Nidec Control Techniques HVAC Drive H300 HMI Bypass, Installation And Commissioning Manual

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14 HMI Bypass Controller Installation and Commissioning Guide
2.5.5 Grounding
Never ground the HMI bypass package in common with welding machines,
motors or other high current electrical equipment. Run all ground wires in a
separate conduit.
When using several electronic bypass packages side by side, ground as shown
below.
(a) Acceptable (b) Acceptable (c) Not Acceptable
2.5.6 Customer Connection Terminals
All control circuit connections are made through the Customer Connection
terminal block. There are connections between the Customer Terminal block,
the HVAC Drive H300, and the SI-I/O module. These connections are made at
the factory and are for reference only. DO NOT change this wiring as it will
cause the HMI bypass to operate improperly or not at all.
See following page for Customer Connection Terminal diagram.
2.5.6.1 Emergency Bypass Operation
In situations requiring Emergency Bypass operation (i.e. drive removal or +24
Vdc supply failure) bypass contactor can be engaged to run the motor across
the line by moving Jumper (41-100) to (44-EB). Note the thermal overload
protection is protecting the motor.
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