MAKING MODERN LIVING POSSIBLE

Electrically operated
expansion valves type ETS
ETS is a series of electrically operated 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 ETS needs a current or voltage driver as partner to be operated.

EKC316 from Danfoss and EVD 200/300 from Carel are examples of qualified
partners.

REFRIGERATION AND
AIR CONDITIONING
Precision and reliability

Balanced design providing bi-flow

Cable connectors operation as well as solenoid tight shut-
on request. off function in both flow directions at
MOPD 33 bar (478.6 psig).

For manual operation and service of

ETS valves an AST-g service driver is
available.

ETS 250 and 400 are both designed

with a built-in sight glass.

Precise positioning for optimal A built-in sight glass is optional for

control of liquid injection. ETS 50 and 100.

ETS 50 and 100 have bi-metal

connections providing "waterless
brazing", improved process and
productivity. ETS 250 - 400 have pure
copper connections.

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 Technical data
(448 psig) working pressure.
Parameter ETS 50B / ETS 100B

Compatibility HFC, HCFC

CE marking Yes

MOPD 33 bar (448.6 psi)

Max. working pressure (PS/MWP) ETS 50 / 100 45.5 bar (659.9 psig)

Max. working pressure (PS/MWP) ETS 250 / 400 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 ETS 50 / 100 13 mm / 16 mm (0.5 in. / 0.6 in.)

Total stroke ETS 250 / 400 17.2 mm

Motor enclosure IP 67

EKC 316A controller

Advantages Functions

- The evaporator is charged optimally - even when - Regulation of superheat

there are great variations of load and suction pressure. - Temperature control
- MOP function
- Energy savings - the adaptive regulation of the - ON/OFF input for start/stop of regulation
refrigerant injection ensures optimum utilisation - Input signal that can displace the superheat
of the evaporator and hence a high suction pressure. reference or the temperature reference
- Alarm if the set alarm limits are exeeded
- The superheat is regulated to the lowest possible - relay output for solenoid valve
value at the same time as the media temperature - PID regulation
is controlled by the thermostat function.
Valve operation Electrical data

The ETS valves operate modulating by electronically Parameter ETS 50-400

controlled activation of the AST stepper motor. The motor Stepper motor type Bi-polar - permanent magnet
is a type 2-phase bipolar, which stays in position, unless
Step mode 2 phase full step
power pulses from a driver initiate the two discrete sets of
Phase resistance 52Ω ±10%
motor stator windings for rotation in either directions.
Phase inductance 85 mH
The direction depends on the phase relationship of the Holding current Depends on application.
power pulses, which number again is decisive for the travel. Full current allowed (100% duty cycle)
Step angle 7.5° (motor),
The motor is operating the spindle, which rotating 0.9° (lead screw),
Gearing ration 8.5:1. (38/13)2:1
movements are transformed into linear motion by the
transmission in the cage assembly. Nominal voltage (Constant voltage drive) 12 V dc - 4% +15%, 150 steps/sec.
Phase current (Using chopper drive) 100 mA RMS - 4% +15%,
The AST motor housing has a glass sealed 2 m (6.5 feet) Max. total power Voltage / current drive: 5.5 / 1.3 W (UL: NEC class 2)
cable connection as standard, which can be customized in Step rate 150 steps/sec. (constant voltage drive)
length and plug/socket combinations. 0-300 steps/sec. 300 recommended (chopper current drive)
Total steps ETS 50: 2625 [+160 / -0] steps
The valve cone is V-port respectively exponentiel, ETS 100: 3530 [+160 / -0] steps
combining the best performance qualities at part load ETS 250 and 400: 3810 [+160 / -0] steps
conditions as well as providing a 0-resistance maximum Full travel time ETS 50: 17 / 8.5 sec. (voltage / current)
capacity. ETS 100: 23 / 11.5 sec. (voltage / current)
ETS 250 and 400: 25.4 / 12.7 sec. (voltage / current)

The cage and orifice design is fully power balanced, giving Lifting height ETS 50: 13 mm (0.5 in.)
ETS 100: 16 mm (0.6 in.)
identical bi-flow performance capabilities and nearby ETS 250-400: 17.2 mm (0.7 in.)
identical maximum capacities.
Reference position Overdriving against the full close position

