Compact control boxes NVS... CG OPTIMA SUP and NVS... CG 0

Compact control boxes NVS... CG OPTIMA SUP and NVS... CG 0
EN
Compact control boxes NVS... CG OPTIMA SUP for supply duct air
handling units
Compact control boxes NVS... CG 0-2 for exhaust ventilating units
Operation an Maintenance manual
DTR - CG OPTIMA - ver.2.0 (05.2012)
RU
Control boxes NVS... CG OPTIMA SUP and NVS... CG 0-2 are designed according to the
European standards: EN 60335-1; EN 60439-1; EN 60439-3; EN 50082-1; EN 50081-1
www.vtsgroup.com
Table of content
I. USER'S MANUAL ............................................................................................. 3
INTRODUCTION - NVS... CG OPTIMA SUP......................................................................................................................... 3
INTRODUCTION - NVS... CG 0-2 .......................................................................................................................................... 3
USER'S MANUAL NVS CG 0-2 ................................................................................................................................................. 4
1. DESCRIPTION OF CONTROLS ......................................................................................................................................... 4
MAINS SWITCH ...................................................................................................................................................................... 4
MOTOR SWITCH..................................................................................................................................................................... 4
CONTROL MODE SWITCH .................................................................................................................................................... 4
USER'S MANUAL NVS CG OPTIMA ........................................................................................................................................ 5
1. DESCRIPTION OF CONTROLS ............................................................................................................................................ 5
MAINS SWITCH ..................................................................................................................................................................... 5
MOTOR SWITCH ................................................................................................................................................................... 5
SIGNALLING CONTROLLER STATUS ................................................................................................................................. 6
CONTROL PANEL HMI OPTIMA........................................................................................................................................... 6
SYSTEM START-UP .............................................................................................................................................................. 7
SWITCHING ON POWER SUPPLY ....................................................................................................................................... 7
QUICK START ........................................................................................................................................................................ 7
2. APPLICATION BASICS .......................................................................................................................................................... 8
HMI SETTINGS & CONNECTING TO THE CONTROLLER ................................................................................................. 9
LANGUAGE SELECTION English / Polski / Русский ...........................................................................................................10
ENTERING THE PASSWORD ..............................................................................................................................................10
3. CALENDAR  .......................................................................................................................................................................10
CALENDAR  ANNUAL  ..................................................................................................................................................11
CALENDAR  MONTHLY  ................................................................................................................................................11
CALENDAR  WEEKLY  ..................................................................................................................................................11
CALENDAR  DAILY  .......................................................................................................................................................12
CALENDAR EXAMPLE .........................................................................................................................................................12
4. PARAMETERS  ..................................................................................................................................................................14
PARAMETERS  DAMPERS  ..........................................................................................................................................14
PARAMETERS  FANS  ..................................................................................................................................................14
PARAMETERS  WATER HEATER  ................................................................................................................................14
PARAMETERS  COOLER .............................................................................................................................................14
PARAMETERS  PREHEATER  ......................................................................................................................................14
5. SETTINGS  .........................................................................................................................................................................15
SETTINGS  DEF. WORK MODE ...................................................................................................................................15
SETTINGS  STANDBY MODE  ......................................................................................................................................15
SETTINGS  PERFORMANCE  ......................................................................................................................................16
SETTINGS  TEMP. REGULATOR .................................................................................................................................16
SETTINGS  FANS  .........................................................................................................................................................17
SETTINGS  HEATER  ....................................................................................................................................................17
SETTINGS  PREHEATER  .............................................................................................................................................19
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USER’S MANUAL
1
EN
II. ADVANCED MANUAL ................................................................................... 20
6. SERVICE MENU  ............................................................................................................................................................. 20
SERVICE MENU  SERVICE MODE ............................................................................................................................. 20
SERVICE MENU  CHOOSE APPLICATION  ................................................................................................................ 20
SERVICE MENU  CONFIGURATION  .......................................................................................................................... 20
SERVICE MENU  INPUT STATES  ............................................................................................................................... 22
SERVICE MENU  OUTPUT STATES  ........................................................................................................................... 22
SERVICE MENU  INPUT EMULATION  ....................................................................................................................... 23
SERVICE MENU  OUTPUT FORCING  ........................................................................................................................ 23
SERVICE MENU  RESTORE DEFAULT SETTINGS ................................................................................................... 23
SERVICE MENU  ALGORITHM LPS  ............................................................................................................................24
8. ALARM HANDLING ............................................................................................................................................................. 24
LIST OF SELF RELEASE ALARMS .....................................................................................................................................24
LIST OF BLOCKING ALARMS ............................................................................................................................................ 25
9. TECHNICAL DATA ............................................................................................................................................................... 25
PARAMETERS OF PROTECTION UNITS .......................................................................................................................... 26
INPUT / OUTPUT HARDWARE CHARACTERISTICS ....................................................................................................... 26
10. CABLING ............................................................................................................................................................................ 27
EN
11. ELECTRICAL DIAGRAMS ................................................................................................................................................. 29
12. APPLICATION DIAGRAMS ................................................................................................................................................31
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USER’S MANUAL
I. USER'S MANUAL
INTRODUCTION - NVS... CG OPTIMA SUP
Type:
Appliance with electronic controller and text HMI, capable of programmed
operation according to the calendar.
Application:
Protection and control of supply duct air handling units equipped with:
○ single fan set with direct starting motor
○ single air damper
○ cooler and heater
Range of operation:
NVS 23 CG OPTIMA SUP - unit with 0,55kW motor
NVS 39 CG OPTIMA SUP - unit with 1,1kW motor
NVS 65 CG OPTIMA SUP - unit with 2,2kW motor
NVS 80 CG OPTIMA SUP - unit with 4,0kW motor

Note! For further information refer to USER'S MANUAL NVS CG OPTIMA
Note! NVS ventilating units can optionally operate with frequency converters and different type of
control boxes. In such case refer to respective chapter of „Compact control gear for Supply and
Supply-Exhaust Air Handling Units”.
