Function
The electronic mixing valve is used in centralized
systems that produce and distribute domestic hot
water. It maintains the temperature of the domestic hot
water delivered to the user when there are variations in
the temperature and pressure of the hot and cold water
at the inlet or in the draw-off flow rate. The LEGIOMIX®
electronic mixing valve provides precise temperature
control over very low and very high flow rate demand,
minimal pressure drop with a ball valve control element,
automatic self-cleaning to prevent scale formation and
easy-to-use digital interface with data logging, alarming
and status indication. The LEGIOMIX® electronic mixing
valve is furnished with a controller with LCD user
interface that provides a set of programs for circuit
thermal disinfection to kill Legionella. The controller is
configurable via keypad, or local or remote computer. Depending on the type of system and habits of
the user, temperature levels and operation times can be programmed as desired. In addition, it comes
standard with monitoring and remote control connections.
The LEGIOMIX® 6000 series electronic mixing valves meet the requirements of ANSI/NSF 372-2011
and are certified to ASSE 1017, CSA B15.3, UPC, IPC, Low Lead Laws and listed by ICC-ES for use
in accordance with the U.S. and Canadian plumbing codes.
LEGIOMIX® electronic mixing valve
6000 series
© Copyright 2017 Caleffi
H0002997
www.caleffi.com
INSTALLATION AND COMMISSIONING MANUAL
Product range
6000 series Electronic mixing valve with programmable thermal disinfection and male NPT
connections..............................................................................................sizes 1”, 1¼”, 1½” & 2”
6000 series Electronic mixing valve with programmable thermal disinfection and sweat
connections..............................................................................................sizes 1”, 1¼”, 1½” & 2”
NA10520 Modbus-to-BACnet gateway
1
Leave this manual for the user.
CAUTION: If the electronic mixing valve is not installed, commissioned and
maintained properly, according to the instructions contained in this manual, it
may not operate correctly and may endanger the user.
CAUTION: Make sure that all the connecting pipework is water tight.
CAUTION: When making the water connections, make sure that the pipework
connecting the LEGIOMIX® electronic mixing valve is not mechanically overstressed.
Over time this could cause breakages, with consequent water losses which, in turn,
could cause harm to property and/or people.
CAUTION: Water temperatures higher than 100ºF (38ºC) can be
dangerous. During the installation, commissioning and maintenance
of the LEGIOMIX® electronic mixing valve, take the necessary
precautions to ensure that such temperatures do not endanger people.
CAUTION: To prevent any damage which will cause the electronic mixing
valve to not operate correctly, treat highly aggressive water before entering
the electronic mixing valve. Be sure water hardness is less than 10 grains.
SAFETY INSTRUCTION
CAUTION: All work must be preformed by qualified personnel trained in the
proper application, installation, and maintenance of systems in accordance
with all applicable codes and ordinances.
This safety alert symbol will be used in this manual to draw attention to safety related
instructions. When used, the safety symbol means ATTENTION! BECOME ALERT! YOUR
SAFETY IS INVOLVED! FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT
IN A SAFETY HAZARD.
CAUTION: IMPORTANT: Risk of electric shock. The back panel and mixing valve
contain live circuits. Cut off the electric supply before performing work. Failure to follow
these instructions may result in injury of persons or damage to property.
CAUTION: When turning on confirm the desired language. English is the
default language. But, if not selected after 1 minute, the menu will go directly to
the date and time choice. Language can then be selected always in “settings”.
2
CAUTION: Safety measures must be in place before engaging disinfection
mode. Anti-scald protection devices, certified to ASSE 1016 or ASSE 1070,
at all downstream fixtures, must be installed.
ATTENTION: Lorsque vous effectuez les raccordements d'eau, assurezvous que la tuyauterie reliant le LEGIOMIX® mitigeur électronique n'est pas
mécaniquement des overstressed. Au fil du temps, ceci pourrait causer des
ruptures, avec pour consequence des pertes en eau qui, à leur tour, peuvent
causer des dommages à la propriété et/ou les gens.
