Operator’s guide

1. ANNOTATION

This manual contains instructions for the operator on working with the ventilation system, describes its structural diagram, the logic of controlling the controllers and the operator panel, a list of actions is offered to find the causes of possible malfunctions and how to eliminate them.

CONTENT
1. ANNOTATION
2. APPOINTMENT OF THE PROGRAM
3. IMPLEMENTATION OF THE PROGRAM
3.1 Block diagram of ventilation system control
3.2 Description of the control cabinet
3.3 Description of control modes of the operator panel
3.4 Description of video frames
3.4.1. Video clip “Supply system P14”
3.4.2 Video frame “Exhaust system B14”
3.4.3. Video clip “Recirculation R14”
3.4.4. Video clip “Measurements P14”
3.4.5. Video clip “Measurements R14”
3.4.6. Video clip “Supply system P17”
3.4.7. Video frame “Exhaust system В29”
3.4.8 Video frame “Measurements P17”
3.4.9 Video block “Supply system P18”
3.4.11 Video frame “B30 Extraction System”
3.4.12 Video frame “Measurements P18”
3.4.13 Video frame “Measurements P18”
4. Description of the algorithm
5. Malfunctions
5.1 Malfunction of the frequency drive (PWM)
5.2 Malfunctions of sensors
5.3 Personnel actions in case of failure of the controller
5.4 Output of the automation cabinet from work
5. Procedure for testing the efficiency of the ventilation system
7. Change sheet

2. APPOINTMENT OF THE PROGRAM

The ventilation systems are controlled by motors, three-way valves of a hot water supply to the heating circuits and actuators of the dampers to ensure air exchange.
The visualization system provides on-board video display of the current information on the status of the installation, modes of operation, and also allows controlling ventilation.

3. IMPLEMENTATION OF THE PROGRAM

3.1 Block diagram of ventilation system control

Структурная схема с ИП320

Structured scheme with ИП320

Figure 1. Structural diagram of ventilation system control

In this structure, a hierarchical subordination scheme is implemented between the nodes and components that are part of the ventilation control system. Each of the three controllers provides control of the slave equipment, consisting of several frequency drives and several I / O modules. Each controller in turn reports to the IP320 panel, which is the master (network component) in this structure.

3.2 Description of the control cabinet

Шкаф

Figure 2. Video frame “Appearance of the control cabinet”

The control system was created taking into account the minimal need for maintenance. So, for example, when the voltage is restored after its falling in the network, the system is automatically initialized and put into operation, – ventilation is turned on and begins to regulate the temperature in the premises. The values ​​set before the voltage drops on the system controllers are set to the default values, all systems start to work in automatic mode.
In the central part of the cabinet is the operator panel IP320.
Inside the cabinet there are three OWEN PLCs and six I/O modules, frequency drives (frequency converters) are located in the frequency drive cabinet (located side by side).
3.3 Description of control modes of the operator panel
Each of the subsystems is controlled separately in the automatic mode.
Automatic mode is a mode in which operator participation is not required. The control loop stabilizes the value of the temperature TE3 (output temperature in the room) at the level set by the operator from the panel. The operator has the ability to turn on and off each of the subsystems, reduce or increase the set temperature.

3.4 Description of video frames
The human-machine interface system consists of twelve video frames that are designed to monitor the state and control of the ventilation system.
The composition and functionality of video frames is as follows:

1. Management of P14;
2. Management B14;
3. Control of R14;
4. Measurements of P14;
5. Measurements of R14;
6. Management P17;
7. Management B29;
8. Measurements P17;
9. Management of P18;
10. Management of the B30;
11. Measurements of P18;
12. Season change.


3.4.1. Video clip “Supply system P14”

П14

Figure 3. Video block “Supply system P14”

This video frame first appears on the screen after the system is turned on. Also, it can be called at any time by pressing ESC, the leftmost button on the panel in the bottom row.
This video frame is designed to turn on and off the supply system P14, change the speed of the induction motor, indicate the status of the supply system, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed showing the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
When pressing the “1” button in the right panel, the starting sequence of the supply system P14 starts.
When pressing the button “2” – starting the sequence of shutdown of the supply system P14.When the button “3” is pressed, the operator confirms the current violation.

