Daikin Air Cooled Chiller EWAS-TZ-D

Warning: This check requires an authorized agency

Is the chiller in category II → III according to the European Directive 2014/68/EU (PED)?

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

Disconnect the unit from power supply.

Wait for the fans to stop completely.

Ensure that the fan blades cannot move for any reason (for example: wind).

If present, remove the ”V” shaped panels.

Remove surface dirt, leaves, fibres, etc. with a vacuum cleaner (preferably with a brush or other soft attachment rather than a metal tube), compressed air blown from the inside out, and/or a soft bristle (not wire!) brush. Do not impact or scrape the coil with the vacuum tube, air nozzle, etc.

Note: Use of a water stream, such as a garden hose, against a surface loaded coil will drive the fibres and dirt into the coil.

Rinse the MCHE off gently, preferably from the inside out and top to bottom, running the water through every fin passage until it comes out clean. Microchannels fins are stronger than traditional tube & fin coil fins but still need to be handled with care.

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.

Check for particles and fibers that could clog up the exchangers

IMPORTANT: Pay special attention if water rich in calcium carbonate is used.

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

Check if the heat exchangers are clogged

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

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.

Sign off on the coil maintenance

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.