User's Manual Rev B / February 2021 / M125 Helium Compressor
97-00020-000
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5.2.4
Ambient Conditions and Coolant Connection
Ambient Condition
s:
When the compressor is in operation, the ambient temperature should be between40°F to 104°F (5°C to 40°C). The
compressor unit should be set up in a non-condensing environment. An optimal location would be in a well ventilated (or
temperature controlled) location.
Coolant Connection:
Caution:
For water-cooled compressor models, the water used in the unit operation must meet the
specifications indicated in Section 4.2.
Caution:
Failure to comply with the coolant specifications may result in serious damage to the compressor and
may void the warranty on the unit.
Identify the inlet and outlet connection ports first before connecting the hoses. The water supply line should be connected
to the inlet port on the compressor.
Periodically check the coolant flow rate and temperature to ensure the proper operation of the compressor unit.
5.2.5
Connecting the Helium Flex lines
Caution:
Attach or detach the helium flex lines only when the power to the compressor unit is switched off.
Never twist the helium flex lines during the installation process.
Before connecting the helium flex lines, follow these steps:
1.
Identify the helium “Return” (low pressure) and “Supply” (high pressure) ports on the compressor front panel.
2.
Clearly mark the helium flex line that will be used to connect to the corresponding “Supply” and “Return” port on
the cryopump or cold head,
Note:
The helium flex lines are equipped with self-sealing couplings which can be attached and detached without helium
escaping.
Follow these steps to connect the helium flex lines:
1.
Unscrew the protective caps from the couplings and keep the caps for future use.
2.
Check the connectors for cleanness. When necessary, use lint-free clean cloth or soft brush to clean the
connectors.
3.
Check the flat seals on the male couplings and make sure they are properly placed. Replace any missing or
defective seals.
4.
Use only the open wrenches supplied with the installation kit. For a 1/2" coupling, tighten with a 1-3/16" wrench
and stabilize with a 1" wrench.
5.
Tighten down all couplings as far as possible and then back off by one quarter turn to relieve strain.
If the flex lines need to be bent to a radius of less than 8" (203 mm), then a 90-degree helium elbow needs to be installed
(see Section 3.3
for the part number).
