Phason NVC-2-12 User manual

Phason
3344000
0
Natu
r
T
he Nat
u
provides
automati
c
and heat
e
Model N
V
Controlli
n
 Whe
n
the
N
 Whe
n
the c
u
durat

A
fte
r
then
e
depe
n
Controlli
n
 Whe
n
switc
h
 Whe
n
switc
h
Quic
k
A
ccess
o
A
larm
c
A
larm
s
Close
d
Close
o
Control
Control
Curtain
Curtain
Curtain
Factor
y
0
r
al Ven
t
u
ral Ventilati
o
extensive fl
e
c
ally control
s
e
r according
V
C-2-12 is 1
2
n
g a curtain
n
the temper
N
VC maintai
n
n
the temper
u
rtain for th
e
ion .
r
each Off du
r
e
ither opens
n
ding on the
n
g a heater
n
the temper
h
es the heat
e
n
the temper
h
es the heat
e
k
referenc
e
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
e
xibility for y
o
s
the temper
a
to your pro
g
2
VDC-pow
e
machine
ature is
w
ith
i
n
s the curtai
n
ature rises a
b
e
On duratio
n
r
ation , the N
V
or closes th
e
temperatur
e
ature is belo
w
e
r on.
ature is abo
v
e
r off.
e
s
...........21
..............7
iew ......13
............11
ion ......11
..............5
..............3
n
nection.6
............10
r
view......9
............18
Contro
N
VC) is a f
u
o
ur curtain
o
a
ture in a ro
o
g
rammed set
t
e
red; model
N
i
n the Idle b
a
n
position.
b
ove the Idle
n
, and then
p
V
C checks t
h
e
curtain (fo
r
e
.
w
the Heat s
e
v
e the Heat s
e
Features....
.
Firmware v
e
Heater con
n
Heater set
p
High alarm
.
Hysteresis.
.
Idle band...
.
Low alarm .
.
Manual ove
Menu.........
.
Mounting ..
.
l, 12/2
4
u
lly program
m
o
r awning co
n
o
m by opera
t
t
ings.
N
VC-2-24
i
s
2
a
nd of the S
e
band , the
N
p
auses for th
e
h
e temperat
u
r
the preset
d
e
t point , the
e
t point , the
N
.
....................
.
e
rsion ...........
.
n
ection.........
.
p
oint .............
.
.
....................
.
.
....................
.
.
....................
.
.
....................
.
rride mode ..
.
.
....................
.
.
....................
.
4
V
m
able contr
o
ntrol needs.
T
t
ing a curtai
n
2
4 VDC-po
w
e
t point ,
N
VC opens
e
Off
u
re and
d
uration),
NVC
NVC
.......... 2
........ 19
.......... 6
........ 12
........ 14
........ 12
........ 11
........ 14
........ 16
.......... 4
.......... 6
O
O
P
R
R
T
T
T
T
o
ller that
The NVC
n
machine
w
ered.
O
pen duratio
n
O
pen off (idle
)
P
ower conne
c
R
ain sensor..
.
R
atings.........
.
T
emperature
p
T
emperature
t
T
emperature
u
T
roubleshooti
n
...................
)
duration ....
c
tion.............
.
....................
.
....................
p
robe...........
t
est mode ....
u
nits.............
ng................
1
..10
..11
....8
..14
....2
....7
..15
..14
..21

