Quick start

Before you start the cooling system check that the power supplies of the base-plate heaters are switched on. The 8 power supplies are located at the bottom of the C3B02 rack. Note that the voltage/current reading can be zero when the system cooling has been off for long time. Switch the power supplies on when this is not the case (small on/off button on each supply).

The system can be started from the user interface (see section 5 and figure 1 of the manual).

  • Push the button “start TR C-side” to start the cooling of the C-side. (for the powering shifts only this action is required)
  • Push the button “start TL A-side” to start the cooling of the A-side.
  • Follow the status in the status field the following sequence (with an indicative time on how long the status lasts) can be observed in the

CO2 status field chiller status field
a) Off a) Main and backup off
b) Start cool procedure (2 secs)  
| c) Valves to default (2 secs) d) Switch off transfer line (2 secs) e) Heating accu (15 mins) f) Pumping warm liquid (30-60 secs) g) Starting chiller (30 mins) g) Main Chiller (SA) on/back-up chiller (SB)on h) Load via bypass (2 secs) i) Cooling Transfer line (30 mins) j) Cool accu and detector (30 mins) k) Allow detector on

  • Push the button “start TL(TR) A-side (C-side)” to start the cooling of the A-side(C-side).
  • Verify that the set-point is correct in the field “setpoint”
    • +10'C for the backup chiller SB
    • -25'C for the main chiller SA
  • Follow the status in the status field (see section 5 for details)
    • Verify that the right mode (SA or SB) is started
    • Verify that the correct half is cooled
  • To switch off push the button “Stop TL & TR”

For more information see manual

-- MartinVanBeuzekom - 24 Apr 2008

This topic: LHCb > WebHome > LHCbVELO > VELOOperatingManuals > Cooling
Topic revision: r2 - 2008-05-05 - MartinVanBeuzekom
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