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English 05/09
ACCURATE AX - AW - AD - AT - AF
GENERAL CHARACTERISTICS
A
I
U
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 cor-
rectly 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 over-
load protection and Rotolock fittings (7.5 HP).
Fitted on rubber vibration dampers and complete with oil charge.
FANS
CENTRIFUGAL TYPE
Dual intake centrifugal fans, directly coupled to electric motors
with external impeller positioned in the centre of the fan and sus-
pended 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), invert-
er brushless motor with electronic commutation to get extreme-
ly 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 vol-
ume or ESP.
FILTER
Pleated filters, supported by a frame, with protective metal mesh,
and regenerable polyester fibre filtering media treated with syn-
thetic resins. G4 efficiency according to the CEN-EN 779 stan-
dard with average separation efficiency 90.1% (ASHRAE). The fil-
ter is flame retardant.
AIR HEAT EXCHANGER
Finned coil, large front surface, made from copper tubes expand-
ed mechanically onto aluminium fins with a high heat exchange
surface. Hydrophilic treatment to assist the drainage of conden-
sate. The coil, installed upstream of the fans for perfect air distrib-
ution, 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 inter-
lock 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 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)
