IOM SYSCREW AIR EVO HSE
37
English
7 - Product Description
7.1 Introduction
The units are air cooled water chillers provided with screw
compressors with two refrigeration circuits.
These units are fit for cooling intermediate fluids (glycoled water), for
air-conditioning applications in industrial processes.
These units can be installed outdoor on the roof of a building or at
ground level.
This series includes the following versions:
7.2 General specifications
The units are supplied complete and provided with all connecting
pipes for the refrigerant and internal wiring.
The refrigeration circuit of each unit undergoes a pressure test, is
drained, vacuumised, dehydrated and filled with refrigerant, and
includes the necessary oil. Once assembled, each unit is subjected
to a complete final testing and the correct operation of all refrigeration
circuits is checked.
The base and the frame of each unit are made of very thick
galvanised sheet, and are secured by screw and stainless bolts. All
panels are secured by screw and tropicalised steel bolts, they can be
disassembled for easy access to internal components.
All galvanised steel parts are painted with white polyester resin, to
ensure the resistance of the unit to corrosion and weather agents
over time.
7.3 Compressors
The units are provided with high power, high efficiency and low
vibration level semi-hermetic screw compressors. For special
application (on request) compressors with liquid injection or external
oil cooling with plate-type exchangers can be provided to reduce the
discharge temperature.
As standard, the capacity control is of hybrid type: step type for the
fixed speed compressor and stepless type for the inverter driven
compressor. It is handled by capacity control solenoid valves,
handled by the microprocessor of the appliance.
The motor’s terminals are weatherproof, according to standard IP54.
7.4 Refrigeration circuits
The units are provided with two independent circuits with screw
compressors for each circuit and shell and tube heat exchanger.
Each refrigerant circuit includes: a service valve for refrigerant
filling, shutoff valves for suction lines (on request), as well as for
the delivery and liquid lines, an electronic expansion valve, that
completely closed (as a solenoid valve) makes it possible to start/
stop the compressor, a dehydrating cartridge filter, a sight glass with
humidity indicator.
Furthermore, each circuit is equipped with safety devices in
accordance with PED 2014/68/EU: high and low pressure switches,
safety valves providing protection in case of fire or malfunction of
compressors.
7.5 Water heat exchanger
Evaporator
The units are provided with a direct-expansion refrigerant/water shell
and tube heat exchanger with several refrigeration circuits.
The evaporators are insulated with UV ray-proof 19 mm-thick anti-
condensate closed-cell polyethylene material.
The external surface is provided with wire electric heaters (400-800
W), which prevent frosting at low temperatures (down to -18 °C)
when the unit is off.
VERSION (1) DESCRIPTION
Standard version
Air cooled water chillers, using R134a or R513A refrigerant.
Super Low Noise version (S)
High pressure fan (HPF) (1)
High Temperature version (HT) (1)
OPTIONS DESCRIPTION
Desuperheater (D) The heat recovery is carried out by a desuperheater mounted on the compressor’s discharge line.
Totaly heat recovery Not available. For information, please contact commercial office.
(1) A high pressure fan (HPF) version and High Temperature (HT) version are equipped with extra powered brushless fans, able to work up to
1100 Rpm.
Available options:
Brine Version: Unit with dedicated devices on refrigeration system allows the units to operate with brine (ethylenic or propylenic glycol) down to -8 °C.