User’s manual
13.3.2. Gas analysis
function............................................................................................................................................................................ 27
13.4. Boiler’s operating
logic………………......................................................................................................................................................... 27
13.4.1. Boiler’s operation in CH
mode................................................................................................................................................................................ 27
13.4.2. Boiler’s operation in DHW
mode…………………………….................................................................................................................................... 28
13.4.3. Boiler’s operation in combined
mode………………………………................................................................................................................................ 28
14. SEARCH FOR FAILURES AND THEIR
ELIMINATION............................................................................................................................................................... 29
14.1. Error codes……...................................................................................................................................................... 29
14.2. Other failures…...................................................................................................................................................... 31
15. HANDING THE BOILER OVER TO THE
CUSTOMER................................................................................................................................................................... 32
16. TECHNICAL SERVICE AND OPERATION
CHECK............................................................................................................................................................................ 32
16.1. Technical
service……….................................................................................................................................................................. 32
16.1.1. Cleaning the burner
block................................................................................................................................................................................ 32
16.1.2. External cleaning of heat
exchanger......................................................................................................................................................................... 33
16.1.3. Internal cleaning (washing) of heat
exchanger......................................................................................................................................................................... 33
16.2. Boiler’s operation
check................................................................................................................................................................................ 33
16.2.1. Checking of gas and water boiler systems’ leak-
resistance......................................................................................................................................................................... 34
16.2.2. Checking of safety devices
operation.......................................................................................................................................................................... 34
16.2.2.1. Checking of water pressure sensor in the heating
system.............................................................................................................................................................................. 34
16.2.2.2. Checking of water overheating protection in the heating
system.............................................................................................................................................................................. 34
16.2.2.3. Checking of bypass valve
operation.......................................................................................................................................................................... 34
16.2.2.4. Checking of safety valve
operation…………………………….............................................................................................................................. 34
16.2.2.5. Air removal valve
checking……………………........................................................................................................................................... 34
16.2.2.6. Checking of gas supply regulator
operation.......................................................................................................................................................................... 34
16.2.2.7. Ionization plug
checking........................................................................................................................................................................... 34
16.2.2.8. Checking of control devices for combustion products
removal............................................................................................................................................................................ 35
16.2.2.9. Checking of CH temperature
sensor............................................................................................................................................................................... 35
16.2.2.10.Checking of DHW circuit temperature
sensor............................................................................................................................................................................... 35
16.2.2.11. Checking of flow sensor of hot water supply
circuit............................................................................................................................................................................... 35
16.2.3. Checking of water pressure in the expansion
tank.................................................................................................................................................................................. 35
16.2.4. Checking of the air inlet and combustion products output system’s air
tightness........................................................................................................................................................................... 35
16.2.5.Checking of water consumption in
DHW................................................................................................................................................................................ 35
16.2.6. Checking of heating system’s with respect to its
stoppage........................................................................................................................................................................... 35