Natural
V
2
Featu
r

A
uto
m
w
ith
e
-13 t
o
 Prog
r
the o
p
1 to
9
 Prog
r
1.0 t
o
 Prog
r
0.3 t
o
 Prog
r
alar
m
 Two
c
 Heat
e
Electr
i
 Input
 Ope
n
 Alar
m
V
entilation
r
es
m
atic tempe
r
e
xtended te
m
o
125°F
(
-25
r
ammable O
n
p
en and clo
s
9
00 seconds
r
ammable I
d
o
10.0°F (0.6
r
ammable h
e
o
5.0°F (0.2
t
r
ammable H
i
m
s
c
urtain relay
s
e
r control re
l
i
cal rati
n
power
n
/close/heat
m
relay
If you are
c
install pow
e
Control
r
ature-based
m
perature ra
n
to 51.7°C)
n
and Off d
u
s
e relays
(up to 15 mi
n
d
le band
to 5.5°C)
e
ater Hystere
t
o 2.8°C)
i
gh and Lo
w
s
(
one open,
l
a
y
n
gs
M
o
M
o
r
elays 12
15
1/
2
0.
4
0.
2
c
onnecting
a
e
r contactor
control,
n
ge
u
rations for
n
utes)
sis
w
temperatur
e
one close)
o
del NVC-2-1
o
del NVC-2-2
4
A at 30 VD
C
A at 120/2
3
2
HP at 120
4
A at 125 V
A
2
A at 125 V
A
a
ny equipm
e
s. For more
e

A

F

F

P

M

P

T
5

R

R
w

L
2
12 VD
C
4
24 VD
C
C
3
0 VAC, resis
VAC, 1 HP
a
A
C; 2 A at 3
0
A
C; 1 A at 3
0
e
nt that exc
e
information
A
larm relay
(
F
our-button
F
our-charac
t
P
rogrammi
n
M
anual over
P
ower-failur
e
T
emperatur
e
5
00 feet
R
ain Sensor
R
ugged encl
o
w
ater resista
n
L
imited war
r
C
, 250 mA
C
, 125 mA
s
tive load
a
t 230 VAC
0
VDC, resis
t
0
VDC, indu
c
e
eds the rati
, read
Pow
e
(
for external
keypad
t
er LED dis
p
n
g and status
ride/test m
o
e
settings pr
o
e
probe, 6 fe
e
(optional)
o
sure (corro
n
t, and fire r
r
anty (two y
e
t
ive load
ctive load
ngs of the r
e
e
r contactor
s
Ph
a
2014
-
alarm syste
m
p
la
y
LEDs
o
de
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tection
e
t extendabl
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sion resistan
etardant)
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ars)
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lays, you
m
s
on page 2
2
ason
-
04-10
m
)
e
to
t,
m
ust
2
.

Phason Natural Ventilation Control
33440000 3
Becoming familiar with the NVC
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

Natural
V
4
Main
m
When yo
u
w
hich m
e
Menu ite
m
Open
Close
Heat
Alarm
Test
Version
Set point
Open on d
Open off
d
Close on
d
Close off
d
Idle band
Heat set p
High alar
m
Low alar
m
Hysteresi
s
Units
Sensor
Instal
l
V
entilation
m
enu
u
are in the
m
e
nu item is s
e
m
uration
d
uration
d
uration
d
uration
o
in
t
m
m
s
ing the
N
Read a
n
equipm
e
Read El
e
control.
Control
m
ain menu,
t
e
lected. Pres
s
Displ
a
Cur
t
hea
t
aLa
r
tes
t
Ver
stp
t
Oo
n
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f
Co
n
Co
f
ban
d
Hea
t
Hia
L
Loa
L
Hys
t
Uni
t
sen
s
N
VC
n
d follow all
e
nt to it.
e
ctrical ratin
t
he display s
h
s
Up or Dow
a
y
t

t

r
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t
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t
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f
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L

