Data Sheet Electronic Oil Burner Control OBC 82.10 Description and simultaneously show a flash code. Besides this, up to five other fault types can be read out as flash codes when the control is in lockout. The design complies with the requirements of the RoHS and WEEE directive. Application and features ▪ For 2 stage burners up to 30 kg/h ▪ For burners with or without preheater ▪ Precise and reproducible timings ▪ Limitation at 3 restarts by flame failure within the same operating period ▪ Limitation of 10 min. on preheating time ▪ Remote alarm output ▪ Indication of reason for lockout ▪ Indication of preheating and operation The microprocessor based control OBC 82.10 offers stable and precise timings independent of variations in supply voltage and ambient temperature. The control is undervoltage protected in accordance with EN 230:2005. In case of undervoltage the control will prevent the burner from starting Function The OBC 82.10 controls the cut-in and cut-out of the oil burner’s components and monitors that the combustion cycle is performed safely. When the boiler thermostat (TR) cuts in, heating of the oil in the oil preheater (OFV) will begin. Once the release temperature is reached and the oil preheater’s thermostat (OTR) cuts in, the burner motor will start the pre-purge and power will simultaneously be applied to the ignition (TT). Following the pre-ignition and pre-purge time, the oil will be released by valve V1 being opened and subsequently V2 will be opened. When the boiler thermostat opens after the heating period power will be cut off and all relays at the outputs will open and be ready for the next start-up cycle. Operating information OBC 82.10 is equipped with a two-coloured LED which displays both the operating status and can indicate the causes of errors leading to lockout. In the event of operating lockout, the cause of error can be read out as a flash code by holding down the reset button for at least 5 seconds and then releasing it. Undervoltage will, however, be displayed automatically. Reset can be performed directly in alarm mode (constant red light) or in flash code mode by pressing the reset button for at least 0.5 seconds but no more than 3 seconds. In flash code mode it is possible to return to alarm mode by holding down the reset button again for at least 5 seconds. Normal operation When the boiler thermostat (TR) cuts in, the reset button flashes green. As soon as the preheater thermostat (OTR) cuts in, the reset button lights up constant green. When the boiler thermostat cuts out, the green light turns off. Errors during operation (flash codes): ▪ If the mains voltage falls below 185 V before start-up, the control will be blocked from starting. If the mains voltage falls below 170 V during operation, the oil supply and burner will be stopped. In both cases, the reset button will automatically flash 8 times. When the mains voltages reaches 185 V, the control will restart as normal. Please note that the control cannot be reset if the mains voltage is below 170 V. ▪ If the mains voltage exceeds 264 V, the control will automatically enter alarm mode. The purpose of the overvoltage cut out is not simply to protect the electronics in the control, but also the other components in the burner. ▪ If light is registered in the final stage of the pre-purge time, the control will not release oil and will enter alarm mode. ▪ If no flame is established at the start, i.e. by the end of the safety time, the control will enter alarm mode. ▪ In the event of a flame failure during operation, the oil supply will be cut off after no more than 1 second and the control will re11/2011 1 Danfoss Heating Solutions VDACY202 © Danfoss
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