Ecodan® heat pump technology has been used in conjunction with hydronic modules to create systems for the production of domestic hot water (HWS) and heating water for radiator panels (ATW) which are perfectly compatible with the inclusion of both thermal and photovoltaic solar panels in the installation.  

Systems with electric heat pumps may be used all year round, as their use is not restricted by legislation. The added comfort of being able to use the air conditioning system in spring and autumn is yet another advantage of these VRF systems.  

The indoor units of the VRF CITY MULTI system gently cool and dehumidify the interior space in spring, cool and dehumidify in summer, transferring the extracted heat to both the HWS and ATW hydronic modules, and heat the interior gently at cooler times of day in autumns.  

HWS hydronic modules are ideal for the production of domestic hot water all year round. They make use of the energy drawn from indoor spaces by the VRF indoor units, as well as supplementary energy provided by solar panels in summer and spring.  

ATW hydronic modules provide hot water for radiant panel heating in winter and deliver warm water to heat a pool in summer, contributing to maintaining comfortable temperature conditions and making use of the energy drawn from the indoor space by the VRF indoor units supplemented by heat supplied by thermal solar panels. In systems with this capability, ATW hydronic modules may also be used to deliver refrigerated water to radiant panels in summer. 

The two-stage technology employed in the HWS hydronic module offers a number of significant advantages:  

• R134a refrigerant in high temperature stage. R134a is a pure HFC refrigerant which is harmless for the stratospheric ozone layer and contributes only marginally to the greenhouse effect. This refrigerant is particularly suitable for high temperature applications. 
• R410A refrigerant in low temperature stage. This is also an HFC refrigerant that is harmless to stratospheric ozone, which offers extraordinary efficiency in air conditioning applications. 
• Minimal external energy demand, even when the system is operating in air conditioning mode. The heat drawn from the air is used to heat water. 
• When the system functions predominantly in air conditioning mode – in summer, for example – hot water is produced with extremely low energy consumption. This makes it possible for the system to attain very high COP values. 
• Continuously variable heating power in relation to demand, made possible by the inverter motor scroll compressor, which reduces energy consumption proportionally. 
• Compact dimensions and very light weight. These modules may be mounted on walls, even in intermediate positions. Practically zero floor space usage. 
• Individual thermal energy consumption billing with field devices.