DHW Control 257 - Two Stage
The DHW Control 257 is designed to operate multiple boilers for volume water heating. It can be used in hotels, apartments, and laundromats to control multiple boilers and provide quick recovery for domestic hot water. This control regulates a single hot water temperature through DHW control. It is capable of controlling up to 2 on/off boilers using a sensor to maintain a tank setpoint temperature.
How do I purchase this product?
Contact your Local Representative for details.- Features & Specs
Features (definitions)
2 Stage control
Cumulative boiler run time hours
Equal Runtime Rotation
Proportional or PID staging
Specifications
Control Microprocessor control. This is not a safety (limit) control Packaged weight 0.8 lb. (360 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 1 rated Approvals CSA C US, meets class B: ICES & FCC Part 15 Ambient conditions Indoor use only, -20 to 120°F (-30 to 50°C), RH ≤90% Non-condensing Power supply 24 V (ac) ±10%, 50/60 Hz, 3 VA Relay 240 V (ac) 10 A max, 1/3 hp Sensors NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 -Included Universal Sensor 082 -Optional tekmar type #: 071, 078 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
Mar 2009 - Present
- Applications
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Product Application Drawings
Application Brochure
Mar 2009 - 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 (1 total)
These are typical products that add more functionality to the DHW Control 257
