Model CA2 / CA2VQ
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The green and friendly entrance Comfort air curtains Model CA2

Energy saving and userfriendly air curtain Model CA2 is the newest addition to the series Biddle comfort air curtains. It is Biddle’s conviction that with this successor to the successful air curtain model CA, it has developed the most energy saving and user-friendly air curtain in the market. In shops with open doors, model CA2 provides for a comfortable shopping climate. For commercial reasons many shops and public buildings often have their doors open, inviting passers-by to enter. But an open door disturbs the climate inside and a lot of energy is lost. Because of the commercial...

Unsurpassed convenience The operation and energy efficiency of an air curtain is largely determined by the correct installation. In actual practice this is often underestimated and therefore model CA2 offers great ease of installation, but also the convenience for the user is unsurpassed. Installer-friendly: easy to program • The touch screen of the control panel shows all important settings of the air curtain. The installation menu offers step-by-step directions for the correct settings. Only a small number of settings need to be programmed. • The air curtain with water heating coil is...

Various options Type code CA2 S-200-W-F CA = Controlled Air strength Technology Model CA2 can be supplied in four different capacities: S(mall), M(edium), L(arge) and XL (Extra Large). These series are suitable for door heights of 200 to a maximum of 380 cm. The higher the capacity the higher the air curtain can be mounted. All types are available in four sizes: 100 - 150 - 200 and 250 cm. By mounting more units next to each other doorways wider than 250 cm can be served. Types Types S = Small (200 - 240 cm) M = Medium (220 - 280 cm) L = Large (250 - 330 cm) XL = Extra Large (300 - 380 cm)...

Control and operation Electronic control system Model CA2 with water coil has as a standard an integrated air and water control unit and a motor-controlled three-way valve installed. The valve is operated by the electronic control system in the unit. In air curtains with an electric heat exchanger the energy supply to the heat exchanger is determined by an electric power control. The operating system of the air curtain consists of the control panel and a printed circuit board. The in- and outputs of the printed circuit board are connected to a connector plate at the top of the unit, which...

Energy saving air curtain technologies In model CA2 three Biddle air curtain technologies have been combined. This renders the comfort air curtain to the most energy saving and most user-friendly in its kind. Under all conditions the best possible continuous operation of the air curtain is guaranteed: energy-saving and optimum climate separation with the best comfort. To achieve this the air curtain must meet the following conditions: 1. Sufficient strength (for an efficient climate separation) - the entire doorway is screened off to the floor. 2. Sufficient heating capacity (for optimum...

2. CA- technology for the correct outlet width The strength of an air curtain is determined by the air speed and the outlet width, which are effected by the CA technology. CA stands for Controlled Air strength Technology. Model CA2 has six different speeds each having its own outlet width. As soon as the air curtain is put into a higher speed, the outlet width is automatically adjusted to the climatologic situation around the door entrance. The air volume and the air speed are increased as far as necessary. The air does not collide with the floor and so the heat is solely used to heat the...

3. CHIPS-technology for sufficient heat and strength CHIPS means: Corrective Heating and Impulse Prediction System With changing weather conditions and insufficient attention to or knowledge of an air curtain, it still frequently occurs that an air curtain is not properly set. It blows often too strong or too weak, with an outlet temperature that is too high or it is not switched on at all. As a result there is energy loss, little comfort and an unnecessarily high noise level. Exactly because air curtains are intended to save energy and provide a high degree of comfort, Biddle has developed...

Operation automatic CHIPS-control Not only weather conditions such as the outside temperature, wind velocity and wind direction change at any time of the day, but the indoor climate changes too because of lighting, use of doors and frequency of customer visits. Therefore the air curtain has to adapt itself continuously to these changing conditions. Three sensors ensure that model CA2 is supplied with all details regarding the climate outside and inside near the doorway. This information is translated by the CHIPS-control into the correct setting of the air curtain and shown in the b-touch...

The correct selection An air curtain functions well if it covers the entire doorway and has sufficient heat capacity to bring the incoming cold air to a comfortable temperature. The selection of the right type of air curtain depends on door height and door width and of the volume of natural ventilation through the open door. 1. Door height (from floor to bottom of unit) and door width Based on these known data an air curtain can easily be selected from the table on this page. It is important for the distance between the air curtain and the door to be as small as possible. In addition, the...

Explanation technical data Selection boiler capacity For the selection of the CH-boiler one can take the heating capacity in speed 6 at an outlet temperature of 40 °C. If a CH-boiler is available, usually no extra extension is needed, because more than 90 % of the heat produced by the air curtain benefits the climate indoors. Maximum heating capacity For the maximum heating capacity in the tables on pages 12 - 15 the heating capacity for each unit has been taken at speed 6 with an output temperature of 50 °C. Water volume mw = water volume [l/h] Q = heating capacity [kW] value) (table ρw =...