D-EIMHP01501-22_01EN 15/20
Table 8 – Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment
Notes:
7. Monthly activities include all the weekly ones.
8. The annual (or early season) activities include all weekly and monthly activities.
9. Daily reading of the operating values of the unit allows maintaining high observational standards.
10. Check for any dissolved metals.
11. Clean condenser banks with clean water and water heat exchangers with appropriate chemicals. Particles and fibres
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 airborne particles, it might be necessary to clean the condenser bank more
often.
12. Units placed or stored in a Highly Aggressive Environment for long time without operation are still subject to those
routine maintenance steps.
Monthly Yearly/Seasonal
List of Activities (Note 8) Weekly (Note 1) (Note 2)
General:
Reading of operating data (Note 3)
Visual inspection of unit for any damage and/or loosening
Verification of thermal insulation integrity
Check of flow switch operation
Verification of start-up sequence
Verify contactor wear – Replace if necessary
Verify that all electrical terminals are tight – Tighten if necessary
Clean inside the electrical panel
Visual inspection of components for any signs of overheating
Verify operation of compressor and electrical resistance
Measure with the Megger the compressor motor insulation
Check for any refrigerant leakage (leak test)
Analyse compressor vibrations
Check for any water leakage
Check hydraulic connections
Check the pressure at the exchangers water inlet
Check the glycol concentration
Check the water flow rate
Check the cleaning of the BPHE
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