INTRODUCTION - NVS... CG 0-2
Type:
Simplified appliance without electronic controller or HMI.
Application:
Protection and control of exhaust duct exhaust units equipped with:
○ single fan set with direct starting motor
○ single air damper
Range of operation:
NVS 23 CG 0-2 - unit with 0,55kW motor
NVS 39 CG 0-2 - unit with 1,1kW motor
NVS 65 CG 0-2 - unit with 2,2kW motor
NVS 80 CG 0-2 - unit with 4,0kW motor

Note! Exhaust control box can operate together with supply control box, making uniform supplyexhaust system.
Note! For further information refer to USER'S MANUAL NVS CG 0-2
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USER’S MANUAL
3
EN
USER'S MANUAL NVS CG 0-2
1. DESCRIPTION OF CONTROLS
MAINS SWITCH
Function:
Switching the control box On / Off
MOTOR SWITCH
EN
Function:
Overload and short circuit protection of the motor. If tripped or turned off, the motor is disconnected and
stopped and the damper is being closed.
The alarm signal from voltage-free contact, can be sent to another devices.
Note! The switch is not intended for starting / stopping the motor. This functionality is controlled via the
contactor and the control mode switch.
Note! The state of the motor switch doesn't affect operation of the contactor directly.
!
Observe the setting of the motor switch. Must be identical to the rated current of protected motor.
CONTROL MODE SWITCH
O - STOP
Fan turned off.
I - AUTO
Unit in automatic mode. Can be started remotely via terminal X1:4
See the electrical diagrams for further details. External source of 24V AC or X1:1 voltage can be
used.
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USER’S MANUAL
Note! Auto mode should be used to control exhaust unit from the supply control box NVS... CG
OPTIMA.
II - START
Fan turned on.
Note! For details of connection, refer to control box diagrams and to application diagrams included by the end
of that manual. Connection as a secondary unit to NVS CG OPTIMA is also included there.
USER'S MANUAL NVS CG OPTIMA
1. DESCRIPTION OF CONTROLS
MAINS SWITCH
EN
Function:
Switching the control box On / Off
MOTOR SWITCH
Function:
Overload and short circuit protection of the motor. If tripped or turned off, the motor is disconnected and the
signal is sent to the controller in order to trigger an alarm and stop the operation of the air handling unit.
Note! The switch is not intended for starting / stopping the motor. This functionality is controlled via the
contactor and the controller.
!
Observe the setting of the motor switch. Must be identical to the rated current of protected motor.
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5
SIGNALLING CONTROLLER STATUS
By the top edge of the PCB there are two LED indicators:
1. Red – ALR – to indicate the alarm conditions of the controller or the application
a. Off – if no alarms are recognized
b. Blinking – in case of alarm conditions
2. Green – COMM – to indicate the state of Modbus Master communication line
a. Off – no communication, HMI OPTIMA not connected
b. Blinking – in case of stable communication
!
1. All control boxes of the NVS CG OPTIMA typeline need to be powered from the main switchgear
equipped with appropriate protection of wires powering the control box.
2. Assembly, wiring and start-up of the control gear should by done by qualified staff only.
3. Control boxes NVS CG OPTIMA are intended only for indoor operation.
CONTROL PANEL HMI OPTIMA
EN
LCD Display
Displaying available parameters, settings and current values
Top line – name of the parameter
Bottom line – value or selected option
Note! If the text length exceeds the line limit, the text begins to scroll.
Keypad
• Left / Rigth arrows
to navigate across the menus and to change the parameter value
• OK
to enter another level of the menu, to enter parameters, to approve and
save changed settings, to acknowledge alarms
•C
to leave current menu level, to cancel settings and selections
Note! The mark  shows a link to the next screen. Push OK to enter.
Keep the [OK] button pressed for approx. 3 seconds to enter internal
HMI menu
Keep the [C] button pressed for approx. 3 seconds to enter Alarm menu
Refer to Advanced Manual for details.
Inbuilt temperature sensor
Measurement of room temperature.
Note! Mind the proper installation and placing of the HMI SIMPLE if it is
intended to measure room temperature in the reliable way.
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USER’S MANUAL
LED Indicators Alarm and Comm.
Indication of the unit and HMI state
• both Off – no power supply, lost communication with the controller,
HMI malfunction possible
• Comm blinking green – correct and stable communication with the
controller
• Alarm flashing red – new alarm needs to be acknowledged
• Alarm permanent red – acknowledged alarm requires further actions
to remove the cause of the problem
Function:
• Air handling unit operation, parameterization and maintenance
• Selection of control application
• Access to operation parameters of the AHU subassemblies
• Time zones setting
• Displaying and canceling alarm statuses, viewing alarm history
!
Parameters available in the LCD window depends on a AHU type and the control application. Hence
in AHUs not equipped with heater, options related to the heating module will not be visible.
SYSTEM START-UP
!
Operation of the AHU is strictly arrested by the fire-protection alarm, activation of the thermal
protection of fans' motors and threefold activation of the anti-frost thermostat. Each of these events
requires removing the cause of the alarm and then canceling it (see more details in Advanced
Manual).
SWITCHING ON POWER SUPPLY
Switching on power supply of the control gear with the mains switch (Q1M). Correct controller operation is
indicated by green LED “COMM” blinking on the PCB inside the control box and on the HMI SIMPLE device.
The system is ready for operation immediately after switching on.
QUICK START
For quick access there are four screens with the most basic
information and settings. These are sufficient for daily operation. To
run the unit quickly just do:
Unit state
Stop
• Check the Unit state screen
Stop means, the unit is already configured, free of alarms and other
malfunctions and is ready to run
Operation mode
Stop
• Check the Temp. setting and put the correct value if necessary
• Check the Temp.readout This is current measurement on the main
sensor.
