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Operational Settings: QT_Operational_Settings.pdf

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Configurations for Cooldown and Production
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Procedures

1. Shut Down and Restart Procedures
2. Helium Liquefier (QT) System Summary
3. How to fill LN2 to the Purifier and Magnet LN2 spaces
4. How to fix the QT-HMI if its screen got frozen
5. Fixing dewar level indicator
6. How to restart the QT PLC
7. How to fix if the outlet flows of Liquefiers are showing strange values
8. HR3 operations
9. Filling LN2 to the purifier using a portable Dewar
10. QT System Starting Procedure
11. Liquefier Cleaning when Dewar contains LHe
12. Cleaning QT purifier Helium-space (pumping-purging the purifier).              Cleaning QT purifier Helium-space (OLD)
13. Cleaning QT purifier LN2 space
14. Fixing dewar level indicator (related to (9))
15. Dewar Cleaning Procedure (using the transfer line)
16. Cold-helium Circulation Procedure (Cooldown Transferline)
17. Cleaning gHe outside tank using the purifier
18. Resolving Liquefier Blocking Alarm when Liquefier is on Liquefy Mode
19. Resolving Liquefier Blocking Alarm when Liquefier is on Idle Mode
20. Purifier LN2 Fill Procedure-updated-labels.pdf ( Please use this updated one, or the original one on docdb 10337 by Jordan Bohn)

• • 03 Jun 2023 Now, EV-100-N is not functioning well. So, Jordan recommends using the HCV-13 while playing with EV-100-N. Purifier LN2 Fill Procedure.pdf 

1. LN2 Shield Fill Procedure-updated_labels.pdf( Please use this updated one, or the original one on docdb 10337 by Jordan Bohn)
2. LHe fill procedure using a QT dewar
3. LHe fill procedure using a commercial dewar
   Important Cooldown > Liquefying modes information
4. QT Dewar Cooldown Mode from Room Temperature
5. Bringing the Dewar Pressure down in Liquefy/Idle mode

Useful information

1. The volume of an outside gHe tank: 1600 cubic feet (V = 45306.95 L)
2.  The pressure increase in the gHe tank per tube (in the tube trailer) is 10psi (i.e. 10 psi difference per tube)
3. 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
4. QT recommendation to keep system minimally pressurized: ~20 psi
5. Running from 40 psi down to 20 psi would produce about 80 liquid litters and we should be able to do that in about 10 hours (assuming both LQ A and B are running).
6. Putting a 2200 psi gas bottle into the system will produce 8 liquid liters per bottle.
7. HR3.docx (It's a copyright of QT-technology. Please do not make it public. )

The following page contains information on the production and transfer efficiency studies

LHe Production Rate Optimization
LHe Transfer Efficiency

To check LCW parameters: https://e906-gat1.fnal.gov/data-summary/e1039/slow-cont-acnet.php 
(click on NM4LCW or select F:NM4LCWFLOW F:NM4LCWP1 F:NM4LCWP2 F:NM4LCWP3 F:NM4LCWT1 F:NM4LCWT2 )

QT LCW requires are 7.8kW of cooling per coldhead compressor, will less than 77F on water inlet and at least 6L/min of flow. 

To check HMI parameters: https://e906-gat1.fnal.gov/data-summary/e1039/target-QT-HMI.php  (select:TI502 TI504 TI506 TI508 TI510 for both Liquefier A and B)

Manuals

1. Helium Compressor Manual.pdf
2. Cold_Head_Hot_Swap_Procedure.pdf
3. prosense_qps.pdf

System Logs

Items-Purchased

1. https://www.automationdirect.com/adc/shopping/catalog/process_control_-a-_measurement/pressure_sensors/pressure_transmitters/spt25-20-v30d
2. https://www.automationdirect.com/adc/shopping/catalog/cables/pneumatic_solenoid_valve_cables_-a-_connectors_(square_din_style)/8mm_(din_43650c)/sc8-5t
3. https://aircompressorservices.com/products/kaeser-oil-filter-replacement-6-3462-1
4. https://aircompressorservices.com/products/kaeser-5-gallon-partial-synthetic-oil-replacement-m460-005

Maintenance Procedures

1.  Cleaning QT purifier Helium-space from the top of the purifier Dewar (This needs to be done periodically because the purifier will be blocked by the contaminants from regular air)
   a) Change the operation to "Manual" + "Run" mode, and close the SV01 and SV03 valves: also close the BV02 hand valve and REGX regulator on the liquefier manifold
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   b) Make sure to boil off and vent all the LN2 before the pumping-purging procedure. Use the heater if necessary (tap on the small bar located bottom of the purifier sign: orange color indicates that heater is ON).
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   c) Connect the pump to the outlet from V10a (currently we use the Edwards pump which is connected to the Helium recovery manifold pipe) with a pressure gauge, hand valve, and a Helium gas bottle (to backfill).
        Keep the V9a closed during pumping and purging.
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     Cleaning QT purifier Helium-space including the HR3 compressor lines up to the manifold
   

   1) Opened V9a and V21a
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   2) kept V30 hand valve closed
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   3) Kept BV02 & RegX hand valves (going to/from liq A, B) closed
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   4) Opened SV01 and SV03 (Note: if the valves are not opening via PLC, then check whether the system is in Manual + Run mode, if not select that mode to open SV01 and SV03)
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   5) Pumped down using the setup that we just installed on the Vent.
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   6) Opening hand valve V30 slowly increases the pump sound (takes a couple of seconds to respond due to the long path to reach the pump)
        See the above picture in setep 2