SYSAER SG

2.0 - Components
2.1 - Casing
The unit casing and frame shall be fabricated of heavy duty galvanized steel. All galvanized steel components shall be individually
painted by a special painting process to provide a homogeneous protection to the corrosion before the assembly for the unit. The
painting shall be a polyester powder based type, colored in RAL 7040.
The unit should be delivered with 25mm double skin in the air treatment section.
2.2 - Compressors
The compressor shall be vibration isolated from the frame by rubber pads.
The compressor motors shall have direct startup and be cooled by the refrigerant gas. Each motor shall be protected from thermal
overloads. A phase sequence monitor shall be supplied as standard.
The compressors shall be easily accessible and installed in a compartment acoustically insulated from the air flow, in order to
guarantee a low noise operation.
[Option] A factory-installed soft starter shall be provided to automatically start up the compressors gradually.
2.3 - Refrigerant circuit
The units should have 2 independent circuits well balanced, to guarantee a constant supply temperature even during defrost cycles
and optimize energy consumption at part load.
The unit shall contain refrigerant circuit that includes scroll compressor, a plate heat exchanger, a thermostatic or electronic
expansion valve, 4 way reverse cycle valve and liquid reservoir, ___ condenser coil(s), as well as safety and control devices such as
high pressure switch, high/low pressure transducers and PED safety valve.
Inspection on refrigerant via a sight glass shall be possible during service operation by removing an access panel, without disturbing
the unit operation conditions.
2.4 – Condenser/Evaporator
The condenser/Evaporator coil shall be constructed with seamless copper tubes mechanically bonded to aluminum plate fins. The
fins shall have fully drawn collars to completely cover the copper tubes and protect against atmospheric corrosion.
The evaporator fin shall be covered with a layer of anti-rust coating (blue fins) to protect the condenser from corrosion and natural
element (wind, dust and salty air) hence increasing its reliability and life span.
The evaporator shall be over dimensioned to optimize performance and limit the frequency of defrosting cycles. The unit should run
alternate defrost cycle on each evaporator in order to avoid cold draught in small volume.
[Option] Copper tubes mechanically bounded into aluminum fins with Blygold® coating after coil assembly to enhance corrosion and
chemical resistance.
[Option] Copper tubes mechanically bounded into aluminum fins with Epoxy® pre-coating to enhance corrosion and chemical
resistance.
A protection grilles to protect the condenser from unauthorized intrusions and shocks shall be installed as a standard in the factory.
Each circuit shall have axial fan(s). Each fan shall be cabled in order to have high speed for standard version.
Each fan shall be individually driven by a direct drive motor. The Fan motor shall have an IP54 grade and equipped with a thermal
overload protection.
Each fan shall be housed in its own compartment and protected by a heavy gauge grille.
[Option] A pressostatic type fan speed controller shall be delivered as a factory fitted option to allow operation in low ambient
temperature (-10°C) in cooling mode.
2.5- Fans
At the supply, the unit shall be equipped with plug fan for better Indoor Air Quality and Efficiency
When the set point is reached, the unit shall automatically reduce the fan speed to decrease the consumption of the fan
[Option] The unit shall be delivered with EC plug fan
[Option] At the supply/exhaust, the unit should be delivered with a High Static Pressure plug fan
[Option] 2.6 – Fresh Air Management (2 way Dampers)
The unit shall be equipped with a 2 way damper system in order to manage the rate of Fresh air
[Option] The unit should be equipped with a G4-50mm filter and F7-100mm filter for better indoor air quality