• Uses rectification principle of electronic flame detection
• Primary control provides solid state, electronic flame safeguard protection for industrial and commercial single or dual fuel burners for rectification type flame detection
• 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
• Solid state circuitry
• Mounts and removes easily through use of captive mounting screws
• Mounting base is made of strong thermoplastic
• Includes SPDT alarm contacts Honeywell Protectorelay RA890F1288 Flame Safeguard Primary Control, 120 VAC at 50/60 Hz, SPDT
  
  

  R202-52R

Interrupted ignition type
• Combine a Protectorelay unit for cycling the burner and a Pyrostat flame detector for sensing temperature changes of flue gases up to 1000 deg F
• Manual reset of safety switch required after ignition failure completely shuts off main burner
• Include manual trip safety switch to assure burner shutdown during servicing
• Mount with flange for mounting on curved or flat surfaces
• Works with 2-wire and 3-wire 24 VAC thermostat
• 2 years warranty
  Sid Harvey Remanufactured R20R
  
  

  R20R

R106-3R

R202-22R

R202-46R

R216-18R

• Provide intermediate switching of a line voltage device from a low voltage controller
• Integral transformer provides low voltage power for control circuit
• Includes enclosure
• Contact rating: 10.2 amp at 120 VAC, 5.1 amp at 240 VAC full load; 61.2 amp at 120 VAC, 30.6 amp at 240 VAC locked rotor; 10 amp at 120 VAC, 6 amp at 240 VAC resistive Honeywell RA89A1074 Switching Relay, 120 volt Input, 24 VAC Coil at 50/60 Hz, 0.4 amp Coil, SPST
  
  

  R510-15R

R75-29R

R75-58R

R80-52R