Control 12 and 24-volt curtain machines and heaters
The Natural Ventilation Control automatically controls the temperature in a room by operating a curtain machine and heater or furnace according to your programmed settings.
With 12 and 24 VDC models available, the NVC is the perfect solution for off-grid, battery-powered installations that use solar or wind power.
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
Range: -13 to 125°F (-25 to 51°C) - Programmable On and Off durations for the open and close relays
1 to 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 and Low temperature alarms
- Two curtain relays (one open, one close)
- Heater control relay
- Alarm relay (for external alarm system)
- Four-button keypad
- Four-digit LED display
- Programming and status LEDs
- Manual override and test modes
- Power-failure settings protection
- Six-foot temperature sensor, extendable to 500 feet
- Optional rain sensor
- NEMA 4X enclosure (Corrosion-resistant, water-resistant, and fire-retardant)
- 2 year warranty
