Phason's Natural Ventilation Control (NVC-2) 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 maintains the curtain position
• When the temperature rises above the idle band, the NVC-2 opens the curtain for the on duration and then pauses for the off duration
• After each off duration, the NVC-2 checks the temperature and then either opens or closes the curtain, depending on the temperature

Controlling a Heater:

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

Features:

• Automatic temperature-based control, -13° F to 125° F
• Programmable On and Off durations for the open and close relays
  • 1-900 seconds
• Programmable idle band
  • 1.0° F to 10.0°F
• Programmable heater hysteresis
  • 0.3° F to 5.0°F
• Programmable temperature alarms
• 2 curtain relays (1 open, 1 close)
• Heater control relay
• Alarm relay (for external alarm system)
• 4-button keypad
• 4-character LED display
• Programming and status LEDs
• Manual override/test mode
• Power-failure settings protection
• 6' temperature probe, extendable to 500'
• Optional Rain Sensor
• Rugged enclosure (corrosion resistant, water resistant, and fire retardant)
• cCSAus approval
• 2 year limited manufacturer warranty

Electrical Ratings:

• Input: 85 to 264 VAC, 50/60 Hz
• Open/Close/Heat Relays
  • 15 A at 120/230 VAC, resistive load
  • 1/2 HP at 120 VAC, 1 HP at 230 VAC
• Alarm Relay
  • 0.4 A at 125 VAC, 2.0 A at 30 VDC, resistive load
  • 0.2 A at 125 VAC, 1.0 A at 30 VDC, inductive load