5
GENERAL FEATURES
Unit description
This series of
air-water
heat pumps satisfies the heating, coo-
ling and domestic hot water production requirements of autono-
mous or centralized residential plants of medium and large size.
All the units are suitable for indoor installation and can be ap-
plied 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 do-
mestic hot water management. The possibility of solar panels or
other heating sources integration is also available.
The
heating
function optimizes the flow water temperature ac-
cording both to the ambient temperature and to the outdoor tem-
perature through climatic curves adaptable to the building featu-
res. It’s possible to manage a storage tank and two independent
circuits (a direct one and a mixed one).
The
domestic hot water
management allows to control the th-
ree 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 production (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, centrifugal fans (plug 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.
The plate heat exchanger and all the hydraulic pipes are ther-
mally insulated in order to avoid condensate generation and re-
duce thermal losses.
The plug fans with electronic control of the rotational speed gua-
rantee high efficiencies and low noise in all the operating condi-
tions and allow to install the unit indoor (with ducted air inlet and
outlet). It is moreover possible 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.
IP 75 .2 VB AB 0 M 5
Unit identification code
The codes that identify the units and the meaning of the letters used are described below.
Unit type
IP
- Units suitable for hydronic plant in-
stallation operating as reversible heat
pumps
N° compressors
Unit model
Unit version
VB
- Base version
VD
- Desuperheater version
Power supply
1
- 230V - 1 - 50 Hz
5
- 400V - 3 - 50 Hz
Operating range
M
- Medium temperature.
The unit is suitable to produce
water at medium temperature
Refrigerant type
0
- R410A
Acoustic setting up
AB
- Base setting up
AS
- Low noise setting up
HGP
