Chillers description and operations
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The EMC Chillers
The Water Chiller
System description:
The main task of the water chiller is to keep the Barrel Front End electronics cool. The chiller itself is located in the IR-2 hall next to the Electronics house. It is easy to recognize as you can see on the picture. The chiller consists of a closed water circuit, a pump, a heat exchanger connected to the cooling tower water and a surge tank. The temperature is regulated by controlling the amount of water going through the heat exchanger. On the front view you can see the control panel with various displays described below.
Fig 1: Chiller front view Fig 2: Chiller pump Fig 3: Chiller heat exchanger
The control panel of the chiller is quite simple. The main switch on Figure 4 should never be touched. The supply temperature (Figure 6) can be adjusted, but it should be done by the expert only. We are running the chiller at 67 degrees Farenheit(~20C). This is adequate to ensure good cooling of the IOBs. The flow is set at 60 gallons per minute (see Figure 9). Below the flow display is a switch used to disable the flow alarm. During the startup procedure the flow can be unstable and therefore trigger alarms. The switch is there to disable those alarms during the startup phase. It should be enabled again when the chiller is running. The surge tank is pressurized at 8 Psi with inert gas. This helps keeping a stable flow. On Figure 7 you can see 4 red "lights" in a row and a second row of control buttons (one white, one green and one black). The white button enables the pump.
Fig 4: Chiller Main switch Fig 5: Chiller Return Temperature Fig 6: Chiller Supply Temperature
Fig 7: Chiller Alarm Lights Fig 8: Chiller Pressure Regulation Fig 9: Chiller Flow Display
Operation Instructions: Some news item or blah blah
  1. Starting the chiller after an alarm.
    - check the water level in the surge tank. It should be more than one inch.
    - check the surge tank pressure. It should be around 8 psi.
    - check that the pump switch is in ON position - press the reset button
Emergency procedures: Some news item or blah blah

Page authors: Helmut Marsiske , Pierre Alexandre Fischer