Boiler Control 274 - One tN4, Four Stage Boiler & DHW / Setpoint
The Boiler Control 274 is designed to stage multiple boilers using Outdoor Temperature Reset. It can be used in applications ranging from a single zone of baseboard, multiple baseboard and fan coil zones, to dedicated domestic hot water heating in commercial buildings. This control regulates a single heating water temperature through Outdoor Temperature Reset and/or setpoint/DHW target control. It is capable of controlling (stage and rotate) up to 4 on/off boilers as well as the system pump.
How do I purchase this product?
Contact your Local Representative for details.- Features & Specs
Features (definitions)
Advanced settings to fine-tune building requirements
Automatic Boiler Differential
Control up to 4 On-Off boilers
DHW Priority (optional)
DHW pump operation
Equal Run Time Rotation
Exercising
Optional boiler pump(s) operation
Outdoor Temperature Reset
Powered system pump output
Primary pump sequencing (optional)
Quick setup for easy installation and programming of control
Test sequence to ensure proper component operation
User comfort adjustment to increase or decrease building space temperature
Warm Weather Shut Down
Specifications
Control Microprocessor control. This is not a safety (limit) control Packaged weight 3.3 lb. (1500 g) Dimensions 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm) Enclosure Blue PVC plastic, 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), RH ≤90% Non-condensing Power supply 115 V (ac) ±10%, 60 Hz, 7 VA, 1150 VA max Relays 230 V (ac) 5 A, 1/3 hp Demands 20 to 260 V (ac) 2 VA Sensors NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 -Included Outdoor Sensor 070, 2 of Universal Sensor 082, and 500 Ω Resistor -Optional tekmar type: 071, 078, 082 Warranty Limited 3 Year Warranty - Technical
In most cases the current version of literature will work, otherwise use the piece of literature most closely matching the date code of your product.
Current Literature
Product Submittal
Jan 2011 - Present
Installation & Operation Manual
Nov 2012 - Present
- Applications
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Product Application Drawings
Application Brochure
Nov 2012 - Current
More advanced application drawings can be found in our Solutions section.
- Service Bulletins
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Active Service Bulletins
RF Noise Interference
May 2009 - Present
tekmar Accessory Products (10 total)
These are typical products that add more functionality to the Boiler Control 274