L

t
t
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s

instructions
gs on page
h
ows the me
n
n to move t
h
Function
Select autom
a
Select autom
a
Switch the al
a
Adjust the tes
Restore the f
a
Display the fi
r
Update the fir
m
Adjust the cu
r
Adjust the cu
r
Adjust the op
e
Adjust the clo
Adjust the clo
Adjust the Idl
e
Adjust the he
a
Adjust the hig
Adjust the lo
w
Adjust the hy
s
Change betw
e
Enable the op
t
when instal
2. Do not e
x
nu items; th
e
h
rough the
m
a
tic or manual
o
a
tic or manual
o
a
rm relay on or
s
t temperature
a
ctory defaults
r
mware version
m
ware version
r
tain set poin
t
r
tain open dura
t
e
n idle duration
o
se duration
o
se idle duratio
n
e
band
a
ter set poin
t
g
h alarm tempe
r
w
alarm temper
a
s
teresis for the
e
en Fahrenheit
a
tional rain sens
ling the NV
C
x
ceed the el
e
LEDs ligh
t
m
enu items.
o
verride (open,
o
verride (on or
o
off
t
ion
n
r
ature
a
ture
heate
r
a
nd Celsius
s
o
r
C
and conn
e
l
ectrical rati
n
Ph
a
2014
-
t
up to show
close, or idle)
o
ff)
e
cting
n
gs of the
ason
-
04-10
you

Phason
3344000
0
NVC la
y
Op
e
Co
n
He
a
ga
s
DC
on
t
Te
m
Co
n
Dis
Ala
Co
n
Inp
on
US
B
rea
d
2
1
3
4
5
6
7
8
9
0
y
out
e
n and close r
e
n
necting a curt
a
ter relay term
s
-fired furnace
power termin
a
t
he model. For
m
m
perature pro
b
n
necting on p
a
play connecto
r
rm relay termi
n
n
necting an al
a
ut terminal: co
page 21.
B
connection:
c
d
Updating the
1
2
e
lay terminals:
a
in machine o
n
inal: connect a
or electric he
a
a
l: connect the
b
m
ore informati
o
b
e terminal: co
n
a
ge 7.
r
:make sure th
e
n
al: connect a
n
a
rm system on
nnect an optio
n
c
onnect a USB
m
firmware on p
a
2
3
5
connect a curt
a
n
page 6.
heate
r
or furn
a
a
ter on page 6.
b
attery cable to
o
n, read Conne
c
n
nect the temp
e
e
ribbon cable f
n
external alarm
page 7.
n
al Rain Sensor
m
emory stick t
o
a
ge 19.
5
6
4
a
in machine to
t
ce to this termi
this terminal.
T
c
ting the powe
r
e
rature probe t
o
rom the displa
y
system or sire
n
to this termina
l
o
this connecto
t
hese terminals
nal. For more i
n
T
he terminal lab
r
source on pa
g
o
this terminal.
F
y
is properly co
n
n to this termin
a
l
. For more info
r to update the
9
Natural Ve
n
. For more info
r
n
formation, rea
d
el will be 12 or
g
e 8.
F
or more infor
m
n
nected.
a
l. For more inf
rmation, read
P
firmware. For
m
7
n
tilation C
o
r
mation, read
d
Connecting a
24 VDC, depe
n
m
ation, read
ormation, read
P
hason Rain S
e
m
ore informatio
8
o
ntrol
5
n
ding
e
nsor
n,

Natural
V
6
Mounti
n
 Selec
t
equi
p
 Rem
o
 Mou
n
into
t
Conne
c
Curtains
curtain
m
winches .
The NV
C
air or les
s
building.
Conne
c
Connect
V
entilation
n
g the NV
C
t
a location
f
p
ment you w
a
o
ve the scre
w
n
t the enclos
t
he large hol
e
c
ting a cu
r
are usually c
o
m
achines, wh
i
C
opens and
s
air, the ide
a
c
ting a ga
s
the heater a
s
Gas furnac
indicated
o
read your f
u
Control
C
f
or the NVC
.
a
nt to contr
o
w
s from the
f
ure to a wall
e
s in each co
r
r
tain mac
h
o
ntrolled by
i
ch are some
t
closes the c
u
a
being more
s
-fired fur
s
shown in t
h
es using ho
t
o
n their nam
e
u
rnace man
Gas-fired f
u
.
Make sure
y
o
l.
f
ront cover a
using the fo
r
ner of the
b
h
ine
equipment
c
t
imes referr
e
u
rtain to let i
n
air cools th
e
nace or e
l
h
e following
d
t
-surface ig
n
e
plate, and
ual.
u
rnace
y
ou have en
o
n
d then gen
t
ur screws pr
b
ox and the
n
c
alled
e
d to as
n
more
e
l
ectric he
a
d
iagram tha
t
n
ition or a gl
require po
w
o
ugh cable a
n
t
ly lift it off.
r
ovided with
n
tighten.
a
te
r
t
matches yo
u
l
ow plug ca
n
w
er contacto
r
Electric heat
e
n
d wire to re
a
the control.
u
r applicatio
n
n
draw mor
e
rs. For mor
e
e
r
Ph
a
2014
-
a
ch the
Insert the s
c
n
.
e
current th
a
e
informatio
n
ason
-
04-10
c
rews
a
n
n
,

