Electrically operated expansion valves, type ETS REFRIGERATION AND AIR CONDITIONING. Technical leaflet

Transcription

1 Electrically operated expansion valves, type ETS REFRIGERATION AND AIR CONDITIONING Technical leaflet

2 Contents Page Introduction Features Technical data Electrical data Design Valve operation Sizing Ordering: Valve incl. actuator Valve incl. actuator and sight glass Technical data - SGH sight glass for HFC refrigerants Capacities: SI units ETS 50B ETS 100B ETS ETS US units ETS 50B ETS 100B ETS ETS Dimensions and weight: ETS 50 and ETS 250 and DKRCC.PD.VD1.A2.22 / 520H1463 Danfoss A/S, (USCO/MR),

3 Introduction Features ETS is a series of electrically operated expansion valves for precise liquid injection in evaporators in air conditioning and refrigeration applications. The valve piston and linear positioning design is fully balanced, providing for bi-flow operation as well as solenoid-tight shut-off in both flow directions. Precise positioning for optimal control of liquid injection. ETS 50 and 100 are designed for HFC/HCFC conditions including R410A, providing 45.5 bar (659.9 psig) working pressure. ETS 250 and 400 are designed for HFC/HCFC conditions, providing 34 bar (493 psig) working pressure. Balanced design providing bi-flow operation as well as solenoid tight shut-off function in both flow directions at MOPD 33 bar (48.6 psig). For operation and control of the ETS, a current or voltage driver (Danfoss type EKD 316) is required. The ETS design is being registered. The pending reference number is ETS 50 and 100 have bi-metal connections providing "waterless brazing", improved process and productivity. ETS 250 and 400 have built-in sight glass. A built-in sight glass is optional for ETS 50 and 100. Cable connectors on request. For manual operation and service of ETS valves an AST-g service driver is available. For further information please contact Danfoss (Commercial Refrigeration & Air Conditioning Controls). Technical data Parameter ETS 50B / ETS 100B Compatibility HFC, HCFC CE marking Yes MOPD 33 bar (48.6 psi) Max. working pressure (PS/MWP) 45.5 bar (659.9 psi) Refrigerant temperature range 40 C to 10 C ( 40 F to 50 F) Ambient temperature 40 C to 60 C ( 40 F to 140 F) Total stroke 13 mm / 16 mm (0.5 in. / 0.6 in.) Motor enclosure IP 6 Parameter ETS 250 / ETS 400 Compatibility HFC, HCFC CE marking Yes MOPD 33 bar (48.6 psi) Max. working pressure (PS/MWP) 34 bar (493 psi) Refrigerant temperature range 40 C to 10 C ( 40 F to 50 F) Ambient temperature 40 C to 60 C ( 40 F to 140 F) Total stroke 1.2 mm (0.68 in.) Motor enclosure IP 6 Danfoss A/S, (USCO/MR), DKRCC.PD.VD1.A2.22 / 520H1463 3

4 Electrical data Parameter ETS Stepper motor type Step mode Bi-polar - permanent magnet 2 phase full step Phase resistance 52Ω ±10% Phase inductance Holding current Step angle Nominal voltage 85 mh Depends on application. Full current allowed (100% duty cycle).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%, Max. total power Voltage / current drive: 5.5 / 1.3 W (UL: NEC class 2) Step rate 150 steps/sec. (constant voltage drive) steps/sec. 300 recommended (chopper current drive) Total steps ETS 50: 625 [+160 / -0] steps ETS 100: 3530 [+160 / -0] steps ETS 250 and 400: 3810 [+160 / -0] steps Full travel time ETS 50: 1 / 8.5 sec. (voltage / current) ETS 100: 3 / 11.5 sec. (voltage / current) ETS 250 and 400: 25.4 / 12. sec. (voltage / current) Lifting height ETS 50: 13 mm (0.5 in.) ETS 100: 16 mm (0.6 in.) ETS : 1.2 mm (0. in.) Reference position Electrical connection Overdriving against the full close position 4 wire 0.5 mm 2 (0.02 in 2 ), 2 m (6.5 ft) long cable Stepper motor switch sequence: CLOSING Coil I Coil II STEP Red Green White Black OPENING Design Valve / Actuator type ETS / AST-g 1. Cable 2. Glass seal 3. AST motor housing 4. Stepper motor 5. Bearing 6. Spindle. Insert 8. Valve piston 9. Valve seat 10. Valve port 4 DKRCC.PD.VD1.A2.22 / 520H1463 Danfoss A/S, (USCO/MR),

5 Valve operation ETS ETS valves are modulated by an electronically controlled 2-phase bipolar stepper motor (AST). The stepper stays in position unless power pulses from a driver initiate one of the two discrete sets of motor windings that operate respectively in the opening and closing directions. The direction of motor rotation depends on the phase relationship of the power pulses. The distance traveled depends on the number of pulses transmitted for a given move. The motor drives a lead screw, whose rotating motion is transformed into linear motion by a transmission in the cage assembly. The AST motor housing has a glass sealed 2 m (6.5 feet) cable connection as standard. Cable length and connections can be customized. The valve cone is an exponential V-port design that provides best part load efficiency with zero-resistance maximum capacity The cage and orifice design is fully power balanced, so that bi-flow operation has equal performance and capacity in either direction. The port design includes a shut-off function with solenoid tightness in both flow directions. Closed position is also the mechanical stop acting as reference point to reset the controller. The zero reference point is reset at each closing, with accuracy ensured by a slight overdrive. Note: Cable length between driver and actuator exceeding 10m (30 feet) can set off self-induction with reduction in the transmitted power and irregularity in the sequences as consequence. This may result in loss of steps now and again or more permanent inadequate power supply to the step motor. The driver circuit as well as the cable specifications are part of this interference. Please contact Danfoss for further information and possible countermeasures. Danfoss A/S, (USCO/MR), DKRCC.PD.VD1.A2.22 / 520H1463 5

