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Installation and Operating Instructions
EN
Central ventilation unit – KWL 500 W/W ET
• 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).
8.6.7 Configuration
The corresponding basic configuration settings are assigned to the unit via the configuration number.
ⓘ The configuration number must only be adjusted when replacing the circuit board (e.g. defect). The configura-
tion number is located on the type plate.
8.6.8 Heating settings
Define settings for preheating and auxiliary heating:
• Preheating
ⓘ The preheating is used exclusively for frost protection (not for adjusting the supply air temperature).
• Electric heating element
• Not used
• Auxiliary heating (post-heating)
ⓘ This function is only available in combination with an extension module KWL-EM eC.
• Electric heating element
• Warm water heating element
• Not used
• Maximum intake temperature setting
The auxiliary heating is activated if the temperature falls below the set value.
8.6.9 Bypass settings
Define settings for the heat exchanger bypass:
• Bypass
If necessary, the intake air can be directed past the heat exchanger using the bypass function.
– Activate bypass: Intake air is directed past the heat exchanger.
– Deactivate bypass: Intake air is directed through the heat exchanger.
• Variable bypass
ⓘ The bypass function must be activated, otherwise the variable bypass cannot be activated.
The set supply air temperature can be controlled efficiently using the variable bypass. For this purpose, the actual
temperature in the room is measured and compared with the set supply air temperature setpoint. If there is a diffe-
rence, the bypass position will be automatically controlled to achieve the set supply air temperature as accurately
as possible.
• Activate/deactivate cold recovery system
The living spaces are ventilated with supply air that is as cool as possible by activating the cold recovery system. The
bypass function depends on the temperature level of the intake air in relation to the room temperature.
Bypass ON
Intake air is cooler than the room air. The intake air flows directly into the living spaces as supply air.
Bypass OFF Intake air is warmer than the room air. The intake air is cooled by the extract air via the heat exchanger.
ⓘ If the cold recovery system is activated, the plug at the bottom of the unit must be removed (see Fig. 36,
Fig. 37) to ensure the condensate drainage (cf. also chapter 4.4 „Install ball siphon", page 12).
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