256
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Part of the Boiler and Mixing Controls Series
Ordering Code: 256
UPC: 779655025606
Boiler Control, 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.
Features
- Outdoor temperature reset
- Setback input for night setback
- Warm weather shut down
- automatic boiler differential
- Quick setup for easy installation and programming
- Advanced settings to fine-tune building requirements
- Test sequence
- CSA C US certified (approved to applicable UL standards)
| Specifications | |
|---|---|
| Agency Approvals | CSA C US, meets class B: ICES & FCC Part 15 |
| Ambient Conditions | Indoor use only, 32 to 104 degrees F (0 to 40 degrees C), RH less than or equal to 90 percent Non-condensing |
| Control Type | Microprocessor control, this is not a safety (limit) control |
| Demand | 24 V (ac) 2 VA |
| Dimensions | 4 3/4 IN H x 2 7/8 IN W x 7/8 IN D (120 x 74 x 22 MM) |
| Enclosure Material | White PVC plastic |
| Enclosure NEMA Rating | NEMA 1 |
| Hydronic - HVAC Control Type | Boiler Control |
| Markets | Single-Family Homes |
| Power Supply | 24 V plus / minus 10 percent, 50/60 Hz, 3 VA, Class 2 |
| Relay | 240 V (ac) 5 A 1/6 hp |
| Sensor | NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892 |
Literature
-
- Applications - 256 (May 2000 - Present)
- Brochure - Energy Savings with Outdoor Reset (Apr 2012 - Present)
- Catalog - tekmar Controls
- Installation and Operation - 256 (Oct 2019 - Present)
- SB054 - RF Noise Interference (May 2009 - Present)
- Specification Sheet - 256 (Jan 2011 - Present)
- Troubleshooting Guide - Sensor Testing
Archived