Инструкция на Кондиционеры серии С линии TechLine бренда Tecnair

INSTALLATION, USE AND MAINTENANCE

MANUAL SCOPE OF THIS MANUAL: DIRECT EXPANSION AND CHILLED WATER AIR CONDITIONERS SERIES C www.tecnairlv.it info@tecnairlv.it TECNAIR LV S.p.A Via Caduti della Liberazione 53 21040 UBOLDO (VA) Tel. +39029699111 / Fax +390296781570 Manual code 75803707A.0708

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CONTENTS

1 HOW TO USE THIS MANUAL 5 1.1 5 IMPORTANT WARNINGS 2 WARRANTY 6 3 DESCRIPTION OF THE UNIT 7 3.1 3.2 4 UNIT CODE 3.1.1 O / OVER (UPFLOW DISCHARGE) 3.1.2 U / UNDER (DOWNFLOW DISCHARGE) OPERATING LIMITS INSTALLATION PROCEDURE 10 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 TRANSPORTATION RECEIVING THE MACHINES ON…

7.2 7.3 8.1 8.2 FANS WITH 5-SPEED AUTO-TRANSFORMER FANS WITH 0-10 V MODULATING CONTROL (pCO) 8.2.1 CONSTANT FLOW RATE CONTROL 8.2.2 CONTROL WITH CONSTANT PRESSURE IN THE UNDERFLOOR OR SUPPLY DUCT 8.2.3 CONTROL OF AIR FLOW RATE ACCORDING TO COOLING CAPACITY 42 43 FREE COOLING AND TWIN SOURCES (pCO)…

HOW TO USE THIS MANUAL This manual describes the procedures for the installation, use and maintenance of series C air conditioning units. The following chapters contain information essential for obtaining the best performance from the unit you have purchased; TECNAIR LV therefore recommends that you…

WARRANTY TECNAIR LV air conditioners are subject to the following warranty conditions which are automatically deemed to have been understood and accepted by the customer at the time of placing the order. TECNAIR LV guarantees that the products supplied are well made and of good quality. It…

DESCRIPTION OF THE UNIT The machine in question is an air conditioner with direct expansion or chilled water coil designed for use in computer centres. The cabinet consists of hot-galvanised sheet panels in a frame constructed of painted aluminium section; the panels are made from hot-galvanised…

O / OVER (UPFLOW DISCHARGE) 3.1.2 U / UNDER (DOWNFLOW DISCHARGE) Manual code 75803707A.0708 Page 8 of 64

OPERATING LIMITS SERIES C AIR CONDITIONING UNIT UNIT TYPE DIRECT EXPANSION CHILLED WATER CHARACTERISTICS L H - MAXIMUM TEMPERATURE 30°C 30°C 30°C 21°C 19°C 20°C 50% 50% 50% 20% 20% 20% MINIMUM TEMPERATURE MAXIMUM HUMIDITY MINIMUM HUMIDITY STORAGE CONDITIONS Temperatures from-20°C to + 50°C…

INSTALLATION PROCEDURE 4.1 TRANSPORTATION Unless otherwise agreed with the Customer, TECNAIR LV shall supply their machines ex works with standard packaging consisting of: wooden pallet (1), protective polystyrene packing (2,3) and polythene sheet (4). During transportation the machines must not be…

RECEIVING THE MACHINES ON SITE For unloading of the units, please observe the procedures indicated in the illustrations reproduced below, which are also affixed to the original packaging of the unit. If the unit is not to be installed immediately after its arrival on site, it should remain in its…

POSITIONING THE UNIT AND INSTALLATION CLEARANCES To avoid any problems and damage to the air conditioners during transportation, we recommend that the units should only be removed from their packaging when they have reached their final destination. It also essential to make sure that the floor on…

PLENUMS AND PLINTHS Various type of air distribution plenum and plinth are available as accessories for both the Under (U) and Over (O) versions of the unit. The various options are listed in the table below: Front view Right - Left side view Front view Top view Plenum with front grille only or both…

INSTALLATION OF PLENUMS AND DUCT SECTIONS The plenums and duct sections at the top of the unit are to be installed using the four brackets supplied, which are to be fitted to the upper frame members of the unit. Fixing bracket To install the brackets proceed as follows: 4.4.2 1) Fix the brackets to…

