CLIMAVENETA Accurate AX, Accurate AW, Accurate AT, Accurate AF, Accurate AD Installation Manual - User Maintenance

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INSTALLATION MANUAL - USER AND MAINTENANCE

Precision air-conditioners

ACCURATE

AX Direct Expansion

Air Cooled

AW Direct Expansion

Water Cooled

AD Dual Fluid

Air Cooled

AT Dual Fluid

Water Cooled

AF Free Cooling

Water Cooled

frame 1: 07-10

frame 2: 15-18

frame 3: 20-26-29

frame 4: 39-30-40-50

frame 5: 55-60-70

frame 6: 80-90

English 05/09ACCURATE AX - AW - AD - AT - AF

INDEX

Documents 4

Direct expansion unit configuration 4

General characteristics 6

Air flows 10

Rating plate 11

Technical data 11

Hot water re-heating 16

Accessing the main components 17

Transport and handling 18

Dimensions and weight 19

Positioning the air-conditioner 23

Operating space 23

Operating limits 24

Optional base moulding 24

Air distribution, under units 25

Intake plenum, under versions 25

Motor-driven damper, over/under units 26

Front outlet plenum 26

Front outlet moulding 26

Optinal air filter 27

Optional Fresh air 27

Position and diameter of the water connections 28

Water connections 32

Connection to brazed plate condenser AW-AT-AF 32

Correction factors 32

Air condenser: suggested installation 36

Refrigerant connections 37

Oil separator 38

Volume 39

Condensate drain 40

Electrical connections 40

Minimum cross-sections of the power supply cables 41

Electrical specifications 41

Electrical connection of the outdoor air-cooled

condenser BRC and/or the outdoor dry cooler BDC 43

Fan speed regulator condensing control 43

Vaacum and charge 45

Operation and control 46

Centrifugal fans regulation (frame 1-2) 47

Tightening the drive belts 47

Instruments and alarms 48

Calibrating the control and safety devices 49

Calibrating the pressure control valve 50

Calibrating the air flow sensor 50

Calibrating the dirty filter sensor 50

Temperature and humidity probe 51

Servomotor and hot water valve 51

Electric heaters 56

Humidifier 56

Humidifier power supply 58

Humidifier and condensate drain 58

Condensate drain pump and humidifier drain pumpe

Maintenance 59

Dismantling 60

Troubleshooting 61

U I A

AIU

In some parts of this manual, the following symbols are used:

WARNING = for actions that require special care and suitable preparation

PROHIBITED = for actions that absolutely MUST NOT be performed

The following symbols are used in this publication and inside the unit:

User

Installer

Assistance

Important

Prohibition

Specialist personnel

(electrician)

Person with in-depth knowledge and experience such as to be able to recognise risks and avoid dangers that may derive from electricity (IEV 826-09-01).

DOCUMENTS

DOCUMENTS ENCLOSED WITH THE UNIT

Each unit is delivered complete with the following documents:

• Air-conditioner installation - user and maintenance manual;

• Instruction manual for the microprocessor controller;

• Wiring diagram;

• List of spare parts;

• CE declaration with list of European directives and standards that the unit is compliant with;

• Warranty conditions.

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DIRECT EXPANSION UNIT CONFIGURATION

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4 English 05/09 ACCURATE AX - AW - AD - AT - AF

AX Direct expansion - air cooled

AW Direct expansion - water cooled

Option 1 MODELS

AD Dual Fluid - air cooled

AT Dual Fluid - water cooled AF Free Cooling - water cooled

Option 2 AIR FLOW

O Over Flow U Under Flow

A Top (for UNDER units)

F Frontal (for OVER units)

Option 5 SUCTION

B Bottom (for OVER units) R Rear (for OVER units)

AX_AD_air cooled

AX_AD_air cooled+condensing control (fan speed reg. for BRC air condenser)

AX_AD_air cooled x Low Temperature version “LT”

Option 4 VERSIONS

AW_AT_AF_water cooled

AW_AT_AF_water cooled+condensing control (fan speed reg.for BDC dry cooled)

AW_AT_water cooled+condensing control (pressostatic valve)

07 7 kw 10 10 kw 15 15 kw 18 18 kw 20 20 kw 26 26 kw 29 29 kw

Options 3 CAPACITY 30 30 kw

39 39 kw 40 40 kw 50 50 kw 55 55 kw 60 60 kw 70 70 kw 80 80kw 90 90kw

C ESP STD 20 Pa (F1/F2) o STD 50 Pa (F3+F6)

P ESP 150 Pa - direct driven (F1/F2)

Option 7 ESP

X ESP 100 Pa - belt driven (F3+F6)

Z ESP 200/300 Pa - belt driven (F3+F6)

H ESP 300 Pa - direct driven (F1/F2)

E Changeable ESP EC INVERTER

J Costant air flow (EC INVERTER fan)

K Costant ESP (EC INVERTER fan)

Option 6

COMPRESSORS M 1 Compressor 1 Circuit

REF. CIRCUITS B 2 compressors 2 circuits

T 1 0 M 0 0 0 1 1 0 1 2 0 G

Description

Options

A X O 2 9 X A M C

Type

Capacity

Version

Suction

Compressors/Ref.circuit

ESP

Power Supply

Refrigerant Fluid

User Terminal

Thermostatic Valve

Re-Heating

Humidity

El. Boards

Sensors

Thermo/Acustic Insulat.

Dumpers

Drain Pump

Fresh air filters

Packaging

Language

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Option 8 POWER SUPPLY

T 400/3N/50 Hz M 230/1/50 Hz

1 Refrigerant R 407 C

Option 9 REFRIGERANT FLUID

3 Refrigerant R 410 A

Option 11 THERMOSTATIC VALVE

M Mechanical valve - STANDARD

E El. Expansion valve 0 Without 1 Electrical heaters

Option 12 RE-HEATING

2 Extra electrical heaters 3 Hot water coil 4 Hot water coil + Electrical heaters 5 Hot water coil + Extra electrical heaters

0 Without

Option 18 DRAIN PUMP 1 Drain Pump for cool water - STANDARD

2 Drain Pump for HOT water - (when himidifier is installed)

Option 10 USER TERMINAL

0 Semigraphic Display on boards - STANDARD 1 Without

0 Without A Clock card B Serial Card RS 485 C Serial Card RS 232 D Serial Card Ethernet/BACNET

Opzione 14 EL. BOARDS

E Serial Card LON GGSM H Serial Card RS 485 + Clock card

L Serial Card RS 232 + Clock card M Serial Card Ethernet/BACNET + Clock card N Serial Card LON + Clock card R GSM + Clock card

0 Without

1 Clogged Filter

2 Fire Detector

3 Smoke Detector

4 Fire + Smoke

5 Fire + Smoke + Water leakage detector

6 Water leakage detector

Option 15

SENSORS 7 Clogged Filter + Fire + Smoke

8 Clogged Filter + Water leakage detector

9 Clogged Filter + Smoke + Fire + Water leakage detector A Clogged Filter + Fire + Water leakage detector B Clogged Filter + Smoke + Water leakage detector C Clogged Filter + Smoke D Fire + Water leakage detector

E Smoke + Water leakage detector

F Clogged Filter + Fire

2G2

4G4

5F5

6 G2 + Fresh Air

7 G4 + Fresh Air

Option19 FRESH AIR FILTERS

8 F5 + Fresh Air

9F6 AF7 BF8 C F6 + Fresh Air D F7 + Fresh Air

E F8 + Fresh Air

0 Without

Option 17 DUMPERS

2 With On-Off motor. damp. + SPRING return

THERMO/ACUSTIC

0 CL 0 (A1 DIN 4102) Special

Option 16

INSULATION

1 CL 1 STD

2 With Compressors Caps + CL 0

3 With Compressors Caps + CL 1

0 Without

Option 13 HUMIDIFIER

1 Only probe to read the humidity valve

2 Humidifer

3 Dehumidification

4 Humidifer + Dehumidification

I Italian

F French

Option 21 LANGUAGE

D German

E Spanish G English R Russian

Option 20 PACKAGING

0 Nylon - STANDARD

1 Wooden crate

6 English 05/09 ACCURATE AX - AW - AD - AT - AF

GENERAL CHARACTERISTICS

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DESCRIPTION OF THE UNIT

Ductable precision air-conditioners with capacities from 7 to 88 kW for vertical installation, cooling only, with the possibility of electric or hot water post-heating, humidifier and dehumidifier option for the precision control of the temperature-humidity conditions. Ideal for air-conditioning technological environments, server rooms and data processing centres, and technological applications in general.

OUTDOOR CONDENSER.

The packaged precision air-conditioners operate with R407c refrigerant and are suitable for indoor installation. The units conform to the essential requisites established in EC directive 2006/42/CE. They are factory tested and on site installation is limited to the refrigerant and electrical connections.

STRUCTURE

Base made from painted galvanised RAL7035 steel plate; frame complete with service panels that allow the unit to operate correctly during maintenance operations. The cosmetic panelling, coated with an innovative double layer of plastic, is lined on the inside with special soundproofing material.

COMPRESSORS

HERMETIC SCROLL compressors, complete with thermal overload protection and Rotolock fittings (7.5 HP). Fitted on rubber vibration dampers and complete with oil charge.

FAN S

CENTRIFUGAL TYPE Dual intake centrifugal fans, directly coupled to electric motors with external impeller positioned in the centre of the fan and suspended on rubber vibration dampers. The fans have the blades curved forwards to ensure maximum efficiency and low noise. EC INVERTER TYPE Fans with single suction, BCF type ( Bacward curved fans), inverter brushless motor with electronic commutation to get extremely high performances in terms of low power consumption and high External static pressure available. Fan speed can be adjusted directly from the user terminal in order to modify air flow volume or ESP.

FILTER

Pleated filters, supported by a frame, with protective metal mesh, and regenerable polyester fibre filtering media treated with synthetic resins. G4 efficiency according to the CEN-EN 779 standard with average separation efficiency 90.1% (ASHRAE). The filter is flame retardant.

AIR HEAT EXCHANGER

Finned coil, large front surface, made from copper tubes expanded mechanically onto aluminium fins with a high heat exchange surface. Hydrophilic treatment to assist the drainage of condensate. The coil, installed upstream of the fans for perfect air distribution, is fitted with a stainless steel pan with hose to drain the condensate.

ELECTRICAL PANEL

Built and wired in compliance with the IEC 204-1/EN60204-1 standards, complete with contactor and overload protection for the compressors and fans, disconnecting switch with door interlock safety device.

CONTROL

The microprocessor, by managing the compressor activation times, controls the cooling capacity and the operating alarms, with the possibility of connection to supervisor systems.

AIR FLOW SENSOR

Activates an alarm in the event of insufficient air flow.

ELECTRIC POST-HEATING (versions R or T)

Finned aluminium heaters complete with safety thermostat to cut off power and activate an alarm in the event of overheating.

IMMERSED ELECTRODE HUMIDIFIER (versions H or T)

Modulating steam production and automatic control of the salt concentration in the boiler to allow the use of untreated water.

MICROPROCESSOR CONTROL SYSTEM

For the control of the ambient parameters and the management of the unit monitoring and control functions (compliant with EEC directive 89/336).

DIRECT EXPANSION MODELS

HERMETIC SCROLL COMPRESSOR with high energy efficiency and low noise level, and inbuilt thermal overload protection. REFRIGERANT CIRCUIT including:

- liquid receiver;

- dewatering filter and flow indicator;

- thermostatic expansion valve;

- external connections with cocks;

- low and high pressure switches (with manual reset). WATER CONDENSER (water-cooled models) with braze welded stainless steel plates.

AIR FLOW CONFIGURATION

O- OVER: air delivery versus top U- UNDER: air delivery versus bottom

VERSIONS

- A: AX_air cooled

- X: AX_air cooled + condensation control (fan speed reg. for BRC air condenser)

- L: AX_air cooled x Low Temperature version "LT"

- E: AW_water cooled

- F: AW_water cooled + condensation control (fan speed reg. for BDC dry coolers)

- H: AW_water cooled + condensation control (pressostatic valve)

AIR-COOLED DIRECT EXPANSION UNIT - VERSION AX

All models have a single refrigerant circuit, and in some cases two circuits. See the DIGIT on the previous page. The compressor pumps the hot refrigerant gas into the outdoor condenser. The liquid refrigerant then flows to a liquid receiver installed in the indoor unit, to ensure a constant flow of refrigerant to the thermostatic valve and subsequently the evaporator. Here the liquid refrigerant absorbs the heat from the environment and changes state, becoming a gas, then returning to the compressor: the cycle is then repeated. To ensure the correct discharge pressure of the refrigerant, we suggest to select a unit provided with fan speed control. Valves for isolating the refrigerant circuit are supplied as standard to assist the routine maintenance operations. The Scroll compressor is fitted with a non-return valve to prevent the migration of liquid from the outdoor condenser in the summer, and unwanted flows of refrigerant during start-up. A second non-return valve, on the liquid line to the outlet of the condenser, to be fitted by the installer, is recommended during operation in winter, to prevent the migration of the refrigerant charge from the liquid receiver to the outdoor condenser, with consequent low pressure alarms. The units are provided, as standard, with centrifugal fans.

Air-cooled condenser, outdoor installation

The indoor unit can be connected to different types of outdoor condensers, standard or low noise versions, with special treatments on the coils. For the corresponding information refer to the manual on outdoor air-cooled condensers.

Note 1: the outdoor units and condensers are supplied separately Note 2: the indoor unit is delivered charged with nitrogen at

near atmospheric pressure. The outdoor condenser, on the other hand, is supplied pressurised with dry air (around 3 bar.) Note 3: the customer is considered responsible for making the correct connections between the indoor and outdoor unit, as clearly indicated in the Installation manual, and for ensuring the gas and oil charges, where necessary.

WATER-COOLED DIRECT EXPANSION UNIT VERSION AW

All models have a single refrigerant circuit, and in some cases two circuits. See the DIGIT on the previous page. The compressor pumps the hot refrigerant gas into the indoor condenser made from braze welded steel plates. The liquid refrigerant then flows to a liquid receiver installed in the indoor unit, to ensure a constant flow of refrigerant to the thermostatic valve and subsequently the evaporator. Here the liquid refrigerant absorbs the heat from the environment and changes state, becoming a gas, then returning to the compressor: the cycle is then repeated. To ensure the correct discharge pressure of the refrigerant, we suggest to select a unit provided with pressostatci valve. Remember that circulation pump is NOT selected, nor provided from Climaveneta. The units are provided, as standard, with centrifugal fans.

Water condenser

The units are fitted with an internal braze welded steel plate heat exchanger. During installation, a pressure control valve should be fitted (available in the price list) to manage the condensing pressure. (See the User and Maintenance Manual) This circuit works with primary water or with a closed circuit connected to an external Dry Cooler or an evaporative tower. For “closed” circuits, the water should be mixed with antifreeze to prevent frost during the winter, with consequent damage to the systems: see the installation manual to calculate the required percentage of antifreeze fluid. The Dry Coolers are supplied as an accessory (see the price list), while the antifreeze fluid and fluid circulating pump are generally supplied by other companies. For “open” circuits, mechanical filters are required to protect against impurities and prevent the braze welded plate heat exchanger from blocking. To reduce energy consumption (pump), a valve should be fitted to close the circuit when the indoor unit is off.

Note 1: the water-cooled indoor units (AW) come with the refrigerant circuit completely charged and tested in the factory before being delivered.

English 05/09ACCURATE AX - AW - AD - AT - AF

AX - air cooled AW - water cooled

8 English 05/09 ACCURATE AX - AW - AD - AT - AF

FREECOOLING UNIT – VERSION AF

All models have a single refrigerant circuit, and in some cases two circuits. See the DIGIT on the previous page. Each refrigerant circuit includes the compressor and a pressurebalanced thermostatic valve (or electronic valve) to ensure stable superheat temperatures. A liquid indicator is fitted before the thermostatic valve to display the gas charge. A dewatering filter is installed on the liquid line to keep the circuit clean and free of dirt. The refrigerant circuit is also fitted with high and low pressure switches. The low pressure switch has automatic reset, while for safety reasons the high pressure switch has manual reset. Remember that circulation pump is NOT selected, nor provided from Climaveneta. The AF units are provided, as standard, with radial fans EC.

Condenser

Each unit is fitted with one (for single circuit units) or two (two circuit units) condensers made from braze welded stainless steel heat exchangers. Each condenser is fitted with an HP8 automatic valve to control the condensing phase. In addition, the condensers are oversized in order to limit pressure drop (and minimise the power input of the circulating pumps). The units generally work via closed circuits with dry coolers cooled by the outside air. To prevent the formation of frost, the fluid used inside the closed circuit should always contain a percentage of glycol, as indicated in this manual, based on the average minimum temperature reached in the place of installation in the coldest periods. The cooling fluid must be circulated by pumps (not supplied as standard). Suitably-sized dry coolers are available as options.

