Electric expansion valve Type ETS ETS 400

Transcription

1 MAKING MODERN LIVING POSSIBLE Data sheet Electric expansion valve Type ETS ETS 400 ETS is a series of electric expansion valves for precise liquid injection in evaporators for air conditioning and refrigeration applications. The valve piston and linear positioning design is fully balanced, providing bi-flow feature as well as solenoid tight shut-off function in both flow directions. The valve design uses bi-polar drive providing very precise flow regulation. ETS valves are compatible with electronic control solutions from Danfoss and other manufacturers. Features Precise positioning for optimal control of liquid injection. Wide range for all common refrigerants R410A, R40C, R404A, R50, R134a, R22, R1234ze (special valves for R44 (CO2) are available). ETS 12.5, ETS25, ETS 50 and ETS100 provides working pressure of 45.5 bar / 660 psig and ETS 250, ETS 400 provides 34 bar / 493 psig. Balanced design (ETS 50 ETS 400) providing bi-flow operation as well as solenoid tight shut-off function in both flow directions. ETS 50 and ETS 100 feature improved process and productivity due to waterless brazing i.e soldering without wet cloth for cooling. ETS 50 ETS 400 are all designed with built-in sight glass with moisture indicator. Internal and external corrosion resistant design. Low power consumption. Cable and connector assemblies as accessories. EKC 316A, EKC 312 and EKD316 are examples of Danfoss controllers with drivers matching the ETS needs. For manual operation and service of ETS valves an AST-g service driver is available. DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

2 Technical data Electrical data Compatibie refrigerants Refrigerant oil Comply with P.E.D. Max. opening pressure differential (MOPD) normal flow Max. opening pressure differential (MOPD) reverse flow Max. working pressure (PS/MWP) Refrigerant temperature range Ambient temperature Material of Construction R410A, R40C, R404A, R50, R134a, R22, R1234ze and other certain refrigerants (special valves for R44 (CO 2 ) are available) For other refrigerants, please contact your local Danfoss representative All mineral oils and ester oils Yes 33 bar (48.6 psi) ETS 12.5, ETS 25, ETS 50, ETS 100: 33 bar (48.6 psi) ETS 250, ETS 400: 10 bar (145 psi) ETS 12.5, ETS 25, ETS 50, ETS 100: 45.5 bar (660 psig) ETS 250, ETS 400: 34 bar (493 psig) -40 C 65 C (-40 F 149 F) -40 C 60 C (-40 F 140 F) ETS 50, ETS 100: Body and AST enclosure in brass, connections in bi-metal (stainless steel/copper) ETS 12.5, ETS 25, ETS 250, ETS 400: Body and AST enclosure in brass, connections in copper Motor enclosure Stepper motor type Step mode IP6 Bi-polar - permanent magnet 2 phase full step Phase resistance 52 Ω ±10% Phase inductance Step angle Nominal voltage 85 mh.5 (motor), 0.9 (lead screw), Gearing ration 8.5:1. (38/13) 2 :1 Constant voltage drive: 12 V dc -4% 15%, 150 steps/sec. Phase current Using chopper drive: 100 ma RMS -4% 15% Holding current Constant voltage drive: Depends on application. Chopper drive: full current allowed (100% duty cycle) Max. total power Voltage / current drive: 5.5 / 1.3 W (UL: NEC class 2) Step rate Total steps Full travel time Lifting height Reference position Electrical connection Constant voltage drive: 150 steps/sec. Chopper current drive: steps/sec. 300 recommended ETS 12.5, ETS 25, ETS 50: ETS 100: ETS 250, ETS 400: ETS 12.5, ETS 25, ETS 50: ETS 100: ETS 250, ETS 400: ETS 12.5, ETS 25, ETS 50: ETS 100: ETS 250, ETS 400: 2625 [160 / -0] steps 3530 [160 / -0] steps 3810 [160 / -0] steps 1 / 8.5 sec. (voltage / current) 23 / 11.5 sec. (voltage / current) 25.4 / 12. sec. (voltage / current) 13 mm (0.5 in.) 16 mm (0.6 in.) 1.2 mm (0. in.) Overdriving against the full close position M12 connector Compatible Danfoss controllers EKC 312, EKC 316A, EKD 316, EKD 316C and EXD 316 NOTE: Full life time of ETS can only be ensured if oil is present in the system. In oil-free systems, life time of the ETS cannot be guaranteed. 2 DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

