CALEFFI. Electronic mixing valve with programmable thermal disinfection series 01086/07 GB. replaces dp 01086/05

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1 Electronic mixing valve with programmable thermal disinfection 6 series cert. n 3 ISO 91 CLEFFI 186/7 GB replaces dp 186/5 Function The electronic mixing valve is used in central systems that produce and distribute hot water for sanitary purposes. It is designed to ensure and maintain the temperature of the hot tap water distributed in the network when there are variations in the temperature and pressure of the incoming hot and cold water or in the draw-off flow rate. This particular series of electronic mixing valves is equipped with a special regulator that controls a set of programs for circuit thermal disinfection against Legionella. In addition it enables checking the temperature and time for thermal disinfection are actually reached and undertaking the appropriate corrective action. ll the parameters are updated every day and logged, recording the temperatures by time. Depending on the type of system and habits of the consumer, it is possible to program the temperature levels and the operation times in the most appropriate manner. In addition, it is fitted for a monitoring and remote control connection. Patented Product range 6 series Electronic mixing valve with programmable thermal disinfection. Threaded version. sizes 3/ /4-1 1/ - 6 series Electronic mixing valve with programmable thermal disinfection. Flanged version. sizes DN 65 and DN 8 Technical specifications Valve body Materials: Body: brass EN 1165 CW617N Ball: brass EN 1165 CW617N, chrome plated Hydraulic seals: NBR Max working pressure (static): 1 bar Max inlet temperature: 1 Thermometer temperature scale: 8 Hot and cold water connections: 3/4 F Mixed water connection: 3/4 F with union Flanged connections: DN 65 and DN 8, PN 16 can be coupled with counterflanges EN 19-1 ctuator for threaded version Electric supply: 3 V (ac)- /6 Hz directly from the regulator Power consumption: 8 V Protective cover: self-extinguishing V Protection class: IP 44 mbient temperature range: Length of supply cable:,9 m ctuator for flanged version Electric supply: 3 V (ac)- /6 Hz directly from the regulator Power consumption: 1,5 V Protective cover: self-extinguishing V Protection class: IP 65 mbient temperature range: Length of supply cable: m Mixing valve performance ccuracy: ± Max working pressure (dynamic): 5 bar Max ratio between inlet pressures (C/H or H/C) with G =,5 Kv: :1 Digital regulator Material: - box: self-extinguishing BS white RL 17 - cover: self-extinguishing SN smoked transparent Electric supply: 3 V (ac) /6 Hz Power consumption: 6,5 V djustment temperature range: 65 Disinfection temperature range: 4 85 mbient temperature range: Protection class: IP 54 (wall mounting) (class II appliance). Contact capacity: - mixing valve control: 5() / V - alarm relay (R): 5() / V - relay 1, 3, 4: 1() / V Fuses: 1 Charge reserve: 15 days In case of a mains failure, with a 3-cell rechargeable buffer battery of 1 mh enabling via jumpe Battery charging time: 7 h Conforming to Directives: CE Temperature sensors: - type of sensitive element: NTC - working range: resistance: 1 Ohm at 5 - time constant:,5 s Max distance of the flow sensor: 5 m Max distance of the return sensor: 1 m

