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view ...... 9
the
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Low alarm .
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Factor
defaults ......
3344000
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power
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install pow
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on page 2
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2
2014
04-10
Phason Natural Ventilation Control
Becoming familiar with the NVC
Status LEDs
▪ Show the status of the relays
▪ Show which relay is being
controlled
Programming LEDs
▪ Show which setting is being
displayed or programmed
Down
▪ Scroll down
▪ Decrease a value
Up
▪ Scroll up
▪ Increase a value
Alarm LED
▪ Shows when there is an alarm condition
Test LED
▪ Shows when test mode is active
Version LED
▪ Shows the firmware version
Programming LEDs
▪ Show which setting is being
displayed or programmed
Select
▪ Select an option
▪ Accept a value
Back
▪ Go back
▪ Cancel changes
Main display
The main display shows the temperature and any alarm messages. The main display is what you see
when you are not in a menu or settings display.
Here are some things to know about the main display.
When a relay is on, the status LED for that relay is lit.
When there is an alarm condition, the display flashes between the alarm message and the current
temperature. For more information about alarms, read Alarm settings and conditions on page
13.
When the control is in manual override mode:
For the curtain, the Open and Close LEDs will blink three times and then stay off for one
second.
For the heater, if the heater is ON, the Heat LED will blink three times and then stay ON
for one second; if the heater is OFF, the LED will blink three times and then stay OFF for
one second.
For more information, read Using manual override mode on page 16
33440000 3
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Change betw
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2. Do not e
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ter set point
h alarm tempe
alarm temper
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4
2014
04-10
Phason
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3344000
n and close r
necting a curt
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perature pro
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ut terminal: co
page 21.
connection:
Updating the
lay terminals:
in machine o
inal: connect a
or electric he
l: connect the
ore informati
e terminal: co
ge 7.
: make sure th
al: connect a
rm system on
nnect an optio
onnect a USB
firmware on p
connect a curt
page 6.
heate
or furn
ter on page 6.
attery cable to
n, read Conne
nect the temp
ribbon cable f
external alarm
page 7.
al Rain Sensor
emory stick t
ge 19.
in machine to
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this terminal.
ting the powe
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source on pa
this terminal.
is properly co
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r to update the
. For more info
formation, rea
el will be 12 or
e 8.
or more infor
nected.
l. For more inf
rmation, read
firmware. For
mation, read
Connecting a
24 VDC, depe
ation, read
ormation, read
hason Rain S
ore informatio
ding
nsor
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5
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entilation
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Ph
ason
Mounti
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6
2014
04-10
Phason Natural Ventilation Control
Connecting the temperature probe
Follow the guidelines below when installing and connecting the temperature probe.
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.
When crossing other cables or power lines, cross
them at a 90-degree angle.
Replace damaged probes as soon as possible. If there is no probe present or
working properly, the NVC displays either pd (probe damage) or ps (probe short)
and switches off the relays.
Connecting an alarm system
An alarm system can be a siren, an alarm panel, or an auto-dialer. See your alarm siren’s installation
guide for installation instructions and information about the type of system:
The descriptions for the alarm terminal are as follows: CC–common connection, CA–closed on
alarm, OA–open on alarm.
To connect an alarm system
If you are connecting the alarm system to a
Normally open system (closed on alarm)
network of controls and your system uses a
normally open connection (closes on alarm),
connect the system as shown in the normally open
diagram.
Join all the common (CC) connections together
and all the closed-on-alarm (CA) connections
together. The NVC alarm relays must be in parallel
with each other so any control can trigger the
alarm system when an alarm condition occurs.
33440000 7
Natural Ventilation Control Phason
If you are connecting the alarm system to a
network of controls and your system uses a
normally closed connection (opens on alarm),
connect the system as shown in the normally
closed diagram.
Join the alarm relays in a continuous loop. The
NVC alarm relays must be in series with each other
so any control can trigger the alarm system when
an alarm condition occurs.
Connecting the power source
DC model NVC-2-12
DC model NVC-2-24 (24 VDC, 125 mA)
Before connecting the incoming
power, switch OFF the power at the
source.
Do not switch ON the power until
you have finished all wiring and
verified all equipment is properly
connected and free of obstructions.
