Ventus N-type NVS 080 User manual

Ventus Standard unit automation
Quick assembly, wiring and commissioning instruction
step by step

table of contents
1INTRODUCTION........................................................................................................................................3
2INSTALLATION OF AUTOMATION COMPONENTS AND WIRING................................................................ 3
2.1 POWER SUPPLY CIRCUITS FOR CONTROL PANEL COMPONENTS.............................................................................. 3
2.1.1 Control panel power supply circuits .................................................................................................. 3
2.1.2 Power supply circuits for electric heater and optional equipment outside the VTS offer.................. 5
2.2 CONTROL CIRCUITS -GENERAL INFORMATION................................................................................................... 6
2.2.1 Connection diagram for the uPC3 driver and extension module....................................................... 6
2.3 ANALOG AND DIGITAL (DISCRETE)CONTROL CIRCUITS....................................................................................... 10
2.3.1 Installation and connection of temperature sensors....................................................................... 10
2.3.2 Connecting filter pressure switches................................................................................................. 11
2.3.3 Connection of damper actuators (intake, exhaust, recirculation, by-pass)..................................... 11
2.3.4 Connection of water heater antifreeze thermostat......................................................................... 12
2.3.5 Connection of controls for electric pre-heater and re-heater.......................................................... 12
2.3.6 Connecting control for optional devices outside the VTS offer (condensing unit, humidifier, etc.). 12
2.4 COMPONENTS WITH MODBUS COMMUNICATION .......................................................................................... 12
2.4.1 Wiring used for ModBUS communication ....................................................................................... 15
2.4.2 PCB EC extension module with ModBUS communication ............................................................... 15
2.4.3 Pressure transmitters with ModBUS communication ..................................................................... 15
2.4.4 Humidity transmitters with ModBUS communication..................................................................... 17
2.4.5 CO2 transmitter with ModBUS communication .............................................................................. 17
2.4.6 Inverters (frequency converters) with ModBUS communication (for fans and rotary heat
exchanger).................................................................................................................................................... 18
2.4.7 EC motors of fan sets and rotary heat exchanger with ModBUS communication .......................... 20
3AHU OPERATION - GENERAL INFORMATION.......................................................................................... 20
4THE FIRST LAUNCH OF AHU, CONFIGURING BASIC PARAMETERS........................................................... 21
4.1 PRELIMINARY ACTIONS BEFORE STARTING AHU.............................................................................................. 21
4.2 AHU CONTROL WITH HMI ADVANCED ......................................................................................................... 21
4.2.1 Description of buttons and elements of the main display screen.................................................... 21
4.2.2 Logging in to the „Menu” module ................................................................................................... 23
4.3 SETTING THE CONTROLLER APPLICATION CODES .............................................................................................. 24
4.4 ACTIVATION OF CONTROLLER INPUTS AND OUTPUTS ........................................................................................ 26
4.5 SENSORS CALIBRATION............................................................................................................................... 27
4.6 OVERWRITING AND SIMULATING THE VALUES OF INPUT AND OUTPUT PARAMETERS OF THE CONTROLLER.................... 27
4.7 CONFIGURATION OF COMPONENTS WITH THE MODBUS PROTOCOL ................................................................... 27
4.7.1 Checking the correctness of setting general communication parameters ...................................... 28
4.7.2 Configuration of communication with inverters (in AHU with AC motors) ..................................... 28
4.7.3 Communication configuration with fans equipped with EC ............................................................ 28
4.7.4 Programming EC motors ................................................................................................................. 30
4.7.5 Configuration of communication with a rotary heat exchanger ..................................................... 31
5USE OF AHU ........................................................................................................................................... 32
5.1 SETTING THE OPERATIONAL PARAMETERS (TEMPERATURE,HUMIDITY,EFFICIENCY,ETC.)......................................... 32
5.2 SWITCHING ON THE AHU, CHANGING THE OPERATING MODES .......................................................................... 33
5.3 VIEWING CURRENT OPERATING PARAMETERS ................................................................................................. 34
5.4 ALARMS.................................................................................................................................................. 34
5.5 SETTING THE WEEKLY CLOCK ....................................................................................................................... 34

