ZIZE-ia

Modular units for air flows from 2.0 to 9.0 m³/s

Product description
The ZIZE-ia series is designed for the most favourable life cycle costs and reliability. At the heart of the standalone unit is PolyCross®, our proprietary two-step cross-flow heat exchanger. With balanced air flows, this heat exchanger is capable of achieving thermal efficiencies of up to 95%. Moreover, the need for defrosting is significantly reduced due to the size of the heat exchanger and the component material's low surface roughness and hydrophobic properties. Naturally, fewer defrost cycles means lower energy usage. The size and volume of the heat exchanger results in a laminar air flow through the exchanger, in principle the entire air flow area. This means favourable thermal recovery even with very low air flows, the optimal solution for a VAV or DCV system. The fans are based on EC technology and the overall result is a highly favourable LCC calculation and minimal environmental impact.
The units are all designed as knock-down kits for convenient on-site assembly. A knock-down kit can prove highly advantageous in that the parts can be transported through a door opening as narrow as 600 mm. This means that spaces that are otherwise not viable can be used without any physical alterations to, for example, façades and rooftops. This is particularly advantageous in renovation projects.

Applications
The two-step cross-flow heat exchanger has completely separate air streams and as such is suitable for all types of buildings, especially those where odour transfer must be ruled out.
Examples of suitable building types:
• Residential
• Offices
• Hotels
• Hospitals
• Schools

The ZIZE-ia series is designed primarily for indoor installation, generally in a fan room. If necessary, custom units for installation elsewhere can be provided.


Functions & accessories
Aside from standard functions such as supply and exhaust air, heat exchange and filtration, a number of other functions are available. Here are a few examples:
• Right- or left-handed (option)
• Side or top exhaust air connection (option)
• ACDD defrosting function – A proprietary control function found in our Climatix controller (option)
• Fire function/bypass filter – Damper that opens in the event of fire, allowing the exhaust air to bypass the filters (standard – can be deselected)
• Air heater (water)
• Air cooler (water)
• Different filter classes
• Shut-off damper
• Climatix controller for pressure or flow control
• Plinth solution excluding controller but including installation material (sensors, actuators, wiring…)
• And much more…

Sizing and configuration
In order to find the optimal size for your project, you can use our user-friendly unit selection program, available for download here. The program allows you to select functions and accessories according to needs. Should you fail to find an ideal solution in our highly flexible range, or need help, then contact us here at VoltAir for assistance.


Documentation
Relevant documentation for the ZIZE-ia series can be found here.

Heat exchanger
The heart of the system is a cross-flow plate heat exchanger in PolyCross with high resistance to dirt and ice particles and a temperature efficiency up to 95% at standard flow.

EC fans
Energy-efficient exhaust and extract air fans with the latest EC technology are used to the extent available in the market.
For some installations, double suction radial fans are advantageously used.

Filter
Supply air filter ePM1 65% (F7), and exhaust air filter ePM10 60% (F5) is included in all unit units.

Bypass
All units are equipped with bypass dampers on both the supply air and the extract air for optimum control of the heat exchange.