HGA - HGA HT

This series of air-water heat pumps sati- sfies the heating, cooling and domestic hot water production requirements of autonomous or centralized residential plants of medium and large size.

All the units are suitable for outdoor in- stallation and can be applied to fan coil plants, radiant floor plants and high efficiency radiators plants.

The control system allows to manage not only the refrigerant circuit but the whole plant with the possibility to choose different solutions both for the heating and cooling plant and for the domestic hot water management. The possibility of solar panels or other heating sources integration is also available.

The heating function optimizes the flow water temperature according both to the ambient temperature and to the outdoor temperature through climatic curves adaptable to the building features. It’s possible to manage a storage tank and two inde- pendent circuits (a direct one and a mixed one).

The domestic hot water management allows to control the three way valve, the storage tank and the anti-legionella cycles (if necessary).

The cooling function can be realized through “active cooling” (refrigerant circuit inversion). When the unit is used in radiant floor plants, to avoid condensate generation, a room humidity sensor can be installed. During cooling mode operation a part of the heating power in excess can be recovered for the domestic hot water pro- duction (VD version).

The internal programmer clock allows to define different daily switching programs for heating, cooling and domestic hot water production.

The refrigerant circuit, contained in a box repaired from the air flow to simplify the maintenance operations, is equipped with two scroll compressors mounted on damper supports, brazed plate heat exchangers, electronic expansion valve, reverse cycle valve, axial fans, finned coil realized with copper pipes and alluminium fins. The circuit is protected by high and low pressure switches and flow switches on the plate heat exchanger.

The compressors are arranged in tandem on a single refrigerant circuit and  allow the capacity modulation according to the plant requests in order to guarantee a high seasonal efficiency.

(mod. HE) Both the compressors are equipped with vapour and liquid injection and are placed on an economized refrigerant circuit with plate heat exchanger and electronic expansion valve dedicated to the injection.

The plate heat exchanger and all the hydraulic pipes are thermally insulated in order to avoid condensate generation and reduce thermal losses.

The axial fans, equipped with electronic control of the rotational speed, guarantee high efficiencies in all the operating conditions and the possibility to reduce the noise level during the night.

All the units are provided with a phase sequence and correct sequence controller device and with an outdoor temperature sensor in order to realize the climatic control.

All the units are accurately built and individually tested in the factory. Only electric and hydraulic connections are required for installation.

 

Options

Plant side flow rate management

•  not present

•  standard pump

•  high head pump

•  modulating pump

•  high efficiency pump Domestic hot water production

•  not present

•  3 way valve Soft starter

•  not present

•  standard

Accessories

Rubber vibration dampers

Spring vibration dampers

Coil protecion grilles

Remote thermostat (wired or wireless

Remote control (wired or wireless)

Wireless transmitter

Wireless repeater

Condensate sensor

Room hygrostat

Room humidity sensor