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EWWDС14I-SS
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Daikin EWWDС14I-SS [40/51] Specification text

• Single Unit • Water cooled chiller, standard efficiency • EWWD-I-SS

• Hydronic Systems • Single Unit

10 Specification text

10 - 1 Specification Text

Features and advantages

The EWWD~I- water cooled chillers, featuring 1, 2 or 3 single screw compressors, are manufactured to satisfy the requirements

of the consultants and the end user. Units are designed to minimise energy costs while maximising the refrigeration capacities.

Daikin’s chiller design experience, combined with outstanding features makes the EWWD~I- chiller unmatched in the industry.

Seasonal quietness

The compressor design with a single screw and twin rotors allows a constant gas ﬂ ow. This compression process completely

eliminates gas pulsations. The oil injection also results in signiﬁ cant mechanical noise reduction.

The twin gas compressor discharge chambers are designed to act as attenuators, based on the harmonic wave principle with

destructive interference, thus always resulting equal to zero. The extremely low noise compressor performance affords the use

of EWWD~I- chiller for all applications.

The reduced number of vibrations produced from the EWWD~I- chiller offers a surprisingly quiet operation eliminating the

noise transmission through the structure and the chilled water piping system.

Inﬁ nitely capacity control

Cooling capacity control is inﬁ nitely variable by means of a screw compressor

controlled by microprocessor system. Each unit has inﬁ nitely variable capacity

control from 100% down to 25% (one compressor unit), down to 12,5%

(two compressors units) and down to 8.3% (three compressors units). This

modulation allows the compressor capacity to exactly match the building

cooling load without any leaving evaporator water temperature ﬂ uctuation.

This chilled water temperature ﬂ uctuation is avoided only with a stepless

control.

With a compressor load step control in fact, the compressor capacity, at

partial loads, will be too high or too low compared to the building cooling load.

The result is an increase in chiller energy costs, particularly at the part-load

conditions at which the chiller operates most of the time.

Units with stepless regulation offer beneﬁ ts that the units with step regulation are unable to match. The ability to follow the

system energy demand at any time and the possibility to provide steady outlet water temperature without deviations from the

set-point, are the two points that allow you to understand how the optimum operating conditions of a system can be met only

through the use of a unit with stepless regulation.

Code requirements – Safety and observant of laws/directives

All water cooled units are designed and manufactured in accordance with applicable selections of the following:

Construction of pressure vessel 97/23/EC (PED)

Machinery Directive 2006/42/EC

Low Voltage 2006/95/EC

Electromagnetic Compatibility 2004/108/EC

Electrical & Safety codes EN 60204–1 / EN 60335-2-40

Manufacturing Quality Stds UNI – EN ISO 9001:2004

FTA_1-2_Rev.00_1

ELWT ﬂ uctuation with stepless capacity control

ELWT ﬂ uctuation with steps capacity control (4 steps)

Compressor Load

time

leaving water

temperature [°C]

% cooling capacity

Building Load