1Introduction
This manual is intended for customers who want to independently assembly, wire and commission
the factory VTS automation in the new VENTUS STANDARD air handling unit. The manual applies only
to air handling units with the configuration available in CCOL4, equipped with standard accessories
offered by VTS, which do not require changing advanced parameters of the control system.
This manual may be helpful when assembling and commissioning the automation in control panels
with unusual configurations or operating parameters, or cooperating with external accessories
outside the VTS offer, but then it is necessary to use the advanced instruction manual available on
the VTS website.
ATTENTION:
The ventilation unit control panel is a key element of the automation and is powered by dangerous
voltage 230 / 400V, just like the fan motors and other components of the unit. Therefore, activities
related to the assembly, wiring and commissioning of the said automation of VENTUS air handling
units may only be carried out by authorized persons in the scope of assembly and operation of
electrical devices in accordance with applicable regulations.
Independent assembly and commissioning of factory automation of VENTUS AHUs additionally
requires basic knowledge in the field of automation of air handling units.
2Installation of automation components and wiring
VTS factory automation is an optional equipment of offered control panels. Due to their wide
functional diversity and the need to adapt the location of the control cabinet to the site conditions,
the automation components are delivered to the customer separately for installation in the control
panel at its final location.
Installation of automation components should be carried out by persons with appropriate
qualifications and experience. Therefore, we will discuss only those elements that require special
attention.
The wiring elements are out of the VTS scope of delivery, therefore, for the correct and safe
functioning of the device, please strictly adhere to the recommendations as to the type and quality of
these elements.
Installation of automation begins with determining the location of the power supply and control
cabinet, which results from the object's conditions, the convenience of operating the control panel
and the user's preferences. It should be remembered that the control wiring should not be too long
to minimize the impact of interferences.
2.1 Power supply circuits for control panel components
2.1.1 Control panel power supply circuits
The control panel is powered by 1 x 230V / 50Hz or 3 x 400V / 50Hz voltage, depending on the load
power. The cross-section of the power cable should be adapted to the maximum load current.
In the supply cabinet before the control panel, a circuit breaker should be used, adapted to the cable
cross-section and control panel power, to meet the conditions of electric shock protection. The size
of the short circuit protection in the preceding cabinet should be selected in accordance with the
regulations by an authorized electrician. If RCCBs are used in the preceding cabinet, they must be
adapted to operate with frequency converters.
Fan sets (with EC or AC motors), rotary heat exchanger motor and water heater pump are powered
from the control panel. The control panel is equipped with overcurrent breakers to protect these

components. The cross-section of the power supply wiring for these components should be adapted
to the load current. Pay attention to the correct connection of this wiring, especially the PE cable.
AC motors (if used) are powered via frequency converters. EC motors are equipped with integrated
control systems. The power supply configuration of individual components for air handling units with
AC or EC motors is shown in Fig. 1a and 1b, respectively.
*) up to the size of the VVS300 unit, the exchanger is driven by an EC motor, for size VVS400 and
larger the exchanger is driven by an AC motor with an inverter
Fig. 1a Components supplied from the control panel (AHU with AC motors)
When using AC motors, frequency converters (inverters) should be installed in places not exposed to
moisture and mechanical damage, as close as possible to the fan units (preferably outside, on the
back of the fan sections), since the length of the cabling connecting the inverters to the motors
should not exceed 10 m (detailed data can be found in the tech specs of inverters). In the case of
external AHUs, the inverters should be installed in metal cabinets equipped with a heater and fan,
controlled by a thermostat to ensure a temperature in the vicinity of the inverters between -10 ° C
and + 40 ° C.

To connect the motors with frequency converters (inverters), shielded cables should be used with
cross-section adapted to the load currents. The shield should be connected to the "PE" terminal in
both inverters and motors.
To supply frequency converters (AC motors) or EC motor controllers use cables with 600V test
voltage.
Fig. 1b Components supplied from the control panel (AHU with EC motors)
2.1.2 Power supply circuits for electric heater and optional equipment outside the VTS offer
The electric heater and optional equipment outside the VTS offer (humidifier, refrigeration unit, etc.)
require a separate cable for supply (Fig. 2). In the preceding power cabinet, overcurrent breakers
should be used, adapted to the cable cross-section and heater power, so that the conditions of
electric shock protection are met. Use a cable with a cross-section adapted to the maximum power
of the heater, enabling the connection of a PE protective terminal.
Accessories and components outside the VTS offer should be connected in accordance with the
documentation of these devices.

