in this guide ....................................................................................................................................................... 2
2Correct use of the appliance .................................................................................................................................................... 2
3Water treatment ......................................................................................................................................................................... 2
4Information to be handed over to the user ............................................................................................................................... 3
5Safety warnings ......................................................................................................................................................................... 3
6Operating instructions ............................................................................................................................................................... 4
6.1 Control panel ...................................................................................................................................................................... 4
6.2 Check list before commissioning the boiler ...................................................................................................................... 6
6.3 Boiler operation .................................................................................................................................................................. 6
DHW production (“R” model combined with an external storage tank) ......................................................................... 6
DHW production (“C” version) ........................................................................................................................................... 6
Energizing the “pre-heat” function .................................................................................................................................... 6
CH Mode ............................................................................................................................................................................ 6
Shutting down the boiler .................................................................................................................................................... 6
6.4 Frost protection mode ........................................................................................................................................................ 6
6.5 Eliminating the faults .......................................................................................................................................................... 7

3
General information
L'utente deve essere istruito sull'utilizzo e sul funzionamento del proprio impianto di riscaldamento; in parti-
colare:
• Consegnare all'utente le presenti istruzioni, nonché gli altri documenti relativi all'apparecchio inseriti nella
busta contenuta nell'imballo. L’utente deve custodire tale documentazione in modo da poterla avere a
disposizione per ogni ulteriore consultazione.
• Informare l'utente sull'importanza delle bocchette di areazione e del sistema di scarico fumi, evidenziandone
l'indispensabilità e l'assoluto divieto di modifica.
• Informare l'utente riguardo al controllo della pressione dell'acqua dell'impianto nonché sulle operazioni per il
ripristino della stessa.
• Informare l'utente riguardo la regolazione corretta di temperature, centraline/termostati e radiatori per rispar-
miare energia.
• Ricordare che, nel rispetto delle norme vigenti, il controllo e la manutenzione dell’apparecchio devono essere
eseguiti conformemente alle prescrizioni e con le periodicità indicate dal fabbricante.
L’installazione e la manutenzione devono essere effettuate in ottemperanza alle norme vigenti secondo le
istruzioni del costruttore e da personale qualificato ed abilitato ai sensi di legge. Gli impianti per la produzione
di acqua calda ad uso sanitario DEVONO essere costruiti nella loro interezza con materiali conformi al
D.M. 174/2004 ( rubinetterie, tubazioni, raccordi ecc...).
Per personale professionalmente qualificato s'intende quello avente specifica competenza tecnica nel
settore dei componenti di impianti di riscaldamento ad uso civile, produzione di acqua calda ad uso
sanitario e manutenzione. Il personale dovrà avere le abilitazioni previste dalla legge vigente.
• Se l'apparecchio dovesse essere venduto o trasferito ad un altro proprietario o se si dovesse traslocare e
lasciare l'apparecchio, assicurarsi sempre che il libretto accompagni l'apparecchio in modo che possa essere
consultato dal nuovo proprietario e/o dall'installatore.
Nel caso di danni a persone, animali e cose derivanti dalla mancata osservanza delle istruzioni contenute nel
presente manuale il costruttore non può essere considerato responsabile.
4 - INFORMAZIONI DA FORNIRE ALL’UTENTE (A CURA DELL’INSTALLATORE)
5 - AVVERTENZE PER LA SICUREZZA
ATTENZIONE!
L’installazione, la regolazione e la manutenzione dell’apparecchio deve essere eseguita da un personale
professionalmente qualificato, in conformità alle norme e disposizioni vigenti, poichè un'errata installazio-
ne può causare danni a persone, animali e cose, nei confronti dei quali il costruttore non può essere
considerato responsabile.
PERICOLO!
Non tentare MAI di eseguire lavori di manutenzione o riparazioni della caldaia di propria iniziativa.
Qualsiasi intervento deve essere eseguito da personale professionalmente qualificato, autorizzato da
Unical; si raccomanda la stipula di un contratto di manutenzione.
Una manutenzione carente o irregolare può compromettere la sicurezza operativa dell’apparecchio e
provocare danni a persone, animali e cose per i quali il costruttore non può essere considerato responsa-
bile.
Modifiche alle parti collegate all'apparecchio
Non effettuare modifiche ai seguenti elementi:
- alla caldaia
- alle linee di alimentazione gas, aria, acqua e corrente elettrica
- al condotto fumi, alla valvola di sicurezza e alla sua tubazione di scarico
- agli elementi costruttivi che influiscono sulla sicurezza operativa dell'apparecchio
Odore di gas
Qualora venisse avvertito odore di gas attenersi alle seguenti indicazioni di sicurezza:
- non azionare interruttori elettrici
- non fumare
- non far uso del telefono
- chiudere il rubinetto d'intercettazione del gas
- aerare l'ambiente dove è avvenuta la fuga di gas
- informare la società di erogazione gas oppure una ditta specializzata.
Sostanze esplosive e facilmente infiammabili
Non utilizzare o depositare materiali esplosivi o facilmente infiammabili (ad es. benzina, vernici, carta) nel
locale dove è installato l'apparecchio.