2 4 6 8 Dimensions Mixed Return Mixed Return tuesday 13//6 tuesday 13//6 E djustment running E adjustment running Menu Menu F C F D C D G Code 6 3/4" / / 69 B C D E B F G Weight (kg) 1,3 1,7,3,9 5, G Code 66 DN DN 8 B C 6 6 D E F B G Weight (kg) 8 3,4 Legionella-distribution temperature In central systems that produce hot water for sanitary purposes with storage, in order to prevent the growth of dangerous Legionella bacteria, the hot water must be stored at a temperature of at least 6. t this temperature it is certain that the growth of the bacteria that can lead to the illness called legionnaire s disease will be totally inhibited. These temperatures, however, are too high to be able to be used directly by the consumer; hot water at these levels can cause severe burns. It is therefore necessary to reduce the temperature of the hot water distributed in the network to a lower value compatible with use. In addition, not only the storage but also the entire distribution network needs thermal disinfection at regular intervals. Otherwise the bacteria would quickly form there too. In the light of all this, it is therefore advisable to install an electronic mixing valve that is able to: reduce the temperature of the distributed water to an adjustable value lower than that of storage keep the mixed water temperature constant as the temperature and pressure at the inlet or the draw-off flow rate of the mixed water vary allow programming thermal disinfection with a higher temperature than the adjustment value, in the necessary time and in periods with less frequent consumption (nighttime). Energy savings Energy savings rules advice to use mixing valves on water delivery systems for sanitary use with storage, to limit the temperature of the water at the inlet of the delivery network. The purpose of limiting the temperature is to reduce passive dispersion through the delivery network as much as possible, besides prevent delivering water at a higher temperature than necessary. Reference documents With regard to the prevention and control of Legionella, see the National Regulations and applicable Code of Practice. pplications The electronic mixing valve is typically used in central systems serving hospitals, nursing homes, sports centres, shopping malls, hotels, campsites and boarding schools. In these structures with their collective use, it is more than ever necessary to control and prevent legionnaire s disease in a programmed manner, managing the disinfection times in the best possible way. Thermal disinfection The drawing alongside shows the behaviour of Legionella Pneumophila bacteria as the conditions vary in the temperature of the water containing the bacteria, in laboratory cultures. To ensure correct thermal disinfection, it is necessary to go up to values of no less than 6. 7 Instant death of bacteria 6 Death of 9% of bacteria in minutes Death of 9% of bacteria in hours Optimum temperature for growth of bacteria Surviving bacteria inactive

3 Characteristic components 1 tuesday 13//6 adjustment running ) Legiomix digital regulator ) Mixing valve 3) Mixing valve actuator 4) Mixed water flow sensor 5) Return sensor 6) Mixed water flow thermometer Operating principle t the mixing valve inlet there is hot water from the storage and cold water from the mains. t its outlet there is the flow mixed water. By means of a specific sensor, the regulator measures the temperature of the mixed water at the valve outlet and operates the mixing valve to maintain the set temperature. It modifies the flows of hot and cold water at the inlet to bring the temperature of the outlet water to the set value. Even if there are drops in pressure due to hot or cold water usage or temperature variations at the inlet, the mixing valve automatically adjusts the flow rate of water until it obtains the set temperature. The appliance incorporates a digital clock and allows programming anti-legionella disinfection treatment on the plumbing 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 network, measured with the recirculation sensor. When this measurement is available, it is used in order to check and control the temperature reached over all or part of the network, since the sensor can be located at a significant remote point of the system. The appliance is equipped with an RS-485 serial port for remote querying and setting and via specific relays it carries alarm signals and controls for other system devices outside. HOT COLD recirculation sensor flow sensor MIX

