Инструкция на Чиллеры серии ARA бренда Uniflair

ARA

AIR-COOLED WATER CHILLERS 00182 - 00202 - 00232 - 00252 - 00302 - 00403 - 00504 AIR-COOLED HEAT PUMPS 00182 - 00202 - 00232 - 00252 - 00302 - 00403 - 00504 FREE COOLING CHILLERS A-D-L H-P-Q E 00182 - 00202 - 00232 - 00252 - 00302 ULTRA-LOW NOISE LEVEL FREE COOLING CHILLERS 00152 - 00182 - 00202…

Via dell’Industria, 10 35020 BRUGINE (Padova) Italy Tel. +39 (0)49 9713211 Fax. +39 (0)49 5806906 Internet: www.UNIFLAIR.com E-Mail: info@UNIFLAIR.com Release: Date: 1.4 Checked by: 2 01 - 12 – 2000

CONTENTS

WARNINGS SYMBOLS USED SAFETY Page. GENERAL DESCRIPTION Documentation included with the unit Available versions and accessories Data plate General description and intended use of the unit Access to main components Description of the main components of the unit Free cooling System - Free cooling…

This unit has been subjected to risk analysis under EC Directive 98/37/CEE (89/392/CEE). The technical solutions implemented during the design phase are described in the unit’s technical file. This equipment is manufactured to function safely for the purposes for which it was designed as long as the…

SYMBOLS USED

SYMBOL MEANING DANGER SYMBOL MEANING MOVING COMPONENTS IMPORTANT WARNING HOT SURFACES – DANGER OF BURNING HIGH VOLTAGE – ELECTRICAL RISK SHARP EDGES SAFETY The new range of UNIFLAIR ARA water chillers and heat pumps features state-of-the-art technology to give maximum reliability, safety, quietness…

GENERAL DESCRIPTION

DOCUMENTATION INCLUDED WITH THE UNIT Every ARA chiller is delivered complete with the following documentation: • ARA and microprocessor control instruction manuals • Unit installation diagrams • Diagrams of the refrigerant and hydraulic circuits of the unit • Electrical diagrams • List of spare…

AVAILABLE VERSIONS AND ACCESSORIES

Models Configurations Pump group Reservoir tank (only with pump group) Heat recovery Power supply Electrical accessories Control Serial connections Refrigerant Norms Refrigerant Accessories Pressure sensors Options ARA00152 (only M versions), ARA00182, ARA00202, ARA00232, ARA00252, ARA00302…

DATA PLATE

The chiller data plate is in the electrical panel and gives the following information: • Model of the unit • Serial number • Voltage, number of phases and power supply frequency for primary and auxiliary circuits • Current and power absorbed • OA (Operating current), FLA (Full load current) and LRA…

RESISTANCE TO THE ELEMENTS

Uniflair chillers boast excellent corrosion resistance and are built to withstand the harshest of conditions. The structure is in galvanised steel sheet painter with polyester powder; all external fastenings are in stainless steel. LOW NOISE LEVELS Even the basic units have very low noise levels…

ACCESS TO MAIN COMPONENTS

COMPRESSOR HOUSING To access the compressor housing, remove the 8 fixing screws 1 and lift panel A using the two front handles B . Removing panel A gives access to the compressor housing, the microprocessor control user terminal and to the optional high and low pressure manometers.. IG C 3 2 B A…

PUMP GROUP

To access the optional pump group and the free cooling pump remove the six fixing screws 6 and remove panel D using front handle E . To avoid contact with the fan blades there is a further steel protection panel F , fixed with screws. 6 E 7 ATTENZIONE PRIMA DI QUALSIASI INTERVENTO LEGGERE…

DESCRIPTION OF MAIN COMPONENTS

STRUCTURE These units are normally installed outdoors, often on the roof of a building. For this reason the structure of the unit is made entirely in galvanised steel, painted with corrosion-resistant polyester powder. All external fastenings are in stainless steel. The panels can be easily removed…

CHILLED WATER PUMP GROUP (optional)

The pump group for the circulation of chilled water is available in different configurations: - one pump (type “A”, “B” or “C”); - two pumps (one in stand-by); - one pump plus reservoir tank; - two pumps (one in stand-by) plus reservoir tank. The pumps, with 2-pole motors (2900 rpm), are fitted with…

FREE COOLING

During normal chiller functioning, the water consumed is treated in the brazed plate heat exchanger. When the external air temperature drops to such a level as to allow water pre-cooling, the control activates a recirculation pump which sends the water to a finned pipe coil, mounted in front of the…

RECOVERY OF CONDENSATION HEAT

Recovery of heat from de-superheating and condensation of the refrigerant leaving the compressor enables the production of hot water. Without heat recovery this heat is dissipated in the environment via the finned condenser coils. The diagram below shows the partial heat recovery circuit. The…

