NOTE: Before proceeding with disassembly, make sure the machine is at atmospheric pressure.
→NOTE: The screw compressor uses all metric dimensions and metric fasteners. The heat exchangers and oil separator use American standard dimensions and English fasteners. Metric wrenches are required to remove the compressor.
To Separate Cooler and Condenser (Frame 1 and 2 Machines)
1.Turn vessel separation feet to the lowered position (Fig. 8).
2.Disconnect and/or cut the following lines:
a.cooler liquid feed (Fig. 8).
b.condenser refrigerant vapor to oil reclaim ejector (Fig. 9).
c.motor cooling supply from condenser (Fig. 9).
d.optional hot gas bypass and associated solenoid valve wiring (not shown).
3.Separate compressor from oil supply system by discon- necting the following:
a.discharge ¯ange from compressor and remove check valve (Fig. 8).
b.oil supply line to compressor and associated solenoid valve wiring (Fig. 8).
c.oil scavenging/sump vent to compressor (Fig. 8 and 9).
4.Cover all openings.
5.Be sure all wiring is properly marked. Detach all trans- ducers, switches, and sensor wires. Remove all wire ties required to remove wires from the cooler to the con- denser. Do not cut the wires.
6.Disconnect the rabbet ®t connectors on the tube sheets (Fig. 9).
7.Rig vessels apart.
To Separate Compressor from Cooler (Frame 1 and 2 Machines)
→
The compressor is heavy. To avoid bodily injury, lift the compressor only by using cables or slings. Do not lift the compressor using threaded eyebolts. The metric threaded eyebolts are provided only for lifting indi- vidual compressor castings.
1.Unbolt the suction ¯ange (Fig. 8).
2.Disconnect the following lines:
a.oil reclaim to compressor (Fig. 9).
b.motor cooling to motor (Fig. 9).
c.motor cooling drain (Fig. 9).
d.optional economizer gas line to compressor rotors (Fig. 9).
3.Separate compressor from oil supply system by discon- necting the following:
a.discharge ¯ange from compressor and remove check valve (Fig. 8).
b.oil supply line to compressor and associated solenoid valve wiring (Fig. 8 and 9).
c.oil scavenging/sump vent to compressor (Fig. 8 and 9).
4.Cover all openings.
5.Be sure the following electrical connections are disconnected:
a.motor power cables from optional
b.motor winding temperature sensor (Fig. 9).
c.slide valve increase and decrease capacity control so- lenoid valves (Fig. 9).
d.optional variable VI solenoid valves (Fig. 9).
e.discharge (condenser) pressure transducer (Fig. 8).
6.Unbolt motor support foot (Fig. 8).
7.Rig compressor.
To Separate Oil Separator from Condenser (Frame 1 and 2 Machines)
1.Separate the compressor and oil separator by disconnect- ing the following:
a.discharge ¯ange from compressor and remove check valve (Fig. 8).
b.oil feed from separator to sump (Fig.9).
c.oil scavenging/sump vent to compressor (Fig. 8 and 9).
d.oil sump relief to separator (Fig. 8).
2.Unbolt the discharge adaptor ¯ange from the condenser (Fig. 9).
3.Cover all openings.
4.Be sure the following electrical connections are disconnected:
a.high discharge pressure cutout switch (Fig. 8).
5.Unbolt the four securing bolts from the bottom of the oil separator (Fig. 8 and 9).
6.Rig oil separator.
NOTE: Before proceeding with disassembly, make sure the machine is at atmospheric pressure.
To Separate Cooler and Condenser (Frame 4 Machines)
→
The compressor is heavy. To avoid bodily injury, lift the compressor only by using cables or slings. Do not lift the compressor using threaded eyebolts. The metric threaded eyebolts are provided only for lifting indi- vidual compressor castings.
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