4 Hydraulic characteristics Δp (bar) 1,5 3/ /4 1 1/ Δp (m w.g.) 15 Δp (bar) 1,5 DN 65 DN 8 Δp (m w.g.) 15 1, 1 1, 1,5 5,5 5,3 3,3 3,,,1 1,1 1,5,5,5, Flow rate (l/min) (m 3 /h) Flow rate (l/min) (m 3 /h) Recommended FLOW RTES to ensure stable operation and an accuracy of ± Recommended FLOW RTES to ensure stable operation and an accuracy of ± Kv (m 3 /h) 3/4 5, 1 9, 1 1/4 14,5 1 1/ 3, 3, Minimum Maximum* (m 3 /h) (m 3 /h) 3/4,5 6,4 1,7 11, 1 1/4 1, 17,8 1 1/ 1,5 8,, 39, Kv (m 3 /h) DN 65 9, DN 8 1, Minimum (m 3 /h) Maximum* (m 3 /h) DN 65 4, 11, DN 8 5, 1, * Δp = 1,5 bar * Δp = 1,5 bar Back panel To remove the electrical wiring base you need to turn it round and extract it from its housing. ppliance fuse 1 - V delayed Mix valve fuse 1 - V delayed Temperature sensors RS485 Flow Common Return Thermal shock enabling disabled Battery connection Closes Common Opens Earth Earth Neutral Live Relay 4 Relay 3 Relay Relay 1 Mix valve Electric supply 3 V Relay contacts Disabling button PIN code ppliance reset button Screw for closing front with hole for sealing Terminal for temperature sensors PIN disable Reset RS485 interface terminal Contacts for thermal shock function enabling jumper Battery connected Battery disconnected enabled Connecting sensors: The cable connecting the flow and return sensors with the regulator must be installed in a dedicated raceway. If the connecting cable is put into a raceway with other live cables then you must use a grounded shielded cable.

5 Front panel LCD display LED display: HH:MM 3 LED display: TMixed-flow temperature 4 Indicator LED tuesday 13//6 adjustment running Mixed Return - On - Status OK - Battery - larm 5 LED display: TReturn-return temperature 6 Mixing valve open-close LED 7 Thermal shock button Menu 8 Navigation buttons - Menu - OK - UP - DOWN 9 RS 485 front connection Indicator description Signals with LED display On the front of the appliance there are 3 LED displays that constantly give the current time and the temperatures of the flow and return (system recirculation) sensor. LED indicators On the front of the appliance there are the following indicator LEDs: Mains LED: red LED: on steady when there is mains voltage. Flow Return Return Mix valve LED: open - red LED: on when opening hot water close - blue LED: on when opening cold water Signals with LCD display On the front of the appliance there is a green backlit alphanumeric display with four rows of characters each, for setting parameters, programming work, displaying error messages and machine status. By scrolling through the menu items with the buttons on the front panel ( MENU, UP, DOWN and OK ), you can configure the appliance, set the various parameters and view the temperature log. ppliance OK status LED: green LED: on steady when there are no faults or alarms on. Faulty Battery LED: red LED: on steady when the battery is broken; otherwise off. Generic larm LED: red LED: on steady when there is an alarm (sensor trouble, shock in progress, reset). Blinks when on low power. tuesday 13//6 adjustment running tuesday 13//6 disinfection running

6 Work status Depending on the time, according to the programs entered, the appliance may be in one of the following work modes: djustment; Disinfection; Flushing; Thermal shock (this function takes priority over the preceding ones); In the event of trouble due to the appliance or the system, the device manages and reports the alarm and, depending on the situation, may maintain operation or not. So the statuses include: On with alarm Off with alarm The appliance is equipped with a chargeable battery that enables keeping the clock working in the event of a mains power failure. In the event of a blackout, in order to ensure the longest operating time possible for the battery, the appliance is in the status of: Off with Low Power. djustment In this mode the appliance continually checks the temperature detected by the flow sensor and as a result adjusts the mixing valve so that the flow temperature is equal to the set point. Disinfection In this mode the appliance runs a disinfection phase, which consists of taking the water temperature up to a pre-set value for a specific duration, suitably controlling the mixing valve. It is possible, with the menu, to set the days of the week when disinfection must be carried out. t the end of disinfection, the statistical data relating to the disinfection that has just been concluded are stored in memory. ccess to and exit from this mode take place automatically according to a time for starting (TIMEON) and ending (TIMEOFF) that the user can set. CHECK ON DISINFECTION Temperature t 1 t SET - PRG1 SET3 - PRG1B of tdis = Σ t i > tmin Time TIME ON TIME OFF If, in the time span (Time OFF - Time ON), the actual disinfection time is reached tdis greater than the set tmin, the disinfection is concluded with a positive outcome. It automatically exits this status and returns to adjustment. If it is not possible to reach a sufficient time tdis, the disinfection phase anyhow ends at Time OFF. Example: Time ON: : Time OFF: 3: tmin: 3 min Program: 1 Tdisinfection: 6 If, in the time span of 1 hour, there is a temperature higher than 6 for at least 3 minutes, disinfection has been successful and the regulator returns to adjustment. Otherwise, disinfection anyhow ends at 3:.

