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VTS Ventus VVS300 [22/47] Functions
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uPC3 – rel 1.8 – 11/2021
22
6. FUNCTIONS
6.1 On request
The On status requires the AND logic of:
Unit configured by Service
No serious alarm
On by digital input
On by the OR of the following conditions:
o On by pGD
o On by BMS
o On by HMI Basic, if present
o On by scheduler, if enabled
Variable mode is shared with all the control sources
If any condition go to OFF, the uni twill turn OFF.
6.2 Start/Stop sequence
When the unit is turned ON by a previous condition
the sequence to start will be enabled.
The start sequence is divided into the following
steps:
1. The external temperature is checked.
2. If the external temperature is lower than
antifreeze setpoint, the heating devices
after recovery, will be activated in 60s at
power determined by the graph below:
3. The heating power will be kept for a certain
time determined by the following graph:
4. In case of external temperature greater
than antifreeze setpoint or after the
antifreeze sequence timer, the damper can
be opened.
5. After 30s the fan can start and devices can
regulate. If heating devices are in
regulation mode from antifreeze condition,
the release of manual mode should not
cause a peack on the heating outputs.
When the fans start to regulate, another sequence
will start, described below:
When the unit is turned OFF, the fans will be kept
at the previous power and after a settable time they
can be turned OFF.
6.3 Cooling/Heating changeover
The external and room/return temperatures are
considered: if the external temperature is lower
than a minimum threshold or greater than a upper
threshold the heating or cooling mode can be
forced:
In the middle, between the heating and cooling
external temperature thresholds, or when the
external temperature probe isn’t available the
heating or cooling mode will be decided
considering the room temperature or the return
temperature (if the probes are available), here
below it is represented the behaviour in case of
room temperature:
External temp.
Start power
Max
Min
Low
High
External temp.
Time
Max
Min
Low
High
Fans
Supply
Exhaust
ON
ON
delay
ON
delay
Idle time
Idle time
Fans
Supply
Exhaust
OFF
OFF
delay
OFF delay
External temp.
Cooling
Heating
Based on
room temp.
Содержание
- Software for air handling units 1 19 1
- Ventilation vts 1
- Introduction 4
- Main features 4
- Field connections 5
- Start up 6
- I o configuration 8
- Installation 8
- All sensor temperature with additional b6 after recovery on supply 10
- Cav regulation for fan 10
- Compact suspended floor rrg unit with built in compact suspended floor rrg unit with built in automation standard equipped with an 10
- Expansion module i o 10
- Expansion module i o mainboard control circuit 10
- Humidity return sensor 10
- Standard elements for all units 10
- Standard input output for function 10
- Supply 24v 10
- Ventus cbx controlbox automation standard ventus cbx controlbox automation standard equipped with an expansion module i o pcb ec 10
- Adjustable switching level individual sections 11
- Adjustable switching level of individual sections 11
- Dx cooler c_dx control pid controller cooling 11
- Electric heater he control pid controller heating 11
- Fan v control standard work percentage control 11
- Filters f control compact pressure transducer 11
- Limiting the minimum maximum signal 11
- Limiting the minimum signal 11
- Low air temperature alarm 11
- Pid control for regulation cav 11
- Pid control for regulation vav 11
- Pid controller cooling recovery 11
- Pid controller protecting the rebate sensor 11
- Recovery plate cross hex p control pid controller heat recovery 11
- Ventus pressure switch 11
- Water cooler c_cw control pid controller cooling 11
- Water heater h_cw control pid controller heating 11
- Adjustable switching level of individual sections 12
- Dxh reverse c_dxh control pid controller heating 12
- Humidifier w control pid controller humidity 12
- Limiting the minimum maximum signal 12
- Limiting the minimum signal 12
- Mixing chamber m control pid controller heating 12
- Pid co2 controller 12
- Pid controller compensation for supply air humidity 12
- Pid controller cooling 12
- Pid controller cooling recovery 12
- Recovery glycol g control pid controller heat recovery 12
- Recovery rotary r control pid controller heat recovery 12