Water circuit

The unit is fitted with a 3-way modulating valve to control the flow of cooling fluid to the indoor exchanger on the freecooling units. The opening and closing signal is generated and completely managed by the electronic controller on the air-conditioner, so as to maintain the desired conditions and ensure maximum energy saving.

DUAL FLUID UNITS – VERSION AD (air-cooled) & AT (water-cooled)

All models have a single refrigerant circuit, and in some cases two circuits. See the DIGIT on the previous page. Each refrigerant circuit includes the compressor and a pressure-balanced thermostatic valve (or electronic valve) to ensure stable superheat temperatures. A liquid indicator is fitted before the thermostatic valve to display the gas charge. A dewatering filter is installed on the liquid line to keep the circuit clean and free of dirt. The refrigerant circuit is also fitted with high and low pressure switches. The low pressure switch has automatic reset, while for safety reasons the high pressure switch has manual reset. The AD and AT units are provided, as standard, with radial fans EC.

Version AD (air-cooled)

A non-return valve should be installed on the liquid line between the indoor unit and the outdoor unit by the installer. The units are supplied separately from the outdoor condenser and are pre-charged with nitrogen. The customer is responsible for the connection between the two indoor and outdoor units and for the emptying and charging operations. For these operations, follow the instructions provided in the installation manual.

Outdoor air-cooled condenser

The air-cooled condenser should be selected from the models available in the vast range provided by the manufacturer

Water circuit

The unit is fitted with a 3-way modulating valve to control the flow of cooling fluid to the indoor exchanger so as to maintain the desired conditions. In the DUAL FLUID units, the two circuits, direct expansion DX and chilled water CW, never work at the same time.The direct expansion circuit DX is used as backup to the chilled water circuit CW. Activation set points for the two circuits are available and are described in the User Terminal manual.

AF - water cooled AD - air cooled

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Version AT (water-cooled )

Condenser

Each unit is fitted with one (for single circuit units) or two (two circuit units) condensers made from braze welded stainless steel heat exchangers. In addition, the condensers are oversized in order to limit pressure drop (and minimise the power input of the circulating pumps). The units generally work via closed circuits with dry coolers cooled by the outside air. To prevent the formation of frost, the fluid used inside the closed circuit should always contain a percentage of glycol, as indicated in this manual, based on the average minimum temperature reached in the place of installation in the coldest periods. The cooling fluid must be circulated by pumps (not supplied as standard). Suitably-sized dry coolers are available as options.

Water circuit

The unit is fitted with a 3-way modulating valve to control the flow of cooling fluid to the indoor exchanger so as to maintain the desired conditions. In the DUAL FLUID units, the two circuits, direct expansion DX and chilled water CW, never work at the same time. The direct expansion circuit DX is used as backup to the chilled water circuit CW. Activation set points for the two circuits are available and are described in the User Terminal manual. Remember that circulation pump is NOT selected, nor provided from Climaveneta.

AT - water cooled

10 English 05/09 ACCURATE AX - AW - AD - AT - AF

AIR FLOWS

The ACCURATE air-conditioners are available in different con- figurations, based on the air intake and outlet positions; the main distinction is between OVER and UNDER units. The versions defined as OVER with air outlet from the top gen-

erally have the air intake at the front, rear and/or from the bottom, as required by the customer, and the air outlet from the top of the unit, in ducts, false-ceilings, or from outlet plenums at the front.

fig. 1

fig. 2

fig. 3

fig. 4

1 OVER units with intake from the front and outlet plenum 2 OVER units with intake from the front and outlet from the top

3 OVER units with intake from under the floor and outlet

from the top

4 OVER units with intake from the rear and outlet from the

top

5 UNDER units with intake from the top and front outlet

plenum.

6 UNDER units with intake from the top and outlet under

the floor

The versions defined as UNDER with air outlet from under the floor have the air intake through the top of the unit directly from the environment, or via ducts and/or intake plenums.

fig. 5

fig. 6

AXO - AWO - ADO - ATO - AFO

AXU - AWU - ADU - ATU - AFU

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The air-conditioner rating plate is positioned on a panel inside the unit, and provides the following information:

- Model and serial number of the unit;

- Power supply (voltage, phases and frequency);

- Power input of the unit and the individual components;

- Current input of the unit and the individual components: OA (Operating current), FLA (Full load current) and LRA (Locked rotor current);

- Settings of the pressure switches in the refrigerant circuit (HP and LP);

- Type of refrigerant (R407C/R410A);

- Charge or pre-charge in each refrigerant circuit (AW versions only)

RATING PLATE

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TECHNICAL DATA

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ACCURATE - AX air cooled Frame Model

Power supply V/Ph/Hz Refrigerant

COOLING CAPACITY

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR (1)

COMPRESSORS

Q.ty Power abs. kW N° circuits Refrigerant

COOLING CAPACITY

Total cooling capacity gross (2) kW Sensible cooling capacity gross (2) kW SHR (2)

COMPRESSORS

Q.ty Power abs. kW N° circuits

VENTILATION

Nominal air flow mc/h Power abs. - centrifugal fans Power abs. - radial fans Power abs. - centrifugal fans kW Power abs. - radial fans kW Pressure sound level (5) dB(A) Air filter

HUMIDIFIER

Capacity kg/h Power abs. kW

ELECTRICAL HEATER

Steps Power abs. kW

DIMENSIONS

Lmm Pmm Hmm Remote Condenser BRE (R410A) Remote Condenser BRC (R407C)

F1 F2 F3 F4 F5 F6

7 101518202629393040505560708090

400/3N/50 400/3N/50 400/3N/50 400/3N/50 400/3N/50 400/3N/50

R410A R410A R410A R410A R410A R410A

7,2 9,6 16,3 19,1 23,3 28,9 31,8 41 33,4 46,2 52,3 60,3 68,1 73,2 87,8 95,4 7,2 9,2 16,3 18,2 23,3 28,8 29,9 41 33,4 46,2 49,9 60,3 68,1 70,1 87,8 91,8

1,00 0,96 1,00 0,95 1,00 1,00 0,94 1,00 1,00 1,00 0,95 1,00 1,00 0,96 1,00 0,96

1111111122222222

1,69 2,20 3,64 4,31 4,93 6,00 6,93 7,86 7,26 9,85 12,02 12,02 13,86 15,69 17,70 21,34

1111111122222222

R407C R407C R407C R407C R407C R407C

7,9 10,1 16,1 19,3 23,7 29,0 31,7 42,5 34,0 46,9 53,4 62,3 69,7 74,2 86,5 96,7 7,9 9,4 16,1 18,2 23,5 28,8 29,8 42,5 34,0 46,3 50,3 62,3 68,7 70,5 86,5 92,3

1,00 0,93 1,00 0,94 0,99 0,99 0,94 1,00 1,00 0,99 0,94 1,00 0,99 0,95 1,00 0,95

1111111122222222

1,84 2,41 3,89 4,46 5,13 6,39 7,32 8,30 7,36 9,68 12,50 12,54 14,67 16,57 18,83 22,49

1111111122222222

2500 2500 4900 4900 6500 8000 8000 13500 10500 13500 13500 19000 19000 19000 25000 25000

11221112222222- -

1122111222233333 0,49 0,49 1,00 1,00 1,66 2,02 2,02 3,61 2,89 3,61 3,61 6,55 6,55 6,55 - 0,27 0,27 0,53 0,53 0,89 1,69 1,69 3,51 2,09 3,51 3,51 5,11 5,11 5,11 6,1 6,1

50 50 53 53 56 60 60 64 59 64 64 67 67 67 67 67

G2 G2 G4 G4 G4 G4

3355555555588888 2,25 2,25 3,75 3,75 3,75 3,75 3,75 3,75 3,75 3,75 3,75 66666

3333333333333333

4488999151515151818181818

600 1000 1000 1550 2100 2650 500 500 790 790 790 790

1980 1980 1980 1980 1980 1980 014m 014m 022m 027m 027m 044m 044m 051m 054b 054b 065b 065b 076b 100b 100b 116b 014m 014m 025m 025m 032m 032m 052m 052m 051b 051b 077b 077b 088b 093b 102b 120b

1 - Indoor air 24°C-50%, Condensing temp. 45°C - ESP 20Pa 2 - Indoor air 24°C-50%, Condensing temp. 48°C (dew point) - ESP 20Pa 5 - Measured at h=1,5 m height and 2 m front in free field

12 English 05/09 ACCURATE AX - AW - AD - AT - AF

* PAY ATTENTIONS: PIPELINE DIMENSIONS MUST BE CALCULATED FROM INSTALLED LOCALLY, FOLLOWING THE INSTRUCTION ON WATER CONNECTIONS PARAGRAPHS

1 - air 24°C-50%, water 30-35°C - ESP 20Pa 5 - Measured at h=1,5 m height and 2 m front in free field

ACCURATE - AW water cooled Frames Model

Power supply V/Ph/Hz Refrigerant

COOLING CAPACITY

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR (1) Water flow (1) l/h Water pressure drop (1) kPa

COMPRESSORS

Q.ty Power abs. (1) kW N° circuits Refrigerant

COOLING CAPACITY

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR (1) Water flow (1) l/h Water pressure drop (1) kPa

COMPRESSORS

Q.ty Power abs. (1) kW N° circuits

WATER CONDENSER PLATE

Type Q.ty Water connection* IN

OUT

Water volume l

VENTILATION

Nominal air flow mc/h N° centrifugal fans N° radial fans Power abs. - centrifugal fans kW Power abs. - radial fans kW Pressure sound level (5) dB(A) Air filter

HUMIDIFIER

Capacity kg/h Power abs. kW

ELECTRICAL HEATER

Steps Power abs. kW

DIMENSIONS

Lmm Pmm Hmm Dry Cooler BDC

F1 F2 F3 F4 F5 F6

7 101518202629393040505560708090

400/3N/50 400/3N/50 400/3N/50 400/3N/50 400/3N/50 400/3N/50

R410A R410A R410A R410A R410A R410A

7,5 9,8 16,9 19,8 24,5 29,2 33,0 43,0 34,8 48,5 54,5 62,6 70,8 77,4 90,6 99,3

7,5 9,3 16,9 18,3 23,8 28,3 29,9 43,0 34,8 48,4 49,9 62,6 69,1 71,1 90,0 92,8 1,00 0,95 1,00 0,92 0,97 0,97 0,91 1,00 1,00 1,00 0,92 1,00 0,98 0,92 0,99 0,93 1520 2050 3390 4020 4820 5930 6730 8360 3460x2 4780x2 5715x2 6155x2 6975x2 7705x2 17850 20160

8 14 5 7 233027302421303330263139

1111111122222222

1,47 1,91 3,26 3,93 4,28 5,38 6,24 6,91 6,42 8,53 10,76 10,77 12,38 13,54 15,90 19,15

1111111122222222

R407C R407C R407C R407C R407C R407C

7,9 10,3 16,3 19,5 23,9 29,4 32,5 44,6 34,3 47,7 54,8 65,0 72,2 77,2 90,1 100,5

7,9 9,4 16,3 18,2 23,5 28,5 30,3 44,6 34,3 47,6 50,9 65,0 69,7 71,6 89,8 93,8 1,00 0,91 1,00 0,93 0,98 0,97 0,93 1,00 1,00 1,00 0,93 1,00 0,97 0,93 1,00 0,93 1620 2190 3350 3980 4720 6090 6880 8680 3420x2 4690x2 5855x2 6385x2 7145x2 7930x2 18840 20520

10 17 6 7 22 34 31 35 24 20 32 35 32 31 31 40

1111111122222222

1,62 1,83 3,21 3,77 4,28 5,64 6,43 7,24 6,49 8,33 11,20 11,28 13,09 14,26 16,87 20,21

1111111122222222

Brazed Plate Condenser AISI316

1111111122222211 3/4" M 3/4" M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 2" M 2" M 3/4" M 3/4" M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 2" M 2" M

0,8 0,8 3,9 3,9 2,5 2,5 3,0 3,8 2x1,6 2x2,5 2x2,5 2x2,5 2x3 2x3,8 8,5 8,5

2500 2500 4900 4900 6500 8000 8000 13500 10500 13500 13500 19000 19000 19000 25000 25000

11221112222222- -

1122111222233333 0,49 0,49 1,00 1,00 1,66 2,02 2,02 3,61 2,89 3,61 3,61 6,55 6,55 6,55 - 0,27 0,27 0,53 0,53 0,89 1,69 1,69 3,51 2,09 3,51 3,51 5,11 5,11 5,11 6,1 6,1

50 50 53 53 56 60 60 64 59 64 64 67 67 67 67 67

G2 G2 G4 G4 G4 G4

3355555555588888 2,25 2,25 3,75 3,75 3,75 3,75 3,75 3,75 3,75 3,75 3,75 66666

3333333333333333

4488999151515151818181818

600 1000 1000 1550 2100 2650 500 500 790 790 790 790

1980 1980 1980 1980 1980 1980

013m 013m 030m 030m 030m 039m 039m 052m 039m 039m 062m 078m 078m 092m 103m 123m

English 05/09ACCURATE AX - AW - AD - AT - AF

* PAY ATTENTIONS: PIPELINE DIMENSIONS MUST BE CALCULATED FROM INSTALLED LOCALLY, FOLLOWING THE INSTRUCTION ON WATER CONNECTIONS PARAGRAPHS

1 - air 24°C-50%, water 30-35°C - ESP 20Pa 2 - water IN 10°C water flow as DX mode - ESP 20Pa 5 - Measured at h=1,5 m height and 2 m front in free field

ACCURATE - AF Free-cooling Frame Model

Power supply V/Ph/Hz Refrigerant

COOLING CAPACITY (DX)

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR

COMPRESSORS

Q.ty Power abs. kW N° circuits Condensing Water flow (1) l/h Water pressure drop in DX mode Refrigerant

COOLING CAPACITY (DX)

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR

COMPRESSORS

Q.ty Power abs. kW N° circuits Condensing Water flow (1) l/h Water pressure drop in DX mode kPa

COOLING CAPACITY (FREE-COOLING)

Total cooling capacity gross (2) kW Sensible cooling capacity gross (2) kW SHR Water pressure drop in FC mode kPa Water connection* IN

OUT

Water volume l

WATER CONDENSER PLATE

Type Q.ty

VENTILATION

Nominal air flow mc/h N° radial fans Power abs. - radial fans kW Pressure sound level (5) dB(A) Air filter

HUMIDIFIER

Capacity kg/h Power abs. kW

ELECTRICAL HEATER

Steps Power abs. kW

DIMENSIONS

Lmm Pmm Hmm Dry Cooler BDC

F3 F4 F5 F6

20 26 29 39 30 40 50 60 70 80 90

400/3N/50 400/3N/50 400/3N/50 400/3N/50

R410A R410A R410A R410A

24,9 30,6 32,3 47,3 38,1 50,0 54,5 70,3 76,6 91,8 101,9 22,8 28,3 30,0 46,9 36,7 47,9 50,7 66,8 71,1 88,2 92,2 0,92 0,92 0,93 0,99 0,96 0,96 0,93 0,95 0,93 0,96 0,90

11112222222

4,40 5,40 6,11 8,00 6,44 8,61 10,55 12,28 13,30 16,03 19,33

11112222222

4900 6330 7002 8430 7380 9810 11954 14360 16133 18120 20830

47 70 46 66 49 56 55 65 70 55 68

R407C R407C R407C R407C

24,2 31,3 32,5 45,9 37,6 49,0 54,7 71,7 77,6 92,8 101,0 22,6 28,6 30,2 45,9 36,5 47,5 50,8 67,3 71,3 88,5 91,9 0,93 0,91 0,93 1,00 0,97 0,97 0,93 0,94 0,92 0,95 0,91

11112222222

4,30 5,66 6,30 7,28 6,70 8,41 10,96 13,40 14,03 16,94 20,28

11112222222

4780 6190 7204 9650 7440 9610 12313 14740 16680 19160 21340

45 73 47 67 48 58 57 71 74 60 72

19,95 24,04 25,10 40,79 33,62 41,47 43,80 56,62 58,10 76,67 78,26 19,95 24,04 25,10 40,79 33,62 41,47 43,80 56,62 58,10 76,67 78,26

11111111111

60 97 69 89 64 84 95 85 91 80 99

1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 2" F 2" F 2" F 2" F

1 1/4 M 1 1/4 M 1 1/4 M 1 1/4 M 1 1/4 M 1 1/4 M 1 1/4 M 1 1/4 M 1 1/4 M 2" M 2" M

11,8 11,8 11,8 17,9 17 19,1 19,1 25,2 26,8 32,5 32,5

Brazed Plate Condenser AISI316

11112222211

6000 7500 8000 13000 10000 13000 13500 18000 19000 24000 24000

11122223333

0,89 1,60 1,80 3,40 2,09 3,40 3,65 4,50 5,20 6,1 6,1

56 60 60 64 59 64 64 67 67 67 67

G4 G4 G4 G4

55555558888

3,75 3,75 3,75 3,75 3,75 3,75 3,75 6666

33333333333 9 9 9 15 15 15 15 18 18 18 18

1000 1550 2100 2650

790 790 790 790

1980 1980 1980 1980

030m 039m 039m 052m 039m 052m 062m 078m 092m 103m 123m

14 English 05/09 ACCURATE AX - AW - AD - AT - AF

* PAY ATTENTIONS: PIPELINE DIMENSIONS MUST BE CALCULATED FROM INSTALLED LOCALLY, FOLLOWING THE INSTRUCTION ON WATER CONNECTIONS PARAGRAPHS

