Operating principle
The electronic mixing valve mixes hot water from storage and cold water from the main supply
to maintain a constant controlled set temperature of mixed water at the outlet. The controller
measures the temperature of the mixed water at the valve outlet with temperature sensor and
modulates the mixing valve position to maintain the desired set temperature. Despite variations
in pressure drop or hot and cold water usage or variations in inlet temperature, the LEGIOMIX
automatically controls the water temperature to meet the temperature setting.
A built-in clock is used to enable optional disinfection cycle programs. The system is disinfected
by raising the water temperature to a specific value for a specific time duration. Using the
recirculation temperature sensor, water returning from the distribution circuits can be measured
for thermal distribution control. This measured temperature is used to check and control the
temperature reached over all or part of the distribution network with this sensor placed at the
end of the recirculation piping circuit.
The LEGIOMIX
can be used to confirm that the correct temperature and time for thermal disinfection
have been reached before taking the appropriate corrective action. All the parameters are updated
every day and logged, with temperatures recorded every hour.
There is an RS-485 connection for
remote monitoring and configuration and, with specific relays, makes alarm signals and controls
available to other interconnected system devices. A Modbus-to-BACnet gateway and inlet
check valves are available separately.
°
C
0
20
80
60
40
LEGIOMIX®
Modbus-to-BACnet Gateway
BACnet
Building Automation System
Modbus
Building Automation System
recirculation sensor
mixed outlet sensor
Modbus-to-BACnet gateway for remote control
The LEGIOMIX
Modbus-to-BACnet gateway, code 755052, allows the transfer of data to a
Building Automation System using BACnet communication protocol.
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