McDonnell & Miller B122-4

Amtrol Parts B135-70

Amtrol Parts B135-48

Burner circuit contacts open after 15 sec delay in a low water condition
• Automatically reactivates burner circuit 30 sec after water reaches the probe, allowing optional water feeder to raise water level above the probe
• Intermittent level test (ILT) feature provides maximum boiler protection by removing power from the burner circuit at set intervals
• NEMA 1 enclosure
  

  Hydrolevel CG4501560

Intermittent level test - maximum protection for foaming boilers
• 15 sec burner off delay
• 30 sec burner on delay
• Low water indicating light
• Direct boiler mounting - eliminates blowdowns
  

  Hydrolevel CG400-2090

McDonnell & Miller CO-12

• Totally enclosed micro switch snap-acting switches operate on temperature rise to setpoint
• Visible control point scale and external adjustments screw permit easy setting
• Horizontal or vertical insertion of the sensing element
• Remote bulb model may be used to sense air temperature in ducts and in outside air sensing applications
• Direct or well immersion of the sensing element
• Includes heat-conductive compound, well adapter Honeywell L4006E1067 High Limit Manual Reset Aquastat, 130 - 270 deg F, 10 - 25 deg F Differential
  

  Honeywell C290-6

Totally enclosed micro switch snap-acting switch
• Visible control point scale and external adjustments screw permit easy setting
• Available horizontal or vertical mounting of the remote element into boiler, tank or other container
• Remote temperature sensing element detects and responds rapidly to temperature changes
• Case mounts to a vertical surface
• Includes 66" length capillary tubing, stop factory set at 240 F
  

  Honeywell C293-4

Honeywell C293-3

Totally enclosed micro switch snap acting switches operate on temperature rise to setpoint
• Visible control point scale and external adjustments screw permit easy setting
• Horizontal or vertical insertion of the sensing element
• Direct/well immersion of the sensing element
• Remote bulb model may be used to sense air temperature in ducts and in outside air sensing applications
• Contacts break on temperature rise
• Screw terminals wiring
  

  Honeywell C290-6A

• Immersion-type controllers that combine high limit protection with switching relay control of burner and circulator motors
• High limit opens burner circuit only
• Require 24 VAC thermostat with heat anticipator set at 0.2 amp (plus current draw of gas valve on L8124E)
• 1-1/2 - 3" depth less well insulation
• Electrical burner rating: at full load: 7.4 amp at 120 VAC, 3.7 amp at 240 VC; at locked rotor: 44.4 amp at 120 VAC, 22.2 amp at 240 VAC; millivolt: 0.25 amp at 1/4 - 12 VDC
• Electrical circulator rating: at full load: 7.4 amp at 120 VAC, 3.7 amp at 240 VAC; at locked rotor: 44.4 amp at 120 VAC, 22.2 amp at 240 VAC Honeywell L8148J1009/U Aquastat Relay, 120 VAC at 60 Hz, SPST, 120 - 240 deg F High Limit, 8 deg F Fixed Differential
  

  Honeywell C312-9

Non adjustment


Gorton Heating C18A