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7.7. Other Control Functions
1. Remote unit control
Unit is provided with remote control possibility using external device (button, timer, other sensor), which is connected
to the contacts 17, 18 (see chapter 6.3c Picture) or 27, 28 (see chapter 6.3 d Picture).
This function can perform one of two operations:
• remote unit switching on and off;
• remote unit intensity control (additional ordered function).
1.1. Remote unit switching on or off
If the unit is not operating according to programmed week schedule, by connecting (short-circuit) contacts 17, 18 (see
chapter 6.3 c Picture) or 27, 28 (see chapter 6.3 d Picture) unit will be switched on and will operate with the intensity set
in the menu window „Ventilation" (see page 50); by disconnecting contacts unit operation will return to previous mode.
If unit is operating in auto mode with chosen intensity, to switch it off by remote switch contacts 17, 18 (see
chapter 6.3 c Picture) or 27, 28 (see chapter 6.3 d Picture) must be connected (short-circuit).
Remote unit switching on and off is available only when auto mode is set!
1.2. Remote unit intensity control (OVR)
If this function is ordered in advance, unit intensity will be controlled by contacts mentioned above.
If contacts 17, 18 (see chapter 6.3 c Picture) or 27, 28 (see chapter 6.3 d Picture), are interconnected, the
fourth level of intensity will be activated, after disconnecting – unit will return to previous mode. Adjusting intensity
of the fourth level for supply and exhaust fans is performed in the „Ventilation" window, only when this function is
activated, i.e. when these contacts are short-circuited.
Remote unit intensity control has the highest priority and operates in every
mode, even the unit is switched off.
Note: This function is provided only for the units with EC fans.
2. Ventilation correction in the winter
In wintertime, when heating power is not enough and supply air temperature is below setting value, ventilation
intensity automatically is decreasing in one level. If there is not enough, one more level (up to minimum) till set
supply air temperature will be maintained.
3. Pump control
Units with water heater are designed with water circulation pump control. In winter pump operates continually, in
summer season it is off. When outdoor temperature is lower than 5 °C, pump is automatically turned on. Pump is
connected to the connection box contacts (see 6.3. chapter).
4. Cooling energy recovery
In summer when room temperature is lower than temperature outside, units with either plate heat exchanger or
rotary heat exchanger automatically operate with activated function of cooling energy recovery. This function is
not provided for OTK units.
5. Remote unit operation and failure indication
If the information about unit operation mode is requested (when unit is operating and when is not) indication de-
vice (for ex. bulb) must be connected to the contacts 33, 35 (see chapter 6.3 c Picture). In the connection board
(see chapter 6.3.) are provided contacts 33, 34 (see chapter 6.3 c Picture) or 29, 30 (see chapter 6.3 d Picture),
which are intended for connection of unit's emergency stop indicating device.
6. Summer night cooling
If the room temperature (exhaust air) in summertime is 5 °C higher than the setpoint and outside temperature
is between 12 °C and the setpoint, the ventilation level is automatically switched to the third intensity level at
00:15 am. The unit will operate in the third intensity level until 06:00 am or when outside air cools down (warms
up) too much or the room temperature equals the setpoint. The air is being cooled only by fans, without heat or
coolness recovery and additional air heating or cooling. When function is switched off the unit continues operating
in the previous mode.
Function starts operating automatically if only the unit operates in the first
or second ventilation intensity level. Function stops operating, when the
ventilation intensity level is being changed.
1
Additional ordered function.
2
Additional ordered function.
30
1
2
UAB AMALVA we reserve the right to make changes without prior notice
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