The port design includes a shut-off function with "solenoid" Electrical 4 wire 0.5 mm2 (0.02 in2), 2 m (6.5 ft) long cable
connection
tightness in both flow directions. Closed position is also
the mechanical stop acting as reference point to reset the
controller. By overdriving permanently while closed indures
Stepper motor switch
that the reference number in steps always is correct.
Coil I Coil II
Operating the ETS series requires a controller with either STEP
Red Green White Black
12 V dc voltage drive (5.5 W) or using chopper drive
1 + - + -
(100 mA RMS).
↑ CLOSING ↑ 2 + - - + ↓ OPENING ↓
3 - + - +
4 - + + -
1 + - + -
Valve operation

ETS 50 ETS 100

250 450
400
200 350
300
150

Q 0 [kW]
Q 0 [kW]

250
200
100
150
50 100
50
0 0
0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
Opening [%] Opening [%]

ETS 250 ETS 400

1400 2000
1200
1600
1000
1200
Q 0 [kW]
Q 0 [kW]

800

600 Capacity based on:

800
400 R407C
400 Te = 5°C (41°F)
200 Tc = 32°C (89.6°F)
0
Tl = 28°C (82.4°F)
0
0 10 20 30 40 50 60 70 80 90 100 0 10 20 30 40 50 60 70 80 90 100
Opening [%] Opening [%]

Capacities
Rated capacity1) ) The Rated capacity is based on:
1

Evaporating temperature te : 5°C (40°F)

Type R410A R407C R22 R134a R404A Liquid temperature tl : 28°C (82°F)
kW TR kW TR kW TR kW TR kW TR Condensing temperature tc : 32°C (90°F)
Full stroke opening.
ETS 50B ) 2 262.3 75.7 240.5 69.1 215 62 170 48.9 161.4 46.3
) ETS 25B is available upon request. Please contact Danfoss.
2
ETS 100B 488.4 140.9 447.8 128.7 400.4 115.4 316.5 91.2 300.5 86.6
Note: ETS 25B is half the capacity of ETS 50B.
ETS 250 - - 1212 349 1106 319 874 252 828 239

ETS 400 - - 1933 556 1764 509 1394 402 1320 381

Valve incl. actuator Valve incl. actuator and sight glass

Industrial pack Single pack
Connection Connection Connection
Type ODF × ODF Code no. ODF × ODF Code no. Type ODF × ODF ODF × ODF Code no.
in Industrial pack mm Industrial pack [in.] [mm] Single pack
7
/8 × 7/8 034G1000 22 × 22 034G1050 7
/8 × 7/8 22 × 22 034G1008
7
/8 × 11/8 034G1001 22 × 28 034G1051 ETS 50B ) 2
/8 × 1 /8
7 1
22 × 28 034G1005
ETS 50B 7/8 × 13/8 034G1002 22 × 35 034G1052 11/8 × 11/8 28 × 28 034G1006
11/8 × 11/8 034G1003 28 × 28 034G1053
11/8 × 11/8 28 × 28 034G0007
11/8 × 13/8 034G1004 28 × 35 034G1054 ETS 100B
13/8 × 13/8 35 × 35 034G0008
11/8 × 11/8 034G0000 28 × 28 034G0050
11/8 × 11/8 28 × 28 034G2000
11/8 × 13/8 034G0001 28 × 35 034G0051
ETS 250 13/8 × 13/8 35 × 35 034G2001
11/8 × 15/8 034G0002 28 × 42 034G0052
ETS 100B 15/8 × 15/8 034G2002
13/8 × 13/8 034G0003 35 × 35 034G0053
1 /8 × 1 /8
3 5
034G0004 35 × 42 034G0054 15/8 × 15/8 034G3000
ETS 400
1 /8 × 1 /8
5 5
034G0005 42 × 42 034G0055 2 /8 × 2 /8
1 1 54 × 54 034G3001

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DKRCC.PB.VD1.A1.02 / 520H0445 Produced by Danfoss RC-CMS, SW. 05.2005