EDM SYSCROLL 140 360 AIR EVO

SYSCROLL AIR EVO
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Conformity with standards
The following applies to all the sizes and versions:
Machine Directive: 2006/42/EC
Electromagnetic Compatibility Directive: 2014/30/EU
Pressure Equipment Directive: 2014/68/EU
Ecodesign Directive: 2009/125/EC
Cabinet and structure
The unit cabinet and structure are made of heavy gauge
galvanized steel coated with polyester powder based
painting (RAL 7040). All parts of the structure are fas-
tened 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 tted
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.
Evaporator
Evaporators is of a brazed stainless steel plate type heat
exchanger.
It is insulated with a 19 mm thick closed cell polyethylene
foam material and is tted with a lm type electric heater
on the external surface to prevent the unit from freezing
at a low temperature (down to -18 °C) when the unit is off.
Water connections are of a Male GAS Threaded type:
2”1/2 on sizes 140 to 170 and 3” on sizes 230 to 360.
Condenser coils
The condenser coils are made of seamless copper tubes,
arranged in staggered rows, mechanically expanded into
corrugated aluminum ns. For Cooling only version (CO
version), the condenser coils are of microchannel type,
made of 100% aluminium (ns, tubes and headers) with
the exception of pipe couplings which are in copper.
Ecoating for Microchannel is standard.
Condenser fans
For each size, all versions keep the same number of fans.
Large diameter, direct drive axial type fans with asyn-
chronous three-phase motors are used in all acoustic ver-
sions (-,L,S version) of SYSCROLL 140-360 AIR EVO.
Special inverter fans with electronic brushless type mo-
tors are used in SYSCROLL 140-360 AIR EVO EC (std for
sizes 140-170), HT and HPF.
On high pressure fans of HPF 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 prole
housing which generates low sound levels.
Fan speed control
The speed of fans is controlled in order to operate at a low
ambient temperature.
On units with standard axial fans, the accessory fan speed
control, supplied as standard on S version, is of a pressure
actuated stepless type with an electronic controller.
The pressure actuated stepless type fan speed controller
can be supplied as optional on - and L versions. It allows
the units to operate in cooling mode at ambient tempera-
ture down to -14 °C.
On EC and HPF units with electronic axial fans, the pres-
sure actuated stepless type fan speed control is supplied
as standard, because these electronic fans are already
equipped with an integrated fan speed control (fan speed
range: 50 to 1200 rpm; ambient temperature limit: -18 °C
(in cooling mode only).
Refrigerant circuits
All the units are composed of two independent and sepa-
rate refrigerant circuits.
Each refrigerant circuit is equipped with liquid line and dis-
charge line shutoff valves, lter-drier with solid core, sight
glass and electronic expansion valve (EXV).
The heat pump units (HP) are provided with 4-way re-
versing valves, suction accumulators and liquid receivers
on the liquid lines.
The total heat recovery units (TR) are supplied with 4-way
reversing valves and liquid receivers downstream of the
heat recovery condenser.
The functional diagram of each circuit is shown in the sec-
tion “Refrigerant ow diagram”.
Electrical board
Metal case, externally arranged at one end of the unit.
Case for the board with IP44 protection rating, complete
with grille for natural air ventilation of the box.
Control and safety devices
Each unit is tted with the following devices:
Safety:
Power disconnect switch with an emergency stop func-
tion.
HP switches, set to 40.5 bar, automatic and manual re-
set to be reinitialized from the control panel.
Water differential pressure switch on the evaporator,
set to 105 mbar (corresponding to about 50 % of the
nominal capacity).
Antifreeze temperature sensor (set to +4 °C) on the
evaporator.
Safety valve on discharge lines (for each evaporator),
set to 45 bar.