KWL EC 270 Eco KWL EC 370 Eco

Helios Ventilatoren
INSTALLATION AND OPERATING INSTRUCTIONS
Passive-house compact units
KWL EC 270 Eco
KWL EC 370 Eco
- Ventilation with heat recovery and
EC-technology
No. 86 906 E
ENGLISCH
Helios Ventilatoren
INSTALLATION AND OPERATING INSTRUCTIONS
Contents
CHAPTER 1. GENERAL INFORMATION AND OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.0 Important information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.1 Warning and safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.2 Warranty – Exclusion of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.3 Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.4 Receipt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.5 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.6 Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.7 Application - Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.8 Mode of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 1
1.9 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2
1.10 Fire places . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2
1.11 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2
CHAPTER 2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3
2.0 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3
2.1 Wall installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3
2.2 Condensation outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
2.3 Connecting spigots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
2.4 Air ducting, ventilation circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
2.5 Unit insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
2.6 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
CHAPTER 3. OPERATIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6
3.0 Functional layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6
3.1 External connection components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6
CHAPTER 4. SPEED CONTROLLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
4.0 Integrated speed controller KWL-BU 270/370 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
4.1 Setting range of power steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
CHAPTER 5. COMPONENTS/DIMENSIONS/PERFORMANCE CURVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 10
5.0 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 10
5.1 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11
5.2 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11
CHAPTER 6. SERVICE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
6.0 Service and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
6.1 Cross counterflow heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
6.2 Filter change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
6.3 Condensation outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 13
6.4 Access to internal terminal box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 13
6.5 Dismounting EPS-interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 13
6.6 Installation EPS-interior with motor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14
6.7 Error message „ LED code“ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14
6.8 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14
6.9 Wiring diagram SS-942 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 15
6.10 Wiring KWL EC Eco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 16
Notes: : . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 17
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
CHAPTER 1
1.0
Important information
To ensure safety and correct operation please read and observe the following instructions carefully before proceeding.
In the maintenance part important information is specified over filter changes and necessary cleaning and maintenance
activities. The user usually accomplishes maintenance work. The chapter „ installation “with important installation tips
and unit basic adjustments is addresses to the professional installer.
The electrical connection must be fully isolated from the supply up to the final assembly!
The planning office provides the planning documents necessary for the system calculation. Additional information can
be requested ex works. Keep the installation and operating instructions as a reference at the device. After the final
assembly the document must be handed out to the operator (tenant/owner).
1.1
Warning and safety instructions
Accompanying symbol is a safety-relevant prominent warning label. All safety regulations and/or symbols must
be absolutely adhered to, so that any danger situation is avoided.
1.2
Warranty – 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 liable for
warranty.
1.3
Certificates
If the product is installed correctly and used to its intended purpose, it conforms to all applicable European Standards
at its date of manufacture.
1.4
Receipt
The delivery contains the unit: KWL EC 270 Eco or KWL EC 370 Eco with integrated controller. 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, storage or putting into operation are not liable for warranty.
1.6
Shipping
The unit is packed ex works in such a way that it is protected against normal transport strain. Carry out the shipping
carefully. It is recommended to leave the unit until installation in the original packaging to avoid possible damages and
soiling.
1.7
Application - Operation
Compact unit with heat recovery fo central ventilation of houses and apartments built upon passive-house standards
(PHI) or as decentral solution for commerical and industrial applications. With high efficient cross counterflow heat
exchanger with an efficiency of, see chart:
GENERAL INFORMATION AND
OPERATING INSTRUCTIONS
WARNING


Unit
NOTE
Rated air flow volume [m³/h]
121
168
KWL EC 270 Eco
Efficiency
89 % PHI
85 %
KWL EC 370 Eco
Efficiency
90 % PHI
86 %
251
84 %
Equipped with latest EC motor technology with constant air flow regulation. This ensures that the adjusted air flow rate
is preserved regardless of changing resistances e.g. dirty filters on each operating level.
The standard equipment permits the installation and the application in frost-free rooms > + to 5 °C.
If the unit is to be used in other applications where high humidity, excessive dust, temperature in excess of 40°C or long
periods at standstill (not running), please contact your local Helios dealer for advice. This also applies for special technical and electrical applications.
The fan may only be used according its intended purpose!
☞
1.8
Mode of operation
The KWL EC 270/370 Eco is equipped with a cross counterflow heat exchanger. In this the heat of the extracted air is
recovered and transferred through the plates to the incoming fresh external air, so both air flows remain separated.
Through this procedure more than 90% of the extract air heat is being transferred to the external air. The supply air is
led by the duct system to the primary (supply air needing) areas. The used air is extracted from the secondary areas
(like e.g. social rooms, toilets, showers etc.). It flows back through the ducting to the ventilation unit, transfers the heat
and is discharged by the extract air duct to the atmosphere.
The efficiency depends on several factors. These are among other things humidity of the air and temperature difference
of the outside air and exhaust air. The fan speed can be regulated via the integrated controller.
