• EnviraCOM, a low-cost 3-wire communication protocol that allows different devices, such as communicating thermostats, aquastats 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, 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 ampSid Harvey Item #:C317R: Replaces Part #:'s : AQU8124A1007-C317-2B | C317-2B | C317-2R,
  

  Sid Harvey Remanufactured C317R

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)
  

  Sid Harvey Remanufactured C317-2R

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)
  

  Sid Harvey Remanufactured C317-7R

Sid Harvey Remanufactured A28-69R

• Continuous maintenance minimum safe water level, independent of electrical device
• Direct action feeder mechanism
• Quick hook-up fittings provided (new only)
• Quick-change replaceable cartridge valve and strainer
• Quiet, durable operation
• Isolated feed valve minimizes lime and scale build-up
• Blow-off valve
• Burner switch cut-off,
  

  Sid Harvey Remanufactured B110R

• Continuous maintenance of minimum safe water level, independent of electrical service
• Proportional feed action
• Quick hook-up fittings provided
• Quick change replaceable cartridge valve and strainer
• Model 47 can be field upgraded with a No #2 switch to add low water cut-off function Mcdonnell & Miller 47-2 Mechanical Water Feeder, 3/4 Inch NPT Threaded, 120/240 VAC
  

  Sid Harvey Remanufactured B110-1R

• Quick hook-up fittings provided
• Lever operated, full port ball valve for easy blow down
• Adjustable Bx outlet for easy installation
• Dual precision switches for dependable operation of cut-off, alarm or electric water feeder Mcdonnell & Miller 67 Mechanical Low Water Cut-Off, 120/240 VAC, 20 psi, Automatic Reset,
  

  Sid Harvey Remanufactured B103R

Sid Harvey Remanufactured B109R

Sid Harvey Remanufactured B144-5R

Sid Harvey Remanufactured B138-12R

Sid Harvey Remanufactured B163-92R