CALEFFI LEGIOMIX 6000 series Mode d’emploi

Electronic mixing valve with programmable thermal disinfection

Series 6000 (24 V)

Function

The electronic mixing valve is used in centralised

systems that produce and distribute domestic hot

water.

Its function is to guarantee and maintain 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.

This particular series of electronic mixing valves

is equipped with a specific regulator that

controls a set of programs for circuit thermal

disinfection against Legionella.

It also allows checking that the thermal

disinfection temperature and time are actually

reached and means the appropriate corrective

action can be taken. All the parameters are

updated every day and logged, with temperatures

recorded every hour.

Depending on the type of system and habits of

the user, it is possible to program temperature

levels and operation times in the most appropriate

manner.

It is fitted for remote control with specific MODBUS-

RTU transmission protocols, for use in Building

Management Systems (BMS).

CONTENTS

Warnings

Product range

Characteristic components

Package content

Technical specifications

Operating principle

Digital regulator

Operating status

Programs

Actuation relays

Operating parameters

Log

Hydraulic installation 18

Maintenance

Manual opening procedure

for flanged versions

Alarm management 21

INSTALLATION AND COMMISSIONING MANUAL

H0006862.01

www.caleffi.com

Characteristic components

ϒC

100

120

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adjustment

in progress

Product range

6000 Series Electronic mixing valve with programmable thermal disinfection. Threaded version.

sizes DN 20 (3/4”) - DN 25 (1”) - DN 32 (1 1/4”) - DN 40 (1 1/2”) - DN 50 (2”)

6000 Series Electronic mixing valve with programmable thermal disinfection. Flanged version. sizes DN 65 and DN 80

1) Legiomix digital regulator (24 V)

2) Mixing valve

3) Mixing valve actuator

4) Mixed water flow probe

5) Return probe (recirculation)

6) Mixed water flow temperature gauge

7) Actuator fixing clip

WARNINGS

The following instructions must be read and understood before installation, commissioning and maintenance of the

electronic mixing valve.

The safety symbol is used in this manual to draw attention to the safety instructions. The meaning of this

symbol is as follows:

CAUTION!

YOUR SAFETY IS INVOLVED. FAILURE IN FOLLOWING THESE INSTRUCTIONS MAY RESULT

IN INJURY.

- The electronic mixing valve must be installed by a qualified installation engineer in accordance with national and/or

local regulations.

- If the electronic mixing valves are not installed, commissioned and maintained properly in accordance with the

instructions contained in this manual, they may not operate correctly and may endanger the user.

- Make sure that all connection fittings are watertight.

- When making the hydraulic connections ensure that threads are not mechanically overstressed. Over time, this could

result in breakage, with water leaks causing damage and/or injury.

- Water temperatures higher than 50°C may cause serious scalding. When installing, commissioning and maintaining

electronic mixing valves, take the necessary precautions to ensure that high water temperatures do not place anyone

at risk.

CAUTION: Risk of electric shock. The back panel and mixing valve contain live circuits. Cut off

the electric supply before carrying out any work. Failure in following these instructions may

result in injury of persons or damage to property.

When switching on, you will need to select the desired language from the following options:

I - E - F - D - ES - P - NL - SL - HR - SR - RO

If the language is not selected within one minute, the menu will move on to the date and time

setting procedure. The language can always be changed via the “settings” menu.

Package content

• Digital regulator, consisting of housing and base for electrical connection

• DIN bar and wall anchors

• Mixing valve

• Actuator

• Flow probe

• Return contact probe. Return probe with pocket (optional) code F69381 (not supplied as standard)

• Cable seals

To ensure protection class IP 54, there are 9 holes in the bottom part of the housing for fitting the cable seals, as follows:

- Electric supply: PG9 supplied already mounted

- Mixing valve control: PG11 supplied already mounted

- Supply sensor PG7 supplied already mounted

- Return probe (system recirculation): PG7 supplied mounted

- 4 indicator relay contacts: PG9 supplied unmounted

- RS485 data interface: PG7 supplied unmounted

• Spare fuses

• Installation and commissioning manual

• Lever for manual opening (flanged versions only)

manual

opening

lever

(flanged

versions

only)

return

contact probe

(recirculation)

Technical specifications

Valve body

Materials:

Body: - threaded versions: brass EN 12165 CW617N

- flanged versions: “LOW LEAD” dezincification resistant alloy

EN 12165 CW724R

Ball: - 3/4”–1 1/4” versions: brass EN 12165 CW614N, chrome plated

1 1/2”–2” versions: brass EN 12165 CW614N, chrome plated, POM

- flanged versions: stainless steel AISI 316

Hydraulic seals: threaded versions: EPDM - flanged versions: NBR

Body nominal pressure: PN 16

Maximum working pressure: 10 bar

Maximum differential pressure: 5 bar

Maximum inlet temperature: 100°C

Temperature gauge scale: 0–80°C

Hot and cold water connections:

3/4”–2” M (ISO 10226-1) with union

Mixed water connection: 3/4”–2” F (ISO 10226-1) with union

Flanged connections: DN 65 and DN 80, PN 16 can be coupled with

counterflange EN 1092-1

Actuator for threaded version

Electric supply: 24 V (ac) - 50/60 Hz directly from the regulator

Power consumption: 6 VA

Protection cover: self-extinguishing V0

Protection class: IP 65

Ambient temperature range: -10–55°C

Electric supply cable length: 0,8 m

Actuator for flanged version

Electric supply: 24 V (ac) - 50/60 Hz directly from the regulator

Power consumption: 10,5 VA

Protection cover: self-extinguishing V0

Protection class: IP 65

Ambient temperature range: -10–55°C

Electric supply cable length: 2 m

Digital regulator

Material:

Housing: self-extinguishing ABS,

white RAL 1467

Cover: self-extinguishing SAN, smoked transparent

Electric supply: 24 V (ac) 50/60 Hz

Power consumption: 6,5 VA

Adjustment temperature range: 20–85°C

Disinfection temperature range: 40–85°C

Ambient temperature range: 0–50°C

Protection class: IP 54 (wall mounting)

(Class II appliance)

Contact rating:

Mixing valve control: 1A / 24 V

Alarm relay (R2): 5(2) A / 24 V

Relay 1, 3, 4: 10(2) A / 24 V

Fuses: 1 (main): 400 mA

Fuses: 2 (mixing valve): 1 A

Charge reserve: 15 days in the event of electric supply failure,

with a 3-cell rechargeable 150 mAh buffer battery

Enabled by microswitch.

Battery recharging time: 140 h

Conforms to Directives: CE

Temperature probes

Material:

Body: stainless steel

Type of sensitive element: NTC

Working temperature range: -10–125°C

Resistance: 10000 Ohm at 25°C

Time constant: 2,5

Max. distance for flow or recirculation probe: 150 m cable 2x1

250 m cable 2x1,5

Mixing valve performance

Accuracy: ± 2°C

Maximum differential pressure: 5 bar

Maximum ratio between inlet pressures

(H/C or C/H) with Gmin = 0,5 Kv: 2:1

Δp = 1,5 bar

RECOMMENDED flow rates to ensure stable operation and an

accuracy of ± 2°C

Size

Kv (m3/h)

DN 20

3/4”

8,4

DN 25

1”

10,6

DN 32

1 1/4”

21,2

DN 40

1 1/2”

32,5

DN 50

2”

41,0

DN 65

90,0

DN 80

105,0

Size

Min (m3/h)

Max (m3/h)*

DN 20

3/4”

0,5

10,3

DN 25

1”

0,7

13,2

DN 32

1 1/4”

1,0

28,1

DN 40

1 1/2”

1,5

39,0

DN 50

2”

2.0

48.3

DN 65

4,0

110,0

DN 80

5,0

150,0

Operating principle

At the inlets the mixing valve has the hot water from the storage and the cold water from the water mains. At the outlet there is the flow mixed water.

By means of a specific probe, the regulator measures the temperature of the mixed water at the valve outlet and actuates the mixing valve in order

to maintain the set temperature.

The appliance has a built-in digital clock, which can be used to set anti-legionella programs to disinfect the water system.

The system is disinfected by raising the water temperature to a specific value for a specific time duration.

For the best thermal disinfection control, in this type of system it may also be necessary to measure the temperature of the water returning from

the distribution network, using the recirculation probe. When this measurement is available, it is used to check and control the temperature

reached over all or part of the network, since the probe may be located at a significant remote point of the system.

The appliance is equipped with an RS-485 interface with MODBUS-RTU protocol for remote querying and setting and it carries alarm

signals and controls for other system devices outside via specific relays.

°C

LEGIOMIX®

Modbus/BACnet Converter

BACnet

Modbus

mixed water outlet probe

recirculation probe

BMS

A MODBUS-RTU / BACnet interface converter, code 755052, is available as an accessory for use in BMS which communicate with the BACnet

transmission protocol

Digital regulator

Electrical connections

Before connecting the power supply,

enable the battery by means of the specific

microswitch, so as not to activate the alarm

signal.