The KWL-units have a power output. With this an upstream pre-heater battery (accessories EHR-R 1,2/160) can be
controlled, which prevents at extremely cold outside temperatures the heat exchanger from icing up. The summer bypass is the optimal solution for the warmer months of the year to lead cooler outdoor air into the building. The air is
optimal pre-filtered by the built-in filters; this provides for a hygienic unit and at the same time the life span of the KWL-
1
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
unit is guaranteed. Supply of cleaned outside air using a standard G4 filter (optional F7 pollen filter). Extract air passes
through a standard G4 filter before entering the heat exchanger.
1.9
NOTE
☞
Performance
To achieve the given performance, the unit must be installed correctly. Varying from the design and installation requirements and also by incorrect operation can lead to a reduction in capacity or noise increase. Noise figures are stated in
sound power levels LWA in dB(A) (conforms to DIN 45635, T.1). Sound pressure levels LPA depend on room specific
conditions. These conditions may affect the measurement result on site and vary from the catalogue data.
1.10 Fire places
Fire and building regulations must be observed !
1.11 Technical data
KWL EC 270 Eco
Voltage/Frequency
Rated current – ventilation
Pre-heating battery (output)
Standby-losses
Electrical connection
Air flow rates Vm³/h (3 steps)
230 V~/50 Hz
1,0 A
1,2 kW
<1W
NYM-J 3 x 1,5 mm2
285 / 170 / 110
Wiring diagram
Temperature operating range
Weight approx
Protection to
SS-942
-20 °C bis 40 °C
48 kg
IP20
KWL EC 370 Eco
Voltage/Frequency
Rated current – ventilation
Pre-heating battery (output)
Standby-losses
Electrical connection
Air flow rates Vm³/h (3 steps)
230 V~/50 Hz
2,2 A
1,2 kW
<1W
NYM-J 3 x 1,5 mm2
350 / 200 / 140
Wiring diagram
Temperature operating range
Weight approx
Protection to
SS-942
-20 °C bis 40 °C
51 kg
IP20
2
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
2.0
CHAPTER 2
INSTALLATION
NOTE
☞
Assembly
The KWL compact unit is suitable for „ hanging“ arrangement, for installation on the wall or for installation in a cupboard
and therefore for installation within a room of the dwelling. Due to operating noises which change according to system
pressure it is recommended to install the KWL unit in the washing room, hall, utility rooms, storerooms or habitable
rooms. Pay attention that in the installation area a waste water connection is available. Consider also tips on the page
4 "condensation outlet"!
The assembly should occur in such a way that preferably short ventilation ducts as well as their trouble-free connection
with the unit are possible. Tight bends can lead to a high pressure loss and flow noise. The ventilation ducts may be folded under no circumstances. A secure and tight connection of the ductwork is required. For maintenance and installation work, the unit must be accessible.
Important information:
1. Terminal box is for right-hand version on the left side accessible, for left-hand version on the right side.
2. If a electric pre-heater battery is installed, the duct must be at least 1 m before and after the heater battery
from not inflammable material (see functional layout Fig.11).
3. The heating must be installed in such a way that the electric box is easily accessible.
4. In order to avoid sound transmissions, a suitable acoustic insulation must be planned on site depending
upon the structure.
5. The installation of the KWL compact unit is permitted only in frost-protected areas, since the danger of freezing exists. The ambient temperature may not drop below +5 °C!
ATTENTION
2.1
Wall installation
For the wall connection the pre-assembled mounting rails (2 pcs. top; 1 pc. bottom) on the unit rear panel are to be
used. Remove one of the upper rails (Fig.1) and mount this horizontally to the wall (Fig.2/3).
fig.1
ATTENTION
fig.2
Finally loosen the lower mounting rails, turn by 180° and screw this to the unit rear panel again. Fit compact unit onto
upper wall rail (Fig.3) and screw together with lower mounting rail on the wall (Fig.4).
It is to be guaranteed that the unit is mounted 100 % horizontally (absolutely necessary for normal condensate
drainage).
fig.3
fig.4
Unit bottom side
Wall
3
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
2.2
Condensation outlet
During the heating period the humidity of the exhaust air condenses to water. In new buildings or while having a bath or
sauna as well as with laundry-drying, plenty of condensate can be formed. The condensation must be able to run off
freely from the unit. The condensate is led to the outside by a PVC hose Ø 10 mm (included in delivery). For this must
the connection to the local drainage system is to be guaranteed.
Assembly: Fold out condensate drain at the bottom side of the unit ( Fig. 5) and attach PVC hose ( Fig. 6).
fig.5
The exhaust rivet for the pressure balance may not be locked or covered ( Fig. 7/8). On account of the odour development with a dried out syphon, an open run-off should be covered (sketch Fig. 8). The condensate run-off runs over the
drip tray of the unit and is connected to the drain pipe of the drainage system of the house. The removal of the condensate must end in the syphon.