Fig. 2 Accessories requiring a separate power supply
2.2 Control circuits - general information
2.2.1 Connection diagram for the uPC3 driver and extension module
Individual automation components communicate with the controller either using analog and digital
I/O, or using digital communication with the ModBUS protocol.
Some of the analog and digital inputs / outputs are implemented directly by the uPC3 controller and
some via extension boards (e.g. PCB EC).
Graphic illustration of the signal assignment to individual electronic modules is shown in Figure 3.
ATTENTION:
∙Depending on the application code entered, the controller dynamically sets the pin functionality.
Thus, a single physical output can perform various functionalities, e.g. as many as six different tasks
are assigned to two 0-10V analog outputs.
The reason for this solution is the universalism of VTS automation, enabling the use of the same
controller for tens of thousands of types of applications. Lack of static assignment of signals to
individual controller outputs prevents the publication of diagrams in the technical documentation
available on the VTS website. The diagram is generated dynamically with the selection card. If
required, it can be additionally generated by a sales representative or VTS Service Department.

Before starting the installation of the wiring, refer to the wiring diagram of the controller inputs and
outputs provided with the AHU.
Fig. 3. Connection of analog and digital (discrete) I/O signals
Fig. 4 shows a general connection diagram for the uPC3 controller and PCB EC module.
Fig. 5 shows an example diagram of connecting the controller I / O signals for a specific application.

Fig. 4. Connection diagram of the uPC3 controller and PCB EC module

Fig. 5. Example diagram of signal connection to the uPC3 controller and PCB EC module for a
control panel with FHPHCV / FVP configuration (application code
AP|1|1|0|1|0|0|0|6|3|0|0|0|0|0|1)

2.3 Analog and digital (discrete) control circuits
2.3.1 Installation and connection of temperature sensors
Connect the temperature sensors to the controller using shielded cables with a minimum cross-
section of 0.5 mm2. Location of temperature sensors:
B1 –supply air temperature. Installation in the supply air duct, approximately 2 m behind the heater
B2 –temperature in the exhaust duct or as a room sensor (cable length not greater than 100 m)
B3 –outside temperature in the intake duct
B4 –sensor responsible for protecting the heat recovery exchanger from frosting - location depends
on the type of exchanger. Particular attention should be paid to the correct location of the
temperature sensor protecting the rotary heat exchanger (Fig. 6). Incorrect location of this sensor
may lead to reduced AHU efficiency.
Fig 6a. Location of B4 sensor behind the rotary heat exchanger for the supply air track at the top or
bottom of the unit –AHU size from VVS21 to VVS300.

Fig 6b. Location of B4 sensor behind the rotary heat exchanger for the supply air track at the top or
bottom of the unit –AHU size from VVS400 to VVS650.
B5 –contact sensor, mounted on the return pipe from the water heater. It is a method of protecting
the heater against freezing using the measurement of the return temperature of the heating medium
and it is possible to use it in quality control systems of the heater power (with a pump in a short
heater cycle).
B6 –supply air temperature at the outlet after heat recovery.
2.3.2 Connecting filter pressure switches
Pressure switches should be installed in a place enabling service access. The pressure setting should
correspond to the final pressure of the filter from the selection card. Make sure that the rubber tube
from the filter inlet is connected to the pressure switch stub marked "+" and from the outlet to "-".
The control cable should be connected to the normally closed contacts of the pressure switches.
2.3.3 Connection of damper actuators (intake, exhaust, recirculation, by-pass)
The VTS automatics use actuators powered with 24V (safe) voltage. In air handling units with a
mixing chamber, the intake, exhaust and recirculation damper actuators are controlled by a 0-10V
signal, common for all 3 dampers. In air handling units without a mixing chamber, the intake and
exhaust dampers are controlled by a 24V (ON / OFF) signal, common for these dampers. By-pass
damper actuators for plate heat exchangers and actuators for control valves are controlled by 0-10V
signals.