Temp. setting
22.0°C
• Select the Operation mode according to current expectations
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EN
1. Stop – unit remains stopped
2. Stage I – unit run
3. Standby – unit stopped to save energy, but ready for automatic
start up, to keep the temperature within specified safe range
4. Calendar – unit working automatically, according to the real time
clock settings
Temp. readout
23.3°C
2. APPLICATION BASICS
EN
Unit state – indicates the current state of the air handling unit and
the control system
▪ Stop – normal stop of the unit
▪ Running – normal operation of the unit with ventilation and
heating / cooling enabled according to current unit state and
demand
▪ Alarm state – unit in alarm state
▪ Fault stop – unit stopped by a fault
▪ Init. heating – initial heating of the water heater, to prevent from
frost alarm during start-up
▪ Service mode – unit ready to change basic settings like
application code
Note! That is initial factory setting of the controller. See Advanced
Manual for details.
▪ Overrun – special mode for stopping the unit if equipped with DXcooler, delays stopping the fan, until safe conditions for the heat
exchanger are established
Operation mode – used to set the main operating mode from the
HMI
▪ Stop – unit stopped
▪ Stage I – unit running
Note! However Stage II can be also selected, it will be automatically
forced to Stage I, as direct starting motors run always at one fixed
speed and there's no possibility to change the rpm of the fan.
▪ Standby – unit stopped to save energy, but ready for automatic
start up, to keep the main temperature within specified safe range
▪ Calendar – unit working automatically, according to the real time
clock settings
Temp. setting – setpoint for temperature regulator
▪ Low limit: 5°C
▪ High limit: 35°C
▪ Default: 22°C
Temp. readout – current value of the temperature measured by the
main sensor
Unit state
Stop
Operation mode
Stop
Temp. setting
22.0°C
Temp. readout
23.3°C
PARAMETERS 
CALENDAR 
SETTINGS 
SERVICE MENU 
EN / PL / RU 
Change password
v.2.0 31-04-12
VS OPTIMA
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USER’S MANUAL
PARAMETERS – jump to read out the main working conditions
CALENDAR – jump to settings for time scheduled operation
SETTINGS – jump to detailed controller configuration
SERVICE MENU – jump to fundamental settings of the control
system, like application code, used in Service mode of the controller
EN / PL / RU – jump to language selection
Change password – allows entering specific password to protect
the controller from unintended access
v.2.0 31-04-12 – application version identifier
VS OPTIMA – controller type identifier
Note! All the menus are dynamically changed, as they depend on the
application settings and the password level

If the system did not start, check the F1 protection status
Correct device operation depends on the application settings. Choosing and setting up the application
should be done by qualified service provider, according to recommendations of Advanced Manual
HMI SETTINGS & CONNECTING TO THE CONTROLLER
Choose device
Holding the [OK] button, the internal menu of the HMI can be
entered.
Choose device – can be used for operation of single HMI with
multiple controllers
▪ Only one device – used for 1:1 connection with single controller
at fixed address “1” (recommended mode)
▪ Scan devices – searching through the bus to detect all addresses
occupied by several controllers
Communication period – gap between updating information with
the controller.
▪ Low limit: 0.0s
▪ High limit: 10.0s
▪ Default: 0.5s (recommended)
Communication timeout – limit for the response from the controller.
Check if using converters / repeaters on the communication line.
▪ Low limit: 0.0s
▪ High limit: 5.0s
▪ Default: 0.5s (recommended)
Contrast / Minimal brightness / Maximal brightness – settings for
the LCD appearance
Activity time – time to switch to idle state if no button operation is
performed
Communic. period
0.5s
Communic.timeout
0.5s
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EN
After activity time – defines the HMI behavior after switching to idle
state
▪ Nothing – don’t change the screen
▪ Alarms menu – jump to alarms menu if any alarm is reported
▪ Alarms/1st page – jump to alarms menu in case of the alarm
otherwise jump to main menu
HMI com speed / RS485M com speed – settings for
communication speed between the HMI and the controller. First
parameter refers to HMI speed, the other refers to the controller.
Note! The speed settings must match each other. Otherwise the
connection will be lost.
Observe communication speed in case of faulty connection.
See the electrical diagrams for the details.
LANGUAGE SELECTION English / Polski / Русский
EN
HMI supports the following languages:
EN - English
PL - Polish
RU - Russian
English is set as a default language.
Note! The alarm descriptions are always given in English.
ENTERING THE PASSWORD
Some menus are protected with a password, to avoid unintentional
change, that could be dangerous for the unit or for the user. To
access that parts of the menu, you will be asked to enter the
password.
Default password: 1111
To enter the numbers use arrow keys and confirm each time with
[OK] button.
Enter password
0___
3. CALENDAR 
CALENDAR
Calendar is an automatic functionality to provide scheduled operation
of the air handling unit according to the Real Time Clock
Set date – shows current date and allows for entering new value
Set time – shows current time and allows for entering new value
Note! At first power up the RTC could be blocked. It’s easy to find by
not running seconds on the display. However, after any change of the
time set, RTC retains normal operation.
Annual – 1st (the highest) priority schedule for setting special dates
like holidays.
Set date
Th 24-02-11
Set time
10:05.11
Annual
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USER’S MANUAL
Monthly
Monthly – 2nd priority schedule for setting special dates according
to monthly routines, like factory maintenance each 1st day of the
month.
Weekly – 3rd priority schedule for weekly routines, like weekends
Daily – 4th priority schedule for daily routines, like working hours
Clear all – erase all settings for calendar
Weekly
Daily
Clear all
CALENDAR  ANNUAL 
New program 
Inside the “Annual” menu there are visible all previously stored
programs and also the link to “New program” editor.
