ACCREDITED. Product range Code A2L Modulating temperature regulating unit for heating and cooling, with ALPHA2 L pump.

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1 Modulating temperature regulating unit for heating and cooling 7 series ACCREDITED ISO FM ا ٠١١٥٢/١٥ replaces /7 GB Function The temperature regulating unit is made to be used in radiant panel systems in combination with distribution manifolds. The modulating temperature regulating unit, comprehensive of digital temperature regulator, controls the temperature of the medium sent to the panels according to the actual thermal load. In this particular series, the temperature is regulated by a dedicated hydraulic unit equipped with a specific motorised three-way valve.it is supplied with removable differential by-pass kit for the primary circuit. This accessory is essential when there is a primary circuit circulation pump and the radiator circuits or fan coils are controlled by thermostatic or thermo-electric valves. In case of connection with a SEPCOLL or an hydraulic separator without primary pump, the kit can be removed and the hydraulic unit is connected directly. Reference Documentation - Tech. brochure Pre-assembled distribution manifolds for radiant panel systems 8...S series Product range Code 7.AL Modulating temperature regulating unit for heating and cooling, with ALPHA L - pump Technical specifications Materials Regulating unit with motorised three-way valve Body: brass EN 8 CB7S Headwork: brass EN CWN Obturator: stainless steel EN 88- (AISI ) Seals: EPDM Flow adapter unit Body: brass EN 8 CB7S Primary circuit by-pass kit Body: brass EN 8 CB7S By-pass valve: PPAG Spring: stainless steel EN 7- (AISI ) Shut-off valves Body: Ball: brass EN CW7N brass EN CWN, chrome plated Performance Medium: water, glycol solutions Max. percentage of glycol: % Adjustment temperature range: 7 78 C Primary inlet temperature range: C Max. working pressure: kpa ( bar) Min. working pressure: 8 kpa (,8 bar) Panel manifolds differential by-pass setting: kpa (. mm w.g.) Primary circuit differential by-pass setting: kpa ( mm w.g.) Temperature gauge scale: 8 C Pressure gauge scale: bar Connections: - primary circuit: / M (ISO 8-) - to regulating unit: F (ISO 8-) with nut - panel circuit outlets: / M - Ø 8 mm - outlet centre distance: mm Panel circuit differential by-pass graph Δp (mm w.g.) Δp (kpa),,, Flow rate (l/min) (m /h)

2 Trasformatore Convertitore AC V Hz A C V AC V D V E Hz ()A T con forme bar norm e C CL. ISPE S L 8 7 C 8 7 CAMERA CALEFF HOBBY BAGNO HOBBY BAGNO HOBBY BAGNO Digital regulator Three-point type Electric supply: V - / Hz Power consumption: VA Protection class: IP Actuator Three-point type Electric supply: V - / Hz Operating time: s (rotation ) Power consumption: 8 VA Auxiliary micro contact rating:,8 A Protection class: IP Max. ambient temperature: C Protective cover: self-extinguishing VO Head available at the regulating unit connections H (m w.g.) (kpa) Flow/return temperature probes NTC type Working range: - C Time constant:, s Response:. Ω at C Two-wire cable with /8 M connection Maximum temperature safety thermostat Factory setting: C ± C Protection class: IP Contact rating: A / V Minimum temperature safety thermostat Factory setting: C ± C Protection class: IP Contact rating: A / V Pump High-efficiency pump: model ALPHA L - Body: cast iron GG / Electric supply: V - / Hz Maximum ambient humidity: % Max. ambient temperature: C Protection class: IP Pump centre distance: mm Pump connections: / F (ISO 8-) with nut Note:,,,,8,,,,8, G (m /h) The pump can operate with constant or proportional pressure control which adapts the performance to the system requirements. For further details, see the pump installation instruction sheet supplied in the package. Insulation Material: closed cell expanded PE-X Thickness: mm Density: - inner part: kg/m - outer part: kg/m Thermal conductivity (DIN ): C:,8 W/(m K) C:, W/(m K) Coefficient of resistance to the diffusion of water vapour (DIN ): > Working temperature range: C Reaction to fire (DIN ): Class B Dimensions outlets 8 outlets outlets 8 7 / 7 A A A Code Panel outlets A 7CAL 7DAL 7EAL 7FAL 7GAL 7HAL 7IAL 7LAL 7MAL 7NAL