The condensate piping must ensure the effective gravity flow of the condensate !
The condensation outlet must be installed frost-proof !

fig.7
fig.8
exhaust rivet
exhaust rivet
syphon
Connecting spigots
The units are supplied with four connecting spigots (diameter 160 mm) with rubber lip-seals. A secure and tight
connection to the spigots is required. The arrangement of the ventilation duct can be seen from the figures 9 and 10,
depending upon model.
right-hand
exhaust
outside air
)RUWOXIWair $XVVHQOXIW
side unit
fig.9
left-hand
side unit
extract
$EOXIW air
back side
4
fig.10
front
outside
air
$XVVHQOXIW
exhaust
)RUWOXIW air
extract
$EOXIW air
front
supply
=XOXIW air
supply
=XOXIW air
back side
2.3
ATTENTION
fig.6
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
2.4
To reduce condensation in the extract and outside air pipes these are to be insulated in an appropriate way. The minimum insulating thickness in accordance with German Institute for Standardization EN in 1946-6, 05/2010 are to be
kept. If supply and exhaust air ductwork run through unheated rooms, insulation must be provided to reduce heat losses. Fresh air should be supplied into living and bedrooms, extraction takes place in bathrooms, toilets and kitchens.
To balance the whole system, supply and extract openings should be provided with adjustable valves (accessories).
During extraction of polluted extract air a filter (accessories) is to be connected. It is not allowed to install kitchen hoods
to the system (cause: dirt, fire danger, hygiene). To ensure air circulation within the room sufficient overflow openings
(door gap, door grilles) are to be planned.
Fire and building regulations must be observed.
ATTENTION
WARNING
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 ( plastic or rigid
ducting). For main lines (outside, extract air, supply air distributor, discharge collector) DN 160 mm is to be planned, for
branch lines the ø is reduced accordingly.

2.5
Unit insulation
If installed in heated rooms and higher humidity condensation can occur at the outside of the unit in the outside and
extract air area. In this case a water-vapour-tight insulation is to be attached laminar in this area. Furthermore the outside and extract air ductwork should be insulated sufficiently.
If installed in not 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 casing sides. The condensate removal must be installed
frost-protected, perhaps with a heating.
2.6
Electrical connection
All work must be carried out with the equipment fully isolated from the power supply. The electrical connection
are to be carried out in accordance with the relevant wiring diagram and are only to be done by a certified electrician.
The electrical connection must be fully isolated from the supply up to the final assembly!
All relevant safety regulation, national standards and norms are to be adhered to. An appliance is required for cut off
from the supply with a minimum of 3 mm contact opening of each pole.
Assembly of external connection box:
The length of the connecting cable to the external connection box (IP 66) is approx. 1 m. The connection box can be
attached e.g. to the wall next to the unit.
5
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
3.0
CHAPTER 3
Functional layout
fig.11
OPERATIONAL
DESCRIPTION
If%HL
a electric
pre-heater
is installed,
the
duct
must be at
least
m before
and +HL]UHJLVWHU
after the heater
9HUZHQGXQJ
HLQHVbattery
+HL]UHJLVWHUV
PXVV
GDV
5RKUV\VWHP
P
YRU1XQG
QDFK GHP
PLW WHPSHUDWXUEHVWlQGLJHP
E]Z QLFKW
EUHQQEDUHP material
5RKU YHUVHKHQ
ZHUGHQ
]% :LFNHOIDO]URKU
battery
from heat resistant and/or
not inflammable
(e.g. folded
spiral-seam
pipe)
air
Extract
$EOXIW
Supply
=XOXIW air
Extract air
)RUWOXIW
7
7
7
7
Outside
air
$X‰HQOXIW
Fig.
$EEKWL
.:/EC
(&270/370
right-hand
(&2 5HFKWVunit
3RV
Pos.
%HQHQQXQJ
Description
T17
$X‰HQOXIWIKOHU
Outside
air sensor
T27
Supply
air sensor
$EOXIWIKOHU
T4 7HPSHUDWXUEHVWlQGLJHV E]Z QLFKW EUHQQEDUHV 5RKU ]% :LFNHOIDO]URKU
Extract
air sensor
7
T37
3.1
NOTE
☞
=XOXIWIKOHU
Extract
air sensor
)RUWOXIWIKOHU
7HPSHUDWXUEHVWlQGLJH E]Z QLFKW EUHQQEDUH 'lPPXQJ
1 2 Heat
resistant 7\SH
and/or(+55
not inflammable
9RUKHL]XQJ
pipe (e.g. folded spiral-seam pipe)
3
Electric pre-heater battery: HER-R 1,2/160
4
Filter box: LFBR 160 G4
/XIWILOWHU%R[
/)%5
*
Heat
resistant7\SH
and/or
not inflammable
insulation
$UW1U
External connection components (see also wiring diagram SS-942)
3.1.1 Electric pre-heating
According to passive house criteria a preheating is compulsorily necessary, in order to avoid an icing up of the
cross counterflow heat exchanger!