Entering new program allows for setting:
▪ Date and Time “from”
▪ Date and Time “to”
▪ Operation mode
▪ Temperature setpoint
New program editor ends with SAVE option. Each program must be
saved before leaving the editor.
Entering existing program allows for changing the settings (which
must be confirmed with SAVE option). There’s also DELETE function,
to erase selected program.
01-01 00:00.00
02-01 07:00.00
24-12 15:00.00
27-12 07:00.00
CALENDAR  MONTHLY 
New program 
Entering new program allows for setting:
▪ Day and Time “from”
▪ Day and Time “to”
▪ Operation mode
▪ Temperature setpoint
01 18:00.00
01 22:00.00
CALENDAR  WEEKLY 
New program 
Entering new program allows for setting:
▪ Week day and Time “from”
▪ Week day and Time “to”
▪ Operation mode
▪ Temperature setpoint
Пт 18:00.00
Пн 06:55.00
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EN
CALENDAR  DAILY 
New program 
07:00.00
14:55.00
Entering new program allows for setting:
▪ Time “from”
▪ Time “to”
▪ Operation mode
▪ Temperature setpoint
14:55.00
17:10.00
17:10.00
07:00.00
CALENDAR EXAMPLE
New program 
EN
Intended scheme of operation for the office:
1. Daily:
a. Normal working hours: 7 – 15 – work in “comfort” conditions
b. Overtime: 15 – 17 – work in “comfort” conditions, but save energy
c. Office empty overnight – keep only safe conditions, save much
energy
2. Weekly:
a. Working days: Monday to Friday
b. Weekend: keep only safe conditions, save much energy
3. Yearly:
a. Christmas: 24th – 26th December – keep only safe conditions,
save much energy
Programming step 1 – do the settings for holidays
CALENDAR  ANNUAL  NEW PROGRAMР
Date from: 24-12
Time from: 17:00.00
Date to: 27-12
Time to: 07:00.00
Operation mode: Standby
Temp. setting: 18°C
Note! Always remember to save your settings!
Programming step 2 – do the settings for weekend exception
Date from
31-12
Time from
17:00.00
Date to
27-12
Time to
07:00.00
Operation mode
Standby
Temp. setting
18°C
Save
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USER’S MANUAL
New program 
Week day from
Fr
Time from
17:00.00
CALENDAR  WEEKLY  NEW PROGRAM
Week day from: Friday
Time from: 17:00.00
Week day to: Monday
Time to: 07:00.00
Operation mode: Standby
Temp. setting: 18°C
Note! Always remember to save your settings!
Week day to
Mo
Time to
07:00.00
Operation mode
Standby
Temp. setting
18°C
Save
Programming steps 3/4/5 – do the settings for daily operation
CALENDAR  DAILY  NEW PROGRAM
Time from: 07:00.00
Time to: 15:00.00
Operation mode: Stage I
Temp. setting: 22°C
New program 
Time from
17:00.00
Time to
07:00.00
CALENDAR  DAILY  NEW PROGRAM
Time from: 15:00.00
Time to: 17:00.00
Operation mode: StageI
Temp. setting: 21°C
Operation mode
Standby
Temp. setting
18°C
CALENDAR  DAILY  NEW PROGRAM
Time from: 17:00.00
Time to: 07:00.00
Operation mode: Standby
Temp. setting: 18°C
Note! Always remember to save your settings!
Save
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EN
4. PARAMETERS 
Menu “Parameters” gives information on actual status of the unit.
Note! Data in “Parameters” is read only. For setpoints, limits, PI
tuning refer to “Settings”.
PARAMETERS 
PARAMETERS  DAMPERS 
State of the intake / outlet dampers
▪ Closed
▪ Opened
Dampers
Closed
PARAMETERS  FANS 
State of the fans
Fans status – indicates which fans are currently running
▪ Stop – none
▪ Supply – supply fan is running
▪ Supply/Exhaust – both fans are running
EN
Fan status
Stop
PARAMETERS  WATER HEATER 
State of the water heater
Pump status – state of the circulation pump
▪ Off
▪ On
Valve opening – control signal for the 3-way valve, range 0..100%
(corresponding to 0..10V hardware output)
WATER HEATER 
Pump status
Off
Valve opening
0%
PARAMETERS  COOLER 
State of the cooler
Cooler status - state of the cooling devices
▪ Off
▪ On
Cooling rate - percentage of cooling control signal, range 0..100%
(corresponding to 0..10V hardware output)
COOLER 
Cooler status
Off
Cooling rate
0%
PARAMETERS  PREHEATER 
State of the water pre-heater
Pump status – state of the circulation pump
▪ Off
▪ On
Valve opening – control signal for the 3-way valve, range 0..100%
(corresponding to 0..10V hardware output)
PREHEATER 
Pump status
Off
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USER’S MANUAL
Valve opening
0%
5. SETTINGS 
Settings is the part of the menu, where setpoints, limits, PI
parameters and other configurable values are accessed.
SETTINGS 
SETTINGS  DEF. WORK MODE 
Defines the default working mode for the calendar if none of the
settings matches current date and time. This could happen if the
“Calendar” operation will be selected as the operation mode while
the whole calendar was left blank.
▪ Stop (factory setting)
▪ Stage I
▪ Standby
Note! In such case, the temperature setpoint is taken from the
general setpoint from the main menu.
Note! However Stage II can be also selected, it will be automatically
forced to Stage I, as direct starting motors run always at one fixed
speed and there's no possibility to change the rpm of the fan.
Def. work mode
Stop
EN
SETTINGS  STANDBY MODE 
STANDBY MODE 
Defines the conditions for the “standby” functionality to be activated.
