Description

Tekmar 402 TEKNET – tN2 House Control – Boiler – DHW & Setpoint – Mixing – Four Zone Valves

Features:

• DHW priority (optional), setpoint operation
• Exercising, Boiler Protection
• DHW post purge, DHW control
• Outdoor temperature reset, indoor temperature feedback
• Expandable up to 48 zones, single on/off, two stage, or modulating boiler control
• Variable speed, floating action, or proportional mixing control, automatic boiler differential
• Warm weather shut down, zone synchronization
• Only requires 2 Wires Per Zone, Four 24 V (ac) powered zone outputs
• For use with tekmarNet^® 2 thermostats only, tN4 expansion terminals

Specifications: 

• Agency Approvals	CSA C US, meets class B: ICES & FCC Part 15
  Ambient Conditions	Indoor use only, 32 to 104 degrees F (0 to 40 degrees C), RH less than or equal to 90 percent Non-condensing
  Boiler Stage1 Stage2 Relay	24 V (ac) 5 A
  Calls	Setpoint and DHW calls, Short, 0 – 32 V (ac)
  Control Load	2 VA
  Control Type	Microprocessor control, this is not a safety (limit) control
  Dimensions	5.5″ H x 5.5″ W x 2.25″ D (140 x 140 x 57 mm)
  Enclosure Material	Blue PC+ABS plastic
  Enclosure NEMA Rating	NEMA 1
  Hydronic – HVAC Control Type	tN2 House Control
  Modulating Output	Boiler modulation 0 – 10 V (dc) 500 ohms min load impedance, 4 – 20 mA 1 k ohms max load impedance
  Power Supply	24 V (ac) plus / minus 10 percent, 60 Hz, 100 VA max, Class 2
  Pump Power	115 V (ac) 12 A max
  Pump Relay	115 V (ac) 5 A, 1/6 hp
  Sensor	NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892
  Variable Pump	115 V (ac) 2.4 A
  Zone Valve – Floating Action Load	89 VA, 24 V (ac), 3.7 A for zones 1 to 4 plus floating action output

Installation Manual