Tekmar 257 Two Stage DHW Control

Description

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: 0.8lb (360g)
• Dimensions: 4-3/4″ x 2-7/8″ x 7/8″ (120 x 74 x 22 mm)
• 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 Included: NTC thermistor, 10 k @ 77+F (25+C +0.2+C) +=3892, Universal Sensor 082
• Optional Devices: Tekmar type #: 071, 078