Active for – enables the standby function for different types of heat
exchangers
▪ None – standby function disabled (factory setting)
▪ Heating – standby enabled only for heating (unit starts when the
room gets too cold)
▪ Cooling – standby enabled only for cooling (unit starts when the
room gets too warm)
▪ Heating/Cooling – standby enabled for both situations
Note! Standby mode settings must be related to the heat exchangers
actually available in the unit.
Standby hyster. - defines how much the actual temperature should
differ from the temperature setpoint to activate the standby heating
up or cooling down
Note! The acceptable range of room temperatures in standby mode
equals the temperature setpoint +/- hysteresis.
Active for
None
Standby hyster.
4.0°C
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SETTINGS  PERFORMANCE 
Settings related to the capacity of heat exchangers.
Stge I Htg-limit - defines the max. value of control signal for the
heater, when the unit Operation mode is set to Stage I
▪ Low limit: 10%
▪ High limit: 100%
▪ Default: 100%
Stage I Clg-limit – defines the max. control signal for the cooler,
when the unti Operation mode is set to Stage I
▪ Low limit: 10%
▪ High limit: 100%
▪ Default: 100%
PERFORMANCE 
Stge I Htg-limit
100%
Stge I Clg-limit
100%
SETTINGS  TEMP. REGULATOR 
TEMP.REGULATOR 
EN
Supply Tmax – setting for the upper limit of supply air
temperature
▪ Low limit: 20°C
▪ High limit: 50°C
▪ Default: 40°C
Supply Tmin – setting for the lower limit of supply air temperature
▪ Low limit: 0°C
▪ High limit: 30°C
▪ Default: 15°C
Min.cooling temp. - lower limit for activating the cooling. When the
external teperature falls below the limit, the cooling functionality is
disabled and the unit can only ventilate to cool down the room.
▪ Low limit: -10°C
▪ High limit: 20°C
▪ Default: 12°C
Heating PI / Cooling PI / Supply PI – settings for PI regulators in
temperature control loop
▪ Kp – gain for the regulator
▪ Ti – integral factor for the regulator
▪ Default for heating and cooling: Kp=1; Ti=60s
▪ Default for supply limits: Kp=2; Ti=10s
Supply Tmax
40°C
Supply Tmin
15°C
Min.cooling temp
12°C
Heating PI 
Kp for heating
1.0
Ti for heating
60 s
Supply PI 
Kp for supply
2.0
Ti for supply
30 s
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16
USER’S MANUAL
SETTINGS  FANS 
Switch-on delay – startup delay for the unit.
▪ Low limit: 0s
▪ High limit: 3600s
▪ Default: 5s
Switch-off delay – delay for stopping the fan
▪ Low limit: 0s
▪ High limit: 3600s
▪ Default: 5s
FANS 
Switch-on delay
5s
Switch-off delay
5s
SETTINGS  HEATER 
HEATER 
Initial heating / Max T.Out – upper temperature limit for the initial
heating procedure. At this point the valve begins to open
▪ Low limit: 0°C
▪ High limit: 30°C
▪ Default: 8°C
Initial heating / Min T.Out – lower temperature limit for the initial
heating procedure. At this point the valve reaches 100% opening
▪ Low limit: -40°C
▪ High limit: 0°C
▪ Default: -15°C
Note! Between the points of Max and Min T.Out the valve position is
calculated with linear characteristics. For example at half the range,
the valve will be 50% opened.
Initial heating / Preheating time – setting for the initial heating
timer. After that time unit starts normal operation and the valve
opening relies on the PI regulators for heating sequence.
▪ Low limit: 0s
▪ High limit: 3600s
▪ Default: 30s
Initial heating / Fall ramp – time for the valve to close after
completing the initial heating procedure. By the time of controlled
closing, the valve position should meet the actual signal from the PI
output, so the crossing throug 0% valve opening will be avoided. The
fall ramp is intended to minimize the risk of freezing alarms, which
could happen in case of closing the valve suddenly.
▪ Low limit: 0s
▪ High limit: 3600s
▪ Default: 30s
Initial heatng 
Max T.Out
8°C
Min T.Out
-14°C
Preheating time
30 s
Fall ramp
60 s
Pump work temp.
10°C
Min. valve open
20%
PUMP PROTECT. 
Set protection
Active
Stoppage period
7d
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USER’S MANUAL
17
EN
Run time
30s
EN
Pump work temp. – setting for the external temperature which forces
the circulation pump to work continuously.
▪ Low limit: -20°C
▪ High limit: 15°C
▪ Default: 10°C
Min. valve open – lower limit for the valve position. In working unit, the
valve control signal will be at least at that level
▪ Low limit: 0%
▪ High limit: 100%
▪ Default: 20%
Pump protection / Set protection – setting to enable/disable the
protection against sticky sealing issue. The sticky sealing could happen
in case of long term inactivity of the pump, when contaminations and
deposits from the water could damage the mechanical sealing
▪ Not active
▪ Active (default setting)
Pump protection / Stoppage period – setting of the resting time for the
pump
▪ Low limit: 1day
▪ High limit: 30days
▪ Default: 7days
Pump protection / Run time – setting of the operation time for the
pump
▪ Low limit: 1s
▪ High limit: 3600s
▪ Default: 30s
Tbwtr setpoint - setting for the desired temperature of the backwater
from the heater. If unit stopped, regulator keeps exactly the setpoint. If
unit running, Tbwtr setpoint is considered as lower limit of backwater
temperature. If the Tbwtr drops, the regulator forces the valve to open
regardless to the main control loop for heating.
▪ Low limit: 20°C
▪ High limit: 70°C
▪ Default: 50°C
Note! The room could be overheated by backwater control feature. Tbwtr
control has got higher priority than the main temperature control loop.
Tbwtr setpoint
50°C
Kp Tbwtr
1.0
Ti Tbwtr
60s
Note! The backwater control feature is blocked if the outside
temperature is higher than Pump work temp.
