Zehnder EASY 5.0
27
14.4.4. Manual control of outputs
The controller has a manual control function for the analogue AO and digital DO outputs, which allows individual,
continuous control of actuators and customer devices independently of the control and safety loops. This makes it
possible to check, in particular:
■
The status and correct operation of the controller's analogue (0-10V) or digital outputs
■
The condition and functioning of the actuators (e.g. fan or motorised register)
■
The correct operation of any external device wired by the installer or technician (e.g. alarm reporting)
■
The correct operation of a running control device (e.g. air pressure switch).
Another advantage of the manual output control function is the ability to check the operation of certain sensors. In fact,
by activating the fan and thus allowing air volume to circulate, certain inputs are affected directly, such as the change of
state of the fan feedback pressure switch, which allows us to check the correct operation of this device.
The manual control function can also be used during the set-up phase because it allows the operation of certain
actuators to be stabilised at specific points, thus making it possible to take readings or measurements (absorbed
current, pressure, temperature, etc.) or to check the operation of external devices (alarm reporting, forcing the opening
of registers during cooling, etc.).
The manual control of the outputs is a function that can only be accessed when the unit is OFF in order to avoid any
improper intervention that could endanger the operator as well as the machine. The machine cannot be restarted if any
outputs are in the manual status. All outputs must be in automatic mode in order to restart the machine.
Notes:
■
Manual control of the rotary heat exchanger: it is necessary to activate the DO rotary heat exchanger to give the run
command (power supply) to the exchanger
■
Manual control of the fans: in addition to the targeted control of the fans, it is possible to control the correct operation
of the air volume control pressure switches (ECO/DIVA), air pressure transducers (LOBBY) and air volume meters
(MAC2/QUATTRO).
Access path to the function (Access level: Expert)
Step 1
→
Step 2
→
Step 3
From
screen
Area to
click
Analogue outputs
Digital outputs
Main menu
Manual control of outputs
Analogue outputs
Digital outputs
Z-MASTER-V1122-CSY-INM-Zehnder Easy5.0
