Yaskawa E7L Drive Bypass - Manual (Page 31)

Physical Installation 1 - 19
Checking and Controlling Installation Site
Install the Bypass unit as described below and maintain the specified operating conditions.
Installation Site
Location of the Bypass unit is important to achieving proper performance and design operating life. Install the Bypass unit as
close as possible to the motor. The NEMA type 1 & 12 enclosed units should be installed in an area where it will be protected
from: Direct sunlight, rain or moisture, corrosive gasses or liquids, vibration and dust or metallic particles. The ambient air
available for cooling the unit should be 104° F (40° C) or less.
Wall mount units require a minimum 6 inch clearance above and below, to achieve adequate heat sink cooling.
No side clearance is required for cooling because the cooling air flow is in and out of the enclosure door at the front surface of
the unit (do not block the air flow louvers). Clearance for the opening swing of the enclosure door should be considered when
placing these units. The door is hinged on the left and must open through at least a 90 degree swing with a 120 to 180 degree
swing being preferable (minimum clearance is 1.5”).
Install the Bypass unit under the following conditions in UL pollution degree 1 & 2 environments. This excludes wet locations
where surfaces may become conductive due to moisture and contaminant loading.
Observe the following precautions when mounting the Bypass unit.
• Install the Bypass unit in a clean location that is free from oil mist and dust.
• Install the Bypass unit in an environment where metal shavings, oil, water, or other foreign matter will not get into the
Bypass enclosure.
• Install the Bypass unit in a location free from radioactive materials.
• Install the Bypass unit in a location free from harmful gasses and liquids.
• Install the Bypass unit in a location without excessive vibration.
• Install the Bypass unit in a location free from chlorides.
• Install the Bypass unit in a location not in direct sunlight.
• Install the Bypass unit on a non-combustible surface.
Table 1.7 Installation Site
Type Ambient Operating Temperature Humidity Plenum Rated
NEMA Type 1 & 12 14 to 104 °F (-10 - to - + 40 °C) 95% - RH - or - less - (no - condensation) Yes