VENTUS RHE DRIVE - Installation and Operation Manual
Version 1.4 (06.2025)
Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the VENTUS RHE DRIVE, a rotary heat exchanger drive system. It is crucial to read and understand this document before proceeding with any installation or operational tasks. The manual is intended for use by qualified installers and service technicians.
Safety Precautions
General Safety:
- Always read the documentation carefully before installation, maintenance, and operation.
- Contact official VTS support if you have any doubts.
- Installation and operation must be performed by qualified personnel in accordance with national electrical installation standards.
- Failure to follow instructions may result in property damage or personal injury.
- Keep this manual in an easily accessible place for future reference.
Electrical Safety:
- All electrical work must be performed by a licensed electrician with appropriate qualifications.
- Disconnect and secure the power supply before performing any work.
- Never open or remove the motor while the unit is powered.
- Ensure the supply voltage matches the information on the nameplate.
- Use a dedicated circuit and a lockable main switch.
- Improper wiring or installation can cause fire or electric shock.
- Ensure proper grounding and protection according to local and national standards.
Mechanical Safety:
- Be aware of hot surfaces and sharp edges within the unit.
- Allow components to cool down before servicing.
- Do not operate the unit with inspection panels open.
- Wait at least 4 minutes after switching off the unit before opening inspection panels to allow moving parts to stop.
Warning Symbols:
- ! (Warning): Indicates issues that may cause risk. Read carefully and follow instructions.
- ! OSTRZEŻENIE (Caution): Non-compliance may cause minor injuries or product damage.
- ! NIEBEZPIECZEŃSTWO (Danger): Non-compliance may cause serious injury or death.
Product Description and Specifications
The VENTUS RHE DRIVE is designed for rotary heat exchangers and is available with three different stepper motor configurations to meet various customer needs:
Stepper Motor Configurations:
| Motor Torque | Power | Weight | Dimensions (W x H x D) | Shaft Diameter |
|---|---|---|---|---|
| 2.0 Nm | 55 W | ≈ 2.4 kg | 85 x 85 x 67 mm | 12 mm |
| 4.0 Nm | 110 W | ≈ 3.5 kg | 85 x 85 x 97 mm | 12 mm |
| 8.0 Nm | 260 W | ≈ 5.0 kg | 85 x 85 x 156 mm | 12 mm |
Technical Specifications Summary:
| Parameter | 2.0 Nm Motor | 4.0 Nm Motor | 8.0 Nm Motor |
|---|---|---|---|
| Torque | 2.0 Nm | 4.0 Nm | 8.0 Nm |
| Index | 7-1-0005-0082 | 7-1-0002-0083 | 7-1-0005-0084 |
| Phases | 1 | 1 | 1 |
| Supply Voltage | 208-240 V | 208-240 V | 208-240 V |
| Stepper Motor Voltage | 3 x 0-200 V | 3 x 0-200 V | 3 x 0-200 V |
| Speed | 0-400 | 0-400 | 0-400 |
| Supply Frequency | 50 Hz | 50 Hz | 50 Hz |
| Power (250 RPM) | 55 W | 110 W | 260 W |
| IP Rating | 54 | 54 | 54 |
| Operating Temperature | -40°C to +40°C | -40°C to +70°C | -40°C to +40°C |
| Storage Temperature | -40°C to +70°C | -40°C to +70°C | -40°C to +70°C |
| Dimensions (W x H x D) | 85 x 85 x 67 mm | 85 x 85 x 97 mm | 85 x 85 x 156 mm |
| Shaft Diameter | 12 mm | 12 mm | 12 mm |
| Electrical Connections | 4-pole Tyco MATE-N-LOK | 4-pole Tyco MATE-N-LOK | 4-pole Tyco MATE-N-LOK |
Installation
2.1 Mounting and Installation
The following diagrams and instructions illustrate the correct mounting of stepper motors and controllers to the housing of the rotary heat exchanger. Ensure that the pulley is securely attached to the motor shaft.
Important Notes:
- Do not change the drive configuration. Follow the initially selected configuration.
- Improper mechanical installation can lead to error alerts.
- Ensure the stepper motor is securely fastened using the dedicated bracket.
- The stepper motor must be grounded.
- Use only the cables and connectors supplied with the motor and controller.
- Do not change the pulley size; optimal sizes are calculated for desired performance.
- Install the controller correctly to avoid overheating. Avoid direct sunlight exposure.
- Check the motor and controller nameplates to confirm electrical configuration.
2.2 Connections and Wiring
The stepper motors are connected and powered via the controller responsible for basic operating parameters. The motor is equipped with a male connector.
Wiring Diagram:
A diagram shows the connection of the power supply to the controller and the motor. The controller requires a 230V AC supply. Cables should be routed through dedicated cable glands.
Controller Terminal Description:
| No. | Description |
|---|---|
| 1 | Test Button |
| 2 | 4-position DIP switch |
| 3 | LED Indicator |
| 4 | Display (not used in basic VTS automation) |
| 5 | RJ12 Modbus Connector (2 x RJ12) |
| 6 | Control and signal connectors (analog/digital) |
| 7 | Power connectors (L, N, PE) |
| 8 | Stepper motor connection connectors (U, V, W, PE) |
Wiring Details:
- The controller has spring-loaded terminals for easy connection.
- Ensure the wire length for the motor cables is appropriate. Extension cables are provided.
- When disconnecting power, wait at least 5 minutes before opening the controller housing.
2.3 Controller Elements
2.3.1 Test Button
The controller features a test button for activating test functions. The button's function depends on the press duration:
- Short press (< 1 sec): Enters test mode, motor runs from 0 to 100 RPM.
