mycom 1612LSC series User Manual

2202L5JE-DA-C5-N_2015.05.
5 Maintenance and Inspection
Compound 2-stage Screw Compressor 5.2 Maintenance and Inspection List
1612LSC Speed Increaser Type
5-3
5.2 Maintenance and Inspection List
5.2.1 Daily Management
As daily management, check the items listed in Table 5-1 "Daily Inspection Items" and record the
results.
Logging these operation data on a daily basis aid in finding out any abnormal conditions of the
compressor. This is significantly effective in preventing compressor failures.
It is particularly important to check whether the temperature/pressure correlations related to the
refrigerant evaporation and condensation is proper. This makes it possible to quickly find out problems
in the compressor or the system.
If a failure or accident should occur in the compressor or the system, the operation logbook will help
determine the cause and take prompt and proper actions.
Table 5-1 Daily Inspection Items
Inspection Items Inspection Contents Check Points and Actions
Compressor
Operating hours hr Total operating hours  Judgment of periodic
maintenance timing
Suction pressure MPa
Note 1
Difference from the set value
of evaporation temperature
equivalent pressure
 Contamination on the cooling
pipe surface
 Temperature, flow rate, etc. of
the object to be cooled
Intermediate pressure MPa Pressure difference from
rated operation (normal
value)
 If it is too high， check high-
stage. If it is too low check
low-stage.
Discharge pressure Mpa Difference from cooling water
temperature equivalent
condensing pressure
 Contamination on condenser
cooling pipes
 Non-condensable gases mixed
into the system
 Quantity, temperature, etc. of
cooling water
Oil supply pressure MPa Difference from discharge
pressure
 Whether differential pressure is
decreasing
 Operation with liquid flow-back
 Whether compressor parts are
worn
Oil filter pressure loss MPa Pressure difference between
oil filter inlet and outlet
 Contamination of lubricating oil
 Clogging of oil filter element
Suction temperature °C Whether within upper and
lower limits
 Temperature, flow rate, etc. of
the object to be cooled
Degree of superheat
for suction
°C Whether degree of
superheat is proper
 Adjust expansion valve
 Insufficient refrigerant flow
Intermediate
temperature
°C Whether within upper and
lower limits
 Adjust intermediate expansion
valve
Discharge
temperature
°C Whether within upper limit  Non-condensable gases mixed
into the system
 Oil supply temperature,
insufficient oil supply
 Compressor failure

mycom 1612LSC series Specifications

General

Brand	mycom
Model	1612LSC series
Category	Air Compressor
Language	English