422

Product Image - 422
Product Image - 422
Product Image - 422
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Part of the Boiler and Mixing Controls Series

Ordering Code: 422

UPC: 779655042207

Universal Reset Module, Two tN4, Mixing, Boiler, DHW and Setpoint

 

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The Universal Reset Module 422 is designed to operate all of the mechanical equipment in a hydronic heating system, except for zones, coordinating their operation through network communication. It can be used in applications ranging from a single zone of baseboard with an on/off boiler to multiple fan coils, mixed radiant floor zones, and a modulating/condensing boiler. This control regulates up to two heating water temperatures through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, and can expand up to 24 zones in total for each heating water temperature.

Features

  • Outdoor temperature reset, indoor temperature feedback
  • Warm weather shut down, zone synchronization
  • DHW post purge, DHW control
  • DHW priority (optional), expandable up to 48 zones
  • Single on/off or modulating boiler control, variable speed, or floating action mixing control
  • Automatic boiler differential, Exercising
  • Boiler protection, powered pump outputs
  • System setback (with optional Timer)
  • One touch overrides (with optional User Switch)
Specifications
Agency Approvals CSA C US, CSA/UL 61010-1, meets Class B: ICES & FCC Part 15
Ambient Conditions Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), Max. RH 92 percent for temperatures up to 40 degrees C, 50 percent RH at greater than 40 degrees C, Altitude less than 6560 feet (2000 m), Installation Category II, Pollution Degree 2
Boiler Relay 115 V (ac) 5 A
Combined Load 10 A Max. (for DHW, Primary, Mixing & Var. Speed Pump)
Control Type Microprocessor PID control, this is not a safety (limit) control
Demand 20-260 V (ac) / 0.1 VA at 24 V
Dimensions 3 5/8 IN H x 5 3/8 IN W x 9/16 IN D (92 x 137 x 14 MM)
Enclosure Material Does Not Apply To Product
Enclosure NEMA Rating Does Not Apply To Product
Floating Action Load 24 V (ac) 8 VA Maximum
Hydronic - HVAC Control Type Universal Reset Module
Modulating Output 0-10 V (dc) Minimum 2500
Power Supply Provided by interconnected tekmarNet Zone Manager
Pump Relay 115 V (ac) 5 A, 1/6 hp
Sensor NTC thermistor, 10k at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
Variable Pump 115 V (ac) 2.5 A, fuse T2.5 A 250 V

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