3 D V E A C V Hz ()A T bar norme CL. ISPESL 7 8 C 7 8 C CAMERA CAMERA 8 conforme Flow manifold equipped with flow meters and balancing valves. Trasformatore Convertitore AC V Hz AC V SYSTEM FLOW SYSTEM RETURN 7 Return manifold equipped with shut-off valves. End fittings with multi-position ball valves, automatic air vent, differential by-pass kit and fill/drain hose connection. BOILER FLOW BOILER RETURN Characteristic components Digital regulator for heating and cooling Three-way mixing valve Three-point actuator Hight-efficiency pump, ALPHA L - Flow temperature probe Return temperature probe 7 Adjustable drain cock 8 Tmin./Tmax. safety thermostats Flow and return temperature gauges with pocket Pressure gauge Primary circuit shut-off valves Primary circuit differential by-pass kit Max. RH% control probe Max. RH% control components Hydraulic diagram RT SF T C Digital regulator Transformer/Convertor Adjustable drain cock T C 8 7 ST Temperature gauge Temperature probe SR RT ST Humidity % probe Room thermostat Tmin./Tmax. safety thermostat Ball shut-off valve Motorised three-way valve Pressure gauge Pump BF BR Differential by-pass

4 Operating principle The medium temperature is regulated by a three-way mixing valve with a sector obturator comprehensive of an actuator managed by a specific digital controller. The controller receives the signal from two probes, flow probe on the mixing valve outlet and probe from the panel circuit return, and it controls the movement of the valve. The flow in the valve is regulated by a shaped obturator () that, by turning, closes or opens the hot water flow ports () and the water returning ports from the circuit () to adjust the desired flow temperature. Even if the secondary circuit thermal load or the inlet temperature from the boiler change, the mixing valve automatically adjusts the flow rates until it obtains the optimal flow temperature. PRIMARY INLET SECONDARY FLOW PRIMARY RETURN SECONDARY RETURN Construction details Regulating unit body The valve body, containing the thermal regulating device, is made out of a single casting with connections to the primary and secondary circuits. A specific internal channel carries the system return medium to the regulating valve, making it possible for the unit to be smaller in size and easy to connect. Flow unit The flow unit is made out of a single casting with the necessary ports to connect with the functional components such as the safety thermostat, temperature gauge, pressure gauge, drain valve and flow temperature probe. Reduced head losses The three-way mixing valve is equipped with a special obturator acting on calibrated water orifices. This ensures a high flow rate and a reduced size, while maintaining accurate temperature control, with no swinging due to sudden changes in thermal load. Electrical connections The actuator is electrically connected through an external plug-socket system with a protective rubber cap. This system does not require opening the lid to connect the cables. In this way, replacing the actuator (should this ever be necessary) is particularly easy to do. ϒC 7 8 Manual opening By removing the actuator, the valve can be opened-closed manually by using a screwdriver. Regulating way - primary inlet Fully closed Fully open open c l o s e open l o s e c

5 Differential by-pass kit for primary circuit Operation The differential by-pass kit for the primary circuit enables controlling the flow supplied to the heating elements connected before the outlet to the panel circuit regulating unit. Removable kit In case of an hydraulic circuit connected to a SEPCOLL or to an hydraulic separator without primary pump, the kit can be removed and the hydraulic unit is connected directly. The circuit shut-off valves, equipped with nut connection, can be removed easily and used directly on the unit. Connection without hydraulic separator or SEPCOLL Differential valve The differential valve is used to control the head in the primary distribution circuit. It aids the flow circulation towards the heating or cooling elements and limits overpressure if there are thermostatic or thermo-electric valves. The differential valve has a fixed setting that cannot be changed. It is preset to kpa, mean value for the loss of head in the primary circuit. Δp (mm w.g.) Δp (kpa) Direct connection to hydraulic separator or SEPCOLL,,, Flow rate (l/min) (m /h) Primary circuit by-pass kit The by-pass kit permits hydraulic separation between the primary and secondary circuits. This hydraulic separation optimizes the operation of the secondary circuit at the panels thus preventing the influence on the secondary circuit by any primary circuit flow rate variation. In this case, the flow rate through the respective circuits depends solely on the pump flow rate characteristics, preventing reciprocal influence due to their coupling in series. Two possible conditions of hydraulic balance are described here. The component is typically sized in order to have the following working rate: G primary = G secondary (inlet to the mixing valve) + G heating elements G primary maximum recommended:, m /h Secondary Gs Gp Primary Gprimary > Gsecondary Secondary Gs Gp Primary Gprimary < Gsecondary