(12 VDC, 250 mA)
Normally closed system (open on alarm)
Finishing the installation
1. Make sure all wires are properly connected to the correct terminals.
2. Place the cover on the control.
3. Switch on the power to the NVC; it should display
example,
If the display does not light up, go back to step 1.
If the display shows an alarm message, or the LED for Alarm is flashing, press Select to
vƒ00
) for three seconds, and then the temperature.
ŠŠŠŠ
for three seconds, the version (for
acknowledge the alarm. For a list of alarm messages and error codes, read Alarm messages
on page 13.
4. Test the equipment. For more information, read Testing and maintaining the NVC on page 15
5. Fasten the cover to the base.
8 2014-04-10
Phason Natural Ventilation Control
Programming the NVC
Before you begin programming the NVC, make sure the control has power and you have
connected
all equipment to the
correct terminals
.
properly
How the curtain settings work
There are six curtain settings.
Set point – the temperature at which the curtain holds its position.
Idle band – the buffer around the set point within which the curtain holds its position.
Open on duration – the duration the curtain opens during the open cycle
Close on duration – the duration the curtain closes during the close cycle
Open off duration – the duration the curtain holds its position during the open cycle
Close off duration – the duration the curtain holds its position during the close cycle
Curtains hold their position while the temperature is within the Idle band of the Set point. For
example, if the Set point is 80°F and the Idle band is 4°F (+/- 2°), the curtain holds its position
when the temperature is between 78°F and 82°F.
If the temperature rises above the Idle band (above 82°F in our example), the curtain opens for the
Open on duration. After opening, the curtain holds its position for the Open off duration. If the
temperature is still above the Idle band, the curtain again opens for the Open on duration, and the
process repeats.
If the temperature drops below the Idle band (below 78°F in our example), the curtain closes for the
Close on duration
temperature is still below the
. After closing, the curtain holds its position for the Close off duration. If the
Idle band, the curtain again closes for the Close on duration, and the
process repeats.
33440000 9
Natural Ventilation Control Phason
t
t
t
Time (seconds)
Set point (80°F)
Temperature
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 ,
he curtain opens for the .
Idle band: 4° (+/–2°F)
When the temperature is within the
he curtain remains in its current position.
Close off duration: 150 seconds
After the curtain closes for the
holds its position for the
Close on duration: 60 seconds
If the temperature falls below the
he curtain closes for the .
, it
,
.
,
.
,
To program the Set point
Default: 70.0°F, range: –13 to 125 (-25 to 51.7°C)
1. Press Down until the display shows
StPt
.
2. Press Select.
The current setting (in degrees) displays and the Set point LED flashes.
3. Press
Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
StPt
.
4. Press Down to move to the Open on duration, or Back to cancel and return to the main display.
To program the Open on duration
Default: 20 seconds, range: 1 to 900 (up to 15 minutes)
1. Press Up or Down until the display shows
0 on
.
2. Press Select.
The current setting (in seconds) displays and the On duration LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
0 on
.
4. Press Down to move to the Open off duration, or Back to cancel and return to the main display.
10 2014-04-10
Phason Natural Ventilation Control
To program the Open off duration
Default: 180 seconds, range: 1 to 900 (up to 15 minutes)
1. Press Up or Down until the display shows
0off
.
2. Press Select.
The current setting (in seconds) displays and the Off duration LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
0off
.
4. Press Down to move to the Close on duration, or Back to cancel and return to the main display.
To program the Close on duration
Default: 30 seconds, range: 1 to 900 (up to 15 minutes)
1. Press
Up or Down until the display shows
C on
.
2. Press Select.
The current setting (in seconds) displays and the On duration LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
C on
.
4. Press Down to move to the Close off duration, or Back to cancel and return to the main display.
To program the Close off duration
Default: 120 seconds, range: 1 to 900 (up to 15 minutes)
1. Press Up or Down until the display shows
Coff
.
2. Press Select.
The current setting (in seconds) displays and the
Off duration LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
Coff
.
4. Press Down to move to the Idle band, or Back to cancel and return to the main display.
To program the Idle band
Default: 2.0°F, range: 1.0 to 10.0°F (0.6 to 5.5°C)
1. Press Up or Down until the display shows
band
.
2. Press Select.
The current setting (in degrees) displays and the Idle band LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
band
.
