Bosch Air Center Control ACC MT

1. Safety Information

This section details safety symbols and general safety warnings. Signal words like PERICOLO (Danger), AVVERTENZA (Warning), ATTENZIONE (Caution), and AVVISO (Notice) indicate the severity of potential consequences from not following safety measures.

• PERICOLO: Indicates severe or fatal injuries to persons.
• AVVERTENZA: Indicates severe to fatal injuries to persons.
• ATTENZIONE: Indicates minor to moderate injuries to persons.
• AVVISO: Indicates damage to property.
• Important information not posing a risk to persons or property is marked with an info symbol (?).

General safety warnings emphasize that the ACC MT central control unit is designed to prevent hazardous conditions for users and the environment. Installation is intended for trained technicians in air conditioning, electrical, and heating sectors. It is crucial to read all manuals, adhere to safety warnings, and comply with national and local regulations.

Electrical Work: Electrical work must be performed by qualified personnel. Ensure the main power supply is completely disconnected (all poles) and secured against accidental reconnection before starting any electrical work. Verify that no voltage is present.

Proper Use: The product is exclusively for regulating VRF Air Flux/MDCI air conditioning systems (VRF = Variable Refrigerant Flow). Any damages resulting from misuse are excluded from warranty.

2. Product Description

The Air Flux product series is an air conditioning system for commercial buildings such as offices, hotels, and residential complexes. The Air Center Control ACC MT is the central control unit for VRF air conditioning systems.

2.1 Description of the Product: The ACC MT central control unit with touchscreen display plays a central role in controlling the air conditioning system. It is designed for professional users in the air conditioning sector who are authorized to make in-depth system settings.

The central control can manage up to 32 outdoor units or 64 indoor units (or other units like ERV, AF-HB, AHU KIT) via XYE communication cables. With an optional expansion card, it can control up to 128 outdoor units with up to 256 indoor units via four XYE cables. Communication between units uses the PQE protocol.

User roles for the central control unit include:

• User: Basic control of single indoor units or groups.
• Expert: Advanced functions like grouping units, user management, and scheduling.
• Administrator: Full control and user authorization management.

The central control unit can be connected to a PC via a local area network (LAN). It can also integrate with third-party building management systems via Modbus/TCP. Other interfaces allow connections to fire alarm systems or emergency lighting.

2.2 Compatible VRF System Components: The central controller is compatible with:

• Air Flux AF 5300 outdoor units
• Air Flux AF 6300 outdoor units
• Air Flux indoor units
• VRF mechanical ventilation units
• HT Hydro Box AF-HB
• Air Flux AHU KIT
• AC EXP expansion card for central controller
• Room thermostats with VRF ARC C-1/H-1 cable
• ARC C IR infrared remote control
• MDCI outdoor units
• AC-CM adapter

2.3 Scope of Delivery: The package includes the central control unit with touchscreen, wall mount bracket, power supply with country-specific adapter, installation instructions, I/O digital connector, XYE connector, power supply connector, cable entry grommets, and a USB stick with Open Source information.

2.4 Status LED Indicator: The LED on the front indicates the operating status:

• Solid White: No malfunctions, startup procedure complete.
• Flashing White: Startup procedure in progress.
• Solid Red: System malfunction (details on display), unit is operational.
• Flashing Red: Central control unit malfunction.

2.5 Dimensions: The unit dimensions are 271 x 188 x 42 mm.

2.6 Connections and Service Elements:

• 2.6.1 Rear Connections (without AC EXP): Includes Micro-SD slot, XYE 1, Digital I/O, Reset button, Ethernet 1 (PoE+ WAN + LAN), DC power input, and mounting screw.
• 2.6.2 Reset to Factory Settings: Press and hold the Reset button for approximately 5 seconds until the LED flashes. Briefly release and press again for 5 seconds. The LED will turn solid, indicating factory settings are restored.
• 2.6.3 Rear Connections (AC EXP only): Includes Analog I/O, Ethernet 2 (Modbus/TCP), XYE 2, XYE 3, XYE 4, and Modbus/RTU.
• 2.6.4 Top View Connections: Shows various ports including Modbus, XYE (4, 3, 2), Digital Out, Digital In, LAN 1 (DC 24V, PoE+), and Analog.
• 2.6.5 Right Side Connections: Features a reset button and a USB interface.
• 2.6.6 Network Connection: Instructions for connecting the power cable with ferrite.
• 2.6.7 Power Connection (Product Code 8733502082): Details on wrapping the power cable around the ferrite and connecting it.

2.7 Technical Data: Provides specifications such as device name (Air Center Control ACC MT), construction, weight, dimensions, power supply, current consumption, display type, connections, protection rating (IP30), operating conditions, transport and storage conditions, SELV voltage, impulse voltage, and software category.

