9Värmebaronen Viking Bio 35Electrical installationBoiler thermostat controls boiler temperatureThe burner’s phase supply must be preceded byoverheating protection and the control phase bya thermostat.230V~, 50Hz10AL N PEBLUEBLACKBROWNGRAYYELLOW / GREENNL1B4S3T2T1THERMAL PROTECTIONAND THERMOSTATSAFETY SWITCHBURNING SWITCHALARM 230V/1AElectrical connection check.1. The power switch and thermostat must bein the position ‘0’2. Switch the power switch to ‘I’; all theburner’s indicators should light up briefly.Subsequently, only ‘OPERATION’ shouldlight up.3. Turn the thermostat so that it requires heat;the ‘FLAME’ indicator should start to flash.If this does not happen, the connection mustbe checked.