Ce symbole d'avertissement servira dans ce manuel à attirer l'attention sur la sécurité concernant
instructions. Lorsqu'il est utilisé, ce symbole signifie.
ATTENTION! DEVENEZ ALERTE ! VOTRE SÉCURITÉ EST EN JEU ! NE PAS SUIVRE CES
INSTRUCTIONS PEUT PROVOQUER UN RISQUE DE SECURITE.
ATTENTION: Tous les travaux doivent être effectués par du personnel
qualifié formé à la bonne application, installation et maintenance des systèmes
conformément aux codes et règlements locaux.
ATTENTION:
Si le réducteur de pression, mitigeur électronique, n'est pas installé,
mis en service et entretenu correctement, selon les instructions contenues dans ce
manuel, il peut ne pas fonctionner correctement et peut mettre en danger l'utilisateur.
ATTENTION: S'assurer que tous les raccordements sont étanches.
ATTENTION: Les températures de l'eau supérieure à 100°F (38°C) peut
être dangereux. Au cours de l'installation, mise en service et l'entretien de
le réducteur de pression, le LEGIOMIX® mitigeur électronique, prendre les
precautions nécessaires afin de s'assurer que de tells températures ne
compromettent pas les gens.
ATTENTION: Risque de choc électrique. Le fond d’armoire et la vanne
mélangeuse sont sous tension. Couper l’alimentation électrique avant toute
intervention. Le non respect de ces règles de sécurité peut entraîner des dégâts
matériels et/ou des blessures aux personnes.
ATTENTION: Pour prévenir tout dommage qui provoque le mitigeur
électronique à ne pas fonctionner correctement, le traitement de l’eau très
agressive avant d’entrer dans la vanne de mélange électronique. Assurezvous que la dureté de l’eau est inférieure à 10 grains.
ATTENTION: Lors du passage de confirmer la langue désirée. L’anglais est la langue per
défault. Si la langue n’est pas sélectionnée après 1 minute, le menu Aller directement à la date
et l’heure de choix. La langue peut alors être sélectionné toujours dans “Paramètres”.
LAISSEZ CE MANUEL AVEC L’UTILISATEUR
3
ATTENTION: Des mesures de sécurité doivent être en place avant d’engager
le mode de désinfection. Les dispositifs de protection anti-brûlure, certifié à ASSE
1016 ou 1070 l’ASSE, à tous les appareils en aval, doit être installé.
CONSIGNE DE SÉCURITÉ
Technical specifications
Valve body
Materials: - Body: DZR low-lead brass
- Ball: low-lead brass, chrome-plated
- Hydraulic seals: peroxide-cured EPDM
Max working pressure (static): 150 psi (10 bar)
Max. inlet temperature: 212°F (100°C)
Temperature gauge scale: 30 - 210°F
Suitable fluids: water
Max. water hardness: 10 grains
Main connections: -NPT male and sweat union
1", 1¼", 1½" and 2"
Actuator, 3-wire floating
Electric supply: 24 VAC - 50/60 Hz
Power consumption: 6 VA
Protection cover: self-extinguishing VO
Protection class: IP 65 (NEMA 4/4X)
Ambient temperature range: 14 – 130°F (-10 – 55°C)
Electric supply cable length: 31½” (0.8 m)
Controller, LCD user interface/display
Materials: - Housing: self-extinguishing ABS, color white RAL 1467
- Cover: self-extinguising SAN, smoked transparent
Electric supply: 24 VAC - 50/60 Hz
Power consumption: 6.5 VA
Adjustment temperature range: 70 – 185°F (20 – 85°C)
Disinfection temperature range: 100 – 185°F (40 – 85°C)
Ambient temperature range: 32 - 120°F (0 – 50°C)
Protection class: IP 54 (wall mounting)
(Class II appliance)
Contact rating (R1, R3, R4): 5 A resistance, 2 A inductance / 24 V
Mixing valve control: 5 A resistance, 2 A inductance / 24 V
Alarm relay (R2): 5 A resistance, 2 A inductance / 24 V
Fuses: 1 (main): 80 mA
Fuses: 2 (mixing valve): 1 A
Charge reserve: 15 days in the event of electric supply failure,
with a 3 cell rechargeable 3.6 V 140 mAh buffer battery
Battery recharging time: 72 hours
Approvals: CE, FCC part 15
Temperature sensors
Body material: stainless steel
Type of sensitive element: NTC
Working temperature range: 14 – 260°F (-10 – 125°C)
Resistance: 1000 Ohms at 77° F (25° C)
Time constant: 2.5
Max. distance for mixed outlet or return (recirculation) sensor:
500 ft (150 m) cable 2 conductor x AWG 18
800 ft (250 m) cable 2 conductor x AWG 14
4
Recommended Flow Rates (gpm/lpm)
Size 1" 1¼" 1½" 2"
Minimum* 3.1 / 11.7 4.4 / 16.6 6.6 / 25 8.8 / 33.3
Maximum 93 / 352 109 / 413 150 / 568 212 / 803
Cv 21 24 34 47
*to ensure stable operation and ± 3º F accuracy.
