TechLine TECNAIR LV C Series Manual de usuario

www.tecnairlv.it

[email protected]

TECNAIR LV S.p.A

Via Caduti della Liberazione 53

21040 UBOLDO (VA)

Tel. +39029699111 / Fax +390296781570

Manual code 75803707A.0708

INSTALLATION, USE AND MAINTENANCE

MANUAL

SCOPE OF THIS MANUAL:

DIRECT EXPANSION AND CHILLED WATER

AIR CONDITIONERS

SERIES C

Библиотека СОК 

Manual code 75803707A.0708

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Manual code 75803707A.0708

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CONTENTS

1HOW TO USE THIS MANUAL 5

1.1 IMPORTANT WARNINGS 5

2WARRANTY 6

3DESCRIPTION OF THE UNIT 7

3.1 UNIT CODE 7

3.1.1 O / OVER (UPFLOW DISCHARGE) 8

3.1.2 U / UNDER (DOWNFLOW DISCHARGE) 8

3.2 OPERATING LIMITS 9

4INSTALLATION PROCEDURE 10

4.1 TRANSPORTATION 10

4.2 RECEIVING THE MACHINES ON SITE 11

4.3 POSITIONING THE UNIT AND INSTALLATION CLEARANCES 12

4.4 PLENUMS AND PLINTHS 13

4.4.1 INSTALLATION OF PLENUMS AND DUCT SECTIONS 14

4.4.2 INSTALLATION OF THE ADJUSTABLE PLINTHS 14

4.5 CEA AIR-COOLED CONDENSERS 15

4.6 WATER CONNECTIONS 17

4.6.1 CONDENSATE DRAIN AND SIPHONS 17

4.6.2 WATER-COOLED CONDENSERS 18

4.6.3 PRESSURE CONTROLLED VALVE 18

4.6.4 WATER COILS 19

4.6.5 INTERNAL IMMERSED ELECTRODE HUMIDIFIER 20

4.7 REFRIGERANT CIRCUIT CONNECTIONS 21

4.7.1 DISCHARGE OR HOT GAS LINE 21

4.7.2 LIQUID OR RETURN LINE 21

4.7.3 NON-RETURN VALVES ON DISCHARGE AND RETURN LINES 21

4.7.4 SOLENOID VALVE ON THE LIQUID LINE 22

4.7.5 VERY LOW EXTERNAL TEMPERATURE KIT 23

4.7.6 ROUTING OF THE REFRIGERANT CIRCUIT PIPES 24

4.7.7 DIAMETERS OF REFRIGERANT CIRCUIT CONNECTION PIPES 25

4.7.8 COMPLETION OF THE REFRIGERANT CHARGE 26

4.7.9 PRESSURE REGULATOR OF CEA CONDENSERS 28

4.8 ELECTRICAL CONNECTIONS 29

4.8.1 INSTALLATION OF THE REMOTE CONTROL INTERFACE 30

4.8.2 INSTALLATION OF THE REMOTE CONTROL TERMINAL AT A DISTANCE OF

OVER 50 M 31

5CHECKS AND FIRST STARTUP 32

6DEACTIVATION, DISASSEMBLY AND SCRAPPING 35

7USE OF THE AIR CONDITIONING UNIT 36

7.1 TEMPERATURE CONTROL 36

7.1.1 PROPORTIONAL CONTROL 36

7.1.2 PROPORTIONAL + INTEGRAL CONTROL 36

7.1.3 PROPORTIONAL + INTEGRAL + DERIVATIVE CONTROL 36

7.1.4 DIRECT EXPANSION AIR CONDITIONERS 37

7.1.5 CHILLED WATER AIR CONDITIONER 37

7.1.6 HEATING WATER COILS 37

7.1.7 COOLING CAPACITY CONTROL WITH HOT GAS INJECTION VALVE 38

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7.1.8 COOLING CAPACITY CONTROL WITH HOT GAS INJECTION VALVE AND

ELECTRONIC EXPANSION VALVE 38

7.2 SUPPLY AIR TEMPERATURE CONTROL (LIMIT) 39

7.2.1 µAC MICROPROCESSOR 39

7.2.2 pCO MICROPROCESSOR CONTROL 39

7.3 HUMIDITY CONTROL 40

7.3.1 DIRECT EXPANSION AIR CONDITIONERS 40

7.3.2 CHILLED WATER AIR CONDITIONER 41

7.3.3 SIMULTANEOUS HUMIDIFICATION AND COOLING 41

7.3.4 DEHUMIDIFICATION LOCK 41

8VENTILATION 42

8.1 FANS WITH 5-SPEED AUTO-TRANSFORMER 42

8.2 FANS WITH 0-10 V MODULATING CONTROL (pCO) 42

8.2.1 CONSTANT FLOW RATE CONTROL 42

8.2.2 CONTROL WITH CONSTANT PRESSURE IN THE UNDERFLOOR OR SUPPLY

DUCT 42

8.2.3 CONTROL OF AIR FLOW RATE ACCORDING TO COOLING CAPACITY 43

9FREE COOLING AND TWIN SOURCES (pCO) 44

9.1 WATER FREE COOLING 44

9.1.1 FREE COOLING CONTROL 44

9.2 DIRECT EXPANSION TWIN SOURCES 45

9.2.1 DIRECT EXPANSION - WATER TWIN SOURCES(OCA…?/TS - UCA…/TS) 45

9.2.2 WATER - DIRECT EXPANSION TWIN SOURCES(OCA…/TS - UCA…/TS) 45

9.3 WATER CHILLED TWIN SOURCES 46

9.3.1 WATER - WATER TWIN SOURCES(OCU…/TS - UCU…/TS) 46

