Reciprocating Compressor M Series
1-13
Settings
Refer to the table below for settings Oil pressure failure protection equipment (OP). High pressure protection
equipment (HP) Low pressure control equipment (LP), and make sure to provide users of this compressor
with necessary information.
Table 1-3 Setting examples
Compressor
failure
Compressor
enabled
Manual reset
Low pressure control (LP) Depends on refrigerant and system in use Automatic reset
z For high pressure protection (HP), set value lower than the safety relief valve. Set the value to
protection equipment to detect an error immediately. Measure pressure electrically and generate
an alarm by a control circuit, to generate a pre-alarm when the pressure is approaching the
abnormal value.
Inspection Method/Cycle
Each compressor¶V protection equipment requires operational test for function and accuracy. Formulate the
inspection method and cycle for each of the compressor¶V protection equipment, and make sure to provide
users of this compressor with necessary information.
z Make sure to set and test HP safety device at or below safety relief valve set
point. If HP safety device is not set or tested at proper value, this may cause
rupture or release of refrigerant
z For operational test, use devices such as pressurize tester to check that alarms
and switches operate normally. Do not operate the compressor with all the valves
closed, or in any other dangerous conditions.
z If oil pressure failure protection (OP) or high pressure protection (HP) shuts down
the system, make sure to eliminate the cause of it before resetting the
compressor.
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