1 - 24°C-50%, 45°C - ESP 20Pa 2 - 24°C-50%, 48°C (dew point) - ESP 20Pa 4 - air 24°C-50%, water 7-12 °C - ESP 20Pa 5 - Measured at h=1,5 m height and 2 m front in free field

ACCURATE - AD Dual fluid air cooled Frame Model

Power supply V/Ph/Hz Refrigerant

COOLING CAPACITY (DX)

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR

COMPRESSORS

Q.ty Power abs. kW N° circuits Refrigerant

COOLING CAPACITY (DX)

Total cooling capacity gross (2) kW Sensible cooling capacity gross (2) kW SHR

COMPRESSORS

Q.ty Power abs. kW N° circuits

COOLING CAPACITY (CW)

Total cooling capacity gross (4) kW Sensible cooling capacity gross (4) kW SHR Water flow (4) l/h Total Water pressure drop (4) kPa Water connection CW IN

OUT

Water volume l

VENTILATION

Nominal air flow mc/h N° radial fans Power abs. - radial fans kW Pressure sound level (5) dB(A) Air filter

HUMIDIFIER

Capacity kg/h Power abs. kW

ELECTRICAL HEATER

Steps Power abs. kW

DIMENSIONS

Lmm Pmm Hmm Remote Condenser BRC

(R407C)

Remote Condenser

BRE (R410A)

F3 F4 F5 F6

20 26 29 39 30 40 50 60 70 80 90

400/3N/50 400/3N/50 400/3N/50 400/3N/50

R410A R410A R410A R410A

23,7 29,4 32,7 42,2 36,7 47,6 55,1 62,1 75,5 86,3 98,8 21,8 27,9 30,2 42,2 36,2 47,0 50,7 62,1 71,0 86,1 91,0 0,92 0,95 0,92 1,00 0,99 0,99 0,92 1,00 0,94 1,00 0,92

11112222222

4,93 6,01 6,75 7,87 7,15 9,87 11,70 12,02 15,40 17,68 21,38

11112222222

R407C R407C R407C R407C

23,2 30,1 32,9 43,8 36,2 46,7 55,3 64,2 77,5 90,8 99,9 22,2 28,1 30,3 43,8 36,0 46,6 50,9 64,2 71,8 87,9 91,4 0,96 0,93 0,92 1,00 0,99 1,00 0,92 1,00 0,93 0,97 0,91

11112222222

4,85 6,26 7,15 8,30 7,41 9,70 12,20 12,55 16,30 18,84 22,51

11112222222

23,8 28,1 29,5 50,0 41,0 50,0 51,4 65,0 67,6 91,0 91,0 21,8 26,4 27,6 46,3 37,0 46,3 47,5 62,2 64,5 85,0 85,0 0,92 0,94 0,94 0,93 0,90 0,93 0,92 0,96 0,95 0,93 0,93

3890 4590 4590 8170 6710 8170 8170 10630 10630 14870 14870

26 35 35 46 30 46 46 26 26 53 53

1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 2" F 2" F 2" F 2" F

1" F 1" F 1" F 1" F 1" F 1" F 1" F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F

9,3 9,3 9,3 14,1 14,1 14,1 14,1 19,2 19,2 24 24

6000 7500 8000 13000 10000 13000 13500 18000 19000 24000 24000

11122223333

0,89 1,60 1,80 3,40 2,09 3,40 3,65 4,50 5,20 6,1 6,1

56 60 60 64 59 64 64 67 67 67 67

G4 G4 G4 G4

55555558888

3,75 3,75 3,75 3,75 3,75 3,75 3,75 6666

33333333333 9 9 9 15 15 15 15 18 18 18 18

1000 1550 2100 2650

790 790 790 790

1980 1980 1980 1980 032m 032m 052m 052m 051b 051b 077b 088b 093b 102b 120b 027m 044m 044m 051m 054b 054b 065b 076b 100b 100b 116b

English 05/09ACCURATE AX - AW - AD - AT - AF

* PAY ATTENTIONS: PIPELINE DIMENSIONS MUST BE CALCULATED FROM INSTALLED LOCALLY, FOLLOWING THE INSTRUCTION ON WATER CONNECTIONS PARAGRAPHS

1 - air 24°C-50%, water 30-35°C - ESP 20Pa 2 - air 24°C-50%, water 15-30°C - ESP 20Pa 5 - Measured at h=1,5 m height and 2 m front in free field 6 - air 24°C-50%, water 7-12 °C - ESP 20Pa

ACCURATE - AT Dual fluid water cooled Frame Model

Power supply V/Ph/Hz Refrigerant

COOLING CAPACITY (DX)

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR (1) Condensing Water flow (1) l/h Water pressure drop (1) kPa

COMPRESSORS

Q.ty Power abs. (1) kW N° circuits Refrigerant

COOLING CAPACITY (DX)

Total cooling capacity gross (1) kW Sensible cooling capacity gross (1) kW SHR (1) Condensing Water flow (1) l/h Water pressure drop (1) kPa

COMPRESSORS

Q.ty Power abs. (1) kW N° circuits

COOLING CAPACITY (CW)

Total cooling capacity gross (6) kW Sensible cooling capacity gross (6) kW SHR Water flow (6) l/h Total Water pressure drop (6) kPa Water connection CW IN

OUT

Water volume l

WATER CONDENSER PLATE

Type Q.ty Water connection. IN

OUT

Water volume l

VENTILATION

Nominal air flow mc/h N° radial fans Power abs. - radial fans kW Pressure sound level (5) dB(A) Air filter

HUMIDIFIER

Capacity kg/h Power abs. kW

ELECTRICAL HEATER

Steps Power abs. kW

DIMENSIONS

Lmm Pmm Hmm Dry Cooler BDC

F3 F4 F5 F6

20 26 29 39 30 40 50 60 70 80 90

400/3N/50 400/3N/50 400/3N/50 400/3N/50

R410A R410A R410A R410A

24,9 30,6 32,3 47,3 38,1 50,0 54,5 70,3 76,6 91,8 101,9 22,8 28,3 30,0 46,9 36,7 47,9 50,7 66,8 71,1 88,2 92,2 0,92 0,92 0,93 0,99 0,96 0,96 0,93 0,95 0,93 0,96 0,90

4900 6330 7002 8430 3690 x 2 4905 x 2 5977x2 7180x2 8066x2 18120 20830

24 32 28 31 27 21 32 30 28 33 41

11112222222

4,30 5,40 6,11 6,94 6,44 8,61 10,55 12,28 13,30 16,03 19,33

11112222222

R407C R407C R407C R407C

24,2 31,3 32,5 45,9 37,6 49,0 54,7 71,7 77,6 92,8 101,0 22,6 28,6 30,2 45,9 36,5 47,5 50,8 67,3 71,3 88,5 91,9 0,93 0,91 0,93 1,00 0,97 0,97 0,93 0,94 0,92 0,95 0,91

4780 6190 7204 9650 3720x2 4805x2 6156x2 7370x2 8340x2 19160 21340

22 35 32 36 26 22 33 36 32 32 40

11112222222

4,53 5,96 6,64 7,66 7,05 8,85 11,55 13,4 14,78 17,83 21,35

11112222222

23,8 28,1 29,5 50,0 41,0 50,0 51,4 65,0 67,6 91,0 91,0 21,8 26,4 27,6 46,3 37,0 46,3 47,5 62,2 64,5 85,0 85,0 0,92 0,94 0,94 0,93 0,90 0,93 0,92 0,96 0,95 0,93 0,93

3890 4590 4590 8170 6710 8170 8170 10630 10630 14870 14870

26 35 35 46 30 46 46 26 26 53 53

1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F 2" F 2" F 2" F 2" F

1" F 1" F 1" F 1" F 1" F 1" F 1" F 1"1/2 F 1"1/2 F 1"1/2 F 1"1/2 F

9,3 9,3 9,3 14,1 14,1 14,1 14,1 19,2 19,2 24 24

Scambiatore a piastre AISI316

11112222211 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 2" M 2" M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 1" 1/4 M 2" M 2" M

2,5 2,5 3,0 3,8 2x1,6 2x2,5 2x2,5 2x3 2x3,8 8,5 8,5

6000 7500 8000 13000 10000 13000 13500 18000 19000 24000 24000

11122223333

0,89 1,60 1,80 3,40 2,09 3,40 3,65 4,50 5,20 6,1 6,1

56 60 60 64 59 64 64 67 67 67 67

G4 G4 G4 G4

55555558888

3,75 3,75 3,75 3,75 3,75 3,75 3,75 6666

33333333333

9 9 9 15 15 15 15 18 18 18 18

1000 1550 2100 2650

790 790 790 790

1980 1980 1980 1980

030m 039m 039m 052m 039m 052m 062m 078m 092m 103m 123m

16 English 05/09 ACCURATE AX - AW - AD - AT - AF

* PAY ATTENTIONS: PIPELINE DIMENSIONS MUST BE CALCULATED FROM INSTALLED LOCALLY, FOLLOWING THE INSTRUCTION ON WATER CONNECTIONS PARAGRAPHS

4 - water IN / OUT 70°C/60°C, air 20°C 6 - water IN / OUT 45°C/40°C, air 20°C

PERFORMANCE Frame F1 F2 F3 F4 F5 F6 Model 7 101518202629393040505560708090

Heating Capacity (4) kW 10,4 10,4 20,2 20,2 14,4 16,1 16,1 28,7 25,0 28,7 28,7 39,3 39,3 39,3 41,6 41,6 Water Flow (4) l/h 910 910 1780 1780 1270 1410 1410 2520 2190 2520 2520 3450 3450 3450 3570 3570 Total pressure drops (4) kPa 15 15 30 30 16 19 19 46 36 46 46 40 40 40 27 27 Heating Capacity (6) kW 5,1 5,1 9,9 9,9 7,0 7,9 7,9 14,1 12,3 14,1 14,1 19,3 19,3 19,3 20,5 20,5 Water Flow (6) l/h 890 890 1730 1730 1220 1370 1370 2460 2150 2460 2460 3350 3350 3350 3560 3560 Total pressure drops (6) kPa 15 15 29 29 15 19 19 47 37 47 47 39 39 39 28 28 Water connectionsi inch 1/2 1/2 1/2 1/2 1/2 1/2 1/2 3/4 3/4 3/4 3/4 3/4 3/4 3/4 1 1

HOT WATER RE-HEATING

AIU

Post reheating system by mean hot water, composed by finned coil with copper tubes, 3 way valve and actuator driven with the logic implemented in EVOLUTION controller

English 05/09ACCURATE AX - AW - AD - AT - AF

ACCESSING THE MAIN COMPONENTS

AIU

The air-conditioner is accessible from all sides by removing the various panels. The front and/or side panels are opened in 2 different ways:

FRONT PANELS

All the front panels are hinged and fitted with locking latches and seal. All the front panels are opened and closed using a tool (typically a screwdriver) to open and close the latches. Once the latches have been opened, the front panels can be swung open and then removed vertically to simplify the service operations on the air-conditioner, especially where there is little space available. Opening the front panels provides access to all the components in the air-conditioner involved in routine maintenance. The number of front panels depends on the capacity of the airconditioner.

SIDE PANELS

All the side panels are accessible and removable. Nonetheless, these do not need to be removed for routine maintenance operations. This means that, if necessary, a series of units can be installed next to each other. The side panels are fastened by screws. These are accessible directly on the side panel by removing the black plastic caps.

BACK PANELS

Fastened by normal self-tapping screws, these are not accessible as when installed the back of the unit is against the wall

INSIDE PANELS

The compartment that contains the fans and the heaters is protected and insulated by a metal plate. This is for safety reasons, so as to not have to shut the unit down during normal maintenance operations.

WARNING: before restarting the air-conditioner, always check that all the panels have been correctly replaced.

electrical panel

18 English 05/09 ACCURATE AX - AW - AD - AT - AF

TRANSPORT AND HANDLING

Move the air-conditioner, which must not be reclined or tipped over, nor exposed to the elements, as near as possible to the site of installation before removing the packaging and the pallet.

The units can be lifted:

- using a forklift, sliding the forks through the openings in the pallet;

- using fabric slings underneath the unit, making sure that when the slings are in tension these do not apply pressure on the top edges.

The air-conditioner must be stored indoors, preferably in its own packaging, and protected against excessive humidity (<85% RH) and temperature (< 50°C).

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

L mm 660 1060 1610 2160 2710

H mm 2250

P mm 560 850

The symbols shown on the packaging are compliant with the ISO 7000 standard; the meaning of the symbols is shown in the table.

FRAGILE: handle with care.

KEEP DRY: indicates that the packaged unit

must be kept in a dry place.

CENTRE OF GRAVITY: indicates the centre of gravity of the packaged unit.

KEEP AWAY FROM HEAT: indicates that the packaged unit must be kept away from sources of heat.

THIS SIDE UP: indicates the correct position of the packaged unit.

TEMPERATURE LIMITS: indicates the temperature limits for storing and handling the packaged unit.

USE NO HOOKS: indicates that hooks cannot be used to handle or lift the packaged unit.

DO NOT STACK the packages.

RECEIVING THE UNIT

Check, upon delivery, that the air-conditioner is intact and in perfect condition; immediately notify the carrier in writing of any damage that may be due to transport.

In particular, check that the panel where the user terminal is fitted has not been damaged. If the side panels have been damaged during transport, they must be replaced before installing the unit.

English 05/09ACCURATE AX - AW - AD - AT - AF

DIMENSIONS AND WEIGHT

AIU

OVER Models Frame 2OVER Models Frame 1

OVER Models Frame 3 OVER Models Frame 4

EC Radial fan

Centrifugal fan Centrifugal fan

EC Radial fan

EC Radial fan EC Radial fan

Centrifugal fan Centrifugal fan

AX (kg) 155 170 256 268 316 367 385 449 509 504 529 697 737 757 888 918

AW (kg) 161 177 266 280 328 381 399 467 528 528 554 725 766 791 948 979

AD(kg)////295342360414474469494/710730847877 AT(kg)////330381399453513508533/746766884914

AF(kg)////330381399453513508533/746766884914

Frame F1 F2 F3 F4 F5 F6 Mod. 07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

Net Weights

20 English 05/09 ACCURATE AX - AW - AD - AT - AF

OVER Models Frame 5

OVER Models Frame 6

EC Radial fan

Centrifugal fan

EC Radial fan

AX (kg) 155 170 256 268 316 367 385 449 509 504 529 697 737 757 888 918

AW (kg) 161 177 266 280 328 381 399 467 528 528 554 725 766 791 948 979

AD(kg)////295342360414474469494/710730847877

AT(kg)////330381399453513508533/746766884914 AF(kg)////330381399453513508533/746766884914

Frame F1 F2 F3 F4 F5 F6 Mod. 07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

Net Weights

English 05/09ACCURATE AX - AW - AD - AT - AF

UNDER Models Frame 1 UNDER Models Frame 2

UNDER Models Frame 3 UNDER Models Frame 4

AX (kg) 155 170 256 268 316 367 385 449 509 504 529 697 737 757 888 918

AW (kg) 161 177 266 280 328 381 399 467 528 528 554 725 766 791 948 979

AD(kg)////295342360414474469494/710730847877 AT(kg)////330381399453513508533/746766884914

AF(kg)////330381399453513508533/746766884914

Frame F1 F2 F3 F4 F5 F6 Mod. 07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

Net Weights

22 English 05/09 ACCURATE AX - AW - AD - AT - AF

UNDER Models Frame 5

UNDER Models Frame 6

AX (kg) 155 170 256 268 316 367 385 449 509 504 529 697 737 757 888 918

AW (kg) 161 177 266 280 328 381 399 467 528 528 554 725 766 791 948 979

AD(kg)////295342360414474469494/710730847877

AT(kg)////330381399453513508533/746766884914 AF(kg)////330381399453513508533/746766884914

Frame F1 F2 F3 F4 F5 F6 Mod. 07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

Net Weights

English 05/09ACCURATE AX - AW - AD - AT - AF

POSITIONING THE AIR-CONDITIONER

AIU

The air-conditioner can rest directly on the floor, perfectly level, with a maximum difference in height of 5 mm between the ends of the base: incorrect levelling may cause the condensate to leak from the collection pan.

WARNING: the air-conditioner must be installed indoors and in non-aggressive environments. Apply an elastic gasket around the perimeter of the base to prevent the transmission of noise and vibrations.

SUPPORT FRAME (optional accessory)

A support frame is recommended:

- to allow the air-conditioner to be installed before assembling the raised floor;

- to totally dampen any mechanical vibrations;

- to assist the laying of pipes and cables.

