8
ACCESSORIES AND OPTIONAL EQUIPMENT
Options
Storing
and pumping
module
Standard pump
Allows the circulation of the water on the plant side.
High head pump
Allows the circulation of the water on the plant side and guarantees a higher avai-
lable static head, suitable for high pressure drop plants.
Modulating pump
Allows the circulation of the water on the plant side with the possibility to set the
rotational speed of the pump in order to get the requested flow rate without the
necessity to install other setting devices.
Tank and
standard pump
Allows the circulation of the water on the plant side.
The thermal inertia of the buffer tank allows to reduce the number of compressor
starts and to guarantee a more stable flow temperature.
Tank and
high head pump
Allows the circulation of the water on the plant side and guarantees a higher avai-
lable static head, suitable for high pressure drop plants.
The thermal inertia of the buffer tank allows to reduce the number of compressor
starts and to guarantee a more stable flow temperature.
Tank and
modulating pump
Allows the circulation of the water on the plant side with the possibility to set the
rotational speed of the pump in order to get the requested flow rate without the
necessity to install other setting devices.
The thermal inertia of the buffer tank allows to reduce the number of compressor
starts and to guarantee a more stable flow temperature.
Electrical
heaters
Antifreeze
Activated together with the antifreeze electrical heater of the plate heat exchanger,
it has the task to keep the water in the buffer tank at a temperature high enough to
avoid ice generation during winter.
Integrative
Integrate or replace the heating power supplied by the heat pump and are managed
by the unit controller with a 2 step logic.
They are also activated as antifreeze electrical heaters.
Available only for the VA version.
Soft starter
Reduces the compressor start current.
Compressor power factor correction
Allows to reduce the phase shift between the absorbed current and the power sup-
ply voltage keeping it above the value of 0,9.
Fans control
Modulating control
(condensation / evaporation
control)
The fans rotational speed can be modulated continuosly by an inverter to control
the condensation pressure (in cooling) and the evaporation pressure (in heating)
in order to extend the operating limits of the unit and to reduce noise emissions.
Electrical loads
protection
Fuses
Allows to protect the electrical loads with fuses.
Thermal magnetic
circuit breakers
Allows to protect the electrical loads with thermal magnetic circuit breakers simpli-
fying the maintenance operations.
Hydraulic scheme
VB unit
VA unit
VP unit
ITEM
DESCRIPTION
P
PUMP
PD
DIFFERENTIAL PRESSURE WATER
S
STORAGE TANK
SA
WATER DRAIN VALVE
SF
VALVOLASFIATO AIR
SIW
PROBE WATER INLET
SP
HEAT EXCHANGER
SUW
PROBE WATER OUTLET
VE
EXPANSION TANK
VS
SAFETY VALVE
E
V
T
U
O
P
S
SUW
SIW
SUW
SIW
VB
VA
VP
N
I
PD
T
U
O
P
S
F
S
A
S
S
S
V
N
I
PD
P
E
V
SUW
SIW
T
U
O
P
S
N
I
PD
P
E
V
T
U
O
P
S
SUW
SIW
SUW
SIW
VB
VA
VP
N
I
PD
T
U
O
P
S
F
S
A
S
S
S
V
N
I
PD
P
E
V
SUW
SIW
T
U
O
P
S
N
I
PD
P
E
V
T
U
O
P
S
SUW
SIW
SUW
SIW
VB
VA
VP
N
I
PD
T
U
O
P
S
F
S
A
S
S
S
V
N
I
PD
P
E
V
SUW
SIW
T
U
O
P
S
N
I
PD
P