mycom 2016 C Series Instruction Manual page 48

Inspection Items
Oil supply
temperature
Capacity control
Indicated load
Leak from
mechanical seal
Noise and vibration
Motor current
Oil level of oil
separator
Fluid level in the
receiver
Check for refrigerant
leak
Note 1 : Unless otherwise noted, the pressure unit MPa represents the gauge pressure in this
manual.
 Daily Maintenance Items
Lubrication oil level
1.
When the oil level in the oil separator reaches the lower limit, charge lubricant by referring to the
instruction manual of the unit.
Replacing oil filter
2.
When the differential pressure between the lubrication oil supply pressure and the discharge
pressure is 0.15 MPa or higher, replace the oil filter. At the beginning of the operation, the
differential pressure of the oil filter may increase quickly.
Cleaning of suction strainer
3.
When the compressor operating hours exceeds 500, check the suction strainer. If a temporary
filter is installed for the initial stage of operation, remove it.
At the beginning of the operation or after periodical check, the differential pressure between the
front and back of the suction strainer may increase quickly. If the differential pressure becomes
large, check and clean the suction strainer.
Lubricant leak rate from mechanical seal
4.
If much oil leaks from the mechanical seal, determine the leak rate per hour. The following table
shows guidelines for allowable leak rate and the rate at which inspection must be done.
If any problem (damage, etc.) is found in mechanical seal, replace the mechanical seal.
Allowable leak rate
Rate at which inspection must be done
Note: The specifications above are just guidelines. They are not guaranteed values.
Contamination on the cooling water side of the cooling pipes of condenser and oil cooler
5.
Clogging and contamination of the cooling pipe is largely affected by the quality of cooling water.
When the oil temperature and discharge pressure gradually rise during the initial stage of
operation, inspect and clean the cooling water side of oil cooler and condenser even when the
time has not yet come at which inspection must be done.
Compound 2-stage Screw Compressor 2016**C
Inspection Contents
°C Whether within upper and
lower limits
Whether operation is normal 
%
ml Leak per hour
Abnormal noise/vibration
A Whether it is higher than the
current at test run
- Oil level
- Fluid level
leak or not
-
Table 5-2 Guideline for Leak from Mechanical Seal
 Contamination on cooling pipes
of oil cooler
Damage to solenoid valve coil
 Improper adjustment of manual
control valve of
electromagnetic assembly
 Mechanical seal failure
 Compressor failure
 Compressor failure
 Oil entry
 Replenish oil
 Replenish refrigerant
 The machine room and the
load side facilities
2016**C
≤ 3 ml/h
≥ 9 ml/h
5-3
2200LZJE-HO-C6-N_2013.12.
Chapter 5 Maintenance
Check Items/Actions
5.2 Maintenance List