Инструкции на Кондиционеры серии Н линии Liveline бренда Tecnair

INSTALLATION, USE AND MAINTENANCE

MANUAL SCOPE OF THIS MANUAL SERIES H DIRECT EXPANSION AND CHILLED WATER AIR CONDITIONERS www.tecnairlv.it info@tecnairlv.it TECNAIR LV S.p.A Via Caduti della Liberazione 53 21040 UBOLDO (VA) Tel. +39029699111 / Fax +390296781570 Manuale cod. 75803307C.0807 “VERSIONE ORIGINALE”

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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 UNIT CODE OPERATING LIMITS 7 8 INSTALLATION PROCEDURE 9 4.1 4.2 4.3 4.4 4.5 4.6 TRANSPORTATION RECEIVING THE MACHINES ON SITE POSITIONING THE UNIT AND CLEARANCES 4.3.1 SHOCK-ABSORBING FEET 4.3.2 RAIN…

7.3 HUMIDITY CONTROL 7.2.1 SERIES H DIRECT EXPANSION AIR CONDITIONERS 7.2.2 CHILLED WATER AIR CONDITIONER 7.2.3 SIMULTANEOUS HUMIDIFICATION AND COOLING 7.2.4 DEHUMIDIFICATION LOCK SPECIFIC FUNCTIONS OF THE CONTROL SOFTWARE 7.3.1 NIGHT-TIME STAND-BY 7.3.2 UPS CONNECTION 7.3.3 “H – HR” HEAT RECOVERY…

HOW TO USE THIS MANUAL This manual describes the procedures for the installation, use and maintenance of series H 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 for surgical rooms and medical environments. The H series is characterised by perfect air-tight sealing, TUV certified and meeting class “B" requirements of EN 1886. The cabinets are…

OPERATING LIMITS SERIES H AIR CONDITIONING UNITS UNIT TYPE CHARACTERISTICS MAXIMUM TEMPERATURE MINIMUM TEMPERATURE MAXIMUM HUMIDITY MINIMUM HUMIDITY DIRECT EXPANSION WITHOUT HEAT WITH HEAT RECOVERY RECOVERY L H +L H CHILLED WATER WITHOUT HEAT RECOVERY WITH HEAT RECOVERY 38°C 30°C 46°C 40°C 38°C 46°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 a wooden pallet and protective polythene sheet. During transportation the machines must not be laid on their sides or overturned…

POSITIONING THE UNIT AND 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 which the air…

SHOCK-ABSORBING FEET Before final positioning, install the shock absorbing feet supplied with the unit (accessory). The feet are to be fixed to the underside of the unit using the bolts provided, as shown in the drawing enclosed with the order confirmation. 4.3.2 RAIN CANOPY Outdoor units are…

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 drain lines to the condenser. The diameters of the pipes and the inlet and the outlet unions are indicated in the order confirmation. The water inlet unions on the plate-type…

WATER COILS For machines with chilled water coils, as for those with hot water coils, it will be necessary to install inlet and outlet pipes. The diameters of the pipes and the inlet and the outlet unions are specified in the order confirmation. The water inlet and outlet unions are indicated in the…

HEAT RECOVERY CIRCUIT TECNAIR LV does not fill the heat recovery circuit in the factory as the percentage of glycol to be added to the water will vary according to the installation site and the minimum winter temperature. It essential to use a water/glycol solution whenever there is the possibility…

INTERNAL ELECTRODE HUMIDIFIER During installation of the unit it is necessry to connect a supply pipe (as shown in the figure) with the system characteristics indicated below. The discharge pipe is supplied ready-installed by Tenciar LV. The following conditions for correct water connection should…

MAINS STEAM VALVE The steam distribution systems may be connected to boilers, steam heat exchangers or existing steam users. The steam supply pipe, perfectly drained, must be connected to the top of the unit, as shown in the drawing, so that there is downward gradient towards the humidifier. A…

REFRIGERANT CIRCUIT CONNECTIONS The pipes must be made from Gelidus type copper, soft annealed copper 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…

VERY LOW EXTERNAL TEMPERATURE KIT CEA air 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 very…

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…

DIAMETERS OF REFRIGERANT CIRCUIT CONNECTION PIPES Use the following table to determine the recommended diameters for the discharge, liquid and suction pipes in accordance with the machine size (given by the numerical sequence in the product code). The values in the columns for pipe lengths up to 30m…

