Daikin EWWH955DZXEA2 [19/32] Operation

D-EIMWC01405-18EN- 19/32

3 OPERATION

3.1 Operator’s responsibilities

It is important that the operator becomes familiar with the equipment before operating the machine. In addition to reading

this manual, the operator should study the operation manual and the wiring diagram supplied with the unit to understand

commissioning, operation and the shutdown sequence as well as the shutdown mode and safeties.

During initial machine start-up, the Daikin technician is available to answer any questions and instruct on proper operating

In any case, it is essential to follow the instructions below during operation and maintenance:

 Do not allow unauthorized and/or unskilled personnel to access the unit.

 It is forbidden to access the electrical components without having opened the unit main switch and switched off

the power supply.

 It is forbidden to access the electrical components without using an insulating platform. Do not access electrical

components if water and/or moisture are present.

 Ensure that all operations on the refrigerant circuit and on components under pressure are exclusively carried

out by qualified personnel.

 Compressors should only be replaced by qualified personnel.

 Sharp edges can cause injuries. Avoid direct contact.

In case of accidental injury or unease, it is necessary to:

 Keep calm.

 Press the alarm button if present in the installation site.

 Immediately contact any emergency personnel in the building or the call the Emergency Services.

 Wait until emergency personnel arrive and do not leave the injured person alone.

3.2 Unit description

The machine is made up of a latest generation, high efficiency flooded shell and tube evaporator, with the refrigerant

outside the tubes and the water to be cooled flowing inside the tube..

A shell and tube condenser where the refrigerant condenses outside the tubes while the cooling water flows inside of the

conditions. Refrigerant flow is controlled by the compressor that continuously monitors inverter temperature.

The compressor, controlled by inverters, changes its cooling load according to the rotational speed decided by the

controller. In this way the machine perfectly adapts to system operating conditions to maximize performance.

The cooling circuit also installs an electronic overflow valve that, in addition to managing the level of refrigerant in the heat

exchangers, guarantees the correct operation of the compressor, keeping it within the foreseen limits.

All the described components are managed by an innovative microprocessor control system that, by monitoring all the

machine operating parameters, optimizes operations. A diagnostic system helps the operator in identifying alarm and fault

causes.