Helios 8327 Nstallation And Operating Instructions Download Page 40

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1.0

Important information

To ensure safety and correct operation please read and observe the following instructions carefully before proceeding.
Important information is specified in the maintenance section on filter changes and necessary cleaning and maintenan-
ce activities. The user usually carries out the filter change. More extensive cleaning and maintenance work must only be
carried out by qualified electricians.

Before any cleaning and maintenance work, the KWL unit must be isolated from the main power supply

using the main isolator switch on the top side of the unit and secured against re-activation.

The planning office provides the planning documents necessary for system calculations. Additional information can be
requested ex works. Keep the installation and operating instructions as a reference at the device. After the final assem-
bly, the document must be handed out to the operator (tenant/owner).

1.1 Warning and safety instructions

The adjacent symbol is a safety-relevant prominent warning symbol. All safety regulations and/or symbols must

be absolutely adhered to, so that any dangerous situation is avoided.

1.2 Warranty claims – Exclusion of liability

If the preceding instructions are not observed, all warranty claims and accommodation treatment are excluded. This
also applies to any liability claims extended to the manufacturer.
The use of accessories not offered or recommended by Helios is not permitted. Potential damages are not covered by
warranty.

1.3 Provisions – guidelines

If the product is installed correctly and used to its intended purpose, it conforms to all applicable EU guidelines at its
date of manufacture.

1.4 Receipt

The delivery contains one of the following unit types:

KWL EC 800 S Pro

Ref no. 8327

KWL EC 800 S Pro WW

Ref no. 8328

KWL EC 1200 S Pro

Ref no. 8345

KWL EC 1200 S Pro WW

Ref no. 8346

KWL EC 1800 S Pro

Ref no. 8329

KWL EC 1800 S Pro WW

Ref no. 8330

KWL EC 2600 S Pro

Ref no. 8331

KWL EC 2600 S Pro WW

Ref no. 8332

The scope of delivery also includes:
- 1x duct sensor (already connected to terminal box)
- 1x surface-mounted controller (with touchscreen) incl. connection cable (10 m)
- Key for inspection openings (check for completeness upon acceptance!)

Please check delivery immediately on receipt for accuracy and damage. If damaged, please notify carrier immediately.
In case of delayed notification, any possible claim may be void.

1.5 Storage

When storing for a prolonged time the following steps are to be taken to avoid damaging influences:
Protection by dry, air- dustproof packing (plastic bags with drying agent and moisture indicators). The storage place
must be water-proof, vibration-free and free of temperature variations. Damages due to improper transportation, stora-
ge or putting into operation are not covered by warranty.

1.6 Shipping

The unit is packed ex works with EPS moulded parts so that it is protected against normal transport strain. Carry out
the shipping carefully. It is recommended to leave the unit in the original packaging until installation to avoid possible
damages and contamination.

1.7 Area of application – Application

The compact units KWL EC.. S Pro/WW with heat recovery are suitable for the central ventilation of houses and apart-
ments built upon passive-house standards (PHI) or as a decentralised solution for commercial and industrial applica-
tions. Equipped with a highly efficient cross counter flow heat exchanger with a heat recovery efficiency of over 80%,

see table:

The KWL unit must not be operated in conjunction with an active cooling system e.g. air conditioning!

Operating range according to passive house standard

KWL EC 800 S Pro/WW

Flow rate [m³/h]

290-620

Heat recovery efficiency

80 %

KWL EC 1200 S Pro/WW

Flow rate [m³/h]

400-890

Heat recovery efficiency