INSTALLATION GUIDE

TRANSPORT AND MOVEMENT The symbols on the packaging conform to the ISO7000 standard and are explained below: SYMBOL MEANING SYMBOL MEANING FRAGILE: handle with care THIS SIDE UP shows orientation of the unit. PROTECT AGAINST MOISTURE: the packaged unit must be stored in a dry place. TEMPERATURE…

RECEIVING AND STORING THE UNIT

Every unit leaves the factory in perfect condition. Therefore please check the unit very carefully on delivery and notify the transport company immediately and in writing of any damage. Check that the load capacity of the floor is sufficient to support the weight of the unit. The unit must be…

POSITIONING THE UNIT – WORKING SPACE

This unit is designed and built for outdoor installation with free airflow to the condenser coils. The unit can be installed in a semi-closed position if the ventilation system is efficient enough to maintain temperatures below the values given in the section on Function Limits. The fan intake…

HYDRAULIC CONNECTIONS

(see also the enclosed installation drawings and hydraulic diagram) 1) CHECK that the section of the chilled water pipes and the power of the circulation pump fitted are sufficient. An inadequate water flow significantly reduces the cooling capacity of the unit. 2) CHECK the water intake/output…

LOW-TEMPERATURE OPERATION WITH ANTIFREEZE MIXTURE

In the cooling phase, standard units can be operated with a water output temperature of 5°C. It is possible to cool fluids down to a temperature of -10°C as long as the chilled water contains enough anti-freeze liquid to prevent freezing inside the evaporator and by using special low-temperature…

GUIDE TO THE SIZING OF THE EXPANSION TANK

As a consequence of the variation in temperature of the water between intake and output, the volume occupied by the water changes, this change increasing with increase in the temperature variation. The buffer tank on the hydraulic circuit compensates for this change in volume. If this buffer tank…

ELECTRICAL CONNECTIONS

(See also the electrical diagram enclosed with the unit) Before doing any work on electrical components make sure that the power supply is disconnected. Correct and accurate electrical connections which comply with applicable safety regulations are vital for preventing injuries and for correct…

To switch the unit on and off or to change heat pump function between cooling and heating from a remote switch:: 5) CONNECT the remote ON/OFF switch to terminals 10 and 50 on the electrical panel; 6) CONNECT the remote SUMMER/WINTER selector to terminals 10 and 51. For remote alarm signalling…

REMOTE CONTROL, LOCAL NETWORKS AND SUPERVISION SYSTEMS

REMOTE CONTROL It is possible to use remote switches to turn the unit on and off and change function from cooling to heating, as shown on the unit’s electrical diagram and in the section START-UP AND TESTING CHECK LIST. The microprocessor control panel can also be remote: • (units with the mP20…

CONNECTION TO A SUPERVISION SYSTEM

(units with mP20 control only) With the addition of a serial circuit, the microprocessor control enables chiller function to be controlled by a centralised supervision system. For the connection of the control to the supervision systems, an optional serial board enables opto-isolated interface with…

(Units with basic control – not supplied with free cooling versions) The control panel enable data exchange with a supervision system via RS485 serial connection. The optional connection cable must be ordered to be attached to the SERIAL socket on the I/O board. FITTING THE OPTIONAL RS485 BOARD pin…

CHECK LIST FOR START-UP AND TESTING

After installation and before start-up the following points should be checked. In the event of problems, consult the troubleshooting section in this manual or contact the technical assistance staff at UNIFLAIR 1) CLOSE the general switch and arm the automatic switches IM1, IM2, e IM8; 2) SELECT…

6a)

SWITCHING ON THE CONTROL (Units with mP20 control only) Connect the power supply to the auxiliary circuit of the unit electrical panel (IM8); the control is activated as follows: - the yellow power LED on the circuit board switches on (see Layout of circuit board); - there is a short acoustic…

PROGRAMMING AND REGULATION

MICROPROCESSOR CONTROL INTRODUCTION The control system consists of a microprocessor base circuit fitted in the unit and a user interface which can be either local or remote. Sophisticated algorithms enable monitoring and protection of unit components and the user interface provides clear information…

mP20 ADVANCED CONTROL

This type of control, fitted where higher levels of sophistication are required, is intended for technological applications and enables independent control of all compressors. The control system regulation program, contained in the EPROM on the base circuit, is identified by an alphanumeric code…

REGULATION OF COOLING CAPACITY

The unit’s cooling capacity is regulated by activating the various cooling capacity steps, depending on the temperature measured by intake water sensor T1. T1 CHILLER INTAKE EXPANSION TANK T2 CHILLER OUTPUT RESERVOIR TANK PLATE EXCHANGER Refrigerant circuit diagram. Sensor T2 on the chiller output…

