Service
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9.2.1.2 Filters
The factory installed filters are of filter quality F7 for the supply air and G3 for the extract air filter. The filters need to be
replaced when polluted. New sets of filters can be acquired from your installer or wholesaler.
Filter quality G3 can be installed for supply air filtering.
The filter type is labelled on the top of the filter
9.2.1.3 Heat exchanger
SAVE VSR 300/500 is equipped with a highly efficient, rotating heat exchanger. Required supply air temperature is
therefore normally maintained without adding additional heat.
The heat exchanger is removable for cleaning and maintenance, see “User Manual” for more information.
9.2.1.4 Main circuit board
The main circuit board controls all functions and the unit.
It is possible to connect external accessories to a free terminals on the main circuit board.
9.2.1.5 Connection box
Connection box is placed outside of the unit. It contains connection board. All external accessories can be connected to
the unit via connection board with freely configurable terminals.
9.2.1.6 Temperature sensors
Four temperature sensors (NTC, 10 kΩ at 25°C) are included in the unit from factory and positioned in the correspond-
ing air chambers.
The sensors are connected to the main print card. See wiring diagram for more information.
9.2.1.7 Humidity sensor
Relative humidity sensor (RHS) is included in the unit from factory and positioned in the extract air chamber.
The sensor is connected to the main print card. See wiring diagram for more information.
9.2.1.8 Electrical Re-heater battery
The re-heater battery is positioned in the supply air chamber.
The re-heater is activated by a relay and switches on if the supply air temperature is lower than the set point and
switches off if one or more of the following conditions are met:
1. If the supply air temperature is above the set point.
2. If the over heat protection is activated or the sensor is malfunctioning.
3. If the emergency thermostat is triggered or broken.
4. If the supply air sensor is in error state.
5. If the supply air fan is not running.
6. If the heater is set to disabled in the menu.
9.2.1.9 Overheat protection reset button
If the supply air temperature is low, it can indicate that the over heat protection is triggered. The overheat protection
can be reset by pressing the reset button .
The button is placed on the top cover.
211458 | A002
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