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KOMFORT EC DW
Fig. 1. Unit design and operating logic
DESIGN
The casing is made of double-skinned aluzinc panels, internally filled
with mineral wool layer 20 or 25 mm for heat- and sound-insulation. The
casing has mounting brackets with anti-vibration rubber mounts for easy
installation. The spigots are located at the sides of the unit and are equipped
with rubber seals for airtight connection to the air ducts. The service panel
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 backward curved blades.
The KOMFORT EC DW600/1000 models are equipped with high-
efficient counter-flow aluminium heat exchangers with a large
surface area. The KOMFORT EC DW2000/3800 models are equipped with
high-efficient cross-flow plate aluminium heat exchangers with a large
surface area. The air flows are fully separated within the heat exchanger.
Odours and contaminants contained in the extract air are not transferred to
the supply air flow. Heat recovery is based on the utilization of the thermal
energy of the extract air for heating up supply air. The process of heat transfer
proceeds in the heat exchanger where extract air transfers most of its heat
to the intake air flow. This reduces thermal energy losses in cold seasons. In
summer heat recovery acts reverse. The cooled extract air transfers part of
cold to the warm intake air. This contributes to better performance of the air
conditioner in ventilated premises.
The electronic frost protection system based on bypass and heater is used
to prevent the heat exchanger freezing in cold seasons. The bypass damper is
opened and the heater is turned on automatically according to temperature
sensor readings.
Cold intake air passes by the heat exchanger and is warmed up to set
temperature in the heater. Synchronously extract air that passes by the heat
exchanger is used for its defrosting.
After the freezing danger is over the bypass damper is
closed, the heater is turned off, the intake air passes through the heat
exchanger again and is warmed. The heat exchanger reverts to the regular
operation mode.
The drain pan under the heat exchanger block is used for condensate
collection and drainage.
The units are equipped with a water (glycol) heater for operation at low
outside temperatures.
The integrated water heater is activated to warm up supply air flow if set
indoor air temperature may not be reached by means of heat recovery only.
Smooth water heater control ensures automatic control of supply air
temperature.
The air temperature sensor downstream of the heater and the return
water temperature sensor are used for freezing protection of the water
heater.
The KOMFORT EC DW600/1000 models include built-in G4 (optionally
F7) pocket supply filters and G4 cassette extract filters. The KOMFORT EC
DW2000/3000 models include built-in G4 supply and extract cassette filters.
The unit incorporates an integrated control system with a wall-mounted
control panel with a sensor display. The standard delivery set includes a 10 m
cable for connection of the unit to the control panel.
KOMFORT EC DW600-2 ... KOMFORT EC DW1000-4
KOMFORT EC DW2000-2 ... KOMFORT EC DW3800-2
Supply filter
Control unit
Water heater
Heat exchanger
Extract fan
Supply fan
Extract filter
Heat exchanger
EXTRACT AIR
SUPPLY AIR
EXHAUST AIR
INTAKE AIR
INTAKE AIR
EXTRACT AIR
EXHAUST AIR
SUPPLY AIR
Supply fan
Water heater
Condensate drain pipe
Extract filter
Bypass
Control unit
Extract fan
Drain pan
Condensate drain pipe
Bypass air damper actuator
Heat exchanger
Supply filter
KOMFORT EC DW v1(6)_EN.indd 4
10.08.2015 10:11:01
