Daikin EWWH955DZXEA2 [6/32] Introduction

D-EIMWC01405-18EN- 6/32

1 INTRODUCTION

This manual provides information on the functions and standard procedures for all series units and is an important support

document for qualified personnel but can never replace them.

All units are supplied complete with wiring diagrams and dimensional drawings that provide information about the size and

weight of each model.

In case of discrepancies between the content of the manual and the documentation that came with the unit, always rely to

the wiring diagram and dimensional drawings because they are an integral part of this manual.

Read this manual carefully before installing and starting up the unit.

Improper installation can cause: short circuits, leaks, fire or other damages to the equipment or personal injuries.

The unit must be installed by professionals/professional technicians in accordance with current laws of the country of

installation.

The unit must also be started by authorized and trained personnel and all activities must be conducted in accordance and

in full compliance with local standards and laws.

IF THE INSTRUCTIONS IN THIS MANUAL ARE NOT CLEAR, DO NOT INSTALL AND/OR START UP THE UNIT.

If in doubt, for service and further information, contact the manufacturer's authorized representative.

1.1 General Description

Daikin water chillers, with centrifugal compressors and magnetic bearings, are completely factory assembled and tested

before shipment.

The EWWD(H) DZ range consists of models with a single compressor and single cooling circuit (from 320 to 740 kW) and

models with two compressors and single cooling circuit (610 to 1480 kW)

The controller is pre-wired, set and tested at the factory.

Only normal connections are required on site such as piping, electrical connections and pump interlocks, making

installation easier and more reliable. All operating safety and control systems are factory installed in the control panel. The

instructions in this manual apply to all models of this series unless otherwise indicated.

1.2 Application

The EWWD(H) DZ units with centrifugal compressor and adjustment inverters are designed and constructed to cool

buildings or industrial processes. Daikin technicians, specifically trained for this purpose, must start the final system for the

first time. Failure to follow this starting procedure affects the warranty.

The standard warranty covers parts of this equipment with proven defects in material or workmanship. Materials subject to

natural consumption are not, however, covered by the warranty.

The cooling towers used with Daikin units must be selected for a wide scope of application, as described in the "Operating

limits" section. From an energy savings point of view it is always preferable to keep the temperature difference between

the hot circuit (condenser) and the cold circuit (evaporator) to a minimum. However, it is always necessary to verify that

the machine works in the temperature range specified in this manual.

1.3 Information about R1234ze(E)

This product is equipped with refrigerant R1234ze(E) which has minimal impact to the environment, thanks to its low value

of Global Warming Potential (GWP). R1234ze(E) refrigerant is classified by European Directive 2014/68/EU as a Group 2

(non-dangerous) substance, as it is nonflammable at standard ambient temperature and non-toxic. Due to this, no special

precautions are required for storage, transport and handling.

Daikin Applied Europe S.p.A. products comply with applicable European Directives and refer for unit design to product

Standard EN378:2016 and industrial Standard ISO5149. Local authorities approval should be verified referring to European

Standard EN378 and/or ISO 5149 (where R1234ze(E) is classified A2L – Mildly flammable gas).