4.19 SCR Cooling Manifold
The SCRs are fastened to the SCR Cooling Manifold which removes heat from the SCRs using the refrigerant that
passes through it after exiting the Inverter Cooling Manifold. Refer to Section 2.2 Motor and Power Electronics
There are different styles of SCR Cooling Manifold. The installed manifold will vary depending on the compressor
model, applied options, and revision. While not all SCR Cooling Manifolds are shown here, the removal and
installation steps from the various TTS/TTH/TGS/TGH compressors are the same.
Figure 4-168 SCR Cooling Manifold
4.19.1 SCR Cooling Manifold General Removal Steps
1. Isolate the compressor power as described in Section 1.8 Electrical Isolation on page 22.
2. Isolate the compressor and recover the refrigerant according to industry standards. Refer to Section 3.1
Refrigerant Containment on page 41.
3. Remove the mains input cables from the Terminal Block.
4. Remove the Soft Start. Refer to Section 4.14.3 Soft Start Removal and Installation on page 117.
5. For TTS300/TGS230 compressors, continue to Section 4.19.2 SCR Cooling Manifold Specific Removal
Steps - TTS300/TGS230 and for all other TTS/TGS/TTH/TGH compressors, continue to Section 4.19.3 SCR
Cooling Manifold Specific Removal Steps - TTS/TGS/TTH/TGH (Except TTS300/TGS230) on page 159.
4.19.2 SCR Cooling Manifold Specific Removal Steps - TTS300/TGS230
1. Remove the Fuses. Refer to Section 4.11.2.2 Specific 3-Phase Main Voltage Input Terminal Block
Removal - TTS300/TGS230 on page 102.
2. Remove the Capacitor Cover. Refer to Section 4.1.4.1 Capacitor Cover Removal and Installation on page
3. If the SCR Cooling Manifold is to be replaced, remove the SCR Bus Bars. Refer to Section 4.15.1 SCR DC
Bus Bar Removal and Installation on page 126.
4. Remove the SCRs. Refer to Section 4.18.3.2 SCR Removal - TTS300/TGS230 on page 149.
5. Remove the DC Bus Bars and Capacitor Assembly. Refer to Section 4.15.1 SCR DC Bus Bar Removal and
6. Remove the Inverter. Refer to Section 4.22.6 Inverter Removal and Installation on page 179.
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Summary of Contents for Turbocor TT Series
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