30
|
Service
8.2.1.2 Filters
The factory installed filters are of filter quality G4 for the supply air and G4 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 F7/M5 can be installed for supply air filtering.
The filter type is labelled on the top of the filter
8.2.1.3 Defrost damper
The built in bypass damper (pos. 5 figure 10) 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.
8.2.1.4 Heat exchanger
SAVE VTC 300 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.
8.2.1.5 Condensation tray and drainage
Depending on the relative humidity in the extract air, condensation may occur on the cold surfaces of the heat exchang-
er. The condensate water is gathered in the condensation tray (pos. 9 figure 10) in the bottom of the unit and is led out
through the drainage (pos. 10 figure 10) which are situated on each side of the heat exchanger. The drainage outlets
are size ½″ with outer threaded tube connections (chapter 5.3.1).
8.2.1.6 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.
8.2.1.7 Temperature sensors
Three temperature sensors (NTC, 10 kΩ) are included in the unit from factory:
• Supply air sensor (pos. 14 figure 10)
• Outdoor air sensor (pos. 15 figure 10)
• Extract air sensor (pos. 16 figure 10).
The sensors are wired to the main print card. See wiring diagram for more information.
8.2.1.8 Humidity sensor
Relative humidity sensor (RH) is included in the unit at factory and positioned in the extract air chamber.
The sensor is connected to the main circuit board. See wiring diagram for more information.
8.3 Troubleshooting
If problems should occur, please check the items below before calling your service representative.
211464 | A001
To Next Page
Loading...
Need help?
General