Danfoss Electric Expansion Valves Type ETS 5M (Version 2)

Product Overview

The ETS 5M is a compact and lightweight stepper motor-driven electric expansion valve offering high reliability and precise control for refrigeration and air conditioning systems. It is available in a wide capacity range and is designed for use with various refrigerants.

Applications include VRF systems, close controls, heat pumps, mini chillers, bus/transport refrigeration, rooftops, cold rooms, and food service applications, supporting single and biflow operations.

The valve operates using a uni-polar/bi-polar motor, making it compatible with various electronic controllers from Danfoss and third-party vendors. When used with an EKE 100 series superheat controller and an AKS sensor, it can achieve superheat accuracy better than ± 0.5 K.

Features

• Optimized valve flow characteristic.
• Accurate valve control, even at low opening degrees.
• Bi-flow capability with full performance in both flow directions.
• High degree of freedom for installation orientation.
• Future-proof design for evolving refrigerant requirements.
• Compatible with existing valve drivers.
• Largest nominal capacity for R410A: 41.0 kW, 11.6 TR.

System Product

The ETS 5M functions are controlled by a Danfoss electronic controller or a compatible third-party controller. Danfoss recommends the EKE 100 series superheat controller or EKE 110 for injection control to achieve superheat accuracy better than 0.5 K. The controller requires precise temperature and pressure inputs from sensors and transmitters.

EKE 100 Superheat Controllers: These controllers are designed for DIN rail mounting and are available in three versions with different combinations of inputs, output relays, and functionalities.

Table 1: Sensors and other products for ETS 5M

• Pressure transmitter (DST P110): A digital ratiometric pressure transmitter. Other ratiometric pressure transmitters like AKS 32R can also be used depending on the controller type.
• EKF 1A/2A Stepper Valve Driver: An economical stepper valve driver that translates analog signals from the master controller into valve driving sequences.
• EKE 2U Backup power module: Provides sufficient power to the controller in case of power failures, ensuring the electronic valves close properly.

Applications

The ETS 5M is suitable for various applications, including:

• VRF (Variable Refrigerant Flow) systems
• Close controls
• Heat pumps
• Mini Chillers
• Bus and Transport refrigeration
• Rooftop units
• Cold rooms
• Food service applications

Note: ETS 5M 10-24 can be used in oil-free systems but with a limited MOPD of 27 bar.

Media Data

The ETS 5M is designed for use with various refrigerants and suitable lubricants. Refer to Table 2 for specific media data.

Table 2: ETS 5M Media Data

• Refrigerants: R410A, R32, R290, R22, R454C, R515B, R1234ze, R452B, R1234yf, R452A, R454B, R454A, R455A, R449A, R407C, R134a, R407H, R513A, R449B, R404A, R448A, R463A.
• Refrigerants oil: POE, PVE, PAG, MO.

Note on Flammable Refrigerants: For flammable refrigerants (e.g., R454C, R454A, R1234ze, R290, R32, R452B, R454B, R455A, R1234yf), the product is validated according to ATEX, EN 378, ISO 5149, ASHRAE 15, and IEC 60335-2-x standards. Ignition risk is evaluated according to ISO 5149 and IEC 60335. It is recommended to obtain third-party approval for systems containing flammable refrigerants, and to follow specific selection criteria.

The valve must be used in closed circuit refrigeration systems without oxygen, compliant with relevant standards.

Product Specification

Design

The ETS 5M electric expansion valve regulates refrigerant flow using a screw mechanism driven by a stepper motor. Electrical signals applied to the coil cause a magnet needle valve assembly to move linearly. The valve mechanism moves in steps based on the applied signals, allowing precise setting of the opening degree.

Pressure and Temperature Data

Table 3: Pressure and temperature data in SI and Imperial units

• Max working pressure (MWP): 49 barg (770 psig)
• Burst pressure: 5 x MWP
• Maximum operating pressure differential (MOPD): ETS 5M 10-24: A->B 35 barg / B->A 35 barg (508 Psig); ETS 5M 25-40: A->B 42 barg / B->A 42 barg (609 Psig)
• Ambient temperature: -40 to 80 °C (-40 to 176 °F)
• Ambient relative humidity: Max. 95% RH
• Fluid temperature range: -30 to 80 °C (-22 to 176 °F)

(1) A = Valve outlet, B = Valve inlet

Environmental Conditions

Table 4: Environmental conditions

• Max. Internal leakage @10 bar, A-> B and B->A: ETS 5M 10-24: < 150 cm³/min; ETS 5M 25-40: < 500 cm³/min
• Mechanical noise: < 60 dB(A)
• Enclosure rating (Valve and coil combined): IP 67
• Insulation class: B
• Insulation resistance: > 100 MΩ
• Storage temperature range: -30 to 70 °C (-22 to 158 °F)
• Relative humidity: Max. 95% RH

Flow Characteristics

Air flow characteristics for ETS 5M in normal and reverse flows are provided in graphical format (Figures 3 and 4). These characteristics are measured at 1 barg differential pressure, with air flow in m³/hour on the Y-axis and valve position (in half steps) on the X-axis.