The support frame is available as an accessory and is adjustable in height, indicated in the figure by the distance X, between 200 and 600 mm. To prevent the transmission of noise and vibrations, an elastic gasket, at least 5 mm thick, should be inserted between the panels of the raised floor and the frame, which must also be insulated from the metallic structure of the floor.

NOTE: the frame must be fitted by the installer following the instructions shown inside the packaging.

X = 200 ÷ 600 mm

L1(mm) 600 1000 980 1530 2080 2630 P1(mm) 485 485 770 770 770 770

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

Raised floor

Elastic gasket

ACCURATE unit

OPERATING SPACE

AIU

Access is from the front only for all models. This feature ensures easy access to all the main components in the unit for installation and periodical maintenance. Thanks to this feature, the units can be installed next to one another, or alternatively fitted in racks. To ensure easy maintenance, a space of at least 600 mm must be left in front of the air-conditioner, as shown in the figure.

Make sure that the air intake and outlet are never blocked, even partially.

D mm >600

E mm 0 L mm 0

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

24 English 05/09 ACCURATE AX - AW - AD - AT - AF

OPERATING LIMITS

AIU

All versions. The DX units are designed for operation within

the following operating ranges (the limits are considered for new units that have been correctly installed and maintained):

Environmental conditions from 18.0°C, 45% RH at 30.0°C, 55% RH

Outside conditions from +10.0°C to +46.0°C in STANDARD version without condensing control from -20.0°C to +46.0°C in MODULATING version with condensing control from -45.0°C to +46.0°C in the LT version (low temperature).

For the correct operation of the air-conditioner, the conditions shown in the following graph must be observed:

18° C/45% ROOM TEMPERATURE

30°C/55%t

-20°C

-45°C

46°C

External Temperature °C

35°C

standard version

LT version (low temperature)

OPERATING ZONE

28°C

OPTIONAL BASE MOULDING (OVER UNITS)

AIU

The "OVER" units are designed for the connections to pass through the base of the unit; nonetheless, if there is no raised floor (units with intake from the rear or front), to simplify the

connection of the pipes and cables, a base moulding must be used.

The base moulding, available as an accessory, is epoxy-polyester powder painted, in the same colour as the external panels on the air-conditioner, measures 200 mm in height and is fitted with an inspection panel at the front fastened by two latches tightened 1/4 of a turn. The inside walls are lined with soundproofing material. On the right- and left-hand sides of the base moulding are six pre-cut sections for passing the cables and pipes; The moulding must be fastened to the air-conditioner using the M6 threaded inserts already arranged on the base. For the OVER units with intake from the bottom, base mouldings are available with a height of 500 mm. In this case too, the air-conditioner must be screwed to the base moulding during the positioning phase.

200

air-conditioner base

unit moulding

450

Access to the inlet/outlet connections from the rear

A1 mm 600 1000 980 1530 2080 2630 C1 mm 485 485 770 770 770 770

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

English 05/09ACCURATE AX - AW - AD - AT - AF

AIR DISTRIBUTION, UNDER UNITS (UNDER UNITS)

AIU

In the units with air outlet from the bottom, the following details must be ensured to allow for sufficient air flow-rate:

a) connection opening between the unit and the raised

floor; make a hole in the raised floor and position the air-con-

ditioner over the centre of the hole: the air outlet opening must not be blocked, even partially, by parts of panels, beams, pipes or other objects; insert an elastic gasket around the perimeter of the base to prevent the transmission of noise and vibrations;

b) free air flow along the cavity of the raised floor; the

duct represented by the underfloor space must be sufficiently high (at least 200-250 mm of free space, net of the panels and the beams of the raised floor) and free of obstructions, especially near the air-conditioner;

c) grills and air distribution openings in the room; the air

exits the underfloor space through openings or grills, the position and surface area of which must be proportional to the layout of the thermal load of the environment.

For units with air outlet from the bottom, the recommended air outlet speed from the raised floor is between 1 and 2.5 m/s; consequently, the cross-section of the grills should be sized based on this value The total outflow area (sum of the areas of the openings and net space of the grills) required for each model must be calculated by dividing the total air flow-rate (in m3/s) by the required outlet speed (in m/s).

WARNING: the air outlet must be completely free, as an insufficient air outflow air will reduce the flow-rate, the performance of the air-conditioner and may affect reliability.

INTAKE PLENUM, UNDER VERSIONS (UNDER UNITS)

AIU

For ducting the air intake, plenums are available to be fitted between the top of the unit and the air return duct or the falseceiling.

L (mm) 600 1000 1000 1550 2100 2650 P (mm) 500 500 790 790 790 790 H (mm) 350 500

INTAKE PLENUM, UNDER VERSIONS (OVER UNITS)

AIU

For ducting the air intake, plenums are available to be fitted between the top of the unit and the air return duct or the falseceiling.

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

L (mm) 600 1000 1000 1550 2100 2650 P (mm) 500 500 790 790 790 790 H (mm) 350 500

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

26 English 05/09 ACCURATE AX - AW - AD - AT - AF

MOTOR-DRIVEN DAMPER OVER/UNDER (UNIT OVER/UNDER)

AIU

The motor-driven damper, available as an optional accessory, is located inside a plenum measuring 150 mm high. The OVER and UNDER units are delivered with the damper already fitted, on the intake, as shown in the figure.

H (mm) 100 150

07÷18 20÷90

FRONT OUTLET PLENUM (OVER UNITS)

AIU

The figure shows the front outlet plenum (optional for OVER units).

L (mm) 600 1000 1000 1550 2100 2650 P (mm) 500 500 790 790 790 790 H (mm) 350 500

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

FRONT OUTLET MOULDING (UNDER UNITS)

AIU

The figure shows the moulding for the front air outlet (optional for Under units).

L (mm) 600 1000 1000 1550 2100 2650 P (mm) 485 485 770 770 770 790 H (mm) 350 500

07 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

English 05/09ACCURATE AX - AW - AD - AT - AF

OPTIONAL FRESH AIR

AIU

OPTIONAL AIR FILTER

AIU

The standard filter (G2/G4) and optional (F5/F6/F7/F8) are installed inside the conditioning unit before the finned coil.

Additional pressure drop:

The fresh air kit is supllied with G3 filter installed in suction side of fan, allowing to mix the fresh air with recirculating air. Connect a flexible pipe diameter 100mm (not supplied) as shown in the image below. The fresh air volume is around 5% of nominal air flow of unit.

Frame 1

100

150

200

250

1000 1500 2000 2500 3000 3500

m³/h

Frame 2

100

150

200

250

3500 4000 4500 5000 5500 6000 6500

m³/h

Frame 3

100

150

200

250

3500 4500 5500 6500 7500 8500 9500

m³/h

Frame 4

100

150

200

250

7500 8500 9500 10500 11500 12500 13500 14500

m³/h

Frame 5

100

150

200

250

9000 11000 13000 15000 17000 19000 21000

m³/h

Frame 6

100

150

200

250

300

350

13500 15500 17500 19500 21500 23500 25500

m³/h

OVER UNDER

28 English 05/09 ACCURATE AX - AW - AD - AT - AF

POSITION AND DIAMETER OF THE WATER CONNECTIONS

AIU

OVER CONNECTIONS (AX-AW) size 07 - 10

IR IN refrigerant AX OR OUT refrigerant AX IW IN water cooled AW OW OUT water cooled AW IP IN power supply IH IN humidifier water OH OUT humidifier water and condensate water drain IHW IN hot water OHW OUT hot water

UNDER CONNECTIONS (AX-AW) size 07 - 10

IR IN refrigerant AX OR OUT refrigerant AX IW IN water cooled AW OW OUT water cooled AW IP IN power supply IH IN humidifier water OH OUT humidifier water IHW IN hot water OHW OUT hot water

OVER CONNECTIONS (AX-AW) size 15 - 18

English 05/09ACCURATE AX - AW - AD - AT - AF

UNDER CONNECTIONS (AX-AW) size 15 - 18

OVER CONNECTIONS (AX-AW-AD-AT-AF) size 20 - 26 - 29

IR IN refrigerant AX-AD OR OUT refrigerant AX-AD IW IN water cooled AW OW OUT water cooled AW-AT-AF IWF IN water AF-AT IP IN power supply IH IN humidifier water OH OUT humidifier water IHW IN hot water OHW OUT hot water OC OUT condensate water drain

UNDER CONNECTIONS (AX-AW-AD-AT-AF) size 20 - 26 - 29

30 English 05/09 ACCURATE AX - AW - AD - AT - AF

OVER CONNECTIONS (AX-AW-AD-AT-AF) size 30 - 39 - 40 - 50

IR1 IN refrigerant circ. 1 AX-AD OR1 OUT refrigerant circ. 1 AX-AD IR2 IN refrigerant circ. 2 AX-AD OR2 OUT refrigerant circ. 2 AX-AD IW1 IN water cooled circ. 1 AW OW1 OUT water cooled circ. 1 AW-AF-AT IW2 IN water cooled circ. 2 AW OW2 OUT water cooled circ. 2 AW-AF-AT IWF IN water AF-AT IP IN power supply IH IN humidifier water OH OUT humidifier water IHW IN hot water OHW OUT hot water OC OUT condensate water drain

UNDER CONNECTIONS (AX-AW-AD-AT-AF) size 30 - 39 - 40 - 50

OVER CONNECTIONS (AX-AW-AD-AT-AF) size 55- 60 - 70

English 05/09ACCURATE AX - AW - AD - AT - AF

UNDER CONNECTIONS (AX-AW-AD-AT-AF) size 55- 60 - 70

OVER CONNECTIONS (AX-AW-AD-AT-AF) size 80 - 90

IR1 IN refrigerant circ. 1 AX-AD OR1 OUT refrigerant circ. 1 AX-AD IR2 IN refrigerant circ. 2 AX-AD OR2 OUT refrigerant circ. 2 AX-AD IW IN water cooled AW OW OUT water cooled AW-AT-AF IWF IN water AF-AT IP IN power supply IH IN humidifier water OH OUT humidifier water IHW IN hot water OHW OUT hot water

UNDER CONNECTIONS (AX-AW-AD-AT-AF) size 80 - 90

32 English 05/09 ACCURATE AX - AW - AD - AT - AF

CONNECTION TO BRAZED PLATE CONDENSER AW-AT-AF

AIU

AW-AT-AF water-cooled units

The condenser must be connected to the cooling water circuit, making sure that the water inlet and outlet connections are correct. If the water temperature falls below the dew point of the conditioned air, insulate the pipes with closed cell material (e.g.: Armaflex or equivalent) to prevent condensation; the insulation must allow access to the valves and the three-piece joints.

Seal the holes where the pipes pass through the base of the airconditioner to avoid the bypass of air.

N.B.: the water system of the unit is PN16

WATER CONNECTIONS

AIU

For all the water connections (with the exception of the condensate drain), the following are recommended:

- flexible connections to avoid transmitting vibrations and allow small movements of the air-conditioner;

- joints in three pieces, near the fittings, to simplify the removal of the unit;

- on-off valves to disconnect the unit from the water circuit: where possible use ball valves with full opening to minimise pressure drop.

(For AW-AT-AF models) check that the cross-section of the chilled water pipes and the characteristics of the circulating pump are suitable: an insufficient water flow-rate affects the performance of the air-conditioner. Check that the water inlet and outlet connections are correct. Insulate all the chilled water pipes with closed cell material (e.g.: Armaflex or equivalent), to prevent condensation; the insulation must allow access to the valves and the three-piece joints.

(For AW-AT-AFmodels) check that the water circuit has been filled with an antifreeze mixture containing the right percentage of ethylene glycol.

To select the pipeline refer to "Pressure Drops on stainless steel pipes"

CORRECTION FACTORS

AIU

ETHYLENE GLYCOLE

A mix of water plus glycole used has fluid instead of only water cause a cooling capacity reduction of the unit. Multiplay the cooling capacity for the values reported of the following tables

Iceing temperature 0 -5 -10 -15 -20 -25 % of glycole on tot. charge 0 12% 20% 28% 35% 40%

Flow factor cQ 1 1,02 1,04 1,075 1,11 1,14 P. drops factor cdp 1 1,07 1,11 1,18 1,22 1,24

INCROSTATION FACTOR

All datas reported are refered to a complete clean brazed blade condenser (incrostation factor = 1). For different values of incrostation factor multiplay all datas reported on cooling capacity tables for factors reported on following table.

Incrostation factor (m2°C/W) 4,4 x10-5 0,86x10-4 1,72x10-4

Incrostation factor f1 --- 0,96 0,93 Compressor factor fk1 --- 0,99 0,98 Total power factor fx1 --- 0,99 0,98

English 05/09ACCURATE AX - AW - AD - AT - AF

Linear Pressure Drops, (mm w.c./m)

1.000

100

200

300

400

500

600

700

800

900

9 8 7 6 5 4 3 2 1 100 90 80 70 60 50 40 30 20 500 400 300 200

10.000

2 .0 00

3 .0 00

4.000

5.000

7.000

8.000

9.000

100.000

20.000

30.000

40.000

50.000

60.000

70.000

80.000

90.000

200.000

300.000

400.000

500.000

1.000

100

200

300

400

500

600

700

800

900

10.000

.0 00

4.000

5.000

6.000

7.000

8.000

9.000

100.000

20.000

30.000

40.000

50.000

60.000

70.000

80.000

90.000

200.000

300.000

400.000

500.000

10 9 8 7 6 5 4 3 2 1 100 90 80 70 60 50 40 30 500 400 300 200

6.000

Water flow l/h

12 14 16 18

, 0

s / m

8 , 0

s / m

, 1

s / m

, 1

s / m

, 1

s / m

, 1

s / m

0 , 2

s / m

, 2 5

s / m

0 , 3

s / m

, 3

s / m

0 , 4

s / m

s / m 0 , 1

” 2 Ø

” 2 / 1 1 Ø

” 4 / 1 1 Ø

” 1 Ø

” 4 / 3 Ø

” 2 / 1 Ø

” 8 / 3 Ø

” 5 Ø

” 4 Ø

” 3 Ø

” 2 / 1 2 Ø

” 6 Ø

” 5 Ø

” 4 Ø

” 3 Ø

” 2 / 1 2 Ø

” 2 Ø

” 2 / 1 1 Ø

” 4 / 1 1 Ø

” 1 Ø

” 4 / 3 Ø

2 , 0

s / m

4 , 0

s / m

6 , 0

s / m

8 , 0

s / m

Pressure Drops on stainless steel pipes (inch.). Water T .= 10°C

EXAMPLE OF SELECTION:

• consider a water speed limit inside the pipeline of 1-1,2m/s

• cross the water flow value requested (in the example 5.000l/h)

• extract the pressure drop value of pipe diameter selected (in example 35mm w.c./m)

34 English 05/09 ACCURATE AX - AW - AD - AT - AF

Linear Pressure Drops, (mm w.c./m)

1.000

100

200

300

400

500

600

700

800

900

9 8 7 6 5 4 3 2 1 100 90 80 70 60 50 40 30 20 500 400 300 200

10.000

2 .0 00

3 .0 00

4.000

5.000

7.000

8.000

9.000

100.000

20.000

30.000

40.000

50.000

60.000

70.000

80.000

90.000

200.000

300.000

400.000

500.000

1.000

100

200

300

400

500

600

700

800

900

10.000

2 .0 00

.0 00

4.000

5.000

6.000

7.000

8.000

9.000

100.000

20.000

30.000

40.000

50.000

60.000

70.000

80.000

90.000

200.000

300.000

400.000

500.000

10 9 8 7 6 5 4 3 2 1 100 90 80 70 60 50 40 30 500 400 300 200

6.000

Water Flow l/h

12 14 16 18

8 , 0

s / m

, 1

s / m

, 1

s / m

, 1

s / m

, 1

s / m

0 , 2

s / m

, 2 5

s / m

0 , 3

s / m

, 3

s / m

0 , 4

s / m

2 , 0

s / m

4 , 0

s / m

6 , 0

s / m

8 , 0

s / m

s / m 0 , 1

, 0 6

s / m

” 6 Ø

” 5 Ø

” 4 Ø

” 3 Ø

” 2 / 1 2 Ø

” 2 Ø

” 2 / 1 1 Ø

” 4 / 1 1 Ø

” 1 Ø

” 4 / 3 Ø

” 5 Ø

” 4 Ø

” 3 Ø

” 2 / 1 2 Ø

” 2 Ø

” 2 / 1 1 Ø

” 4 / 1 1 Ø

” 1 Ø

” 4 /

3 Ø

” 2 / 1 Ø

” 8 / 3 Ø

Pressure Drops on stainless steel pipes (inch.). Water T .= 50°C

English 05/09ACCURATE AX - AW - AD - AT - AF

Linear Pressure Drops (mm w.c./m)

