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11
KOMFORT LE
Control system general description.
The unit is controlled with a wall-mounted control panel, fig. 12. The
communication circuit is presented with a four-wire data cable up to 10 m.
The control system controls the air flow of the supply and extract fan
in three speed stages:
•
low speed is used for ventilation in non-residential premises during
weekend or in residential premises during night time.
•
medium speed is used for the rated ventilation mode.
•
high speed is used for high-power ventilation with extra air flow.
The temperature sensors are used for correct selection of the operation
mode and maintaining set air temperature in the air duct.
The temperature sensor is integrated into the control panel and is used
to maintain the set indoor temperature at set air flow or in compliance with
the selected service function, see below.
The correct operation mode selection as well as indication of the
current parameters as indoor temperature, set temperature, fan speed stage,
heater power are displayed on the LCD display.
The program of the balanced energy saving calculates the heater
capacity required to maintain indoor air temperature with accuracy up to 1 °C
and heating output control with accuracy up to 1%.
The air bypass damper is used for heat exchanger frost protection
during low outside temperatures. In ventilation mode without heating the
bypass damper is used to cut off supply air delivery and enable no heat
recovery ventilation mode.
The control system monitoring program is used to track the operation
parameters. In case of emergency like heater overheating, communication
circuit break, the control system is cut off and the alarm information is
displayed on the control panel.
The filter replacement warning is shown on the display with set
periodicity.
All user settings are saved in the non-volatile storage of the control
panel.
The temperature sensors are supplied pre-wired.
The connections to the controller circuit board are shown in fig. 11.
Terminal block on
the control panel
yellow
+
green
В
brown
А
white
Data cable
Socket connector for
outdoor air temperature
sensor
1
2
3
4
Socket connectors on
the controller circuit
board
yellow
1
green
2
brown
3
white
4
CONTROLLER CIRCUIT BOARD
WALL-MOUNTED CONTROL PANEL
Socket connector for
supply air temperature
sensor
Fig. 11. Control panel mounting
Fig. 12. Control panel mounting
UNIT CONTROL
3
4
5
6
7
8
1
2
9
1. Control panel display.
2. The glowing red LED light indicates an alarm situation. The blinking red
light indicates the need to replace the filter.
3. Temperature sensor.
4. «Up» button is used to select a menu item by moving upwards or to increase
a current parameter.
5. «Down» button is used to select a menu item by moving downwards or to
decrease a current parameter.
6. «Enter» button is used to select a parameter to be edited or to move one
level down in a list (in the working window it means menu access).
7. «Escape» button is used to move to a higher level up (in the working
window it means interface language editing).
8. «Power» button is used to operate the unit status (turned on/off).
9. The green LED light indicates an operation status of the unit. The indicator
glows during the heater shutdown and is off when the unit is off.
KOMFORT_LE_v2(2)_EN.indd 11
10.08.2015 12:00:46