7 Programs The operation of the regulator, during disinfection, can be set according to different programs, chosen according to the type of system and its management: Program (default) This program features continual adjustment of the flow temperature with automatic disinfection in a time band that can be set. With this program the return sensor is not used; if present, it is only used as a monitor. During the phase of disinfection, the temperature of the flow sensor must be above SET for a time tdis at least equal to tmin, if this occurs then disinfection has been successful. s soon as there are the conditions to be able to consider disinfection successful, it is stopped. If disinfection is not successful there is no alarm signal. Program 1 This program features continual adjustment of the flow temperature with automatic disinfection in a time band that can be set. With this program the return sensor is not used; if present, it is only used as a monitor. During the phase of disinfection, the temperature of the flow sensor must be above SET for a time tdis at least equal to tmin, if this occurs then disinfection has been successful. s soon as there are the conditions to be able to consider disinfection successful, it is stopped. If it is not possible to reach the disinfection temperature or it is not possible to hold it for a sufficient time, the alarm for unsuccessful disinfection is generated. The alarm is recorded in the log. Program 1B This program can only be set if the return sensor is set as present. It is identical to the previous program, the only difference lies in the fact that the successful outcome of the disinfection phase is checked via the return sensor in relation to SET3 instead of via the flow sensor in relation to SET. s soon as there are the conditions to be able to consider disinfection successful, it is stopped. If it is not possible to reach the disinfection temperature or it is not possible to hold it for a sufficient time, the alarm for unsuccessful disinfection is generated. The alarm is recorded in the log. Program This program can only be set if the return sensor is set as present. It is identical to the previous program, the only difference lies in the fact that, if after a wait time (twit) since the start of disinfection the return temperature does not reach SET3, the flow temperature SET is increased by a value equal to (SET3 - TR reached), considering the fact that SET anyhow cannot exceed the limit of SETMX. This correction procedure (increasing only) of the disinfection SET is iterative: if necessary, it is repeated in the time span defined by TimeON and TimeOFF at each time interval equal to twit. s soon as there are the conditions to be able to consider disinfection successful, it is stopped. If it is not possible to reach the disinfection temperature or it is not possible to hold it for a sufficient time, the alarm for unsuccessful disinfection is generated. The alarm is recorded in the log. Thermal disinfection The temperatures and corresponding disinfection times for the network must be chosen according to the type of system and the related intended use. In the light of the requirements of the most advanced world legislation on this matter, the following criteria can generally be followed: T = 7 for 1 minutes T = 65 for 15 minutes T = 6 for 3 minutes Thermal disinfection is generally performed at times of reduced use of the system, for example at nighttime; this is to minimize the risk of users getting scalded. It is recommended to perform thermal disinfection every day and at least once a week. Thermal disinfection program guide table Type of check Progr. Use djustment temperature Disinfection temperature return sensor djustment and simple disinfection NO Flow: (SET 1) Flow: (SET ) no check 55 6 djustment and disinfection check 1 NO Flow: (SET 1) Flow: (SET ) on the flow temperature 55 6 djustment and disinfection check 1B YES Flow: (SET 1) Recirculation: (SET 3) on the return temperature to the heating plant Continual disinfection 1B YES -- Recirculation: (SET 3) 55-4 h djustment and check on disinfection with YES Flow: (SET 1) Recirculation: (SET 3) modification of the flow temperature with modification of flow according to the return temperature up to the max value

