Installation
36
CAUTION
• This product have reversed phase protection detector that only works when the
power is turned on. If there exists black out or the power goes on and off which
the product is operating, attach a reversed phase protection circuit locally. run-
ning the product in reversed phase may break the compressor and other parts.
• Use the 2-core shield cables for communication lines. Never use them together
with power lines.
• The conductive shielding layer of cable should be grounded to the metal part of
both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not
only will deteriorate power factor improvement effect, but also may cause capac-
itor abnormal heating. Therefore, never install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater,
the unit’s lifespan will be reduced.
• Introducing with a missing N-phase or with a mistaken N-phase will break the
equipment.
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the
power cable may cause abnormal heat.)
• When connecting cable which is the same thickness, do as shown in the figure below.
• For wiring, use the designated power cable and connect firmly, then secure to prevent out-
side pressure being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small
head will strip the head and make proper tighterning impossible.
• Over-tightening the terminal screws may break them.
u
Precautions when laying power cable
Round pressure terminal
Power cable
Use round pressure terminals for connections to the power terminal block.
Summary of Contents for AHNW166T0
Page 73: ......