3 Design Note: Flow direction from A to B refers to the normal flow. A A 1. M12 connection 2. Glass seal 3. AST motor housing 4. Stepper motor 5. Bearing 6. Spindle. Cone and lead nut 8. Valve seat ETS 12.5, ETS 25 - straight B ETS 12.5, ETS 25 - angleway B M12 connector 2. Glass seal 3. AST motor housing 4. Stepper motor 5. Bearing 6. Spindle. Top Nut 8. Valve piston 9. Valve seat 10. Valve cone ETS 50 & A 10 B 1. M12 connector 2. Glass seal 3. AST motor housing 4. Stepper motor 5. Bearing 6. Spindle. Top Nut 8. Valve piston 9. Sight glass with indicator 10. Valve seat 11. Valve cone ETS 250 & 400 A Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 3

4 Sight glass and indicator ETS 50, ETS 100, ETS 250 and ETS 400 are equipped with sight glass with moisture indicator. The physical position of the piston in the valve can be checked through the sight glass. It also helps to determine the flow direction of the refrigerant in the system (ETS 50 and ETS 100). Insufficient sub cooling can produce flash gas which is visible through the sight glass. The moisture indicator in the sight glass indicates dry or wet state of the refrigerant by changing its colour. Electrical wiring M12 connection Note: Electrical check of stepper motor and wiring: Coil I = 52 ohm, coil II = 52 ohm Stepper motor switch sequence CLOSING STEP Coil I Coil II Red Green White Black OPENING If the controller driving the ETS valve is from another manufacturer than Danfoss or a custom design, the following points must be considered in order to overcome potential step loss. a. To ensure total closing of the valve, the controller should have a function to overdrive the valve in the closing direction. It is recommended to overdrive ten percent of the full step range at appropriate intervals. b. The amount of lost steps may increase as a function of the amount of changes of the opening degree. Such designed controller should be able to compensate the lost steps after a defined number of changes in opening degree. Warning: At power failure the ETS valve will remain in the opening position it has at the moment of power failure, unless a safety device in the form of a battery backup is installed. 4 DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

5 Valve application Danfoss 93G18.14 Controller/Driver Temperature sensor Temperature sensor Pressure transmitter Evaporator ETS Valve operation The ETS valves operate modulating by electronically controlled activation of the AST stepper motor. The motor is a type 2-phase bi-polar, which stays in position, unless power pulses from a driver initiate the two discrete sets of motor stator windings for rotation in either directions. The direction of the rotation of the spindle depends on the phase relationship of the power pulses. This is decisive for the travel of the piston. The motor is operating the spindle, whose rotating movements are transformed into linear motion by the transmission in the cage assembly. The AST motor housing has a glass sealed M12 connection as standard, which can be connected with customized cable and plug/socket combinations. The piston design inside the ETS valve is pressure balanced, giving identical bi-flow performance capabilities and nearby identical maximum capacities. Closing the valve by overdriving, ensures that the reference number in steps is always correct. Operating the ETS series requires a controller with either 12 V DC voltage drive (5.5 W) or using chopper current drive (100 ma RMS). Danfoss EKC 316A, EKC 312 and EKD 316 are examples of qualified current controllers. Note: Depending on the type of controller or driver, there will be limitations in cable length between valve actuator and driver. Both the actual cable length, the level of EMC emission on the location and driver circuit has an impact on the actual distortion of the current to the actuator motor. For the Danfoss controllers the rule of thumb is maximum 5 m / 15 feet for EKC 316A and EKC 312 and 50 m / 150 feet for EKD 316. In order to increase max. cable length considerably, install a 10 mh filter type Danfoss AKA 211 on the four power terminals. Please contact Danfoss for further information how and when to apply this countermeasure in cases with questionable cable Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 5

6 Ordering ETS 12.5, ETS 25 Valve incl. actuator A B Type Rated capacity 1) Connection R410A R40C R22 R134a R404A ODF ODF (A B) Code no. [kw] [TR] [kw] [TR] [kw] [TR] [kw] [TR] [kw] [TR] [in.] [mm] ETS ETS Straight way Single Pack Angle way Single Pack ½ ½ 034G G G G / 8 5 / G G4214 / 8 / G G4215 ½ ½ 034G G G G / 8 5 / G G4206 / 8 / G G420 ETS 12.5 and ETS 25 do not feature sight glass ETS 50, ETS 100 Valve incl. actuator A B Type Rated capacity 1) Connection R410A R40C R22 R134a R404A ODF ODF (A B) Code no. [kw] [TR] [kw] [TR] [kw] [TR] [kw] [TR] [kw] [TR] [in.] [mm] Single pack ETS ETS / 8 / G108 / / G / / G / / G / / G / / G / / G / / 8 034G0505 ETS 50 and ETS 100 have integrated sight glass ETS 250, ETS 400 Valve incl. actuator A B Type Rated capacity 1) Connection R410A R40C R22 R134a R404A ODF ODF (A B) Code no. [kw] [TR] [kw] [TR] [kw] [TR] [kw] [TR] [kw] [TR] [in.] [mm] Single pack ETS ETS ) The Rated capacity is based on: Evaporating temperature t e : 5 C (40 F) Liquid temperature t l : 28 C (82 F) Condensing temperature t c : 32 C (90 F) Full stroke opening in normal flow direction 1 1 / / G / / G / / 8 034G G / / 8 034G / / G3501 ETS 250 and ETS 400 have integrated sight glass ETS for R44 Applications A Type ODF ODF (A B) [in.] Connection Code no. Single pack ETS 12.5 / 8 / 8 in 034G4220 ETS 25 / 8 / 8 in 034G4219 ETS /8 1 1/8 in 034G114 ETS /8 1 1/8 in 034G0515 ETS 50 and ETS 100 have integrated sight glass ETS for R44 can be used for expansion as well as gas bypass. ETS for R44 Applications (PS/MWP = 45.5 bar / 660 psig) For capacities, please contact Danfoss. B 6 DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