Phason Natural Ventilation Control
33440000 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 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 alarm relays must be in parallel
with each other so any control can trigger the
alarm system when an alarm condition occurs.
Normally open system (closed on alarm)

Natural Ventilation Control Phason
8 2014-04-10
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 (12 VDC, 250 mA)
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.
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 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 on page 15
5. Fasten the cover to the base.
Normally closed system (open on alarm)

Phason Natural Ventilation Control
33440000 9
Programming the NVC
Before you begin programming the NVC, 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.

Natural Ventilation Control Phason
10 2014-04-10
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)

Phason Natural Ventilation Control
33440000 11
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.

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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 How hysteresis works
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 Heat.
2. Press Select.
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 Heat.
4. Press Down to move to the High alarm, or Back to cancel and return to the main display.
How hysteresis works
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
furnace at 67°F when the house is cooling down, but
switch it off at 70°F when the house is warming up. The
difference between these two values is the hysteresis.
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.
Set point: 67°F
Hysteresis: 3°F
Set point+
hysteresis: 70°F Heater OFF
Example for heaters

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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
The ambient temperature is too high.
The high temperature alarm setting is
too low.
Increase ventilation/cooling.
Increase the high temperature alarm setting.
For more information, read To program the
High alarm on page 14.
Lo
Low temperature alarm
The ambient temperature is too low.
The low temperature alarm setting is
too high.
Decrease ventilation/cooling, increase heating.
Decrease the low temperature alarm setting.
For more information, read To program the
Low alarm on page 14.
pd
Probe damage alarm
The temperature probe is damaged,
missing, or the connecting wire is
broken. The temperature probe
circuit is open.
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.
ps
Probe short alarm
The temperature probe is damaged.
The temperature probe circuit is
closed.
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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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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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 Test 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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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 (off) and the Alarm LED flashes.
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 Auto.
If you are in override mode, the display shows Ovrd.
3. Press Up or Down until Ovrd (override) displays.
4. Press Select.
The display shows idLe (idle).
5. Press Down to switch between idle/stop and open (open), or press Up to switch between idle
and cLos (close). Each time you press the button the curtain starts or stops moving.
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.

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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 (Curt for curtain or heat for
heater).
2. Press Select.
The relay LED(s) blink rapidly and the display shows Ovrd.
3. Press Up or Down until the display shows Auto.
4. Press Select.
The display shows Curt or heat, depending which item you chose in step 1.
5. Press Up or Down to select a different menu item, or press Back to return the main display.
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 Auto.
If you are in override mode, the display shows Ovrd.
3. Press Up or Down until the display shows Ovrd.
4. Press Select.
The display shows on (on).
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 Curt.
7. Press Up or Down to select a different menu item, or press Back to return the main display.

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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 power on method or the power
off method. The power on method is the easiest way to restore the factory defaults. If, for some
reason, the power on method does not work, use the power off method.
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 Test 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.

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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 power on method or the power off
method. The power on method is the easiest way to update the firmware. If, for some reason, the
power on method does not work, use the power off method.
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 root of the drive means not in a
folder .

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20 2014-04-10
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 Test LED blinks rapidly.
9. Release the button.
While the Test 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 Test LED blinks rapidly.
5. Release the button.
While the Test 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.