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Installation and Operating Instructions
Central ventilation unit – KWL 470 W/W ET
The limit values for the relative humidity can be manually adjusted.
• CO2/VOC limit
8.6.3 Heat exchanger frost protection
Setting the boundary conditions for frost protection:
• Passivhaus
ⓘ Mandatory selection for Passivhaus.
• DiBt
8.6.4 Modbus settings
The following parameters can be adjusted:
• Address
• Baud rate
• Parity
• Stop bit
8.6.5 Input settings
View or edit input settings:
• Analogue input
• Not used
• Stop (0-1 V), Away from home (2-4 V), At home (5-7 V), Intensive ventilation (8-10 V)
• Digital input 1 / Digital input 2
• Not used
• Fireplace mode Off / On (0 V / 24 V)
• At home / Away from home (0 V / 24 V)
• Emergency off/Normal mode (0 V / 24 V)
• Intensive ventilation Off/On (0 V / 24 V)
• Normal mode / Bypass (0 V / 24 V)
• Weekly programme Off / On (0 V / 24 V)
• Configurable input Off / On (0 V / 24 V)
ⓘ The digital inputs can be adjusted using the pen
8.6.6 Relay settings
Set and edit the relay function:
• Maintenance display
Filter replacement is displayed (relay status: closed)
• Error message
Error message is displayed (relay status: closed). The error is also recorded on the error log.
• Error message or maintenance display
Filter replacement or error message is displayed (relay status: closed)
• Emergency off
Emergency off function is activated (relay status: closed). The emergency off function is normally activated by an
external signal via the digital input.
• Position bypass shutter
Bypass shutter position is displayed.
– Relay open:
Bypass is activated. The air flow is directed past the heat exchanger.
– Relay closed:
Bypass is deactivated. The air flow does through the heat exchanger.
• Control EWT (not available yet)
• Operating mode
• Automatic
• Manual
• Use of EWT control
• Both
• Preheating
• Precooling
• Winter setting
• Summer setting
• Condensate prevention
• Manual
• Automatic
• Minimum supply air temperature
• Not used
The ventilation unit relay control is not used.
• Air preheating (not available yet)
• Operating notification
Ventilation unit is in operation (relay status: closed).
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