SAVE VTC 700 SERVICE AND ACCESSORIES INSTALLATIONV1

Service
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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 700 is equipped with a highly efficient, counter flow plate 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 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.
4.3.1.7 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.
4.3.1.8 Humidity sensor
Relative humidity sensor (RHS/EAT) is positioned in the extract air chamber and connected to the main circuit board.
See wiring diagram for more information.
4.4 Electrical Connections
Danger
• Make sure that the mains supply to the unit is disconnected before performing any maintenance or
electrical work!
• All electrical connections must be carried out by an authorized installer and in accordance with local rules
and regulations.
The SAVE VTC 700 is wired internally from factory. The electrical connection box is situated in the supply air fan com-
partment. Access the box according to below procedure.
1 Remove the front hatch by the use of an 8 mm Allen key, after which the
hatch is tilted back and lifted off completely.
2 Open the side panel by removing 4 screws.
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