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Hot water central heating systems for boats and yachts work on a similar principle to domestic central heating, heating both the interior and the water used on board.
Energy generated is distributed through heat exchangers to heat either the water or the interior, individually or at the same time. To keep noise to a minimum the operating output level is kept as low as possible, rising according to the requirements of thos onboard. For example, the unit will run at full tilt when hot water for showering and the galley are needed.
On-board heating systems run from the boat’s diesel supply. In order to reduce diesel consumption during start-up, the system uses high-quality ceramic technology for the glow element. The element also acts as a flame monitor by telling the control unit whether ignition was successful and if the flame is burning correctly.
The device can be operated in a number of ways, including radio remote control and a security-coded remote system that can be used from any telephone.
Heating systems can be tailored to the needs of your boat. They come in a range of models models and can be installed without heating functions to provide air conditioning and ventilation.
In the compact hot-air heating systems the air is passed directly over the burner and heated. An integrated electrical ventilation unit with low electricity consumption provides the air circulation. Intake is regulated by flow technology to ensure quiet operation when onboard and the heating units are installed below decks. An electrical ventilation unit provides air circulation.
Dual water and air heating systems do not heat the air directly but use a closed water-heating system like domestic central heating.
AIR CONDITIONING SYSTEMS
BlueCool Select Air Conditioner
In this system the air is drawn through the evaporator by remote mounted split-air modules connected to the air transition box by special smoothbore insulated ducting. This principle allows a reduction in duct diameter to between 80 and 100 mm and duct lengths of up to 6/8 meters. In a typical set-up one, two or three blower modules are controlled directly by the main digital panel and situated in the main salon or cabin. One or more secondary blower modules are placed in other cabins. These secondary blower modules have their own independent blower speed control which allows the occupants of these cabins to control their own environment.
BlueCool Classic Air Conditioner
All air-conditioning units based on hermetic compressors function on the same principle: a compressor acts on the refrigerant gas which is then condensed to liquid when passing through a sea-water cooled condenser. After that the liquid refrigerant is injected through a small nozzle and evaporates. This evaporation process produces the refrigeration effect. The evaporation takes place in a tubular finned coil (also called evaporator coil). A blower draws the air through the evaporator coil. While passing through the evaporator the temperature of the air is lowered by approximately 15 °C. The self-contained units are extremely compact and include on one single base all the components (i.e. compressor + condenser + evaporator + blower), necessary to cool a cabin, salon/lounge or other volume. The BlueCool Classic units are available in several capacities allowing to match almost all specific volume requirements of the yacht.
Heat cycle
It is also possible to produce heat with an air-conditioning unit. For this purpose a 4-way reversed cycle valve is added. During heat cycle operation, the sea-water condenser effectively becomes the evaporator and cools down the sea-water. The finned evaporator becomes the condenser and produces heat to approximately 45/50° C. Heat cycle becomes inefficient when the outside water temperature drops below roughly 6° C.
BlueCool Premium Air Conditioner
Whenever three or more independent volumes in a yacht need to be air-conditioned, it is worth considering a central chiller system, BlueCool Premium. To distribute refrigeration capacity over several independently operated air-handlers from one single central cooling unit, the most flexible and simple solution is to install a chilled water circulation system between the central unit and the air-handlers. This mixed water/glycol circuit is maintained at approximately 4° C.
All Webasto chiller units are equipped with high efficiency multi-plate exchangers. Temperature regulation of the central chiller unit only affects the water temperature, regardless of the number of active air-handlers. Air-handlers/blowers can therefore be slowed down or even stopped completely without any effect onthe normal operation of the central chiller unit. By slowing down blower speed or stopping selected air-handlers altogether, effective capacity transfer to the other active air-handlers is achieved. This makes it possible to install over-capacity in specific locations to cope with particularly difficult conditions, such as wheelhouses with excessive glass areas.
Voltage frequency
All Scroll/Rotary compressor units are dual-frequency 50/60 Hz; when running under 60Hz cooling capacity is increased by approximately 10 per cent.
As with 30000 BTU, all single compressor as well as the multi-compressor units can be delivered in 3 ph 400V at 50/60 Hz (Scroll). Other Voltages such as 208 – 3 Phase 60Hz can also be delivered for certain models – please contact us for more details.
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