PACKAGED - AIR TO WATER / CAHV - DOMESTIC HOT WATER

CAHV

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The Ecodan® - Packaged HWHP (Hot Water Heat Pump) system consists of a monoblock air condensing outdoor unit which produces very high volumes of high temperature hot water.

Technology

The “Flash-Injection Circuit” developed for the VRF CITY MULTI ZUBADAN Y system (a heat pump system for very cold climates) is installed in the new CAHV packaged Hot Water Heat Pump system.

By using this advanced injection system and highly efficient compressors, the CAHV packaged system can deliver high temperature hot water at up to 70°C, and ensures less performance and capacity loss at very low outdoor temperatures.

Packaged AtW heat pumps for hot water

Mitsubishi Electric has been designing and manufacturing packaged heat pumps for hot water for the commercial sector since 1970.

Mitsubishi Electric was one of the first manufacturers in Japan to use heat pump technology to produce hot water.

Mitsubishi Electric was also the first manufacturer to develop a range of solutions operating with R407C.

Even the first of these units were already capable of producing high temperature hot water at up to 70°C, which is high enough to instantaneously neutralise legionella bacteria.

Our products are still used today in industrial processes requiring high volumes of high temperature water.

Our Hot Water Heat Pump systems are used in commercial applications such as hotels and in hospitals and clinics, testifying to their superior reliability.

As the leading manufacturer of domestic hot water production systems, we are proud to present the efficient “Air to Water” packaged heat pump system.

Class beating heating capacity

The CAHV packaged system offers unrivalled flexibility with 2 operating modes to cater for every possible need: “Efficiency Mode (COP)” and “Capacity Mode”.

The system is capable of delivering a maximum capacity exceeding 70 kW in Capacity mode, while Efficiency mode (COP) is extremely effective for maximising energy efficiency in all operating conditions and, as a consequence, reducing CO 2 emissions.

Efficiency mode (COP)

Capacity Mode

Operation guaranteed at temperatures as low as -20 °C

The CAHV packaged system is capable of operating at outdoor temperatures from -20°C to 40°C.

The system produces high temperature hot water (65°C), even on the coldest days of the year.

In the defrost cycle, the two compressors of the system operate in alternation to limit the drop in delivery temperature.

Backup Function and Rotation Function

The “Backup*” function of the CAHV packaged system ensures superior reliability.

If one of the two DC Scroll Inverter compressors equipping the individual system fails, the other compressor continues to operate to prevent the discomfort caused by the system shutting down completely.

In this state, however, the thermal capacity of the system is obviously halved.

The “Rotation” function is another key solution ensuring uniform operation and maximising the life span of all the compressors in CAHV packaged systems in multiple configurations.

In an installation with two or more systems, the individual systems operate in alternation if the thermal demand does not require the systems to function simultaneously.

Cascade systems

For applications with demands for very large volumes of hot water production, a flexible, modular thermal power installation may be created with up to 16 CAHV packaged systems, for a maximum output of up to 720 kW.

This installation solution offers superlative modulability, as each individual system is equipped with two DC Scroll Inverter compressors, ensuring that the thermal power is adjusted progressively and with extreme precision in relation to the effective demand for hot water.

This optimises the operation of the entire installation, with only a portion of the CAHV packaged installation operating in mid-load conditions and during spring and autumn.

A malfunction of one or more CAHV packaged systems does not compromise the operation of the other systems in the installation, ensuring safety and uninterrupted operativity.

High overpressure fans

The new fan technology employed in the CAHV packaged system means that it can also be used to create ducted installations, further increasing the installation flexibility of the system.

The static external pressure of the fans is settable from 0 Pa to 60 Pa.

Remote control via external contacts

The wide choice of analogue and digital inputs and digital outputs available on the electronic board of the system makes it possible to control the system remotely from a BMS, a timer or external contacts.

The following are just some of the available input signals:

  • Operating mode and hot water production temperature setpoint selection, choosing between “Heating Mode” and “ECO Heating Mode”. The latter of these two modes is particularly advanced, as it uses the outdoor air compensation curve to automatically determine the water delivery setpoint.
  • Operating mode and hot water production temperature setpoint selection, choosing between “Domestic Hot Water Mode” and “Heating Mode”. This means that two different water temperature setpoints are settable: a higher value for domestic hot water production and lower value for heating. This improves performance at partial loads, as DHW is only produced when requested.
  • Select between “Efficiency Mode (COP)” and “Capacity Mode” for the unit. The operation of the system may be optimised in relation to demand, increasing power or performance depending on the specific case.
  • Select ON/OFF state in relation to signals received from flow regulator switch and circulation pump, for increased protection of the hydronic circuit and to ensure that the system functions correctly.

The following are just some of the available output signals:

  • A digital output may be activated at a selectable minimum water temperature to start a thermal power generator (boiler, thermal solar panel etc.) to substitute the system when the system is in OFF state.
  • Unit defrost signal.

The result is extraordinary control flexibility either locally, using the dedicated PAR-W21MAA remote controller, or remotely, using external contacts.

Control and monitoring functionality with centralized WEB Server controllers

The CAHV packaged system is capable of interfacing via the M-Net data transmission bus with the WEB Server 3D Touch and 3D Blind Controller centralized controllers of the VRF CITY MULTI control system range.

Depending on the application, the CAHV packaged system may be interfaced with a VRF CITY MULTI system to optimise operation when catering for hot water, heating and air conditioning demands, or, alternatively, to manage, monitor and supervise the system in stand-alone configuration for applications requiring solely the production of large volumes of hot water.

In both cases, the system may be controlled either from the 10.4” backlit, touch screen colour display of the 3DT controller, or via the internet using the Web pages of either centralized controller.

Documentation

  • Technical data sheet
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  • General Catalog

    Full Product Line Catalogue

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