Configuration; Heating Settings; Bypass Settings; Heat Exchanger - Helios KWL 340 D Manual

Installation and Operating Instructions
EN
CHAPTER 9
SERVICE AND
MAINTENANCE
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DANGER
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WARNING
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WARNING
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WARNING
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Central ventilation unit – KWL 220/340 D
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
• Extension module
• No
• Yes
• Auxiliary heating (only if extension module is configured)
• No
• Yes
ⓘ This function is only available in combination with an extension module KWL-EM eC.
• Heater type (depending on configuration on the extension module)
• Warm water heating element
• Electric heating element
• 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.
8.6.10

Heat exchanger

Define heat exchanger type:
• Aluminium
• Plastic
• Enthalpy
8.6.11

Save / Restore

Save or restore unit and user settings:
• Commissioning settings
• Save commissioning settings
• Restore commissioning settings
• User settings
• Save user settings
• Restore user settings
• Restore factory settings
9.1

Unit maintenance

The unit must be checked for contamination and dirt (visual inspection) once a every year.
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Danger to life due to electric shock!
An electric shock can result in death or serious injuries.
> Before any maintenance and installation work or before opening the cover, the unit must be fully isolated from
the power supply.
> The electrical connection may only be carried out by an authorised electrician according to the wiring dia-
grams.
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Risk of burns due to hot surfaces!
Hot surfaces can cause serious burns.
> Allow unit to cool down for at least 5 minutes or wait until the fans are turned off.
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Risk of injury due to rotating fans!
Rotating fans can injure limbs and cause serious injuries.
> Before working on the unit, wait until the fans are turned off.
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Risk of injury due to the unit door falling down!
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