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USER INSTRUCTIONS
TABLE OF CONTENTS
1 OPERATING WITH THE DUETTO HE 25-35 EV THERMAL UNIT 54
1.1 Control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
1.2 Preliminary checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
1.3 Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
1.4 Adjusting the heating temperature . . . . . . . . . . . . . . . . 55
1.5 Adjusting the hot water temperature . . . . . . . . . . . . . . 55
1.6 Possible faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
1.6.1 Safety thermostat . . . . . . . . . . . . . . . . . . . . . 55
1.6.2 Burner lock-out . . . . . . . . . . . . . . . . . . . . . . 55
1.6.3 System low pressure (replenishment) . . . . 56
1.6.4 Faulty pump . . . . . . . . . . . . . . . . . . . . . . . . . 56
2.1 Temporary shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
2.2 Shutting down for long periods . . . . . . . . . . . . . . . . . . . 56
3.1 Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.2 External cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.2.1 Cleaning the cladding. . . . . . . . . . . . . . . . . . 57
4.1 Disposal of the equipment (European Directive
2012/19/EU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
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