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NRWG
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Catalog excerpts

NRWG - 1

Technical documentation SCHAKO | Ferdinand Schad KG Steigstrasse 25-27 D-78600 Kolbingen Declaration of Performance 09-53-DoP- JK-180MB-2014-11-01 09-53-DoP-JK-190-2014-11-01 EC Certificate of Conformity 1368-CPD-C-004/2013 Performance Reliability Certificate 1368-CPR-C-7050

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NRWG - 2

TECHNICAL DOCUMENTATION Function and use | Areas of application and requirements FUNCTION AND USE A natural smoke and heat exhaust ventilator (NRWG) is an important part of a smoke and heat exhaust ventilation system (RWA). In case of fire, it is used to remove hot gases from a building in order to protect people, material property and the environment. In case of fire, smoke and heat exhaust ventilation systems are supposed to ensure a smoke-free layer near the floor by removing a sufficient amount of the smoke gas from the smoke section. Moreover, in the initial fire, their function is to...

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NRWG - 3

NRWG TECHNICAL DOCUMENTATION Capacity and classification | Summary The classifications for NRWG-180/ NRWG-190 are highlighted in colour. *) A is used as wild card for a certain value specified by the manufacturer Aerodynamically active opening area • Geometric opening area multiplied by the flow rate coefficient • Flow rate coefficient determined experimentally either directly or indirectly from the test results of NRWGs of different sizes or from scaled-down models Operational safety • Proof that the NRWG opens and closes during the number of specified cycles • The designations A, 50 and...

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NRWG - 4

NRWG TECHNICAL DOCUMENTATION Processing |PROCESSING Frame • Profiled galvanised sheet steel 1,5 mm • Dimensionally stable • NRWG-180 - for flush-mounted installation with 180 mm frame depth and mounting plate • NRWG-190 - for surface-mounted installation with 190 mm frame depth • Bores for fastening the accessories Blades • Hollow-body aluminium blades • Flow-favouring and torsion-resistant • Block adjustment in opposite directions Seal • EPDM rubber profile Bearing • Sintered bearing Gear wheels • plastic PA6 • Arranged on one side • The flow-favouring aluminium blades are jointly adjusted...

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NRWG - 5

MODEL NRWG-180/ NRWG-190 NRWG TECHNICAL DOCUMENTATION MODEL NRWG-180/ NRWG-190 | Size chart B and H components can be freely selected 1 = Frame (B part) 2 = Frame (H part) 3 = Actuator side (gear wheel cover) 4 = Actuator 5 = Blade Front view Drive side Gear wheels Blades Construction subject to change No return possible

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NRWG - 6

NRWG TECHNICAL DOCUMENTATION Drives NRWG-180/ NRWG-190 | DIRECT-CURRENT ACTUATOR (ONLY AVAILABLE ON REQUEST) Spring return actuator with emergency control function (currentless open) for adjusting air dampers. For use in openings for smoke removal and in daily ventilation operation. Suitable for interior assembly only. Electrical, with spring return (currentless OPEN) 20 Nm, 230 V AC, 2/3-point (-E024) 20 Nm, 24 V AC, 2/3-point (-E025) 20 Nm, 24 V AC/DC, 0-10 V DC with RJ45 plug (-E072) 20 Nm, 24 V AC/DC, 0-10 V DC (-E073) Electrical, with integrated limit switches (accessories) Actuator...

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NRWG - 7

NRWG TECHNICAL DOCUMENTATION Accessories |ACCESSORIES NRWG-180 Mounting plate (-MB1) • Preassembled • For flush-mounted installation • Galvanised sheet steel 1,5 mm • Fastening materials - Allen screw - Washer - Cage nut Wall anchor package 1 (-M1) Fastening material for fastening mounting plate to masonry • Anchor bolt • Sealing tape • Spacer sleeves • O-ring NRWG-190 Wall anchor package 2 (-M2) Fastening material for fastening multi-leaf damper to masonry • Anchor bolt • Sealing tape • Spacer sleeves • O-ring Wall anchor package 3 (-M3) Fastening material for fastening accessories to...

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NRWG - 8

NRWG TECHNICAL DOCUMENTATION Cross-sections and opening surface areas | GEOMETRIC OPENING SURFACE AREA (AV) AERODYNAMICALLY ACTIVE OPENING SURFACE AREA WITH WEATHER PROTECTION HOOD When using the NRWG multi-leaf damper with weather protection hood, the value of the aerodynamically active opening surface area of the weather protection hood must be taken into account. Construction subject to change No return possible

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NRWG - 9

NRWG TECHNICAL DOCUMENTATION Dimensions NRWG-180 | Cable bushing Clear opening Cable bushing in the mounting plate In order to be able to feed a cable through the mounting plate area, a stepped spigot is mounted in factory. If necessary, this stepped spigot can be cut during the assembly to feed a cable through and can be used for cables with a diameter between 13 and 26,5 mm. The cable bushing has the degree of protection IP55. Construction subject to change No return possible

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NRWG - 10

NRWG TECHNICAL DOCUMENTATION Dimensions NRWG-190 | Clear opening Clear opening Construction subject to change No return possible

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NRWG - 11

TECHNICAL DOCUMENTATION INSTALLATION INFORMATION The multi-leaf dampers must not be tilted during installation. Otherwise, this may result in problems with the adjustment mechanism or in leaks. Multi-leaf damper – Mounting plate (NRWG-180) The multi-leaf dampers are delivered in open position (currentless OPEN) and must be mounted as such. 4 NRWGs must be installed such that external forces do not impair their permanent functioning. They must be fastened by means of suitable mounting materials approved by the building supervisory authorities (see Accessories) in accordance with the mounting...

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NRWG - 12

TECHNICAL DOCUMENTATION Fastening points Fastening points If required, the connecting cable of the actuator must be run through the opening provided in the mounting plate and fastened using the cable traction relief premounted on the connecting cable. Detail Construction subject to change No return possible

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NRWG - 13

TECHNICAL DOCUMENTATION INSTALLATION ACCESSORIES NRWG-190 Support sheet (-AB1) Fastening points Construction subject to change No return possible

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NRWG - 14

TECHNICAL DOCUMENTATION Installation frame edge mounting (-ER1 / -ER2)  ER1  fastened to the wall via the bracket on the H part of the multi-leaf damper (opposite side of the actuator)  ER2  fastened to the wall via the bracket on one of the two B parts of the multi-leaf damper Fastening points Construction subject to change No return possible

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