Skip to Main Content


Part of the 274 Series

Ordering Code: 274

UPC: 779655027401

Boiler Control, One tN4, Four Stage Boiler and DHW, Setpoint


Quick Product Search

Quick links:

Control Selector

tekmar Home

  • Equal run time rotation, automatic boiler differential
  • DHW pump operation, DHW priority (optional)
  • Test sequence to ensure proper component operation
  • Exercising, powered system pump output
  • Optional boiler pump(s) operation, quick setup for easy installation and programming of control
  • Outdoor temperature reset, warm weather shut down
  • Advanced settings to fine-tune building requirements
  • Control up to 4 on-off boilers, primary pump sequencing (optional)
  • User comfort adjustment to increase or decrease building space temperature
Agency Approvals CSA C US, meets class B: ICES & FCC Part 15
Ambient Conditions Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent Non-condensing
Control Type Microprocessor control, this is not a safety (limit) control
Demand 20 to 260 V (ac) 2 VA
Dimensions 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm)
Enclosure Material Blue PVC plastic
Enclosure NEMA Rating NEMA 1
Hydronic - HVAC Control Type Boiler Control
Power Supply 115 V (ac) plus / minus 10 percent, 60 Hz, 7 VA, 1150 VA max
Relay 230 V (ac) 5 A, 1/3 hp
Sensor NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892