8 Flushing The appliance goes into this mode automatically at the end of the disinfection phase and it can be used for example to make the water temperature return to the adjustment value more quickly or to periodically clear the storage of any impurities. Thermal shock In this mode, the appliance regulates the flow temperature on the shock setting for a time that can be set. It is possible to start thermal shock on pressing the specific button on the front of the appliance (pressing it for at lease 5 ) while the work screen is displayed, or to program it with the menu item for deferred execution (countdown in minutes), or by remote control. fter activating the procedure, it is anyhow possible to stop it by pressing the shock button and confirming it with the OK button (display guided procedure), or by remote control. t the end of the Thermal phase the appliance goes back into the adjustment function. Low Power This mode is entered if there is a mains power failure. The appliance continues running the internal date clock, however in this state there is no power to switch over the relays so the regulator will perform neither adjustment nor disinfection. When the mains power comes back on, the blackout is recorded in the log and the regulator returns to operating as programmed, unless the mains failure lasted long enough to run down the battery completely. In this case the appliance will reset when the mains power comes back on. In the event of a reset or an extended power failure, the default settings are restored. Reset On the back of the panel there is the reset button, if it is necessary to restore the initial settings. If the date and time are not set after the reset, the regulator will only make the adjustment according to the default settings. Reset ctuation relays On the power and terminals board there are the contacts of the relays used to govern the auxiliary equipment and to report alarms. Relay 1: circulation pump (on in disinfection). Relay : general alarm (sensor fault, battery fault, blackout or loss of current time). This relay is connected via the NC contact. Relay 3: second thermostat. Relay 4: flushing valves. Relay contact for recirculation pump and hot water storage thermostat Here we give the electrical connection of relay 1 when there is the clock for managing the recirculation pump times. Here we give the electrical connection of relay 3 for connection to the second thermostat of the hot water storage. Relay 1 1 T1 6 T 7 Relay L N L N Recirculation pump Hot water storage primary pump

9 larm management In order to simplify the solution of any functional problems after installation and commissioning, the regulator is configured so as to signal any operating trouble with alarms and to undertake the appropriate action. In this case the cause of the alarm is shown on the LCD display. If the alarm does not inhibit all the functions, the alarm screen will alternate with the appliance status screen. larm description table larm indicator L1 L L3 L4 L5 L6 L7 Description Flow sensor faulty Return sensor faulty Disinfection failed Thermal in progress Mains power failure ppliance reset Battery faulty Depending on the type of alarm, certain actions are undertaken, relay statuses modified and information shown on the LED displays, the LCD display and the LEDs on the front panel. For the operating details please refer to the installation and commissioning manual. Log The log is a FIFO list (loop buffer) that is continually updated and records parameters relating to the phases of adjustment and disinfection that took place during the day. The last 4 days are saved, after which the data relating to the less recent day are overwritten and so on. Every hour the hourly averages of the flow and return temperatures are saved to Eeprom, while the alarms are saved at the time when they occur. t any time it is possible to view the average hourly values of the current day (obviously the ones already recorded). The data on disinfection are saved when disinfection ends. It is possible to view the log on the display (via the specific menu item) or remotely via the RS485 serial interface. The parameters saved in the log are: - Date (day, month, year) - Set program. This is saved when disinfection starts. - tdis: actual disinfection time (in steps of minutes). When the set program is or 1, this parameter is the time when the temperature of the flow sensor was greater than SET. When the set program is 1B or, this parameter is the time when the return sensor was greater than SET3. This is helpful when it is less than tmin, to understand how much greater the span of TIME ON: TIME OFF should be to complete disinfection. - TRMX: Maximum temperature of the return sensor during disinfection (if there was disinfection that ended on that day). - TRMIN: Minimum temperature of the return sensor during disinfection (if there was disinfection that ended on that day). It is calculated from the time when the return sensor measured a value greater than SET3, that is starting from the time when the disinfection starts being effective. - larms L1, L, L3, L4, L5, L6, L7 if they were activated on the day in question. - 4 hourly average values of the flow temperature. - 4 hourly average values of the return temperature. - Marker indicating whether the previous data are reliable. Used in the event of resetting, changing time, changing date and any other event that might have made the saved data unreliable. If no disinfection ended on that day, then the related fields will contain a default value. If there have been any faults with one or both sensors, the hourly average data will be displayed with dashes. If there are any gaps or unavailable data due to a change in date, time, etc., the cells will contain a default value and will be shown on the display with dashes. historic 6/4/6 tdis 6 PGRM 1 TR MX 58 TR MIN 48 LRM historic 6/4/6 h TF TR historic 6/4/6 h TF TR Ready for remote control The regulator can be controlled by computer, too, since it is fitted with an RS485 serial output connection, which is accessible both via terminals for fixed wiring and via the connector on the front. Since the interface is the multipoint bus type it is necessary for each appliance connected on the bus to be identified by an appropriate address in order to avoid conflicting identification. For a detailed description of the operations and controls that are possible from a remote location with this interface, please refer to the relevant documentation.

