eCO Side - Installation and Maintenance Manual
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FläktGroup DC_10176GB_20180924_R3
Specifications are subject to alteration without notice
10.1 ROTOR, HEATING AND COOLING
The unit is configured differently regarding to heating, heat
re covery and cooling, see below.
HEATING
• No heater
• Electrical post heater
• Hot water coil
HEAT RECOVERY
• Step less rotary heat exchanger
COOLING
• No cooling
• Water
• DX, On/Off
CONTROL FUNCTION
The control function works as follows:
Regardless of control mode the unit tries to achieve the desired
setpoint.
This is done by the unit depending on the needs, demand for heat
recovery, heating or cooling. Built into the system is also a dead
zone. The dead zone function (usually 2°C) acts as a temperature
zone between heat recovery and cooling where neither calls for
heat recovery or cooling.
Figure 1. The figure shows the controller’s output signals to the various
components at different temperatures. The figure also shows two
temperatures, one for heating (T2) and one for cooling (T3). The zone
between T2 and T3 is called the dead zone. Note that heating is
activated only when heat recovery is working at 100%.
10. CONTROL FUNCTIONS
10.2 TEMPERATURE CONTROLS
eCO Side has three temperature control options, supply air, ex-
tract air and room.
Room control and extract air control is the same control type with
the difference that in combination with room control an external
room sensor is needed (separate ordering code). In addition it is
possible to use outdoor temperature compensation. This control
mode cannot be combined with extract air control or room con-
trol.
The unit is configured for supply air control as standard. To obtain
other control modes, first the controller must be changed from
standard mode to cascade mode. Then control mode is selected
by changing the cascade reference to extract air control/room
control (0) or outdoor temperature compensation (1). Below is a
description of the different control modes.
SUPPLY AIR CONTROL
To maintain a constant supply air temperature, the controller
works with the setpoint and the supply air temperature. Based on
these parameters, the current heating, heat recovery and cooling
sequences are controlled.
EXTRACT AIR CONTROL
The extract air temperature gives a good average value of the
temperature in different rooms. Using this the unit controls the
supply air temperature to maintain the extract temperature at a
desired level.
This method is suitable for ventilation systems that supply a
number of similar rooms. In cases where different rooms have
different heating requirements, this method should not be used.
This is because the unit cannot detect the varying heating needs,
but can only read an average temperature.
The limits on the supply air temperature (min. temp. / max. temp.)
ensure that the supply air temperature is maintained within the
set range.
DEFAULT PARAMETERS FOR EXTRACT AIR CONTROL
1. Controller = 2
Selects cascade control
2. Cascade reference = 0 Selects extract air control
3. Cascade A = 0.5
When the sensor gets colder than
given setpoint value
4. Cascade B = –0.5
When the sensor gets warmer than
given setpoint value
5. Min. temp. = 15°C
Sets lowest supply air
temperature
6. Max. temp. = 03°C
Sets highest supply air
temperature
Heating
Reco
ver
y
Cooling
Control signal, %
Sequence control
Temperature, °C
100
50
T0
T1
T2
T3
T4
