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Natural Ventilation Control 

Phason 

18  

2013-08-26 

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. 

Содержание Natural Ventilation Control

Страница 1: ...emperature ature is below er on ature is abov er off e s 21 7 iew 13 11 ion 11 5 3 nnection 6 10 rview 9 18 Contro NVC 2 is a ng control n ng a curtain m in the Idle ba position bove the Idle uration...

Страница 2: ...d 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 enclo...

Страница 3: ...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 L...

Страница 4: ...tpt 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...

Страница 5: ...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 conn...

Страница 6: ...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...

Страница 7: ...m 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...

Страница 8: ...rminals 2 Place the cover on the control 3 Switch on the power to the NVC 2 it should display for three seconds the version for example v 00 for three seconds and then the temperature If the display d...

Страница 9: ...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 t...

Страница 10: ...t 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...

Страница 11: ...nge 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...

Страница 12: ...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...

Страница 13: ...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 am...

Страница 14: ...4 Press Down to move to the Hysteresis or Back to cancel and return to the main display Changing the temperature units The NVC 2 can display temperatures in Fahrenheit or Celsius The default is Fahre...

Страница 15: ...s 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 te...

Страница 16: ...n 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...

Страница 17: ...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 heat...

Страница 18: ...lts 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 Sele...

Страница 19: ...ou 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 upda...

Страница 20: ...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 m...

Страница 21: ...iring The display shows unusually high or low temperature The probe is not a Phason probe Remove the probe and then install a Phason probe The extension cable connected to the temperature probe is pro...

Страница 22: ...40 includes power contactor relay and mounting hardware for easy mounting in an enclosure Power contactor kit 122 1 includes power contactor relay on off auto switch and label snubber filter reduces e...

Страница 23: ...d 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 k...

Страница 24: ...he 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...

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