- Control by electric heater battery EHR-R 1,2/160
The electronics of the KWL compares the temperature setpoint (factory setting +3 °C) with the extract air temperature
(sensor T4). In the case of a deviation the preheating is activated, in order to obtain a permanent extract air temperature.
The electronics of the KWL compares the comfort temperature (set point Passive House Institute: +16,5 °C) with the
supply air temperature (sensor T2). In the case of a deviation the preheating is activated, in order to obtain a permanent
supply air temperature. The activation of the preheating occures only, if no error messages are signalled „ LED code
“(see point 6,7) at the controller KWL-BU 270/370 and below the minimum flow rate of the supply air fan.
In order to protect the heating element of the electric heater battery from dust and to prevent it from being clogged, an
air filter (accessories LFBR 160 Ref.no.: 8578) must be installed before the EHR-R.
6
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
ATTENTION
General details about the use of a electric pre-heater battery
The pre-heater is equipped with two thermal cutouts, the automatic thermal cutout (operating temperature) is controlled by the electronics. If the temperature in the duct system rises more than +50 °C, the thermal cutout opens, at the
same time a LED code (see point 6.7) is displayed at the controller KWL-BU 270/370 and the supply fan is running for
1 minute on the highest speed. The thermal cutout with manual reset which opens at 120 °C is connected directly to
the supply line of the heater battery, in order to guarantee a safe circuit breaking in the event of error. The installation
and operating instruction (No. 91560) EHR-R models is to be adhered to. The wiring is carried out to wiring diagram
SS-942.
If a electric pre-heater battery is installed, the duct must be at least 1 m before and after the heater battery
from heat resistant and/or not inflammable material (e.g. folded spiral-seam pipe)
3.1.4 Bypass function „Summer operation“
The bypass function allows a reduction of the supply temperature and provides through bypassing the heat exchanger
by means of two shutters, rotating in opposite directions, for a pleasant room climate.
Bypass closed: Outside air is led over heat exchangers into the room (heat recovery active)
Bypass open: Outside air is led directly into the room (heat recovery inactive), indirect cooling of ambient air
fig.12
fig.13
Bypass cover closed
Bypass cover opend
– Operational description “Bypass”:
If the KWL is supplied with mains voltage, the bypass cover closes completely (Fig.12)
The bypass temperature (extract air temperature T3) is set at the potentiometer (Fig.14/15). A deactivation of the
bypass function is via potentiometer setting “OFF” (factory setting) possible (Fig.15).
fig.14
ƒ&
* )
)
*
Potentiometer
ƒ&
fig.15
ƒ&
ƒ&
ƒ&
ƒ&
2))
ƒ&
ƒ&
*
ƒ&
ƒ&
The bypass is opened, if all conditions are fulfilled:
Condition 1: The extract air temperature (sensor T3) is higher than the bypass temperature (Fig.15).
Condition 2: The outside air temperature (sensor T1) is lower than the extract air temperature (sensor T3)
Condition 3: The outside air temperature (sensor T1) is higher than the outside air temperature limitation
(factory setting +15°)
The bypass is closed, if condition 4 and 5 or 6 and 7 are fulfilled:
Condition 4: The extract air temperature (sensor T3) is lower than the bypass temperature which is reduced by 2°.
Condition 5: The bypass is opened or
Condition 6: The outside air temperature (sensor 1) is lower than the outside air temperature limitation, which is
reduced by –2°C.
Condition 7: The bypass is opened.
7
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
3.1.5 Frost protection cross counterflow heat exchanger
The frost protection function prevents an icing up of the cross counter-current heat exchanger, if the preheating is not
attached or the heating energy is not sufficient.
- Operational description:
The frost protection is active, if following conditions are fulfilled.
The effects depend on the respective unit configuration (Passive House or DIBt):
Condition I: The extract air temperature (sensor T4) is lower by 2 °C than the heat exchanger frost protection (factory
setting +3 °C) and is measured longer than 2 min..
Configuration Passive House: Preheating is switched off and the supply air fan is operated for safety reasons for 1 min.
on highest ventilation level, afterwards the extract air fan is active. If the extract air temperature rises above the heat
exchanger frost protection temperature the normal operating condition is activated.
Configuration DIBt: The air flow volume of the supply air fan is reduced by 50 %. If the extract air temperature does not
rise within 5 min. above the heat exchanger frost protection temperature, e.g., at extremely low outside temperatures
<-15 °C, the preheating is switched off and the supply air fan is operated for safety reasons for 1 min. on the highest
ventilation level and is then switched off. The exhaust air fan remains active, in order to warm up the heat exchanger. If
the extract air temperature rises above the heat exchanger frost protection temperature, the normal operating condition is restored.
NOTE
☞
Frost protection for downstream water heater battery
If the supply air temperature drops below +5° C, the supply air fan is switched off. At the controller an error message
“LED code” is displayed.