Minimum flow rate is 0 gpm when recirculation flow rate
is greater than or equal to the valve size minimum flow
rating.
Mixing valve performance
Accuracy: ± 3º F (± 2º C)
Max. operating differential pressure (dynamic): 75 psi (5 bar)
Max. ratio between inlet pressures (H/C or C/H): 2.1
Characteristic components
°C
0
20
80
60
40
1
3
2
6
4
5
7
THURSDAY
T
M127
•
F TR120•F
ADJUSTMENT
RUNNING
1) Legiomix digital regulator
2) Mixing valve
3) Mixing valve actuator
4) Mixed water flow probe
5) Return probe (rec irculation)
6) Mixed water flow temperature gauge
7) Ac tuator fixing c lip
1) LEGIOMIX® digital controller
2) Mixing valve
3) Mixing valve 24 V 3-wire floating actuator
4) Mixed outlet water temperature sensor
5) Return water (recirculation) temperature strap-on sensor
6) Mixed outlet water temperature gauge
7) Actuator mounting clip
30
50
70
90
110
130
150
170
190
210
F
10/12/2017
+
-
Package contents
• Digital controller, consisting of housing and base for electric connection
• DIN bar and mounting wall anchors
• Mixing valve
• Actuator
• Mixed outlet water temperature sensor
• Return water temperature strap-on sensor
• Spare fuses
• Installation and commissioning manual
5
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 is available separately.
°C
0
2
0
8
0
6
0
4
0
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 NA10520, allows the transfer of data to a
Building Automation System using BACnet communication protocol.
6
IMPORTANT: Risk of electric shock. The back panel and mixing valve contain live circuits.
Cut off the electric supply before performaning any work. Failure to follow these instructions
may result in personal injury or damage to property.
7
OkMenuShock
Ok
Mixed °C Return °C
TUESDAY 1 / 02/ 2017
ADJUSTMENT
IN PROGRESS
°C
0
20
80
60
40
30
50
70
90
110
130
150
170
190
210
F
Relay contacts
Relay 1
Relay 2
Relay 3
Relay 4
FLUSH VALVES
(reduce temperature)
2nd THERMOSTAT
(aquastat)
ALARM
(unsuccessful
disinfection cycle)
RECIRC PUMP
(disinfection)
RS485 MODBUS 2-WIRE
COMMUNICATION*
24 VAC
OPTIONAL MODBUS/
BACNET GATEWAY
ETHERNET TO LAN
24 VAC FLOATING CONTROL
MIXED OUTLET WATER
TEMPERATURE SENSOR
RETURN WATER
TEMPERATURE STRAP-ON SENSOR
*RS485 ModBus is integral to the
controller. It may be used directly
and requires “mapping” by the
user to access the data, OR,
Optional gateway converts
ModBus data to BACnet data,
available to BAS (or any BACnet).