10 LOCAL NETWORK 47

10.1 MASTER - SLAVE LOCAL NETWORK 47

10.2 CASCADE LOCAL NETWORK(pCO) 47

10.3 CRITICAL SITUATIONS 47

10.4 EMERGENCY OPERATION 47

11 ROUTINE AND MAJOR MAINTENANCE 48

11.1 PROGRAMMED MAINTENANCE CHART 48

11.2 MAINTENANCE OF THE FANS 50

11.3 REFRIGERATION CIRCUIT CHECKS 50

11.4 MAINTENANCE OF THE ELECTRICAL BATTERY 50

11.5 MAINTENANCE OF THE ELECTRICAL PANEL 50

11.6 MAINTENANCE OF THE AIR FILTERS 50

11.7 MAINTENANCE OF CEA AIR-COOLED CONDENSERS 51

12 FAULT DIAGNOSIS 52

12.1 DIRECT EXPANSION AIR CONDITIONERS - REFRIGERATION CIRCUIT PROBLEMS 53

12.2 CHILLED WATER AIR CONDITIONER - WATER CIRCUIT PROBLEMS 55

12.3 HEATING SECTION PROBLEMS 56

12.4 DEHUMIDIFICATION PROBLEMS 57

12.5 VENTILATION PROBLEMS 59

13 GLOSSARY 60

14 NOTES 61

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1 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 study this manual carefully.

Some of the topics covered in this manual refer to the functions of the microprocessor controls; TECNAIR LV

therefore advises your to read the MICROPROCESSOR CONTROL USER MANUAL, which is also supplied with the

unit, in order to gain a full understanding of the components and functions of your air conditioner.

If after reading this manual you are still experiencing difficulties or require any further clarification, please do not

hesitate to contact our after-sales service:

After-sales office

Tel. +39029699111 / Fax +390296781570

@: [email protected]

1.1 IMPORTANT WARNINGS

The equipment described in this manual has been constructed to operate without risk for the intended

purposes, provided that:

•The installation, connection, operation and maintenance of the appliance are carried out by qualified

personnel in accordance with the instructions contained in this manual.

•All the conditions prescribed in the user manual for the unit’s microprocessor control are observed.

Any other use or modification of the equipment,

unless expressly authorised by the manufacturer, is deemed improper.

Any injuries or damage sustained as a result of improper use shall be the sole responsibility of the user.

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2 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 undertakes during the

period of warranty specified herein to repair or to replace with new at its own discretion, in the shortest time possible,

those parts found to present recognised defects in materials, construction or workmanship that render them unfit for the

intended use, provided that these faults are not the result of negligence on the part of the purchaser, neglect or

inexperience of the user, normal wear and tear, damage caused by third parties, acts of God or other causes not arising

out of manufacturing defects. TECNAIR LV however shall not be liable to for compensation for direct or indirect damage

of any nature incurred for any reason.

Defective components will be replaced at the Uboldo manufacturing plant, and all transportation and

replacement costs shall be borne by the Purchaser.

The duration of the warranty is 2 (two) years from the date of consignment.

The warranty shall be rendered void automatically if the equipment is repaired or modified or in any way

completed (such as, for example, in the case of non-supply of an electrical panel or similar) or in the case of the

installation of non-original parts (parts not supplied by TECNAIR LV).