SETTING THE SAFETY DEVICES

The function parameter values set on the microprocessor control are given in the enclosed instruction manual. The table below gives the settings of the safety devices; these are also on the data plate on the unit. Component Refrigerant circuit (R22 – R407C) High pressure pressostat (AP1-AP2) 1 Low…

TECHNICAL DATA

(Free cooling version)

(Ultra-Low noise Free cooling versions)

DIMENSIONS AND WEIGHTS

AQUAFLAIR chillers are developed in three side groups, with a fixed height and depth and variable width. The weight of the unit is variable in accordance to the configuration of the pump group, the reservoir tank and other internal accessories. SIDE GROUPS CLASSI DIMENSIONALI CLASSI ARA SIDE GROUPS…

ARA Versione base (“solo freddo”)

ARA Basic version (“cooling only”) BASIC VERSION TECHNICAL DATA DATI TECNICI MODELLO ARA Alimentazione 00182 00202 00232 V/ph/Hz MODEL 400 / 3 / 50 Power supply R22 Refrigerant Refrigerante Potenzialità frigorifera nomin. (1) kW 44.1 51.6 59.5 Nominal cooling capacity (1) Potenza el. assorbita…

ARA Versione base (“solo freddo”)

ARA Basic version (“cooling only”) BASIC VERSION TECHNICAL DATA DATI TECNICI MODELLO ARA Alimentazione 00252 00302 00403 00504 V/ph/Hz MODEL 400 / 3 / 50 Power supply R22 Refrigerant Refrigerante Potenzialità frigorifera nomin. (1) kW 69.7 77.9 88.2 98.4 Nominal cooling capacity (1) Potenza el.…

ARA Versione free cooling

DATI TECNICI MODELLO ARA with free cooling function FREE COOLING Alimentazione TECHNICAL DATA ARA 00152 00182 00202 00232 V/ph/Hz MODEL 400 / 3 / 50 Power supply R22 Refrigerant Refrigerante Potenza resa in free cooling (1) kW - 28.1 29.3 36.1 Nom. cooling capacity (free cooling) (1) Potenzialità…

ARA Versione free cooling

DATI TECNICI MODELLO ARA with free cooling function FREE COOLING Alimentazione TECHNICAL DATA ARA 00252 00302 V/ph/Hz MODEL 400 / 3 / 50 Power supply R22 Refrigerant Refrigerante Potenza resa in free cooling kW 37.8 38.3 Nominal cooling capacity (free cooling) Potenzialità frigorifera nomin. in…

PROBLEM SOLVING

GUIDE TO PROBLEM SOLVING PROBLEM POSSIBLE CAUSE CHECK/CORRECTIVE ACTION THE CHILLER DOES NOT WORK The electrical panel has no power Check for mains power supply Check that the main switch is closed The microprocessor control circuit Check that the IM8 automatic board has no power supply auxiliary…

PROBLEM

HIGH OUTPUT PRESSURE OR INTERVENTION OF HIGH PRESSURE PRESSOSTAT POSSIBLE CAUSE High intake pressure LOW OUTPUT PRESSURE OR INTERVENTION OF LOW PRESSURE PRESSOSTAT The thermostatic valve is not set or Check that the superheating of the defective thermostatic valve is correct (approx. 5°C) Check that…

PROBLEM

THE COMPRESSOR DOES NOT WORK WHEN CALLED BY THE THERMOSTAT POSSIBLE CAUSE CHECK/CORRECTIVE ACTION One of the unit’s safety devices Check for alarms on the user has intervened terminal display Short circuit protection has Check the cause of the short circuit intervened and change the fuses The LP…

BLEEDING THE WATER CIRCUIT

If there is air in the water circuit it can be bled using the valves: - on the chilled water intake connection - on the optional reservoir tank During the winter shutdown (cooling-only versions) or for special maintenance, it may be necessary to drain the water circuit. To enable this there are…

data plate and verify that liquid supercooling at the thermostatic intake is 3 to 5°C less than the condensation temperature on the manometer scale and that the superheating is between 4 and 7°C NOTE: when charging with R407C check the liquid supercooling value (3 to 5°C) and not the sight glass.…

MAINTENANCE AND CLEANING

All maintenance and cleaning operations must be carried out safely, following the instructions in this manual. To ensure the correct functioning of the unit it is advisable to check regularly that the heat exchanger coils, the metal filters and the protection grilles are clean. IMPORTANT WARNING…

Via dell’industria, 10

35020 BRUGINE (Padova) - Italy Tel. +39 (0)49 9713211 Fax +39 (0)49 5806906 Internet: www.UNIFLAIR.com E-mail: INFO@UNIFLAIR.com 48 Manual code @ digit: 06MM001 @ 00B0140 UNIFLAIR ITALIA S.r.l.

Инструкция на Чиллеры серии ARA

Текст инструкции

Новое в каталогах

Новое в инструкциях