3. Installation

3.1 Preparations Before Installation:

• The central controller is a standalone unit designed for wall mounting on a flat surface.
• 3.1.1 Installation Location: Do not install above 2000m altitude. Install indoors only. Ensure good ventilation. Avoid humid locations and areas with conductive dirt (pollution degree 2). Keep away from heat sources and direct sunlight. Do not cover ventilation openings.
• 3.1.2 Cable Entry Grommet (Optional): Instructions for installing the cable entry grommet, which is necessary if using a cable duct. If using an expansion card, both cable entries require grommets or cable glands.
• 3.1.3 Installing the AC EXP Expansion Card (Optional): Instructions for inserting the expansion card and its protective cover. Caution against over-tightening screws.
• 3.1.4 Cable Specifications: Details on cable types, specifications, and maximum lengths for various connections (DCin, Ethernet, XYE, Digital I/O, Analog I/O).

3.2 Installation Types:

• Surface mounting without cable duct.
• Surface mounting with cable duct.

3.2.1 Surface Mounting without Cable Duct: Instructions for installing an appropriate flush-mounted box, preparing an opening in the wall, and installing the box. The wall bracket should be installed above the box opening, with a minimum cable length of 200 mm outside the opening.

3.2.2 Surface Mounting with Cable Duct: Instructions for preparing the installation site above the cable duct, installing the wall bracket with a 30 mm clearance above the duct, and positioning the cable.

3.2.3 Attaching and Securing the Central Controller: Steps for attaching the controller to the wall bracket, routing the cable, and securing it with a screw.

3.2.4 Removing the Central Controller: Instructions for unscrewing the unit and detaching it from the wall bracket.

4. Commissioning

Overview of Commissioning Steps:

1. Installation and electrical wiring of all VRF system components (outdoor units, indoor units, etc.). Refer to component manuals.
2. Commissioning of system components.

Important Notes for Commissioning:

• Ensure communication by powering on indoor units first, then outdoor units. For AF 6300 systems, follow the specific sequence for power/connection (Indoor Unit, S-Box, then Outdoor Unit).
• Perform system scan 15 minutes after powering on outdoor units.
• During outdoor unit commissioning, do not change the default setting of the selector for the central control unit to avoid communication issues.

4.1 Configuration Wizard: Upon initial power-up, the configuration wizard starts automatically. Follow the on-screen prompts to select language, country, time zone, date, and time; restore saved settings; perform software updates; create administrator accounts; and initiate a system scan.

The first user created is the administrator, who can then create and manage other user accounts and roles.

4.2 Recommended System Configuration: After the configuration wizard, it is recommended to perform the following settings in the main menu:

• User Management: Create users and assign access rights, respecting data protection guidelines.
• Network Settings: Configure network connections.
• Display: Adjust brightness and deactivation time.

5. First Steps

After the scan, the system structure page appears. It is recommended to navigate to the Dashboard page.

To access the Dashboard: Select the header, then the Dashboard icon (?). The Dashboard provides access to all software functions, with important and frequently used functions displayed as tiles.

Dashboard Overview:

• System Monitor: Displays system status, including the number of units, units in operation, units off, and errors.
• Settings: Allows configuration of the central controller, user management, network settings, screen settings, language, date, and time, software updates, and device restart.
• System Overview: Displays all active and inactive units and faults, and allows access to indoor units in various display modes.
• Energy Consumption Report: Shows energy consumption of outdoor units converted to connected indoor units.
• Schedules: Create and modify schedules, assign indoor units to schedules, and set operating periods and functions for indoor units.

6. System Handover

Explain the functionalities and operation of the central controller to the customer. Inform the customer about the selected settings and provide the created login data. It is recommended to hand over this installation manual and inform the customer about data protection. After successful commissioning, save the settings to a USB stick and provide it to the customer (refer to ACC MT User Manual).

7. Guide and Command

Further product explanations and assistance can be requested directly from the central controller. The main menu provides access to 'Guide', which includes 'ACC Information', 'SW Open Source Information', 'Contractual Conditions', and 'Guide'. The 'Guide' function allows recalling the guide for the current screen's operation. For more information, consult the User Manual.

8. Environmental Protection and Disposal

Bosch is committed to environmental protection. The company adheres to environmental laws and regulations, utilizing advanced technology and materials. Packaging materials are compliant with country-specific recycling systems and are reusable. Discarded appliances contain recyclable materials; components are easily separable and marked for classification and disposal.

9. Open Source Software

Bosch Thermotechnik products utilize Open Source Software. A USB stick with Open Source information is included in the scope of delivery. Downloadable information and software updates are available at https://www.bosch-thermotechnology.com/global/. Detailed software information can be accessed via the central control unit's guide.

10. Data Protection Information

Robert Bosch S.p.A. processes personal data for product functionality, security, warranty claims, and marketing. Data may be shared with external service providers. Users have the right to object to data processing. For inquiries, contact DPO@bosch.com.