Daikin DWME Operation manuals

Installation, Operation and Maintenance Manual

D – EIMWC01101-12EN

Original instructions

Frictionless Centrifugal Chiller

DWME

Refrigerant: R-134a

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Typical refrigerant circuit – Condenser and evaporator water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for exact water connections.

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Legend

HPS

Compressor Motor Compressor Check Valve Condenser Shut-off valve Electronic Expansion Valve Evaporator Shut-off valve Strainer Solenoid valve Shut-off valve Filter dryer Shut off valve Strainer Stepper motor valve Solenoid valve VFD Cooler Changeover device Pressure relief valve Sight glass VFD Controller Solenoid valve Condenser water connections Evaporator water connections Pressure sensor Temperature sensor High pressure switch

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This manual is an important supporting document for qualified personnel but it is not intended to replace such personnel.

Thank you for purchasing this chiller

READ THIS MANUAL CAREFULLY BEFORE INSTALLING AND STARTING UP THE UNIT. IMPROPER INSTALLATION COULD RESULT IN ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR OTHER DAMAGE TO THE EQUIPMENT OR INJURE TO PEOPLE. THE UNIT MUST BE INSTALLED BY A PROFESSIONAL OPERATOR/TECHNICIAN UNIT STARTUP HAS TO BE PERFORMED BY AUTHORIZED AND TRAINED PROFESSIONAL ALL ACTIVITIES HAVE TO BE PERFORMED ACCORDING TO LOCAL LAWS AND REGULATION.

UNIT INSTALLATION AND START UP IS ABSOLUTELY FORBIDDEN IF ALL INSTRUCTION CONTAINED IN THIS MANUAL ARE NOT CLEAR.

IF CASE OF DOUBT CONTACT THE MANUFACTURER REPRESENTATIVE FOR ADVICE AND INFORMATION.

Description

The unit you bought is a “water cooled chiller”, a machine designed to cool water (or water-glycol mixture) within the limits herebelow reported. The unit operation is based on steam compression, condensation and evaporation according to reverse Carnot cycle.The main components are:

- Centrifugal compressor to rise the refrigerant steam pressure from evaporation pressure to condensation pressure

- Evaporator, where the low pressure refrigerant liquid evaporates cooling the water.

- Condenser, where high pressure steam condensates rejecting heat removed from the chilled water in the water thanks to a water cooled heat exchanger.

- Expansion valve to reduce the pressure of condensed liquid from condensation pressure to evaporation pressure.

General Information

All units are delivered with wiring diagrams, certified drawings, nameplate; and DOC (Declaration Of Conformity); these documents show all technical data for the unit you have bought and they MUST BE CONSIDERED ESSENTIAL DOCUMENTS OF THIS MANUAL.

In case of any discrepancy between this manual and the equipment’s documents please refer to on board documents. In case of any doubt contact the manufacturer representative. For other data information of this family of unit, see the Product Manual.

The purpose of this manual is to allow the installer and the qualified operator to ensure proper installation, commissioning and maintenance of the unit, without any risk to people, animals and/or objects.

Receiving the unit

The unit must be inspected for any possible damage immediately upon reaching final place of installation. All components described in the delivery note must be inspected and checked. Should the unit be damaged, do not remove the damaged material and immediately report the damage to the transportation company and request they inspect the unit. Immediately report the damage to the manufacturer representative, a set of photographs is helpful in recognizing responsibility. Damage must not be repaired before the inspection of the transportation company representative. Before installing the unit, check that the model and power supply voltage shown on the nameplate are correct. Responsibility for any damage after acceptance of the unit cannot be attributed to the manufacturer.

Operating limits

Storing

If the chillers have to be stored prior the installation, the following warnings have to be observed. Store the chillers inside, at ambient temperatures lower than 45°C.

Do not remove the protective plastic. Do not leave the unit exposed to the elements.

Do not expose the chillers to direct sun light. Keep the chillers far from heat sources. Storing below the minimum temperature may cause damage to components. Storing above the maximum temperature causes opening of safety valves. Storing in condensing atmosphere may damage electronic components.

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