3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.
List of possible states:
“Disabled”: indicates that the system does not work, the fans are off, the gate is closed, the hot water valve is closed.
“Winter / summer”: appears at start-up, means that the system checks whether heating is necessary.
“Preheat start”: indicates that the system pre-warms the radiator.
“Valve 100%”: means that the control valve is 100% open.
“On. Pump “: appears when the DHW pump is acknowledged.
“Warmed up?”: This message occurs during the system evaluation of the heatsink warm-up level at start-up.
“Zasl. Open “: indicates that the gate opens.
“Actuators on”: means that both fans on the supply and exhaust ducts are switched on.
“Season Selection”: this message occurs during the system evaluation of the need to enter the temperature control mode.
“All disconnect”: means that the equipment is shutting down.
“Adjustment T”: means that the system operates according to the PID law.
“Without regulation”: means that the system supplies air to the room without warming up.
“Defrosting”: means that the heatsink protection algorithm is implemented from damage.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.
3.4.2 Video frame “Exhaust system B14”

B14Figure 4. Video frame “Extraction system B14”

This video frame is designed to turn on and off the exhaust system B14, change the speed of the induction motor, display the state of the exhaust system, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed showing the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
Pressing the “1” button in the right panel starts the start sequence of the exhaust system B14.
Pressing the “2” button – starts the sequence of shutdown of the exhaust system B14.
When the button “3” is pressed, the operator confirms the current violation.
3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.
List of possible states:
“Enabled”: means that the system draws air from the room.

Disabled”: indicates that the exhaust system does not work, the fan is off, the gate is closed.
“Fault”: indicates that a problem with the motor has been diagnosed.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.

3.4.3. Video clip “Recirculation R14”

R14Figure 5. Video frame “R14 Recirculation”

This video frame is designed to turn on and off the recirculation system R14, change the speed of the induction motor, indicate the status of the recirculation system R14, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed, which indicates the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
Pressing the “1” button in the right panel starts the start sequence of the recirculation system R14.
Pressing button “2” starts the sequence of the recirculation system R14.
When the button “3” is pressed, the operator confirms the current violation.
3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.
List of possible states:
“Enabled”: means that the system draws air from the room.
“Disabled”: indicates that the recirculation system is not working, the fan is off, the gate is closed.

“Fault”: indicates that a problem with the motor has been diagnosed.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.

3.4.4. Video clip “Measurements P14”

ИзП14

Figure 6. Video frame “Measurements P14”

This video frame is designed to measure and control the temperature of the air supplied to the room.
SP_TE1: The set value of the outdoor temperature. Used for the seasonal winter-summer transition.
SP_TE2: set the return water temperature. Used to protect the circuit from freezing during the cold season.
SP_TE3: set the temperature of the air supplied to the room.
TE1: actual value of outdoor temperature.
TE2: The actual value of the return water temperature.
TE3: actual value of the air temperature delivered to the room.
3.4.5. Video clip “Measurements R14”

ИзR14

Figure 7. Video frame “Measurements R14”

This video frame is designed to measure the temperature in the air recirculation zone.
SP_TE4: set temperature in the air recirculation zone.
TE4: actual temperature value in the air recirculation zone.

3.4.6. Video clip “Supply system P17”

П17

Figure 8. Video frame “Supply system P17”

This video frame is designed to turn on and off the supply system P17, change the speed of the asynchronous motor, indicate the status of the supply system, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed showing the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
When you press the “1” button in the right panel, the start sequence of the supply air system P17 starts.
When pressing the button “2” – starting the sequence of disconnection of the supply system P17.
When the button “3” is pressed, the operator confirms the current violation.
3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.

