The Boiler Control 268 is designed to stage multiple boilers using Outdoor Temperature Reset. It can be used in applications ranging from baseboard or mixed radiant heating systems, 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 9 on/off boilers as well as the system pump.
Advanced settings to fine-tune building requirements
Automatic Boiler Differential
Boiler Pump operation (optional)
Control up to 9 On-Off boilers
DHW Priority (optional)
DHW pump or valve operation
Equal Run Time Rotation
Exercising
Outdoor Temperature Reset
Powered system pump output
Quick setup for easy installation and programming of control
Setback input for energy savings
Test sequence to ensure proper component operation
User comfort adjustment to increase or decrease building space temperature
Warm Weather Shut Down
| 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%, 50/60 Hz, 600 VA |
| Relay | 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 8486; Resistor |
| -Optional | tekmar type #: 033, 071, 082 |
| Warranty | Limited 3 Year Warranty |
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.
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Installation & Operation Manual Addendum |
Oct 2003 - Present |
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Product Submittal |
Jan 2011 - Present |
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Installation & Operation Manual |
Nov 2010 - Present |
Application Brochure |
Nov 2010 - Current |
More advanced application drawings can be found in our Solutions section.
RF Noise Interference |
May 2009 - Present |