1. General instructions ................................................................................................................................................................. 55
2. Certifications ............................................................................................................................................................................. 55
3. Introduction ............................................................................................................................................................................... 56
4.1
Description of unit ........................................................................................................................................................................................ 56
4.2
Working principle ......................................................................................................................................................................................... 56
4.3
4.4
Identification ................................................................................................................................................................................................. 65
5. Installation ................................................................................................................................................................................. 65
5.1
Packing ........................................................................................................................................................................................................ 65
5.2
Handling ....................................................................................................................................................................................................... 65
5.3
Installation room .......................................................................................................................................................................................... 66
5.4
Discharge of combustion products .............................................................................................................................................................. 67
5.5
Plumbing connections .................................................................................................................................................................................. 67
5.6
Front door opening and adjustment ............................................................................................................................................................. 69
5.7
Burner assembly .......................................................................................................................................................................................... 70
5.8
Flame control sight glass connection ........................................................................................................................................................... 70
5.9
Probe and bulb positioning .......................................................................................................................................................................... 71
6. Instrument panel ....................................................................................................................................................................... 72
6.1
Introduction .................................................................................................................................................................................................. 72
6.2
Description of panel ..................................................................................................................................................................................... 72
6.3
Conformity ................................................................................................................................................................................................... 72
6.4
Supply and identification ............................................................................................................................................................................. 72
6.5
Structure ..................................................................................................................................................................................................... 73
7. Wiring diagrams ........................................................................................................................................................................ 73
7.1
7.2
9. Startup ........................................................................................................................................................................................ 77
9.1
Preliminary checks ....................................................................................................................................................................................... 77
9.2
First ignition ................................................................................................................................................................................................. 77
9.3
Boiler shutdown ........................................................................................................................................................................................... 77
10. Maintenance .............................................................................................................................................................................. 77
10.1
General rules ............................................................................................................................................................................................... 77
10.2
Routine maintenance ................................................................................................................................................................................... 77
10.3
Extraordinary maintenance .......................................................................................................................................................................... 77
10.4
Boiler cleaning ............................................................................................................................................................................................. 78
10.5
Boiler operation check ................................................................................................................................................................................. 78
10.6
Burner operation check ................................................................................................................................................................................ 79
10.7
Troubleshooting ........................................................................................................................................................................................... 79
EN
54
cod. 30902840 - Rev. 00 - 02/2018
PREX H 3 COND