1.000

100

200

300

400

500

600

700

800

900

9 8 7 6 5 4 3 2 1 100 90 80 70 60 50 40 30 20 500 400 300 200

10.000

2 .0 00

3 .0 00

4.000

5.000

7.000

8.000

9.000

100.000

20.000

30.000

40.000

50.000

60.000

70.000

80.000

90.000

200.000

300.000

400.000

500.000

1.000

100

200

300

400

500

600

700

800

900

10.000

2 .0 00

3 .0 00

4.000

5.000

6.000

7.000

8.000

9.000

100.000

20.000

30.000

40.000

50.000

60.000

70.000

80.000

90.000

200.000

300.000

400.000

500.000

10 9 8 7 6 5 4 3 2 1 100 90 80 70 60 50 40 30 500 400 300 200

6.000

Water Flow l/h

12 14 16 18

8 , 0

s / m

, 1

s / m

, 1

s / m

, 1

s / m

, 1

s / m

0 , 2

s / m

, 2 5

s / m

0 , 3

s / m

, 3

s / m

0 , 4

s / m

2 , 0

s / m

4 , 0

s / m

6 , 0

s / m

8 , 0

s / m

s / m 0 , 1

, 0 6

s / m

” 6 Ø

” 5 Ø

” 4 Ø

” 3 Ø

” 2 / 1 2 Ø

” 2 Ø

” 2 / 1 1 Ø

” 4 / 1 1 Ø

” 1 Ø

” 4 / 3 Ø

” 5 Ø

” 4 Ø

” 3 Ø

” 2 / 1 2 Ø

” 2 Ø

” 2 / 1 1 Ø

” 4 / 1 1 Ø

” 1 Ø

” 4 / 3 Ø

” 2 / 1 Ø

” 8 / 3 Ø

Pressure Drops on stainless steel pipes (inch.). Water T .= 80°C

36 English 05/09 ACCURATE AX - AW - AD - AT - AF

AIR CONDENSER: SUGGESTED INSTALLATION

AIU

1/100

max 30 metres

discharge

air-conditioner

heat insulation

outlet

liquid

max 5

metres

air-conditioner

max 15 metres

max 3

metres

max 3

metres

heat insulation

air-conditioner

N.B.: the liquid pipes must be protected against solar radiation

Install an oil separator for pipe lenght above 30m, (see the oil separator paragraph)

English 05/09ACCURATE AX - AW - AD - AT - AF

REFRIGERANT CONNECTIONS (AX)

AIU

DIAMETERS OF THE CONNECTIONS INSIDE THE UNIT

The diameter of connecting pipes between the conditioner and condensing unit must be respected, otherwise the guarantee becomes invalid. Always use large radius curve (bending radius at least equal to pipe diameter)

NOTE: The diameter of the refrigerant lines between the air-conditioner and the remote condenser (OD) must be chosen according to the length of the lines, and therefore this will not always coincide with the inside diameter of the joint to be welded supplied by the manufacturer. Special care must be paid to the insulation of the hot gas pipes under the raised floor.

RECOMMENDED OUTSIDE DIAMETERS OF THE LINES (for equivalent lengths up to 30m)

Model 07 10 18 20 26 29 39 30 40 50 55 80 90

15 60 70

Ø Liquid Line (mm) 12 12 16 12 16 18 Ø Gas Outlet Line (mm) 12 18 22 18 22 22

Models 7 10 15 18 29 39 30 40 60 70 80 90

20 26 50 55

GAS PIPELINE TYPE DIAMETER PIPE mm R407C Liquid line 12 16 18 2x16 2x16 2x18

Discharge line 18 22 22 2x22 2x22 2x22 2x22

R410A Liquid line 10 14 16 2x14 2x16 2x16

Discharge line 16 18 22 2x18 2x22 2x22 2x22

Equivalents lenght in meters of: curve, shut-off and non-return valve

Nominal diameter

(mm)

90° 45° 180° 90°

12 0,50 0,25 0,75 2,10 1,90

14 0,53 0,26 0,80 2,20 2,00

16 0,55 0,27 0,85 2,40 2,10

18 0,60 0,30 0,95 2,70 2,40

22 0,70 0,35 1,10 3,20 2,80

28 0,80 0,45 1,30 4,00 3,30

38 English 05/09 ACCURATE AX - AW - AD - AT - AF

OIL SEPARATOR

AIU

In the installation of air cooled units (AX-AD) with remote condenser, if the refrigerant pipeline are more than 30mt is recommended to install an oil separator on site, in order to avoid that the oil goes away with the refrigerant causing compressor damages Finally, the use of an oil separator leads to:

• a longer life of the compressor;

• a better performance of the whole system with consequent energy saving, due the high coefficient of condenser and evaporator performance by almost completely removing oil deposits from their exchange surfaces;

• a quieter operation by reducing pulsations.

The oil separator have to be selected considering the following parameters:

• power cooling of refrigerant system

• refrigerant fluid type

• the inlet diameter of oil separator have to be equal to the dicharge gas diameter of compressor

POWER COOLING IN kW*

* refered to evaporating temperature +5°C and condensing temperature 40°C

The oil separators have to be installed in the discharge line between the compressor and the condenser mounted securely in a vertical position and reasonably close to the compressor. Oil separator performs best when operating at or near the compressor discharge temperature. In location the oil separator, choose a position to avoid, as far as possible, chilling of the shell, which may result in condensing of liquid within the separator. If this is not possible, it is advisable to supply the separator with the insulation or strap heater to prevent the refrigerant in the system from condensing in the shell.

Acting as the lay out of refrigerating system, the return line may be run from the oil fitting to the suction line upstream the compressor.

A sight glass may be installed in the oil line, in a position that oil is flowing through the tube, to check the correct working of the oil separator. Oil separators must be always pre-charged before its use, as described on the table, with the same oil of the compressor

Models R410A R407

OS 10 11,5 10 OS 30 33 29 OS 40 42 38

Frame F1 F2 F3 F4 F5 F6 Models 7 10 15 18 20 26 29 39 30 40 50 55 60 70 80 90

OIL SEPATATOR Models OS10 OS30 OS40 OS30 OS40

Precharge 0,3 lt 0,3 lt 0,3 lt 0,3 lt 0,3 lt

Model STD-LT

Volume

Indicative R407C

gas content (kg)*

Model LN

Volume

Indicative R407C

gas content (kg)*

BRC014m 5 2,5 BRC014m - LN 7 2,3 BRC025m 8 4 BRC025m - LN 8 3,7 BRC032m 15 7,5 BRC032m - LN 15 7 BRC052m 15 7,5 BRC052m - LN 23 7 BRC051b 15 7,5 BRC051b - LN 23 7 BRC077b 22 11 BRC077b - LN 23 10,2 BRC088b 34 17 BRC088b - LN 45 15,8 BRC093b 45 22,5 BRC093b - LN 30 20,9 BRC102b 30 15 BRC102b - LN 45 14 BRC120b 45 22,5 BRC120b - LN 60 20,9

Outdoor air cooled condenser BRC - R407C

R407C Discharge line gr/m - 20 34 45 73 120

Liquid line gr/m 66 100 178 233 364 -

R410A Discharge line gr/m - 17 29 39 64 105

Liquid line gr/m 59 90 160 209 327 -

English 05/09ACCURATE AX - AW - AD - AT - AF

VOLUME

AIU

* Weight of the gas indicated in the table is purely

indicative Real value of refrigerant charges in AW - AF - AT models are reported on RATING PLATE attached inside unit.

N.B. Important: when gas is added,lubrication oil must also be added in a ratio of 10% weight of the refrigerant gas aded.

Pipe diameter 10 12 16 18 22 28

GAS CONTENT FOR LINEAR METER

Evaporator coil

Indicative gas

Models volume content (kg)*

R407C R410A

AX 07 2,6 1,9 1,7 AX 10 3,9 2,4 2,2 AX 15 4,9 4,2 3,9 AX 18 7,3 5,2 4,8 AX-AD 20 9,4 6,2 5,8 AX-AD 26 9,4 6,2 5,8 AX-AD 29 9,4 6,2 5,8 AX-AD 39 15,6 8,7 8,2 AX-AD 30 2X5,2 2X3,3 2X3,1 AX-AD 40 2X7,8 2X4,35 2X4,1 AX-AD 50 2X7,8 2X4,35 2X4,1 AX55 2X11,1 2X5,7 2X5,4 AX-AD 60 2X11,1 2X5,7 2X5,4 AX-AD 70 2X11,1 2X5,7 2X5,4 AX-AD 80 2X17,8 2X10,5 2X9,9 AX-AD 90 2X17,8 2X10,5 2X9,9

INDOOR COIL VOLUME AND REFRIGERANT CHARGE

Model STD-LT

Volume

Indicative R410A

gas content (kg)*

Model LN

Volume

Indicative R410A

gas content (kg)*

BRE014m 2,1 1,1 BRE014m-LN 3,3 1 BRE022m 3,3 1,7 BRE022m-LN 6,2 1,5 BRE027m 6,6 3,3 BRE027m-LN 6,6 3,1 BRE044m 6,5 3,3 BRE044m-LN 9,7 3 BRE051m 9,7 4,9 BRE051m-LN 14,5 4,5 BRE054b 13,2 6,6 BRE054b-LN 19,2 6,1 BRE065b 9,6 4,8 BRE065b-LN 34,5 4,5 BRE076b 14,5 7,3 BRE076b-LN 45,6 6,7 BRE100b 46 23 BRE100b-LN 46 21,4 BRE116b 43 21,5 BRE116b-LN 43,9 20

Outdoor air cooled condenser BRE - R410A

CONDENSER COIL VOLUME AND REFRIGERANT CHARGE

* Weight of the gas indicated in the table is purely indicative

40 English 05/09 ACCURATE AX - AW - AD - AT - AF

CONDENSATE DRAIN

AIU

The condensate is removed from the pan located underneath the coil through a hose with drain trap, already fitted in the unit; the end of the hose should be connected to the sewerage system in the building via a rubber or plastic hose with an inside diameter of 20 mm.

If the air-conditioner is fitted with a humidifier, the condensate is drained from the humidifier pan, excluding Over units (see the following paragraph). During installation, pour water into the condensate collection pan so as to fill the drain trap inside the unit with water.

ELECTRICAL CONNECTIONS

AIU

Correct electrical connection, performed in a workmanlike manner and in compliance with the standards in force, is important for the prevention of accidents and the good and long-lasting operation of the air-conditioner.

ACCESS TO THE ELECTRICAL PANEL AND CABLE INLETS

Before performing any work on the electrical parts, make sure that there is no live voltage and that the disconnecting switch is open (position “O”); The power section of the electrical panel is protected by a plastic screen; to remove the screen, open the main switch and remove the fastening screws.

OFF

N L1 L2 L3

N1 R1 S1 T1

Part A: connection of the power cable to the main disconnecting switch IG

Power cable (provided by the customer)

1 Shielded RS485 or LAN cable outlet; 2 Mains power supply inlet; 3 Remote control and alarm signal

cable inlet.

4 Local user terminal 5 Electrical panel

CONNECTION TO THE MAINS - CROSS-SECTION OF THE CABLES - PROTECTION DEVICES

- Check that the mains voltage corresponds to the rated val- ues for the unit (voltage, no. of phases, frequency) shown on the electrical panel.

The power supply voltage must be between ± 10% of the rated value: operation at voltages outside of these limits may void the warranty.

- Fasten the ends of the power cable to the terminals on the main switch inside the electrical panel; fully tighten the screws. Connect the yellow-green earth wire to the special terminal marked 'PE'.

ACCESS TO THE BOARD

To access the board, open the front panel and the thermoformed cover on the electrical panel. The electronic components are sensitive to discharges of static electricity from the human body. Touch an earthed object before handling any electronic component.

English 05/09ACCURATE AX - AW - AD - AT - AF

MINIMUM CROSS-SECTION OF THE POWER CABLES

AIU

The cross-section of the power cable must be chosen according to the length of the cable and the type of installation, based on the maximum current input of the air-conditioner and so as to prevent excessive voltage drops (the power supply voltage must be between ± 10% of the rated value). The following table shows the minimum recommended cross-sections for the power cables.

- A backup fuse should be fitted upstream of the power line for short-circuit current up to 10 kA.

ELECTRICAL SPECIFICATIONS

AIU

TOTAL UNIT POWER INPUT R407C

B = cooling only R = cooling only + STD hearters

H = cooling only plus / dehumidification T = complete version (cooling only + STD heaters + humidifier/dehumid.)

TOTAL UNIT POWER INPUT R410A

B = cooling only R = cooling only + STD hearters

H = cooling only plus / dehumidification T = complete version (cooling only + STD heaters + humidifier/dehumid.)

Vers.

B R H T

Main Switch

Mod.

V/ph/Hz kW TOT FLA L1 FLA L2 FLA L3 mm² (1) kW TOT FLA L1 FLA L2 FLA L3 mm² (1) kW TOT FLA L1 FLA L2 FLA L3 mm² (1) kW TOT FLA L1 FLA L2 FLA L3 mm² (1) Amp

400/3N/50

3,30 7,95 5,1 5,1 6 7,30 7,95 25,35 7,95 10 5,55 17,75 14,9 14,9 10 7,30 7,95 25,35 7,95 10 40

400/3N/50

4,30 9,85 7 7 6 8,30 9,85 27,25 9,85 10 6,55 19,65 16,8 16,8 10 8,30 9,85 27,25 9,85 10 40

400/3N/50

6,94 16,7 11 11 6 14,94 16,7 51,5 16,7 16 10,69 22,2 16,5 16,5 10 14,94 16,7 51,5 16,7 16 63

400/3N/50

8,45 18,7 13 13 6 16,45 18,7 53,5 18,7 16 12,20 24,2 18,5 18,5 10 16,45 18,7 53,5 18,7 16 63

400/3N/50

10,45 19,77 19,77 19,77 6 19,45 32,67 32,67 32,67 10 14,2 25,27 25,27 25,27 10 19,45 32,67 32,67 32,67 10 40

400/3N/50

11,32 21,57 21,57 21,57 6 20,32 34,47 34,47 34,47 10 15,07 27,07 27,07 27,07 10 20,32 34,47 34,47 34,47 10 63

400/3N/50

12,94 24,37 24,37 24,37 10 21,94 37,27 37,27 37,27 10 16,69 29,87 29,87 29,87 10 21,94 37,27 37,27 37,27 10 63

400/3N/50

16,79 30,61 30,61 30,61 10 31,79 52,11 52,11 52,11 16 20,54 36,11 36,11 36,11 10 31,79 52,11 52,11 52,11 16 63

400/3N/50

15,98 30,31 30,31 30,31 10 25,36 40,81 40,81 40,81 16 19,73 35,81 35,81 35,81 10 25,36 40,81 40,81 40,81 16 63

400/3N/50

20,3 38,31 38,31 38,31 10 27,52 44,81 44,81 44,81 16 24,05 43,81 43,81 43,81 16 27,52 44,81 44,81 44,81 16 80

400/3N/50

22,04 41,91 41,91 41,91 16 28,39 46,61 46,61 46,61 16 25,79 47,41 47,41 47,41 16 28,39 47,41 47,41 47,41 16 80

400/3N/50

25,91 48,26 48,26 48,26 16 35,26 57,26 57,26 57,26 16 31,91 56,96 56,96 56,96 16 35,26 57,26 57,26 57,26 16 100

400/3N/50

29,15 53,86 53,86 53,86 16 36,88 60,06 60,06 60,06 16 35,15 62,56 62,56 62,56 16 36,88 62,56 62,56 62,56 16 100

400/3N/50

32,71 59,26 59,26 59,26 16 38,66 62,76 62,76 62,76 16 38,71 67,96 67,96 67,96 25 38,71 67,96 67,96 67,96 25 100

400/3N/50

36,52 66,9 66,9 66,9 25 40,31 65,7 65,7 65,7 25 42,52 75,6 75,6 75,6 25 42,52 75,6 75,6 75,6 25 125

400/3N/50

44,98 90,9 90,9 90,9 25 44,54 77,7 77,7 77,7 25 50,98 99,6 99,6 99,6 25 50,98 99,6 99,6 99,6 35 125

Vers.

B R H T

Main Switch

Mod.