4. Press Down to move to the Heat set point, or Back to cancel and return to the main display.
33440000 11
Natural Ventilation Control Phason
How the heater settings work
When the temperature is below the Heat set point, the NVC switches the heater on. When the
temperature is above the Heat set point plus the Hysteresis, the NVC switches the heater off.
For more information about hysteresis and how it affects operation, read
below.
To program the Heat set point
Default: 75.0°F, range: -13 to 124°F (-25 to 51.1°C)
1. Press Up or Down until the display shows
2. Press
Select.
Heat
.
The current setting (in degrees) displays and the Heat set point LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
4. Press
Down to move to the High alarm, or Back to cancel and return to the main display.
Heat
.
How hysteresis works
Example for heaters
Hysteresis is the number of degrees above the set point
that a heating stage or relay switches off.
For example, a household thermostat might switch on a
Set point+
hysteresis: 70°F
Hysteresis: 3°F
furnace at 67°F when the house is cooling down, but
switch it off at 70°F when the house is warming up. The
Set point: 67°F
difference between these two values is the hysteresis.
How hysteresis works
Heater OFF
To program the Hysteresis
Default: 2.0°F, range: 0.5 to 5°F (0.3 to 2.8°C)
1. Press Up or Down until the display shows
Hyst
.
2. Press Select.
The current setting (in degrees) displays and the Hysteresis LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
Hyst
.
4. Press Down to move to Units, or Back to cancel and return to the main display.
12 2014-04-10
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. To acknowledge an alarm, press Select.
There are four alarm conditions.
High temperature: is when the temperature is above the high temperature alarm setting. You can
adjust the high temperature alarm from the Low alarm value to 125°F (51.7°C).
Low temperature: is when the temperature is below the low temperature alarm setting. You can
adjust the low temperature alarm from -13°F (-25°C) to the High alarm value.
Probe short: is when the temperature probe is shorted (the temperature circuit is closed).
Probe damage: is when the temperature probe is missing or broken (the temperature circuit is
open).
When there is a probe damage or probe short condition, the control switches all
relays off.
Alarm messages
Message and description Possible cause Possible solution
Hi
High temperature alarm
Lo
Low temperature alarm
pd
Probe damage alarm
ps
Probe short alarm
The ambient temperature is too high.
The high temperature alarm setting is
too low.
The ambient temperature is too low.
The low temperature alarm setting is
too high.
The temperature probe is damaged,
missing, or the connecting wire is
broken. The temperature probe
circuit is open.
The temperature probe is damaged.
The temperature probe circuit is
closed.
Increase ventilation/cooling.
Increase the high temperature alarm setting.
For more information, read To program the
High alarm on page 14.
Decrease ventilation/cooling, increase heating.
Decrease the low temperature alarm setting.
For more information, read To program the
Low alarm on page 14.
Check the wire between the control and the
probe. Wire damage can cause the alarm.
Replace or reconnect the temperature probe.
The control should recover automatically.
Check the wire between the control and the
probe. Wire damage can cause the alarm.
Replace the temperature probe. The control
should recover automatically.
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Natural Ventilation Control Phason
To program the High alarm
Default: 95.0°F, range: Low alarm to 125°F (51.7°C), or OFF
1. Press Up or Down until the display shows
HiaL
.
2. Press Select.
The current setting (in degrees) displays and the High alarm LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
HiaL
.
4. Press Down to move to the Low alarm, or Back to cancel and return to the main display.
To program the Low alarm
Default: 50.0°F, range: -13°F (-25°C) to High alarm, or OFF
1. Press
Up or Down until the display shows
LoaL
.
2. Press Select.
The current setting (in degrees) displays and the Low alarm LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
LoaL
.
4. Press Down to move to the Hysteresis, or Back to cancel and return to the main display.
Changing the temperature units
The NVC can display temperatures in Fahrenheit or Celsius. The default is Fahrenheit.
To change the Units
1. Press Up or Down until the display shows
Unit
.
2. Press Select.
The current setting (°F or °C) displays and the Units LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
Unit
.
4. Press Down to move to Sensor, or Back to cancel and return to the main display.
Enabling the optional rain sensor
With the optional Phason Rain Sensor installed, the NVC automatically the curtain when rainfall is
detected. When the sensor detects rain, it sends a signal to the NVC. When the NVC receives the
signal, it completely closes the curtain, bypassing the on and off durations. After 15 minutes with no
new rainfall, the NVC returns to normal operation.
