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TECHNICAL FEATURES
AND DIMENSIONS ........................................................... pag. 6
1.1 Technical Features .................................................................. pag. 6
1.2 Dimensions .............................................................................. pag. 7
1.3 Technical Data and Main Components .................................... pag. 9
1.4 Side View ................................................................................. pag. 10
INSTRUCTIONS FOR INSTALLERS ................. pag. 11
2.1 Instructions for installation ...................................................... pag. 11
2.2 Installation ............................................................................... pag. 11
2.2.1 Packing ....................................................................... pag. 11
2.2.2 Boiler Location inside a Heat Power Plant ................. pag. 13
2.2.3 Boiler Connection ....................................................... pag. 13
2.2.4 Connection to Chimney .............................................. pag. 13
2.2.5 Notes on Condensate Drain ....................................... pag. 14
2.3 Types of Heating Systems ...................................................... pag. 15
2.3.1 C.H. System Air Vent.................................................. pag. 16
2.3.2 Boiler and System Filling-up & Draining .................... pag. 16
2.3.3 Max Allowable Working Pressure............................... pag. 17
2.3.4 Safety Valve ............................................................... pag. 17
2.3.5 Gas Mains .................................................................. pag. 17
2.3.6 Hydraulic Compensator or Open Manifold ................. pag. 17
2.3.7 Filter ........................................................................... pag. 18
2.3.8 Ball Valves .................................................................. pag. 18
2.3.9 Feeding Water Quality ................................................ pag. 18
2.3.10 Boiler Antifrost Protection .......................................... pag. 18
2.3.11 Min. Water Flow Rate .................................................. pag. 19
2.4 Boiler Operation ....................................................................... pag. 19
2.4.1 General Description .................................................... pag. 20
2.4.2 Ignition Sequence ....................................................... pag. 21
2.4.3 Supplementary Board ................................................. pag. 22
2.4.4 Domestic Hot Water (DHW) Mode Operation ............. pag. 23
2.5 Boiler Operation in case of technical intervention .................. pag. 23
2.6 Electric Connections ............................................................... pag. 24
2.6.1 Power Supply .............................................................. pag. 25
2.6.1 Wiring Diagram ........................................................... pag. 25
2.6.2 Electric Connection to Ignition PCB........................... pag. 26
2.6.3 Electric Connection to the Room Thermostat ............ pag. 26
2.6.4 DHW Storage Tank ..................................................... pag. 27
MODULAR BOILER DRIVE (MBD)
OPERATION .......................................................................... pag. 28
3.1 General Description ................................................................. pag. 28
3.2 Operation and display instructions .......................................... pag. 28
3.2.1 “Mode” Key .............................................................. pag. 29
3.2.2 “Step” Key ............................................................... pag. 29
3.2.3 “+ / -“ Key................................................................ pag. 29
3.2.4 “Store” Key .............................................................. pag. 29
3.2.5 Service Code .......................................................... pag. 29
3.2.6 Programming Access Procedure ........................... pag. 30
3.2.7 “Stand-by” Key ........................................................ pag. 32
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