V/ph/Hz kW TOT FLA L1 FLA L2 FLA L3 mm² (1) kW TOT FLA L1 FLA L2 FLA L3 mm² (1) kW TOT FLA L1 FLA L2 FLA L3 mm² (1) kW TOT FLA L1 FLA L2 FLA L3 mm² (1) Amp

400/3N/50

3,38 8,35 5,5 5,5 6 7,38 8,35 25,75 8,35 10 5,55 18,15 15,3 15,3 10 7,38 8,35 25,75 8,35 10 40

400/3N/50

4,18 9,85 7 7 6 8,18 9,85 27,25 9,85 10 6,55 19,65 16,8 16,8 10 8,18 9,85 27,25 9,85 10 40

400/3N/50

7,83 17,5 11,8 11,8 6 15,83 17,5 52,3 17,5 16 10,69 23 17,3 17,3 10 15,83 17,5 52,3 17,5 16 63

400/3N/50

9,61 20,7 15 15 6 17,61 20,7 55,5 20,7 16 12,20 26,2 20,5 20,5 10 17,61 20,7 55,5 20,7 16 63

400/3N/50

10,40 19,77 19,77 19,77 6 19,40 32,67 32,67 32,67 10 14,2 25,27 25,27 25,27 10 19,40 32,67 32,67 32,67 10 40

400/3N/50

13,54 25,77 25,77 25,77 6 22,54 38,67 38,67 38,67 10 15,07 31,27 31,27 31,27 10 22,54 38,67 38,67 38,67 10 63

400/3N/50

14,16 26,77 26,77 26,77 10 23,16 39,67 39,67 39,67 10 16,69 32,27 32,27 32,27 10 23,16 39,67 39,67 39,67 10 63

400/3N/50

18,45 33,31 33,31 33,31 10 33,45 54,81 54,81 54,81 16 20,54 38,81 38,81 38,81 10 33,45 54,81 54,81 54,81 16 63

400/3N/50

17,76 31,91 31,91 31,91 10 26,25 41,61 41,61 41,61 16 19,73 37,41 37,41 37,41 10 26,25 41,61 41,61 41,61 16 63

400/3N/50

20,20 38,31 38,31 38,31 10 27,47 44,81 44,81 44,81 16 24,05 43,81 43,81 43,81 16 27,47 44,81 44,81 44,81 16 80

400/3N/50

26,48 50,31 50,31 50,31 16 30,61 50,81 50,81 50,81 16 25,79 55,81 55,81 55,81 16 30,61 55,81 55,81 55,81 16 80

400/3N/50

30,35 56,66 56,66 56,66 16 37,48 61,46 61,46 61,46 16 31,91 65,36 65,36 65,36 16 37,48 65,36 65,36 65,36 16 100

400/3N/50

31,59 58,66 58,66 58,66 16 38,10 62,46 62,46 62,46 16 35,15 67,36 67,36 67,36 16 38,10 67,36 67,36 67,36 16 100

400/3N/50

36,03 64,66 64,66 64,66 16 40,32 65,46 65,46 65,46 16 38,71 73,36 73,36 73,36 25 40,32 73,36 73,36 73,36 25 100

400/3N/50

41,22 74,9 74,9 74,9 25 42,66 69,7 69,7 69,7 25 42,52 83,6 83,6 83,6 25 42,66 83,6 83,6 83,6 25 125

400/3N/50

42,60 80,9 80,9 80,9 25 43,35 72,7 72,7 72,7 25 50,98 89,6 89,6 89,6 25 50,98 89,6 89,6 89,6 25 125

42 English 05/09 ACCURATE AX - AW - AD - AT - AF

POWER INPUT OF THE INDIVIDUAL COMPONENTS

07 400/3/50 1 2,64 5,1 32 1 2,72 5,5 32 10 400/3/50 1 3,64 7,0 46 1 3,52 7 46 15 400/3/50 1 5,62 11,0 65,5 1 6,51 11,8 64 18 400/3/50 1 7,13 13,0 74 1 8,29 15 75 20 400/3/50 1 7,78 15,0 101 1 7,73 15 101 26 400/3/50 1 8,65 16,8 111 1 10,87 21 111 29 400/3/50 1 10,27 19,6 118 1 11,49 22 118 39 400/3/50 1 12,05 22,3 118 1 13,71 25 118 30 400/3/50 2 5,62 11,0 65,5 2 6,51 11,8 64 40 400/3/50 2 7,78 15,0 101 2 7,73 15 101 50 400/3/50 2 8,65 16,8 111 2 10,87 21 111 55 400/3/50 2 8,65 16,8 111 2 10,87 21 111 60 400/3/50 2 10,27 19,6 118 2 11,49 22 118 70 400/3/50 2 12,05 22,3 118 2 13,71 25 118 80 400/3/50 2 14,21 27 140 2 16,56 31 140 90 400/3/50 2 18,44 39 174 2 17,25 34 174

R407C Compressor R410A Compressor

Mod V/ph/Hz Qtà FLI (kW) FLA (A) LRA(A) Qtà FLI (kW) FLA (A) LRA(A)

(*) n° of fan motor with belt driven

Values for individual fans - The above datas refer to the max. possible power consumption.

07 230/1/50 1 0,66 2,85 230/1/50 1 1,38 5,9 230/1/50 1 0,44 2,6 10 230/1/50 1 0,66 2,85 230/1/50 1 1,38 5,9 230/1/50 1 0,44 2,6 15 230/1/50 2 0,66 2,85 230/1/50 2 1,38 5,9 230/1/50 2 0,44 2,6 18 230/1/50 2 0,66 2,85 230/1/50 2 1,38 5,9 230/1/50 2 0,44 2,6 20 400/3/50 1 (*) 2,67 4,77 400/3/50 1 (*) 3,63 6,38 400/3/50 1 2,7 4,3 26 400/3/50 1 (*) 2,67 4,77 400/3/50 1 (*) 3,63 6,38 400/3/50 1 2,7 4,3 29 400/3/50 1 (*) 2,67 4,77 400/3/50 1 (*) 3,63 6,38 400/3/50 1 2,7 4,3 39 400/3/50 1 (*) 4,74 8,31 400/3/50 1 (*) 6,42 11,08 400/3/50 2 2,7 4,3 30 400/3/50 1 (*) 4,74 8,31 400/3/50 1 (*) 6,42 11,08 400/3/50 2 2,7 4,3 40 400/3/50 1 (*) 4,74 8,31 400/3/50 1 (*) 6,42 11,08 400/3/50 2 2,7 4,3 50 400/3/50 1 (*) 4,74 8,31 400/3/50 1 (*) 6,42 11,08 400/3/50 2 2,7 4,3 55 400/3/50 1 (*) 8,61 14,66 400/3/50 1 (*) 10,45 18,7 400/3/50 3 2,7 4,3 60 400/3/50 1 (*) 8,61 14,66 400/3/50 1 (*) 10,45 18,7 400/3/50 3 2,7 4,3 70 400/3/50 1 (*) 8,61 14,66 400/3/50 1 (*) 10,45 18,7 400/3/50 3 2,7 4,3 80 --------400/3/50 3 2,7 4,3 90 --------400/3/50 3 2,7 4,3

STD Centrifugal Fans HP Centrifugal Fans EC Radial Fans

Mod V/ph/Hz n° kW FLA(A) V/ph/Hz n° kW FLA(A) V/ph/Hz n° kW FLA(A)

07 - 10 230/1/50 2 4 17,4 230/1/50 3 6 26,1 15 - 18 230/1/50 2 8 34,8 400/3/50 3 12 17,34

20 - 26 - 29 400/3/50 3 9 12,9 400/3/50 5 15 21,5

39 - 30 - 40 - 50 400/3/50 5 15 21,5 400/3/50 6 18 25,8

55 - 60 - 70 400/3/50 6 18 25,8 400/3/50 9 27 38,7

80 - 90 400/3/50 6 18 25,8 400/3/50 9 27 38,7

STD Electric Heaters 3 steps Enhanced Electrical Heaters

Mod. V/ph/Hz n° kW FLA(A) V/ph/Hz n° kW FLA(A)

The above datas refer to the max. possible power consumption.

Values for individual fans

kW = Kilowatt absorbed FLA = Max current LRA = Locked rotor current

The above datas refer to the max. possible power consumption.

07 - 10 230/1/50 1 3 2,25 9,8 15 - 18 400/3/50 1 5 3,75 5,5

20 - 26 - 29 400/3/50 1 5 3,75 5,5

39 - 30 - 40 -5 0 400/3/50 1 5 3,75 5,5

55 - 60 - 70 400/3/50 1 8 6 8,7

80 - 90 400/3/50 1 8 6 8,7

Modulating Humidifier

Mod. V/ph/Hz n° kg/h kW FLA(A)

The above datas refer to the max. possible power consumption.

English 05/09ACCURATE AX - AW - AD - AT - AF

It must be stressed that both the standard air-cooled condensers and dry coolers supplied by the manufacturer are not fitted as standard with the condenser fan speed controller, and are only electrically connected to the disconnect switch for local maintenance operations (for further details, see the manual on the outdoor air-cooled condensers and dry coolers). Therefore, both of these outdoor units can be powered directly via the disconnect switch with primary voltage, however this means their operation is not controlled. If the indoor units used are the ACCURATE in MODULATING version, complete with condenser fan speed controller, the outdoor air-cooled condenser and/or dry cooler can be connected/powered directly from the panel on the indoor unit (the connection cable is not supplied by the manufacturer).

The instructions on the connection and the size of the power cables are provided by the manufacturer on the wiring diagram on the indoor unit. For both single and dual circuit models, just one connection/power cable is required between the indoor and outdoor unit. The voltage delivered will be modulated by the condenser control unit installed on the indoor unit, based on the current requirements of the system. This ensures optimum operating conditions. The condenser control unit is also featured as standard on the versions of the indoor units for low outside temperatures (45°C). There are two types of speed controllers used, based on the size in question. Both are positioned and installed on the indoor unit refrigerant circuit.

ELECTRICAL CONNECTION OF THE OUTDOOR AIR-COOLED CONDENSER BRC AND/OR THE OUTDOOR DRY COOLER BDC

AIU

The ACCURATE units are provided , for MODULATING version, with fan speed control for condensing unit (BRC) or Dry Cooler (BDC), in order to maintain the condensing pressures within pre-

fixed values, for any given load on the unit, whilst at the same time reducing power consumption and noise levels of the fan motors.

2 .giF

1) Frames 1 e 2 type AX - AW (models 07-10-15-18)

FAN SPEED REGULATOR CONDENSING CONTROL

AIU

The ACCURATE type AX e AW for models 07-10-15-18 the regulator direct mounting via pressure connection or indirect mounting on housing bracket with capillary tube on discharge gas tube. The regulator is factory set to a specific pressure (see tab.1 ). If adjustment is needed, refer to instructions for proper procedure. Improper adjustment may result in system damage or failure.

If desired set point differs from factory setting, follow the procedure for setting before any installation:

1) Remove sealing plug and insert 2mm or 5/64" allen key into setting screw.Turn allen key clockwise (+) or counterclockwise (-) to readjust the setting (see Fig. 2).

• Do not exceed safe working pressure.

• Do not touch housing if speed control is working because there might be high temperatures.

• Do not turn setting screw more than 3 turns clockwise (+3).

2) After adjustment insert sealing plug and make sure that it is properly fitted. IP65 protection requires firmly sealed plug.

Note: Partial voltage is applied even if motor is not running. Disconnect voltage for service on motor or on regulator.

FACTORY SET Refrigerants R407C R410A Cond. temp.°C 42 36

44 English 05/09 ACCURATE AX - AW - AD - AT - AF

2) Frames 3-4-5-6 type AX- AD e AW- AT

(models 20-26-29-30-39-40-50-55-60-70-80-90)

For models in air cooled version AX - AD and water cooled version AW - AT the regulator installed is with pressure trasducer type direct mounting via pressure connection on discharge gas tube. The regulator is installed in electrical panel. The regulator is factory set to a specific pressure (see tab.2 ). If adjustment is needed, refer to graphic of tab.2, operating on trimmer V2 – P1 – P2. Improper adjustment may result in system damage or failure.

Power connection

230V +10 - 15% 50/60Hz

JUMPERS

V R M M c a r d

FUSE

M 1

NN U L

COMMAND TERMINALS

P1/V1 TRIMMER

V2 TRIMMER

P2 TRIMMER

POWER ON LED

For Free Cooling units water cooled version AF linked with external Dry Cooler, the regulator installed is with temperature probe type that it is have to be insert in the condensing water inlet pipe by mean wellfastening joint .

The regulator is installed in electrical panel.

The regulator is factory set to a specific condensing water temperature (see tab.3 ). If adjustment is needed, refer to graphic of tab.3, operating on trimmer T1 – T2 – ∆. Improper adjustment may result in system damage or failure.

Power connection

230V +10 - 15% 50/60Hz

JUMPERS

V R M M c a r d

FUSE

M 1

N U

COMMAND TERMINALS

TRIMMER

POWER ON LED

. .

Ta b .2

Master mode Commands connections and settings

G N D

S T A R T

M A X

+ 5 V =

0 V

IN 1

IN 2

probe

=Jumperclosed

0....34,R407C

R407C R410A

R410A

5bar =

= Jumper open

0....45bar =

50%

16 21 P1 P2

Regulation

zone

Pressure(bar)

100%

Speed Voltage (%)

50%

23 32 P1 P2

Regulation

zone

Pressure(bar)

100%

Speed Voltage (%)

BP2

BP1

Master mode Commands connections and settings

35 41

Regulation

zone

Temperature

(C°)

100%

Speed Voltage (%)

T1 = 35°C T2 = 6°C

= 6°C

Regulation

zone

Temperature

(C°)

100%

Speed Voltage (%)

G N D

S T A R T

SET T1/T2 +10 V

0 V

IN 1

probe NTC

NTC probe (25°C = 10 Kohm)

=Jumperclosed = Jumper open

Ta b .3

In some applications, where is required a second set point, is possible to switch from NORMAL (T1) to WINTER (T2) set point, by mean the contact SET T1/T2 connected with the right terminal strips on the electrical panel of internal unit. (see the electrical diagram supplied with the unit).

English 05/09ACCURATE AX - AW - AD - AT - AF

VACUUM AND CHARGE

AIU

The refrigerant circuits of the water-cooled chillers and air-conditioners are already charged with refrigerant, either R407C or R410A (check the rating plate on the unit and the compressors to see which type of refrigerant is used). The air-cooled air-conditioners (AX-AD) and the BRC units that

require refrigerant connections to other units are pre-charged with nitrogen (or dry air) to prevent moisture from entering the circuit; in this case, the refrigerant charge must be completed by the installer, following the instructions shown in this paragraph.

Refrigerant (*) Type of oil

R407C / R410A (POE) Mobil EAL Arctic 22 CC ICI EMKARATE RL 32S CF

COMMISSIONING PROCEDURE Arm the cutout in the auxiliary circuits; Arm all the cutouts on the electrical panel;

Power up the air-conditioner electrical panel and close the main disconnecting switch on the unit (position 'I'); Check that the control board is powered; Check that both the LEDs relating to the phase sequence relay (RSF) are on; the yellow LED indicates power, the green LED indicates that the sequence of phases is correct. If the green LED is off, disconnect power supply from the units, reverse two phases of the power cable and restart the commissioning procedure. (In the units with sump heaters) After having powered up the air-conditioner, wait at least 12 hours before starting so as to suitably heat the oil in the compressors. During extended shutdown there may be spontaneous migration of refrigerant to the compressor sump, which at the start may cause the oil to foam and consequent damage due to insufficient lubrication. As a result, do not disconnect power during weekly pauses; Open the on-off valves in the refrigerant circuits and check that the air-cooled remote condensers are connected (air-cooled models); Check that the external radiators are connected and make sure there is water flow for cooling (water-cooled models); Check that the sections of corrugated pipe with the function of drain trap (both inside and outside of the air-conditioner) have been filled with water during installation.

AT LEAST 12 HOURS AFTER POWER UP: Start the air-conditioner using the buttons on the user terminal; If an alarm is activated refer to the controller instruction

manual.

Open any valves in the unit or in the system to ensure that all the components are involved in the emptying operation;

Connect a high efficiency vacuum pump to the Schrader fittings or to the 1/4" SAE fittings on the compressor suction and discharge side;

Connect a cylinder of refrigerant to the charge fittings.

Empty the lines, ensuring an absolute pressure of less than 10 Pa (0.07 mm Hg) so as to remove the air and any traces of moisture

The circuit should be emptied slowly and maintained for an extended period, rather than performed too quickly. Wait a "go up time" of 100 seconds and verify that the pressure does not exceed over 200 Pa absolute.

In general, if there is the chance of significant moisture content in the circuit or for very large systems, the vacuum must be “broken” with nitrogen dioxide and then repeat the emptying operations as described.

Break the vacuum by pre-charging from the cylinder of refrigerant. After having started the compressor, complete the charge slowly, until the pressure stabilises in the lines and the gas bubbles disappear

from the flow indicator; The charge must be checked at the environmental design conditions and with a discharge pressure of around 18 bar (equal to a dew point of 48°C

and boiling point of 43°C); for units with on-off condenser control, partially close the intake to stop the condenser fan from repeatedly starting-stopping. Make sure that the subcooling of the liquid at the thermostatic valve intake is between 3 and 5°C less than the condensing temperature read on the pressure gauge and that the superheating of the vapour at the evaporator outlet is around 5 °C.

(*) recommended with COPELAND compressors. If a circuit already charged with refrigerant needs to be emptied, the first operation required is the removal of the refrigerant from the circuit using a special appliance with dry compressor for recovering the refrigerant. If available, also switch on the sump heaters during the emptying operation.

R407C / R410A

46 English 05/09 ACCURATE AX - AW - AD - AT - AF

CALIBRATING THE THERMOSTATIC VALVE (air-cooled models)

The thermostatic valve is calibrated using the adjustment screw shown in the figure; in the water-cooled models, the correct calibration is already performed in the factory.