▪ Kp Tbwtr - gain for the regulator
▪ Ti Tbwtr - integral factor for the regulator
▪ Default: Kp=1 / Ti=60s
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18
USER’S MANUAL
SETTINGS  PREHEATER 
PREHEATER 
Temp.setting
-9°C
Temp. setting - setpoint for initial heater.
Note! Preheating regulator compares the setpoint with the B3 sensor
readout. Regulation goal is to keep the B3 temperature equal to the
setpoint.
Note! Observe the application diagrams for proper placement of the
sensors.
▪ Low limit: -24°C
▪ High limit: 0°C
▪ Default: -9°C
▪ Kp - gain for the regulator
▪ Ti - integral factor for the regulator
▪ Default: Kp=1 / Ti=60s
Min. valve open – lower limit for the valve position. In working unit,
the valve control signal will be at least at that level
▪ Low limit: 0%
▪ High limit: 100%
▪ Default: 20%
Pump protection / Set protection – setting to enable/disable
the protection against sticky sealing issue. The sticky sealing
could happen in case of long term inactivity of the pump, when
contaminations and deposits from the water could damage the
mechanical sealing
▪ Not active
▪ Active (default setting)
Pump protection / Stoppage period – setting of the resting time for
the pump
▪ Low limit: 1day
▪ High limit: 30days
▪ Default: 7days
Pump protection / Run time – setting of the operation time for the
pump
▪ Low limit: 1s
▪ High limit: 3600s
▪ Default: 30s
Kp
1.0
Ti
60s
Min. valve open
20%
PUMP PROTECT. 
EN
Set protection
Active
Stoppage period
7d
Run time
30s
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USER’S MANUAL
19
II. ADVANCED MANUAL
6. SERVICE MENU 
Service menu contains the most fundamental settings, necessary for proper configuration and safe startup
of the unit. Moreover, some service–oriented functions are available here for easy maintenance and
troubleshooting for service staff.
SERVICE MENU  SERVICE MODE 
Service mode – setting to enable/disable service mode
▪ Off – the service mode disabled, controller ready for normal operation
▪ On – service mode enabled, controller ready for configuration and locked – no control functions can be
executed
▪ Default state for first power-up is On – the service mode is factory state, as the controller requires
configuration before normal operation.
Note! The controller wouldn’t start for normal operation if set to Service mode. After completing all the
configuration, switch the Service mode to Off!
EN
SERVICE MENU  CHOOSE APPLICATION 
Choose application – sub-menu for entering the Application Code that defines the actual type of the unit that
will be controlled by the control box.
▪ Application type – setting for the letters from the application code given in the datasheet of the air handling
unit
▪ ND
▪ NS
▪ Application code – the number from the application code
▪ 0..255
Note! However application types AD, AP, AR, AS could be also selected, they are not used for NVS units.
▪ Confirm code – indication if entered code is included in the list of allowed applications
▪ Error – check the settings for the type and code of the application
▪ OK – settings approved
SERVICE MENU  CONFIGURATION 
S6 switch mode – setting for the universal digital input DI1 if configured as auxiliary start/stop switch S6 (Aux).
▪ OR – switch S6 is digital OR with start / stop command set in the HMI
Note! OR is default configuration.
20
ADVANCED MANUAL
▪ AND – switch S6 is digital AND with start / stop command set in the HMI
DI1 input mode - configuration of the universal digital input DI1, three different modes can be selected
▪ S1F (Fire) - fire alarm signal, stops and locks the AHU if triggered, NC voltage free contact
▪ xSxH (Filters) - filter pressure drop warning, default setting for DI1, displays an alarm without affecting AHU
operation, NO voltage free contact
▪ S6 (Aux) - external start/stop signal, NO voltage free contact
Main sensor / Main sensor – selection of main temperature sensor for temperature regulation.
▪ P1 T.Sup – supply air duct temperature sensor
▪ HMI – room temperature sensor inbuilt in the HMI
Main sensor / Max. HMI resp. time – timeout for communication. If exceeded, the controller will report the
error of main temperature measurement.
▪ Low limit: 0s
▪ High limit: 100s
▪ Default: 15s
Tbwtr control - activation of the backwater temperature regulator
▪ Disabled - backwater regulator not active
▪ Enabled - backwater regulator active - default for Nx... applications
Note! The backwater temperature regulation is available only for Nx... applications!
!
Supply FC and Exhaust FC - these are submenus for configuration of frequency converters. The
NVS control boxes described in this manual are not capable of connecting those devices.
If your duct AHU is powered from frequency converter, it requires different type of control box VS...
CG OPTIMA or VS...CG 0-1, instead of NVS...CG types. Refer to their specific manuals.
Communication - activating Modbus communication to the frequency converter
▪ Disabled - communication not active
▪ Enabled - communication active
Modbus address - setting the Modbus address for frequency converter
▪ Default address: 2 for Supply and 3 for Exhaust
Min frequency - setting the lower limit of operating frequency
▪ Low limit: 10Hz
▪ High limit: 50Hz
▪ Default: 10Hz
Max frequency - setting the upper limit of operating frequency
▪ Low limit: 10Hz
▪ High limit: 100Hz
▪ Default: 50Hz
Acceleration - setting the speed-up time of the fan
▪ Low limit: 30s
▪ High limit: 120s
▪ Default: 30s
ADVANCED MANUAL
21
EN
Deceleration - setting the slow-down time of the fan
▪ Low limit: 30s
▪ High limit: 120s
▪ Default: 30s
Response timeout – setting for max waiting for a slave to respond. If the time was exceeded, the error will be
detected. It is recommended to not modify that parameter.
Factory setting: 0.30s
Comm break time – setting for idle time on the communication line between sending next packets. It is
recommended to not modify that parameter.
