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10. ELECTRICAL SUPPLY 10.1 General A1. Start/stop through a volt free contact. 10.2 Electrical connections 10.3 Electrical data A2. Start/stop through the option 'analog'. Ω A3. Start/stop through the RS 232 bus. 10.4 Boiler control 10.4.1 General B. External control 10.4.2 Modulating B1.
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