Phason NVC-DUAL Manual
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Phason NVC-DUAL Manual

Natural ventilation control
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Phason
Natural Ventilation Control
The Natural Ventilation Control (NVC-DUAL) is a fully
programmable controller that provides extensive flexibility
for your curtain or awning control needs. The NVC-
DUAL automatically controls the temperature in a room
by operating up to two curtain machines according to your
programmed settings.
When the temperature is within the
, the NVC-DUAL maintains the curtain
Set point
position.
When the temperature rises above the
NVC-DUAL opens the curtain for the
and then pauses for the
After each
Off duration
temperature and then either opens or closes the curtain
(for the preset duration), depending on the
temperature.
Features
Automatic temperature-based control,
with extended temperature range
-13 to 125°F (-25 to 51.7°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 High and Low temperature
alarms
Four curtain relays (2 x open, 2 x close)
Alarm relay (for external alarm system)
Six-button keypad
33142000
Idle band
Idle band
On duration
.
Off duration
, the NVC-DUAL checks the
of the
, the
,
Four-character LED display
Programming and status LEDs
Manual override/test mode
Power-failure settings protection
Six-foot temperature probe, extendable to
500 feet
Rain Sensor (optional)
Rugged enclosure (corrosion resistant,
water resistant, and fire retardant)
cCSAus approval
Limited warranty (two years)
1

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Summary of Contents for Phason NVC-DUAL

  • Page 1 Phason Natural Ventilation Control The Natural Ventilation Control (NVC-DUAL) is a fully programmable controller that provides extensive flexibility for your curtain or awning control needs. The NVC- DUAL automatically controls the temperature in a room by operating up to two curtain machines according to your programmed settings.

  • Page 2: Main Display

    If you are connecting equipment that exceeds the ratings of the relays, you must install power contactors. For more information, read on page Manual Override Box Becoming familiar with the NVC-DUAL Status LEDs ▪ Show the status of the relays ▪ Show which relay is being controlled Programming LEDs ▪...
  • Page 3 Sensor Enable the optional rain sensor s e n s Installing the NVC-DUAL Read and follow all instructions when installing the NVC-DUAL and connecting  equipment to it. Read on page 2. Do not exceed the electrical ratings of the Electrical ratings ...
  • Page 4 Alarm relay terminal: connect an external alarm system or siren to this terminal. For more information, read Connecting an alarm system on page 6. Input terminal: connect an optional Rain Sensor to this terminal. For more information, read Phason Rain Sensor on page 16.
  • Page 5 Phason Natural Ventilation Control Mounting the NVC-DUAL Select a location for the NVC-DUAL. Make sure you have enough cable and wire to reach the  equipment you want to control. Remove the screws from the front cover and then gently lift it off.

  • Page 6: Connecting The Temperature Probe

    90-degree angle. Replace damaged probes as soon as possible. If there is no probe present or working properly, the NVC-DUAL displays either p d (probe damage) or p s (probe short) and switches off the relays.

  • Page 7: Connecting The Power Source

    3. Place the cover on the control. 4. Switch on the power to the NVC-DUAL; it should display Š Š Š Š for three seconds, the version (for example, v ƒ 0 0 ) for three seconds, and then the temperature.
  • Page 8 Natural Ventilation Control Phason Programming the NVC-DUAL Before you begin programming the NVC-DUAL, make sure the control has power and you have all equipment to the properly connected correct terminals How the curtain settings work There are six curtain settings.
  • Page 9 Phason Natural Ventilation Control To program the Set point Default: 70.0°F, range: –13 to 125 (-25 to 51.7°C) 1. Press until the display shows StP t for the curtain you want to program. Down 2. Press Select The current setting (in degrees) displays and the LED flashes.
  • Page 10 Natural Ventilation Control Phason To program the Close off duration Default: 120 seconds, range: 1 to 900 (up to 15 minutes) 1. Press until the display shows Cof f for the curtain you want to program. Down 2. Press Select The current setting (in seconds) displays and the LED flashes.
  • Page 11 Phason Natural Ventilation Control Alarm messages Message and description Possible cause Possible solution The ambient temperature is too high. Increase ventilation/cooling.  The high temperature alarm setting is Increase the high temperature alarm setting.  too low. For more information, read To program the High temperature alarm High alarm below.

  • Page 12: Changing The Temperature Units

    After 15 minutes with no new rainfall, the NVC-DUAL returns to normal operation. For more information, read on page 16. Phason Rain Sensor If you are installing a Phason Rain Sensor, you must enable the sensor input. By default, the input is not enabled To enable the sensor 1. Press until the display shows sen s and the LED is lit.

  • Page 13: Testing The Alarm

    Down 2. Press Select The display shows te np . 3. Press Select LED flashes and the display shows the test temperature. The NVC-DUAL is now in Test temperature test mode. 4. Press to adjust the test temperature. Down The NVC-DUAL operates the equipment according to the test temperature.

  • Page 14: Restoring The Factory Default Settings

    There is a three-second delay when switching between Open and Close. This is  to allow the motor to stop before switching directions. The NVC-DUAL remains in override mode until you select Auto; it does not  timeout or exit automatically.

  • Page 15: Troubleshooting

    10, and then follow the instructions to resolve the condition. The following table lists some problems, possible causes, and possible solutions. If you are having a problem using the NVC-DUAL, see if the problem is in the following table and then follow the directions for correcting the problem.

  • Page 16: Optional Accessories And Kits

    The Phason Rain Sensor's durable and rugged enclosure is completely sealed, so there are no electronics to corrode, and no openings for debris to collect.

  • Page 17: Electrical Ratings

    Place the operation mode switch in the MANUAL position to control the motor using the  manual override (OPEN/CLOSE) switch. Place the switch in the AUTO position to control the motor using the NVC-DUAL, or third-  party automatic control system.
  • Page 18 Natural Ventilation Control Phason Temperature probes and extension cable Temperature probes monitor temperatures ranging from –49 to 122°F (-45 to 50°C). The probes are available in 1, 6, 30, 75, or 150-foot cable lengths and can extended up to 500 feet using extension cable.
  • Page 19 Phason Natural Ventilation Control 33142000...

  • Page 20: Limited Warranty

    Phason Limited warranty This warranty applies only to the Natural Ventilation Control (NVC-DUAL). If you need warranty service, return the product and original proof of purchase to your dealer. Phason Inc. (Phason) warrants the NVC-DUAL subject to the following terms and conditions.

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