3.1.6 Alarm Output
Function setting of different parameters (floating output!)
3.1.7 External signal (contact)
Function setting of different parameters (floating output!)
Assignment
“DIP switch”, see wiring diagram SS-942
DIP-Schalter
1.1 1.2
2.1 2.2
on
on
off
off
Funktion, siehe MBV
*faytory settings
DipNo. 1 No. 2 Assignment
Description
switch
to the function
1
off
off
If the switch is OFF the unit is in standby mode (step 0), but the protective
functions (e.g. heat exchanger frost protection) remain active. If the switch
is ON the unit is running.
1
on
off
If the button or switch is operated for a maximum time of 2 seconds, the
unit operates at the highest fan speed for 15 minutes. If the connection
time lasts for more than 2 seconds, the unit will continue operating at the
highest fan speed until manually deactivated. If the switch is OFF it will
return to the previous setting.
1
off
on
1
on
on
2
off
--
2
on
--
2
--
off
2
--
on
External
Signal
If the button or switch is operated for a maximum time of 2 seconds, the
unit operates at the highest fan speed for 30 minutes. If the connection
time lasts for more than 2 seconds, the unit will continue operating at the
highest fan speed until manually deactivated. If the switch is OFF it will
return to the previous setting.
If the switch is ON the bypass is opened. If the switch is OFF the bypass is
closed.
Unit
configuration
The unit is operating according to Passive house criteria, see relevant
documentation and test requirements of the PHI.
The unit is operating according to DIBt criteria, see relevant documentation and test requirements of the DIBt.
Alarm output
Relay output if unit is on.
Relay output during failure at the unit (not working fan, failed frost protection of heat exchanger)
8
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
CHAPTER 4
4.0
SPEED CONTROLLER
Integrated speed controller KWL-BU 270/370
The passive-house compact unit is controlled via speed controller KWL-BU 270/370, integrated in the front panel.
It allows three freely definable speed operations, which can be set via a potentiometer.
Via potentiometer "Ofs" a deviating speed ratio of extract to supply fan in the range ± 10 % can be set.
➀ Sliding switch
➁ Scale speed step S1-S3
➂ Error display
“LED code” see point 6.7
➂
➁
➀
Potentiometer:
➀
➁
➂
➃
Step S1
Step S2
Step S3
Offset „Ofs“
➂
COM
➁
TIP: Voltage metering:
➀
➃
Via COM and A the output voltage of the supply air fan in the
adjusted operating level can be
measured.
4.1
A
Setting range of power steps
The speed controller KWL-BU 270/370 has 4 potentiometers:
Description potentiometer
Scale
Description
Setting range
S1
Speed step 1 of supply air fan
2,5 bis 5,0 Volt
S2
Speed step 2 of supply air fan
5,5 bis 7,5 Volt
S3
Speed step 3 of supply air fan
7,5 bis 10,0 Volt
Ofs
Offset* for extract air fan
± 10 %
*Offset = Deviation of extract air fan to supply air fan
See also item 5.2 „ Adjustment“
9
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
CHAPTER 5
5.0
Components
fig.16
COMPONENTS, DIMENSIONS, PERFORMANCE
CURVES
KWL
.:/EC
(&270/370
ECO
(&2right/left
5HFKWV/LQNV
Pos.
Benennung
3RV %HQHQQXQJ
Art.-Nr.
Pos.3RV
Benennung
$UW1U
%HQHQQXQJ
)LOWHU
*air
=XOXIW
11 Centrifugal
5DGLDOYHQWLODWRU
Supply
filter G4
09613
fan
)LOWHU * %\SDVV
‡ 5DGLDOYHQWLODWRU ‘ .:/ (& Bypass air filter G4
09617
Centrifugal fan
:lUPHWDXVFKHU
‡ 5DGLDOYHQWLODWRU ‘ .:/ (& Heat exchanger
84695
fan
0RWRUHLQKHLW
NSO (&2
Centrifugal
%HGLHQHOHPHQW
(&2
unit ECO.:/ (& (&2 5HFKWV------ECO
‡ Motor
0RWRUHLQKHLW
12 Controller
5DKPHQ
IU %HGLHQHOHPHQW
‡ · Motor
0RWRUHLQKHLW
.:/
(& 13 Controller
*HKlXVHWU
unit (KWL
EC 270
ECO(&2
right)/LQNV 84696
frame (&2
‡ 0RWRUHLQKHLW .:/ (& (&2 5HFKWV
‡ *HKlXVHWU .:/ (& (&2 5HFKWV
· Motor unit (KWL EC 270 ECO left)
84697
14 Casing door
‡ 0RWRUHLQKHLW .:/ (& (&2 /LQNV
‡ *HKlXVHWU .:/ (& (&2 /LQNV
· Motor unit (KWL EC 370 ECO right)
84698
· Casing
door (KWL EC 270/370 ECO right)
+DXSWSODWLQH
(&2 EC 370 ECO left)
· Casing
.RQGHQVDWDEODXIVFKODXFK
· Motor unit (KWL
84699
door (KWL EC 270/370 ECO left)
:DQGEHIHVWLJXQJVVFKLHQH 2EHQ
5
------------15 Condensate drain pipe
:DQGEHIHVWLJXQJVVFKLHQH 8QWHQ
6LFKHUXQJ 7\S 09 [
6 Mainboard ECO
86670 16 Condensate
drain pipe
.OHPPHQNDVWHQ
*HKlXVH (&2
17 Upper
.OHPPHQNDVWHQ
(&2
7 7UDQVIRUPDWRU
------------wall mounting'HFNHO
rail
wall mounting rail
8 Fuse Type: M315/250V - 5x20
84704 18 Lower
1
2
3
4
Art.-Nr.
