Trane Precedent TSC060, Установка, эксплуатация и обслуживание

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T_C-IOM-2A
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Installation
Electrical Phasing
(Three Phase Motors)
The compressor motor(s) and the supply fan motor are inter-
nally connected for the proper rotation when the incoming
power supply is phased as A, B, C.
Proper electrical supply phasing can be quickly determined and
corrected before starting the unit by using an instrument such as
an Associated Research Model 45 Phase Sequence Indicator
and following the steps below:
[ ] Turn the field supplied disconnect switch that provides power
to the main power terminal block or to the “Line” side of the
optional factory mounted disconnect switch to the “Off” posi-
tion.
[ ] Connect the phase sequence indicator leads to the terminal
block or to the “Line” side of the optional factory mounted
disconnect switch as follows;
Black (phase A) to L1
Red (phase B) to L2
Yellow (phase C) to L3
[ ] Close the field supplied main power disconnect switch or cir-
cuit protector switch that provides the supply power to the
unit.
HAZARDOUS VOLTAGE!
HIGH VOLTAGE IS PRESENT AT THE TERMINAL BLOCK
OR UNIT MOUNTED DISCONNECT SWITCH.
To prevent injury or death from electrocution, it is the responsibil-
ity of the technician to recognize this hazard and use extreme
care when performing service procedures with the electrical
power energized.
[ ] Observe the ABC and CBA phase indicator lights on the
face of the sequencer. The ABC indicator light will glow if the
phase is ABC. If the CBA indicator light glows, open the
disconnect switch or circuit protection switch and reverse any
two power wires.
[ ] Restore the main electrical power and recheck the phasing. If
the phasing is correct, open the disconnect switch or circuit
protection switch and remove the phase sequence indicator.