2
TABLE OF CONTENTS
WARNINGS ............................................................................................................................................................... 5
PART I: INSTALLATION ........................................................................................................................................... 5
GENERAL FEATURES ................................................................................................................................................................... 5
How to interpret the burner “Performance curve” ........................................................................................................................... 6
Checking the proper gas train size ................................................................................................................................................ 6
BURNERS SPECIFICATIONS ....................................................................................................................................................... 7
Matching the burner to the boiler .................................................................................................................................................... 7
Specifications .................................................................................................................................................................................. 8
Country and usefulness gas categories .......................................................................................................................................... 9
Performance curves ...................................................................................................................................................................... 10
Overall dimensions ....................................................................................................................................................................... 12
MOUNTINGS AND CONNECTIONS ............................................................................................................................................ 14
Packing ......................................................................................................................................................................................... 14
Fitting the burner to the boiler ....................................................................................................................................................... 14
GAS TRAIN CONNECTIONS ....................................................................................................................................................... 15
Gas Proving System VPS504 (Option) ......................................................................................................................................... 16
ELECTRICAL CONNECTIONS .................................................................................................................................................... 17
Power supply without neutral ........................................................................................................................................................ 19
Combustion head pressure curves vs. the gas flow rate .............................................................................................................. 20
Measuring the gas pressure in the combustion head ................................................................................................................... 20
Plugs for pressure measurement .................................................................................................................................................. 20
Gas pressure in combustion head vs. gas flow rate curves .......................................................................................................... 21
Startup Output ............................................................................................................................................................................... 22
Adjustments - brief description ...................................................................................................................................................... 22
Adjustment procedure ................................................................................................................................................................... 22
Fully modulating burners ............................................................................................................................................................... 24
Calibration of air and gas pressure switches ................................................................................................................................ 24
Calibration of air pressure switch (only for single stage burners) ................................................................................................. 24
Calibration of air pressure switch (double-stage, progressive and fully-modulating) .................................................................... 24
Calibration of minimum gas pressure switch ................................................................................................................................ 25
Adjusting the high gas pressure switch (when provided) .............................................................................................................. 25
PART II: OPERATION ............................................................................................................................................. 26
Burner control panel ...................................................................................................................................................................... 27
OPERATION ................................................................................................................................................................................. 28
PART III: MAINTENANCE ....................................................................................................................................... 29
ROUTINE OPERATIONS ............................................................................................................................................................. 29
Removing the filter in the MULTIBLOC DUNGS MB-DLE 405..412 ............................................................................................ 29
Removing the filter in theMULTIBLOC DUNGS MB-DLE 415 - 420 ............................................................................................. 30
Removing and cleaning the combustion head .............................................................................................................................. 30
Replacing the electrodes .............................................................................................................................................................. 32
Electrodes position setting ............................................................................................................................................................ 32
Checking the ionisation current ..................................................................................................................................................... 33
Seasonal stop ............................................................................................................................................................................... 33
TROUBLESHOOTING .................................................................................................................................................................. 34
SPARE PARTS ............................................................................................................................................................................. 35
BURNER EXPLODED VIEW ........................................................................................................................................................ 36
ELECTRICAL WIRING DIAGRAMS ............................................................................................................................................. 38
APPENDIX
