IAI America ACON-CY - Manual (Page 35)

23
3. Installation and W
iring
[2] DC solenoid valves, magnet switches and relays
Method: Mount diodes in parallel with the coil or use types with built-in diodes.
In a DC circuit, connecting a diode in reverse polarity will damage the
diode, internal parts of the controller and/or DC power supply, so exercise
due caution.
3.4 Heat Radiation and Installation
Design the control panel size, controller layout and cooling method so that the temperatures around the
controller will always be kept to 40
qC or below.
Mount the controller vertically on the wall, as shown below. Since cooling is provided by means of natural
convection, follow this orientation and provide a minimum clearance of 50 mm above and below the controller
to allow sufficient airflows to circulate.
If you are installing multiple controllers side by side, provide a fan on top of the controllers to agitate the airflows
as an effective way to keep the surrounding air temperatures constant.
Provide a minimum clearance of 80 mm between the front face of the controller and the wall (cover).
Regardless of whether you are installing one or more controllers, provide sufficient clearances around each
controller to permit easy access for installation and removal of the controller.
Fan
At least 50 mm
At least 50 mm
At least 80 mm
Airflow