7 Accessories: M12 Female Connector Cable 1. Red 2. Green 3. White 4. Black Cable quality Jacket: PVC Jacket: CPE Temperature range -50 C 80 C (-58 F 16 F) -40 C 80 C (-40 F 16 F) Code no. Cable length [L] Design Single pack Industrial pack (20 pcs) 2 m 6.6 ft 034G G m 26.2 ft 034G G2323 M12 actuator connector 2 m 6.6 ft to 4 flying wires for driver 034G G m 9.8 ft connection 034G m 16.4 ft 034G2205 Cable Specification Jacket Colour UV resistant Insulation Connection Outer diameter M12 connector Special PVC cables Half Matt PVC Black Yes SR-PVC 4 wires (0.33 mm2 (22 AWG)) 5.0 mm 0.2 in. PU (polyurethane) UL VW-1 CPE cables CPE Gray Yes EPR 4 wires (0.5 mm2 (20 AWG)) 6.3 mm 0.25 in. PU (polyurethane) Resistant to gear oil, diesel oil, ethylene glycol, propylene glycol Note: CPE cables are recommended for outdoor Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85

8 Valve sizing For optimum performance, it is important to correct the evaporator capacity. Selection is also dependent on an acceptable pressure drop across the valve. The evaporator capacity must be corrected if sub cooling deviates from 4K /.2 F. In order to select the correct size of ETS you will need the following information: Refrigerant: R410A, R40C, R404A, R50, R134a, R22, R1234ze Evaporator capacity Q e in [kw] or [TR] Evaporating temperature t e in [ C] or [ F] Condensing temperature t c in [ C] or [ F] Max. acceptable pressure drop in the ETS valve in [bar] or [psi] Δp Sub cooling Δt sub Connection size Valve selection Example When selecting the valve it may be necessary to apply a correction factor to the actual evaporator capacity. This correction factor is required when system conditions are different from table conditions. Selection also depends on having an acceptable pressure drop across the valve. The following example illustrates correct selection of the valve. Refrigerant: R410A Evaporator capacity: Q e = 500 kw / 143 TR Condensing temperature: t c = 25 C / F Condensing pressure: p c = 23 bar / 330 psig Evaporating temperature: t e = +10 C / 50 F Evaporating pressure: p e = 9.8 bar / 142 psig Liquid Line Loss: p l = 0.5 bar (estimate) Max. Pressure drop in the valve: Δp = p c - p l - p e = = 12. bar / 184 psi Connection size: 11/8 11/8 in. Step 1 Determine the correction factor for sub cooling Δt sub. Correction factors for sub cooling Δt sub. From the correction factors table (see below) a sub cooling of 15K / 2 F, R410A corresponds to a factor of Step 2 Step 3 R410A Step 4 t e [ C] Connection factor Δt sub 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K.2 F 18 F 2 F 36 F 45 F 54 F 63 F 2 F 81 F 90 F R R410A R40C R134a R404A/R Corrected evaporator capacity is Q e (Corrected) = 500 kw/1.15 = 435 kw (124 TR) Now select the appropriate capacity table, R410A, and choose the column for an evaporating temperature of t e = 10 C / 50 F. Using the corrected evaporator capacity, select a valve that provides an equivalent or greater capacity at an acceptable pressure drop across the valve of 12. bar / 184 psi. ETS 100 delivers kw / 143 TR at 14 bar which is slightly higher than 12. bar / 184 psi pressure drop across the valve. Based on the required connection size of 1 1 / 8 in., the ETS 100 is the proper selection for this example. Rated capacity [kw] in the normal flow direction ETS 50 ETS 100 Pressure drop p [bar] ETS 100, 1 1 / 8 x 1 1 / 8 in. connection size: Single pack code no. 034G050. Note: For easy and precise selection of valve, use Danfoss CoolSelector software. You can download it from product+selection+tools+details/coolselector.htm 8 DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

