Comparato - Generale 2014

Mixing/thermoregulating valves with program

for disinfection against legionella bacterium

controlled by microprocessor

with temperature sensor

FUNCTIONING

FROM 2" TO 3"

Besides all the functions of standard version (see previous page), Diamix L or Compamix L PRO or Unimix L PRO, mixing / thermo-regula-

ting valve has a specific software which allows the servocontrol to make autonomously all processes of thermal disinfection in plants with

recirculation ring and, in this way, the danger of presence and proliferation of legionella bacteria is noticeably reduced. The multiple varia-

bles connected to the realization of plants where this equipment can be installed are so numerous that it is impossible to totally exclude

the risk. This version is completed with two semi-conductor temperature feelers, one to be placed on the mixed way for the normal regu-

lation and one on the final tract of the recirculation ring for sampling during the thermal disinfection process. The disinfection function

can be started manually or can be programmed through a weekly timer whose default value is during the night between Sunday and

Monday at 2:00 AM; statistically this is the most improbable time when users may require water. This function can be frozen if desired. The

disinfection duration derives from plant features because the Legionella bacterium reacts in different ways according to the max. tempe-

rature reached in the final tract of the ring.

The more the temperature increases, the more the duration is reduced:

• higher than 65°C the disinfection lasts 30 minutes

• between 62.5°C and 65°C the disinfection last 1h 30 minutes

• between 60°C and 62.5°C the disinfection last 3h

• between 55°C and 60°C the disinfection last 5h

• lower than 55°C the thermal disinfection cycle cannot be carried out and an error message is displayed.

The system adjusts the duration according to the temperature felt in each moment of the process. The valve is equipped with a relay for

the recirculation pump supply during the disinfection and it has outlet signals to be used in case of malfunctioning for instance if the disin-

fection process fails to be completed because the reached water temperature isn’t sufficiently high. The valve carries out a test to confirm

if the procedure has been executed according to the set criteria. At the end of the disinfection process the valve works again as mixing one.

To avoid burns when opening the water tap while thermal disinfection process it is advisable to install ant-burn safety devices on each

user outlet.

17

USE

Diamix L, Compamix L PRO and Unimix L PRO thermo-

regulating valve is specifically used for: hot sanitary water

mixing in plants with recirculation where it is necessary to

carry out a programmed thermal disinfection.