Clearances (front) Clearances (side) FR-A820-03160(55K) or lower, FR-A840-01800(55K) or lower FR-A820-03800(75K) or higher, FR-A840-02160(75K) or higher 10 cm or more 20 cm or more 5 cm or more *1,*2 5 cm or more *1,*2 10 cm or more 10 cm or more 5 cm or more *1,*3 Inverter Vertical Allow clearance. 10 cm or more 20 cm or more *1 For the FR-A820-00250(3.7K) or lower and FR-A840-00126(3.7K) or lower, allow 1 cm or more clearance. *2 When using the FR-A820-01250(22K) or lower and FR-A840-00620(22K) or lower at the surrounding air temperature of 40°C or less (30°C or less for the SLD rated inverter), inverters can be mounted side by side without leaving any clearance.
*3 There needs to be a space of at least 30 cm in front of the inverter to replace the cooling fan of the FR-A840-04320(160K) or higher. Refer to page 836 for fan replacement. Installation orientation of the inverter Install the inverter on a wall as specified. Do not mount it horizontally or in any other way. Above the inverter Heat is blown up from inside the inverter by the small fan built in the unit. Any equipment placed above the inverter should be heat resistant. Arrangement of multiple inverters When multiple inverters are placed in the same enclosure, generally arrange them horizontally as shown in the figure (a).
When it is inevitable to arrange them vertically to minimize space, take such measures as to provide guides between the inverters since heat generated in the inverters in bottom row can increase the temperatures in the inverters in top row, causing inverter failures. When installing multiple inverters, fully take measures to prevent the surrounding air temperature of the inverter from being higher than the permissible value by providing ventilation or increasing the enclosure size. Inverter Inverter Inverter Inverter Guide Guide Guide Inverter Inverter (a) Horizontal arrangement (b) Vertical arrangement Enclosure Enclosure Arrangement of multiple inverters 44 2.
INSTALLATION AND WIRING 2.3 Installation of the inverter and enclosure design