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Part of the 557 Series

Ordering Code: 557

UPC: 779655055702

tekmarNet Thermostat, Radiant Floor, 2 Heat Pump/Cool, Backup, Humidity


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  • Optimum start, scenes
  • Radiant floor heating and cooling, outdoor and floor temperature display
  • Daylight savings time, backlight
  • Zone post purge, programmable schedule
  • Air group master, network schedule master or member
  • Auto heating cycle, tekmarNet (R) communication compatible
  • Temporary hold, away scene key
  • Warm weather shut down, zone synchronization
  • Touchscreen technology, 3 Auxiliary sensor inputs
Agency Approvals Meets Class B: ICES & FCC Part 15
Ambient Conditions Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), RH less than or equal to 90 percent non-condensing
Control Type Microprocessor control, this is not a safety (limit) control
Dimensions 4-1/2" H x 4-3/4" W x 7/8" D (114 x 120 x 22 mm)
Enclosure Material White PVC plastic
Enclosure NEMA Rating NEMA 1
Environmental Notice Compatible with chlorinated swimming pool environments. Do not use in presence of ammonia (animal barns), methanol, ethanol, acetone.
Humidity Sensor 0 to 90 percent plus / minus 3 percent RH
Power Supply 24 V plus / minus 10 percent, 60 Hz, 2 VA standby, NEC / CEC Class 2
Relay 24 V (ac) 2A , 0-10 V (dc) Output
Temperature Sensor NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta = 3892
Zoning - Thermostat Type tekmarNet Thermostat