A0
A1
A2
A3
A4
A5
A6
A7
B0
B1
B2
B3
B4
B5
B6
B7
SPL
RUN
ERR
RX
TX
PWR
GND
Rx/Tx/+
+PWR
-PWR
FRAME GND
RELAY 1, 2, 3, 4
Back panel
PIN
disable
Reset
Appliance fuse
80 mA-250Vdelayed
Mixing valve fuse
1 A - 250 V delayed
Relay contacts
Electric
supply
24 V
Mixing
valve
Battery connected
Battery disconnected
Battery connection
Thermal shock
activation
Shock
enabled
Shock
disabled
(factory setting)
Temperature
sensors
Mixed outlet
Return
Common
Relay 1
Relay 2
Relay 3
Relay 4
Closes
Common
Opens
Earth
Earth
Neutral
Live
PIN code
disabling button
Reset button
Screw to close
the front cover
with hole
for lead-sealing
RS485
Interface
terminal
Microswitch
for enabling
thermal shock
function
Temperature
sensor terminal
Battery
To remove the electrical wiring base, turn it round and extract it from its housing.
–
+
Connecting temperature sensors:
The cable connecting the mixed temperature outlet and return temperature sensors must be installed in a dedicated raceway. If the connection cable shares
the raceway with other live cables, an earthed shielded cable must be used.
In case of reverse polarity or power failure the system enters the BATTERY
ALARM STATUS, see “Alarms” section.
Buttons and terminals on side view
The base has two buttons, which can be accessed by opening the front cover:
-Reset button
-PIN code disabling button
side view
8
ºF ºC Ω ºF ºC Ω ºF ºC Ω ºF ºC Ω
-5 -20 100254 60 15 15310 130 54 3049 200 93 829
5 -15 72937 70 21 11882 140 60 2489 210 99 702
15 -10 53669 80 27 9297 150 65 2044 220 104 598
25 -4 39919 90 32 7333 160 71 1688 230 110 511
32 0 32648 100 38 5827 170 77 1402 240 115 439
40 4 26100 110 43 4664 180 82 1171 250 121 378
50 10 19900 120 49 3758 190 88 983
Temperature sensor resistance values
Location of cable connectors
1
3
4
5
6
7
9
8
2
When making the electrical
connections, follow this sequence
for wiring the terminal strip and
tightening the seals:
1. Power supply*
2. Mixing valve control*
3. Mixed outlet temperature sensor
4. Return temperature sensor
5. RS485
6. Relay 3
7. Relay 1
8. Relay 4
9. Relay 2
Strain relief cord connectors (white)
are provided for all 9 controller
housing holes. Clear plastic plugs
also provided for unused holes.
*Factory pre-wired.
Enabling functionsDipswitch settings
-Thermal Shock enable/disable.
-Internal battery (do this during
installation)
PIN
disable
Reset
Appliance fuse
80 mA-250Vdelayed
Mixing valve fuse
1 A - 250 V delayed
Relay contacts
Electric
supply
24 V
Mixing
valve
Battery connected
Battery disconnected
Battery connection
Thermal shock
activation
Shock
enabled
Shock
disabled
(factory setting)
Temperature
sensors
Mixed outlet
Return
Common
Relay 1
Relay 2
Relay 3
Relay 4
Closes
Common
Opens
Earth
Earth
Neutral
Live
PIN code
disabling button
Reset button
Screw to close
the front cover
with hole
for lead-sealing
RS485
Interface
terminal
Microswitch
for enabling
thermal shock
function
Temperature
sensor terminal
Battery
To remove the electrical wiring base, turn it round and extract it from its housing.
–
+
ATTENTION: If the battery is not activated the battery alarm will be displayed.
CAUTION!
The controller is congured to automatically execute a daily rotation cycle to ensure efcient ball operation and cleaning. This occurs directly after the disinfection program, if
active, or after 24 hours have elapsed if disinfection is not active. Deactive this function
through the ANTI-CLOG setting by entering the release code 5566 and conrming with ON-
OFF. Eliminating this function increases the risk of deposits forming on moving parts of
valve. If it is necessary to eliminate the disinfection function as well, proceed as follows:
1. disable the ANTI-CLOG function; 2. eliminate the disinfection function.
9
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