2.3.4 Connection of water heater antifreeze thermostat
The antifreeze thermostat is an optional protection of the water heater. It should be used with the
quantitative method of heater power control. In the case of qualitative control of the heater power,
the anti-freezing thermostat can be used in parallel or interchangeably with the recommended
method of measuring the heating medium return temperature.
The thermostat's capillary should be stretched over the largest possible surface of the heater on the
air outlet side. The thermostat must be installed in a place with service access. The temperature
setting should be between 3 and 5 degrees, with a hysteresis of 5 degrees.
The control cable must be connected to the thermostat normally closed contacts..
2.3.5 Connection of controls for electric pre-heater and re-heater
The electric heater can be used as a re-heater to heat the supply air to the required temperature or
as a pre-heater to protect the heat recovery exchanger against frosting - then it is installed in the
supply air track before the heat recovery exchanger and its task is to heat the air to a temperature of
about -5 ° C in the case of plate heat exchangers and to about -13 ° C in the case of rotary heat
exchangers.
Attention:
The electric heater is powered from an external source with a separate cable, regardless of the
automation option (see section 1.1.2 of this manual).
Options:
In compact and standard AHUs ordered with VTS automation, electric heaters are equipped with
modules of smooth power control with short-circuit protection of individual heater sections. Connect
the heater power control cable and the safety thermostat cable to the control panel terminal.
If the unit is ordered without automation, the scope of delivery includes a heater without a control
module and a short-circuit protection. These elements should be completed by the customer.
2.3.6 Connecting control for optional devices outside the VTS offer (condensing unit,
humidifier, etc.).
To control the operation of the cooling / heat sources supplying the Dx and DxH heat exchangers,
shielded cabling should be used, enabling the transmission of 2 potential-free signals + 0-10V signal
(start + H / C switch + 0-10V signal or start of 1 and 2 sections). A total of 6-wire cable with a
minimum cross-section of 0.5 mm2 at length up to 50 m). The analog signal can be scaled individually
to the needs of the aggregate (e.g. 0-10V heating / cooling; 0-5V cooling, 5-10V heating; etc.).
VTS automation can fully take over control of the humidification process, including the control of
maximum humidity in the supply channel. Optionally, the VTS automation can only provide a signal
confirming the operation of the unit, leaving the humidity control for the autonomous humidifier
automation.
2.4 Components with ModBUS communication
All components communicating with the controller via the ModBUS RTU protocol should be
connected into one common network and connected to the terminals marked as "RS-485 Master" in
the diagram (fig. 4 and fig. 5 of this manual). The "RS-485 -plan" port is not used. It is connected in
parallel with the RJ12 connector (HMI Advanced connection).

The ModBUS RTU protocol is also used for communication between the controller and expansion
boards, increasing the number of digital and analog inputs / outputs.
Fig. 7 shows the set of accessories with ModBUS communication, together with the addresses
assigned to them.
The addresses of fan motors depend on the type of unit and the number of fans installed in it. The
addresses given in the diagram refer to standard AHUs. In the case of units with FanWall type fans
(e.g. in Ventus Compact units), the addresses of individual fans will be different. Similarly to analogue
I / O, please refer to the diagram generated for the specific application code (supplied with the
control panel).)
All components that we want to connect to the ModBUS network must be set to the correct baud
rate, parity and stop bit compatible with this network. They must also have relevant parameters
assigned to the appropriate registers.
Therefore, it is recommended to use components recommended by VTS, factory prepared for
cooperation with this network.
Each of the components connected to the network should have in its controller an individual address
by which the control panel controller identifies it in the network. First, set the addresses of sensors
and transducers, then the inverters (if installed in the control panel) and finally the EC motors that
are programmed with the control panel controller. Detailed instructions for configuring addresses in
individual components are provided later in this documentation.
The addresses of the controller output and input extension modules and the addresses of fans
depend on their number and type of the AHU. Therefore, in order to identify them, refer to the
scheme generated individually for a specific application code, supplied together with the unit.
The addresses of pressure, humidity and CO2 transducers have fixed values assigned in the controller
and should not be changed.
The "Mainboard" module (Adr. 18) and the "I/O module" (Adr. 15) are not used in standard AHUs -
the option is available in selected regions and models. They were included in the specification (Fig. 7)
for information purposes only.

Fig. 7. Connecting accessories with ModBUS communication.

2.4.1 Wiring used for ModBUS communication
Use cabling in accordance with the ModBUS RTU protocol standard. It is recommended to use a
twisted pair shielded Li2YCY cable. Two wires will be used for communication, two to power the
transmitter or as a reserve. Starting from the uPC controller, common wiring should be routed from
component to component, avoiding as much as possible the „star” connection. If the control cabinet
is mounted right next to the control panel, the network is not very extensive and deviations from this
rule usually do not cause complications.
2.4.2 PCB EC extension module with ModBUS communication
The standard AHUs use the PCB EC output expansion module with fixed address No. 13 set in the
program of the controller. The controller functionality is set with microswitches and for the
application as the expansion module only the eighth switch should be in the „on” position, as shown
in Fig.8 .
Fig. 8. Location of microswitches in the PCB EC module.
2.4.3 Pressure transmitters with ModBUS communication
The pressure transducer should be installed in a way that allows later service access to the inside of
its housing. The method of connecting the hoses marked (+) and (-) on the transmitter housing is
shown in Fig. 9.
only the 8
microswitch is in
„on” position

Fig. 9. Connection of a pressure transducer (CAV function).
Addresses of pressure transducers offered by VTS are set with microswitches inside their housing.
The addresses of these components should be set before switching on the AHU supply voltage.
Both pressure transducers are delivered with factory set address No. 11, suitable for air supply. In the
transducer mounted in the exhaust section, the address should be changed from 11 to 12, as shown
in the figure below.
Fig. 10. Setting the pressure transducer addresses (CAV function).