Mechanical Configuration Options

The ETS 5M is an angleway valve available with steel bodies and ODM or ODF solder connections in stainless steel with copper plating. Inlet and outlet sizes are 1/4 in, 5/16 in, or 1/2 in. Connection configurations can be shaped in L, H, and U forms.

Figure 5: ETS SM Inlet and Outlet Configuration

Table 5: Connection Configuration (Shape L) shows available combinations of sizes and configurations.

Electrical Connection

The electrical connection is via a fixed cable, with lengths up to 4 meters, using JST XHP-5, JST XHP-6, or SUPU connectors. Refer to ETS 5M coil ordering details.

Electrical and Motor Specifications

The valve is operated by a uni-polar/bi-polar motor via a separate coil.

Table 7: Electrical and motor specifications

• Motor type: Uni/bi-polar coil
• Nominal voltage: 12 V+10%/-15%
• Coil resistance @ 20 °C: 50 Ohm ± 6%

Table 7 continued: Electrical and motor specifications

• Rated current: 0.24 A
• Power consumption: 4.1 W
• Holding current after each sequence of steps: Min. 30 ms, max. 1 s
• Permanent holding current: Not allowed
• Number of pulses: 1-2
• Recommended excitation method: 2-2
• Possible, but not recommended excitation method: 1-2
• Nominal pulse rate: 480 half-step pulses (max 31 pulses per second)
• Maximum duty cycle (30s): 50%
• Insulation resistance: > 100 MΩ
• Dielectric strength: < 5 mA

Stepper Motor Switch Sequence

Table 8: Unipolar Motor Excitation Sequence and Table 9: Bipolar Motor Excitation Sequence detail the coil wiring and excitation sequences for valve opening and closing.

Dimensions

Dimensional drawings for ETS 5M 10-24 (1/4 inch male, 5/16 inch male) and ETS 5M 25-40 (5/16 inch male, 1/2 inch male) are provided in Tables 10, 11, 12, and 13, along with Figure 6 for ETS 5M coil dimensions.

Ordering

The ETS 5M is highly configurable and can be delivered with various mechanical connections, including shape types L, H, and U.

Parts Program

The ETS 5M consists of a valve body and a separate Uni-polar/bi-polar motor coil, which are purchased separately. The valve body is hermetic and cannot be disassembled.

Table 15: ETS 5M Valve Body Ordering Data lists various ETS 5M valve body models with their specifications, including orifice size, connection type, rated capacity for R410A (in kW and TR), pack format, quantity per pack, and code number.

Table 16: Coils for ETS 5M provides details on available ETS 5M coils, including type, cable length (in meters and inches), electrical connector, pack format, quantity per pack, and code number. Options include Uni-polar JST XHP-5, Uni-polar JST XHP-6, and Bi-polar SUPU MC connectors, with various cable lengths and pack formats.

Note on Rated Capacity: The rated capacity is based on specific operating conditions: Refrigerant R410A, Evaporating temperature Te = 5 °C, Condensing temperature Tc = 38 °C, Refrigerant temperature ahead of valve Tliquid = 34 °C, Subcooling = 4k, Superheat = OK, Driving steps = 480 steps.

Valve Sizing

Danfoss recommends using the Coolselector®2 software for correct valve sizing. The software can be downloaded from the Danfoss website at http://coolselector.danfoss.com.

Product Identification

Valve Body Identification

Product data is available on the box label and product label. Information is laser engraved on the steel valve body in three fields.

Figure 8: Box label, ETS 5M valve body shows an example of the valve body label.

ETS 5M Coil Identification

Relevant product data for the coil is also available on its box label and product label.

Figure 9: Box label and Figure 10: Product label illustrate the labeling for the ETS 5M valve coil.

Certificates, Declarations and Approvals

The product list includes certificates, declarations, and approvals. Some approvals may change over time; check danfoss.com or contact a local Danfoss representative for the most current status.

Table 18: Certificates, Declarations and Approvals lists file names and document types for approvals.

Compliance: ETS 5M complies with:

• RoHS: Restriction of Hazardous Substances
• REACH: Registration, Evaluation, Authorisation and Restriction of Chemicals
• Pressure Equipment Directive
• CQC Approved

Online Support

Danfoss provides a wide range of support, including digital product information, software, mobile apps, and expert guidance.

• The Danfoss Product Store: Access product specifications, code numbers, technical documentation, certifications, and accessories at store.danfoss.com.
• Find technical documentation: Access data sheets, manuals, guides, 3D models, and more at www.danfoss.com/en/service-and-support/documentation.
• Danfoss Learning: A free online platform with courses for engineers, installers, and technicians. Create an account at www.danfoss.com/en/service-and-support/learning.
• Get local information and support: Find local Danfoss websites for regional news and expert connections at www.danfoss.com/en/choose-region.
• Spare Parts: Access the spare parts and service kit catalog via the smartphone app. Download at www.danfoss.com/en/service-and-support/downloads.

Danfoss A/S

Climate Solutions, danfoss.com, +45 74882222

Information provided is for guidance only and is binding only if explicitly referenced in a quotation or order confirmation. Danfoss reserves the right to alter products without prior notice.

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