EX3: stepper motor valve with safety embedded solenoid ON/OFF valve

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1 pag. 1 / 11 EX3: stepper motor valve with safety embedded solenoid ON/OFF valve The EX3 electronic expansion valve provides precise refrigerant flow control and optimizes system superheat. EX3 is the ideal solution for supermarket cases and walk-in. The EX3 is a stepper motor and a solenoid safety valve designed to control the HCFC gas flow with embedded in one body the step valve and the safe positive shut-off valve. Combined with XM678D v. 2.6 or higher (multiplexed case controller) and XEV22D v.1.5 or higher (stepper EEV driver), it is the ideal solution for applications such as retail showcases and cold rooms with multiple parallel evaporators. It maximizes energy saving and guarantees quality food storage. The valve is able to shut-off the refrigerant line mechanically in case of power interruption, without the need of an external battery, any additional solenoid valve or electronic component.

2 1 MAIN APPLICATIONS pag. 2 / 11 The EX3 valve, combined with XM678D case controller and XEV22D driver, is used in such applications where you need to control the superheat on the evaporation with a fine tuning algorithm and the safety benefit of the integral solenoid positive shut-off. Display cases, cold rooms, walk-in, plug-in and every application with refrigerant evaporation with standard gases, can be controlled by the EX3 valve. v. 2.6 or HIGHER v. 1.5 or HIGHER

3 pag. 3 / 11 2 MAIN FEATURES EX3 is characterized by some important features that are described below. 2.1 PERFECT SH CONTROL AND FLEXIBLE POWER RANGE Thanks to the linear step valve reaction, from 80 up to 500 steps, EX3 is able to control the SH in the full range, in combination with the XEV22D driver and the XM678D case controller. You can select the most suitable valve among 8 different models related to the range. 2.2 SAFETY Positive shut-off function eliminates the necessity of a separate solenoid valve, or any external energy storage device such as UPS, battery or capacitor. Your system will work always in safety condition, without any liquid gas leakage in the evaporator outlet thanks to the mechanical shut-off. 2.3 MAXIMUM WATER PROTECTION The special IP67 connector with its exclusive design combined with the body valve and the step motor design (with his M12 connector), ensure a perfect IP67 protection even under the most severe working conditions. This feature is valuable in case of high pressure water during showcase cleaning, defrost dripping water and when the valve is covered by ice. Depending on the connector type, the valve protection can be IP65 or IP HIGH ENERGY SAVING Stable controls minimize energy consumption. The EX3 valve is driven by a stepper motor that offers 500 steps of control resolution. This feature reduces mass flow resulting in optimal energy efficiency also in comparison with mechanical or PWM valve performances. EX3 responds more rapidly to heat/thermo load changes, is more adaptable to ambient condition changes during the year, and enables a lower superheat setting with more efficient use of heat exchangers/evaporators. 2.5 CLEANABLE FILTER AND REMOVABLE PINS & ORIFICE In an easy and fast way it is possible to disconnect the top part of the valve motor from the body part, remove the filter and clean it. In the same way, you can remove and change the pin and the orifice without unsolder the pipes.

4 pag. 4 / LONG LIFE FOR HIGH RELIABILITY The gaskets, as well as every component, are designed and tested for over 1 million of operations. This warranties every working condition of the system for a time longer than all the other application components. 3 VALVE STRUCTURE The valve is basically composed of: Body valve with removable top part; Step motor actuator to drive the valve pin to the right position; Solenoid coil to close/open the safety valve. INTEGRATED SOLENOID FOR POSITIVE SHUT-OFF - NO BATTERY REQUIRED - FAILSAFE STEPPER-MOTOR DRIVEN PRECISE REFRIGERANT CONTROL - HIGH-ENERGY EFFICIENCY - EXTREMELY LONG LIFE FULL TAKE-APART BODY DESIGN - VERSATILITY - FLEXIBILITY

5 pag. 5 / 11 4 EX3 OVERVIEW EX3 is available in 8 different body valve models with different power (see table below). Code Pin type Paired orifice (mm) Capacity (R404A, kw) Capacity (R134a, kw) Capacity (R22, kw) Capacity (R407F, kw) Capacity (R507, kw) EX Pin EX Pin EX Pin EX Pin EX Pin EX Pin EX Pin EX Pin R407F Europe (Asercom) Capacity rating conditions: +38 C/+4 C and 11.17Bar differential pressure across the EX3. Please refer to the valve manual or to the selection tool to check the valve power at your working condition for each gas. 4.1 TECHNICAL FEATURES GENERAL Refrigerant temperature range Maximum operating pressure difference (MOPD) Maximum working pressure (MWP) Operating principle Vibration Weight Evaporating temperature -50 C +20 C Liquid temperature -30 C +75 C 24.8bar 34.4bar Uni-polar with 8 pulses (steps) sequencing 4g 770g (with solenoid coil and stepper motor) SOLENOID Insulation Class Operating voltage / Frequency / Consumption Power Connector type F 24Vac (+10%, -15%); 50/60Hz; 6.5W (12.7VA) Vac (+10%, -15%); 50/60Hz; 7.4W (14.4VA) Vac (+10%, -15%); 50/60Hz; 8.0W (16.1VA) 11Watts 3 Wires, DIN43650A (optional IP67 Connector)

