Electrical Connections - SystemAir SAVE VTR 150/B Service & Accessories Installation Manual

Service | 25
4.3.1.3 Heat exchanger
SAVE VTR 150/B is equipped with a 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.
4.3.1.4 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.
4.3.1.5 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.
4.3.1.6 Temperature sensors
The sensors are connected to the main circuit card. See wiring diagram for more information.
4.3.1.7 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.
The sensor is used to measure the temperature and control the speed of the fans and humidity transfer of the rotary
heat exchanger.
4.3.1.8 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.
4.3.1.9 Overheat protection reset button
If the supply air temperature is low, it can indicate that the over heat protec-
tion is triggered. The overheat protection can be reset by pressing the reset
button.
4.4

Electrical connections

The SAVE VTR 150/B is wired internally from factory.
The electrical connection box can be found on the exhaust air outlet side of the unit. The print card can easily be taken
out from the unit, without using tools.
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