Hoval RoofVent KG, Original Operating Manual, Page: 33 / 40

■ Design without Air-Injector:
– Install the enclosed supply air temperature sensor in the supply air duct and
wire it up to the connection box.
■ ColdClimate design:
At low outside temperatures, a cold start of the fans can cause damage to the
unit. Therefore:
– A continuous power supply for the fans must be ensured so that they do not
cool down too much.
– After a power failure, there is a waiting period of 20 minutes before the fans
start up again.
5 6
3 4
2
1
■
1
Control block
■
2
Connection box
■
3
Zone bus
■
4
Power supply RoofVent ®
■
5
Supply air temperature sensor
■
6
Actuator Air-Injector
Fig. 31: On-site electrical connection
(components vary depending on unit type)
1
2
5
3
4
■
1
Actuator Air-Injector
■
2
Supply air temperature sensor
■
3
Power supply RoofVent ®
■
4
Zone bus
■
5
Connection box
Fig. 32: Cable routing on the below-roof unit
(components vary depending on unit type)
Temperature sensors
The room air sensor and the fresh air temperature sensor are supplied loose in the
control panel:
■ Install the room air temperature sensor at a representative position in the
occupied area at a height of about 1.5 m. The measured values must not be
distorted by the presence of sources of heat or cold (machines, direct sunlight,
windows, doors, etc.).
■ Install the fresh air temperature sensor at least 3 m above the ground on a
north-facing wall, so that it is protected from direct sunlight. Provide cover for
the sensor and thermally insulate it from the building.
33
RoofVent ® KG
Operating instructions
Transport and installation
4 220 755-en-00