CEA AIR-COOLED CONDENSERS CEA air-cooled condensers must be installed in accordance with the following instructions: HORIZONTAL INSTALLATION SINGLE ROW 1) 2) 3) 4) Remove the condenser from the packaging. Fit the fixing brackets (2) to the condenser (1). Position the condenser horizontally (4)on a…

Clearances for horizontal installation

Clearances for vertical installation Manual code 75803707A.0708 Page 16 of 64

WATER CONNECTIONS WARNING! TECNAIR LV tests water components with dried compressed air at 24 Bar. This ensures that no water is present in the water circuits thereby preventing the possibility of freezing during storage prior to installation. However, during the positioning and installation…

WATER-COOLED CONDENSERS On machines with integral water-cooled condensers, it will be necessary to install the supply and discharge lines to the condenser. The diameters of the pipes and the inlet and the outlet unions are indicated in the order confirmation. To ensure that circuit pipes are…

WATER COILS It will be necessary to install inlet and outlet pipes on both machines with chilled water coils and those with hot water coils. The diameters of the pipes and the inlet and the outlet unions are indicated in the order confirmation. The water inlet and outlet unions are indicated in the…

INTERNAL IMMERSED ELECTRODE HUMIDIFIER During installation of the unit it is necessary to connect a supply pipe (as shown in the figure) with the system characteristics indicated below. The discharge pipe is supplied ready-installed by Tecnair LB. The water connection should satisfy the following…

REFRIGERANT CIRCUIT CONNECTIONS The pipes must be made from Gelidus type copper, soft annealed for pipes with diameters 26 - 28, and hard drawn for larger diameter pipes. To prevent copper dust or swarf from getting into the system, the pipes should be cut using a pipe cutter rather than a hacksaw.…

SOLENOID VALVE ON THE LIQUID LINE The scroll compressors installed on TECNAIR LV air conditioners will not be damaged by the presence of any liquid refrigerant in the crankcase. However, when the refrigeration circuit is shutdown in the summer season, i.e. when the external temperature is just a few…

VERY LOW EXTERNAL TEMPERATURE KIT CEA air-cooled condensers, combined with Tecnair LV direct expansion air conditioners, are equipped as standard with air condensation pressure control via reduction of the air flow rate in accordance with the reduction in the condensation pressure. This system is…

ROUTING OF THE REFRIGERANT CIRCUIT PIPES Correct routing of the refrigerant circuit pipes is essential to the successful operation of the air conditioner. It is necessary to take special care in the selection and positioning of the compressor discharge and suction pipes, above all when these lines…

COMPLETION OF THE REFRIGERANT CHARGE • • • Direct expansion air conditioners are shipped pressurised with a nitrogen charge. Air-cooled condensers are shipped pressurised with a nitrogen charge. Machines with internal water-cooled condensers are supplied fully charged with refrigerant To charge the…

Air-cooled condensers with CEA axial fans

PRESSURE REGULATOR OF CEA CONDENSERS On completion of the installation of the condenser refrigerant connections, return the control panel to the vertical position to ensure a weatherproof seal, as shown in the figures below. The next tasks are to make the electrical connections and adjust the…

ELECTRICAL CONNECTIONS WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” The external electrical connections of the air conditioner must satisfy the following prescriptions: • They must be suitably dimensioned to withstand the maximum load in Amperes…

INSTALLATION OF THE REMOTE CONTROL INTERFACE If the complete terminal or reduced version is to be panel or recess mounted, the maximum thickness of the panel must be 6 mm; if the terminal is to recessed mounted in a wall, a masonry box with internal dimensions sufficient to accommodate the terminal…

INSTALLATION OF THE REMOTE CONTROL TERMINAL AT A DISTANCE OF OVER 50 M If the remote control terminal has to be installed at a distance of more than 50 m (up to a maximum of 200 m), two TCON6 boards must be used and connected together using a shielded AWG20/22 cable, as shown in the figure below.…

CHECKS AND FIRST STARTUP WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” Before the Manufacturer’s personnel proceed with the testing and startup of the machines, the checks listed in the following form must be carried out. DATE PLACE OPERATOR’S SIGNATURE…

Check that support brackets are installed on the discharge pipe every 3 m and are not too tight so as to allow expansion of the pipe. 10 Check that the refrigerant circuit valves are open, including the valve on the hot gas injection pipe. 11 Check the electrical connections to the condenser…

