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D-EIMAC01706-18EN- 24/32
Table 7
– Standard Routine Maintenance Plan
List of Activities
Weekly
Monthly
(Note 1)
Annual/
Seasonal
(Note 2)
General:
Reading of operating data (Note 3)
X
Visual inspection of unit for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Clean and paint where necessary
X
Analysis of water (4)
X
Check of flow switch operation
X
Electrical Installation:
Verification of control sequence
X
Verify contactor wear
– Replace if necessary
X
Verify that all electrical terminals are tight
– Tighten if necessary
X
Clean inside the electrical control board
X
Visual inspection of components for any signs of overheating
X
Verify operation of compressor and electrical resistance
X
Measure compressor motor insulation using the Megger
X
Clean air intake filters of the electrical panel
X
Verify operation of the ventilation system in the electrical panel
X
Refrigeration circuit:
Check for any refrigerant leakage (leak test)
X
Verify refrigerant flow using the liquid sight glass
– Sight glass full
X
Verify filter dryer pressure drop
X
Analyze compressor vibrations
X
Analyze compressor oil acidity (Note 7)
X
Check the security valve (Note 5)
X
Condenser section:
Check the cleaning of condensing coils and water heat exchangers (Note 6)
X
Verify that fans are well tightened
X
Verify the condenser coil fins - Remove if necessary
X
Notes
:
1.
Monthly activities include all the weekly ones.
2.
The annual (or early season) activities include all weekly and monthly activities.
3.
Daily reading of the operating values of the unit allows maintaining high observational standards.
4.
Check for any dissolved metals.
5.
Check that the cap and the seal have not been tampered with. Check that the drainage connection of the safety valves is not accidentally occluded by
foreign objects, rust or ice. Check the manufacturing date on the safety valve and replace it, if necessary, in compliance with the national laws in force.
6.
Clean condenser banks with clean water and water heat exchangers with appropriate chemicals. Particles and fibers could clog up the exchangers,
especially for water exchangers pay attention if water rich in calcium carbonate is used. An increase in pressure drops or a decrease in thermal
efficiency means that the heat exchangers are clogged. In environments with a high concentration of air-borne particles, it might be necessary to clean
the condenser bank more often.
7.
TAN (Total acid number):
0.10 : No action
Between 0.10 and 0.19: Replace anti-acid filters and re-check after 1000 running hours. Continue to replace the filters
until the TAN is below 0.10.
0.19 : replace oil, oil filter and oil filter dryer. Verify at regular intervals.
8.
Units placed or stored in a Highly Aggressive Environment for long time without operation are still subject to those routine maintenance steps.