General Characteristics - CLIMAVENETA accurate ax Installation - User - Maintenance Manual

GENERAL CHARACTERISTICS

DESCRIPTION OF THE UNIT
Ductable precision air-conditioners with capacities from 5 to 100
kW for vertical installation, cooling only, with the possibility of
electric or hot water reheating, humidifier and dehumidifier
option for precise control of the temperature-humidity condi-
tions.
Ideal for air-conditioning technological environments, server
rooms and data processing centres, and technological applications
in general.
These packaged precision air-conditioners operate with R410A
refrigerant and are suitable for indoor installation.
The units conform to the essential requisites established in EC
directive 2006/42.
They are factory tested and on-site installation is limited to the
refrigerant and electrical connections.
STRUCTURE
Base made from painted (RAL 7016) galvanised 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 resins, is lined on the inside with special soundproofing
material.
COMPRESSORS
Hermetic scroll compressors complete with thermal protector.
Fitted on rubber vibration dampers and supplied complete with
oil charge.
FANS
EC RADIAL FAN, STANDARD VERSION
Fan with one-sided intake and backward curved blades, brushless
motor with electronic commutation for excellent performance in
terms of static pressure, low power consumption and reduced
noise. Speed control is modulating, set from the user terminal
based on the correct required static pressure setting.
In the STANDARD version with low residual pressure (20- 100
Pa) at rated flow.
EC RADIAL FAN, HP VERSION
Fan with one-sided intake and backward curved blades, brushless
motor with electronic commutation for excellent performance in
terms of static pressure, low power consumption and reduced
noise. Speed control is modulating, set from the user terminal
based on the correct required static pressure setting.
In the HP version with high residual pressure at rated flow.
FILTER
Pleated filters, supported by a frame, with protective metal mesh,
and regenerable polyester fibre filtering media treated with syn-
thetic resins.
G2/G4 efficiency according to CEN-EN 779, with average removal
efficiency of 90.1% (ASHRAE – G4).
The filter is fire resistant.
AIR HEAT EXCHANGER
Finned coil with large front surface, made from copper tubes
expanded mechanically onto aluminium fins with a high heat
exchange area.
Hydrophilic treatment to assist the drainage of 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, disconnect switch with door interlock
safety device.
4 EN
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 REHEATING (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 control of the ambient parameters and management of the
unit monitoring and control functions (compliant with EEC direc-
tive 89/336).
DIRECT EXPANSION MODELS
HERMETIC SCROLL COMPRESSOR with high energy efficiency
and low noise, plus built-in thermal protector.
REFRIGERANT CIRCUIT comprising:
- liquid receiver;
- filter-drier and flow indicator;
- thermostatic expansion valve;
- external connections with valves;
- low and high pressure switches (with manual reset).
WATER-COOLED CONDENSER (water-cooled models) with
braze welded stainless steel plates.
AIR FLOW CONFIGURATION
O - OVER:Air outlet from top
U - UNDER:Air outlet from bottom
VERSION
BASIC: without condensing pressure control
MODEL: AX_AD Units with condensing pressure control by
modulating fan speed on the outdoor air-cooled
condenser.
MODEL A: AW_AT_AF Units with condensing pressure control
by modulating fan speed on the outdoor water-
cooled dry cooler.
For closed circuit installations.
MODEL B: AW_AT Units with condensing pressure control by
modulating water flow to the plate condenser via
pressure control valve.
For open circuit installations (well water)
LT: Units for low outside temp. (-45°C)
AX_AD_AW_AT Units with condensing pressure
control by modulating fan speed on the outdoor
unit.
ACCURATE AX - AW - AD - AT - AF