Phason Natural Ventilation Control User manual

Phason
3314000
2
Natu
r
T
he Nat
u
flexibilit
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temperat
u
settings.
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NVC
 Whe
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 Whe
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A
larm
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Control
Control
Curtain
Curtain
Curtain
Factor
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al Ven
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k
referenc
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o
ries and kit
s
c
onnection....
ettings overv
d
uration.........
o
ff (idle) dura
t
layout .........
overview .....
machine co
n
set point......
settings ove
r
y
defaults ......
t
ilation
o
n Control
(
N
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tain or awni
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by operati
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ature is
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for the On d
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or closes th
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ature is abo
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s
...........21
..............7
iew ......13
............11
ion ......11
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..............3
n
nection.6
............10
r
view......9
............18
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VC-2)
i
s a
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m
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n the Idle ba
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C-2 checks
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.
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the Heat s
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Features....
.
Firmware v
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Heater set
p
High alarm
.
Hysteresis.
.
Idle band...
.
Low alarm .
.
Manual ove
Menu.........
.
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mable con
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uration),
N
VC-2
N
VC-2
.......... 2
........ 19
.......... 6
........ 12
........ 14
........ 12
........ 11
........ 14
........ 16
.......... 4
.......... 6
O
O
P
R
R
T
T
T
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roller that p
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atically cont
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ding to you
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O
pen duratio
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pen off (idle
)
P
ower conne
c
R
ain sensor..
.
R
atings.........
.
T
emperature
p
T
emperature
t
T
emperature
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roubleshooti
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ols the
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duration ....
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tion.............
.
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robe...........
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est mode ....
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nits.............
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....7
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..14
..21

Natural Ventilation Control Phason
2 2013-08-26
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 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-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
Two-year limited warranty
Electrical ratings
Input power 85 to 264 VAC, 50/60 Hz
Open/close/heat relays 15 A at 120/230 VAC, resistive load
1/2HP at 120 VAC, 1 HP at 230 VAC
Alarm relay 0.4 A at 125 VAC; 2 A at 30 VDC, resistive load
0.2 A at 125 VAC; 1 A at 30 VDC, inductive load
If you are connecting any equipment that exceeds the ratings of the relays, you must
install power contactors. For more information, read Power contactors on page 22.

Phason Natural Ventilation Control
33140002 3
Becoming familiar with the NVC-2
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
Down
▪Scroll down
▪Decrease a value
Up
▪Scroll up
▪Increase a value
Select
▪Select an option
▪Accept a value
Back
▪Go back
▪Cancel changes
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
Status LEDs
▪Show the status of the relays
▪Show which relay is being
controlled
Programming LEDs
▪Show which setting is being
displayed or programmed

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4 2013-08-26
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 Up or Down to move through the menu items.
Menu item Display Function
Open
Close CurtSelect automatic or manual override (open, close, or idle)
Heat heatSelect automatic or manual override (on or off)
Alarm aLarSwitch the alarm relay on or off
Test testAdjust the test temperature
Restore the factory defaults
Version VerDisplay the firmware version
Update the firmware version
Set point stptAdjust the curtain set point
Open on duration OonAdjust the curtain open duration
Open off duration OoffAdjust the open idle duration
Close on duration ConAdjust the close duration
Close off duration CoffAdjust the close idle duration
Idle band bandAdjust the Idle band
Heat set point HeatAdjust the heater set point
High alarm HiaLAdjust the high alarm temperature
Low alarm LoaLAdjust the low alarm temperature
Hysteresis Hyst Adjust the hysteresis for the heater
Units UnitChange between Fahrenheit and Celsius
Sensor sensEnable the optional rain sensor
Installing the NVC-2
Read and follow all instructions when installing the NVC-2 and connecting
equipment to it.
Read Electrical ratings on page 2. Do not exceed the electrical ratings of the
control.

Phason Natural Ventilation Control
33140002 5
NVC-2 layout
Incoming power terminal: connect the incoming power (85 to 264 VAC, 50/60 Hz) to this terminal. For more
information, read Connecting the power source on page 8.
Open and close relay terminals: connect a curtain machine to these terminals. For more information, read
Connecting a curtain machine on page 6.
Heater relay terminal: connect a heater or furnace to this terminal. For more information, read Connecting a gas-
fired furnace or electric heater on page 6.
Temperature probe terminal: connect the temperature probe to this terminal. For more information, read
Connecting on page 7.
Display connector: make sure the ribbon cable from the display is properly connected.
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.
USB connection: connect a USB memory stick to this connector to update the firmware. For more information,
read Updating the firmware on page 19.
1
2
3
4
5
6
7
8
9
+IN–
INPUT
CC CA OA
ALARM
LN
AC LINE
OPEN CLOSE HEAT
TEMP
USB
1 2 3 4
5
6
78
9

Natural Ventilation Control Phason
6 2013-08-26
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.
Mount the enclosure to a wall using the four screws provided with the control. Insert the screws
into the large holes in each corner of the box and then tighten.
Connecting a curtain machine
Curtains are usually controlled by equipment called
curtain machines, which are sometimes referred to as
winches .
The NVC-2 opens and closes the curtain to let in
more air or less air, the idea being more air cools the
building.
Connecting a gas-fired furnace or electric heater
Connect the heater as shown in the following diagram that matches your application.
Gas furnaces using hot-surface ignition or a glow plug can draw more current than
indicated on their nameplate, and require power contactors. For more information,
read your furnace manual.
Thermostat
inputs
L1
L2/NEUTRAL
Junction box
L1
L2/NEUTRAL
HEAT HEAT
Gas-fired furnace Electric heater
L1
L2/NEUTRAL
OPEN CLOSE
OPEN CLOSE
CURTAIN
MOTOR
LN
AC LINE

Phason Natural Ventilation Control
33140002 7
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-2 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
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-2 alarm relays must be in
parallel with each other so any control can trigger
the alarm system when an alarm condition occurs.
TEMP
Normally open system (closed on alarm)
CONTROL CONTROL
POWER
SUPPLY

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8 2013-08-26
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-2 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
Connect the incoming power (85 to 264 VAC, 50/60
Hz) as shown in the following diagram.
Finishing the installation
After you have finished connecting all equipment:
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-2; it should display ŠŠŠŠ for three seconds, the version (for
example, vƒ00) for three seconds, and then the temperature.
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
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-2 on page 15
5. Fasten the cover to the base.
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.
CIRCUIT
PANEL
L1
L2/NEUTRAL
LN
AC LINE
OPEN
CONTROL CONTROL
POWER
SUPPLY
Normally closed system (open on alarm)

Phason Natural Ventilation Control
33140002 9
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.
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. After closing, the curtain holds its position for the Close off duration. If the
temperature is still below the Idle band, the curtain again closes for the Close on duration, and the
process repeats.

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10 2013-08-26
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.
Open off duration: 120 seconds
After the curtain opens for the ,
it holds its position for the .
Time (seconds)
Temperature
Set point (80°F)
Open on duration: 30 seconds
If the temperature rises above the ,
t
he curtain opens for the .
Close off duration: 150 seconds
After the curtain closes for the , it
holds its position for the .
Close on duration: 60 seconds
If the temperature falls below the ,
t
he curtain closes for the .
Idle band: 4° (+/
–
2°F)
When the temperature is within the ,
t
he curtain remains in its current position.
Time (seconds)