This 12-Volt DC-powered Phason Natural Ventilation Control (NVC-2-12) automatically controls the temperature in a room by operating a curtain machine and heater or furnace according to your programmed settings.

Controlling a Curtain Machine

• When the temperature is within the idle band, the NVC-2-12 maintains the curtain position
• When the temperature rises above the idle band, the NVC-2-12 opens the curtain for the on duration & then pauses for the off duration
• After each off duration, the NVC-2-12 checks the temperature and then either opens or closes the curtain, depending on the temperature

Controlling a Heater or Furnace

• When the temperature is below the heat set point, the NVC-2-12 switches the heater on; when it is above the set point, the NVC-2-12 switches the heater off

Features

• Automatic temperature-based control, with extended range; -13 to 125°F (-25 to 51.7°C)
• Programmable On and Off durations for the open & close relays; 1-900 seconds (up to 15 minutes)
• Programmable Idle band; 1.0 to 10.0°F (0.6 to 5.5°C)
• Programmable heater Hysteresis; 0.3 to 5.0°F (0.2 to 2.8°C)
• Programmable High hand Low-temperature alarms
• 2 curtain relays (1 open, 1 close)
• Heater control relay
• Alarm relay (for external alarm system)
• 4-button keypad
• 4-digit LED display
• Programming & status LEDs
• Manual override & test modes
• Power-failure settings protection
• 6' temperature probe, extendable to 500'
• Optional Rain Sensor
• Rugged enclosure (corrosion-resistant, water-resistant & fire retardant)
• cCSAus approval

Electrical Ratings

• Input
  • 12 VDC, 50/60 Hz
• Open/Close/Heat Relays
  • 12 A at 30 VDC
• Alarm Relay
  • 2 A at 30 VDC, resistive load
  • 1 A at 30 VDC, inductive load