$UW1U
----
84707
84708
86672
84709
-----
84710
84711
-----
84714
84715
84716
9
-------
-------
19
Terminalbox casing cover
18211
10
Transformer
84706
20
Terminalbox casing cover
18212
-
-------
-------
21
-------
------
fig.: left-hand side unit
10
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
Dimensions
fig.17
KWL EC 270/370 Eco R right-hand side unit
exhaust
air outside
air
)RUWOXIW
$XVVHQOXIW
5.1
back side
front
supply
=XOXIW air
extract
$EOXIW air
condensation
outlet
.RQGHQVDWDEODXI
Dimmensions in mm
5.2
Adjustment
Adjusting the performance curve values, indicating the recommended ventilation area.
∆pfa
Pa
KWL EC 270 Eco
Recommended:
Basic ventilation area
Rated ventilation area
Intensive ventilation area
∆pfa
Pa
V· m3/h
KWL EC 370 Eco
Recommended:
Basic ventilation area
Rated ventilation area
Intensive ventilation area
V· m3/h
Example:
calculation I =
air flow rate max. - air flow rate min.
control voltage 10V - control voltage 1,7V
calculation II =
debit air flow rate - air flow rate min.
calculation I
required control voltage = control voltage 1,7V + calculation II
11
air flow rate
[m³/h]
85
90
100
120
140
160
180
200
220
240
260
280
300
315
340
360
385
KWL EC 270 Eco KWL EC 370 Eco
[VOLT]
2,5
2,5
3
2,7
3,7
3,2
4,3
3,7
5
4,3
5,6
4,8
6,3
5,3
6,9
5,8
7,6
6,3
8,2
6,8
8,9
7,3
9,5
7,8
10
8,2
8,9
9,4
10
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
6.0
CHAPTER 6
SERVICE AND
MAINTENANCE
WARNING
Service and maintenance
All work must be carried out with the equipment fully isolated from the power supply!
Danger by electrical impact, mobile parts (fan) and hot surfaces.

6.1
Cross counterflow heat exchanger
Open both upper snap-fits of front cover and remove this. Pull-out heat exchanger from unit as shown in Fig. 18.
For cleaning vacuum the fins with a vacuum cleaner.
NOTE
☞
Do not clean cross counterflow heat exchanger with water !
NOTE
☞
When installing insert heat exchanger into guide rail and push up to limit stop (Fig.19).
Pullout-strip may not rest on seal! (Fig.18, Pos.1)
fig.18
fig.19
Pull out strip
Pos.1
6.2
NOTE
☞
Filter change
In order to change the filters open both upper snap-fits of front cover and remove this. The inspection opening at the
front of the compact unit permits an easy filter change of outside, extract and bypass filter (Fig.20). Optionally are supply
and bypass filter in class F7 available (Fig.7)
When using F7 filters, pay attention on air flow direction arrows on the filter labels! The air flow direction is
shown on the unit label (Fig. 21).
fig.20
fig.21
Bypass filter
sticker
Extract filter
F7-Bypass filter
F7-Supply filter
Outside filter
– Filter
The KWL compact unit is equipped with outside and extract air filter class G4 as standard (to DIN EN 13779).
• Outside air/extract air
Spare filter G4
Spare filter fine filter F7
Bypass filter G4
Bypass filter F7
NOTE
☞
ELF-KWL 270/370/4/4
ELF-KWL 270/370/7
ELF-KWL 270/370/4/4 BP
ELF-KWL 270/370/7 BP
Ref.no.
Ref.no.
Ref.no.
Ref.no.
09613
09614
09617
09618
The filters are to be checked regularly (factory setting every 6 months) depending on the degree of pollution
(development of mildew), to be cleaned if necessary. By vacuuming once or after a maximum of 1-year operation they must be replaced for hygienic reasons.
If the filters should be moist or mouldy, they must be changed immediately!
12
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
ATTENTION
6.3
Condensation outlet
In connection with maintenance, e.g. in autumn before beginning of the heating season, make sure that the condensation outlet (Ø 10 mm) in the bottom reservoir is not clogged (Fig.6). You may check it by pouring a little water into the
reservoir.
