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The Boiler Control 261 is a microprocessor-based two stage boiler control designed to regulate the supply water temperature from a single two stage boiler or two single stage boilers based on either outdoor air temperature or a setpoint demand. The 261 can stage and rotate two single fire boilers or it can stage a single Lo/Hi fire boiler. The 261 also operates the system pump.

  • Literature: D 261, A 261's, D 001, D 070
  • Control: Microprocessor PID control; This is not a safety (limit) control
  • Packaged Weight: 3.0 lb. (1340 g), Enclosure A, blue PVC plastic
  • Dimensions: 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm)
  • Approvals: CSA C US, meets ICES & FCC regulations for EMI/RFI
  • Ambient Conditions: Indoor use only, 32 to 113+F (0 to 45+C), < 90% RH non-condensing
  • Power Supply: 120 V +10% 50/60 Hz 1300 VA
  • Relays: 240 V (ac) 10 A 1/3 hp, pilot duty 240 VA
  • Demands: 20 to 260 V (ac) 2 VA
  • Sensors Included: NTC thermistor, 10 k @ 77+F (25+C +0.2+C) +=3892 Outdoor Sensor 070 and Universal Sensor 071
  • Optional Devices: Tekmar type #: 031, 032

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Multiple Boilers
2 Boiler
Width (Inches):
User Interface:
Push Button
Depth (Inches):
Ambient Conditions:
Indoor Only: 32°-113°F < 90% RH non-condensing
Power Supply:
120V (ac)
240 V (ac) 10 A-1/3 hp- pilot duty 240 VA
Temperature Range (F):
Max Temp (F):
Min Temp (F):
Microprocessor PID control
Weight (lbs):
3 lbs
20 to 260 V (ac) 2 VA
NTC Thermistor 10 k ohm @ 77°F
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