BLAUBERG S25 Sensor Control Panel

Introduction

This user's manual is a main operating document intended for technical, maintenance, and operating staff. It contains information about the purpose, technical details, operating principle, design, and installation of the S25 unit and all its modifications. Technical and maintenance staff must have theoretical and practical training in ventilation systems and adhere to workplace safety rules, construction norms, and applicable standards.

Safety Requirements

• Please read the user's manual carefully before installing and operating the unit.
• Observe all user's manual requirements and applicable local and national construction, electrical, and technical norms and standards during installation and operation.
• Pay serious attention to warnings in this manual, as they contain vital personal safety information.
• Failure to follow rules and safety precautions may result in injury or unit damage.
• Keep the manual for the entire service life of the unit.
• When transferring unit control, ensure the user's manual is passed to the receiving operator.

Unit Mounting and Operation Safety Precautions

• [Power Disconnect Symbol] Disconnect the unit from power mains before any installation operations.

• [Temperature Symbol] Do not operate the unit outside the specified temperature range.

• [Warning Symbol] Do not operate the unit in aggressive or explosive environments.

• [Electric Tool Symbol] Follow safety regulations for electric tools during installation.

• [Cable Symbol] Do not lay the power cable near heating equipment.

• [Cable Symbol] Do not alter the power cable length.

• [Cable Symbol] Do not bend or damage the power cable.

• [Cable Symbol] Do not place foreign objects on the power cable.

• [Damaged Equipment Symbol] Do not use damaged equipment or cables for connection.

• [Unpack Symbol] Unpack the unit with care.

• [Wet Hands Symbol] Do not touch controls or perform operations with wet hands.

• [Child Symbol] Do not allow children to operate the unit.

• [Unusual Sound Symbol] If unusual sounds, odor, or smoke occur, disconnect from power and contact the seller.

• [Water Symbol] Do not wash the unit with water.

• [Water Protection Symbol] Protect electric parts from water ingress.

• [Maintenance Symbol] Disconnect from power mains before any technical maintenance.

End-of-Life Disposal: The product must be disposed of separately at the end of its service life. Do not dispose of the unit as unsorted domestic waste.

Purpose

Important Safety Notice: The unit should not be operated by children or persons with reduced physical, mental, or sensory capacities, or those without appropriate training. Installation and connection must be performed only by properly qualified personnel after briefing. Ensure the installation location prevents unauthorized access by unattended children.

The wall control panel with a sensor display is designed for controlling industrial and domestic supply and exhaust ventilation units, as well as other air handling units. It is rated for continuous operation and is not designed for standalone use.

Technical Data

Overall and Connecting Dimensions [mm]

The panel has dimensions of approximately 136mm width, 98mm height, and 23mm depth. Connection terminals are arranged on the rear, with a terminal block for power and RS-485 communication, and a connector for an optional temperature sensor.

Installation, Connection to Power Mains and Set-up

[Power Disconnect Symbol] CUT OFF POWER SUPPLY BEFORE ANY OPERATIONS ARE PERFORMED.

[Cable Symbol] DO NOT LAY THE CABLE IN CLOSE PROXIMITY TO THE CONTROL PANEL CABLE! WHILE ROUTING THE CONTROL PANEL CABLE DO NOT COIL THE EXTRA LENGTH.

All devices must be connected to an RS-485 network in a multidrop bus. A single RS-485 network supports up to 16 simultaneous AHUs and up to 16 control panel connections. Avoid using cables over 200 m long for RS-485 bus connections. Avoid connecting more than 32 devices to a single RS-485 bus.

ATTENTION! COMBINING +24 V POWER LINES FROM SEVERAL AIR HANDLING UNITS IS STRICTLY PROHIBITED!

ATTENTION! CONNECTING MORE THAN 3 CONTROL PANELS TO A SINGLE AHU REQUIRES AN EXTERNAL POWER SUPPLY UNIT.

Control Panel Wall Surface Mounting

1. Route the control cable to the mounting location, permanently laid in the wall.
2. Use a screwdriver to press the latch on the unit casing end face and separate the casing halves.
3. Route the cable through a round hole in the back panel and attach the panel to the mounting surface. Insert the connector into the bracket.
4. Connect the power supply cable wires according to the electrical connections diagram.
5. Remove the connector with the cable from the bracket and connect it to the female connector on the circuit board.
6. Match the prongs of the lower part of the front panel with the slots in the lower part of the back panel at a 45° angle and join until they lock in place.

DIP Switch Configuration

• Rocker 1: Set to OFF for service engineers only (programming).
• Rocker 2: Set to ON if the control panel is the first or last device on an RS-485 bus to activate/deactivate the terminal resistor.

Temperature Sensor: If a room temperature sensor is physically present, select "Sensors in control panel" in the control panel menu.

Network Setup

The RS-485 network operates on a multi-master principle: Slave devices are AHUs; Master devices include control panels, external sensors, and smart home systems.

RS-485 Network Factory Settings:

• Controller address: 1
• Data transfer rate: 115200 baud
• Stop bits: 2
• Parity: none

ATTENTION! RS-485 network parameters for AHU controllers are set via the mobile application.

To set up multiple control panels for a single AHU or a single panel for multiple AHUs, integrate them into an RS-485 network and configure:

1. Use the mobile application to assign a unique address (1-16) for each AHU.
2. In the control panel's Connection window, assign a unique address to each control panel and select the AHU address to be controlled.