4
User’s operating instructions
Domestic hot water temperature control
Through this knob it is possible to allow
thepreparationofthestoragetankandto
adjustthetemperatureofthedomestichot
water:
Withthepointeroftheknob positioned
in the range shown beside it is
possible to adjust the temperature of
the domestic hot water. The
adjustment range is between a
minimum of 25°C and a maximum of
60°C.
If the rotating switch is in the position , the D.H.W.
circuit is not in operation (in this case no warm water is
available).
If, in the mean time, the rotating switch (A) is in the
position , the antifreeze function of the storage tank is
activated.
F button
ATTENTION!
Functionnot active forboilerswith domestic
hot water production by storage tank.
MAX
MAX
6 - OPERATING INSTRUCTIONS
6.1 - CONTROL PANEL
E = Burner On indicator led (Green)
F = Not active
G = Reset /chimneysweeper mode key
H = Lock-out led indicator (Red)
I = System temperature control/pressure gauge
Summer/winter selector + Central heating
temperature control knob
By turning this knob it is possible to choose
the following operating modes:
- Summer (only DHW production)
- Winter (DHW production and central hea-
ting temperature control)
When the switch is in the (Summer)
position the central heating mode is exclu-
ded. However, the frost protection mode
remains enabled.
With the knob in the position indicated
in the figure, the boiler is in the “Winter”
mode, and controls the central heating
hot water flow temperature. The tempe-
rature can be adjusted between 30°C
minimum and 80°C maximum.
A = Domestic hot water temperature control
B = Summer/winter selector + Central heating temperature
control knob
C = Power On indicator led (Green)
D = Central heating mode indicator led
MAX
M
I
N
SERVICE:
MAX
B
C
A
DE HGI
F

5
User’s operating instructions
By pressing this key for at least 3 seconds
the boiler will operate at the maximum ou-
tput (led D= illuminated and flashing and
led E= constantly illuminated).
By briefly pressing this key again (<3 secs.),
the boiler will operate at the minimum ou-
tput (both the leds Dand Eflashing).
By briefly pressing this key again (<3 secs.),
the boiler will operate at the minimum ou-
tput (both the leds Dand Eflashing).
The “chimneysweeper” mode will remain enabled for 15 mi-
nutes.
To disenable the “CHIMNEYSWEEPER” mode before this set
time has elapsed, press the reset/chimneysweeper key “G”
for at least 3 seconds.
System temperature control/pressure gauge
This displays:
- on the upper scale the central heating
hot water flow temperature is indica-
ted.
- On the lower scale the water pressure
in the central heating system is indica-
ted.
- If the pressure is lower then 0,7 bar,
then it will be necessary to restore the
correct pressure by operating the filling
valve when the system is cold and the
boiler not operating
Power On indicator led
This led will illuminate when the boiler is connected to
the electricity supply
Central heating mode indicator led
This led will illuminate when there is a request for
central heating. If simultaneously there is a request
for domestic hot water production, the led will switch
off.
Burner On indicator led
When this led is illuminated it indicates that the burner is fun-
ctioning correctly, both in central heating request mode and in
domestic hot water production mode.
Lock-out indicator led
When this led is illuminated it indicates that the bur-
ner’s safety cut-off device has shut-down the boiler.
Reset key
The function of this key is to reset correct boiler ope-
ration after the cut-off device has shutdown the boiler
(red led indicator illuminated)
If the cut-off device operates more than 3
times, causing boiler shutdown, do not try to
reset the boiler yourself. Contact your nea-
rest Unical authorized After Sales Service
Centre.
Reset key with “Chimneysweeper” mode
WARNING!
This operation can be carried out exclusi-
vely by personnel from authorized After Sa-
les Service centres. The user is NOT autho-
rized to activate the following described
mode.
By pressing this key the “Chimneysweeper”
mode is activated. This means that the boiler
will be forced to operate at the maximum (or
minimum) output so as to permit the adjust-
ment operations and the combustion analysis.
6.2 - CHECK LIST BEFORE COMMISSIONING
THE BOILER
Before commissioning the appliance it is recommended to
check the following points:
- Check that the On-Off gas valve, positioned upstream of
the boiler, is in the On position..
- Check that any On-Off valves fitted on the flow and return
pipes for servicing purposes are in the On position.
- Check that any On-Off valves fitted on the cold water inlet
for servicing purposes are in the On position.
- Check that the pressure relief valve drainage pipe is con-
nected to the sewage system.
- Check that the boiler is connected to the electrical supply;
the green indicator led ( ) on the control panel must be
illuminated..
- Check the heating system pressure, indicated by the pres-
sure gauge. For correct operation the pressure should be
between 0,8 and 1 bar (with the pump not running).
If the pressure falls below 0,7 bar restore the correct pres-
sure by regulating the filling valve when the system is cold
and the boiler not operating (refer to paragraph 6.5).

