ELOG Solenoid

Solenoid logbook

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Entry time:	Wed Jan 15 13:07:00 2025
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> At about 09:30 this morning I noticed the sound coming from the compressor > building seemed louder than usual. After entering the building I noted that > the compressor was unloaded to about 50% and the compressor suction was > running at about 15 psig. Down at the SULZER panel the solenoid vacuum > system was tripped off, the flow was still in series mode but no LHe level, > solenoid temps at over 40 K. Contacted Doug. Cannot figure out why the > compressor was unloaded to 50 %. Solenoid had not tripped on bad vacuum > because jumper was still on PIC901. Doug mentioned there was a power bump > yesterday at about 15:00. May be when the vacuum system tripped but does > not explain the compressor unloading. > > Doug restarted vacuum system. I stopped flow to solenoid. Stabilized > pressures. We checked the compressor to try to see what would cause the > Unloaded state. Could not see any oil leaks. > > Back at Sulzer panel loaded compressor to 100 %. Stabilize pressures. STart > cooling flow to solenoid, // warm return. Adjusting turbine speeds and > shield heat as required. Switched to // cold return flow after solenoid > temps down to TIC 121 temp of about 20 K. Encoding: HTML ELCode plain Suppress Email notification

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