Section 6 Wiring and Piping Removal and Storage
6-2
ULVAC CRYOGENICS INCORPORATED
1. Stop supplying cooling water to the compressor unit and stop the water flow.
2. Disconnect the water supply pipe from the “COOLING WATER IN” fitting on the
compressor. DO NOT disconnect the water pipe from the “COOLING WATER OUT”
fitting. Note that cooling water might drip from the pipe when disconnecting it.
3. Connect a hose for air blowing to the “COOLING WATER IN” fitting.
4. Increase the air pressure inside the hose from 0 to 0.2MPaG. Keep air blowing for
more than 30 seconds to blow out the water inside the compressor (The water goes
out from the compressor through the water pipe at the “COOLING WATER OUT”
fitting).
. Keep air blowing for
more than 30 seconds to blow out the water inside the compressor (The water goes
out from the compressor through the water pipe at the “COOLING WATER OUT”
fitting).
5. Stop air blowing. 5. Stop air blowing.
6. Disconnect the hose for air blowing from the “COOLING WATER IN” fitting. 6. Disconnect the hose for air blowing from the “COOLING WATER IN” fitting.
7. When transferring the compressor to other location, disconnect the water pipe from
the “COOLING WATER OUT” fitting as well.
7. When transferring the compressor to other location, disconnect the water pipe from
the “COOLING WATER OUT” fitting as well.
6.1.2 Disconnecting flexible hoses 6.1.2 Disconnecting flexible hoses
To disconnect flexible hoses from the compressor, refer to “Section 4.3 Connecting and
disconnecting helium flexible hoses”.
To disconnect flexible hoses from the compressor, refer to “Section 4.3 Connecting and
disconnecting helium flexible hoses”.
Put the dust caps or dust plugs back on the compressor and the removed flexible hoses
to keep them in storage.
Put the dust caps or dust plugs back on the compressor and the removed flexible hoses
to keep them in storage.
6.1.3 Disconnecting cables 6.1.3 Disconnecting cables
Disconnect the refrigerator cable from the refrigerator. It is not necessary to disconnect
the refrigerator cable from the compressor.
Disconnect the refrigerator cable from the refrigerator. It is not necessary to disconnect
the refrigerator cable from the compressor.
Disconnect input-output remote cables from the compressor side. Disconnect input-output remote cables from the compressor side.
Disconnect the input power cable from the compressor. Refer to “Section 4.6.1
Connecting the input power cable” and disconnect the cable in reverse order.
Disconnect the input power cable from the compressor. Refer to “Section 4.6.1
Connecting the input power cable” and disconnect the cable in reverse order.
6.1.4 Transferring the compressor 6.1.4 Transferring the compressor
Unlock the casters of the compressor. Refer to “Section 3.3 Unpacking” when moving
the compressor.
Unlock the casters of the compressor. Refer to “Section 3.3 Unpacking” when moving
the compressor.
6.2 Maintenance in storage site 6.2 Maintenance in storage site
The compressor must be stored in a place indoors and meet the requirements in “Section
1 Table 1-4 Installation environment and operation requirements”. Also the storage site
must have good ventilation to avoid suffocation in case of unexpected helium leak.
The compressor must be stored in a place indoors and meet the requirements in “Section
1 Table 1-4 Installation environment and operation requirements”. Also the storage site
must have good ventilation to avoid suffocation in case of unexpected helium leak.
Place the compressor on a flat floor and lock all the casters. Place the compressor on a flat floor and lock all the casters.
Remove the piping and wiring from the compressor and put dust caps or dust plugs on
the helium line connectors.
Remove the piping and wiring from the compressor and put dust caps or dust plugs on
the helium line connectors.
Do not perform the removing procedure above when the compressor is turned ON or cooling
water is being supplied. Failure to observe this warning may result in severe bodily injury or
fatal accident.
CAUTION
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