• Check that the subcooling of the liquid at the condenser outlet is around 3-5°C;

• Check that the thermostatic valve superheating value is correct (around 5 °C);

• Check that the valve sensor bulb is correctly positioned, secured and insulated.

If the superheating is above the value indicated previously, open the valve further; if it is lower, close the valve further.

NOTE: the thermostatic valve must only be calibrated by specialist personne

OPERATION AND CONTROL

AIU

WATER-COOLED UNITS

Water in an open circuit

If the temperature of the cooling water is not controlled and may fall below 25°C, a pressure control valve is required (available as an accessory) for each condenser; in this case, the supply pressure must not be less than 200 kPa (2 bar). IMPORTANT: do not use water cooled using an evaporative tower, as the condensers will rapidly become fouled by lime scale.

Water in a closed circuit

The condensers on the units are supplied with water pumped in a closed circuit and cooled by external radiators; check that the crosssection of the pipes and that the characteristics of the circulating pump are suitable: an insufficient water flow-rate affects the performance of the air-conditioner. The temperature of the cooling water must be controlled so as to not fall below 25°C, preferably according to the diagram shown in the figure.

IMPORTANT: the cooling water must contain a percentage of ethylene glycol (passivated and consequently non-corrosive) according to the minimum expected outside temperature. In the Energy Saving models, the use of glycol is always required.

25 °C

adjustment screw

English 05/09ACCURATE AX - AW - AD - AT - AF

The centrifugal fans are with double suction, and they are installed in the units DX mod. 07-10-15-18 and CW mod. 07-09-14-19, supplied with exernal rotor motor directly bolted, single phase type with 3 speed regulations. Following the electrical diagramm, included in the unit, is possible to change the fan speed in order to have different ESP:

STD Motor 6P 280W HP Motor 4P 550W

ESP 20 Pa 150 Pa 300 Pa Mod. 07-10 MAX Speed MED Speed MAX Speed Mod. 15-18 MAX Speed MED Speed MAX Speed

CENTRIFUGAL FANS REGULATION (frame 1 - 2)

AIU

TIGHTENING THE DRIVE BELTS

AIU

In the versions from frame 3 upwards, the fans in the standard version are centrifugal with forward blades and belt drive. A required periodical maintenance operation (at least once a year) involves having specialist personnel check the correct tension of the belt. To check the tension, proceed as follows: apply a perpendicular force of around 20 N (2 kg) to the centre of the belt (between the 2 pulleys). The belt must have a deformation of around 6-8 mm. If this is not the case, adjust the tension using the worm screw located on the slide that supports the electric motor. Overly tight belts will cause unbalanced transmission. Too loose belts, on the other hand, will cause the motor to overheat and excessive power consumption.

DRIVE PULLEYS

Below is a description of how to assemble and dismantle the pulleys if these require replacement or repair.

Dismantling (see fig.A)

- Take out the 2 safety screws

- Insert one of screws (1) in the estracting hole (2) to remove the pulley from the elastic ring

Assembly (See Fig. B) Slide the elastic ring onto the motor pin. Insert the pulley on top, then tighten the fastening screws (1)

6-8mm

20N

48 English 05/09 ACCURATE AX - AW - AD - AT - AF

The pressure test points for the air flow (F3) and dirty filter (F4) differential pressure switches are connected in parallel; (on OVER units)

- the positive pressure test point is located on the right-hand side of the base of the unit;

- the negative pressure test point is located in a position for measuring the pressure upstream of the fan; (on UNDER units)

- the positive pressure test point is located behind the electrical panel, upstream of the air filter;

- the negative pressure test point is located in a position for measuring the pressure upstream of the fan;

Pressure test point

RIGHT-HAND SIDE

FRONT OF THE UNIT

Q.E.

INSTRUMENTS AND ALARMS

AIU

The air-conditioner is fitted with the following instruments:

- High pressure switch/switches F1 with manual reset (one on each refrigerant circuit);

- Low pressure switch/switches F2 with automatic reset (one on each refrigerant circuit);

- Air flow sensor F3 and dirty filter sensor F4 (differential pressure switches);

- Temperature sensor BT2 (versions C and T) or room temperature and humidity sensor BH1 (on the units with humidity control);

Some versions, in addition, have the following sensors:

- Safety thermostat TH1 (in the versions with electric heaters), with the reset button accessible on the right-hand side of the electrical panel.

In addition, the following optional devices may be available:

- Flood sensor made up of: a) FSD device to be inserted in the special socket on the elec-

trical panel;

b) FLOE sensor (or sensors, connected in parallel) to be posi-

tioned at the points monitored;

- Fire and smoke sensors SFFS and SFFF;

- Hot water temperature sensor, for reading and enabling post-heating with hot water;

- Outlet air limit temperature sensor (BT1), installed as described in the "Installation manual".

1 main board 2 disconnecting switch 3 electric heaters 4 radial fan and inverter 5 compressor 6 dewatering filter 7 liquid valve 8 flow indicator 9 thermostatic valve 10 humidifier 11 dehumidification valve 12 hot water coil valve 13 temperature-humidity probe

English 05/09ACCURATE AX - AW - AD - AT - AF

CALIBRATING THE CONTROL AND SAFETY DEVICES

AIU

After starting the air-conditioner, make the following adjustments

- Room temperature (cooling and heating set point).

- Relative humidity (set point for humidification and dehumidification);

- Dirty filter differential pressure switch: see the paragraph on "CALIBRATING THE DIRTY FILTER SENSOR".

The calibration values of the control and safety devices must not be altered.

Symbol Description

F1 High pressure switch F2 Low pressure switch

TH1 Safety thermostat (versions T and H)

Symbol Activation Differential Reset

F1 28 bar (opening) - Manual reset F2 1,5 bar (opening) 1.5 bar 2.5 bar (automatic)

TH1 320 °C (opening) - Manual reset

50 English 05/09 ACCURATE AX - AW - AD - AT - AF

CALIBRATING THE AIR FLOW SENSOR

AIU

The differential pressure switch F3 must be activated if the fan is not working (when there is one fan) or one of the fans is not working. The factory calibration of the differential pressure switch to control the air flow (F3) is 0.5 mbar (=50Pa). As the difference in pressure between the fan intake and outlet depends on the air flow-rate, the instrument may need to be recalibrated after installation, checking that the contact closes when the fan is operating normally.

To calibrate the pressure switch:

• simulate a fault in the fan system (stop the fan - if there is just one - or one of the fans on the unit) and check that the pressure switch is activated;

• if the device is not activated, progressively increase the calibration value of the pressure switch.

To calibrate the pressure switch, remove the plastic cover (A) by unscrewing the two screws (B). Use the adjustment screw (E) to calibrate the differential pressure switch on a scale from 0.5 to 4.0 mbar (50 to 400Pa). If having to replace the pressure switch, unscrew the two fastening screws (D), remove the rubber hoses connected to the pressure test points (+) and (-) and remove the electrical cables connected to terminals 1, 2 and 3. To install the new pressure switch, perform the same operations in the reverse order, inserting the cables from point (C).

mbar

CALIBRATING THE DIRTY FILTER SENSOR

AIU

The factory calibration of pressure switch F4 is 3 mbar (=300Pa). Pressure switch F4 must be calibrated according to the pressure drop, which depends not only on the filter being dirty, but also on the air flow-rate.

The calibration must be performed with a clean filter, as follows:

- switch the unit on

- progressively cover the surface of the air filter and make sure

that the pressure switch is activated when around 50-60% covered;

- if the device is not activated, progressively reduce the calibra-

tion of the pressure switch;

- if the device is activated too early, increase the calibration.

Pressure test points

CALIBRATING THE PRESSURE CONTROL VALVE

AIU

(option available for water-cooled models)

The pressure control valve, by managing the flow of water, prevents the condensing pressure from lowering excessively and, at the same time, saves water consumption. If necessary, calibrate the pressure control valve using the adjustment knob (the pressure is increased when turning clockwise) until the condensing pressure stabilises at the recommended value of 18 bar (equivalent to a satured temperature of around 45°C when using di R407C) and 27 bar (equivalent to a satured temperature of around 45°C when using di R410A), measured using a pressure gauge connected to the pressure test point on the outlet valve.

1 2 3 4 5

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WARNING: Disconnect power before working on the servomotor

On the controllers units ACCURATE the position of the servo- motor is proportional to the control voltage, between 0 and 10 Vdc. The servomotor stops:

- automatically at the end of its travel;

- in the position of equilibrium, corresponding to the control voltage;

- in the current position, when cutting off power.

OPERATION OF THE MVX52 - 0÷10V SERVOMOTORS

The opening of the valve can be controlled by checking the position using the indicator located on the top of the servomotor

EMERGENCY MANUAL OPERATION

The valve can be operated manually, in the event of faults to the servomotor or the control system, using the manual control knob (not supplied).

TEMPERATURE AND HUMIDITY PROBE

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The figure shows the optional temperature and humidity probe. If having to replace the probe, release the white plastic cover by pressing point (A) with a screwdriver or a pointed object; lift the cover (B) to access the fastening screws (C) and the terminals (D).

For the probe electrical connection use a shielded cable; the connections to the terminals on the board are shown on the wiring diagram.

126 mm

TUO

Shielded cable inlet

Fastening holes

SERVOMOTOR AND WATER VALVE

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OUT

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Type Rated voltage

Run time at Control

50 Hz signal

SSB81 AC 24 V 150 s 3-position SSB61 AC/DC 24 V 75 s DC 0...10 V

Description

This actuator with 3point or 0÷10V signal is adapt for 2 or 3 way valve with 5,5mm stroke

Function

When the actuator is driven by DC 0…10 V control voltage or by a 3-position signal, it produces a stroke which is transmitted to the valve stem. The description of operation in this document applies to the valve versions which are fully closed when deenergized (NC).

3-position control signal SSB81

• Voltage at Y1: Stem extends Valve opens

• Voltage at Y2: Stem retracts Valve closes

• No voltage at Y1 and Y2: Actuator maintains its current position.

DC 0...10 V control signal SSB61

• The valve opens / closes in proportion to the control signal at Y.

• At DC 0 V, the valve is fully closed (A ? AB).

• When power supply is removed, the actuator maintains its cur-

rent position.

Operation

A 3 mm hexagonal socket wrench can be used to move the actuator to any position between 0 and 1. If a control signal from the controller is present, then this takes priority in determining the position.

Manual override

Maintenance

The actuators are maintenance-free. When carrying out service work on the plant, following must be noted:

• If necessary, disconnect electrical connections from the terminals!

• The actuator must be commissioned only with a correctly mounted valve in place!

Repair

SSB... actuators cannot be repaired; the complete unit must be replaced.

B (Y,Y2)

(Y, Y1) A

3 mm

4891Z13

Position indicator in

position 0:

Valve closed

4891Z14

Position indicator in

position 1:

Valve open

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Type Rated voltage

Run time at Control

50 Hz signal

SSC819 AC 24 V 150 s 3-position SSC619 AC/DC 24 V 30 s DC 0...10 V

Description

This actuator with 3point or 0÷10V signal is adapt for 2 or 3 way valve with 5,5mm stroke

Function

When the actuator is driven by a 3-position or DC 0…10 V control signal, it generates a stroke which is transmitted to the valve stem.

3-position actuators SSC819

• Voltage at Y1: Actuator stem extends and valve opens

• Voltage at Y2: Actuator stem retracts and valve closes

• No voltage at Y1 or Y2: Actuator maintains the current position

DC 0...10 V control - SSC619

• The valve opens / closes in proportion to the control signal at Y

• At DC 0 V, the valve is fully closed

• In the event of a power failure, the actuator maintains its cur-

rent position

Auto calibration - SSC619

When the AC / DC 24 V supply is applied for the first time, the actuators calibrate themselves independent of the control signal. In this process, the actuator drives the valve to the mechanical end stops and stores the associated positions permanently in the form of electronic values. The positioning signal is only active on completion of this calibration process. Calibration takes about 60 seconds.

Manual override

The rotary knob can be used to drive the actuator into any position between 0 and 1. However, if a control signal from the controller is present, this will take priority in determining the position.

Maintenance

When servicing the actuator:

• Switch off power

• If necessary, disconnect the terminals

• The actuator must only be commissioned with a correctly mounted valve in place!

Repair

The SSC... actuators cannot be repaired. They must be replaced as a complete unit.

(Y2)(Y, Y1)

Position indicator in

position 1 = OPEN

Position indicator in

position 0 = CLOSED

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4 5

SQX82... 3-position positioning signal

• Voltage on Y1: actuator stem extends, valve opens

• Voltage on Y2: actuator stem retracts, valve closes

• No voltage on Y1 and Y2: actuator stem remains in the respective position

Description

This actuator with 3point or 0÷10V signal is adapt for 2 or 3 way valve with 20mm stroke

Calibration SQX62

The minimum stroke of the valve is 15 mm. The LED does not indicate a calibration error when the stroke is < 15 mm The stem extends to the maximum position with the maximum positioning signal DC 10 V.

A flashing red LED indicates a calibration error.

SQX62... Y, R signals: DC 0...10 V

The SQX62 is either controlled via terminals Y and/or R.The recorded positioning signals control the synchronous motor by means of microprocessor electronics.

• Signal Y, R increasing: actuator stem extends, valve opens

• Signal Y, R decreasing: actuator stem retracts, valve closes

• Signal Y, R constant: actuator stem remains in the respective position

SQX82: SQX62:

1 Terminal strip 2 Button S3 (calibration)

3 LED, red / green (operating status indication) 4 Terminal strip 5 DIL switches:

switch S1: change-over flow characteristic «LOG» / «LIN» *) switch S2: change-over signal R «0-10 V, 4-20 mA» / «1000 Ω» *)

(*) bold print = factory setting

Calibration

1. Pressing button S3 starts calibration

2. Actuator moves to «0 %» stroke position (valve closed) green LED flashes

3. Actuator moves to «100 %» stroke position (valve open)

4. Measured values saved in microprocessor

Normal operation

5. Actuator moves to the position as indicated by signals Y or R green LED is lit permanently

Indication of operating state SQX62

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2 WAY VALVE CLOSE-OFF

FRAME MODEL AT/AD Actuator (6) Valve model KVS close off* (kPa)

320SSC VXP 10 300

26 SSC VXP 10 300 29 SSC VXP 10 300

439SSC VXP 16 175

30 SSC VXP 16 175 40 SSC VXP 16 175 50 SSC VXP 16 175

560SSC VXP 25 75

70 SSC VXP 25 75

680SSC VXP 25 75

90 SSC VXP 25 75

LED Indication Function Remarks, troubleshooting Green Lit Control mode Automatic operation; everything o.k.

Flashing Calibration Wait until calibration is finished

(green or red LED will be lit)

Red Lit Internal error Troubleshooting, eventually replace actuator

Flashing Calibration error Troubleshooting, recalibrate

(operate button S3 1x)

Both Dark No power supply Check mains network, check wiring

Electronics faulty Replace actuator

2 WAY VALVE CLOSE-OFF

For applications where the 2 way valve is needed, verify the Close Off value in table below if they are suitable with the system. For different

value, make specific request.

*close off = Maximum permissible differential pressure at which the motorised valve will close securely against the pressure

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ELECTRIC HEATERS

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ELECTRIC HEATERS

The overall power of the electric heaters is divided into a number of elements, each with a power of 2/3/4 kW. The colour of the wires on each element has the following meaning:

• BLACK wire = low power element (0.7/1/1.3 kW);

• WHITE wire = high power element (1.3/2/2.7 kW);

• RED wire = common. The wires for each element are connected to contactors M5 and KM6 on the electrical panel so as to balance the load between the phases and create three stages of power (see the wiring diagrams on the unit).

If having to replace the electric heaters, disconnect power to the air-conditioner and wait until the heating elements have cooled down. After having replaced the heaters, make sure the earth is connected.

HUMIDIFIER

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SYSTEM COMPONENTS

Upon request, the air-conditioning unit can be fitted with an immersed electrode humidifier (versions D and H).

1 Humidifier interface board: A3; (inside the electrical panel). 2 Current transformer TA1 (inside the electrical panel) for

measuring the current input of the steam cylinder. 3 Water fill tank. 4 High water level electrodes in the steam cylinder. 5 Overflow pipe (BEHIND THE CYLINDER). 6 Boiler cylinder (or steam cylinder). 7 Water fill solenoid valve: YV1. 8 Cylinder drain solenoid valve:YV2. 9 Microprocessor control board:A1. 10 Temperature and humidity probe: BH1.

9. B1

2. TA1

8.YV2

7. YV1

1. A3

10. BH1

KM4

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HUMIDIFIER OPERATING PRINCIPLE

In the immersed electrode humidifier, the current that runs between the electrodes, through the water contained in the boiler cylinder, generates the heat required to boil the water. By controlling the level of the water and the concentration of salts inside the steam cylinder (6) using the fill (7) and drain (8) solenoid valves, the amount of current delivered can be regulated, and measured using a current transformer (2). When steam production is required, the humidifier contactor CU closes (see the wiring diagram) so as to supply power to the immersed electrodes. When the current falls below the set value due to the lowering of the water level, the fill valve (7) is opened. The drain valve (8) is activated cyclically, depending on the characteristics of the supply water, so as to maintain the optimum salt concentration inside the cylinder (6). The only periodical maintenance operations required are the inspection and cleaning of the parts in the steam production unit. The operations indicated below should be performed annually, preferably before shutting down the unit in summer.