Factory setting: 2.0s
SERVICE MENU  INPUT STATES 
EN
Digital inputs – readout of the actual states of hardware digital inputs
▪ D1 – Opened / Closed
▪ D2 – Opened / Closed
▪ D3 – Opened / Closed
▪ D4 – Opened / Closed
Sensor inputs – readout of actual values read by temperature sensors Pt1000
▪ P1
▪ P2
▪ P3
Note! Normal measurement limits, ranges from -75°C to +110°C.
If the readout is actually too low, -75°C remains on the display. If too high, NS is displayed. Check the sensor
and the cabling is such situations.
SERVICE MENU  OUTPUT STATES 
Relay outputs – readout of the actual states of hardware digital outputs
▪ REL1 – Off / On
▪ REL2 – Off / On
▪ REL3 – Off / On
Analog outputs – readout of actual values sent to hardware analog outputs
▪ A1 – 0..10В
▪ A2 – 0..10В
22
ADVANCED MANUAL
SERVICE MENU  INPUT EMULATION 
Digital inputs – overwriting the states of hardware digital inputs
▪ D1 – None / Set opened / Set closed
▪ D2 – None / Set opened / Set closed
▪ D3 – None / Set opened / Set closed
▪ D4 – None / Set opened / Set closed
Sensor inputs – overwriting the actual values read by temperature sensors Pt1000
▪ P1 emulate – Disabled / Enabled – select to activate the overwriting
▪ P1 temp. – enter the value
▪ P2 emulate – Disabled / Enabled – select to activate the overwriting
▪ P2 temp. – enter the value
▪ P3 emulate – Disabled / Enabled – select to activate the overwriting
▪ P3 temp. - enter the value
SERVICE MENU  OUTPUT FORCING 
Relay outputs – overwriting the actual states of hardware digital outputs
▪ REL1 – None / Force Off / Force On
▪ REL2 – None / Force Off / Force On
▪ REL3 – None / Force Off / Force On
Analog outputs – overwriting the actual values sent to hardware analog outputs
▪ A1 forcing – Disabled / Enabled – select to activate the overwriting
▪ A1 voltage – 0..10V
▪ A2 forcing – Disabled / Enabled – select to activate the overwriting
▪ A2 voltage – 0..10V
SERVICE MENU  RESTORE DEFAULT SETTINGS 
To restore default settings of the controller press OK. Then confirm once
again.
Note! Restoring default values causes irreversible erase of all settings
done before. Full re-configuration of the controller is required.
In case of failure with the restore via HMI (e.g. HMI wouldn't communicate
with the controller), follow another procedure:
▪ turn off the power supply
▪ set all the addressing dip-switches to ON (remember original setting, to
apply that after the restore procedure)
▪ turn on the power supply (alarm LED should light up continuously)
▪ turn off the power again
▪ set the addressing dip switches to previous combination and turn on the
power supply
▪ (done)
ADVANCED MANUAL
23
EN
SERVICE MENU  ALGORITHM LPS 
Algorithm LPS indicates the speed of application execution in “loops per second”.
8. ALARM HANDLING
Alarm states are indicated by blinking display and flashing LED lamp on the HMI SIMPLE device, by switching
the relay output and by the LED lamp on the main controller PCB inside the control box.
In the HMI, alarms can be accessed via the Alarm Menu. The menu is available on long-pressing of the button
[C] (approx. 3s).
Note! In the default factory mode, the HMI switches to the Alarm Menu automatically when the alarm appears.
The actual behavior depends on the HMI settings.
Each alarm is displayed in the following manner:
A9_HW_ThAir
09:05.16 26-10
EN
where A9_HW_ThAir stands for the name of the alarm and the bottom line indicates the time and date
when the alarm was detected. Except of the displayed text, the alarm LED starts to blink when new
alarm is detected.
All the alarms can be divided in two groups:
▪ Self-release alarms – the unit is restarted automatically when the alarm signal disappears, marked
with A1, A2... codes
▪ Blocking alarms – manual acknowledge is required to restart the unit, marked with A50, A51...
codes
To acknowledge the alarm hold the [OK] button. Earlier, the cause of the alarm should be eliminated.
Otherwise, the [*] symbol will appear next to the name of the alarm, to indicate that the cause of the
alarm is still valid, regardless to the alarm confirmation. In such case, the LED stops blinking and
switches to solid red light.
Note! Each blocking alarm needs to be acknowledged separately. Holding the [OK] button affects
only the alarm, that is currently displayed on the HMI.
