11
SYSTEM OVERVIEW: MZ-HOME CONTROLLER
11
MZ-Home | Operating instructions
B: Integration of a safety device
In addition to humidity control, it is possible to integrate a safety device (e.g. a 4 Pa pressure
sensor) when the ventilation system is operated simultaneously with fireplaces.
Sensor
Input
Limit value exceeded
Limit value not reached
Pressure
sensor (4 Pa)
Fireplace
switching
contact
(normally
closed or
normally open
contact)
Switch all ventilation units
connected
to the controller
to
OFF mode.
Switch all ventilation devices
connected
to the controller
to
the originally set mode.
WARNING:
Fo
r joint operation with fireplaces, safety measures must be taken to prevent a
negative pressure from developing in the building.
• The responsible chimney sweep and/or building planner decides which measures need to be
carried out.
If an external pressure sensor (4 Pa pressure sensor) is integrated, the air pressure in the interior
is continuously monitored. As soon as this exceeds the safety-relevant limit, the sensor transmits
this to the controller. This then switches all connected ventilation devices off. The function remains
active until the air pressure drops below the safety-relevant limit again. Then all ventilation
devices connected to the controller switch to the originally set operating mode and output level.
Both a normally closed contact and a normally open contact can be used as a pressure sensor.
When integrating a safety device into the ventilation system, the input
Fireplace switch
must be
selected for the respective zone in the main
settings
menu. In addition, the switch function (NO
contact, NC contact) must be defined (
i
