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Phason
Natur
ral Vent
tilation
The Natu
ural Ventilatio
on Control (N
flexibility
y for your cur
rtain or awni
temperatu
ure in a room
m by operatin
settings.
Controllin
ng a curtain
machine
When
n the temper
ature is withi
NVC
-2 maintains
When
n the temper
ature rises ab
opens
s the curtain
for the
duratio
on
.
After
r each
Off dura
ation
then e
either opens
or closes the
depen
nding on the
Controllin
ng a heater
When
n the temper
ature is below
switch
hes the heate
er on.
When
n the temper
ature is abov
switch
hes the heate
er off.
Quick
k reference
e
Accesso
ories and kits
s ........... 21
Alarm c
connection ....
.............. 7
Alarm s
ettings overv
iew ...... 13
Close d
duration.........
............ 11
Close o
off (idle) durat
ion ...... 11
Control
layout .........
.............. 5
Control
overview .....
.............. 3
Curtain
machine con
nnection . 6
Curtain
set point ......
............ 10
Curtain
settings over
rview ...... 9
Factory
y defaults ......
............ 18
33140002
2
Contro
NVC-2) is a
ng control n
ng a curtain m
in the
Idle ba
the curtain p
position.
bove the
Idle
On d
uration
, and t
, the NV
VC-2 checks t
e curtain (for
temperature
e.
Heat se
w the
Heat se
ve the
Features .....
Firmware ve
Heater conn
Heater set p
High alarm .
Hysteresis ..
Idle band....
Low alarm ..
Manual ove
Menu ..........
Mounting ...
l
fully program
mmable cont
eeds. The NV
VC-2 autom
machine and
heater accor
nd
of the
Set
t point
, the
band
, the NV
VC-2
then pauses f
for the
Off
the temperat
ture and
r the preset d
duration),
et point
, the N
NVC-2
et point
, the N
NVC-2
......................
.......... 2
ersion ............
........ 19
nection ..........
.......... 6
point ..............
........ 12
......................
........ 14
......................
........ 12
......................
........ 11
......................
........ 14
rride mode ...
........ 16
......................
.......... 4
......................
.......... 6
troller that pr
rovides exten
atically contr
rols the
rding to your
r programme
O
Open duration
n ...................
O
Open off (idle)
) duration ....
P
Power connec
ction .............
R
Rain sensor ...
.....................
R
Ratings ..........
.....................
T
Temperature p
probe ...........
T
Temperature t
test mode ....
T
Temperature u
units .............
T
Troubleshooti
ng ................
nsive
ed
.. 10
.. 11
.... 8
.. 14
.... 2
.... 7
.. 15
.. 14
.. 21
1
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Summary of Contents for Phason Natural Ventilation Control
- Page 1 Phason Natur ral Vent tilation Contro The Natu ural Ventilatio on Control (N NVC-2) is a fully program mmable cont troller that pr rovides exten nsive flexibility y for your cur rtain or awni ng control n eeds. The NV...
- Page 2 Natural Ventilation Control Phason Features Automatic temperature-based control, Four-button keypad with extended temperature range Four-character LED display -13 to 125°F (-25 to 51.7°C) Programming and status LEDs Programmable On and Off durations for Manual override/test mode the open and close relays ...
- Page 3 Phason Natural Ventilation Control Becoming familiar with the NVC-2 Status LEDs Alarm LED ▪ Show the status of the relays ▪ Shows when there is an alarm condition ▪ Show which relay is being Test LED ▪ Shows when test mode is active...
- Page 4 Natural Ventilation Control Phason Main menu When you are in the main menu, the display shows the menu items; the LEDs light up to show you which menu item is selected. Press to move through the menu items. Down Menu item...
- Page 5 Alarm relay terminal: connect an external alarm system or siren to this terminal. For more information, read Connecting an alarm system on page 7. Input terminal: connect an optional Rain Sensor to this terminal. For more information, read Phason Rain Sensor on page 21.
