Connecting Spigots; Air Ducting, Ventilation Circuit; Unit Insulation; Electrical Connection - Helios KWL EC 220 D Eco R Montage- Und Betriebsvorschrift

Installation and Operating Instructions
EN
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ATTENTION
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ATTENTION
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WARNING
Compact ceiling units KWL EC 220 D Eco
An open outlet should be installed due to odour development from a dried out siphon (sketch Fig.4). The condensate
drain runs via the base tray (beading) of the unit and is connected to the discharge line of the building drainage system.
The drainage of the condensate must end in the siphon.
The drainage pipe route must not rise above the siphon!
The condensation outlet must be made frost-proof!
2 .3

Connecting spigots

The units are supplied with four spigots (diameter 125 mm). A secure and tight connection to the spigots is required
(e.g. IsoPipe IP-125), the connector RVBD 125 K (Ref. no. 3414) must be used in this respect. The arrangement of the
ventilation duct can be seen from figures 9/10 on page 20, depending upon the model.
2 .4

Air ducting, ventilation circuit

When designing the ductwork, use the shortest possible runs. Airtight connections and changeovers must be ensured
for the best possible heat recovery. To avoid pressure losses, dirt build-up and noise, use smooth ducts. The following
duct diameter DN 125 mm (e.g. isolated pipe system Iso-Pipe IP-125, accessories) is to be planned for main lines
(outside, extract air, supply air distributor, extract collector), and the diameter is reduced accordingly for branch lines.
In order to prevent condensation in the outside and outgoing air pipes, these are to be insulated in an appropriate way.
The minimum insulating thicknesses in accordance with DIN EN 1946-6, 05/2009 must be observed. If supply and
extract air ductwork run through unheated rooms, insulation must be provided to reduce heat losses. The supply air
must be delivered to the primary rooms and the extract air must be removed from the secondary rooms. Supply and
extract air openings must have adjustable elements or valves (accessories) in order to regulate the system.
During extraction of polluted extract air, a filter (accessories) is to be connected. The installation of kitchen hoods to the
system (cause: dirt, fire danger, hygiene) is not permitted. To ensure air circulation within the room, sufficient overflow
openings (door gap, door grilles) are to be planned.
Any fire and building regulations must be observed .
2 .5

Unit insulation

If installed in heated rooms and higher humidity condensation can occur at the outside of the unit in the outside air area.
In this case a water-vapour-tight insulation is to be attached laminar in this area. Furthermore the outside and outgoing
air ductwork should be insulated sufficiently.
If installed in non-heated areas (e.g. frost-protected attic) a sufficient insulation outside on the unit is to be installed all
around. Otherwise condensate formation could occur on the housing sides. The condensate removal must be installed
frost-protected, perhaps with a heater.
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2 .6

Electrical connection

The unit must be fully isolated from the mains power supply before any maintenance or installation work or
opening the terminal compartment! The electrical connections must be carried out in accordance with the rele-
vant wiring diagram and are only to be carried out by certified electricians . The unit must be fully isolated from
the mains power supply until final assembly!
The relevant standards, safety regulations (e.g. DIN VDE 0100) and the technical connection regulations of the
energy supply company must be observed. An all-pole mains switch / isolator, with at least a 3 mm contact opening
(VDE 0700 T1 7.12.2 / EN 60335-1) is mandatory.
The flush-mounted comfort controller KWL BCU with graphic display is connected to the unit by means of a 3 m con-
necting cable (also available in 10 or 20 m length).
The KWL compact units are delivered with a shockproof plug. If special components are to be connected, the connec-
tions must be made in the terminal box.
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