MAINTENANCE
35
AVOID INJURY.
Disconnect gas lines only when the compressor is stopped.
Disconnecting the cold head while it is cold may create excessively high internal
pressure as the gas warms. Material failure and uncontrolled pressure release
can cause serious injury.
AVOID INJURY.
The compressor is charged with helium gas. Vent the
compressor to atmospheric pressure before disassembly, except when
disconnecting adsorber or the gas lines. Uncontrolled pressure release can
cause serious injury.
AVOID INJURY.
Never use compressed helium gas from a cylinder without a
proper regulator. Overpressure can cause serious injury if the system equipment
ruptures.
AVOID INJURY FROM BURNS.
During operation, some surfaces in the
compressor capsule become hot. Allow the compressor to cool for 1/2 hour after
shutdown before removing the cover for maintenance.
AVOID INJURY.
When handling pressurized gas lines and other pressurized
equipment, always wear eye protection. Never apply heat to a pressurized gas
line or other pressurized components.
PRESERVE YOUR WARRANTY.
Modification to equipment without the consent
of the manufacturer will void the warranty.
AVOID CONTAMINATION.
Follow the charging and venting procedure to
prevent reversed flow of system gas. Do not charge through the supply coupling.
Do not vent through the return coupling. Reversed flow can contaminate the
system with compressor oil.
Summary of Contents for HC-4E1
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Page 55: ...Troubleshooting 51 Figure 9 HC 4E1 Wiring Diagram...
Page 56: ...Troubleshooting 52 Figure 10 HC 4E2 Wiring Diagram...
Page 57: ...Troubleshooting 53 Figure 11 HC 4E1 Electrical Schematic...
Page 58: ...Troubleshooting 54 Figure 12 HC 4E2 Electrical Schematic...
Page 61: ...Parts 57 Figure 13 Parts Identification 18 21 19 13 14 20 16...