Hitachi air source heat-pump boiler. Cooling and heating applications

HITACHI air conditioning Aqua-FREE system is a air source Heat pump Heating system for winter, and a partial cooling system for summer. The system consists of an Inverter Heat Pump outdoor unit and a hydraulic module indoor unit. The heat pump absorbs heat from outside and send it to the module or sends heat to the outside, and transfers the cooling to the water circuit by means of the Aqua-FREE module.   The Aqua-FREE air-conditioning system incorporates a set of technical benefits that make it one of the most attractive on the market. Right from the selection of the ideal type of equipment in each case, up to its maintenance, and through installation, start up and operation, Aqua-FREE always provides the best solution for every user, and greatly simplifies and eases the user’s selection process.     AquaFREE air source heat-pump systems provide great comfort, high reliability, rigorous design, low electrical consumption, and a small installation space. Types of Applications include: Radiant floor, radiators, hybrid radiators + radiant floor systems, and pool heating applications.   Easy to install   The Hitachi Aqua-free air source heat pump boiler is a self contained unit which only requires water and electric connections. Water pipe size is 22mm and electrical feed required is 16 amp / "B" type MCB. The unit must be sighted outdoors either on a wall bracket or floor mounted. These units can be fitted by electricians, plumbers, heating engineers and air conditioning engineers. Furthermore it is supplied as a sealed system so it does not have to meet the new F-Gas Regulations. As a result the developer does not have to find specialist refrigerant handlers to install the equipment. Hitachi Aqua-free is straightforward to install, using normal plumbing skills.

How air source heat pumps work

Where it is not possible to drill in a ground probe or install a surface ground loop on the property, an air source heat pump may well be the answer. The only space requirement is an outside wall making them ideal for apartments and homes with limited outside space. With no need for ground works, installation costs are kept to a minimum. Air source heat pumps work by converting the energy of the outside air into heat, creating a comfortable temperature inside the house as well as supplying energy for the hot water system. As with all heat pumps, air source models are most efficient when supplying low temperature systems such as under-floor heating. The efficiency of an air source heat pump is measured in Coefficient of Performance (CoP). A CoP of 4 means that for every kilowatt of electricity put in, you get 4 kilowatts of energy in the form of warm water. The flow temperature of the warm water is typically between 35˚C and 45˚C; much lower than achieved by a domestic boiler. The units are perfectly capable of generating higher temperatures but the CoP suffers meaning the economic and ecological benefits may be affected. Keeping the temperature at the lower end of the scale keeps the system operates at maximum efficiency.