Controls oil burner, oil valve (if desired) and the ignition transformer in response to a call for heat
• Solid state flame sensing circuit
• LED on terminal strip indicates system lockout Remote lockout indication
• Enclosed safety switch with external reset button
• Manual trip lever opens safety switch for system maintenance
• Mounts on standard 4 x 4" junction box
• C554A cadmium sulfide flame detector and 24 VAC thermostat required
• With 30 sec safety timing, alarm outputs and manual safety switch
  
  

  R75-42R

• Intermittent ignition kwik-sensor CAD cell relays on oil burner systems with 15, 30 or 45 sec safety timing
• Certain types have unique signal-light feature with glows whenever safety lock-out occurs
• Line voltage safety switch eliminates burner run-on in the event that the motor relay contacts weld closed
• Solid state flame detection circuitry is not affected by vibration or high or low ambient temperatures
• Recycles on momentary flame failure or power interruption
• 4 x 4 Inch junction box, 10 Inch leads mounting
• 2 wire thermostat
• 0.4 amp thermostat anticipator setting
• Safety lock-out lamp White Rodgers Cooling Controls 668-401 Gray Metal Enclosure Kwik-Sensor CAD Cell Relay, 120 VAC, 45 sec
  
  

  R79-6R

R75-41R

R75-50R

• Ignition comes on for duration of safety timing if flame fails during operation
  
  

  R75-61R

Sid Harvey Remanufactured R75-52R

Controls oil burner, oil valve (if desired) and the ignition transformer in response to a call for heat
• Solid state flame sensing circuit
• LED on terminal strip indicates system lockout
• Remote lockout indication
• Enclosed safety switch with external reset button
• Manual trip lever opens safety switch for system maintenance
• Mounts on standard 4 x 4" junction box
• C554A cadmium sulfide flame detector and 24 VAC thermostat required
• With 15 sec safety timing, alarm outputs and manual safety switch

R75-40R

R75-51R

S14-1R

VP20R

Sid Harvey Remanufactured 543-11R

Immersion type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems
• Provide multi-zone control by using a separate circulator and R845 relay for each zone
• Include diaphragm powerhead and micro switch assembly that respond to temperature changes in boiler water
• Mount directly to boiler
• Select models include large transformers and extra terminals for supplying power to low voltage zone valves
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
  
  

  C317-5R