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

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10 HMI Bypass Controller Installation and Commissioning Guide
2.5 Wiring and Precautions
2.5.1 General
1. DO NOT connect or disconnect wiring or perform signal checks while the
power supply is turned ON.
2. Connect the power supply wiring to the HMI bypass input terminals L1, L2
and L3 on the main circuit disconnect device.
3. Connect the motor wiring to the bypass output terminals T1, T2 and T3 at
the Class 20 Motor O/L or the output reactor if installed.
4. Never touch the output circuit directly or place the output line in contact
with the package enclosure.
5. DO NOT connect power factor correction capacitors on the output circuit.
6. Power supply wiring and motor wiring must be in separate conduits with
separate ground conductors. (DO NOT use conduits as ground).
7. Control wiring must be in conduit separate from both power supply and
motor wiring.
8. Tighten the screws on the main circuit disconnect (if provided) and control
circuit terminals.
9. Observe national and local codes when wiring electrical devices.
Failure to observe these precautions may result in equipment damage or
improper operation and may not be covered under warranty.
2.5.2 Input Wiring
The HMI bypass package may be supplied with several different input device
options. These input options include protective devices as well as non–
protective devices. It is the responsibility of the installing parties to ensure
that requirements for branch circuit protection of the appropriate size and
location are observed. All incoming power is connected to terminals L1, L2,
and L3. The following input options are available.
»
Fused disconnect
»
Circuit breaker
»
Input line reactor
»
Input RFI filter