Velleman VMB1TS - Manual (Page 41)

VMB1TS manual – edition 2 41
Passive cooling of a bedroom
During summer time the bedroom is cooled via a fan that extracts air from a cooler room.
Mount a temperature sensor in both rooms. The temperature sensor of the bedroom is set to cooling mode and the
cooling output is linked to a relay channel that controls the fan.
When the temperature in the cooler room is about 3 degrees lower than the bedroom temperature the fan is activated.
Configuration:
The easiest way to configure the system is to use the Velbus link program via a PC connected on the Velbus PC
interface (VMB1USB, VMB1RS of VMBRSUSB).
However, configuration can also be done without the aid of a computer. Refer to the procedure below.
1. Link the cooling output of the bedroom sensor to a relay channel.
2. Use the relay channel to control the fan.
3. On the temperature controller, select the sensor of the coolest room.
4. Go to the extended menu.
5. Scroll to the sensor setup menu and select it.
6. Scroll to the ‘diff. sensor’ submenu and select it.
7. Choose the bedroom sensor and confirm.
8. Scroll to the ‘Temp. diff.’ submenu and select it.
9. Set the temperature difference to 3° and confirm.
10. Quit the menu.
11. Select the bedroom sensor on the temperature controller
12. Go to the extended menu.
13. Scroll to the sensor setup menu and select it.
14. Select the operating mode submenu.
15. Set it to cooling and confirm.
16. Quit the menu.
The configuration is now finished and the differential thermostat is enabled.
Remark:
The cooling will stop when the bedroom temperature reaches the preferred setting of its selected mode (anti-freeze,
night, day or comfort).
Cooler room
Bedroom