2.4.4 Humidity transmitters with ModBUS communication
Addresses of humidity transducers offered by VTS are set with microswitches inside their casing. The
addresses of these components should be set before switching on the AHU supply voltage.
Both humidity transmitters are delivered with factory set address No. 31, suitable for air supply. In
the transducer mounted in the exhaust section, the address should be changed from 31 to 32, as
shown in the figure below.
Fig. 11. Setting the addresses of humidity transducers.
2.4.5 CO2 transmitter with ModBUS communication
The address of the CO2 transmitter, which is in the VTS offer, is set with microswitches inside its
housing. This address should be set before switching on the AHU supply voltage.
The correct CO2 transmitter address is 21.

Fig. 12. Setting the CO2 transmitter address
2.4.6 Inverters (frequency converters) with ModBUS communication (for fans and rotary heat
exchanger)
Inverters are programmed directly from their control panels, regardless of the AHU controller. The
inverters are factory set to the same default addresses, so to avoid conflict, the programming
process must be carried out individually for each of them, with ModBUS communication disabled.
The inverters are programmed in accordance with the instructions, where parameters which value
should be set are listed. Other parameters not listed in the table retain the factory default values and
should not be changed.
The I60 parameter is used to set the addresses of individual inverters. The correct values should be
confirmed on the individually generated scheme with the selection card.
Parameter H32 should be calculated according to the formula:
H32 = (1 –H31 * rotary speed/6000) * 50 Hz
Frq and I24 parameter settings are different for IC5 and IG5A inverters, which is why they are listed
in separate tables.

After programming the inverters, it will be required to configure communication in the AHU
controller. This operation should be performed after programming all other controller configuration
parameters. The procedure is described in this manual in chapter 4.7.2 for fans and in chapter 4.7.4
for rotary heat exchangers.
Parameter Code Value Comments
P5 input function I24 19 External emergency shut down - NC
Frequency setting method Frq 8 ModBUS-RTU communication
Parameter Code Value Comments
Frequency setting method Frq 7 ModBUS-RTU communication
Parameter Code Value Comments
Acceleration time ACC 45 reccomended value 45 sec
Deceleration time DEC 45 reccomended value 45 sec
Stop type F4 0 factory settings deceleration
Maximum work frequency F21 80 Hz
Nominal motor frequency F22 50 Hz
U/f characteristic type F30 1 square characteristic
Motor thermal protection F50 1 on
Number of motor poles* H31 * from 2 to 12
Nominal motor slip* H32 * 0.01 Hz default
Nominal motor current* H33 *
Motor current without load* H34 * 0.1 A default
Gain for speed display* H74 * 1 default
Control type Start/Stop Drv 3 RS 485 communication
Inverter adress I60 2 supply fan
3 exhaust fan
5 supply fan 2
6 exhaust fan 2
7 supply fan 3
8 exhaust fan 3
9 supply fan 4
10 exhaust fan 4
2 stop after characteristic
Control signal loss reaction I62
Waiting time after control signal loss I63 30 reccomended value 30 sec
IC5 inverter
IG5A inverter
LG inverter
Inverter adress
I60

2.4.7 EC motors of fan sets and rotary heat exchanger with ModBUS communication
The motors are factory set to the same ModBUS addresses, so to avoid address conflicts, they should
remain off until they are programmed. Configuring the operating parameters of EC motors is done in
the software via the AHU controller. So we have to become familiar with its operation. The
programming procedure is described in chapter 4.7.3 of this documentation.
3AHU operation - general information.
Current control panel operation is possible with one of two operator panels - HMI Basic or HMI
Advanced, or with visualization tools, factory implemented in the controller (function available as a
standard) or implemented using BMS (option - VTS provides variables to an external system that is
outside VTS offer).
The AHU operation options are presented in Fig. 13.
Fig. 13. Operating options of the VENTUS AHU controller.
The HMI Advanced panel additionally enables full service support, including changing all AHU
configuration parameters. In addition to the physical panel, connected directly to the controller, you
can use a virtual panel, available in the standard visualization, which can be displayed on a computer
or mobile device. The virtual panel plays the role of a remote desktop of the physical panel and is an
accurate representation of all its functions and information displayed on it.