For more information, read Phason Rain Sensor on page 21.
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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
1. Press Up or Down until the display shows
sens
and the Sensor LED is lit.
2. Press Select.
The current setting (on or off) displays and the Sensor LED flashes.
3. Press Up or Down to adjust the setting and then press Select.
The change is saved and the display shows
sens
.
4. Press Back to return to the main display.
Testing and maintaining the NVC
Using temperature test mode
Temperature test mode allows you to test your equipment and settings by simulating the
temperature. In temperature test mode, you adjust the “test temperature”.
As you increase or decrease the test temperature, the relays operate according to their settings and
the test temperature. This gives you an idea of how your system performs over a full range of
temperatures. The relays remain operating according to the test temperature until you exit test mode.
When the NVC is in temperature test mode, it operates the equipment according
to the test temperature, not according to the measured temperature.
The NVC does not exit test mode automatically. When you are finished testing,
press
Back or Select to exit test mode.
To use temperature test mode
1. Press Up or Down until the display shows
test
.
2. Press Select.
The display shows
tenp
.
3. Press Select.
The Tes t LED flashes and the display shows the test temperature. The NVC is now in
temperature test mode.
4. Press Up or Down to adjust the test temperature.
The NVC operates the equipment according to the test temperature.
5. When finished, press
Back to return the control to automatic mode. Press Back again to return
to the main display.
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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
1. Press Up or Down until the display shows
aLar
.
2. Press Select.
The display shows
(off) and the Alarm LED flashes.
off
3. Press Up or Down to change the relay state.
4. When finished, press Back to return to the main menu. Press Back again to return to the main
display.
Using manual override mode
Manual override mode allows you to override the automatic settings and manually control the
curtain and/or heater. You can open, close, or pause the curtain, and switch the heater on or off.
Manual mode is also useful for testing equipment.
When the main display is showing and the curtain or heater is in override mode:
For the curtain, the Open and Close LEDs will blink three times and then stay off for one
second.
For the heater, if the heater is ON, the Heat LED will blink three times and then stay ON for
one second; if the heater is OFF, the LED will blink three times and then stay OFF for one
second.
To override the curtain
1. Press Up or Down until the display shows
Curt
.
2. Press Select.
The
Open
and
Close
LEDs blink rapidly.
If you are in automatic mode, the display shows
If you are in override mode, the display shows
3. Press Up or Down until
Ovrd
(override) displays.
Auto
Ovrd
.
.
4. Press Select.
The display shows
idLe
5. Press Down to switch between idle/stop and
and
cLos
(close). Each time you press the button the curtain starts or stops moving.
(idle).
open
(open), or press Up to switch between idle
6. Press Select.
The control returns to the main menu and the display shows
Curt
.
7. Press Up or Down to select a different menu item, or press Back to return the main display.
16 2014-04-10
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 remains in override mode until you exit; it does not timeout or exit
automatically.
To exit manual mode
1. Press Up or Down until the display shows the item you want (
heater).
2. Press Select.
The relay LED(s) blink rapidly and the display shows
3. Press
Up or Down until the display shows
Auto
Ovrd
.
4. Press Select.
The display shows
5. Press
Up or Down to select a different menu item, or press Back to return the main display.
Curt
or
heat
, depending which item you chose in step 1.
To override the heater
1. Press Up or Down until the display shows
Heat
.
2. Press Select.
The Heat LED blinks rapidly.
If you are in automatic mode, the display shows
If you are in override mode, the display shows
3. Press Up or Down until the display shows
Ovrd
Auto
Ovrd
.
.
.
4. Press Select.
The display shows on (on).
Curt
.
for curtain or
heat
for
5. Press
Up or Down to switch between
on
and
off
(off).
6. Press Select.
The control returns to the main menu and the display shows
7. Press
Up or Down to select a different menu item, or press Back to return the main display.
Curt
.
33440000 17
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 20 1 to 900 seconds
Open OFF duration 180 1 to 900 seconds
Close ON duration 30 1 to 900 seconds
Close OFF duration 120 1 to 900 seconds
Idle band 2.0 1.0 to 10.0°F (0.6 to 5.5°C)
Heat set point 75.0 -13 to 125°F (-25 to 51.7°C)
Low alarm 50.0 -13°F (-25°C) to High alarm
High alarm 95.0 Low alarm to 125°F (51.7°C)
Hysteresis 2.0 0.5 to 5°F (0.3 to 2.8°C)
Units °F °F/°C
Sensor Off Off/On
You can restore the default settings using one of two methods: the
off
method. The
reason, the power on method does not work, use the
power on
method is the easiest way to restore the factory defaults. If, for some
power off
power on
method.
method or the
power
To restore the factory defaults using the POWER ON method
1. Press Up or Down until the display shows
test
.
