AIR COOLED SCROLL CHILLER INSTALLATION
25
Reliable earthing must be ensured.
3）Control Connection Wire
Control leading wire at site should be 1mm
2
at least.
The signal connected with water flow switch is 12V D.C light-current signal, so never
wire it together with the leading wire at 50V or above in parallel. If unavoidable, the
distance between heavy current and light current signals must be kept 150mm or above.
Chilled water pump is equipped with the electric box of unit. Control signal （220V
AC；capacity 5A）of E-heater can drive chilled water pump and AC contactor of E-heater.
Never make the motor of chilled water pump and E-heater directly driven by the signal.
Keep some allowance of control wire in the unit. Never tie the excess wire into the
electric box of the unit.
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