6
User’s operating instructions
6.3 - BOILER OPERATION
Position the domestic hot water control
knob (A) to the desired DHW tempera-
tur
- with the knob turned at 10% to the left
= 25°C
- with the knob turned completely to the
right = 60°C
Note:
By adjusting the DHW temperature at a tem-
perature very close to the one actually used
will avoid mixing hot water with cold water,
thus resulting in fuel savings and a signifi-
cant reduction in lime scale formation.
In this case, the boiler will fire until the water contained in the
tank has reached the desired temperature, set via the knob
“A” .
When a tap or shower is turned on the appliance will provide
domestic hot water at the desired temperature.
Domestic hot water production
For the operation in heating mode the
knob (B) must be positioned in the range
as shown in figure.
- the knob pointer in position 1
corresponds to the minimum
temperature of 35°C
- the knob pointer in position 1
corresponds to the maximum
temperature of 80°C
SWITCH OFF OF THE BOILER
Deactivation of heating mode
By rotating the knob (B) completely to
the left the heating is deactivated, but
the D.H.W. mode remains active
(Summer mode).
Complete boiler shut down
If the boiler is completely shut down, the CH and DHW mode
will be completely disenabled.
To completely shut down the boiler, switch off the electrical
supply to the boiler (the green “Power On” led is not illumi-
nated).
If the boiler will remain shut down for a longer period, turn the
Domestic hot water production
MAX
On/Off gas cock into the Off position and, if fitted, turn the cold
water supply cock into the Off position.
In the case of long periods of inactivity of the boiler close
the gas and water gate valves. Remember that the installation
of this boiler, as well its maintenance, must be performed by
authorised and trained personnel. All these activities have to
be recorded on the log book of the installation, as per local
regulations.
6.4 - ELIMINATING THE FAULTS
The boiler is fitted with a frost protection system which will
operate automatically when the system temperature falls be-
low 6°C: the burner is automatically fired and the pump is
energized until the system’s water temperature has risen to
16°C.
If the temperature detected by the CH sensor falls below 2°C,
burner operation is automatically stopped until the tempera-
ture has risen to 5°C.
WARNING!
This feature will operate only if the electrical
supply to the boiler is On (green Power On led
illuminated).
However, further frost protection can be incor-
porated by using specific frost protection pro-
ducts, suitable for multi-metal systems. Do not
use anti-frost products for motor vehicles
because they could seriously damage the
water gaskets.
If, for any reason, there is no gas or electrical
supply, the above described frost protection
mode will not be active.
MAX
M
I
N
MAX

7
User’s operating instructions
Cause:
Insufficient water pressure in the central heating system.
Elimination of the fault:
Restore the correct pressure value by regulating the boiler’s
filling valve (for correct boiler operation the pressure should
be between 0,8 and 1 bar).
When the correct pressure value has been reached the led
will switch off automatically and normal boiler operation will
be restored.
DANGER!
If the system has to be frequently restored
please contact an authorized Unical After
Sales Service Centre.
6.5 - ELIMINATING THE FAULTS
If the boiler goes into lock-out the user can reset the boiler
only in the following cases:
Lock-out led illuminated and flashing
WARNING:
If the boiler goes into lock-out and/or the leds
continue to flash repeatedly or remain illumi-
nated do not try to reset the boiler yourself.
Contact your nearest Unical authorized Af-
ters Sales Service Centre.
Burner lock-out led constantly illuminated
Cause:
IThe burner’s lock-out device has intervened due to:
- no gas supply (in this case check that the gas service cock
is open
- presence of air in the piping (if it is a new system or after a
long inactivity of the boiler).
Elimination of the fault:
Check that the gas service cock is in the On position and that
the air present in the piping has been vented.
Press the reset key to restore correct boiler operation.
If the cut-off device operates repeatedly (a
maximum of 3 times), causing boiler shu-
tdown, do not try to relight the boiler your-
self. Contact your nearest Unical authorized
After Sales Service Centre.
Filling cock

AG S.P.A.
46033 casteldario - mantova - italia - tel. [phone] (r.a.) - fax [phone]
www.unical.ag - [email protected]
The Unical declines every responsibility for the possible inaccuracies if owed to errors of transcript or press. Also
reserves the right to bring those changes that it will hold necessary to it own products or profits, without jeopardizing its
essential characteristics.