UM / UM PLUS
Chillers and inverter air / water heat pumps with axial fans
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the pump and of the fan (2 fans on models 12 and 16) according to the value of cooling power at any working conditions
requested by the user.
The INVERTER system allows to reduce the plant’s water content to the minimum, that is from the usual value 12-16 l/kW to 18
liters for the 06 model or to 25 liters (for the 08 model) or to 35 liters for the 12 model and to 45 liters for the model 16, in
ABSOLUTE, of the UM / UM Plus units. Because of the reduced water content, the UM / UM Plus
units can be also installed in
plants without water tank with advantages in terms of the appliance’s reduced size, the installation space, heat loss and
installation and maintenance costs.
5.9
MONITORING AND PROTECTION DEVICES
All units are standard supplied with the following monitoring and protection devices: return water temperature sensor installed at
the return water pipe line from the plant, operating and antifreeze sensor installed at the outlet pipe of the water to the plant,
high pressure transducer, low pressure transducer, compressor’s inlet and outlet temperature sensors, compressors thermal
protection device, fans thermal protection device, water side installed water flow switch to protect the evaporator, high pressure
HP flow switch.
CAUTION: The INVERTER control system is able to manage in the plant the minimum water contents up to a value
of 18 liters for the 06 model, of 25 liters for the 08 model, of 35 liters for the 12 model, and of 45 liters for the 16
model. This value makes reference to the liters absolute value and not to any kW of installed power.
5.10
HYDRAULIC CIRCUIT
The
UM / UM Plus
chillers units are supplied with an integrated hydraulic circuit including: circulating pump with high efficiency
DC brushless motor (EEI
≤
0,23), suitable for chilled water utilization and directly run by a controller on board, plate heat exchanger,
expansion vessel (2 liters), safety valve (6 bar) that have to be connected with a colleting tank, the automatic air release valve and
the flow switch. In the case of V2+ series, there is also a 4-way valve for reversing the flow of the heat exchanger, allowing the
optimization of the yield even in evaporation.
5.11
FAN SPEED CONTROL
This type of control is managed by the microprocessor and is necessary for optimizing
the pressure
of
evaporation/condensation
during
summer/winter
operation in order to allow proper running of the unit.
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AVAILABLE VERSIONS
UM 06-08-12-16
reversible heat pump with integrated hydronic system (expansion vessel, safety valve, pressure gauge,
modulating pump, flow switch, automatic air release valve, load/unload valve).
UM 06-08-12-16 Plus
reversible heat pump with integrated hydronic system (expansion vessel, safety valve, pressure gauge,
modulating pump, flow switch, automatic air release valve, load/unload valve), with antifreezing kit.
Antifreezing kit is made up of an auto-heating cable that wrapped around the base of the unit near the condensing coil and two
PET heaters installed on the sides of the plate heat exchanger.
6.1
OPTIONAL ACCESSORIES
-
Remote control panel to be installed in the room for the unit remote controlling, with additional functions in comparison to
the one installed on board; it can also run our hydronic terminal units.
-
Anti-vibration rubber pad to be installed in the chassis of the unit for possible shock absorption.
-
1” Y Filter
-
Sanitary sensor
-
1” DHW Diverter valve
-
Kit DPI
