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4. Lower the Cover Plate onto the Main housing.
5. Using the 10 M8x25 fasteners, install the Cover Plate. Finger-tighten and then, according to
"Figure 4-251 Cover Plate Torque Sequence", tighten in a crisscross pattern in two (2) stages.
• Stage 1: Tighten to 10 Nm (7 ft.lb.)
• Stage 2: Tighten to a final torque of 18 Nm (13 ft.lb.)
Figure 4-251 Cover Plate Torque Sequence
6. Leak test and evacuate in accordance with standard industry practices.
7. Connect the two (2) connectors to the thermistor sensor feedthrough.
8. Place the motor bus bars in their correct locations; they are designed to align to individual bolt
patterns and should not be forced.
9. Loosely install the three (3) M8x70 fasteners that secure the motor bus bars to the inverter
output through the Copper Tubes. Continue to Step 10 if the compressor contains PPS High-
Power Feedthroughs. Continue to Step 11 if the compressor contains Stainless-Steel High-
Power Feedthroughs.
10. Install the three (3) M10x16 fasteners and lockwashers that secure the motor bus bars to the
PPS High-Power Feedthroughs and torque to 14 Nm (10 ft.lb.). Be careful not to over tighten
the bolts to the power feedthroughs. Continue to Step 12.
11. Install the three (3) M10 nuts and lockwashers that secure the motor bus bars to the Stainless-
Steel High-Power Feedthroughs and torque to 15.5 Nm (11.5 ft.lb.). Be careful not to over
tighten the bolts to the power feedthroughs. Continue to Step 12.
12. Torque the three (3) M8x70 fasteners that secure the motor bus bars to the inverter output to
14 Nm (10 ft.lb.).
13. Install the Soft Start. Refer to "4.15.3 Soft Start Removal and Installation" on page 112.
14. Install the top covers. Refer to "4.2 Compressor Covers" on page 56.
15. Return the compressor to normal operation.
4.24.5.7 High Power Feedthrough Removal
1. Isolate compressor power as described in Section "1.8 Electrical Isolation" on page 19.
2. Recover the refrigerant from the compressor according to industry standards. Refer to "3.1
Refrigerant Containment" on page 41.
3. Remove the Soft Start. Refer to "4.15.3 Soft Start Removal and Installation" on page 112.
4. Remove the Motor Bus Bars. "4.24.5 Motor Assembly Removal and Installation" on page 193.
5. Remove the Cover Plate. Refer to "4.24.5.5 Motor Cover Plate Removal" on page 195.
6. For the PPS feedthrough, continue to Step 7. For the stainless-steel style, continue to Step 8.
6
8
10
4
3
9
7
5
1
2
• • • CAUTION • • •
While torqueing the High-Power Feedthrough Nuts, it is important to hold the inner nut with a wrench. Failure to do so could place an
excessive load on the feedthrough causing internal damage. Also, the feedthrough itself could move which could allow it to loosen or
be over torqued.
Summary of Contents for Turbocor TTS Series
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