6 Digital regulator 7 8 Operation The regulator receives the signal from the room thermostat to switch the pump on and to control the mixing valve. The regulator acts on the mixing valve following two operating logics, depending on the state of activation of the return sensor. Set point regulation: return probe off. Selector ) OFF. In this case the flow temperature FT is kept constant at the value set with the selector ) in both heating and cooling. This setting is shown on the display ). Modulating regulation: return probe on. Selector ) ON. In this case the flow temperature FT is changed according to the temperature measured by the return probe RT. In this way the actual thermal efficiency of the slab is kept under control and, as a result, the room s thermal load as well. This minimizes the system s thermal response times. RT set = FT set - % (FT set - C) FT calculated = FT set + (RT set - RT) Example: FT set = C RT set = -, ( - ) = C FT calculated = + ( - RT) The front panel identifies the following functions: ) Three-digit LCD indicating: the measured or calculated temperature and the settings of the delays programmed in the system. Temperature range displayed: C with resolution, C. ) Regulator ON/OFF function selector. ) Mixer on opening: LED on. ) Mixer on closing: LED on. ) Selector for setting the flow temperature. Temperature range 7 78 C Factory configuration: - heating: max C - cooling: min C ) Return probe selector. Probe off: OFF Probe on: ON Factory configuration: ON 7) Pump working (ON): LED on steady. 8) T.S. LED safety temperature. Continuously ON when the limit signalled by the safety thermostat or by the safety humidostat is reached. Continuously ON even if the flow/return sensors malfunction (see flow/return sensor paragraph). ) Heating/cooling function switch The new value of FT calculated is shown on the display ) with a side bar. At each update of the FT calculated, the FT measured is displayed for s, thereafter the new FT calculated is shown again. FT modification stops when RT reaches RT set. The return probe is not active in the cooling function. Curve correction graph with return probe FT;RT ( C) Designed flow temperature FT Set FT Calculated RT Set FT Calculated Return temperature designed Flow temperature limit FT Flow temperature ) Trimmer for maximum pulse duration on the valve. Adjustable, s. Factory configuration:, s. Pulse value calculation: % % % Designed thermal load % Tpulse (s) = Example: Tactuator rotation = s Tpulse = / = s Actuator rotation time (s) ) Return probe reading delay time trimmer. Adjustable s. Factory configuration: s. ) Valve-motor mechanical delay recovery trimmer. Adjustable s. Factory configuration: s. Display The three-digit LCD displays the following parameters: - flow temperature set with selector ). After s the measured flow temperature appears. - measured flow temperature, with return sensor off. - calculated flow temperature, with return sensor on. - maximum duration of pulse on the valve, selectable via trimmer ). Displayed for s. - return temperature acquisition delay time, selectable via trimmer ). Displayed for s. - valve-motor mechanical delay recovery, selectable via trimmer ). Displayed for s.

7 Back panel M V~ Hz ~ μ () A / V~ L N SA SR TA TS V~ IN OUT Apre Chiude Flow temperature limit for heating and cooling The regulator enables selecting the maximum flow temperature for heating and the minimum flow temperature for cooling. For this purpose, the regulator base contains specific dipswitches that enable setting different temperature limits. Factory configuration: - heating max C - cooling: min C. 7 8 Dipswitch position-temperature limit table On the back panel there are terminals for the electrical connections of the various components. Electric supply Electric supply V~ Live Electric supply V~ Neutral Ground/Earth Pump command Ground/Earth Pump command V~ Live Pump command V~ Neutral Mixer command 7 Valve command for opening 8 Common C Valve command for closing Auxiliary microswitch Auxiliary output N/O Auxiliary output common C Auxiliary output N/C Flow/return probe Flow temperature probe Common C Return temperature probe Ambient thermostat/safety thermostat Contact for ambient thermostat 7 Contact for common C ambient thermostat / Contact for common C safety thermostat and humidity probe convertor 8 Contact for safety thermostat and humidity probe convertor. Heating safety thermostat If the safety thermostat trips, on detecting a higher flow temperature than the setting, the following state comes into operation: pump OFF, mixing valve closed. The thermostat contact is N/C; if the connection fails, the regulator is not on. Auxiliary microswitch The regulator is equipped with an auxiliary microswitch that can be used to control other devices. Example: When Heating, to turn the water heater on/off. N/O contact - Pump stationary - ambient thermostat OFF or safety thermostat on (water heater off). N/C contact - Pump on - ambient thermostat ON (water heater on). When Cooling, to turn the refrigerating unit on/off. N/O contact - Pump stationary - ambient thermostat OFF or RH% limit probe on (refrigerating unit off). N/C contact - Pump on - ambient thermostat ON (refrigerating unit on). Contact capacity: A ( V). Flow/return probe The flow/return temperature probes are the NTC type. If the probes detect an ohmic resistance corresponding to short circuiting, the following operating state comes into operation: pump OFF, mixing valve closed, LED 8) on steady. Sensor resistance values table Setting Limit Limit Dipswitch maximum minimum ON Position Position Maximum temperature limit for cooling When cooling, the flow temperature can be selected no higher than C. Relative humidity control When using the cooling regulator, it is necessary to use the specific relative humidity probe. This probe has the task of measuring the limit of relative humidity so as to prevent condensation in the cooling slab. It is set for RH=8 8%. On reaching the setting, it triggers the following operating state: pump ON, mixer closed. Humidity probe control At the start of each cooling season, the operating state of the probe must be checked by placing a moist wad of cotton wool on its surface; this will cause the mixer to close and the red LED point 8 on the panel front to light up. Positioning the humidity probe Depending on the system characteristics, the humidity probe is located where there is the greatest risk of condensation. It is placed with the carbon portion upwards, as shown in the following diagrams. E Top side: carbon Bottom side: housed on the cooling surface Steps for correctly positioning the max RH% limit probe. The probe is secured to the manifold installed in the zone where you want to check that the relative humidity RH% cannot exceed the safety values. It is secured by means of the two clamps, using the specific holes. By controlling the following parameters it is possible to reach the maximum heating power delivered by the panel. - Minimum flow temperature, selectable via selector () on front panel. - Relative humidity RH% limit point, checked with relative humidity probe. - Ambient temperature, checked via ambient thermostat - Temperature and relative humidity of the ambient air, checked via fan coil or dehumidifier. Caution: The RH% limit probe is used to prevent any condensation from forming. In rooms where there is cooling, there must always be suitable air treatment. E

