InstallatIon, operatIon and maIntenance InstructIons Pressure-relief damPers drK bacK-draught damPers rsK Product designation DRK-10…., RSK10…. technical sPecifications Max. size W x H: drK: 2400 mm x 7900 mm rsK: 7900 mm x 7900 mm (subject to shipping) Max. slat length: 1200 mm Tripping pressure: drK: acc. to order rsK: no specified tripping pressure Air flow direction: horizontal or vertical acc. to customer order Free cross section: >60 % ((more precise figures after calculation by manufacturer) ateX DRK and RSK are only approved in specific designs and with appropriate identification for Zones 1, 21 21 and 22 according 2, or 2, 22 according to ATEX Directive 2014/34/EU. to ATEX Directive 94/9/EC. If the fitter or operator changes the dampers in any way, the ATEX approval becomes null and void. It is important to ensure that the damper and additional equipment are installed in compliance with zoning requirements. In principle, avoid all damage caused by external influences. Never lift dampers by the slats or the outer linkages. Dampers with a maximum weight of 50 kg can be lifted by the C-profile frame. With heavier dampers, use at least four points at the corner angles as suspension points. Do not use individual slats under any circumstances as footholds during installation. Report any damage, e.g. deformation of slats, dents, impacts or warping of the C-profile frame etc. imme- diately to the supplier or manufacturer. This may impair the proper functioning of the damper and at best cause dangerous circumstances to occur. These dampers can be fitted or removed to or from a wall or an air conditioning system, or integrated in a duct section. First make sure the air flow is in the proper direction as indicated by the red arrow on the damper housing. Mount the dampers warp-free, tension-free, on a flat surface and without any angular errors in the damper frame. When mounting, use the 4 corner holes provided as standard. With larger dampers, fit additional flange couplings at spacings of 200-500 mm. This is the responsibility of the planning engineer or fitter. During installation, make sure that the slats are exactly horizontal. The damper must be adjusted exactly vertically (for horizontal air flow) or exactly horizontally (for vertical air flow). Avoid as far as possible any reduction in freedom of movement on customer premises when installing insulation materials, installation ducts, auxiliary structures etc. If this is not observed, it can lead to considerable disruptions in operation, e.g. slats rub against the damper frame, different tripping pressure, damper fails to open or close, reduced leak tightness, etc. ateX: Under no circumstances may ATEX dampers be fitted after a fall or impact with visible or concealed damage On models with side seals (Di, DIN, CEN etc.) protect the units from impurities of all kinds during the installation phase. Drilling swarf and concrete chips can damage the side seals. Before starting up the dampers, wipe the side seals thoroughly until they are dry. When installation is complete, check the angle of the damper frame. It must be exactly 90°. Correct any deviations immediately. In addition check the free movement of the slats, linkage and tripping mechanism.

InstallatIon, operatIon and maIntenance InstructIons Pressure-relief damPers drK bacK-draught damPers rsK installation ateX: All relevant national and international standards and regulations for Ex zones must be observed. On dampers with ATEX functionality in particular, the damper housing must be earthed using the earthing braids attached by the manufacturer. No mechanical changes may be made to the product. In addition do not attach any components (motors, limit switches, etc.) to the damper if they have not been analyzed for ignition risk by the appropriate manufacturers or ap- proved for...