EDM VLC S.2GB08.16
2
General
The new VLC units have been designed to operate with HFC 410A refrigerant.
Both compressors and heat exchangers have been optimized for this
refrigerant.
They consist of two independent refrigerant circuits, a tandem high
efficiency and low vibration level Scroll compressors on each circuit and
a ventilating unit comprising V-shape coils and quiet fans; each of them is
located in an externally mounted nozzle profile housing generating low sound
level.
The VLC units are available in 8 sizes, from size 524 to 1204, with a nominal
capacity range from 154 to 347 kW.
The VLC-STD (Standard) version can be supplied with 3 acoustic options :
Base Low Noise (BLN) : The units are equipped with delta connected
fans implying a standard rpm. The units are not supplied with fan
speed controller, but fitted with compressors box to reduce the noise
emissions.
Low Noise (LN) : The units are equipped with star connected fans
implying a low rpm. The units are not supplied with fan speed controller,
but fitted with compressors box to reduce the noise emissions.
Extra Low Noise (ELN) : The units are equipped with star connected
fans, fitted with a speed controller which allows the units to operate
with a very low rpm. The units are supplied with compressors box and
soundproof jackets on compressors reducing significantly the noise
emissions.
To increase their field of applications, the VLC ranges are available in 3
additional versions :
HSE (High Seasonal Efficiency) version : It has same equipment as
that of the STD version, except that the units are equipped with special
inverter fans, of large diameter, driven by EC (electronic brushless
type) motors with integrated electronic inverter, to ensure low energy
consumption. This version can be supplied with BLN, LN or ELN acoustic
options.
HT (High Temperature) version : It has same equipment as that of the
BLN units, but the units are fitted with special inverter fans and motors
identical to those of the HSE version, but with a different regulation. The
HT version can be supplied with BLN acoustic option only.
SIF (Special Inverter Fan) version : It has same equipment as that
of the BLN units, except that the units are equipped with special
inverter fans (same as those used on HSE version, but with a
different regulation) driven by EC motors with integrated electronic
inverter. The SIF version provides external static pressure up to
120 Pa. This version can be supplied with BLN acoustic option only.
Specifications
Conformity with standards
The following applies to all the sizes and versions of VLC units :
3 Machine Directive : 2006/42/EC
3 Low Voltage Directive : 2006/95/EC
3 Electromagnetic Compatibility : 2004/108/EC
3 Pressure Equipment Directive : 2014/68/UE
Cabinet and structure
The unit cabinet and structure are made of heavy gauge galvanized steel
coated with polyester powder based painting (RAL 9001). All parts of the
structure are fastened totally with non-corrosive screws and bolts.
Compressors
Each unit is equipped with four compressors arranged in two tandems to suit
the two refrigerant circuits.
The compressors are of hermetic scroll type and fitted with an electronic
control system ensuring protection against high temperature and excessive
load.
All compressors have direct-on-line starting and are mounted on rubber
vibration isolators in order to minimize noise and vibration transmission.
Condenser coils
The condenser coils are made of seamless copper tubes, arranged in
staggered rows, mechanically expanded into corrugated aluminum fins.
Condenser fans
For each size, all versions keep the same number of fans.
Large diameter, direct drive axial type fans with asynchronous three-phase
motors are used in all acoustic versions (BLN, LN & ELN) of VLC 524-1204
STD units.
Special inverter fans with electronic brushless type motors are used in VLC
524-1204 HSE, SIF and HT units.
On high pressure fans of SIF units, the external static pressure
(≤ 120 Pa) can be adjusted on site to match the customer demand directly
from the electronic control panel of the unit.
Fans are equipped with externally mounted nozzle profile housing which
generates low sound levels.
Outstanding Strength Points
Units with R410A refrigerant (it will be the real replacement of R22).
As near azeotropic mixture it behaves like a homogeneous substance
(reduced service problems in case of leakage or re-charge) with
negligible temperature glide.
Refrigerant with superior thermo-dynamical proprieties compared to R22
and R407C, it allows to have more efficiency or compact and lighter
systems and larger operating limits.
With except for the fans, all the versions keep the same configuration of
the base units (same structure, electrical board, compressors and coils).
Easy upgrade of the units in stock or on the field.
Optimized coils design (30% refrigerant charge reduction).
Compressors box (less sound proofing) always installed - additional
compressors jackets only for ELN version (easy upgrade of the units in
stock).
Special version (HSE) developed for high seasonal efficiency (ESEER
higher than 4.5 (more than 15% compared to standard version)) and high
operation limits with inverter fans (electronic brushless type motor). Axial
fan of large diameter.
Special version (SIF) for high external static pressure (max. 120 Pa)
with inverter fans (electronic brushless type motor). Axial fan of large
diameter. These fans are the same as those used on HSE units.
Modified and improved base frame - AVM fitted underneath of base frame
so no brackets request (no problem for track and container freight). In
the same positions, the plastic feet will be installed for fork handling.
New microprocessor : 4 times greater RAM memory compared with
previous version, flash memory card and compressors envelope curves
put inside, 3 times faster than previous control.
For service operation, special valves dedicated to R410A are supplied
on the refrigerant system. These valves, of 5/16" flare SAE type, are
mounted on the liquid line and on the gauges manifold of the unit.