22
6.5. ENABLING/DISABLING 0-10V INPUT
(external sensor) FOR AUTOMATIC MODE
In automatic mode, the air volume in the ventilation sys-
tem is regulated by an external 0-10 V signal. The input
signal 0 V corresponds to the humidity protection fl ow
rate. The input signal 10 V corresponds to the nominal
airfl ow rate.
20
21
20
1
2
M+P-26A-2061
1. Disconnect power supply from the ventilation system.
2. Remove screws Torx 10 (20) (Arrow 1).
3. Remove cover (21) (Arrow 2).
1
2
3
4
5
6
on
off
7
8
4. Set DIP switch 3 to “on.”
34
IN 24V
0
5. Connect external sensor (e.g. CO2, humidity, VOC) or
control signal 0-10 V from an external control to the
connection point (34).
6. Screw on cover (21) fi rmly with screws Torx 10 (20).
7. Set up power supply for ventilation system.
8.
In order to set the ventilation system to the
0-10 V signal-controlled mode, keep the
symbol pressed for 5 seconds.
When the automatic mode (0-10 V-contro-
lled mode) is activated, the A symbol on the
bottom of the control unit lights up.
6.6. ACTIVATING FIREPLACE MODE
To avoid the back-fl ow of gases into the room from the
open fl ue of gas or other fuel-burning appliances, the fi -
replace mode must be activated. When activating, S&P
recommends that you also install a pre-heater NEMBUS
210-PH (optional accessory) in order to ensure conti-
nuous operation of the device.
If there is risk of freezing, then the ventilation system is
shut down through the fi replace mode for 2 hours. When
this time has elapsed, the device switches itself on and
checks the conditions. If the conditions have not chan-
ged, the device shuts down again for 2 hours. This cycle
repeats itself until conditions for continuous operation
have been re-established.
Summary of Contents for NEMBUS 210
Page 1: ...NEMBUS 210 EN...
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