Discharge pipe and liquid pipe

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 preseciptions: • 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 TEMPERATURE/HUMIDITY SENSOR SUPPLIED WITH THE UNIT There are two types of sensor supplied with the unit (accessories): 1) 2) Temperature sensor or temperature/humidity sensor for duct installation: • Temperature sensor for the supply air duct: To be installed inside the supply…

POSITIONING OF THE AMBIENT DIFFERENTIAL PRESSURE SWITCH The pressure switch can be positioned in various ways. The following figures show the typical types of installation. Wherever you decide to install the pressure switch, the following points are essential • Connect the pipe with the free end in…

CHECKS AND FIRST STARTUP WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” Before the Mnufacturer’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 the diameter of the liquid pipe conforms to requirements. 9 Check that support brackets are installed every 3 m. 10 Check that refrigerant circuit valves are open, including the valve on the hot gas injection pipe. 11 Check the electrical connections to the condenser disconnect switch. 12…

ELECTRICAL POWER SUPPLY CHECKS

DESCRIPTION 30 Check the connetion 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…

SERIES H 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 COOLING CAPACITY CONTROL WITH HOT GAS INJECTION VALVE Control of cooling capacity is achieved through an electronic hot gas injection…

COOLING CAPACITY CONTROL WITH HOT GAS INJECTION VALVE AND ELECTRONIC EXPANSION VALVE In cases where a 50% reduction in cooling capacity is not compatible with the requirement for perfect system control, installation of an electronic expansion valve in place of the standard thermostatic expansion…

HUMIDITY CONTROL Humidification control action is effected proportionally through the use 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…

CHILLED WATER AIR CONDITIONER 7.2.3 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…

SPECIFIC FUNCTIONS OF THE CONTROL SOFTWARE This chapter describes certain specific functions of the control software for the series H unit. For more detailed descriptions of the components and accessories involved in the processes, pleae refer to the installation manual supplied with the unit. 7.3.1…

“H – HR” HEAT RECOVERY SYSTEMS The heat recovery system is based on the exchange of heat between external air and the air returned from the conditioned room. The transfer of heat between the two coils (shown in figure within the red circle) occurs via a specific pump and an expansion valve that uses…

SUPPLY TEMPERATURE CONTROL (LIMIT) The control of high and low supply temeparure is effected by way of various types of control in accordance with system requirements. High temperature can be controlled in the following ways: • ALARM ONLY: after the time delay, an alarm is generated • STOP HOT: when…

STERILIZATION CYCLE This function, which can be activated from the relative menu, serves to disinfect the room, the air ducts and the unit itself through the introduction of a sterilizing gas such as Glutaraldeide. The operating cycle is comprised of three stages: 1) DISTRIBUTION OF THE STERILIZING…

ROUTINE AND MAJOR MAINTENANCE WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” 8.1 PROGRAMMED MAINTENANCE CHART The recommended unit maintenance programme is summarised in the following chart: FANS Check general condition: corrosion, mountings, cleanliness…

MAINS STEAM VALVE

ELECTRICAL PANEL Check the condition of the valve X Check that the valve opens and closes correctly X Check the condensate drain X Check the operating pressures X Check operation of the maximum humidistat X Check the unit is receiving power correctly X Check the electrical connections X Check the…

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: 8.3 • Periodically check that the fan blades are clean and remove all dirt and encrusted deposits that could affect…

MAINTENANCE OF THE AIR FILTERS On TECNAIR LV air conditioners, all air filters are equipped with differential pressure switches to monitor pressure loss caused by clogging. The microprocessor signals when the measured pressure difference exceeds the set value. To change the trip setting of a…

WASHING, CLEANING AND DISINFECTION WARNING! BEFORE CARRYING OUT ANY OPERATIONS ON THE UNIT, SET THE MAIN SWITCH TO POSITION “O” 9.1 WARNINGS 1) Before proceeding with any cleaning operations, it is essential to read the following information and make sure that you have fully understood it. 2) All…

CLEANING SYSTEMS As the air conditioners contain electrical components (electric motors, terminal blocks, sensors, etc.) that could be damaged by high pressure water jets or high temperatures, and a refriegeration system that must not be subjcted to high pressures, the use of steam or pressurised…

