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
1
GENERAL INFORMATION .................................................................................................................................................................................
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
2
TECHNICAL FEATURES AND DIMENSIONS ...................................................................................................................................................
7
2.1
Technical features .........................................................................................................................................................................................
7
2.2
Dimensions ....................................................................................................................................................................................................
7
2.3
Main components ..........................................................................................................................................................................................
8
2.4
Boiler water circuit .........................................................................................................................................................................................
9
2.5
Performance data according to the Standard UNI 10348 .........................................................................................................................
10
2.6
General features ..........................................................................................................................................................................................
10
3
INSTRUCTIONS FOR THE INSTALLER ..........................................................................................................................................................
11
3.1
General warnings .......................................................................................................................................................................................
11
3.2
Standard codes for installation ..................................................................................................................................................................
12
3.3
Packaging ...................................................................................................................................................................................................
12
3.4
Boiler location ............................................................................................................................................................................................
13
Dimensions for connecting the Alkon 28 to the external storage tank kit DSP120 ................................................................................
14
3.5
Boiler installation .......................................................................................................................................................................................
16
3.6
Gas connection ..........................................................................................................................................................................................
16
3.7
Central heating connections ......................................................................................................................................................................
17
3.8
DHW connections ......................................................................................................................................................................................
19
3.9
Examples of system pipework connections .............................................................................................................................................
20
3.10
Condensate drain .......................................................................................................................................................................................
21
3.11
Flue outlet installation ................................................................................................................................................................................
22
3.12
Electrical connections ...............................................................................................................................................................................
22
General warnings ......................................................................................................................................................................................
28
Connection to mains supply 230V ............................................................................................................................................................
28
Access to the terminal block and external connections ........................................................................................................................
28
Outdoor sensor connection .....................................................................................................................................................................
29
ON-OFF digital room controller connection ............................................................................................................................................
30
Modulating RT/OT room controller connection .......................................................................................................................................
30
Layout of the electrical connection for zone control systems
............................................................................................................... 31
3.13
Wiring diagrams ........................................................................................................................................................................................
32
Functional flow wiring diagram for Alkon 24/28/35 C ..............................................................................................................................
32
Functional flow wiring diagram for Alkon 18/24/28/35 R ........................................................................................................................
33
Jumper installation on the modulating board ...........................................................................................................................................
34
3.14
Filling the system ......................................................................................................................................................................................
35
3.15
Initial lighting ..............................................................................................................................................................................................
36
3.16
Burner pressure adjustment ....................................................................................................................................................................
37
3.17 Variation of output range ........................................................................................................................................................................... 40
4
SERVICING SCHEDULE ....................................................................................................................................................................................
42
Instructions for inspecting and servicing the appliance ..................................................................................................................................
42
5
FAULT CODES ...................................................................................................................................................................................................
45
6
CE CERTIFICATE ...............................................................................................................................................................................................
47
Summary of Contents for ALKON R 24
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