4) With the disconnector in position 0, connect the appropriate mains supply for each case to the
supply terminals X1:
3-phase line connection Single-phase line connection
Proper wiring prevents electrical noise.
Electrical noise can produce undesirable effects on electronic control circuits, which affects
controllability. Electrical noise is generated by electrical equipment, such as: inductive loads, electric
motors, solenoid coils, welding machinery, or fluorescent light circuits. The electrical noise or
interference generated from these sources (and the effect on controllers) is difficult to define, but the
most common symptoms are erratic control or intermittent operational problems.
Important.
For maximum EMC effectiveness, wire all humidity, high limit, and airflow controls using multicolored
shielded/screened plenum-rated cable with a drain wire for the shield/screen. Connect the drain wire
to the shield/screen ground terminal with wire less than 2" (50 mm) in length.
Do not ground shield at the device end.
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