8 D V E c o nf o r me n o rmei SPES L Humidity probe connection V Room thermostat RT Trasformatore A C V Hz V L N ~ ~ Digital regulator code Convertitore AC V Hz AC V ()A T V~ L N SA SR TA TS V~ IN OUT Apre Chiude Safety thermostat ST Accessories 78 Digital room chrono-thermostat. operating programmes with ON/OFF spark advance. Weekly programmable clock. Fitted for phone programmer. Three temperature levels + anti-freeze. -minute minimum programme. ON/OFF function with adjustable differential from, to C or proportional. Adjustable temperature with, C steps. SUMMER/WINTER switch. changeover switch output contact: 8 () A. Protection class: IP. The humidity probe is connected to the regulator by installing the transformer and convertor in between. If you want to monitor various zones at risk of condensation, the humidity probe must be connected to a suitable interface kit (transformer, convertor and humidity probe). Up to convertors plus probes can be connected to a single transformer. Code x 8 x mm x 8 x mm x 8 x mm battery supply electric supply V built-in GSM module - supply V Application diagram Pump Lockshield Variable speed pump Shut-off valve Three-way valve Clock Thermostatic valve TH Thermostat/Humidostat E/I TH SPECIFICATION SUMMARIES Code 7.AL Modulating temperature regulating unit for heating and cooling. Connections to the primary circuit / M (ISO 8-). Connections to the regulating unit F (ISO 8-) with nut. Panel circuit outlet connections / M - Ø 8 mm. Medium: water and glycol solutions; maximum percentage of glycol %. Adjustment temperature range 7 78 C. Temperature range at primary circuit inlet C. Maximum working pressure kpa ( bar), minimum working pressure 8 kpa (,8 bar). Panel manifolds differential by-pass setting kpa. Primary circuit differential by-pass setting kpa. Temperature gauge scale 8 C. Pressure gauge scale bar. Complete with: flow manifold for panel system with outlets (from to ) with brass body, flow rate regulating valve with flow meter with a scale of l/min; return manifold for panel system with outlets (from to ) with brass body, shut-off valve. Regulating unit with motorised three-way valve, three-point actuator, electric supply V - / Hz, protection class IP. Digital regulator, electric supply V - / Hz, complete with probes measuring temperature of flow, return and relative humidity. Flow adapter unit with brass body. By-pass kit with brass body, PPAG differential by-pass valve and stainless steel spring. Shut-off valves with brass body and chrome plated brass ball. Maximum temperature safety thermostat: factory setting C ± C; minimum temperature safety thermostat: factory setting C ± C, protection class IP, contact rating A / V. High-efficiency ALPHA L - pump, protection class IP. Pre-formed PE-X shell insulation for primary circuit. Supplied preassembled in a painted plate box with lock, depth adjustable from to mm, including floor supports adjustable in height from 7 to mm. We reserve the right to make changes and improvements to the products and related data in this publication, at any time and without prior notice. Caleffi S.p.A. S.R. n. 8 Fontaneto d Agogna (NO) Italy Tel. + 8 Fax + 87 info@caleffi.com Copyright Caleffi