Roof fan GRD 22

roof fan
roof fan
roof fan
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Article number: 0087.0016 Manufacturer: MAICO Application examples: Central air extraction from multiple family living units in combination with Centro exhaust air elements. GRD 22 - short description Centrifugal roof fan with EC motor with integrated control for constant pressure or constant volumetric flow, DN 224 GRD 22 - Product description Features Pressure or volumetric constancy can be set. 2 speed levels for day/night operations. Day/night operation can be set using 2 reference volumetric flows or 2 reference pressure levels. With automatic fault message. Can be used for central ventilation systems in accordance with DIN 18017-3. Adjustments can be undertaken without pressure or volumetric flow having to be measured. Housing easily detachable for cleaning purposes. Galvanized protective grille on the discharge side, protection against accidental contact in accordance with DIN EN ISO 13857. Sturdy eyebolts enable transport by crane. Impeller with blades curved to the rear, dynamically balanced at two levels, in accordance with performance level 6.3, DIN ISO 1940. Impeller made of glass-fibre filled polypropylene. With service switch. IP 45 degree of protection. Control unit Control unit included in scope of delivery. Any installation inside the building. Pressure sensor fitted in fan housing ready for use. Control unit for operating in constant pressure / constant volumetric flow mode. A minimum volumetric flow is required for the correct function: GRD 22 - 150 m3/h GRD 25 - 200 m3/h GRD 31 - 250 m3/h


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