LTV
General Information
Description
Bovema air handling units type LTV are designed to cover the various requirements of heating, cooling, heat recovery, humidification and air filtration, for both commercial and industrial buildings.
The modular construction and large choice of design capacities make it possible to customise the systems to meet exact customer and project specifications.
The lightweight, corrosion-free aluminium construction allows for external or internal installation of the units. External installation saves space and minimises the effects of unwanted noise, with double skin insulation protecting the conditioned air from the effects of the environment.
The units have a smooth external surface to facilitate cleaning in hygiene sensitive areas such as the food industry. Large hinged doors provide easy access for simple maintenance or cleaning of the internal components.
The production of LTV units is carried out in a quality assured factory, certified according to the NEN-EN-ISO 9001 standard. The standard units are manufactured from corrosion resistant aluminium to ensure many years of trouble free operation, and special applications can also be catered for by the manufacture of units with internal housings in stainless steel or chemical resistant materials. This allows for the use of aggressive cleaning materials, or methods where the process requires it for hygienic air flow conditions over a long period of operation.
Operating Principles
Outside air is drawn in via a weather protected hood fitted with a stainless steel birdmesh. The air then passes through a fan unit and other modules, which regulate the air flow and condition it as required, prior to discharge into the building. The following modules may be incorporated in any required arrangement to meet the system design air quality requirements.
Warm Air Re-circulation
Using a module with a set of opposed blade dampers, fresh air and internal room air may be mixed together in the correct proportions. Fixed or operable damper system allow for fixed or variable percentages of fresh / re-circulated air to be mixed, with proportional or fixed maximum values as required.
Air Filtration
Flat panel or bag type filter systems can be incorporated to protect the heating or cooling elements or to act as a pre-filter units for a higher class of final filter. Bag filters up to class EU9 or HEPA quality filters are available, fitted into corrosion-free frames for ease of inspection and replacement as required. The final filter may installed after the fan section. Pressure differential manometers or time clock systems are available to monitor the filter system performance or operating cycle times. A plastic condensate collection tray under the filters may be supplied as an optional extra.
Air Cooling
Direct expansion, split package, refrigeration type air conditioning units or chilled water cooling coils may be provided to cool the air as it passes through the air handling unit. Plastic condensate collectors and drainage trays may be built into the cooling module as required. Indirect air heating: Indirect air heating elements may be provided within the heating module. Hot water, steam, thermal transfer oil systems or indirect gas fired heat exchangers may be fitted, and where these operate in combination with air re-circulation systems, a most economical solution may be provided for many applications.
Direct Air Heating
A gas fired, direct air heating system may also be provided using a special heating module. It is not possible to combine this alternative with air re-circulation modules.
Heat Recovery
In areas with high process or other heat gains, a heat recovery system may be appropriate as an energy economy measure, and to accommodate this requirement a special heat recovery module is available. This module may incorporate a plate type heat exchanger, a heat wheel exchanger unit or a twin coil heat exchange unit, with the correct type being selected to optimise the heat load characteristics of the building.
Fans
>Efficient, twin entry, centrifugal fans are chosen for each application. The fans have backward or forward curved blades, selected to meet the system resistance and fan characteristics.
Motors
The fan motors are of foot mounted construction, with aluminium casings, all as supplied by a major West European manufacturer to ensure compliance with European standards and C.E. regulations. Motors may be single, two speed or frequency-controlled units. All are manufactured to IP55 standard, class F insulation. To ensure compatibility with existing motors in a particular building, we can standardise our units with motors from the clients existing manufacturer, where suitable motors are available.
Drive
The drive between fan motor and fan is by a multiple V-belt system with taper-lock adapter sleeves for optimum operation, long life and simplicity of maintenance.
Noise Reduction
Sound attenuation modules are available to reduce the volume of noise entering or leaving the building. The attenuators are specifically designed to provide acceptable sound level conditions inside or outside the building, to meet the specified project requirements. The attenuators are fabricated under Bovema’s control, to our own specification, and are manufactured from corrosion resistant materials, being purpose built for each project.
Applications
The LTV is useful for:
- Commercial Buildings;
- Industrial Buildings;
- Hospitals;
- Hotels;
- Swimming Baths;
- Etc.
Specifications
Any combination of modules, from module 1 to module 12, can be selected to make up a standard LTV (with mixed flow air recirculation):
- Weather resistant inlet hood, with stainless steel wire grille;
- Pre-filter;
- Filter;
- Heating element;
- Cooling element;
- Drip tray, plastic;
- Condensate tray and drain, plastic;
- Fan and motor unit;
- Pressure equalisation device;
- Sound attenuator;
- Final filter;
- Warm air recirculation.
Any combination of modules can be selected to make up a direct gas-fired (LTV-GD) air handling unit. The warm air recirculation unit, module 12, is not available. Any combination of modules, from module 1 to module 12, can be selected to make up an indirect gas fired (LTV-GI).
Despatching
The Bovema LTV air handling units are normally delivered as fully assembled units to specified requirements.
Where site requirements are restricted the units may be delivered as individual modules for site assembly.
The standard product is in mill finished natural aluminium. A polyester powder paint finish to any RAL colour selected from the Bovema standard range is also available.
A complete range of ductwork, dampers and air distribution grilles, all as designed and manufactured by Bovema, may be available for suitable projects.
Due to their relatively low weight the LTV air handling units may be installed in most internal or external locations, including installation into glazed or polycarbonate roof light areas.
The weathering flanges for roof or wall penetrations are specifically designed to suit each application and are of fully welded construction to ensure they are completely waterproof.
The LTV can be despatched with:
- Single skin aluminium;
- Double skin thermally insulated aluminium;
- Double skin thermally broken;
- Insulated aluminium;
- Plastic internal housing;
- Plastic double skin.