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6. Continue to Section 4.21.5 DC Capacitor Bus Bar Assembly General Installation Steps.
4.21.4.3 DC Capacitor Bus Bar Assembly Installation - TTS300/TGS230
1. Position the DC Bus Bar and Capacitor Assembly into place. Refer to Figure 4-182 Capacitor Assembly
Removal - TTS300/TGS230 on page 170.
2. Loosely install the Snubber Capacitors to the Inverter noting the leg orientation. Refer to Figure 4-180
Snubber Capacitor Removal - TTS300/TGS230 on page 169.
3. Loosely install the DC Bus Bars to the SCRs. Refer to Figure 4-179 DC Bus Bar and Soft Start Harness
Removal - TTS300/TGS230 on page 168. for this and the following step.
4. Loosely install DC Bus Bars to the DC Bus Assembly.
5. Starting from the side closest to the capacitors, torque the M6x16 Snubber Capacitor fasteners to 7 Nm
(62 in.lb.).
6. Connect the DC+ and DC- of the Soft Start harness to the DC bus assembly noting the orientation and
torque to 10 Nm (7 ft.lb.). Refer to Figure 4-178 Soft Start Cable Harness to DC Bus on page 167.
7. Torque the six (6) SCR fasteners, to secure the two (2) SCR DC Bus Bars, to 5 Nm (44 in.lb.).
8. Torque the two (2) Capacitor DC Bus Bar to SCR Bus Bar fasteners to 10 Nm (7 ft.lb.).
9. Place the capacitor membrane, foam-side up, underneath the main compressor housing and then
Install the nylon nuts to the base of the DC Capacitor Bus Bar Assembly, and torque to 7 Nm (62 in.lb.).
Refer to Figure 4-181 Capacitor Nut Removal - TTS300/TGS230 on page 169.
10. Connect the SCR Gate cable harness to the SCRs noting its orientation. Refer to Figure 4-140 SCR
Connections - TTS300/TGS230 on page 141.
11. Continue to Section 4.21.5 DC Capacitor Bus Bar Assembly General Installation Steps.
4.21.4.4 DC Capacitor Bus Bar Assembly Installation - TTS/TGS/TTH/TGH (Except TTS300/TGS230)
1. Position the DC Bus Bar and Capacitor Assembly into place.
2. Loosely Install the six (6) DC bus M8x20 fasteners to the SCRs.
3. Loosely install the Snubber Capacitors to the Inverter noting the leg orientation.
4. Starting from the side closest to the capacitors, torque the Snubber Capacitors to 7 Nm (62 in.lb.).
5. Torque the six (6) M6x16 SCR Bus Bar fasteners to 5 Nm (44 in.lb.).
6. Place the capacitor membrane foam-side up, underneath the main compressor housing and install the
nylon nuts to the base of the DC Capacitor Bus Bar Assembly, torque to 7 Nm (62 in.lb.).
7. Install the SCR Gate Cables onto the SCRs. Refer to Section 4.16.2.2 Soft Start SCR Gate Cable
8. Install the Mains AC bus bar assembly.
9. Continue to Section 4.21.5 DC Capacitor Bus Bar Assembly General Installation Steps.
4.21.5 DC Capacitor Bus Bar Assembly General Installation Steps
1. Install the Soft Start. Refer to Section 4.14.6 Soft Start Installation (Closed-Top) on page 121.
2. Install the top covers. Refer to Section 4.1 Compressor Covers on page 52.
3. Return the compressor to normal operation.
4.21.6 DC Capacitor Bus Bar Assembly Torque Specifications
Table 4-33 DC Capacitor Bus Bar Assembly Torque Specifications
Description
Nm
Ft.Lb.
In.Lb.
Soft Start DC+ & DC- to DC Bus Bolt/nut (TTS300/TGS230 only)
10
7
89
DC Capacitor Bus Bar to SCR Bus Bar Bolt (TTS300/TGS230 only)
10
7
89
DC Bus Bars to SCR fastener, M6x16 (TTS300/TGS230 only)
5
-
44
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