10 pplication diagrams Check valve Ball valve Temperature gauge Backflow preventer Pump T Expansion vessel Thermostat T T1 Safety valve Filter T T1 SPECIFICTION SUMMRIES 6 series threaded version Electronic mixing valve with programmable thermal disinfection. Consisting of: Valve body. Hot and cold water connections threaded 3/4 F (from 3/4 to ), mixed water connection 3/4 F (from 3/4 to ) with union. Brass body. Chrome plated brass ball. NBR hydraulic seals. Maximum working pressure (static) 1 bar. Maximum temperature at inlet 1. Thermometer temperature scale 8. ctuator. Electric supply 3 V (ac) - /6 Hz directly from the regulator. Power consumption 8 V. Protection class IP 44. mbient temperature range: Self-extinguishing protective cover VO. Power cable length,9 m. Mixing valve. ccuracy: ±. Maximum working pressure (dynamic) 5 bar. Maximum ratio between inlet pressures (H/C or C/H), with G =,5 Kv, :1. Digital regulator. Electric supply 3 V (ac) - /6 Hz. Power consumption 6,5 V. djustment temperature range 65. Disinfection temperature range mbient temperature range. With program for checking the temperature and time for thermal disinfection are actually reached; equipped with system for logging the measured parameters on a daily basis; fitted for a monitoring and remote control connection. Protection class IP 54 (wall mounting). Conforms to EC directives. 6 series flanged version Electronic mixing valve with programmable thermal disinfection. Consisting of: Valve body. Flanged connections DN 65 (DN 65 and DN 8), PN 16 can be coupled with counterflanges EN Brass body. Chrome plated brass ball. NBR hydraulic seals. Maximum working pressure (static) 1 bar. Maximum temperature at inlet 1. Thermometer temperature scale 8. ctuator. Electric supply 3 V (ac) - /6 Hz directly from the regulator. Power consumption 1,5 W. Protection class IP 65. mbient temperature range: Self-extinguishing protective cover VO. Power cable length m. Mixing valve. ccuracy: ±. Maximum working pressure (dynamic) 5 bar. Maximum ratio between inlet pressures (H/C or C/H), with G =,5 Kv, :1. Digital regulator. Electric supply 3 V (ac) - /6 Hz. Power consumption 6,5 V. djustment temperature range 65. Disinfection temperature range mbient temperature range. With program for checking the temperature and time for thermal disinfection are actually reached; equipped with system for logging the measured parameters on a daily basis; fitted for a monitoring and remote control connection. Protection class IP 54 (wall mounting). Conforms to EC directives.