LIST OF SELF RELEASE ALARMS
Alarm name
Description
A1_Filter
dirty filter indication
A4_Tmain
main temperature sensor lost
A5_Tsup
Input
D1
Controller reaction
no reaction
-
unit stop
supply temperature sensor lost
P1
unit stop
A6_Tout
external temperature sensor lost
P2
unit stop
A9_HW_ThAir
frost alarm of water heater
D2
unit stop, pump On, valve
100%
A12_InEmul
emulation of input
-
unit stop
A13_OutForce
force of output
-
unit stop
A14_Troom
HMI room sensor lost
Modbus
unit stop
A15_preHW_ThAir
frost alarm of water pre-heater
D3
unit stop
24
ADVANCED MANUAL
LIST OF BLOCKING ALARMS
A50_MotSup
supply motor protection alarm
D4
unit stop
A51_MotExh
exhaust motor protection alarm
D4
unit stop
-
unit stop
P1
unit stop
P2
unit stop
D2
unit stop
unit stop
A52_3xTmain
A53_3xTsup
A54_3xTout
A57_3xHW_ThAir
main temperature sensor error repeated
3x within one hour
supply temperature sensor error repeated
3x within one hour
external temperature sensor error
repeated 3x within one hour
frost alarm of water heater repeated 3x
within one hour
A60_Fire
fire protection activated via binary input
D1
A61_3xTroom
room temperature sensor error repeated
3x within one hour
-
остановка вентиляционной
установки
9. TECHNICAL DATA
Parameter
Weight
Dimensions W x H x D
NVS ... CG OPTIMA SUP
NVS ... CG 0-2
5.5kg
5kg
380 x 320 x 150 mm
395 x 235 x 115
Electrical supply system
TN
Rated power supply voltage
3~400V
Rated current In
9A
8.5A
Rated insulation voltage Ui
400V
Rated impulse withstand voltage Uimp
2.5kV
Rated short-time withstand current Icw for respective circuits
– effective value of alternating current component withstood
during 1 second, i.e. short-circuit current expected at rated
connecting voltage
6kA
Rated peak withstand current (ipk) at cosφ= 0.5
10.2kA
Rated short-circuit current
6kA
Coincidence factor
0.9
Rated frequency
50Hz ±1Hz
Protection class
IP54
IP20
Acceptable operating temperature
0..40°C
Supply voltage of control circuits
24V AC
EMC environment
ADVANCED MANUAL
1
25
EN
PARAMETERS OF PROTECTION UNITS
F1
0.63A / 250V 5x20 slow glass fuse
F2
6,3A / 250V 5x20 glass fuse
F3
16,0A / 250V 5x20 ceramic fuse
F4
16,0A / 250V 5x20 ceramic fuse
INPUT / OUTPUT HARDWARE CHARACTERISTICS
Digital inputs D1..D4
Nominal input voltage
24V AC / 24V DC
High state detected within range
15..27V AC / 16..38V DC
Temperature measurement inputs P1..P3
EN
Sensor type
Pt1000
Min. load resistance
0Ω
Refresh time
60ms
Range
-76..105°C
Accuracy
±0.5°C
Resolution
8bits / °C
Analog outputs A1, A2
Rated voltage
0..10V
Max. load
20mA
Min. load resistance
500Ω
Resolution
7bits / V
Relay ouputs
Max. switching voltage
250VAC
Min. switching voltage
5VDC
Rated current in AC1 / DC1 class
8A
Min. current
10mA
Rated long term load
8A
26
ADVANCED MANUAL
10. CABLING
Connect power leads of the control box and the fan motor according to the Electric
diagram. The wire cross-sections have been selected for long term current capacity for
cables arranged in the air (supported on brackets, cable racks, in perforated trays) with
spacing from the wall of min. 0.3 cable diameter, insulated with PVC, for 3-conductors
loaded. Due to the protection selectivity, length, cable placement method and shortcircuit currents, revise the feeders’ cross-sections in the table below.
Wire
type
Picture
Description
Parameters
[1]
Power wires with copper
cores. PVC isolation.
Nominal voltage: 450/750V
[2]
Ambient temp: –40 .. 70°C
Номинальное напряжение: 450/750В
Температура окружающей среды: –40 .. 70°C
[3]
Shielded power cables
with copper cores. PVC
isolation.
Nominal voltage: 450/750V
[4]
Номинальное напряжение: 300/500В
Ambient temp: –40 .. 70°C
Температура окружающей среды: –40 .. 70°C
[5]
Control wires with copper
cores. PVC isolation.
Nominal voltage: 300/500V
Symbol
Wire type
No. of wires X
Cross section
[mm2]
power supply for the control gear
CG
[1]
see Table A
fire alarm switch
S1F
[3]
2x0,75
multi-function switch
S6
[3]
2x0,75
supply air temperature sensor
B1
[4]
3x0,75
external air temperature sensor
B3
[4]
3x0,75
HW back-water sensor
B7
[4]
3x0,75
S2F
[3]
2x0,75
HW analog controlled valve
Y1
[4]
3x0,75
HW circulating pump
M1
[1]
3x1,0
glycol pre-heater anti-frost thermostat
S6F
[3]
2x0,75
glycol pre-heater analog valve
Y6
[4]
3x0,75
glycol pre-heater circulating pump
M3
[3]
3x1,0
Name of the element /
connection point
HW anti-frost thermostat
ADVANCED MANUAL
27
EN
Symbol
Wire type
No. of wires X
Cross section
[mm2]
E1
[3]
2x0,75
S5F
[3]
2x0,75
cooling device analog control signal (valve)
Y2
[4]
3x0,75
HMI
N3
[5]
UTP 2 pairs
pressure control – supply primary/secondary filters
1S1H / 1S2H
[3]
2x0,75
pressure control – exhaust primary/secondary filters
2S1H / 2S2H
[3]
2x0,75
intake damper actuator
1Y1
[3]
2x0,75 / 3x,75
outlet damper actuator
2Y2
[3]
2x0,75 / 3x,75
Name of the element /
connection point
cooling device start input
cooling device alarm switch
Note! Observe the control application diagrams for connection details.
Table A
EN
Motor
rated parameters
Motor
cable
Control box
rated currents
[kW] / [V] / [A]
Control box
cable
L1/L2/L3 [A]
0.55 / 3~400 / 1.36
4×1mm²
3,46 / 1,36 / 1,36
5×1mm²
1.1 / 3~400 / 2.4
4×1.5mm²
4,5 / 2,4 / 2,4
5×1.5mm²
2.2 / 3~400 / 4.55
4×2.5mm²
6,65 / 4,55 / 4,55
5×2.5mm²
4.0 / 3~400 / 7.9
4×2.5mm²
10 / 7,9 / 7,9
5×2.5mm²
28
ADVANCED MANUAL
11. ELECTRICAL DIAGRAMS
EN
ADVANCED MANUAL
29
EN
30
ADVANCED MANUAL
ADVANCED MANUAL
31
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ADVANCED MANUAL
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ADVANCED MANUAL
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ADVANCED MANUAL
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ADVANCED MANUAL
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ADVANCED MANUAL
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40
ADVANCED MANUAL
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ADVANCED MANUAL
41
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