Unit components
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Standard equipment --
Casing made of galvanised steel metal with polyester paint , white colour RAL 7035 . Thermal insulation 10 mm thick , fire classification M1 .
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Self-supporting frame and access panels to the electric panel , compressors , fans , etc .
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Outdoor circuit --
Axial 2-speed fans directly coupled to the motor . Watertight motor class F , IP54 and internal thermal protection . Dynamically balanced propellers and outdoor protective grille .
-- Coil with copper pipes and aluminium fins .
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Indoor circuit --
Centrifugal fans coupling by pulleys and belts . Two double-intake turbines , with an impeller with front-curved blades . Greased spherical bearings , with no maintenance required . Two electric motors with tensioner , class F , IP55 and internal thermal protection .
-- Reusable air filters , assembled on a frame .
-- Coil with copper pipes and aluminium fins .
-- Condensates drain pan in galvanised steel .
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Cooling circuit
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Hermetic scroll-type compressor with sound |
insulation , assembled on antivibration mounts . Control |
of phase equilibrium and the direction of rotation . |
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Crankcase heater ( heat pump units ). |
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Four-way cycle reversing valves ( heat pump units ). |
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Anti-acid dehydrator filters . |
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Thermostatic expansion valves with external equalisation . |
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Gas burner --
Natural gas or propane gas burner designed in accordance with the standards in force in compliance with the Gas Directive 90 / 396 EEC .
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Output control with proportional actuator 0-10V performed by the burner ’ s own control .
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Condensation boiler with premixing and modulation technology that allows performance close to 105 % with regard to the lower heating value ( LHV ).
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Combustion chamber in stainless steel AISI 430 and pipes for the hot gas exchanger and the smoke outlet manifold in stainless steel with a low carbon AISI 304L content to guarantee a high resistance to condensation .
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The recovery pipes have a flat design and grooves to increase turbulence thus increasing the heat transfer coefficient and therefore reducing the fuel consumption .
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Protections
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High and low pressure pressostats . |
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Compressor discharge temperature control . |
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Non-return valve built into the compressor . |
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Klixon in the compressor . |
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Differential pressostat for control of air flow . |
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Main door switch . |
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Magnetothermic protection switches for the compressor |
power line and fan motor . |
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Automatic switch in the control circuit . |
AIR TREATMENT
842 C A R R I E R 2 0 1 6 / 2 0 1 7