- Page 6 Natural Ventilation Control Phason Mounting the NVC-2 Select a location for the NVC-2. 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 7 Phason Natural Ventilation Control Connecting the temperature probe Follow the guidelines below when installing and connecting the temperature probe. TEMP Do not run the probe cable in the same conduit as AC power cables Do not run the sensor cable beside AC power cables or near electrical equipment.
- Page 8 Natural Ventilation Control Phason If you are connecting the alarm system to a Normally closed system (open on alarm) network of controls and your system uses a CONTROL CONTROL normally closed connection (opens on alarm), connect the system as shown in the normally closed diagram.
- Page 9 Phason Natural Ventilation Control Programming the NVC-2 Before you begin programming the NVC-2, make sure the control has power and you have properly connected all equipment to the correct terminals. How the curtain settings work There are six curtain settings.
- Page 10 Natural Ventilation Control Phason Time (seconds) Open off duration: 120 seconds After the curtain opens for the it holds its position for the Open on duration: 30 seconds If the temperature rises above the the curtain opens for the Idle band: 4° (+/– 2°F) Set point (80°F)
- Page 11 Phason Natural Ventilation Control To program the Open off duration Default: 180 seconds, range: 1 to 900 (up to 15 minutes) until the display shows 0 o f f . 1. Press Down 2. Press Select Off duration The current setting (in seconds) displays and the LED flashes.
- Page 12 Natural Ventilation Control Phason How the heater settings work Heat set point When the temperature is below the , the NVC-2 switches the heater on. When the Heat set point Hysteresis temperature is above the plus the , the NVC-2 switches the heater off.
- Page 13 Phason Natural Ventilation Control Alarm settings and conditions When there is an alarm condition, the alarm relay activates and the Alarm LED flashes. The display alternates between the ambient temperature and the alarm message. When the condition goes away, the alarm relay deactivates and the Alarm LED switches off. The display continues to alternate between the temperature and alarm message until you acknowledge the alarm.
- Page 14 Back Enabling the optional rain sensor With the optional Phason Rain Sensor installed, the NVC-2 automatically the curtain when rainfall is detected. When the sensor detects rain, it sends a signal to the NVC-2. When the NVC-2 receives the signal, it completely closes the curtain, bypassing the on and off durations. After 15 minutes with no new rainfall, the NVC-2 returns to normal operation.
- Page 15 Phason Natural Ventilation Control 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 until the display shows s e n s and the 1. Press Sensor LED is lit.
- Page 16 Natural Ventilation Control Phason Testing the alarm You can manually switch the alarm relay on and off so that you can test your alarm system. To test the alarm until the display shows a L a r . 1. Press Down 2.
- Page 17 Phason Natural Ventilation Control 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-2 remains in override mode until you exit; it does not timeout or exit automatically.
- Page 18 Natural Ventilation Control Phason Restoring the factory default settings Setting Default Range/options Set point 70.0 -13 to 125°F (-25 to 51.7°C) Open ON duration 1 to 900 seconds Open OFF duration 1 to 900 seconds Close ON duration 1 to 900 seconds...
- Page 19 Back Updating the firmware At Phason, we constantly improve and add new features to our products. You can the firmware in your NVC-2 as these improvements become available; all you need is a USB memory stick and a firmware update file.
- Page 20 Natural Ventilation Control Phason To update the firmware using the POWER ON method 1. Loosen the four cover screws and gently remove the cover from the control. Make sure not to disconnect the ribbon cable from the base; it must stay properly connected.
- Page 21 Connecting an alarm system on page 7. Optional accessories and kits Phason Rain Sensor The Phason Rain Sensor (model PRS) connects to the NVC-2 and allows it to close the curtain when rainfall is detected. When the sensor detects rain, it sends a signal to the NVC- 2.
- Page 22 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 23 Phason Natural Ventilation Control Parts and kits If the display fails, you can replace it with a display kit. After replacing the display, you will need to program the control. If the bottom circuit board fails, you can replace it with a control kit.
- Page 24 Phason Limited warranty This warranty applies only to the Natural Ventilation Control (NVC-2). If you need warranty service, return the product and original proof of purchase to your dealer. Phason Inc. (Phason) warrants the NVC-2 subject to the following terms and conditions.
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