Do not let water flow into electrical parts !
6.4
Access to internal terminal box
The inspection opening on the side (Fig.22) to the internal terminal box guarantees free access to the electronics (fuse
or DIP-switch setting (Fig.23)). The inspection opening of the right hand version is located on the left side, with the lefthand version on right side.
☞
fig.22
fig.23
Fuse
DIP-Switch
6.5
NOTE
☞
Dismounting EPS-interior with motor unit
In order to dismount the EPS-interior (with motor and heat exchanger unit), the intermediate panel in the casing (six screws) must be removed (Fig.24).
Before pulling out the EPS-interior, take off condensate hose (Fig.25).
fig.24
NOTE
☞
fig.25
Hold the heat exchanger guide rails and pull out the EPS-interior from the metal casing (Fig.26).
The connection cable has to be pulled along eventually.
Do not pull on the leading edges of the EPS-interior, since these can break out!
Unplug it and remove EPS-interior (Fig.27).
fig.26
13
fig.27
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
6.6
Installation of EPS-interior with motor unit
Proceed when assembling the EPS-interior oppositional to point 6.5. Make sure the cables are installed properly (Fig.
28). Finally insert EPS-interior evenly to a complete stop into the casing (Fig.29).
fig.28
fig.29
Attach condensate hose (Fig.30) and lay it in the intended guide groove (Fig.31).
fig.30
6.7
6.8
fig.31
Error message „LED code“
Following warning and/or alarm references („ LED code “within 5 sec.) are selected:
Time code
Error message
(Time period 5 sec.)
Cause
Reset
1x
speed monitoring
supply air fan
2x
speed monitoring
extract air fan
– defective motor
– defective impeller
– cable break
switch sliding switch within
of 1 sec. back from step 1
to 3 to1
3x
thermal cutout (STB) Pre-heater
has released
– polluted filter
– to low air flow rate
– defective main board
reset only via mains cut-off
possible! (see instruction
manual EHR-R)
4x
supply air temp. below +5 °C
serves only as reference
5x
frost protection heat exchanger
self-dependant
(see point 3.1.5)
self-dependant
Permanence
sensor break
– polluted filter
– to low air flow rate
– defective main board
– extract-,supply-, or outside switch sliding switch within
air sensor not connected or of 1 sec. back from step 1
defective
to 3 to 1
Accessories
EHR-R 1,2/160
LFBR 160 G4
Ref.-No. 9434
Ref.-No. 8578
14
pre-heater battery 1,2 kW, diameter 160 mm
pre-filter for pre-heater battery
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
6.9
Wiring diagram SS-942
fig.32
4
8A/250V
/AC1
6
5
7
6
7 9 10
T5
4
13 14
2
11 12
red
rot
1
Main
board
Hauptplatine
inimthe
unit
Gerät
RJ12
N
T6
L
T6
3
black
schwarz
2
T5
1
RJ
RJ 12
12input
Eingang
Bypass
Bypass
Setting
Einstellung
blue
blau
KWL EC 270/370 Eco
Terminal box at am
the unit
Klemmkasten
Gerät
6
Optional:
Optional:
To be made
Bauseits
bei
with room air
Raumluftdependent
abhängigen
fire places on
Feuerstätten
site!
zu erstellen !
PE
3 x 1,5mm²
Externes Signal,
External signal
Funktionseinstellung
über Software.
Functional
setting via Software.
Potentialfreier Kontakt !
Dry contact!
L1 N
Supply,
230V~
Zuleitung,
230V~
Alarm
Alarm Kontakt,
floating output potentialfreier Ausgang
VDE 0700 T1 7.12.2
Pre-heating
(max (max
1,2 kW
/ 230V~)
Vorheizung,
1,2kW
/ 230V~)
external element externe Komponente
optional
Optional:
on/off
Bauseitiger
switch
Trennschalter /
on site
On/off
switch
STB -- Sicherheits
Saftey temperatur
cut-out.
STB
Temperatur
Begrenzer,
Input
of heater
Eingang
der control.
Heizungsüberwachung.
Dry contact!
Potentialfreier Kontakt !
RJ12
Signal
device,
dersaftey
SicherheitsSignal of
see installation
and
siehe
einrichtung,
operating
instructions
MBV-Montage
und
Betriebsvorschrift
Example
heating connection
Beispiel Heizungsanschluss
8
KWL EC ... Klemmkasten
Terminal box
L
N
6
4
optional
(z.B. 10A)
13 14
1 2
3 4
5 6
Pre1,2kW
Vorheating
Heizung
85105 001 SS-942 17.12.10
15
10 kOhm
Controller
Bedienelement
KWL-BU 270/370
Setting ofder
Einstellung
bypassTemperatur
Bypass
temperature
Bedienelement ist
Controller
im Lieferumfang
ready
wired,
fertig verdrahtet !
included in
delivery
Potentiometer ist
im Lieferumfang
Potentiometer
fertig verdrahtet !
ready wired,
included in
delivery!
