4
Electronic Bypass Controller Installation and Commissioning Guide
Safety and Precautions
1. Read this manual in its entirety before installing or operating the electronic bypass
package. This manual applies to electronic bypass packages with the Emerson
Control Techniques HVAC Drive H300, Unidrive M200 or Unidrive M400 variable
frequency drives, and control board part number 1067144-01 and is not intended
to be used with any other products.
2. Do not connect or disconnect wiring, or perform signal checks while the power
supply is turned ON.
3. The internal capacitor of the installed drive may be charged even after the power
supply has been turned OFF. To prevent electrical shock, disconnect all power
before servicing the electronic bypass. Wait at least 10 minutes after the power
supply has been disconnected and all LEDs have been extinguished.
4. Do not perform a voltage withstand test on the electronic bypass or the installed
drive. This electronic equipment uses semiconductors and is vulnerable to high
voltage. Severe damage to the equipment may occur.
5. Do not remove the digital operator from the inverter unless the power supply has
been turned OFF. Never touch the printed control board while the power supply is
turned ON.
6. The electronic bypass is suitable for use on a circuit capable of delivering not more
than 100,000 RMS symmetrical Amperes, 480 Volts maximum (460 Volt Class
units), 240 volts maximum (230 Volt class units).
7. Static sensitive printed circuit boards are installed in the electronic bypass
package. Damage may occur due to Electrostatic Discharge (ESD). DO NOT handle
any components without following proper ESD precautions.
Failure to observe these and other precautions highlighted in this manual will expose
the user to high voltages, resulting in equipment damage, serious injury or death.
The information contained within this document is proprietary to Emerson Control
Techniques and may not be copied, reproduced or transmitted to other parties
without the expressed written consent of Emerson Control Techniques.
No patent liability is assumed with respect to the use of information contained
herein. Moreover, because Emerson Control Techniques is constantly improving its
high quality products, the information contained in the manual is subject to change
without notice. Every precaution has been taken in the preparation of the manual.
Nevertheless, the manufacturer assumes no responsibility for errors or omissions.
Neither is liability assumed for damages resulting from the use of the information
contained in this publication.
WARNING