- Press and hold: Enters test mode, motor runs at 100 RPM until released.
- Pressing for over 20 seconds may initiate internal calibration.
2.3.2 DIP Switch
A 4-position DIP switch is used to set the stepper motor size and maximum speed. The factory settings are optimized and should not be changed.
| Setting | DIP1 | DIP2 |
|---|---|---|
| Stepper Motor = 2Nm | Off | Off |
| Stepper Motor = 4Nm | On | Off |
| Stepper Motor = 8Nm | Off | On |
| Setting | DIP3 | DIP4 |
|---|---|---|
| Max Speed = 250 | Off | Off |
| Max Speed = 200 | On | Off |
| Max Speed = 170 | Off | On |
| Max Speed = 150 | On | On |
2.3.3 LED Indicator
The controller has an LED indicator with the following states:
- Off: No power.
- Solid Green: Power is present.
- Flashing Green: Correct Modbus communication.
- Solid Red: Rotor stopped due to critical alarm.
- Flashing Red: Operation at reduced power.
- Solid Amber: Test function active.
- Flashing Amber: Cleaning function active.
2.4 Modbus Control
Modbus communication can be connected via RJ12 connectors or spring-loaded terminals. Use a 6-wire, unshielded telecommunication cable (30 AWG / 0.066 mm²) for RJ12 connections.
Modbus Registers:
The manual details various Modbus registers for controlling and monitoring the drive, including:
- Coil Status: Motor ON/OFF, Reset Alarms, Motor direction, etc.
- Input Status: Voltage, current, temperature, phase loss, communication errors, etc.
- Input Registers: Motor speed, temperature, current, power, voltage, etc.
- Holding Registers: Setpoint, operation mode, motor parameters, etc.
Modbus Communication Setup:
- To switch from 0-10Vdc control to Modbus RTU, set 'Operation Mode' to 2.
- Save the desired speed percentage in the 'Set Point' parameter.
2.5 Adapting the RRG OI Controller for VTS AHUs
To adapt a new RRG OI controller for VTS central units:
- Connect to the RRG controller using a USB-RS485 converter and PC software for Modbus communication.
- Default communication parameters: Address 79, Baudrate 38400, no parity, 2 stop bits.
- Set Holding Registers (13-16) according to the uPC3 controller's parameters (Address 4, Baudrate 9600, no parity, 1 stop bit).
- Access to settings registers is without a password.
- Ensure the RRG motor type selected in the uPC3 configuration matches the controller's setting.
2.6 Drive Unit with AC Motor
The drive unit is responsible for starting and controlling the heat exchanger's rotational speed, typically between 3 and 10 RPM (up to 20 RPM for Enthalpy TOTAL exchangers).
The drive unit includes:
- Rotor drive belt transmission.
- Gearmotor - motor coupled with a reduction gear.
- Frequency converter.
Operating Parameters:
- TN system.
- Supply voltage: 1x(200-230)V ±10%.
- Nominal frequency: 50-60 Hz ±5%.
- Operating temperature: -30°C to +50°C.
- EMC environment: Class 1.
- Enclosure protection: IP54.
Basic Drive Unit Data:
| Description | Value | Notes |
|---|---|---|
| Model (Motor) | AC M7 1B4 TERM | |
| Nominal Power (Pn) | 0.37 kW | |
| Voltage (Un) | 3x230V AC | |
| Current (In) | 2.1 A | |
| Model (VFD) | LSLV0004M100-1EOFNA | Requires "Advanced I/O" |
| Voltage (Primary side) | 1x230V AC | |
| Current (Primary side) | 5.5 A | |
| Current (Secondary side) | 2.5 A | |
| f min | 17 | |
| f max | 53 |
2.7 Drive Unit with EC Motor
2.7.1 Installation and Configuration with EC Controller
VTS controllers are designed for direct connection of the drive unit. They include necessary protection and terminals for power and control.
If an HMI Advanced interface is used, parameter configuration can be done automatically via the 'Advanced' settings.
Refer to the controller's electrical diagram for power connection and the automation application schematic for communication line connection.
2.7.2 Modbus RTU/RS485 Parameters for EC Controller
The manual lists Modbus parameters for the EC controller, including:
- Coil Status: Motor ON/OFF, Reset Controller.
- Discrete Input Status: Voltage, current, temperature, phase loss, motor faults, etc.
2.7.3 Speed Control via Modbus
To switch from 0-10Vdc control to Modbus RTU:
- Set the 'Operation Mode' parameter to 2.
- Save the desired speed percentage in the 'Set Point' parameter.
Example:
- Set_Point < 1000 (10.00%): Motor stopped.
- Set_Point = 1000 (10.00%): Motor runs at minimum speed.
- 1000 (10.00%) < Set_Point <= 10000 (100.00%): Motor runs at the set speed.
The motor speed is calculated using the formula:
Speed[RPM] = RPM_Min + ((RPM_Max - RPM_Min) / 9000) * Set_Point[%]
Cable Specifications
The manual provides specifications for various cables:
- Power Supply Cable (3x1.5mm²): Multi-core, copper conductors, PVC insulation. Rated for 450/750V, -40 to 70°C.
- Control Circuit Cables (1x1mm² or 2x1mm²): Copper conductors, shielded, PVC insulation. Rated for 300/500V, -40 to 70°C.
- Communication Cable (UTP or STP, 2x2x24 AWG): Multi-core copper conductors, PVC or PE insulation, twisted pairs for interference reduction. UTP type has additional shielding. Rated for -20 to 60°C.
Cable cross-sections are selected for long-term current carrying capacity. Verify power cable cross-sections based on protection devices, cable length, and installation method.
