The FEK control module is a sophisticated device designed to work in conjunction with the weather-compensated WPMi control unit, enabling convenient entry and display of system parameters for heating and cooling systems. It allows users to monitor and optimize their heating system from their living room, providing access to data such as outside temperature, relative humidity, heating circuit parameters (e.g., heating times and required room temperature). The module also features a room temperature sensor that can correct the weather-compensated WPMi control unit.
Function Description:
The primary function of the FEK control module is to provide a user-friendly interface for managing a heating and cooling system. It operates on three control levels:
- Control Level 1 (Control Flap Closed): This level allows users to adjust basic operating modes, including standby, programmed operation, constant day, or setback mode. The selected mode is indicated by a symbol on the display and becomes active after five seconds of no further input.
- Standby Mode: Activates frost protection for heating. The standby symbol flashes when the heat pump manager is in standby mode, and the operating mode cannot be adjusted. Ideal for holidays.
- Automatic Mode: Heats according to a time switch program, switching between day and setback temperatures. An additional sun or moon symbol indicates whether the heating circuit is in day or setback mode.
- Constant Day Mode: Maintains the heating circuit at a constant day temperature, suitable for low-energy houses without setback mode.
- Constant Setback Mode: Maintains the heating circuit at a constant setback temperature, useful for weekends away.
- Control Level 2 (Control Flap Open): This level provides access to more detailed parameters such as room temperature, heating programs, and heating curves.
- Room Temperature Adjustment: Users can adjust the set room temperature for day and setback modes, which results in a parallel offset of the heating curve. This adjustment applies to the current heating time, not the setback time.
- Temperature Scanning: The module allows scanning of various sensor temperatures from the heat pump or system, including outside temperature, actual room temperature, set room temperature, relative humidity, actual DHW temperature, set DHW temperature, actual heat pump return temperature, and system frost protection temperature. A "No display" message appears if a sensor is not connected.
- Heating Program Adjustment: Users can set up heating programs for different periods: every day of the week (Mo-Su), Monday to Friday (Mo-Fr), Saturday and Sunday (Sa-Su), or the whole week (Mo-Su). Three switching time pairs (I, II, III) can be adjusted for each option, determining when the heat pump system operates in day mode.
- Heating Curve Adjustment: This parameter is crucial for maintaining a constant room temperature regardless of outside temperature. The module allows selection of a heating curve for heating circuit 1 or 2. The calculated set return or flow temperature, influenced by outside temperature and set room temperature, is displayed.
- Control Level 3 (For Contractors Only): This level is code-protected and intended for qualified contractors to determine heat pump and system-specific details, such as commissioning parameters.
Usage Features:
- Intuitive Interface: The module features a clear display and a rotary selector for easy navigation and adjustment of parameters.
- Away Key: Activates eco mode (away). Pressing it twice switches the heating circuit to setback mode for one hour. Repeated presses increase the setback duration. The active heating interruption is indicated by a flashing moon symbol.
- Help Key: Allows scanning of sensor temperatures (outside, DHW, return, room, relative humidity). Holding the key for four seconds deletes MIN/MAX values. In case of a fault, an arrow above the help key and an attention symbol flash, and pressing the key displays the fault.
- Programming Pattern: All adjustments follow a consistent pattern: open the control flap to access control level 2, use the ▲ key to select a parameter, press PRG to change its value, use ▲ or ▼ to modify the value (when the red indicator is illuminated), and press PRG again to save. Programming is terminated when the red indicator extinguishes.
- Room Temperature Influence: The FEK control module can be configured to take room temperature into account for control. Setting the room temperature sensor influence to > 0 enables a control cascade that combines weather-compensated and room temperature-dependent return temperature control.
- LCD Test: Pressing PRG once initiates an LCD test, displaying all elements in sequence.
- FEK Software Display: Shows the current software version.
Important Technical Specifications:
- Supply Voltage: 12 V DC ± 15%
- Power Consumption: ~ 25 mA
- Protection Class: IP 40, Protection class II
- Clock Backup: > 10 hours
- Permissible Ambient Temperature (Operation): 0 to 50 °C
- Permissible Ambient Temperature (Storage): -20 to 60 °C
- Room Temperature Sensor: NTC 5 kΩ
- Tolerance (Ohm): ± 1% at 25 °C
- Temperature Tolerance: ± 0.2 K at 25 °C
- Dimensions: 147 x 97 x 33 mm
Maintenance Features:
- Installation and Maintenance: The control module must only be installed and maintained by qualified contractors.
- Commissioning: Only approved contractors may commission the module and instruct the owner on its use. Commissioning involves adjusting system-specific parameters at control level 3, which is code-protected.
- Code Protection: Control level 3 access is protected by a four-digit code (factory-set to 1000). The code must be re-entered if the flap is closed and re-opened for adjustments, but not for checking settings.
- Language and Contrast Adjustment: Contractors can select the language and adjust the display contrast.
- Remote Control Selection: The "FE selection" parameter allows predetermining which heating circuit the remote control applies to. By default, HC1 is pre-selected, meaning its room temperature, heating curve, and heating program parameters are not displayed at the WPMi.
- FE Correction: This parameter allows calibration of the actual room temperature.
The FEK control module is designed for optimal placement on an internal wall, not in a recess, and should be free from obstructions like curtains or direct drafts. External heat influences (e.g., sun, heating systems, TV sets) must also be avoided to ensure accurate temperature readings and proper function. The module's design emphasizes ease of use for daily adjustments while reserving complex system configurations for trained professionals, ensuring both user convenience and system integrity.
Need help?
General
To Next Page
