CALEFFI 6000 Series, Legiomix 2.0 Installation And Commissioning Manual
Hybrid electronic mixing valve
H0002123
www.caleffi.com
© Copyright 2017 Caleffi
6000 Series LEGIOMIX 2.0
INSTALLATION AND COMMISSIONING MANUAL
CONTENTS
Product range
Characteristic components
Package content
Technical specifications
Operating principle
Application diagram
Regulator-actuator
Wiring diagrams
Electronic boards description
2
3
4
5
Operating principle
The electronic hybrid mixing valve combines the typical function
of the mechanical thermostatic mixing valve and the management
efciency of an electronic mixing valve in a single device.
The thermostatic mixing valve uses the mechanical action
performed by the internal control thermostatic element, which
responds promptly to any variation in temperature, pressure and
inlet ow rate to quickly restore the mixed water temperature value
at the outlet.
This standard mixing valve is effectively handled by a motorised
actuator that, upon the signal coming from the temperature probes
and under the control of a specic regulator, changes the mixed
water temperature set position.
The electronic regulator, directly on the actuator, allows the
mixed water temperature control according to different functional
programs, both for normal control and for the thermal disinfection
for the prevention of Legionella.
An optional memory system allows recording every minute of ow
temperature, return temperature, alarm and functional statuses,
useful for monitoring the operating status of the entire system.
Appropriate relays are used to manage the alarms and external
appliances, for example for loading accumulation hot water and
switching on/off the recirculation pump.
The regulator is tted for remote control with specic transmission
protocols such as MODBUS, through optional board, for use in
Building Management Systems (BMS).
The device is provided with CE mark in accordance with
directives 2014/35/EU and 2014/30/EU.
Cables pathway
Cables wiring and positioning
Probes connection
Recommended minimum distances
Front panel
Indication on LCD display
Operating status
Plumbing installation
Commissioning
Thermal disinfection
Maintenance
Functional faults
Seals
Troubleshooting
Regulator-actuator replacement/rotation
Thermostatic function
Application diagrams
6
7
8
9
10
11
12
1
Product range
6000 series Hybrid electronic mixing valve Sizes DN 15 (1/2”), DN 20 (3/4”), DN 25 (1”), DN 32 (1 1/4”), DN 40 (1 1/2”), DN 50 (2”)
Characteristic components
1 Digital regulator with actuator in single casing
2 Control knob and LCD display
3 Fitted for cable seals and cable glands, with holes
4 Valve body
5 Mixed water temperature probe
6 Mixed water temperature gauge
7 Return temperature probe and probe holder
Package content
• Thermostatic mixing valve complete with regulator-actuator
• Temperature gauge
• Flow probe
• Return contact probe
• Cable seals/cable glands
• Installation and commissioning manual
• Programming manual
• Button battery
At the back of the actuator-regulator, there are 2 holes for mounting
the cable seals and fitted for installing 2 cable glands to ensure IP
54 protection. The cable seals and cable glands have the following
dimensions:
- Cable seals: PG7
- Cable gland: diam. 20 mm
Technical specifications
Valve body
Materials:
Body: dezincification-resistant alloy
EN 1982 CC770S
Obturator: PPSG40
Hydraulic seals: EPDM
Spring: stainless steel EN 10270-3 (AISI 302)
Maximum working pressure (static): 10 bar
Maximum inlet temperature: 90°C
Temperature gauge scale: 0 – 120°C
Connections: 1/2” - 2” M (ISO 10226-2) with union
Regulator-actuator
Material:
Housing: PA6G30 anti-UV black
Covers: PA6G30 anti-UV black
Electric supply: 230 V (ac) 50/60 Hz
Power consumption: 6,5 VA
