Daikin Air Cooled Chiller EWAH770TZSLC2006

Visual inspection of unit for any damage and/or loosening

Visual inspection of components for any signs of overheating

Verify operation of compressor and oil heater

Clean air intake filters of the electrical panel

Check for any refrigerant leakage

Verify filter dryer pressure drop

Verify oil filter pressure drop. Replace the oil filter when the pressure drop across it reaches 2.0 bar.

Check security valves. 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.

Enter the TAN (Total Acid Number)

Sign off on the compressor oil check

Verification of thermal insulation integrity

Clean and paint where necessary

Water analysis: Check for any dissolved metals

Verification of control sequence

Verify contactor wear – Replace if necessary

Verify that all electrical terminals are tight – Tighten if necessary

Clean inside the electrical control board

Measure compressor motor insulation using the Megger

Verify operation of all ventilation fans in the electrical panel

IMPORTANT: In environments with a high concentration of air-borne particles, it might be necessary to clean the condenser coils more often.

Clean condenser banks with clean water

Clean water heat exchangers with appropriate chemicals

IMPORTANT: Particles and fibers could clog up the exchangers, especially for water exchangers pay attention if water rich in calcium carbonate is used.

Check for increase in pressure drops

Check for decrease in thermal efficiency

IMPORTANT: An increase in pressure drops or a decrease in thermal efficiency means that the heat exchangers are clogged.

IMPORTANT: In environments with a high concentration of air-borne particles, it might be necessary to clean the condenser bank more often.

NOTE: 1 Monthly if Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment

Warning: Failure to clean an E-coated coil will void the warranty and may result in reduced efficiency and durability in the environment.

If the coil is visibly dirty, proceed with the following steps. If not, skip to step 7.

Is the coil clean after the first cleaning?

If the coil is not clean after the first cleaning, repeat steps 4-6.

Steps for removing soluble salts