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7. UNIT VERSION
Individual elements of the unit are made of the following materials:
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external side panels, floor panels, feet – galvanized sheet DX51D,
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external side panel – aluzinc type sheet DX51D+AZ185-A-SE,
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drip trays – stainless steel X5CrNi18-10 (1.4301),
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casing structure - aluminium,
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blades of the air dampers – aluminium,
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filling of rotary heat exchanger – aluminium,
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heating, cooling coil fins – aluminium,
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heating, cooling coil tubes and collectors - copper,
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all the slots on the contact with casing elements are filled with silicone,
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door panels seals are made of EPDM,
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drainage of condensate protected against drawback with siphons,
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surfaces of removable splitters of silencers resistant to abrasion,
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fine filters, at least F5 class,
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very fine filters - F7 class,
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fans with direct drive.
8. DESIGN
Series of types includes 5 sizes of units (10, 20, 30, 40, 50) within the capacity from 500 up to
18,000 m
3
/h. Series of types includes:
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base section;
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water heating coil section;
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common water heating and water cooling coil section;
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common water heating and freon evaporation coil section;
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silencing section.
Due to their design and materials used, the units do not emit non-ionising radiation.
8.1. BASE SECTION
The section has been designed as air-supply and exhaust type in double-deck configuration. The
section comprises: casing, dampers, filters, fans, rotary heat exchanger, condensate tray.
8.1.1. Casing
Casing construction bases on the spacious frame made of aluminium profile. Wall, roof and
base planes are heat insulation panels made of 45 mm thick mineral. Inside the panel special
reinforcements are used thanks to which the whole structure is stiff and strong. At the service side
there is hinged inspection door closed using clamps with thumb screws. In order to ensure proper
tightness of the whole casing the panels are sealed with special adhesive, and inspection door is
provided with double seals.
To keep tightness between base section and other sections, air supply inlets and outlets have
insulation on their circuits. Additionally, in corners of the casings at air supply inlet and outlet sides
steel section connectors with oblong holes are fitted. When connecting sections, this solution
enables to level any slight unevenness in surface for setting the unit both vertically, and horizontally.
To ensure the units are set properly on the ground, in casings of base sections in 10, 20, 30 sizes,
load-bearing feet are provided. In other sizes the casing is equipped with load-bearing base with
handles for vertical transportation, made from galvanized steel section.
