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KOMFORT EC S/SB(-E) S11
Service panel
Inspection door
Control panel
Supply fan
Extract fan
*Bypass damper
Supply air temperature sensor
Extract filter
Condensate drain pan
Control unit
Drain pipe
Counter-flow heat exchanger
Supply filter
Freeze protection temperature sensor
Outdoor temperature sensor
Electric lead-ins
The unit is equipped with a removable front service panel for maintenance and repair operations. The removable service panel design enables to
change the service side location.
The control unit is accessible for mounting and wiring operations through the inspection door on top of the unit. For accessing the control unit
remove the service panel after mounting and wiring operations. The control unit is accessible for service operations through the swivel mounting plate.
The power cable and ground cable are connected to the control unit via the cable entries. The difference between the supply and extract air flow
temperature leads to condensate generation. Condensate is collected in the drain pan and is removed outside through the drain pipe.
The bypass damper is open or closed depending on operation mode of the unit.
*The bypass damper is available for the models KOMFORT EC S/SB(-E) S11.
Accessories for the unit are available on a separate order:
• FS1
humidity sensor.
The unit with the installed humidity sensor maintains a set indoor humidity point. As the extract air humidity rises above
the set point, the unit fans switch to the maximum speed. As the humidity drops down below the set point the unit fans return to the previous
mode. The humidity sensor must be installed and connected by a service technician on site, page 8.
• EVH duct heater for supply air pre-heating.
The heater maintains the air temperature in the intake air duct at a point that prevents freezing of
the heat exchanger. A control system regulates heater operation. Mounting and connection of the heater, see page 8.
UNIT OPERATION MODES
Heat recovery
Warm extract air from the room flows into the unit and is cleaned in the extract
filter. Then the air is moved through the heat exchanger and is exhausted
outside with the extract fan.
Cold fresh air from outside flows into the unit, where it is cleaned in the supply
filter. Then the air flows through the heat exchanger and is moved to the room
with the supply fan.
Supply air is heated in the heat exchanger by transferring the heat energy of
warm and humid extract air to the cold fresh air. The air flows are fully separated
while flowing through the heat exchanger. Heat recovery minimizes heat losses,
which reduces the cost of space heating in the cold season.
Service side view
INTAKE AIR
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR
DESIGN AND FUNCTIONING