9 Correction for subcooling t sub The evaporator capacities used must be corrected if subcooling deviates from 4 K /.2 F. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor. Selections can then be made from the tables below. t sub Correction factor Note: Insufficient subcooling can produce flash gas. 4 K 10 K 15 K 20 K 25 K 30 K 35 K 40 K 45 K 50 K.2 F 18 F 2 F 36 F 45 F 54 F 63 F 2 F 81 F 90 F R R410A R40C R134a R404A / R Rated Capacity [kw] t e [ C] Rated capacity [kw] in the normal flow direction ETS 12.5 ETS 25 Pressure drop p [bar] SI units R410A R40C R22 R134a R404A Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 9

10 Rated Capacity [kw] t e [ C] Rated capacity [kw] in the normal flow direction ETS 50 ETS 100 Pressure drop p [bar] SI units R410A R40C R22 R134a R404A The capacities stated in the tables are for the normal flow direction. For ETS 50 and 100 specifically, the capacity in reverse flow direction varies between 90% and 125% of the capacity in normal flow direction. 10 DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

11 Rated Capacity [kw] t e [ C] Rated capacity [kw] in the normal flow direction ETS 250 ETS 400 Pressure drop p [bar] SI units R40C R22 R134a R404A Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 11

12 Rated Capacity [TR] (TR = ton of refrigeration) t e [ F] Rated capacity [TR] in the normal flow direction ETS 12.5 ETS 25 Pressure drop p [psi] US units R410A R40C R22 R134a R404A DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

13 Rated Capacity [TR] (TR = ton of refrigeration) t e [ F] Rated capacity [TR] in the normal flow direction ETS 50 ETS 100 Pressure drop p [psi] US units R410A R40C R22 R134a R404A The capacities stated in the tables are for the normal flow direction. For ETS 50 and 100 specifically, the capacity in reverse flow direction varies between 90% and 125% of the capacity in normal flow Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 13

14 Rated Capacity [TR] (TR = ton of refrigeration) t e [ F] Rated capacity [TR] in the normal flow direction ETS 250 ETS 400 Pressure drop p [psi] US units R40C R22 R134a R404A DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

15 Capacity Normal flow direction ETS 12.5 ETS 25 ETS 50 ETS 100 ETS 250 ETS 400 Q0 [kw] Q0 [kw] Q0 [kw] Q0 [kw] Opening [%] Opening [%] Q0 [kw] Opening [%] Opening [%] Q0 [kw] Opening [%] Opening [%] Capacity based on: R40C T e = 5 C / 41 F T c = 32 C / 89.6 F T l = 28 C / 82.4 Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 15

16 Dimensions and weights for ETS 12.5 and ETS 25 Connections H 1 H 2 H 3 H 4 H 5 L 1 L 2 ød 1 Net weight Type ODF ODF (A B) [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [kg] [lb.] ETS 12.5 and 25 straight ETS 12.5 and 25 angle ½ ½ / 8 5 / / 8 / ½ ½ / 8 5 / / 8 / Dimensions and weights for ETS 50 and ETS 100 B Connections H 1 H 2 H 3 H 4 L 1 L 2 ød 1 Net weight Type ODF ODF (A B) [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [kg] [lb.] ETS 50 ETS 100 / 8 / / / / / / / / / / / / / / / DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),

17 Dimensions and weights for ETS 250 and ETS 400 Connections H 1 L 1 L 2 L 3 L 4 ød 1 B 1 Net weight Type ODF ODF (A B) [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [in.] [mm] [kg] [lb.] ETS 250 ETS / / / / / / / / / / For further information please contact Danfoss A/S (AC-MCI / sw), DKRCC.PD.VD1.C5.02 / 520H85 1

18 Spare parts ETS 12.5 and ETS 25 (short spindle) Description Quantity Code no. Actuator AST1 with integrated M12 (incl. gasket) 1 034G2086 ETS 25B, ETS 50, ETS 100, ETS 250 and ETS 400 (long spindle) Description Quantity Code no. Actuator AST1 with integrated M12 (incl. gasket) 1 034G2089 ETS 12.5 and ETS 25 (CO2 application) (short spindle) Description Quantity Code no. Actuator AST1 with integrated M12 (incl. gasket) 1 034G2088 ETS 25B, ETS 50 and ETS 100 (CO2 application) (long spindle) Description Quantity Code no. Actuator AST1 with integrated M12 (incl. gasket) 1 034G208 Gasket for all types Description Quantity Code no. Metal Gasket G2099 Related Danfoss Products AKS pressure transmitter and temperature sensor EKD 316 superheat controller (MODBUS) EKA 164A EXD 316 superheat controller (CANBUS) EKC 316A superheat controller 18 DKRCC.PD.VD1.C6.02 / Danfoss A/S (AC-MCI / sw),