Daikin EWWH460DZXSA1 [27/32] Cleaning and storage

D-EIMWC01405-18EN- 27/32

4.3 Cleaning and Storage

A common cause of the equipment failure and subsequent service call is dirt. This can be prevented with regular

maintenance. Actions to be taken on system components must subject to dirt are:

 Clean the electrical panel ventilation and cooling filters, make sure ventilation correctly starts on the electrical

panel.

 Remove and clean the filters in the chilled water system, in the cooling water system at each inspection.

4.4 Seasonal maintenance

Before you turn off the unit for a long period of time and starting it again, proceed as follows:

4.4.1 Seasonal shutdown

1. Where the unit may be subject to freezing temperatures, the condenser and the cooling water pipes must be

disconnected and drained of all water. Blow dry air through the condenser; this operation will help to eliminate all

water. Both the condenser that the evaporator is not self-draining. If water remains in the pipes and the heat

exchanger, these can be damaged in case of freezing.

The forced circulation of the antifreeze solution through the water circuit is a sure way to eliminate the risk of

freezing.

2. Care should be taken to prevent the accidental opening of the water circuit shut-off valves.

3. If you are using a cooling tower and if the water pump is exposed to freezing temperatures, remove the pump drain

plug to prevent the accumulation of water.

4. Open the compressor switch and remove the fuses. Set the 1/0 manual switch to 0.

5. To avoid corrosion, clean and paint rusted surfaces.

6. Clean and drain the water tower on all units operating with a tower. Make sure tower emptying is effective. Follow a

good maintenance program to prevent the formation of limescale deposits both in the tower in the condenser. Take

into account that the atmospheric air contains many contaminants that increase the need of proper water

purification. The use of untreated water can result in corrosion, erosion, fouling or the formation of algae. We

recommend you contact an expert for reliable water purification.

7. Remove the condenser heads at least once a year to inspect the pipes and clean if necessary.

Daikin Applied Europe Spa cannot be held liable for damage caused by untreated or improperly

treated water.

4.4.2 Seasonal start up

Annual start up is a good time to perform the following checks:

1. Check and tighten all electrical connections.

2. The control circuit must be switched off for the entire time.

3. Replace the cooling tower pump drain plug if it was removed during previous season shutdown.

4. Install the main fuses (if removed).

5. Reconnect water lines and refill the circuit. Purge the condenser and check for leaks.

5 SERVICE SCHEDULE

It is important that all air conditioning systems receive adequate maintenance. The entire system benefits if the system is

in good conditions.

The maintenance program must be continuous from first system start: Full inspection must be made after three or four

weeks of normal operation and continue regularly.

Daikin Applied Europe offers a variety of maintenance services through its local Daikin service departments and through

a worldwide service organization and can adapt their services to the customer's needs.

For more information on service availability, contact your Daikin service department.