The above warranty conditions apply provided that the Purchaser has fulfilled all contractual obligations and in

particular those regarding payment.

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3 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 sheet steel covered in a PVC film, secured by quick-thread screws that can be

unscrewed using a special safety wrench. The structure incorporates a thermal and acoustic insulation system using self-

extinguishing materials (polyurethane foam) protected by plastic film.

The machine comprises the following sections:

•Ventilation section: consisting of one or more plug fans.

•Filter section: self-extinguishing non-regenerable filters; the machine includes provision for the use of

a differential pressure switch to allow display of clogged filter warning signal;

•Refrigeration circuit: comprising an expansion coil with copper pipes and aluminium cooling fins, a

scroll compressor fixed to the machine frame on rubber mountings, thermostatic expansion valve,

receiver-drier, plate-type condenser (accessory), low pressure switch (automatic reset) and high

pressure switch (manual reset), pressurisation nitrogen charge, antifreeze lubrication oil charge;

•Water circuit (Series U): with cooling expansion coil with copper pipes in aluminium cooling fins, 3-way

motorised valve with manual emergency control, water circuit with anti-condensation thermal

insulation;

•Electrical power and control panel.

3.1 UNIT CODE

The code contains the following information:

O C A 5 1 a H FC R407C

1 2 3 4 5 6 7 8 - 9 10

O Upflow air discharge

1 O

Air discharge type: U Downflow air discharge

2 C

Series for technology rooms

A Direct expansion coil with remote condenser

3 A

Cooling type: U Chilled water coil with remote cooling

4 5

Nominal size (nominal cooling capacity in TONS)

5 1

Number of cooling circuits or number of rows on chilled water coil

6 a

Series modification index

H High air flow rate

7 H

Air flow rate/cooling capacity ratio L Low air flow rate

8 FC

FREE COOLING unit type

9 TS

TWIN SOURCES unit type

10 R407C

Refrigerant type

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3.1.1 O / OVER (UPFLOW DISCHARGE)

3.1.2 U / UNDER (DOWNFLOW DISCHARGE)

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3.2 OPERATING LIMITS

SERIES C AIR CONDITIONING UNIT

UNIT TYPE DIRECT EXPANSION CHILLED WATER

CHARACTERISTICS L H -

MAXIMUM

TEMPERATURE 30°C 30°C 30°C

MINIMUM

TEMPERATURE 21°C 19°C 20°C

MAXIMUM

HUMIDITY 50% 50% 50%

MINIMUM HUMIDITY 20% 20% 20%

STORAGE

CONDITIONS Temperatures from-20°C to + 50°C

CONDENSERS AND DRY COOLER

UNIT TYPE AIR WATER

CHARACTERISTICS WITH VARIATOR

AND ELECT. PANEL

WITHOUT

VARIATOR

AND ELECT. PANEL

WITH PRESSURE

CONTROLLED

VALVE

WITHOUT

PRESSURE

CONTROLLED

VALVE

Up to 30°C: ∆T = 17°C

Up to 35°C: ∆T = 15°C

Up to 40°C: ∆T = 13°C

MAXIMUM

TEMPERATURE

Up to 46°C: ∆T = 10°C

45°C

MINIMUM

TEMPERATURE

IN air

T°

- 25°C -40°C

water

T°

7°C 25°C

WATER CIRCUITS

TYPE CHILLED WATER HOT WATER INTERNAL

HUMIDIFIER

WATER-COOLED

CONDENSER

MAXIMUM

PRESSURE 16 bar (1.6 Mbar) 16 bar (1.6 Mbar) 8 bar (0.8 Mbar) 16 bar (1.6 Mbar)

MINIMUM

PRESSURE - - 1 bar (0.1 Mbar) 1 bar (0.1 Mbar)

MAXIMUM ∆P AT

VALVE 1 bar (100 Kpa) 1 bar (100 Kpa) - -

MAXIMUM

TEMPERATURE - 85°C 40°C -

MINIMUM

TEMPERATURE 5°C - 1°C -

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4 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 laid on their sides or overturned but must remain in the vertical

position at all times otherwise their internal components could be damaged.

As the Carrier is always responsible for damage sustained by the goods during transport, before signing the

delivery note to accept the supply, check the integrity of the packaging and that there are no visible signs of damage to

the conditioner or the leakage of oil or refrigerant.

In the case of evident damage to the unit or if there is slightest doubt as to whether the conditioner has been

damaged during transport, it is necessary to express your reservations in writing to the Carrier, whilst also informing the

TECNASIR LV Sales Department.

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