2. Press Select.
The display shows
tenp
3. Press Up or Down until the display shows
.
faCt
.
4. Press Select.
The Tes t LED flashes and the display shows no.
5. Press Up or Down to until the display shows
yes
.
6. Press Select to restore the factory defaults.
The control resets, displays the version for a few seconds, and then displays the temperature.
To restore the factory defaults using the POWER OFF method
We recommend having someone assist you if using the power off method.
1. Switch off the power to the control.
2. Switch on the power to the control while holding the Up and Down buttons. Keep holding the
buttons until
›œf
displays.
3. Release the buttons.
The control resets, displays the version for a few seconds, and then displays the temperature.
18 2014-04-10
Phason Natural Ventilation Control
Displaying the firmware version
Firmware is the internal programming instructions of the NVC. It is much like an operating system
or software on a computer. Just like an operating system, the firmware has a version. If you call
technical support, the support agent might ask you for the firmware version.
To display the firmware version
1. Press Up or Down until the display shows
Ver
.
2. Press Select.
The display shows
dISP
.
3. Press Select.
The display shows the firmware version and the
Version LED flashes.
4. Press Back twice to return to the main display.
Updating the firmware
At Phason, we constantly improve and add new features to our products. You can the firmware in
your NVC as these improvements become available; all you need is a USB memory stick and a
firmware update file.
You can update the firmware using one of two methods: the
method. The
power on
power on
method is the easiest way to update the firmware. If, for some reason, the
method does not work, use the power off method.
power on
method or the
power off
Getting a file
You can get a firmware update file from the Phason support forum at www.forum.phason.ca or the
Phason website at www.phason.ca.
You need to copy the file to a USB memory stick (USB drive). The USB drive must be formatted as
a FAT32 file system. To check if the USB drive is the correct format, insert it into your computer
and then open Windows Explorer.
1. Right-click the USB drive.
2. Click Properties.
3. Make sure the file system is FAT32.
If the file system is not correct, you will need
to format the drive as FAT32, or use a
different drive that is the correct format.
4. Copy the update file to the root of the USB
drive. The
folder
root
of the drive means
not in a
.
33440000 19
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.
2. Insert the USB drive into the connector on the back of the cover.
3. Press Up or Down until the display shows
Ver
.
4. Press Select.
The display shows
diSP
5. Press Up or Down until the display shows
.
UPdt
.
6. Press Select.
The display shows no and the Version LED blinks.
7. Press Up or Down until the display shows
yes
.
8. Press and hold Select until the Te s t LED blinks rapidly.
9. Release the button.
While the Te s t LED is blinking rapidly, the firmware is updating.
Updating can take up to 2 minutes.
After updating, the display shows
ŠŠŠŠ
for a few seconds,
followed by the version number, and then the main temperature
display.
10. When finished, remove the USB drive, verify the ribbon cable is
properly connected, and then fasten the cover to the base.
To update the firmware using the POWER OFF method
We recommend having someone assist you if using the power off method.
1. Switch off the power to the control.
2. 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.
3. Insert the USB drive into the connector on the back of the cover.
4. Switch on the power to the control while holding the Select button. Keep holding the button
until the Te s t LED blinks rapidly.
5. Release the button.
While the Te s t LED is blinking rapidly, the firmware is updating. Updating can take up to 2
minutes.
After updating, the display shows
ŠŠŠŠ
for a few seconds, followed by the version number,
and then the main temperature display.
6. When finished, remove the USB drive, verify the ribbon cable is properly connected, and then
fasten the cover to the base.
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Phason Natural Ventilation Control
Troubleshooting
If you see an error code and are not sure what it means, look it up in Alarm settings and conditions
on page 13, 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, see if the problem is in the following table and then follow the directions
for correcting the problem.
Problem Possible cause Possible solution
The power supply components
are blown, or there are burn
marks on boards and
components.