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…

MALFUNCTION OF THE FAN CONTROL INVERTER. The following table lists the fault codes, the causes and the remedies for problems regarding fan control inverters. CODE 1 FAULT Overcurrent POSSIBLE CAUSE REMEDY The inverter has detected that the current at the outlet terminals is too high (>4*IH) Check…

CODE

FAULT 24 Counter fault 25 Watchdog faulty POSSIBLE CAUSE The value displayed on the counter is incorrect. Malfunction Component fault 29 Thermistor fault The thermistor input on the optional board has detected an increase in the motor temperature. 34 Internal communication bus Environmental…

DIRECT EXPANSION AIR CONDITIONERS – REFRIGERATION CIRCUIT PROBLEMS LOW PRESSURE BLOCKAGE REFRIGERATING CIRCUIT DISCHARGED THERMOSTATIC VALVE FAULTY SEARCH FOR THE LEAK THEN RESTORE RENEW THE BELLOWS CLEAN THE AIR FILTERS LOW AIR FLOW IN THE EVAPORATOR NO COMPRESSION LOW CONDENSATION PRESSURE CHECK…

HIGH

PRESSURE BLOCKAGE AIR COND. AIR FLOW RATE TO THE CONDENSER TOO LOW CHECK FOR ANY OBSTRUCTIONS ON THE COIL WATER COND. AIR INLET TEMPERATURE TOO HIGH MEASURE THE AIR TEMPERATURE REFRIGERATING CIRCUIT CHARGED TOO MUCH FAN DOESN’T WORK ELIMINATE ANY RECIRCULATION OF THE DISCHARGED AIR CHECK EFFICIENCY…

CHILLED WATER AIR CONDITIONERS – WATER CIRCUIT PROBLEMS NO CHILLING AIR IN THE CIRCUIT CHECK AND DISCHARGE THE AIR IN THE CIRCUIT WATER TEMPERATURE TOO HIGH AT THE EVAPORATOR OUTLET THREE-WAY VALVE FAILS TO OPEN CHECK THE CHILLER AND BRING THE TEMPERATURE BACK TO DESIGN CONDITIONS CHECK THE…

HEATING SECTION PROBLEMS NO HEATING POST WITH HOT GAS WATER ELECTRICAL NO POST HEATING NO SERVOCONTROL OPERATION NO HEATING CIRCUIT BREAKER TRIPS SAFETY THERMOSTAT TRIPS CHECK SUPPLY AND MODULATING SIGNAL HEATING ELEMENT SHORTED OR TO GROUND HIGH TEMPERATURE DUE TO REDUCED AIR FLOW VALVE FAILS TO…

DEHUMIDIFICATION PROBLEMS NO DEHUMIDIFICATION DIRECT EXPANS. REFRIG. WATER COMPRESSOR FAILS TO START HIGH AIR FLOW RATE CHECK SIGNALS ON ELECTRONIC CARD BRING BACK TO DESIGN CONDITIONS HIGH AIR FLOW RATE BRING BACK TO DESIGN CONDITIONS HIGH WATER TEMPERATURE CHECK SUPPLY ON ELECTRONIC CARD VALVE…

EXCESSIVE

DEHUMIDIFICATION AIR FLOW RATE TOO LOW DIRECT EXPANSION REFRIGERATED WATER WATER TEMPERATURE TOO LOW EVAPORATION TEMPERATURE TOO LOW CHECK FOR JAMMED FAN CHECK THERMOSTATIC VALVE OPERATION CHECK WHETHER REFRIGERATING CIRCUIT IS DISCHARGED Manuale cod. 75803307C.0807 Page 54 of 60 CHECK FAN CIRCUIT…

VENTILATION PROBLEMS NO AIR FLOW THERMAL CIRCUIT BREAKER TRIPPED DUE TO HIGH DRAW FLOW SWITCH JAMMED NO AIR OPERATION WITH PANELS OPEN DIRTY FILTERS CLOSE THE PANELS CLEAN THE FILTERS LOW SUPPLY VOLTAGE MEASURE VOLTAGE IF CORRECT MECHANICAL BREAKAGE CHECK MECHANISM OPERATION AND SETTING HIGH AIR…

GLOSSARY • Dead band – neutral band: defines a very narrow temperature range between the set-point and the proportional band within which the control devices are not operated. • Default: this term is used to describe the values (e.g. set-point and proportional band values) that will be automatically…

NOTES Manuale cod. 75803307C.0807 Page 57 of 60

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