EDM SYSCROLL 400 900 AIR EVO
SYSCROLL 400-900 AIR EVO
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Cabinet
The cabinet is made of heavy gauge galvanized steel.
All galvanized steel components are individually painted
by a special painting process before the assembly of the
unit. This painting system performs a homogeneous pro-
tection to the corrosion.
The painting is a polyester powder based type, colored in
RAL 7040. The units are suitable for outdoor installation,
directly on the building roof or at the ground level.
Compressors
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
Indoor heat exchangers are brazed stainless steel plate
type. They are insulated with a 19 mm thick closed cell
polyethylene foam material and provided with Victaulic
connections.
They are protected by a antifreeze electric heater to en-
sure a good protection against freezing at low ambient
temperature when the unit is switched off.
Maximum working pressure is 10 bar water side and 45
bar refrigerant side.
Condenser coils
Condenser coils are made of seamless copper tubes, ar-
ranged in staggered rows, mechanically expanded into
corrugated aluminum ns.
In Cooling only version (CO) condenser coils are micro-
channel type, made of 100% aluminum (ns, tubes and
headers) with the exception of copper pipe couplings. Ad-
ditional surface coating is provided for the standard de-
livery in order to further improve resistance to corrosion.
Condenser fans
Basic units (in all different sound versions) are equipped
with axial fans, direct drive with asynchronous three-
phase motors.
Special fan with electronic brushless type motors are used
in EC, HT, BC, PH, HPF versions.
Fans are equipped with externally mounted nozzle prole
housing generating low sound levels.
Refrigerant circuit
Units from size 400 to size 670 are equipped with two
separated refrigerant circuits. Units from size 750 to size
900 are equipped with four separated refrigerant circuits.
Each refrigerant circuit is equipped with liquid line and
discharge line shut-off valves, lter-drier with solid core,
sight glass and electronic expansion valve.
Heat pump units (HP) are additionally provided with
4-way reversing valves, suction accumulators and liquid
receivers.
Total heat recovery units (TR) are additionally provided
with 4-way reversing valves and liquid receivers.
Control panel
A new optimized control with easy-friendly interface, can
manage unit operation under different load and tempera-
ture condition, providing following functions:
Compressor management
Power on/off
Anti-cycle
Tandem / trio unloading for high / low
pressure, high temperature and/or high
compressor pressure ratio
Chilled and hot water temperature regulation (return
water temperature RWT - P+I type or leaving water
temperature LWT - neutral band type)
Automatic control of suction superheating through elec-
tronic expansion valve with optimized functions (cool-
ing, heating, start-up and defrost)
Evaporator antifreeze protection
Smart defrost management
Load shedding (part load operation by digital input)
Dynamic set-point according outdoor air temperature
High and low pressure operating conditions manage-
ment
External interlocks management
Remote control management
Unit power on / off
Unit cool / heat operation
Unit dynamic set-point (tension signal
analogue input)
Summary alarm signal
Remote signaling, by dry contacts:
Voltage presence
Compressors in operation
General alarm
Hydro-kit management: start-up of pump, antifreeze
heater of external tank, pump anti-sticking function
Heat recovery management by means of RWT sensor at
the heat recovery condenser
Unit controller can display all operating parameters such
as:
Return water temperature
Leaving water temperature
Outdoor ambient temperature
Refrigerant discharge pressure
Refrigerant suction pressure
Refrigerant suction temperature
Refrigerant discharge temperature
Refrigerant coil temperature
Refrigerant suction superheat
Electronic expansion valve % opening step