Yaskawa E7L Drive Bypass - Manual (Page 32)

Physical Installation 1 - 20
Controlling the Ambient Temperature
To enhance the reliability of operation, the Bypass unit should be installed in an environment free from extreme temperature
variations. Do not store this Technical Manual or any other documents on the top surface of the Bypass unit, they may cover
the heat sink cooling air discharge opening and cause the unit to overheat.
If the Bypass unit is installed in an enclosure (such as an electrical control box in an air handling unit), use a cooling fan or air
conditioner to maintain the Bypass unit internal air temperature below 113
°F (45°C).
Protecting the Bypass Unit from Foreign Matter
During Bypass unit installation and project construction, it is possible to have foreign matter, such as metal shavings or wire
clippings, fall inside the Bypass unit. To prevent foreign matter from falling into the Bypass unit, place a temporary cover over
the unit.
Always remove the temporary cover from the Bypass unit before start-up. Otherwise, ventilation will be reduced, causing the
Bypass unit to overheat.
Installation Orientation and Enclosure Considerations
Install the Bypass unit vertically so as not to reduce the cooling efficiency. When installing the Bypass unit, always provide the
recommended installation clearances to allow normal heat dissipation.
When preparing to mount the unit, lift it by the base (or lifting rings when provided), never by the enclosure door. For effective
cooling and proper maintenance, the wall mounted units must be installed on a flat non-flammable vertical surface using four
mounting screws.
For all units, the Disconnect handle should be in the OFF position to open the enclosure door. The wall mount units have two
full turn fasteners, CCW to open, that require a flat blade screwdriver to open the enclosure door.