LOCK BEWEGT // LOCK MOVES 4 Ventilation types CHAPTER 01 – APPLICATIONS 2023 | 06 With Open-Roof systems, the roof can be opened almost completely to assure maximum ventilation. With our versatile selection of options for drive units and rack & pinion units, we are able to provide a solution to all Open-Roof variants. The mechanism can be an continous system (Types A + C) or a push-rod system (Type B). The distinguishing features of the three most commonly used type of Open-Roof ventilation system (Types A – C) are itemized below: Example of Open-Roof ventilation with Type A Type B Type C Open-Roof ventilation – Type A as continous system > Drive provided by a ventilation shaft centrally arranged under primary roof ridge. > Both sides of roof are moved simultaneously by one drive unit. > EWA power drives are used with 1–9 rpm. > In conjunction with the ZSG, AZD and EZD ranges of rack & pinion units, optimum closing times can be achieved. Open-Roof ventilation – Type B as push-rod system > Drive delivered by a push-rod system arranged on the rail mountings (see Fig. on p. 18). > Each side of the roof is moved by its own drive unit. > The drive units employed are our high-speed EWA power drives, our tried and tested SpeedLogic or our TurboLogic systems. > In conjunction with the LZG / UBL ranges of rack & pinion units, optimum closing speeds can be achieved. Open-Roof ventilation – Type C as continous system > Arrangement of full-length ventilation flaps, same principle as on wide-span greenhouses. > The EWA power drive operating at 1–9 rpm is used here. In conjunction with our ZSG, AZD and EZD ranges of rack & pinion units, you obtain an optimum ventilation system. > With our reversing gear units, several ventilation flaps can also be grouped together to form a system. Type A Ventilation types for Open-Roof systems
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