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  Tekmar DHW Control -Two Stage
Tekmar DHW Control -Two Stage
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Tekmar DHW Control -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.

Features

  • 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 type 1
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
Relays 240 V (ac) 10 A max, 1/3 hp
Sensors NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
-Included Outdoor Sensor 070, Universal Sensor 082
-Optional tekmar type #: 071,078
Warranty Limited 3 Year Warranty

Current Literature

Product Submittal

Jan 2012 - Present

257_Cpdf

Installation & Operation Manual

Mar 2009 - Present

257_Dpdf

Application Brochure

Mar 2009 - Current

257_Apdf

RF Noise Interference

May 2009 - Present

SB0054_01pdf


Part Number: 257

Quantity
Price
1$260.45
2 +$241.68


 
 
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