6 Valve operation (Cont.) Q 0 [kw] ETS 50 Q 0 [kw] ETS 100 Capacity based on: R40C T e = 5 C (41 F) T c = 32 C (89.6 F) T l = 28 C (82.4 F) Sizing Q [kw] Opening [%] ETS Opening [%] Correction for subcooling t sub The evaporator capacity used must be corrected if subcooling deviates from 4K (.2 F). The corrected capacity can be obtained by dividing the evaporator capacity by the correction factor given below. Q [kw] Opening [%] ETS Opening [%] Note: Insufficient subcooling can produce flash gas. t sub Correction factor R404A / R Example: Refrigerant: R410A The corrected evaporator capacity thus becomes 500 : 1.15 = 435 kw (124 TR) Evaporating temperature: t e = +10 C (50 F) p e = 9.8 bar (142 psig) Condensing temperature: t c = 40 C (104 F) p c = 23 bar (330 psig) Pressure drop in valve: p = = 13.2 bar (192 psig) Subcooling: t sub = 15 K (2 F) Evaporator capacity: 500 kw (143 TR) Correction value from table: 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 As the ETS series has a wide capacity area from the table values down to 10% of these, the sizing is not critical. Under the given circumstances ETS 100B can operate between 496 kw (142 TR) and 56 kw (14 TR). Bi-flow capacities (opposite of normal flow direction) are the same for ETS 50B, whereas ETS 100B has 10% less from normal flow direction. 6 DKRCC.PD.VD1.A2.22 / 520H1463 Danfoss A/S, (USCO/MR),

7 Ordering Valve incl. actuator Industrial pack Type Rated capacity 1) Connection [in] Connection [mm] R410A R40C R22 R134a R404A ODF ODF Industial pack kw TR kw TR kw TR kw TR kw TR ETS 50B ETS 100B Code no. Industrial pack ODF ODF Industial pack Code no. Industrial pack / 8 / 8 9 pcs. 034G pcs. 034G1050 / / 8 9 pcs. 034G pcs. 034G1051 / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G / / 8 9 pcs. 034G pcs. 034G0055 Valve incl. actuator and sight glass Single pack Type Rated capacity 1) R410A R40C R22 R134a R404A ODF ODF kw TR kw TR kw TR kw TR kw TR [in.] Connection ODF ODF [mm] Code no. Single pack / 8 / G1008 ETS 50B 2 ) / / G / / G1006 ETS 100B / / G / / G / / G2000 ETS ETS / / G / / 8 034G / / 8 034G / / G ) 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. 2 ) ETS 25B is available upon request. Please contact Danfoss. Note: ETS 25B is half capacity of ETS 50B. Technical data - SGH sight glass for HFC refrigerants Green/ dry Moisture content ppm = parts per million 25 C 52 C Intermed. color Yellow/ wet Green/ dry Intermed. color R410A < > 165 < > 500 R40C < > 89 < > 146 R22 < > 80 < > 129 R134a < > 66 < > 95 R404A < > 45 < > 65 For further information please see the SG technical leaflet. Yellow/ wet Danfoss A/S, (USCO/MR), DKRCC.PD.VD1.A2.22 / 520H1463

8 Capacities Range 40 C to +10 C SI units Rated capacity [kw] t e [ C] ETS 50B Pressure drop p [bar] ETS 100B R410A R40C R22 R134a R404a 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 below. Selections can then be made from the tables above. t sub Note: Insufficient subcooling can produce flash gas. Correction factor 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 DKRCC.PD.VD1.A2.22 / 520H1463 Danfoss A/S, (USCO/MR),

9 Capacities Range 40 C to +10 C t e [ C] Rated capacity [kw] ETS 250 ETS 400 Pressure drop p [bar] SI units R40C R22 R134a R404a 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 below. Selections can then be made from the tables above. t sub Note: Insufficient subcooling can produce flash gas. Correction factor 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 Danfoss A/S, (USCO/MR), DKRCC.PD.VD1.A2.22 / 520H1463 9

10 Capacities Range 40 F to +50 F t e [ F] US units Rated capacity [TR] ETS 50B ETS 100B Pressure drop p [psig] R410A R40C R22 R134a R404a 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 below. Selections can then be made from the tables above. t sub Note: Insufficient subcooling can produce flash gas. Correction factor 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 DKRCC.PD.VD1.A2.22 / 520H1463 Danfoss A/S, (USCO/MR),

11 Capacities Range 40 F to +50 F t e [ F] Rated capacity [TR] ETS 250 ETS 400 Pressure drop p [psig] US units R40C R22 R134a R404a 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 below. Selections can then be made from the tables above. t sub Note: Insufficient subcooling can produce flash gas. Correction factor 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 Danfoss A/S, (USCO/MR), DKRCC.PD.VD1.A2.22 / 520H

12 Dimension and weight for ETS 50 and 100 Type ETS 50 ETS 100 Connections, ODF solder H 1 H 2 H 3 H 4 L 1 L 2 ød 1 Weight Input output Input output mm in. mm in. mm in. mm in. mm in. mm in. mm in. kg lb. / 8 / / / / / / / / / / / / / / / / / / / / / For further information please contact Danfoss Dimension and weight for ETS 250 and 400 Type ETS 250 ETS 400 Connections, ODF solder H 1 L 1 L 2 L 3 L 4 ød 1 B 1 Weight Input output Input output mm in mm in mm in mm in mm in mm in mm in kg lb 1 1 / / / / / / / / / / For further information please contact Danfoss 12 DKRCC.PD.VD1.A2.22 / 520H1463 Danfoss A/S, (USCO/MR),