Daikin Air Cooled Chiller EWFH-TZ-D

IMPORTANT: This procedure should be performed by trained personnel only.

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

If not, clean condenser banks with clean water.

Are the water heat exchangers clean?

If not, clean water heat exchangers with appropriate chemicals.

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

Is there an increase in pressure drops or a decrease in thermal efficiency?

If yes, this means that the heat exchangers are clogged and need to be cleaned.

Open all isolation and / or shut-off valves

Verify that the unit is pressurized with refrigerant in all of its parts before making the connection to the hydraulic circuit.

Check the oil level in the compressors

Control wells, thermometers, manometers, controls, etc. installed

Availability of at least 25% of the machine load for testing and control settings

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

Enter the TAN (Total Acid Number)

Sign off on the compressor oil check

Warning: This check requires an authorized agency for chillers in category II → III as per European Directive 2014/68/EU (PED).

Is the chiller in category II → III?

If the chiller is not in category II → III, stop the procedure and report to the supervisor.

Issues found during the inspection

Authorized agency representative's signature