ELECTRICAL POWER SUPPLY CHECKS

DESCRIPTION 30 Check the connection of the three phases, neutral and earth. 31 Check that the power supply voltage and frequency are within the tolerance limits of +/- 10%. POSITIVE NEGATIVE CHECKS FOR AMBIENT SENSOR AND REMOTE TERMINAL CONNECTIONS (IF PRESENT) DESCRIPTION 32 Check positioning as…

DEACTIVATION, DISASSEMBLY AND SCRAPPING WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” TECNAIR LV air conditioners must only be dismantled by specialised technical personnel. In any case, the following points must be observed: • Switch off the air…

USE OF THE AIR CONDITIONING UNIT 7.1 TEMPERATURE CONTROL The heating and cooling devices are controlled in accordance with the temperature readings measured by the ambient sensor (or return air sensor) This temperature reading is compared with the set-point temperature, and the heating and cooling…

DIRECT EXPANSION AIR CONDITIONERS • AIR CONDITIONER WITH A SINGLE COMPRESSOR • AIR CONDITIONER WITH TWO COMPRESSORS 7.1.5 CHILLED WATER AIR CONDITIONER 7.1.6 HEATING WATER COILS Manual code 75803707A.0708 Page 37 of 64

COOLING CAPACITY CONTROL WITH HOT GAS INJECTION VALVE Control of cooling capacity is achieved through an electronic hot gas injection system. Injection of hot gas downstream of the thermostatic valve reduces cooling capacity in proportion to the request from the control system. With this system it…

SUPPLY AIR TEMPERATURE CONTROL (LIMIT) 7.2.1 µAC MICROPROCESSOR With the µAC microprocessor control it is possible to install a supply sensor (limit) for display of the supply temperature and control of the relative low supply temperature alarm. Below the set limit, the cold components will be…

HUMIDITY CONTROL Humidification control action is effected proportionally by way of the following components: • • Integrated immersed electrode humidifier External humidifier (not supplied by TECNAIR LV) Proportional control provides a modulating effect on the quantity of steam produced, which in…

CHILLED WATER AIR CONDITIONER 7.3.3 SIMULTANEOUS HUMIDIFICATION AND COOLING Cooling the air increases its relative humidity until it reaches saturation point. It is clear that the air’s capacity to absorb vapour depends on its relative humidity and falls to zero near saturation point. Attempting to…

VENTILATION 8.1 FANS WITH 5-SPEED AUTO-TRANSFORMER If it is expected that it will be necessary to vary the air flow rate during startup or use of the air conditioner, an auto-transformer may be installed to regulate the fan motor input voltage and thus the fan speed. The auto-transformer affords the…

CONTROL OF AIR FLOW RATE ACCORDING TO COOLING CAPACITY The pCO controls the fans so as to modulate the air flow rate in accordance with the cooling capacity requested by the system. This can make for significant energy savings and a reduction in noise levels, particularly when operating with partial…

FREE COOLING AND TWIN SOURCES (pCO) 9.1 WATER FREE COOLING The “Water Free Cooling” system installed on OCA…/FC - UCA…?/FC conditioners consists of an additional cold water coil, integrated in the machine’s finned evaporator coil pack, and a 3-way moudulating valve controlled by the microprocessor…

DIRECT EXPANSION TWIN SOURCES The “Direct Expansion Twin Sources” system installed on OCA…/TS - UCA…?/TS conditioners consists of an additional cold water coil, integrated in the machine’s finned evaporator coil pack, and a 3-way modulating valve controlled by the microprocessor control. With this…

WATER CHILLED TWIN SOURCES The “Water chilled Twin Sources” system installed on conditioners OCU…?/TS -? UCU…?/TS consists of an additional cold water coil, integrated in the machine’s finned evaporator coil pack, and a 3-way modulating valve controlled by the microprocessor control. In this…

LOCAL NETWORK 10.1 MASTER - SLAVE LOCAL NETWORK Provides increased operating security in rooms where this is necessary through the Master - Slave configuration. In this type of local network the units are all activated with the exception of one designated slave unit, which remains on standby. The…

ROUTINE AND MAJOR MAINTENANCE WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” 11.1 PROGRAMMED MAINTENANCE CHART The recommended unit maintenance programme is summarised in the following chart: FANS Check general condition: corrosion, mountings…

ELECTRICAL PANEL

Check the unit is receiving power correctly X Check the electrical connections X Check the power consumptions of electrical components X Test safety devices X X Renew protection fuses Check circuits for leaks X Bleed air from circuits X Check circuit temperatures and pressures X WATER CIRCUITS X…

