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www.blaubergventilatoren.de
KOMFORT EC SKE270-1.5
Fig. 1. Unit design and operating logic.
DESIGN
The double-skinned unit casing is made of polymer-coated steel plates,
internally heat- and sound insulated with a 15 mm polypropylene foam layer.
The unit includes an integrated kitchen hood with control buttons on the
front panel. The mounting brackets on the casing ensure easy installation.
The spigots for connection to the air ducts are located at the side of the unit
and are equipped with rubber seals for airtight connection to the air ducts.
The front service panel of the casing ensures easy access to the unit internals
for service works including cleaning, filter replacement, etc.
The unit is equipped with high-efficient external rotor EC motors and
centrifugal impellers with forward curved blades. The integrated EC motors
have the best power consumption to air capacity ratio and meet the latest
demands concerning energy saving and high-efficient ventilation. EC motors
are featured with high performance, low noise level and totally controllable
speed range. The impellers are dynamically balanced.
The unit is equipped with a high-efficient counter-flow polystyrene
heat exchanger with a large surface area. The air flows are fully
separated within the heat exchanger. Odour and contaminants
contained in the extract air are not transferred to the supply air flow.
The electronic frost protection system is used to prevent the heat
exchanger freezing in cold seasons. In case of heat exchanger freezing
danger communicated by the temperature sensor the supply fan is stopped
to let warm extract air warm up the heat exchanger. After that the supply
fan is turned on and the unit reverts to the normal operation mode. If air
temperature in the intake air duct upstream of the heat exchanger is from
-7 °C up to -15 °C the unit is switched into automatic control mode, i.e.
the supply fan turns off for 5 minutes and operates for 25 minutes. If the
outdoor temperature is below -15 °C the supply fan turns off for 5 minutes
and operates for 15 minutes.
The drain pan under the heat recovery unit is used for condensate collection
and drainage.
The unit is equipped with an electric heater for operation during cold
seasons at low outside temperature. The integrated electric heater is activated
to warm up supply air up to +30 °C if set indoor air temperature may not be
reached by means of heat recovery only. Once the set temperature is reached
the electric heater turns automatically off. The electric heater is equipped
with two integrated overheat protection thermostats, one of safety type
actuated at +50 °C with automatic restart and the other one of alarm type
actuated at +90 °C with manual restart.
The built-in G4 pocket supply filter and G4 pocket extract filter provide
efficient air filtration. Optionally, a F7 supply filter may be used. The kitchen
hood has a multilayer fat aluminium filter.
The unit includes an integrated controller, a multifunctional control panel
with LCD display and a remote controller. The delivery set includes a 10 m
long cable for connection of the control panel to the unit.
OPERATING LOGIC
Clean cold air from outside flows to the heat exchanger, where from it is
moved to the room with the supply fan.
Warm stale air is extracted from the room with the exhaust fan and is moved
through the air ducts to the heat exchanger, where is transfers its heat energy
to the intake air. After that it is exhausted outside.
Heat energy of warm and humid extract air is transferred to the cold intake
air. The air flows are fully separated within the heat exchanger.
Heat recovery minimizes heat losses caused by traditional window
ventilation and saves energy.
In summer the heat exchanger performs reverse and
transfers cold air from the cooled extract air for warming up intake air.
This contributes to better performance of the air conditioner in ventilated
premises.
During operation of the kitchen hood the extract air is exhausted through
the bypass air duct and does not come in contact with the heat exchanger.
SUPPLY FAN
HEAT EXCHANGER
EXHAUST FAN
DRAIN PAN
SUPPLY FILTER
INTEGRATED CONTROL UNIT
HEAT EXCHANGER FREEZE
PROTECTION TEMPERATURE SENSOR
EXTRACT FILTER
ELECTRIC HEATER
KITCHEN HOOD DAMPER
(AIR BYPASSING FROM THE KITCHEN
HOOD)
KITCHEN HOOD
min 1 m
SUPPLY AIR TEMPERATURE
SENSOR
EX
TR
AC
T AIR
INT
AKE AIR
EXHA
UST AIR
SUPPL
Y AIR
KOMFORT_EC_SKE270_v2(4)_EN.indd 4
07.08.2015 14:25:41