 

List of possible states:
“Disabled”: indicates that the system does not work, the fans are off, the gate is closed, the hot water valve is closed.
“Winter / summer”: appears at start-up, means that the system checks whether heating is necessary.
“Preheat start”: indicates that the system pre-warms the radiator.
“Valve 100%”: means that the control valve is 100% open.
“On. Pump “: appears when the DHW pump is acknowledged.
“Warmed up?”: This message occurs during the system evaluation of the heatsink warm-up level at start-up.
“Zasl. Open “: indicates that the gate opens.
“Actuators on”: means that both fans on the supply and exhaust ducts are switched on.
“Season Selection”: this message occurs during the system evaluation of the need to enter the temperature control mode.
“All disconnect”: means that the equipment is shutting down.
“Adjustment T”: means that the system operates according to the PID law.
“Without regulation”: means that the system supplies air to the room without warming up.
“Defrosting”: means that the heatsink protection algorithm is implemented from damage.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.

3.4.7. Video frame “Exhaust system В29”

B29Figure 9. Video frame “Extraction system В29”

This video frame is designed to turn on and off the exhaust system B29, change the speed of the induction motor, indicate the state of the exhaust system, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed showing the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
Pressing the “1” button on the right side panel starts the start sequence of the exhaust system B29.
Pressing button “2” – starting the sequence of switching off the exhaust system B29.
When the button “3” is pressed, the operator confirms the current violation.
3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.
List of possible states:
“Enabled”: means that the system draws air from the room.

“Disabled”: indicates that the exhaust system does not work, the fan is off, the gate is closed.
“Fault”: indicates that a problem with the motor has been diagnosed.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.
3.4.8 Video frame “Measurements P17”

ИзП17

Figure 10. Video frame “Measurements P17”

This video frame is designed to measure and control the temperature of the air supplied to the room.
SP_TE1: The set value of the outdoor temperature. Used for the seasonal winter-summer transition.
SP_TE2: set the return water temperature. Used to protect the circuit from freezing during the cold season.
SP_TE3: set the temperature of the air supplied to the room.
TE1: actual value of outdoor temperature.
TE2: The actual value of the return water temperature.
TE3: actual value of the air temperature delivered to the room.
3.4.9 Video block “Supply system P18”

Figure 11. Video block “Supply system P18”

This video frame is designed to turn on and off the supply system P18, change the speed of the asynchronous motor, indicate the status of the supply system, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed showing the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.

Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
Pressing the “1” button in the right panel starts the start sequence of the supply air system P18.
When pressing the button “2” – starting the sequence of shutdown of the supply system P18.
When the button “3” is pressed, the operator confirms the current violation.
3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.
List of possible states:
“Disabled”: indicates that the system does not work, the fans are off, the gate is closed, the hot water valve is closed.
“Winter / summer”: appears at start-up, means that the system checks whether heating is necessary.
“Preheat start”: indicates that the system pre-warms the radiator.
“Valve 100%”: means that the control valve is 100% open.
“On. Pump “: appears when the DHW pump is acknowledged.
“Warmed up?”: This message occurs during the system evaluation of the heatsink warm-up level at start-up.
“Zasl. Open “: indicates that the gate opens.
“Actuators on”: means that both fans on the supply and exhaust ducts are switched on.
“Season Selection”: this message occurs during the system evaluation of the need to enter the temperature control mode.
“All disconnect”: means that the equipment is shutting down.

“Adjustment T”: means that the system operates according to the PID law.
“Without regulation”: means that the system supplies air to the room without warming up.
“Defrosting”: means that the heatsink protection algorithm is implemented from damage.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.

3.4.10 Video frame “Extraction system B30”

B30Figure 12. Video frame “Extraction system B30”

This video frame is designed to turn on and off the exhaust system B30, change the speed of the induction motor, display the state of the exhaust system, display of emergency events.
1. The names of the subsystems are located at the top of the screen.
In the right upper part of the video frame, a “running number” is displayed showing the operability of digital communication with the controller, and also confirms the operability of the controller. If this value does not change, this may be a symptom of a controller malfunction or communication with it.
2. In the middle of the screen there are hints to the control buttons.
The system is controlled by pressing the buttons of the panel on the right.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.
When you press the “1” button in the right panel, the start sequence of the exhaust system B30 starts.
Pressing button “2” – starting the sequence of switching off the exhaust system B30.
When the button “3” is pressed, the operator confirms the current violation.
3. At the bottom of the screen, dynamically changing fields are displayed showing the system status and violations.