Engineering menu password is 1111 (default). Controller addresses range from 1 to 16. Control panel addresses range from 1 to 16. RS-485 network parameters (Baud rate, Stop bits, Parity) must be identical for the AHU controller and the control panel.

A warning "No communication with the device. Check the connection." will appear if parameters are incorrect or the cable has issues.

Control Interface

The control panel features a Home page displaying current status and allowing navigation.

Buttons:

• [Power Symbol] (ON/OFF): Unit ON/OFF (Standby mode activation).
• [Arrow Left/Right] (< >): Select desired pre-set speed.
• [Percentage Symbol] (%): Manual speed selection (minimum to 100%). Pressing it again allows adjustment via arrows. Pressing % again reverts to pre-set speeds.
• [Timer Symbol] (ON/OFF): Timer activation/de-activation. Timer settings are adjusted in the Timer window.
• [Schedule Symbol] (ON/OFF): Weekly schedule activation/de-activation. Settings are adjusted in the Schedule window.

Indicators:

• [Warning Symbol]: Current warnings shown in the Alarms window.
• [Filter Symbol]: Filter replacement alert (see Basic settings -> Filter).
• [Fireplace Symbol]: Fireplace mode (see Engineering menu -> Temperature).
• [Boost Symbol]: Boost mode (see Engineering menu -> Temperature).
• [Heater Symbol]: Electric preheater or reheater operation.
• [Water Heater Symbol]: Return water heater operation.

Sensors:

Displays current temperature readings from selected sensors (supply air, extract air, room). Icons for Humidity, CO2, PM2.5, and VOC sensors show current readings. If both main and external sensors are configured, readings from the main sensor are displayed.

Sensor Indicator Colour: Grey (no sensor detected), Blue (below pre-set value), Red (exceeds pre-set value).

[Lock Symbol]: Screen lock button.

Basic Settings

Temperature

Set desired room temperature and select control options: Ventilation (heat recovery only), Heating (automatic warming), Cooling (automatic cooling), Auto (maintains pre-set air temperature).

Air Quality

Set threshold values for humidity, CO2, PM2.5, and VOC sensors. The unit automatically maintains user values by adjusting fan speed.

Timers

When the Main timer is enabled, the unit switches to temporary settings: pre-set speed selection (0=Standby, 1, 2, 3...), timer set-up for hours/minutes, and temperature control level (0=off, +15°C to +30°C).

Boost switch-off delay: 0-60 min for Boost mode deactivation after loss of signal.

Boost switch-on delay: 0-15 min for Boost mode activation after receiving a signal.

Schedule

The weekly schedule allows setting four time periods per day for speed, period, and temperature. Pre-set speed: 0 (Standby), 1, 2, 3. Time periods define start and end times. Control temperature: 0 (off), +15°C to +30°C.

Date and Time

Set current date and time to enable weekly schedule operation.

Filter

Set the filter maintenance timer (70-365 days). A filter replacement alert will appear on the main page and in the Alarms window. Set to 0 days to disable the timer (e.g., if using pressure switches).

Alarms

Accesses the Alarms menu to view current alarms and alarm history.

Alarms Menu

Current Alarms

Indicates the number of current alarms (serious malfunction, unit forced shutdown, requires manual reset) and warnings (not forced shutdown, reset automatically).

Alarm History

Logs alarm/warning codes with their date and time.

Language

Interface language selection (English, Deutsch, Polski, Русский, Українська).

Display

Settings for sound, screen brightness (1-64), auto-lock time (0-300s), and unlock password (enable/disable, change password). Default password is 1111; factory password is 2604.

Engineering Menu

Access requires a password (default 1111). This menu is for expert use and affects unit operation significantly.

Air Flow

Set air flow rates for Standby, Boost, Fireplace, and speed modes (1, 2, 3...).

Temperature

Displays current temperatures (intake, supply, extract, exhaust, room, return water). Allows sensor selection for temperature control. Sets minimum supply air temperature and winter/summer changeover points.

Sensors

Configure main and external sensors (RH, CO2, VOC, PM2.5). Enables built-in temperature sensor for room readings. Sets measurement range for CO2 and PM2.5. Configures Boost and Fireplace switches. Supports 0-10V control devices. Monitors various inputs like fire alarm, water pressure, heat-transfer flow, fan RPM, filter status, and heater thermostats.

Main Heater

Select heater type (electrical, water) and configure parameters like valve position, start time, start temperature, and alarm temperatures for winter operation. Includes standby temperature settings.

Cooler

Select cooler type (discrete/analogue) and operation mode. Configure minimum off/on times and cooler hysteresis.

Heat Recovery

Configure bypass/rotary heat exchanger control mode (Close, Open, Manual, Auto). Set freeze protection type (Supply fan, Bypass, Preheating, Rotary heat exchanger).

Sensor Correction

Adjust sensor readings for outdoor, indoor, supply, return water, and extract/exhaust air temperatures within a range of -50.0°C to +50.0°C.

Firmware

Displays firmware information for the control panel and controller.

Factory Settings

Option to reset the device to factory settings, which may affect Wi-Fi, RS-485, and Ethernet configurations.

Alarm and Warning Codes