Electrical pre-heater –
KWL-EVH 200/300 W
Installation and Operating Instructions
EN
EN
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2.1 Shipping
The delivery is packed ex works in such a way that it is protected against normal transport strain. The shipping must
be carried out carefully.
When transhipping (especially over longer distances, e.g. sea routes), check if the packing is adequate for method and
manner of transportation. Damages due to improper transportation, storage or commissioning must be verified and are
not liable for warranty.
2.2 Receipt
The shipment must be checked for damage and correctness immediately upon delivery. If there is any damage, prompt-
ly report the damage with the assistance of the transport company. If complaints are not made within the agreed period,
any claims could be lost.
2.3 Storage
It is recommended to leave the product in the original packaging before installation to prevent any possible damage
and contamination.
When storing for a prolonged time the following measures should be taken to avoid damaging influences:
• Protection by dry, air-tight and dustproof packaging (plastic bags with drying agent and moisture indicators).
• The storage place must be waterproof, vibration-free and free of excessive temperature variations.
Damages due to improper transportation, storage or commissioning must be verified and are not liable for warranty.
2.4 Regulations and guidelines
If the ventilation unit is installed correctly and used to its intended purpose, it conforms to all applicable regulations and
CE guidelines at its date of manufacture.
2.5 Warranty claims – Exclusion of liability
All versions of this documentation must be observed, otherwise the warranty shall cease to apply. The same applies to
liability claims against the manufacturer.
The use of accessory parts which are not recommended or offered by Helios is not permitted. Any possible damages
are not covered by the warranty.
Changes and modifications to the product are not permitted and lead to a loss of conformity, and any warranty and
liability shall be excluded in this case.
3.1 Functional description
The electrical pre-heater
KWL-EVH 200/300 W
is used to prevent the freezing of the ventilation unit heat exchanger.
For this purpose, the intake air temperature is increased by the electrical pre-heater.
The pre-heater is equipped with two safety temperature limiters. The pre-heater has a two-stage safety temperature
limiter (Auto reset = trigger temp. +60 °C and manual reset = trigger temp. +110 °C). The first limiter resets itself auto-
matically, and it is necessary to isolate the unit from the mains power supply for around 5 minutes in order to reset after
the second stage is triggered.
3.2 Technical data
Technical data
KWL-EVH 200/300 W
Power supply
1~ 230 V~
Output
1000 W
Rated current
4.4 A
Electrical pre-heater (output)
1.0 kW
Protection category
IP20
4.1 Unit installation and connection
Unit damage due to the unnoticed resetting of the electrical pre-heater’s thermal contact switch!
The unnoticed resetting of the electrical pre-heater’s thermal contact switch can result in unit damage.
> The unit must not be regularly activated or deactivated via an external switching device (e.g. timer) in the unit
supply line.
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Risk of injury due to the unit door falling down!
The unit door can fall down when removing and cause serious injuries.
> Wear protective footwear.
> Carefully remove the unit door with both hands.
1. Open both upper snap-in hooks on unit door.
2. Remove unit door.
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Risk of injury due to the high weight of the heat exchanger!
The heat exchanger can fall down and cause serious injuries when removed.
> Wear protective footwear.
> Carefully remove the heat exchanger from the unit with both hands.
CHAPTER 2
BASIC
INFORMATION
CHAPTER 3
PRODUCT-
INFORMATION
CHAPTER 4
INSTALLATION &
ELECTRICAL
CONNECTION
ATTENTION
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WARNING