• 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)

C317-2R

C317-2R

R80-52R

R80-52R

• Immersion type aquastat controller and oil burner primary control provides high limit and low limit/circulator control for oil-fired hydronic heating systems
• Use in intermittent ignition applications
• Capable of zone control with zone valves
• Circulator zone control with ZC and ZR terminals on R8182D, E, H, J
• 8-flame failure during the running cycle results in a 45 sec attempt to restart
• If unsuccessful, safety shutoff occurs, requiring manual reset before burner can be restarted
• C554A cadmium sulfide flame detector and a 24 VAC thermostat required
• Includes auxiliary ZC and ZR terminals may be used to provide circulator zone control through an R845A switching relay, horizontal case
• Maximum 250 deg F at element, 15 deg F fixed high limit differential temperature
• 45 sec safety switch timing
• 1/2"-14 NPT well spud size
• 0.2 amp anticipator setting
• 1-1/2" insulation depth,
  
  

  R80-58R

  ,
  

  R80-58R

R80-40R

R80-40R

R80-30R

R80-30R

R80-32R

R80-32R

R75-41R

R75-41R

• 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

R75-42R

• Ignition comes on for duration of safety timing if flame fails during operationSid Harvey Item #:R75-61R: Replaces Part #:'s : R75-61R,
  
  

  R75-61R

  ,
  

  R75-61R

R75-58R

R75-58R

• 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

R75-40R

B163-14R

B163-14R