39
4.
5.
Fig. 39
Connecting air pressure switch and sensors
Air pressure switch (on site)
Fit the air pressure switch in rooms where open flue
combustion equipment operates.
Electrical connection
"Vitovent 300-W" service instructions
CO
2
/humidity sensor (accessories)
See page 37.
Connecting an external electric preheater coil
Additional external electric preheater coil (accessories)
for continuous operation of the ventilation unit when
outside temperatures are very low (application in pas-
sive houses). Installation in the outdoor air duct, close
to the unit connector.
For electrical connection, see page 37.
Power supply
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
Connect the power supply and implement all
safety measures in accordance with the follow-
ing regulations:
■
IEC 60364-4-41
■
VDE regulations
■
Connection requirements specified by your
local power supply utility
The Vitovent 300-W is delivered fully wired.
Insert the mains plug into a standard socket
(230 V/50 Hz) with separate fuse/MCB protection.
Note
If an air pressure switch is to be connected, observe
the air pressure switch connection diagram.
Air pressure switch connection diagram
"Vitovent 300-W" service instructions
Electrical connections
(cont.)
5793 589 GB
