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
1
Symbols used in this guide .......................................................................................................................................................
2
2
Correct use of the appliance ....................................................................................................................................................
2
3
Water treatment .........................................................................................................................................................................
2
4
Information to be handed over to the user ...............................................................................................................................
3
5
Safety warnings .........................................................................................................................................................................
3
6
Operating 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
