Unical ALKON 35S C Operation instructions

00333170 - 2nd edition - 09/2012

USER’S OPERATING

INSTRUCTIONS

English

ALKON

35S R - 35S C

(Adjusted for 28 kW)

35S R - 35S C

35S R

(Adjusted for 25 kW)

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 temperatu-

re 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

3 Water 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 ................................................................................................................................................................ 6

Energizing the “pre-heat” function .................................................................................................................................... 6

CH Mode ............................................................................................................................................................................ 6

Shutting down the boiler .................................................................................................................................................... 7

6.4 Frost protection mode ........................................................................................................................................................ 7

6.5 Eliminating the faults .......................................................................................................................................................... 7

General 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.

4 - INFORMATION TO BE HANDED OVER TO THE USER (BY THE INSTALLER)

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

appliance could cause injury to persons, animals or damage to property. The manufacturer shall not be

held liable for any such injury and/or damage.

DANGER!

NEVER try to service or repair the appliance yourself.

All types of servicing or repairs must be carried out by a professionally qualified person, authorized by

UNICAL; 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 feed pipes and electrical current

-to the flue pipe, safety relief valve and its drainage pipe

-to the constructive components which influence the appliance’s safe operation

Smell of gas

If you smell gas follow these safety indications:

-Do not touch any electrical switches

-Do no smoke

-Do not use the telephone

-Close the On/Off gas service cock

-Open all windows and doors where the gas leakage has occurred

-Inform the gas society or a specialized company

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.

User’s operating instructions

6 - OPERATING INSTRUCTIONS

6.1 - CONTROL PANEL

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

E = Burner On indicator led(Green)

F = “RIRA” (pre-heating) mode indicator led

G = Reset /chimneysweeper mode key

H = Lock-out led indicator

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 mi-

nimum and 80°C maximum.



















Domestic hot water temperature control

NOTE!

For the Alkon R model this mode is enabled

only if the boiler is connected to an external

storage tank.

With this knob it is possible to adjust the do-

mestic hot water draw-off temperature:

By turning the knob within the range indi-

cated in the figure, it is possible to adjust

the domestic hot water temperature. The

temperature can be adjusted between

35°C minimum and 57°C maximum.

User’s operating instructions

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 “Chimneyswee-

per” mode is activated. This means that

the boiler will be forced to operate at the

maximum (or minimum) output so as to

permit the adjustment operations and the

combustion analysis.

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).

The “chimneysweeper” mode will remain enabled for 15 minu-

tes.

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 indicated.

-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 cor-

rect 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 cen-

tral 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

functioning correctly, both in central heating request

mode and in domestic hot water production mode.

“RIRA” pre-heating function

If this function is enabled it will ensure an

immediate supply of domestic hot water.

- This function is enabled if the led (green)

is illuminated.

- This function is disenabled if the led (gre-

en) is switched off.

To enable/disenable the RIRA function

press the appropriate key.

Lock-out indicator led

When this led is illuminated it indicates that the burner’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 boi-

ler (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

nearest Unical authorized After Sales Servi-

ce Centre.

User’s operating instructions

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).

6.3 - BOILER OPERATION

SHUTTING DOWN THE BOILER

To disenable the CH mode

Turn the knob (B) completely to the left to

disenable the CH mode. The DHW mode

however remains enabled (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

On/Off gas cock into the Off position and, if fitted, turn the cold

water supply cock into the Off position.

6.4 - FROST PROTECTION MODE

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 ener-

gized 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 temperatu-

re 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.

Domestic hot water production

Position the domestic hot water control knob

(A) to the desired DHW temperature:

-with the knob turned completely to the left

= MIN

-with the knob turned completely to the ri-

ght = MAX

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 significant re-

duction of lime scale formation.

When a tap or shower is turned on the appliance will provide

domestic hot water at the desired temperature

Enabling and disenabling the “RIRA” pre-heating function

(only on the Alkon35S C model)

This function can be enabled/disenabled by

pressing this key.

Green led On > RIRA function enabled

Green led Off > RIRA function disenabled.

If this function is enabled it will guarantee an immediate sup-

ply of domestic hot water.

Central heating mode

The boiler will operate in the CH mode

when the knob (B) is positioned within

the range indicated in the figure.

-with the knob in the position 1, the mi-

nimum temperature corresponds to

30°.

- with the knob in the position 2, the

maximum temperature corresponds to

80°C.

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

illuminated do not try to reset the boiler your-

self. Contact your nearest Unical authorized

Afters Sales Service Centre.

Burner lock-out led constantly illuminated

Open

Filling

cock

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.

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.

AG S.P.A.

46033 casteldario - mantova - italia - tel. +39 0376 57001 (r.a.) - fax +39 0376 660556

www.unical.ag - [email protected]

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