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13
Compressor Rotation
On 3--phase units with scroll compressors, it is important
to be certain compressor is rotating in the proper
direction. To determine whether or not compressor is
rotating in the proper direction:
1. Connect service gauges to suction and discharge
pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge
pressure should rise, as is normal on any start--up.
NOTE
: If the suction pressure does not drop and the
discharge pressure does not rise to normal levels:
1. Note that the evaporator fan is probably also
. . . . . . . .
rotating in the wrong direction.
. . . . . . . .
2. Turn off power to the unit.
. . . . . . . .
3. Reverse any two of the unit power leads.
. . . . . . . .
4. Reapply power to the compressor.
. . . . . . . .
The suction and discharge pressure levels should now
move to their normal start--up levels.
NOTE
: When the compressor is rotating in the wrong
direction, the unit makes an elevated level of noise and
does not provide cooling.
Filter Drier
Replace whenever refrigerant system is exposed to
atmosphere. Only use factory specified liquid--line filter
driers with working pressures no less than 650 psig. Do
not install a suction--line filter drier in liquid line. A
liquid--line filter drier designed for use with Puron
R
refrigerant is required on every unit.
Condenser--Fan Location
See Fig. 13.
1. Shut off unit power supply. Install lockout tag.
2. Remove condenser--fan assembly (grille, motor, and
fan).
3. Loosen fan hub setscrews.
4. Adjust fan height as shown in Fig. 13.
5. Tighten setscrews to 84 in--lbs (9.5 Nm).
6. Replace condenser--fan assembly.
C08448
Fig. 13 -- Condenser Fan Adjustment
Troubleshooting Cooling System
Refer to Table 1 for additional troubleshooting topics.
Содержание 50LC 07
Страница 9: ...9 COOLING CHARGING CHARTS C150169 Fig 9 Cooling Charging Charts 07 ...
Страница 10: ...10 COOLING CHARGING CHARTS C150172 Fig 10 Cooling Charging Charts 08 ...
Страница 11: ...11 COOLING CHARGING CHARTS C150170 Fig 11 Cooling Charging Charts 09 ...
Страница 12: ...12 COOLING CHARGING CHARTS C150171 Fig 12 Cooling Charging Charts 12 ...
Страница 27: ...27 C150181 Fig 34 50LC 07 Control Wiring Diagram ...
Страница 28: ...28 C150225 Fig 35 50LC 07 RTU Open Control Wiring Diagram ...
Страница 29: ...29 C14095 Fig 36 50LC 07 Power Wiring Diagram 208 230V 460V and 575V Units ...
Страница 30: ...30 C14013 Fig 37 50LC 08 12 Control Wiring Diagram ...
Страница 31: ...31 C14104 Fig 38 50LC 08 12 RTU Open Control Wiring Diagram ...
Страница 32: ...32 C14105 Fig 39 50LC 08 12 Power Wiring Diagram 208 230V Units ...
Страница 33: ...33 C150216 Fig 40 50LC 08 12 Power Wiring Diagram 460V 575V Units ...
Страница 57: ...57 C13683 Fig 62 Typical EconoMi er X Wiring Diagram ...