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6.2.1.2 Filters
The factory installed filters are of filter quality F7/ePM1 60% for the supply air and M5/ePM10 50% 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 F8/ePM1 70% can be installed for supply air filtering.
The filter type is labelled on the top of the filter
6.2.1.3 Defrost damper
The built in bypass damper (pos. 5 figure 9) is involved in defrosting, cool recovery, and supply air temperature control
of the unit. The damper motor is controlled by an analogue 0–10 V signal.
A test sequence which opens and closes the damper will occur if there is heating demand and after every power up of
the unit. An actuator drive detects if the bypass is able to close completely. If a signal is not detected within two mi-
nutes after the function test has been initiated, then the warning
Bypass Damper
appears in the HMI.
6.2.1.4 Heat exchanger
SAVE VTC 500 is equipped with a highly efficient, counter flow plate 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.
6.2.1.5 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.
6.2.1.6 Temperature sensors
Three temperature sensors (NTC, 10 kΩ) are included in the unit from factory:
• Supply air sensor (pos. 14 figure 9)
• Outdoor air sensor (pos. 15 figure 9)
• Extract air sensor (pos. 16 figure 9).
The sensors are wired to the main print card. See wiring diagram for more information.
6.2.1.7 Humidity sensor
Relative humidity sensor (RHS/EAT) is included in the unit at factory and positioned in the extract air chamber.
The sensor also measures the temperature of extracted air.
The sensor is connected to the main circuit board. See wiring diagram for more information.
6.3
Troubleshooting
If problems should occur, please check the items below before calling your service representative.
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