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
6.10 Wiring KWL EC... Eco
fig.33
Terminal box at the
Klemmkasten
amunit
Gerät
External
SS-942
Externerconnection,
Anschluss,see
siehe
SS-942
Mounting
plateim
in the
unit
Trägerblech
Gerät
11 9 7 5 3 1L X9 (unten)
(bottom)
terminal box
Klemmkasten
14 13
motor Zuluft
supply air
Motor
X3.STB
9
motor Fortluft
exhaust air
Motor
12 10 8N 6 4 2 X8 (top)
(oben)
N
N
X3.STB
10
X10
S1, Tür-Endschalter
Door limit switch
S1,
ExternalAnschluss
connection
Externer
Internal Anschluss
connection
Interner
6
S1
8
X1.14
4
X2.11
PE
X3.Ext.
2N 4 6 8 X7 (oben)
(top)
2
number
wire
Drahtnummer
3
X2.12
X2.U3
S1
7
5
X3.Ext.
(bottom)
1L 3 5 7 X6 (unten)
1
Drahtnummer
wire
number
X6.1 X7.2
X2.U2 X1.N
NTC-sensor
NTC-Fühler
X2.U1
X1.N
M1
EC
X1.N
M2
EC
PE
blau
transformer
Trafo
Sekundär
secondary
T5
T6
extract
Abluft
T6
yellow
gelb
0-10 V
exhaust
Fortluft
Drehz.Rückm. air
fan
Ventilator
GND
0-10 V
supply
Zuluft
Drehz.Rückm. air fan
Ventilator
GND
withe
weiß
blue
blau
U3
L
Tr.Sek.
extract
Abluft
withe
weiß
heating
Heizung
T5
ws
yellow
gelb
X2.U1
Fortluft
supply
Zuluft
blue
blau
PE
Fortluft
outside Fortluft
Außenluft
exhaust air
supply
Zuluft
Tr.Sek.
NTC-sensor
NTC-Fühlersupply
Zuluft
NTC-sensor
extract
air
NTC-Fühler
Abluft
outside NTCAußenluft
NTC-Fühler
PE
X2.L X1.N
sensor
sw
Außenluft
outside
air
rot
Main board
Hauptplatine
in the
unit
im
Gerät
S1,
Tür
DoorEndschalter
limit switch
T1,
Extra
transformer
Zusatz
Trafo
10 kOhm
schwarz
Poti,
Bypass
X5
U3S
X6.3
N
U3S
transformer
Trafo
U2
L
L
(inside)
X4 (innen)
Pre-heating
Vor - Heizung,
externe Komponente
external
element
Trafo
N
Zusatz-Trafo
T1, T1,
Extra
transformer
S1
N
S1
Main
air
T1 - outside
Außenluft
T2 - supply
Zuluft air
T3 - extract
Abluft air
T4 - exhaust
Fortluft air
L
315mAT/250V~
Relais 1
N
N
Hauptsupply
Versorgung
board
Platine
L
U1
Zul. br.
N
Zul. bl. Versorgung
Supply
U1
For. br.
N
For. bl.
11
X7.4
N
12
X6.5
14
L
24 V
0-10 V
Ventilatoren
fans
GND
X7.8
Ext.
X6.7
Ext.
X10.14
STB
X10.13
STB
optional
extern
optional
extern
optional
extern
optional
extern
Motor 12V+/-
ws
external
control
Externes
signal
Steuersignal
Feedback
Rückmeldung
Saftey
temperature
cut-out Begrenzer
Sicherheits
Temperatur
rt
Bypass
sw
Bypass Bypass
Relais 4
Alarm
GND
(outside)
X3 (außen)
DIP-Schalter
DIP-Switch
1.1 1.2
14
2.1 2.2
on
on
off
off
functions, see
instructions
Funktion,
siehe
MBV
85124 001 17.12.10
16
X2 (top)
(oben)
X1 (bottom)
(unten)
X7.6
Installation and Operating Instructions
Passive-house compact units KWL EC 270/370 Eco
E
Notes:
17
All pictures without engagement!
Please keep this manual for reference with the unit!!
Print-No.: 86 906/08.11
www.heliosfans.co.uk
Service und Information
D HELIOS Ventilatoren GmbH & Co · Lupfenstraße 8 · 78056 VS-Schwenningen
CH HELIOS Ventilatoren AG · Steinackerstraße 36 · 8902 Urdorf / Zürich
A HELIOS Ventilatoren · Postfach 854 · Siemensstraße 15 · 6023 Innsbruck
F
HELIOS Ventilateurs · Le Carré des Aviateurs · 157 avenue Charles Floquet · 93155 Le Blanc Mesnil Cedex
GB HELIOS Ventilation Systems Ltd. · 5 Crown Gate · Wyncolls Road · Severalls Industrial Park ·
Colchester · Essex · CO4 9HZ