MVD cooling in the 1008 annex
A temporary cooling system has been set up in the side room of 1008, where the
MVD lives when it is not in the IR.
The system is a simplified version of
what we have in the IR. The chiller services two
circuits:
- the motherboard liquid cooling circuit: in this part, cold water from
the chiller runs through a small liquid->liquid heat exchanger. On the other
side of this heat exchanger is the motherboard cooling loop, with a pump,
degassing can and fill/exhaust line. These items sit on top of the chiller.
- the plenum air cooling circuit: on the other side of the chiller output
"T", cold water goes to the liquid->air heat exchanger box, the big box that sits on the
floor behing the bench. The fan on top of the box forces air around through the
MCM plenum.
The chiller needs running water to dump waste
heat into. Normally, we are connected to the orange hoses, which come from
overhead. Note that there are 2 sets - one set has a small section of Polyflow
tubing. This is the set you want to install. There sould always be flow
between the supply and return of the building cooling water, even when the
chiller is not connected. That is why there is a 'shortcircuit' hose between
the two. When the chiller is not connected, open the valves on this loop so
water can flow.
However, building cooling water
is shut off for winter/spring 2002. Instead, water comes from the utility sink
in the back of the tech's area. Follow the green garden hoses down the
hallway. At the end, there is a quick-connect that clicks onto the tap in the
bathroom.
The chiller needs 208V 1-phase power. There is a special extension cord which
comes down from the overhead cable tray. The cord runs across to the other
side of the room, where it plugs into an overhead-mounted outlet box.
Operation:
- Turn on the 'building water': either the orange hoses or the sink in
the back. A small amount of flow (1-2 gallons/min) is enough.
- Turn on the chiller: Button on the right. The display comes on, and
shows the temperature of the working fluid. You should see the temperature
start at room temperature, and then creep down to the setpoint. Also you can
see water circulating in the reservoir in the top of the chiller under the
plexiglass window.
- Turn on the power to the fan and pump. There is a power strip on top of
the bench with everything plugged in.
Turning off:
- Make sure all power to the MVD is turned off
- Turn off the power strip with the fan and pump
- Turn off the chiller (the orange power LED stays on)
- Turn off the building water
Last update 11 Feb 2002 - HvH
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