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Summary of Contents for Sit 501 EFD
- Page 1 SIT Group 5 0 1 E F D Electronic Flame Failure Device...
- Page 2 5 0 1 E F D DESCRIPTION FEATURES SEQUENCE OF OPERATIONS TECHNICAL DATA INSTALLATION...
- Page 3 The 501 EFD automatic direct burner ignition (DBI) unit has been designed for atmospheric and fan assisted burners which require non volatile lock-out. This SIT Flame Failure Device is a solid state controller based on the well known and proven rectification effect of flame ionization.
- Page 4 Basic features include - Compact design - Remote, manual reset function - Multiple plug-in connectors - Well established electronic technology for high reliability - Atmospheric burner applications - Trial for ignition after flame loss - Permanent lock-out visualization, also without thermostat input - Wide range of operating ambient temperature Options available...
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Page 5: Sequence Of Operations
ATMOSPHERIC Normal operation (atmo- D B I APPLICATION spheric or fan assisted) During the waiting or purge time, Tw or Tp, the circui- try verifies that there is no parasitic flame signal pre- sent. If the unit is used in a fan assisted application, the air pressure switch is verified to be in the N.C. -
Page 6: Technical Data
AMBIENT TEMPERATURE -20 to + 80 °C HUMIDITY 95% max at 40 °C SUPPLY VOLTAGE 230 Vac -15%, +10%, 50-60 Hz POWER CONSUMPTION 10 VA ELECTRICAL RATINGS valve output: 230 Vac, 0,5 A, cosf=0,6 fan output: 230 Vac, 0,5 A, cosf=0,6 flame relay output: 230 Vac, 0,5 A, cosf=0,6 alarm output: 230 Vac, 0,5 A, cosf=1 ELECTRICAL CONNECTIONS... -
Page 7: Installation
To ensure reliable long term operation, mount the 501 EFD in a low ambient temperature and low heat radiation INSTALLATION position in the appliance. High tempera- tures could reduce product life. - Page 8 control. For applications that operate Flame check at high temperature, some insulation, shielding and forced air circulation may The minimum flame ionization current be necessary to keep the control ope- rating properly. is 0.5µA. For a stable flame detection this current under normal conditions should be higher than 1µA.
- Page 9 5 0 1 E F D...
- Page 10 SIT La Precisa Viale dell'Industria 31/33 35129 PADOVA - ITALY Tel. 049/8293111 - Fax 049/8070093 - Telex 430130 SITEC I...
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