CAUTION: Risk of electric shock. The back panel and mixing valve contain live circuits. Cut off the

electric supply before carrying out any work. Failure in following these instructions may result in injury

of persons or damage to property.

CAUTION: Carrying out work with the electric supply connected may damage the electronics.

LEGIOMIX

L - N: 230 V~

6,5 VA

Fuse 1

(Main) T 80 mA 250 V~

Fuse 2

(Mix) T 1A 250 V~

RS485 18

17 16

MIXED PROBE

20 COM

RETURN PROBE

IP 54

T50

OPEN (Black)

COM (Blue)

CLOSE (BroWn)

RL 4

RL 3

RL 2

RL 1

230 V~

5(2) A

250 V~

5(2) A

250 V~

10(2) A

250 V~

10(2) A

250 V~

10(2) A

250 V~

5(2) A

250 V~

10(2) A

250 V~

Mixing valve

Supply

24 V

Relay 4 Flushing valves

Relay 3 Second thermostat

Relay 2 general alarm, probe failure, ...

Relay 1Activate the recirculation

pumpwhen in disinfection

program

Flow probe and return probe

with common earth wire

RS485 serial interface

Mixing valve

Supply

24 V

Relay 4 Flushing valves

Relay 3 Second thermostat

Relay 2 general alarm, probe failure, ...

Relay 1Activate the recirculation

pump when in

disinfection program

Flow probe and return probe

with common earth wire

RS485 serial interface

CALEFFI

To remove the electrical wiring base, turn it round and extract it from its housing.

–

Closes

Common

Opens

Earth*

Earth

Neutral

Live

Relay 4

Relay 3

Relay 2

Relay 1

Mixing

valve

Electric supply

24 V

Relay contacts

Flow

Common

Return

RS-485

Mixing valve fuse 1

A - 250 V delayed

Temperature

probes

Appliance fuse 400 mA -

250 V delayed

Battery disconnected

Battery connected

Shock disabled

(factory setting) Battery connection

Thermal shock

activation

Shock

enabled

Battery

Back panel

Connection of probes:

The cable connecting the mixing

valve and recirculation probes

and the regulator must be

installed in a dedicated raceway.

If the connection cable shares

the raceway with other power

cables, an earthed shielded

cable must be used.

If the polarity is reversed or if there is no power, the system will enter BATTERY ALARM STATUS; please

refer to the “Alarms” section.

°C

-20

-15

-10

-5

97060

72940

55319

42324

32654

25396

19903

15714

°C

12493

10000

8056

6530

5327

4370

3603

2986

°C

2488

2083

1752

1480

1255

1070

915

787

°C

100

105

110

115

120

125

680

592

517

450

390

340

Probe resistance table

* Earth connection

not used for the

threaded version

Description of internal buttons and terminals

On the connection base are two buttons, which can

be actuated by opening the front of the appliance: a

reset button and a button for disabling the keypad

(PIN).

Enabling functions-Jumper and microswitch

settings

Inside the appliance are a jumper and a microswitch:

The first is used to enable/disable the Thermal Shock

function.

The second is used to connect the internal battery

(this is done at the time of installation).

Important: If the battery is not activated

the battery alarm will be displayed.