STEAM CYLINDER

The steam cylinder requires periodical cleaning to remove the scale deposits that form on the surface of the electrodes and the flakes that deposit on the filter at the base of the cylinder. To remove the cylinder, proceed as follows:

• completely drain the water from the boiler; to do this, see the paragraph “MANUAL CONTROL” in the EVOLUZIONE controller instruction manual;

• disconnect the power supply by opening the main switch on the electrical panel;

• remove, from the top of the cylinder, the hose that carries the steam to the distributor;

• disconnect the power connections by unscrewing the knobs on the cable ends and remove the plugs from the level electrodes;

• release the strap that secures the cylinder to the unit;

• slide the cylinder out upwards.

The steam cylinder can be reused a number of times after cleaning the electrodes: if, however, the wear on the grills of electrodes is such that these cannot be regenerated, they must be replaced. The only spare part is the complete cylinder body (with filter included).

FILL AND DRAIN ASSEMBLIES

To ensure the correct operation of the humidifier, the supply/fill and drain assemblies need to be inspected periodically. Proceed as follows:

- completely drain the water from the boiler using the MANUAL CONTROLS on the controller A1;

- disconnect the power supply by opening the main switch on the electrical panel;

- remove the fill pipe from the 3/4 GAS fitting on the fill solenoid valve;

- remove and clean the filter located inside the solenoid valve fitting;

- dismantle the drain assembly (shown in Figure 13), clean the pipes and remove any flakes of scale from the cup-drain trap.

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HUMIDIFIER POWER SUPPLY

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Underneath the fill solenoid valve on the steam production unit is the threaded male fitting (V) for the humidifier water supply. This is already fitted with a plastic hose, diameter 6 mm, for connection to the building's water supply (see figure, point F).

V: Steam production unit - inlet connection (threaded male fit-

ting 3/4”G);

F: Rubber hose, diameter: Ø 6mm.

To supply the humidifier, use drinking water without any chemical treatment or demineralisation. The characteristics of the water that supplies the humidifier must be within the following values:

position: V-F

IN 3/4”G Ø 6mm

OUT Ø 32mm

HUMIDIFIER AND CONDENSATE DRAIN

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Underneath the drain solenoid valve on the steam production unit is an attachment for draining the water. This is already fitted with a hose coupling for connecting the hose running to the sewerage system in the building. A rubber or plastic hose should be used, resistant to 100°C, with an inside diameter of 32 mm. Fit a trap in the section of the hose outside of the unit to avoid bad odours and to prevent water from overflowing from the humidifier pan. During installation, pour water into the condensate collection pan and the humidifier pan, so as to fill the drain traps outside and inside the unit with water. Downstream of the drain trap ensure a minimum slope of 1%.

WARNING: the water exiting the steam cylinder is very hot. The humidifier drain hose must not be fastened to electrical cables and must run down vertically so as to avoid any contact with these cables.

CONDENSATE DRAIN PUMP AND HUMIDIFIER DRAIN PUMP

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Depending on the version, a condensate drain pump is available (for versions B and R) or a humidifier drain pump (for versions H and T) with mechanical features such as to be able to resist the high temperatures of the water exiting the steam cylinder.

The pump must be located below the drain fitting, according to the instructions contained in the packaging. Check that the head is sufficient to lift the condensate to the point of drainage.

(

) Values depending on specific conductivity; in general: TDS ≅ 0,93 * σ20; R180 ≅ 0,65 * σ20

(2) not lower than 200% of the chloride content in mg/l of Cl

(3) not lower than 300% of the chloride content in mg/l ofCl

Characteristic water supply

LIMITS

Min Max

Mains pressure bar 1 8 Hydrogen ions pH - 7 8,5 Specific conductivity at 20°C σR, 20 °C - µS/cm 300 1250 Total dissolved solids TDS - mg/l (1)(

)

Dry residue at 180°C R180 - mg/l (1)(

) Total hardness TH - mg/l CaCO3 100(2) 400 Temporary hardness - mg/l CaCO3 60(3) 300 Iron + Manganese - mg/l Fe + Mn 0 0,2 Chlorides - ppm Cl 0 30 Silica - mg/l SiO2 020 Residual chlorine - mg/l Cl

0 0,2 Calcium sulphateo - mg/l CaSO4 0 100 Metallic impurities - mg/l 0 0 Solvents, diluents, soaps, lubricants - mg/l 0 0

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MAINTENANCE

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Every components replacement (compressor, safety pressostat, liquid receiver, ecc.) have to consider the main component list enclosed in the unit.

This section, aimed above all for the end user, is extremely important for the correct operation of the appliance. Just a few operations completed scrupulously and regularly will avoid serious damage to the components. Only authorized and specialist personnel can operate into the units. The maintenance operations can be summarised as follows:

- Clean the air filter.

- Check and clean the condenser coils

- Check the water-cooled condensers for fouling.

- Check and clean the drains.

- Check the drive belts.

- Check the humidification system.

- General examination of the overall operation of the appliance.

- Visual check of the condition of the pressurised containers.

Cleaning the air filter

The gradual fouling of the filters reduces the flow-rate of the conditioned air, with a consequent reduction in cooling capacity. In the direct expansion units, a reduction in the air flow-rate may cause the activation of the low pressure switch and/or cause serious damage to the compressor. This can be avoided by the periodical cleaning of the filters. The frequency at which the filters must be checked exclusively depends on the amount of dust in the environment. In any case, the following are recommended:

- Every week check that the filters are clean

- Every two weeks clean the filters with a vacuum cleaner

- Every month wash the filters with soapy water

- Every 6 months replace the filters. It is clear that the recommended times are purely indicative, and in some cases it may be necessary to increase the frequency of the checks and maintenance operations. These operations must be carried out with the unit off and after having made sure that the appliance is disconnected from the power supply.

Checking and cleaning the condenser coils

In the hotter period, when the unit operates at maximum capacity, the condensing coils must be able to offer the maximum heat exchange. Normally installed outside or communicating with the outside, these may pick up dirt such as paper, dry leaves and dust, thus reducing the heat exchange. Make sure that this situation does not arise. Failure to perform maintenance will cause the activation of the high pressure switch and the unit to shutdown. Frequently check the condition of the heat exchanger during the poplar pollination period or the autumn (falling leaves). Remove any objects accumulated on the coil and wash with a jet of water. These operations must be carried out with the unit off and after having made sure that the appliance is disconnected from the power supply.

Checking the water-cooled condensers for fouling

To check the water-cooled condensers for fouling, simply check the water inlet and outlet temperature and compare it against the condensing temperature. Normally, for good heat exchange, the difference between the water outlet temperature and the condensing temperature must be 5.8°C. Increases in these values, over time, indicate a reduction in efficiency and consequently the fouling of the condenser. The condenser is cleaned by chemical washing and must be performed by specialist personnel. This operation must be carried out with the unit off and after having made sure that the appliance is disconnected from the power supply).

Checking and cleaning the drains

All the water drains (humidifier and condensate) must ensure perfect drainage, to avoid flooding in the room. When the humidifiers drain the water, they discharge a quantity of lime scale that depends on the hardness of the supply water. This lime scale may accumulate in the bottom of the drain hose and block the flow of water. If cleaning is required, add ordinary descaler to the section of circuit involved. This operation must be carried out with the unit off and after having made sure that the appliance is disconnected from the power supply.

Checking the drive belt

On the units with fans coupled to the electric motor by pulleys and drive belts, after a certain number of operating hours the belt may become loose, sliding on the pulleys and causing excessive wear. This situation, if it persists, causes overheating and consequently the breakage of the belt. Loosening can be resolved using the special belt tightener fitted on the appliance (this operation must be carried out with the unit off and after having made sure that the appliance is disconnected from the power supply). Check the tension of the drive belts once a month. Avoid excessively tightening the belts, as this may cause damage to the bearings.

General examination of operation

This is a general examination aimed at comparing the operation of the appliance with the last check performed. Consequently, any differences in the operating characteristics over time can be highlighted. A detailed and periodical visual check of the appliance and general cleaning are always important to ensure correct operation. The above-mentioned operations can in general be performed once a month. Naturally, in special situations and specific installations the frequency may change. A well maintained system is unlikely to cause disruptions and stoppages to the production cycles. After 10 years working a complete checking is recommended.

Visual check of the condition of the pressurised containers

Check the condition of the pressurised containers at least once a year (if these are fitted). It is very important to check that rust does not form on the surface, that there is no corrosion and that there are no visible deformations. If not controlled and stopped, surface oxidation and corrosion will over time cause a decrease in the thickness of the container and a consequent reduction in its mechanical strength. Protect with paint and/or corrosion proofing products. In the event of visible deformations, stop the unit and contact the nearest service centre.

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DISMANTLING

IMPORTANT INFORMATIONS FOR CORRECT DISMANTLING OF THE UNIT ACCORDING TO CE 2002/96/CE

If the unit has to be dismantled, this operation must be done by suitable local authority. The correct dismantling avoids any negative enviromental consequences and allows significant benefits in terms of energy saving and resource. The necessity to a correct dismantling is signed by the label as shown on side.

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TROUBLESHOOTING

AIU

Troubleshooting is simplified by the information provided by the microprocessor controller: if an alarm is signalled, refer to the control panel instruction manual.

If required, contact the nearest service centre, indicating the probable causes of the fault.

Check for voltage; close the main switch.The electrical panel is not powered

Check that the cutout IM in the auxiliary circuits is armed. Check the fuse on the main board.

The auxiliary circuits are not powered

Check for DC power.

The control panel does not start the air-conditioner.

FAULT CAUSE SOLUTION

THE AIR-CONDITIONER DOESN'T START

See the controller manual.

The parameter settings on the microprocessor controller are not correct.

See “LOW OR NO AIR FLOW”.The air flow-rate is too low or null.

Check the electrical connections and the configuration of the controller.

The probe isn't working.

Check the thermal load in the room being air-conditioned.

Thermal load higher than expected.

See “THE COMPRESSOR/COMPRESSORS DON'T START”.

The compressor/compressors don't start, despite being activated by the controller.

ROOM TEMPERATURE TOO HIGH

See the controller manual.

The parameter settings on the microprocessor controller are not correct.

Check that the heater thermal cutout is armed. Check the power supply to the electric heaters. If the heater safety thermostat is activated, resolve the causes and reset the alarm.

The power of the heaters is not sufficient or the heaters aren't working.

Check the flow-rate and the temperature of the water hot. Check the operation of the control valve and the servomotor.

The hot water coil isn't working correctly.

Check the operation of the hot gas three-way valve; Check the operation of the compressor used for post-heating: in this case, see “THE COMPRESSOR/COMPRESSORS DON'T START”.

The hot gas post-heating system isn't working during the dehumidification plus post-heating phase

ROOM TEMPERATURE TOO LOW

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See the controller manual.

The parameter settings on the microprocessor controller are not correct.

Check and calculate the latent load; check the flow-rate and the conditions of the outside air; check the inflow of outside air.

Latent load higher than expected

See “THE COMPRESSOR/COMPRESSORS DON'T START”.

The compressor isn't working during the dehumidification phase.

Check the operation of the solenoid valve that controls the dehumidification circuit.

The dehumidification valve doesn't close.

See the controller manual; check the operation of the panel and/or the probe.

The control system isn't working.

AMBIENT HUMIDITY TOO HIGH

Check the room temperature setting (see the control panel manual).

The parameter settings on the microprocessor controller are not correct.

Verificare la consistenza del carico latente.Latent load lower than expected.

Check the pressure of the supply water; Check the operation of the manual control system and the steam production unit (see the control panel manual)

The humidifier isn't working.

See the control panel manual; check the operation of the panel and/or the probe.

The control system isn't working.

AMBIENT HUMIDITY TOO LOW

Check the power supply to the fans.The fans are not powered.

Clean the filter using a vacuum cleaner after having shaken off the larger particles of dust. Replace the filter if excessively clogged. Check the correct calibration of the dirty filter differential pressure switch F4.

The filters are blocked (possible activation of the dirty filter alarm).

See the paragraph on AIR DISTRIBUTIONObstructions to the air flow.

Check the resistance of the fan windings; after resetting, measure the voltage and power input.

The fan thermal cutout has tripped.

EC radial fan speed set too low

Check the sizing of the air distribution system (ducting, false-ceiling, underfloor plenum, grills)

Excessive pressure drop in the air distribution system.

LOW OR NO AIR FLOW

FAULT CAUSE SOLUTION

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FAULT CAUSE SOLUTION

See “LOW OR NO AIR FLOW”.Insufficient air flow-rate

Check the continuity of the connection from the safety thermostat to the control system.

Thermostat connection wire cut or broken

Replace the heater safety thermostat.Faulty thermostat

HEATER SAFETY THERMOSTAT ACTIVATED

Empty and recharge the circuit.

A) Air or incondensable gas in the refrigerant circuit, seen by the presence of bubbles, despite measuring a high subcooling.

Check the operation and the correct direction of rotation of the fans on the outdoor heat exchanger. Check that the exchanger is not dirty and remove any material that may be blocking it (leaves, paper, seeds, dust, etc.) with a jet of compressed air or with a brush; Check the outdoor unit for any obstacles to the flow of air and any recirculation of the cooling air; Check that the temperature of the cooling air does not exceed the design value.

B) Insufficient air flow-rate to the remote heat exchanger or air too hot

Check the flow-rate, the pressure and the temperature of the cooling water in the closed circuit; Check the calibration and the operation of the pressure control valve.

Insufficient water flow-rate to the condenser or water too hot.

Remove refrigerant from the circuit.

Excessive refrigerant charge; condenser partially flooded. Excessive subcooling of the liquid at the condenser outlet.

Check the opening of the valves.

Valves on the high pressure side of the circuit partially closed.

HIGH COMPRESSOR DISCHARGE PRESSURE

Check the operation of the condenser fans and the corresponding protection device; repair or replace the faulty fans; Check the calibration and the operation of the remote condenser fan pressure switch or the speed controller. (See CONTROLLING THE CONDENSING PRESSURE)

The condensing pressure control system isn't working.

See “HIGH COMPRESSOR DISCHARGE PRESSURE”.

The system is affected by an excessive discharge pressure

HIGH PRESSURE SWITCH ACTIVATED (high compressor discharge pressure)

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Check the calibration and the operation of the condenser fan pressure switch or the speed controller;

The condensing pressure control system isn't working (see the control panel manual).

Check the temperature of the cooling water; Check the calibration and the operation of the pressure control valve (if fitted); Install a pressure control valve to manage the flow-rate of water according to the condensing pressure.

Excessive water flow-rate to the condenser or water too cold.

See “LOW COMPRESSOR SUCTION PRESSURE”.

Suction pressure too low

LOW COMPRESSOR DISCHARGE PRESSURE

FAULT CAUSE SOLUTION

Check the ambient thermal load; check, above all for intense dehumidification, the flow-rate and the conditions of the outside air; check the inflow of outside air.

Thermal load higher than expected

See “HIGH COMPRESSOR DISCHARGE PRESSURE”.

The system is affected by an excessive discharge pressure

Remove refrigerant from the circuitToo much refrigerant in the circuit.

Check that the thermostatic valve superheating value is correct; check that the valve sensor bulb is not discharged and that it is correctly positioned, secured and insulated”.a

Return of liquid refrigerant to the compressor intake

HIGH COMPRESSOR SUCTION PRESSURE

See “ROOM TEMPERATURE TOO LOW”.Room temperature too low

See “LOW OR NO AIR FLOW”.The air flow-rate is too low or null

Check the opening of the valve.

Liquid receiver outlet valve not completely open

Check that the thermostatic valve superheating value is correct; check that the valve sensor bulb is not discharged and that it is correctly positioned, secured and insulated”.

Refrigerant filter blocked

Check the liquid subcooling at the condenser outlet; if necessary, restore the charge.

Insufficient refrigerant charge

LOW COMPRESSOR SUCTION PRESSURE (and possible defrosting of the coil)

Check that the thermostatic valve superheating value is correct (around 5°C).

Thermostatic valve not correctly calibrated or faulty

Check and if necessary replace the dewatering filter cartridge; the temperature difference measured upstream and downstream of the filter must be less than 2°C.

Dewatering filter cartridge dirty

See “LOW COMPRESSOR DISCHARGE PRESSURE”.

The system is affected by an excessively low discharge pressure

LOW PRESSURE SWITCH ACTIVATED (low compressor suction pressure)

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COD. C01001126H_V1

CLIMAVENETA Accurate AX, Accurate AW, Accurate AT, Accurate AF, Accurate AD Installation Manual - User Maintenance

Specifications and Main Features

Frequently Asked Questions

User Manual