MAINTENANCE OF THE FANS Fan maintenance operations must be carried out in conditions of maximum safety and always with the unit switched off During maintenance, check the following: 11.3 • Periodically check that the fan blades are clean and remove all dirt and encrusted deposits that could affect…

MAINTENANCE OF CEA AIR-COOLED CONDENSERS Air-cooled condensers require regular inspection of the evaporator coils, which should be cleaned if the cooling fins become clogged with dirt. It is also necessary to check the fan power draw as well as check for abnormal fan noise and the condition of the…

FAULT DIAGNOSIS WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” This chapter contains information to assist the operator in tracing any faults that may arise with the machine Starting from a description of the nature of the problem, we provide indications…

DIRECT EXPANSION AIR CONDITIONERS - REFRIGERATION CIRCUIT PROBLEMS LOW PRESSURE LOCK REFRIGERATION CIRCUIT NOT CHARGED THERMOSTAT VALVE FAULTY TRACE THE LEAK AND REPAIR REPLACE THE BELLOWS CLEAN THE AIR FILTERS LOW AIR FLOW THROUGH EVAPORATOR LACK OF COMPRESSION LOW CONDENSATIO N PRESSURE CHECK…

HIGH

PRESSURE LOCK AIR COOLED COND. AIR INLET TEMPERATURE TOO HIGH AIR FLOW TO CONDENSER TOO LOW CHECK COIL FOR POSSIBLE OBSTRUCTIONS WATER COOLED COND MEASURE AIR TEMPERATURE REFRIGERATION CIRCUIT OVERCHARGED FAN FAILS TO OPERATE ELIMINATE POSSIBLE RECIRCULATION OF EXPELLED AIR CHECK EFFICIENCY OF…

CHILLED WATER AIR CONDITIONER - WATER CIRCUIT PROBLEMS NO COOLING WATER TEMPERATURE AT EVAPORATOR OUTLET TOO HIGH AIR IN CIRCUIT CHECK AND BLEED AIR FROM CIRCUIT 3-WAY VALVE FAILS TO OPEN CHECK REFRIGERATION SYSTEM AND RETURN TEMPERATURE TO DESIGN CONDITIONS CHECK ELECTRONIC BOARD CHECK…

HEATING SECTION PROBLEMS NO HEATING POSTHEATING TO WATER CONDITIONS NO POST-HEATING NO SERVO CONTROL FUNCTIONS NO HOT GAS THERMAL MAGNETIC PROTECTION TRIPPED SAFETY THERMOSTAT TRIPPED SHORT CIRCUIT IN HEATER OR TO EARTH HIGH TEMPERATURE WITH REDUCED AIR FLOW CHECK POWER SUPPLY AND MODULATING SIGNAL…

DEHUMIDIFICATION PROBLEMS NO DEHUMIDIFICATION DIRECT EXPANS. CHILLED WATER COMPRESSOR FAILS TO START HIGH AIR FLOW RATE CHECK ENABLE SIGNALS ON ELECTRONIC BOARD RETURN TO DESIGN CONDITIONS HIGH AIR FLOW RATE RETURN TO DESIGN CONDITIONS HIGH WATER TEMPERATURE VALVE FAILS TO OPEN CHECK POWER SUPPLY ON…

EXCESSIVE

DEHUMIDIFICATION AIR FLOW TOO LOW DIRECT EXPANSION CHILLED WATER EVAPORATION TEMPERATURE TOO LOW CHECK IF FAN IS BLOCKED CHECK OPERATION OF THERMOSTATIC VALVE CHECK REFRIGERATION CIRCUIT IS CHARGED Manual code 75803707A.0708 Page 58 of 64 WATER TEMPERATURE TOO LOW CHECK IF FAN THERMAL PROTECTION HAS…

VENTILATION PROBLEMS NO AIR FLOW THERMAL PROT. TRIPPED FOR CURRENT OVERLOAD FLOW CONTROL SWITCH STUCK NO AIR OPERATION WITH PANELS OPEN FILTERS DIRTY CLOSE THE PANELS CLEAN THE FILTERS LOW SUPPLY VOLTAGE TEST SUPPLY VOLTAGE MECHANICAL FAILURE HIGH AIR FLOW REDUCE SPEED BY MODIFYING THE ELECTRICAL…

GLOSSARY • Proportional band: defines a temperature range of just a few degrees starting from the setpoint, within which the system operates the control devices. • Default: this term is used to describe the values (e.g. set-point and proportional band values) that will be automatically applied by…

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