11 Martedi 13//6 Martedi 13//6 Martedi 13//6 Mixed Return Menu Menu Mixed Return Menu Mixed Return Martedi 13//6 Martedi 13//6 Martedi 13//6 Mixed Return Menu Menu Mixed Return Menu Mixed Return Martedi 13//6 Martedi 13//6 Martedi 13//6 Mixed Return Menu Menu Mixed Return Mixed Return Menu CLEFFI ccessories 61 LEGIOMIX Interface LEGIOMIX Interface for local or remote transmission and management of the electronic mixing valve 6 series. Complete with: - RS3 interface-computer connection cable, - legiomix-interface connection cable with telephone connector, - transmission and management software. Power supply: 3 (V) - Hz - 5 V. Dimensions: 16 x 15 x 4 mm. Product range Code LEGIOMIX interface analog modem GSM digital modem bus cable (FROR 4/7 - x1 mm ) - 1 m roll The Legiomix electronic mixing valve can be remote controlled using the transmission interface and a specific transmission software. id 3 id 6 id 9 Legiomix Remote transmission with GSM modem The interface is connected to the Legiomix regulator via the front connector, for local control, or via the terminals on the back of the panel, for remote control. Up to 9 Legiomix regulators can be connected to the same interface, using a bus cable. The interface is then connected to the transmission modem, which can be both of analog and GSM digital type. id id 1 id 5 id 4 id 8 id 7 Legiomix interface Remote transmission with analog modem Local transmission The software supplied with the interface is used to manage the regulator, both during data acquisition and during modification of the operating parameters. In this way, it is possible to obtain information on the status of the appliance even at a distance, pick up temperature values and alarms recorded in the backup files, pilot thermal shocks, change the settings of various parameters. This type of control is particularly useful in the case of multiple installations with one or more appliances, which are all controlled by a single manager or maintenance technician. Typical examples of this are hotels, public buildings, schools, etc. Parametri Device Parameters dispositivo ID bus Programme Language Set adjustment Set disinfection Set return Set shock Set max temp. Time ON Time OFF Change done hh hh 1 Return sensor (Y/N) 1a Disinfection selection day English M T W T F S S mm 3 mm T wait T min T flux T shock T motor T play min min sec min min min Confirm Daily data log Date Prgm T dis TR TR larms ( ) max min T.average Hour flow ret T.average Hour flow ret Print Help Store

12 Safety in use s shown in the diagram opposite, temperatures of more than can cause burning very quickly. For example, at 55 partial burning will occur in approximately 3 seconds, while at 6 partial burning will occur in approximately 5 seconds. These times are, on average, halved for children and elderly people. Depending on the type of system and its intended use, together with the relevant risk assessment, various devices can be installed to safeguard users from scalding caused by hot tap water. Temperature - Exposure time Full thickness burns Partial thickness burns Safety conditions. Max. exposure time at a specific temperature, Seconds nti-scald device for domestic hot water use, code 614 Function The purpose of the device is to cut off the flow of water if its temperature reaches the set value. Designed for use in domestic hot water systems with electronic mixing valves with programmable thermal disinfection. Installed directly at the point of use outlet, it prevents the hot water from scalding the user during the thermal disinfection period (T>). Technical Specifications Hydraulic characteristics Dimensions Materials: - body: brass EN 1164 CW614N, chrome plated - springs: stainless steel Kv =,8 (m 3 /h) Max working pressure (static): Max working pressure (dynamic): Set temperature: Connections: 1 bar 5 bar 48±1 1/ F inlet 1/ M outlet pplication diagram B C Code B C 614 1/ 8 38 Operation Open Closed SPECIFICTION SUMMRIES Code 614 nti-scald device for domestic hot water use. 1/ F inlet x 1/ M outlet connections. Chrome plated brass body. Stainless steel springs. Maximum working pressure 1 bar. Set temperature 48 ±1. We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice. CLEFFI CLEFFI S.P.. I 81 FONTNETO D GOGN (NO) S.R. 9, N.5 TEL.INT R.. FX info@caleffi.it Copyright 7 Caleffi S.P..

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