Adjustment temperature range: 35 – 65°C
Disinfection temperature range: 50 – 85°C
Ambient temperature range:
- Operation: 0-50°C EN 60721-3-3 Cl. 3K3 max. humidity 85%
- Transportation: -30-70°C EN 60721-3-2 Cl. 2K3 max. humidity 95%
- Storage: -20-70°C EN 60721-3-1 Cl. 1K3 max. humidity 95%
Protection class: IP 54
Contact rating:
- Relay OUT1, OUT2, OUT3: 5(2) A / 250 V
- Digital inputs: without potential
Fuses: self-resettable non-replaceable (only for control unit)
Battery: CR2032 225 mAh - life approximately 1 year
(for only keeping date and time in the absence of network)
Optional battery:
ER AA Lithium - Thionyl chloride 3.6 V lasting about 10 years
(for only keeping date and time in the absence of network)
Conforms to Directives: CE
Insulation class: Class II
Temperature probes
Body material: 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
Max. working pressure (dynamic): 5 bar
Max. inlet pressure ratio (H/C or C/H): 2:1
Size
Kv (m3/h)
1/2"
4,3
3/4"
4,3
1”
7,6
1 1/4”
10,0
1 1/2”
13,02”18,0
RECOMMENDED flow rates to ensure stable operation and an
accuracy of ± 2°C
Size
Min (m3/h)
Max (m3/h)*
*
Δp = 1,5 bar
1/2"
0,6
5,3
3/4"
0,6
5,3
1”
1,2
9,3
1 1/4”
1,5
12,5
1 1/2”
1,5
16,0
2”
2,0
22,1
2
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
an obturator in order to maintain the setting. Temperature fluctuations
caused by flow rate or pressure variations are compensated by the
thermostat in the valve. The appliance has a built-in digital clock,
which can be used to set anti-legionella programs to disinfect
the water system and to manage a recirculation pump. The
system is disinfected by raising the water temperature to a specific
value for a set 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 RS-485
interface (optional), with MODBUS protocol, for readouts and
remote setting. To use the device, it is necessary to configure the
MODBUS system with the addresses of the registers used by the
device (PC software is available).
Application diagram
COLD
HOT
MIXTURE
BMS
MODBUS
3
LEGIOMIX
2.0
Series 6000
T
AMB.
0÷50°C
L - N: 230 V
˜
6,5 VA
IP 54
CS 176
CS 180
CS 179 (OPZ)
L N
NO C NC NO C NO C
CS 176
μ
5(2) A 250 V
˜
230 V
˜
50 Hz
ALARM
OUT1OUT3OUT
2
RETURN
PROBE
MIXED
PROBE
T2
RS485
BA
IN 2 T1IN 1
CS 180
CS 179 (OPZ)
Cale S.p.A.
S.R. 229 n° 25
28010 Fontaneto d’Agogna
Italy
Regulator-actuator
Battery installation
Before connecting the power supply, insert the battery supplied, type CR 2032. The presence of the battery
allows the clock continuous updating. In case of low or missing battery, if there is no network, the device does not
ensure that the time and date are stored and therefore that the programmed disinfections are executed correctly.
Optional battery connector
code F0000692
NOTE: It is possible to replace the button battery with
an optional battery code F0000692, type ER AA
Lithium-Chloride of thionyl 3,6 V, to be connected
to the connector on the board.
The battery life is approx. 10 years.
For connecting the optional battery, its installation
and specifications, see the instruction sheet
H0003948.
Wiring diagrams
2
4
1
5
6
3
7
1 Actuator-regulator opening/closing pin
2 Power supply board (CS176)
3 Control board (CS180)
4 Multi-pole cable for board connection*
5 Motor connection cables*
6 RS-485 Interface board (CS179) (OPTIONAL)
7 RS-485 Interface connection cable (OPTIONAL)
* already assembled in factory
IMPORTANT:
Risk of electric shock. The CS176 board is live. 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. In case of power failure the system can activate an alarm
through OUT1 relay. Date and time are maintained by the battery. If the battery is low, the system displays the "BATTERY LOW"
alarm.
4
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