275

Product Image - 275
Product Image - 275
Product Image - 275
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Discontinued - Replaced By: 294

Part of the Multi-Staging Controls Series

Ordering Code: 275

UPC: 779655027501

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

 

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The boiler control 275 is designed to stage up to four condensing or non-condensing, modulating or on-off boilers using P.I.D. staging to accurately maintain temperature. Water temperature is controlled by outdoor temperature reset for space heating applications or a fixed setpoint for domestic hot water (DHW) tank heating or industrial process heating applications. The control will also accept an analog 0-10 V (dc) signal from an energy management system (EMS) to control the water temperature. Boiler equal run time rotation, pump exercising and stand-by system pump operation increase boiler plant reliability. The control is tekmarNet(R) communication compatible allowing for internet connectivity using an optional Gateway 483.

Features

  • Outdoor temperature reset, programmable schedules
  • warm weather shut down, automatic boiler differential
  • tekmarNet (R) 4 compatible, condensing and non-condensing boiler groups
  • Control up to 4 modulating or on/off boilers, primary pump sequencing
  • DHW pump operation, DHW priority (optional)
  • Equal run time rotation, exercising
  • Powered system pump output, alerts
  • Boiler pump(s) operation (optional), test sequence to ensure proper component operation
  • Access levels
Specifications
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 IN H x 7 9/16 IN W x 2 13/16 IN D (170 x 193 x 72 MM)
Enclosure Material Blue PVC plastic
Enclosure NEMA Rating NEMA 1
Hydronic - HVAC Control Type Boiler Control
Modulating Output 0 - 10 V (dc), Minimum 2500 ohms
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

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