Purpose:
The purpose of this document is to provide instructions on removing and installing in-vacuum cooling lines that are used inside of the MEC test chamber.
Procedure
Disconnecting Cooling Lines:
Starting conditions :
- Test chamber is at atmospheric pressure
- All 3 x chillers that are below the chamber are powered on and plumbed through the vacuum chamber feedthroughs to devices installed inside the test chamber.
- Check with Instrument Scientists or Area Manager to ensure that all detectors that are connected to cooling lines are powered off.
- Power off each chiller by pressing the power switch on the back or side of the chiller.
- Find where the external cooling lines connect to the chamber feedthroughs. Disconnect both the supply and the return lines from the chamber and allow the fluid from the in-vacuum lines to drain into a bucket.
- Once the vacuum chamber cooling lines have drained completely, you can proceed to disconnecting the lines inside the chamber.
- Use 5/8" and 3/4" wrenches, loosen the VCR fittings on the inside of the vacuum chamber, closest to the feedthroughs. Disconnect one at a time, catching all residual water in a container or a rag.
- Use 5/8" and 3/4" wrenches to disconnect the VCR fittings on the heat load (device being cooled).
- Store all VCR fittings and hoses/tubes in the "In-Vacuum Cooling" drawers.
- Plug, cap or loop all 3x feedthrough connections inside the chamber with VCR fittings and hoses.
- Reconnect the external cooling lines.
Connecting Cooling Lines:
Starting Conditions:
- Chillers are all off
- External cooling lines are all connected to the external ports of the feedthroughs
- Internal ports on the feedthroughs are capped/plugged/looped.
...