List of possible states:
“Enabled”: means that the system draws air from the room.
“Disabled”: indicates that the exhaust system does not work, the fan is off, the gate is closed.
“Fault”: indicates that a problem with the motor has been diagnosed.
Attention: the transition from one video frame to another is performed using the buttons and located on the panel in the bottom row.
3.4.11 Video frame “Measurements P18”

ИзП18

Figure 13. Video frame “Measurements P18”

This video frame is designed to measure and control the temperature of the air supplied to the room.
SP_TE1: The set value of the outdoor temperature. Used for the seasonal winter-summer transition.
SP_TE2: set the return water temperature. Used to protect the circuit from freezing during the cold season.
SP_TE3: set the temperature of the air supplied to the room.
TE1: actual value of outdoor temperature.
TE2: The actual value of the return water temperature.
TE3: actual value of the air temperature delivered to the room.
3.4.12 Seasonal video snapshot

Сезон

Figure 14. Video clip “Measurements of the season”

This video frame is designed to adjust the seasonality settings of ventilation systems.
On the left is the condition, in which season the ventilation system for the supply systems 14, 17 and 18 is located.
On the right are the seasons and the commands for switching them.
In order to change the season for the supply system 14 for the summer, it is necessary to press the button “1” in the panel on the right, for the winter – the button “2”.
To change the season for the supply system 17 for the summer, it is necessary to press the button “3” in the panel on the right, for the winter – the button “4”.
To change the season for the supply system 18 for the summer, it is necessary to press the button “5” in the panel on the right, for the winter – the button “6”.
Attention: the panel does not have the touchscreen function. Use the number buttons to give commands, according to the prompts.

4. Description of the algorithm

 

Алгоритм

Figure 15. Graphical description of the work algorithm
The ventilation system is controlled in accordance with the graphic description shown above.

5. Malfunctions
This section describes the likely malfunctions of the system or its parts, the causes and solutions.
5.1 Malfunction of the frequency drive (PWM)

Faults in the frequency drives are due to malfunction of the fan drives. The probability of false alarms is unlikely. The error data display is displayed on the front panel of the frequency inverter (frequency drives) inside the frequency drive cabinet.
5.2 Malfunctions of sensors
The controller analyzes the quality of the received data from temperature sensors and pressure sensors. In the event of sensor failure due to the output of data beyond the measuring range (sensor open or short, sensor fault), the sensor values ​​on the panel will be set to “1.11”.
5.3 Personnel actions in case of failure of the controller
1. Unscrew the covers of the drives of the regulators and remove the first blue wire, pre-insulated it. This will ensure that the power supply to the drive is interrupted. After this, the handle of the drive must be unscrewed to the desired degree of opening.
2. Open the cabinet with frequency drives, insert the front panel for each frequency drive and put the drives in the “stop” state.
3. Activate the drives in manual mode.
4. Check the direction of rotation of the drives.
5.4 Output of the automation cabinet from work
If it is necessary to turn off all ventilation subsystems, it is necessary to disconnect the power supply of each controller.

5. Procedure for testing the efficiency of the ventilation system

1. Switch on the air handling unit and make sure that air is drawn from the supply air ducts, and drawn into the exhaust air ducts.
2. Check the tactile sensations (feel) that there are hot water in the pipes that are connected to the ventilation system.
3. Make sure that the system is turned on and working (“Adjustment T” state).
4. Set the value of SP_TE3 to the maximum limit of 25 C and wait until the TE3 starts to increase to the set value. If this does not happen, then either the controller is faulty or there is a problem with the water supply to the coolant supply circuit.
5. With the system running, disconnect the TE2 temperature sensor from the hot water pipe. When cooling down, the sensor should stop the system and put it into defrost mode.
6. Check the operation of the capillary defrost sensor. To do this, unscrew the temperature adjustment screw to the maximum clockwise. In this case, the sensor must be activated and the defrosting mode must be reached.
In the defrosting mode, the supply fan is turned off (the exhaust fan remains in operation), the pump starts, the valve opens 100%.

#Operator, #guide, #malfunction, #fan, #drives

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