6 pag. 6 / 11 STEPPER Operating voltage Operating current Stepper motor stator resistance Steps Frequency range Connector type Valve opening relation 12Vdc±10% 300mA per phase 40Ω±10% Starts to open at 80±40 pulses; fully open at 650 pulses 30 90Hz 5 wires M12 plug Linear from 10% to 100% of the nominal capacity 4.2 DIMENSIONS A 170mm (6.7 ) B 48mm (1.9 ) C 53mm (2.1 ) D 43mm (1.7 ) E 71mm (2.8 ) F 35mm (1.4 ) 1 Inlet (Braze) 3/8 ODF 2 Outlet (Braze) 1/2 ODF 3 Solenoid coil connector DIN 43650A 4 Stator connector M12 Plug (5 Pins) 4.3 WIRING DIAGRAMS STEP VALVE The EX3 unipolar valve has to be connected to a dedicated cable (see accessory section). Please, check below the terminal indications.

7 pag. 7 / SOLENOID VALVE CONNECTIONS The positive shut-off function eliminates the necessity of having a separate solenoid valve or any external energy storage device such as battery or super-cap boards. In order to use this particular function, there are two ways to connect the EX3 ON/OFF self save solenoid valve. - Direct connection to the main power supply (the same power supply of the transformer that supplies the driver) for the stand alone driver XEV22D or XM668D & XM678D models with software version earlier than Connection to the selected relay output selectable by parameter, on the XM668D & XM678D controllers from version 2.6 or higher, able to drive directly the EX3 ON/OFF positive shut-off solenoid valve. You need to set the relay output to enable this function. Please check the controller manual for details EX3 and XEV22D CONNECTIONS Here below how to connect the EX3 step valve to the XEV22D driver.

8 pag. 8 / EX3 and XM678D v. 2.6 CONNECTIONS Here below how to connect the EX3 step valve to the XM678D case controller. PLUG-IN APPLICATION EXAMPLE DISTRIBUITED APPLICATION EXAMPLE

9 pag. 9 / 11 5 COMPONENTS Components listed below are in multiple packages (12 pieces). EX3-C024 EX3-C120 EX3-C230 N.1 solenoid coil 24Vac, n.1 o-ring 10,5mm, n.1 o- ring 23,4mm, n.1 screw cap N.1 solenoid coil 110Vac, n.1 o-ring 10,5mm, n.1 o- ring 23,4mm, n.1 screw cap N.1 solenoid coil 230Vac, n.1 o-ring 10,5mm, n.1 o- ring 23,4mm, n.1 screw cap EX Body valve, size 2, with 1.5 mm orifice and pin 2 EX Body valve, size 3, with 1.5 mm orifice and pin 3 EX Body valve, size 4, with 1.5 mm orifice and pin 4 EX Body valve, size 5, with 1.5 mm orifice and pin 5 EX Body valve, size 6, with 2.6 mm orifice and pin 6 EX Body valve, size 7, with 2.6 mm orifice and pin 7 EX Body valve, size 8, with 2.6 mm orifice and pin 8 EX Body valve, size 9, with 2.6 mm orifice and pin 9 EX3-S012 N.1 12Vdc stator for step motor, n.1 o-ring 23,4mm EX3-M300 EX3-M600 Step connection cables available with 3 meters length Step connection cables available with 6 meters length EX3-PL67 Solenoid coil connector to assure an IP67 protection level

10 pag. 10 / 11 6 SPARE PARTS The components listed below are in multiple packages (12 pieces). EX3S-GST Seal assembly kit - n.1 screw cap, n.1 o-ring 10,5mm, n.2 o-ring 23,4mm EX3S-SEL N.5 nut o-ring 26,7mm EX3S-FR EX3S-PRT1 EX3S-PRT2 EX3S-PN2 EX3S-PN3 EX3S-PN4 EX3S-PN5 EX3S-PN6 EX3S-PN7 EX3S-PN8 EX3S-PN9 N.1 strainer, n.1 strainer cover, n.1 o-ring 26,7mm 1.5 mm orifice kit for valve with pins from size 2 to size 5 (n.1 orifice, n.1 o-ring 26,7mm) 2.6 mm orifice kit for valve with pins from size 6 to size 9 (n.1 orifice, n.1 o-ring 26,7mm)

11 pag. 11 / 11 7 HOW to ORDER EX3 A B C D 0 A B C D Solenoid coil Solenoid coil Pins Orifices Step Motor Cable voltage connector 2 24Vac 2 Pin 2 Small 1.5 mm 1 No 0 None 4 110Vac 3 Pin 3 Small 1.5 mm 3 3.0m 2 IP67 No Cable 5 230Vac 4 Pin 4 Small 1.5 mm 4 6.0m 5 Pin 5 Small 1.5 mm 6 Pin 6 Large 2.6 mm 7 Pin 7 Large 2.6 mm 8 Pin 8 Large 2.6 mm 9 Pin 9 Large 2.6 mm A D C B 8 PRICES Contact our sales department for prices. 9 AVAILABILITY and ORDERS All models will be available with a delivery time of 12 weeks.