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Boiler Control 256 - One Stage Boiler

The Boiler Control 256 is designed to operate a single boiler using Outdoor Temperature Reset. It can be used in applications ranging from a single zone of baseboard to multiple zones of fan coils and baseboard. This control regulates a single heating water temperature through Outdoor Temperature Reset.

How do I purchase this product?

Contact your Local Representative for details.

The 256 replaces

219 Boiler Control
230 Boiler Reset Control
250 One Stage Boiler Control
253 One Stage Boiler Control

Features & Specs

Features (definitions)

Advanced settings to fine-tune building requirements
Automatic Boiler Differential
CSA C US certified (approved to applicable UL standards)
Outdoor Temperature Reset
Quick setup for easy installation and programming
Setback input for night setback
Test sequence
Warm Weather Shut Down

Specifications

Control	Microprocessor control. This is not a safety (limit) control
Packaged weight	1.3 lb. (580 g)
Dimensions	4-3/4" H x 2-7/8" W x 7/8" D (120 x 74 x 22 mm)
Enclosure	White PVC plastic, Nema type 1
Approvals	CSA C US, meets class B: ICES & FCC Part 15
Ambient conditions	Indoor use only, 32 to 104°F (0 to 40°C), RH ≤90% Non-condensing
Power supply	24 V ±10%, 50/60 Hz, 3 VA, Class 2
Relay	240 V (ac) 5 A 1/6 hp
Demand	24 V (ac) 2 VA
Sensors	NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
-Included	Outdoor Sensor 070 and Universal Sensor 071
-Optional	tekmar type #: 071, 082
Warranty	Limited 3 Year Warranty

Technical