Controllers
The use of Fan Speed Controllers offers precise control within your ventilation set-up. It allows you to adjust and determine your fans' speeds, thus ensuring energy efficiency and a longer life to your fan motors.
Alongside the ventilation range of products there is an extensive range of control technology available, used to regulate the speed of fans. Through fan speed regulation, the air flow delivered by the fan is controlled. The whole purpose of fan speed control is to achieve optimal air quality levels – for example in occupied rooms or for industrial processes.
Ziehl-Abegg develops and produces controllers utilising different methods of speed control. This variety of fan speed control methods enables Ziehl-Abegg to offer fan speed control solutions which are accurately aligned with the preferences and demands of discerning customers.
With centrifugal fans, it is usual for the direction of the air flow to change by an angle of 90 degrees. Free running impellers and scroll fans differ in that scroll fans require a volute casing to generate pressure.
Centrifugal fans are used for higher pressures and medium air volume flows. They are also used in ducted applications. Centrifugal fans provide great versatility in ventilation, cooling and air conditioning applications.
For axial fans the concept of a propeller is applied. The flow through the impeller with the (propeller) blade is largely parallel to the rotor shaft, thus, the name axial fans. The rotating blade has a complex profile to achieve highest efficiency. Basically, the operating principle can be described like this: the air on the suction side flows constantly from all parts of the room to the inlet. Thus the inlet ring acts as a suction head. On the delivery side the air is ejected along the axis, effected by by the motion of the fan blades, pushing the air through the fan.
Axial fans are mainly used for low pressure and larger air volumes. Ventilation, heating and cooling are thus the main application areas.
Filters
All types of filters supplied - no minimum quantity. Filters are used in ventilation systems for protection against impurities and to ensure adequate indoor air quality for users in rooms with ventilation systems. The main parameter of air filters is impurity control efficiency with as low as possible obstruction to air flow.
There is an increasing need to maintain and improve hygiene standards and reduce fire hazards within kitchens. The baffle grease filter accomplishes both needs through its clever design of interlocking baffles that provide a tortuous route for the passage of air through the filter by creating two rapid 180° air direction changes simultaneously. The grease molecules having a far greater inertial force than air, impact themselves on the vanes.
A series of vertical Stainless Steel vanes are housed in a channel frame, with each of the baffles strategically aligned to provide the highest potential for grease removal. Due to the smooth nature of the vanes the grease naturally runs downwards, through the drainage holes and into the collecting trays normally provided within the canopy holding casings.
The filters comply with the requirements of DW.172. Approved to DIN18869-5.
Used in HVAC systems where an increased level of protection is required and filtration for higher air volume systems.
Construction: Water resistant card frame with lattice faces containing pleated polyester filter media reinforced with an expanded metal support grid.
Typical Applications: HVAC of Offices, Retail Shops & Centres, Education, Leisure, Restaurants, Kitchens, Hotels and Residential Homes
These devices provide a failsafe to assist in maintaining kitchen safety. A gas interlock system restricts the flow of gas to cooking appliances until the ventilation system is on and working correctly.
The Merlin CO2 Monitor is designed specifically for use in commercial kitchens and also suits Gas Safe Bulletin TB140. The Merlin CO2 Monitor gives a LED display reading to show the customer a clear and precise reading of the CO2 level in the room and also uses a traffic light colour system to show the customer whether the air quality in the room is at a safe, adequate or dangerous level.
The Merlin CO2 Monitor can be used independently or can work in conjunction with one of our Merlin gas interlock systems. In the event where the CO2 levels rose to a dangerous level the Merlin CO2 Monitor would sound an audible alarm to alert the customer of the danger, and send a signal to
the gas interlock system which will in turn close the gas solenoid valve.
The Merlin CT1250 ventilation interlock system, with built in current monitoring, is designed specifically for use in commercial kitchens to meet S6173. This panel is to be used when the kitchen appliances do have flame failure devices, therefore Gas proving is not a requirement.
The Merlin CT1250 acts as an interlock between the ventilation system and the gas solenoid valve.
The system has built in current monitors in order to interlock with up to 2 fans and offers an alternative to using air pressure differential switches.
The Merlin CT1650+ ventilation interlock system is specifically designed for use in commercial kitchens to meet BS6173 and IGEM UP19.
The Merlin 1650+ system displays the working current of the fans allowing the engineer to confidently and accurately calibrate the current monitors and interlock with the fans. The Merlin CT1650+ System acts as an interlock between the ventilation system and the gas solenoid valve. The Merlin CT1650+ system has built in current monitors to monitor the fans.
The current monitors can be calibrated to shut off the gas supply if the fan is working abnormally either below or above the fans normal current range. The 1650+ also has a built in 10% +/- threshold tolerance to eliminate nuisance momentary fan faults.
Light Fittings
LED Light Fittings give highest efficiency (Lumen/Watt) available in food service applications - higher light output: for a brighter, safer working environment.
