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  Tekmar Boiler Control-Four tN4, BAS, Four Boiler, DHW & Setpoint
Tekmar Boiler Control-Four tN4, BAS, Four Boiler, DHW & Setpoint
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Tekmar Boiler Control-Four tN4, BAS, Four Boiler, DHW & Setpoint

The Boiler Control 284 is designed to operate up to four boilers to accurately maintain a target water temperature. The 284 operates both condensing & non-condensing boilers that are either modulating, single stage or two stage to provide a flexible, cost effective mixed boiler plant solution with better system performance. The target water temperature is based on outdoor temperature reset or a fixed setpoint for space or process heating applications. Additional loads supplied by the 284 include domestic hot water & fixed setpoint heating. Boiler equal run-time rotation, stand-by primary pump operation & pump exercising all increase boiler plant reliability. The 284 communicates with a Building Automation System (BAS) using BACnet® or Modbus® for remote monitoring & adjustment capability. tekmarNet® Thermostats or a tN4 Gateway 483 can be added to optimize system performance & provide remote monitoring capability.


  • BACnet® or Modbus® communication
  • Combustion air damper control
  • Condensing & non-condensing boiler groups
  • Control up to four boilers
  • DHW Priority
  • Energy, flow and pressure monitoring
  • Modulating, single stage or two stage
  • Outdoor Temperature Reset
  • Primary pump sequencing
  • Programmable Schedules
  • Setpoint operation
  • tekmarNet® 4 Compatible


Control Microprocessor control. This is not a safety (limit) control
Packaged weight 5.5 lb. (2490 g)
Dimensions 8-1/16" H x 11-1/8" W x 2-15/16" D (204 x 282 x 74 mm)
Enclosure Blue PC+ABS plastic with metal top & bottom conduit connection walls, NEMA type 1
Approvals CSA C US, meets class B: ICES & FCC Part 15
Ambient conditions Indoor use only, 32 to 122°F (0 to 50°C), <90% RH Non-condensing
Power supply 115 V (ac) ±10%, 60 Hz, 18 VA
Primary pump relays 230 V (ac) 10 A, 1/2 hp
Boiler & IDHW pump relays 230 V (ac) 5 A, 1/3 hp
Auxiliary & Alert relays 230 V (ac) 5 A, 1/6 hp
Auxiliary & Alert relays 230 V (ac) 5 A, 1/6 hp
Modulating outputs 4 x 0-10 V (dc) 500 Ω minimum load impedance / 4-20 mA 1 kΩ max load impedance
Calls 24 V (ac) or Short
Sensors NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
-Included Outdoor Sensor 070, and 2 of Universal Sensor 082
-Optional tekmar type #:071,078,082
Warranty Limited 3 Year Warranty

Current Literature

BAS Integration Manual

Sep 2013 - Present


Product Submittal

Jun 2013 - Present


Installation & Operation Manual

Sep 2013 - Present


Application Brochure

May 2010 - Current


RF Noise Interference

May 2009 - Present

284 Product Spotlight P9450pdf
New Boiler Control 284 Is Compatible with Building Automation Systems P0017pdf
tekmar Becomes a Member of BACnet P0019pdf

Energy Savings with Outdoor Reset Brochure


See More

284 Introduction Video   Customizing the 284 Boiler Control



Part Number: 284

2 +$2,156.66

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