Accorroni MEC25-85 Technical Information page 4

2. CONTROL AND SAFETY DEVICES ..................................................................................... 19
2.1 Control device ....................................................................................................................... 19
2.2 Gas unit ................................................................................................................................. 19
2.3 Differential pressure switch ................................................................................................... 19
2.4 Fan thermostat ...................................................................................................................... 20
2.5 Safety thermostat .................................................................................................................. 20
SECTION 2 - TECHNICAL INFORMATION FOR THE INSTALLER
3. PRECAUTIONS .................................................................................................................... 21
3.1 Gas Safety Regulations ......................................................................................................... 21
3.2 Related documents ................................................................................................................ 21
3.3 Transport and handling ......................................................................................................... 21
3.4 Data check ............................................................................................................................ 21
3.5 Using the instructions ............................................................................................................ 21
4. INSTALLATION ..................................................................................................................... 21
4.1 Location ................................................................................................................................ 21
4.2 Minimum heights and distances ............................................................................................. 22
4.3 Air intake and flue exhaust ducts ........................................................................................... 23
4.4 Installation operations ............................................................................................................ 25
5. START-UP ............................................................................................................................ 26
5.1 Tests ..................................................................................................................................... 26
5.2 Ignition ................................................................................................................................... 27
5.3 Useful information .................................................................................................................. 28
6. GAS TYPE CHANGE ............................................................................................................ 28
6.1 Switching from gas in the second group to gas in the third group .......................................... 28
6.2 Switching from gas in the third group to gas in the second group .......................................... 29
7. OPERATING DEFECTS ........................................................................................................ 30
7.1 Preliminary tests .................................................................................................................... 30
7.2 Possible defects .................................................................................................................... 30
8. REPLACING PARTS ............................................................................................................. 33
8.1 Control equipment ................................................................................................................. 33
8.2 Fuse ...................................................................................................................................... 33
8.3 Gas solenoid valves .............................................................................................................. 33
8.4 Differential pressure switch ................................................................................................... 33
8.5 Control thermostat of the convection fan(s) ........................................................................... 34
8.6 Safety limit thermostat ........................................................................................................... 34
8.7 Electrodes ............................................................................................................................. 35
8.8 Second burner ignition transformer ................................... - Model 85 ................................... 35
8.9 Flue exhaust fan .................................................................................................................... 36
8.10 Convection fan ...................................................................................................................... 36
9. PERIODIC MAINTENANCE OPERATIONS .......................................................................... 37
9.1 User information .................................................................................................................... 37
9.2 Yearly inspection ................................................................................................................... 37
10. HEALTH AND SAFETY STATEMENT .................................................................................. 38
10.1 General ................................................................................................................................. 38
10.2 Cautionary note ..................................................................................................................... 38
10.3 Miscellaneous ....................................................................................................................... 38
10.4 Thermostat ............................................................................................................................ 38
10.5 Electrolytic capacitor ............................................................................................................. 38
SECTION 3 - USER OPERATING AND MAINTENANCE INSTRUCTIONS
11. START-UP ............................................................................................................................ 39
11.1 First firing and testing ............................................................................................................ 39
11.2 Tests ..................................................................................................................................... 39
11.3 Ignition ................................................................................................................................... 39
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