SAVE VTC 500 SERVICE AND ACCESSORIES INSTALLATIONV01 20210316

Service
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4.3.1.2 Filters
The air filter captures dust, mold, pollen and other particulate matter.
The filters need to be replaced when polluted. New sets of filters can be acquired from your installer or wholesaler.
4.3.1.3 Defrost damper
The built in bypass damper (pos. 5 figure 5) 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.
4.3.1.4 Heat exchanger
SAVE VTC 500 is equipped with a counter flow heat exchanger. Required supply air temperature is therefore normally
maintained without adding additional heat.
4.3.1.5 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.
4.3.1.6 Temperature sensors
Three temperature sensors (NTC, 10 kΩ) are included in the unit from factory:
The sensors are wired to the main print card. See wiring diagram for more information.
4.3.1.7 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.
4.4 Electrical connections
Fig. 6 Print card position
The SAVE VTC 500 is wired internally at factory.
The electrical connection box can be found behind a cover
plate (pos. 1). The main circuit board (pos. 2) can easily
be taken out from the unit.
4.4.1 Main board layout
The SAVE VTC 500 is equipped with built-in regulation and internal wiring.
The figure shows the main circuit board. See wiring diagram for more information.
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