disable

Reset

PIN code

disabling button

Appliance

reset button

Screw to close

the frontal

panel with hole

for lead-sealing

Temperature

probe terminal

RS-485

Interface

terminal

Microswitch for

enabling thermal

shock function

Closes

Common

Opens

Earth

Neutral

Live

Relay 4

Relay 3

Relay 2

Relay 1

Mixing

valve

Electric

supply 230 V

Relay contacts

Flow

Common

Return

RS-485

Mixing valve fuse 1

A - 250 V delayed

Temperature

probes

Appliance fuse

80 A - 250 V delayed

Battery disconnected

Battery connected

Shock disabled

(factory setting) Battery connection

Thermal shock

activation

Shock

enabled

Closes

Common

Opens

Earth

Neutral

Live

Relay 4

Relay 3

Relay 2

Relay 1

Mixing

valve

Electric supply

230 V

Relay contacts

Flow

Common

Return

RS-485

Mixing valve fuse 1

A - 250 V delayed

Temperature

probes

Appliance fuse

80 A - 250 V delayed

Battery disconnected

Battery connected

Shock disabled

(factory setting) Battery connection

Thermal shock

activation

Shock

enabled

–

Closes

Common

Opens

Earth*

Earth

Neutral

Live

Relay 4

Relay 3

Relay 2

Relay 1

Mixing

valve

Electric supply

24 V

Relay contacts

Flow

Common

Return

RS-485

Mixing valve fuse 1

A - 250 V delayed

Temperature

probes

Appliance fuse 400 mA -

250 V delayed

Battery disconnected

Battery connected

Shock disabled

(factory setting) Battery connection

Thermal shock

activation

Shock

enabled

Battery

Location of cable seals

When making the electrical connections, keep to the

following sequence for wiring the terminal strip and

tightening the cable seals:

1 Power supply*

2 Mixing valve control*

3 Flow probe*

4 Recirculation probe*

5 RS485

6 Relay 3

7 Relay 1

8 Relay 4

9 Relay 2

*Already assembled in factory

345

CAUTION!

The regulator is configured so that it executes a daily ball movement cycle, to ensure

efficient ball operation and cleaning. This procedure is carried out after the disinfection

program, if active, or in any case after 24 hours have elapsed if the disinfection is not active.

This function can be deactivated through the ANTI-CLOG item in the “SETTINGS” menu by

entering the release code 5566 and confirming with ON-OFF.

Eliminating this function increases the risk of deposits forming on moving parts of the valve. If it is necessary

to eliminate the disinfection function as well, it is advisable to proceed in the following order: first eliminate

the ANTI-CLOG function, then eliminate the disinfection function.

Front panel

1 LCD display*

2 LED display: Time

3 LED display: Tmixed-flow temperature**

4 LED indicator

- On

- Status OK

- Battery

- Alarm

5 LED display: Treturn-return temperature**

6 Mixing valve open/close LED

7 Thermal shock button

8 Navigation buttons

- Menu

- OK

- UP / DOWN

9 RS 485 front connection

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Dimensional characteristics to respect for circuit board wiring: connection cable cross-sections and lengths

Connections layout: connections must not create thrust stresses on the circuit board

Cable seal

No. Cable type

Unsheathing in mm

including stripping (L)

1 3x1 130

2 6x0,75 150

3 2x0,75 210

4 2x0,75 210

5 3x0,75 210

6 2x1,5 160

7 2x1,5 160

8 2x1,5 180

9 2x1,5 160

We recommend (if not used) cutting the wires

for the auxiliary microswitch and electrically

insulating them before the wiring process

(colours: white, green and red for the threaded

version, white and red for the flanged version).

* LCD display. Values displayed in °F or °C. See settings (Default: °C).

** LED display. Can be on or off.

Indication description

Indications on LED display

On the front of the appliance are 3 LED displays, which show the clock

time and temperature of the supply and return probes at all times. The

flow and return temperature displays can be on or off, depending on the

settings.

Hour and minutes display

(24 h system).

Probe temperature display (in °C)

Resolution 1°C

Probe high "out of range" warning display.

(blinking)

Probe low "out of range" warning display.

(blinking)

Probe "open" warning display.

(blinking)

Probe "short circuit" warning display.

(blinking)

If the recirculation sensor has been set as “not present” or faulty in

program 0, the related display remains Off.

LED indicators

The following LED indicators are located on the front of the appliance:

Mains power LED:

red led: steadily ON when mains voltage is present.

Mixing valve LED:

- red LED: on when opening hot water

- blue LED: on when opening cold water

Appliance OK status LED:

green LED: steadily ON when there are no faults or active

alarms.

Faulty battery LED:

red LED: steadily on when there is a battery fault; otherwise

it is Off.

Generic Alarm LED:

red LED: steadily ON when there is an alarm (probe fault,

thermal shock in progress, reset); Flashes when on low

power.

Indications on LCD display

On the front of the appliance is a green backlit alphanumeric display

with four rows of 20 characters each, for setting parameters, scheduling

operations, displaying error messages and machine status.

The buttons on the front panel (“MENU”, “UP”, “DOWN” and “OK”) can

be used to scroll through the menu items to configure the appliance, set

the various parameters and view the temperature log.

Startup or Reset display

Quick display screen, showing appliance data and product reference

code:

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DISINFECTION

in progress

FLUSHING in

progress

THERMAL SHOCK

in progress

END IN: 0005’

CANCEL DISIN-

FECTION?

CANCEL THERMAL

SHOCK?

Operating status

When the appliance is in operation, the LCD display indicates the device

status as shown in the following screens:

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