Motors and fans slow down or
stop.
There is no power/display. A circuit breaker at service panel is off
The display shows unusually
high or low temperature.
The curtain opens when it
should close, or closes when it
should open
The alarm relay is not operating
the alarm system.
There has been a power surge,
brownout, or power outage.
or tripped.
The incoming power wiring is
incorrect.
The probe is not a Phason probe. Remove the probe and then install a Phason
The extension cable connected to the
temperature probe is providing a poor
connection
The temperature probe is damaged. Replace the probe.
The wiring is incorrect; the close and
open wires are reversed.
The alarm wiring is incorrect. Correct the wiring. For more information, read
Avoid the problem in future by providing
proper voltage and protection for the control.
Reset the circuit breaker.
Correct the wiring.
probe.
Check the extension cable connection and re-
solder it if necessary.
Correct the wiring. For more information, read
Connecting a curtain machine on page 6.
Connecting an alarm system on page 7.
Optional accessories and kits
Phason Rain Sensor
The Phason Rain Sensor (model PRS) connects to the NVC
and allows it to close the curtain when rainfall is detected.
When the sensor detects rain, it sends a signal to the NVC.
When the NVC receives the signal, it completely closes the
curtain, bypassing the on and off durations. After 15
minutes with no rain, the control returns to normal
operation.
33440000 21
Natural Ventilation Control Phason
The advanced optical sensor uses infrared light to detect water hitting its surface. This method of
detection is more sensitive and reliable than other methods, is nearly immune to false detection, and
is not affected by movement and most environmental conditions.
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.
Power contactors
Phason’s 240-volt power contactors are heavy-duty relays that increase the load handling capability
of control relays. Power contactors are ideal for electric heaters.
Power contactor relay (model PC-240): includes
power contactor relay and mounting hardware for easy
mounting in an enclosure.
Power contactor kit (model 122-1): includes power
contactor relay, on-off-auto switch and label, snubber
filter (reduces electrical noise), and mounting hardware
for easy mounting in an enclosure.
Power contactor unit (model 129-0): includes two
power contactor relays, two on-off-auto switches, and
two snubber filters, mounted in a large enclosure. The
enclosure has room for two additional contactor relays or
kits.
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.
Extension cable is available in 500-foot lengths.
Features
Easy installation
Rugged and durable design
Weather and UV-resistant cable
Limited warranty (90 days)
22 2014-04-10
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.
Model NVC-2-12
Display kit model K331003
Control kit model KNVC12-CONTROL
Model NVC-2-24
Display kit model KNVC24-DISPLAY
Control kit model KNVC24-CONTROL
33440000 23
Natural Ventilation Control Phason
Limited warranty
This warranty applies only to the Natural Ventilation Control (NVC). If you need warranty
service, return the product and original proof of purchase to your dealer.
Phason Inc. (Phason) warrants the NVC subject to the following terms and conditions.
This warranty is valid only to the original purchaser of the product, for two years from the
manufacturing date. The manufacturing date is stated in the first eight digits of the serial number
in the form year-month-day.
Phason hereby warrants that should the NVC fail because of improper workmanship, Phason
will repair the unit, effecting all necessary parts replacements without charge for either parts or
labor.
Conditions
Installation must be done according to our enclosed installation instructions.
The product must not have been previously altered, modified, or repaired by anyone other
than Phason.
The product must not have been involved in an accident, misused, abused, or operated or
installed contrary to the instructions in our user and/or installation manuals. Phason's
opinion about these items is final.
The person requesting warranty service must be the original purchaser of the unit, and
provide proof of purchase upon request.
All transportation charges for products submitted for warranty must be paid by the
purchaser.
Except to the extent prohibited by applicable law, no other warranties, whether expressed or
implied, including warranties of merchantability and fitness for a particular purpose, shall apply
to the NVC. Any implied warranties are excluded.
Phason is not liable for consequential damages caused by the NVC.
Phason does not assume or authorize any representatives, or other people, to assume any
obligations or liabilities, other than those specifically stated in this warranty.
Phason reserves the right to improve or alter the NVC without notice.
Phason Inc.
2 Terracon Place
Winnipeg, Manitoba, Canada
R2J 4G7
24 2014-04-10
Phone: 204-233-1400
Fax: 204-233-3252
E-mail: support@phason.ca
Web site: www.phason.ca
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