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Other failures ....................................................................................................................................... 36
14.2.
HANDING THE BOILER OVER TO THE CUSTOMER ............................................................. 37
15.
TECHNICAL SERVICE AND OPERATION CHECK ................................................................. 37
16.
Technical service .................................................................................................................................. 37
16.1.
Cleaning the combuction unit ........................................................................................................ 37
16.1.1.
External cleaning of heat exchanger.............................................................................................. 38
16.1.2.
Internal cleaning (washing) of heat exchanger ............................................................................. 38
16.1.3.
Internal cleaning (washing) of secondary heat exchanger .......................................................... 38
16.1.4.
16.2. Boiler's operation check...................................................................................................................... 38
Check of gas system' s, heating systems' and DHW airtightness of the boiler .......................... 39
16.2.1.
Check of safety devices operation .................................................................................................. 39
16.2.2.
Check of heat carrier pressure sensor in the heating system ...................................................... 39
16.2.2.1.
Check of heat carrier overheating protection in the heating system .......................................... 39
16.2.2.2.
Check of bypass valve operation .................................................................................................... 39
16.2.2.3.
Checking of safety valve operation ................................................................................................ 39
16.2.2.4.
Air removal valve check ................................................................................................................. 39
16.2.2.5.
Check of gas supply regulator operation ...................................................................................... 39
16.2.2.6.
Ionization plug check ...................................................................................................................... 39
16.2.2.7.
Check of combustion products removal control devices ............................................................. 40
16.2.2.8.
Check of CH temperature sensor .................................................................................................. 40
16.2.2.9.
Check of DHW temperature sensor ........................................................................................... 40
16.2.2.10.
Check of water flow sensor in the DHW circuit ....................................................................... 40
16.2.2.11.
Check of air pressure in the expansion tank ............................................................................. 40
16.2.2.12.
Check of the air inlet and combuction products output systems' airtightness ......................... 40
16.2.3.
Check of water consumption in DHW .......................................................................................... 41
16.2.4.
Check of heating system's contamination ..................................................................................... 41
16.2.5.
BOILER'S DISASSEMBLING AND DISMANTLING OF MAIN BLOCKS.............................. 41
17.
Burner block dismantling ................................................................................................................... 41
17.1.
Primary heat exchanger dismantling ................................................................................................ 42
17.2.
Pump dismantling ............................................................................................................................... 43
17.3.
Secondary heat exchanger dismantling ............................................................................................ 44
17.4.
3 way valvedisassembling.................................................................................................................... 45
17.5.
Bypass valve dismantling ................................................................................................................... 45
17.6.
Expansion tank disassembling............................................................................................................ 46
17.7.
UTILIZATION .................................................................................................................................... 46
18.
WARRANTY LIABILITIES ............................................................................................................. 47
19.
............................................................................................................................................................... 48
20.
............................................................................................................................................................... 48
21.
............................................................................................................................................................... 49
22.
SUPPLY PACKAGE........................................................................................................................... 50
23.
Annex I. Spare parts catalogue ..................................................................................................................... 53
Annex II. Membrane expansion tank selection directions ........................................................................ 64
Annex III. Electric circuit diagrams of the boiler ....................................................................................... 66
.......................................................................................................................................................................... 70
User's Manual
4
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