- Redundant fan the fan section contains doubled fans motors and inverters one fan is working the other is a reserve in the event of a failure in addition the operating hours counters decide on routine switching between the fans so that the load and wear of both units is uniform when switching from one fan to another there is a gap to adjust the position of the dampers directing the air flow 12
- Addtitonal temp sensor 13
- Preheater control pid controller heating 13
- Reheater control pid controller heating 13
- Application code 14
- Modbus devices 14
- Unit configuration 14
- Additional settings for the control circuit module on the screens 16
- Command type data type addr 16
- Hmi advanced menu other j03 hmi advanced menu other j03 the menu from which we activate individual extension modules 16
- Holdingregister int 0 16
- Holdingregister int 1 16
- Holdingregister int 2 16
- Holdingregister int 3 16
- I r input register h r holding register 16
- Important information when using an external humidity transducer turn off the measurement on the control circuit board hmi advanced menu other j03 j04 co2 sensor 16
- Important information when using an external pressure transducer turn off the measurement on the control circuit board hmi advanced menu other j03 j04 humidity sensor 16
- Inputregister int 0 16
- Inputregister int 1 16
- Inputregister int 2 16
- Inputregister int 3 16
- Module i o 16
- Pressure sensor pressure sensor 16
- Vts mainboard control circuit 16
- Vts pcb ec 17
- Display hmi advanced 18
- User interface 18
- User menu 18
- Ability to edit some of them for more information on the parameters that can be changed see the parameters table default password 0001 20
- Access the main menu 20
- Advanced user maintenance read only access 20
- Attention there are two options for the calendar program details in the chapters on the calendar and service menu 20
- Attention to change the temperature setpoints attention to change the temperature setpoints simply turn the knob 20
- Clock button entering the auto mode the driver will work according to the schedule from the calendar settings 20
- Default password 0002 20
- Display hmi basic 20
- Fan button setting the fan speed 20
- First letter second letter n 20
- Hmi basic also has a built in clock with support for time schedules 20
- If a given day is not defined as special but is in a special period then the mode for the special period is implemented 20
- If both of these do not occur the basic schedule is implemented 20
- Implementation of the schedule considering the priorities of time schedule settings the order of their implementation is as follows the first special day settings are those with the highest priority the other settings are then ignored 20
- In the parameters screen the access needed to edit in the parameters screen the access needed to edit the parameters is shown always with the same codes an example follows 20
- Lcd display indicates the actual temperature in the room or on the main control sensor and the selected setpoint operating mode fan speed time and day of the week 20
- Manufacturer read write access to all parameters 20
- Menu description 20
- On off button switch between on off status forces the control panel to stop or enables selection of the operating mode 20
- Once the password is entered it will be maintained for 5 minutes from the last time a key was pressed and then the password will need to be re entered in order to access the parameters of the advanced functions in the log out menu the password can be force entered without waiting 5 minutes 20
- Password management 20
- Regardless of the displayed screen pressing the programming key accesses the password entry screen which allows access to the main menu shown below the code of the mask is determined by the menu tree 20
- Rotary button change of settings by turning accepting new values by pressing 20
- Service read access to all parameters with the 20
- The basic interface with built in temperature sensor the basic interface with built in temperature sensor 20
- The program has 3 different password levels the program has 3 different password levels 20
- To all parameters default password 0000 20
- User setpoint 21
- Cooling heating changeover 22
- Functions 22
- On request 22
- Start stop sequence 22
- Fresh air regulation 23
- Temperature regulation strategy 23
- Devices activation 24
- Humidity regulation 24
- Antifreeze management 25
- Fans control 26
- Minor functions 27
- Mixing chamber control 27
- Regulation 27
- Supervisor 29
- Alarms 30
- Alarms interface 30
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