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22.11 – 5806712_07
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PRODUCT DESCRIPTION
Multipurpose external units designed for 2 or 4-pipe systems. With just one unit
simultaneous and independent requests for hot and chilled water can be accom-
modated all year round.
SYSTEM TYPES
2-pipe system
The multipurpose 2-pipe units have been made to respond to the demands of ho-
tels, where there is a high cold/hot water and DHW demand throughout the year.
The operating modes are:
1.
SUMMER OPERATION
Cold water production at system.
Production of DHW with use of total recovery device.
NO ANTI-LEGIONELLA CYCLE
2.
WINTER OPERATION
Heat pump supplying the system.
Heat pump for DHW.
4-pipe system
The multipurpose 4-pipe units have been made to respond to the demands of
shopping centres, offices or facilities with large windows, where there can be the
simultaneous demand for hot and cold water with a system which does not require
season changeover and therefore is a valid alternative to traditional systems based
on the chiller-boiler combination.
The microprocessor control logic mounted ensures perfect satisfaction of heating
and cooling loads.
The operating modes are:
1.
PRODUCTION OF COOLED WATER ONLY
The multipurpose unit acts as a classical chiller: cool water to the system and con-
densation heat disposal outside through finned coils.
2.
PRODUCTION OF HOT WATER ONLY
The multipurpose unit acts as a heat pump, exploiting the heat of the outside air it
makes use of the finned coil (evaporator) to raise the temperature of the water to be
sent to the system through a plate heat exchanger (condenser).
The main difference with respect to traditional heat pumps with cycle inversion is
that the heated water is produced in an exchanger different to that used for the
production of cold water.
This is to keep the heating and cooling sections necessary for 4-pipe systems well
distinguished.
3.
COMBINED PRODUCTION
If the utility requires simultaneous hot and cold water, the unit acts as a water/
water heat pump, controlling condensation and evaporation on two distinct plate
heat exchangers associated to the circulation of cold and hot water in the system.
It automatically changes from one configuration to the other (managed by on-
board microprocessor) to optimise the energy spent depending on the demand
by the utility.