Provides high limit, low limit and circulator control for maintaining boiler temperatures
• Can provide multizone control by using a separate thermostat and R845 Relay for each zone
• An internal transformer powers the thermostat circuit
• Shielded capillary allows convenient mounting
• Consists of a diaphragm powerhead and micro switch assembly that responds to temperature changes in the boiler water
• Mounting lugs on back of case
  
  

  C317-13R

• Immersion type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems, including domestic hot water
• Provides multi zone control by using a separate circulator and relay for each zone
• Includes diaphragm power head and Micro-Switch assembly that respond to temperature changes in boiler water
• Mounts directly to boiler
• Requires a 24 VAC thermostat with heat anticipator set at 0.2 amp Sid Harvey Item #:C317R: Replaces Part #:'s : AQU8124A1007-C317-2B | C317-2B | C317-2R,
  
  

  C317R

• Envigado, a low-cost 3-wire communication protocol that allows different devices, such as communicating thermostats, Aquastat and oil primaries, to connect and share information Honeywell L7224U1002 Electronic Oil Aquastat, 120 VAC, 130 - 240 deg F High Limit, 110 - 220 deg F Low Limit , 5 - 20 deg F Fixed High Limit, 10 - 25 deg F Adjustable Low Limit Differential
  
  

  Sid Harvey Remanufactured C317-14R

Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
• Include diaphragm powerhead and micro Switch assembly that respond to temperature changes in boiler water
• Mount directly to boiler
• Provide multi-zone control by using a separate circulator and R845 relay for each zone
• Electrical burner rating: full load - 7.4 amp at 120 VAC line voltage, 3.7 amp at 240 VAC; locked rotor - 44.4 amp at 120 VAC line voltage, 22.7 amp at 240 VAC
• Electrical circulator rating: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC full load; 44.4 amp at 120 VAC, 22.2 amp at 240 VAC locked rotor

C317-8R

C290R

C255-140R

• The PA404 is a series 40 (2-wire, SPST) Pressuretrol controller for use in 24, 120, 240 or 277 volt control circuits or in self powered (millivoltage) applications
• The PA404B is used with suspension-type unit heaters to make the fan circuit when a pressure rise indicates the presence of steam
• Each model contains an SPST micro-switch snap-acting switch
• Sensitive pressure-actuated diaphragm expands or contracts with pressure variations, moving a lever mechanism which operates the snap switch
• A screw on top of the case allows set point adjustment without removing the cover
• Differential is adjusted by means of a dial located inside the case
• Recommended minimum set point is differential setting plus 1-1/2 psi
• Tradeline value
• Stainless steel diaphragm sensor element
• Additive or subtractive differential type
• Makes at set point plus differential on pressure rise, breaks at set point on pressure fall
• 50 psi pressure surge
• 0.5-9 psi adjustable scale range,
  
  

  C354-1R

EC-50R

N28-15R

Left hand nozzle port location



P1-20R

Right hand nozzle port location



P1-21R

P108-20R