Overview Primary control provides solid state, electronic flame safeguard protection for industrial and commercial single or dual fuel burners for rectification type flame detection. Features Uses rectification principle of electronic flame detection. Replaces RA890E in most applications and mounts on same Q270A1024 Subbase. Recycles if flame signal lost while in Run. Failure to establish pilot results in a lockout. Safe-start check prevents start-up if flame-simulating failure occurs in flame detector circuit. Includes built-in protection against ignition crossover in flame rod systems. Includes SPDT alarm contacts. Solid state circuitry. Mounts and removes easily through use of captive mounting screws. Mounting base is made of strong thermoplastic. Product Specifications ApplicationPrimary control for rectification application (Flame Rod for example) Dimensions (in.)5 in. high x 5 in. wide x 4 3/4 in. deep (including subbase) Dimensions (mm)127 mm high x 127 mm wide x 121 mm deep (including subbase) Temperature Range (F)60 Hz models -20 F to +115 F,50 Hz models -20 F to +105 F Temperature Range (C)50 Hz Models -29 C to +41 C,60 Hz Models -29 C to +46 C Frequency50 Hz; 60 Hz Approvals, Underwriters Laboratories Inc.UL Listed: 120V models only; File No. MP268, Guide No. MCCZ Approvals, Canadian Standards AssociationCSA Certified: 120V models only; File No. LR1620 Voltage 220 Vac Flame Failure Response Time (sec) 0.8 sec Safety Switch Timing15 seconds Alarm Relay SwitchingSPDT Approvals, Factory MutualApproved: Report No. 17678,19417,19784