ETS MANUAL

Refrigeration and Air Conditioning Controls
Technical leaflet
Electrically operated expansion valve,
Type ETS
REFRIGERATION AND AIR CONDITIONING
Technical leaflet
Electrically operated expansion valve, type ETS
Introduction
ETS is a series of electrically operated
expansion valves for precise liquid injection in
evaporators for air conditioning and
refrigeration applications.
The stepper motor drives the valve piston
directly by a leadscrew and nut.
The ETS needs a current driver as partner to
be operated.
EKC316 from Danfoss and EVD 200/300 from
Carel are examples of qualified partners.
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.
Features
Precise positioning for optimal control of
liquid injection.
Designed for R410A conditions, providing
45.5 bar (659.9 psig) working pressure.
Direct operated balanced design providing
bi-flow operation as well as solenoid tight
shut-off function in both flow directions at
MOPD 33 bar (478.6 psig).
Bi-metal connections providing "waterless
brazing", improved process and productivity.
Technical data
2
Parameter
ETS 50B / ETS 100B
Compatibility
HFC, HCFC
CE marking
Yes
MOPD
33 bar (448.6 psig)
Max. working pressure
45.5 bar (659.9 psig)
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.)
RD1TA102
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
Technical leaflet
Electrical data
Electrically operated expansion valve, type ETS
Parameter
ETS 50B / ETS 100B
Stepper motor type
Bi-polar - Permanent Magnet
Step Mode
2 phase full step
Phase Resistance
25.0 Ω
Phase Inductance
26 mH
Holding Current
0.5 Amps
Step Angle
7.5°
Nominal Voltage (Constant voltage drive)
12 Volt dc
Phase Current (Using chopper current control)
0.5 Amps
Max Phase Power
6 Watt
Step rate
30 Steps per sec.
Total steps
310 / 394
Full travel time
10 sec. / 13 sec.
Reference position
Overdriving against the full close position
Electrical connection
4 wire 0.5 mm2 (0.02 in2), 2 meter (6.5 ft) long cable
Stepper Motor Switch Sequence:
STEP
↑ CLOSING ↑
Design
Coil II
Green
White
Black
1
+
-
+
-
2
+
-
-
+
3
-
+
-
+
4
-
+
+
-
1
+
-
+
-
↓ OPENING ↓
Valve / Actuator type ETS / AST
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
Coil I
Red
Cable
Glass seal
AST motor housing
Stepper motor
Bearing
Spindle
Insert
Valve piston
Valve seat
Valve port
RD1TA102
3
Technical leaflet
Electrically operated expansion valve, type ETS
Valve operation
ETS
The ETS 50B and ETS 100B operate
modulating by electronically controlled
activation of the AST stepper motor.
The motor is a type 2-phase bipolar, 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 depends on the phase relationship of the power pulses, which number again
is decisive for the travel.
The motor is directly operating the spindle,
which rotating movements are transformed
into linear motion by the transmission in the
cage assembly.
The AST motor housing has a glass sealed
2 m (6.5 feet) cable connection as standard,
which can be customized in length and plug/
socket combinations.
The valve cone is V-port type "Dutch Tulip",
combining the best performance qualities at
part load conditions as well as providing a 0resistance maximum capacity.
The cage and orifice design is fully power balanced, giving identical bi-flow performance
capabilities and nearby identical maximum
capacities.
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. By overdriving permanently while
closed indures that the reference number in
steps always is correct.
Operating the ETS series requires a controller
with current driver, providing 0.5 amp phase
and holding current.
Danfoss EKC316A and Carel EVD200/300 are
examples of qualified controllers.
Capacity based on R 407C –5°C, 32°C, 28°C (23°F, 89.6°F, 82.4°F)
4
RD1TA102
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
Technical leaflet
Electrically operated expansion valve, type ETS
Sizing
Correction for subcooling ∆tsub
The evaporator capacity used must be
corrected if subcooling deviates from 4K
(7.2°F). The corrected capacity can be
obtained by dividing the evaporator capacity
by the correction facto given below.
Note:
Insufficient subcooling can produce flash gas.
∆tsub
Correction factor
4K
10 K
15 K
20 K
25 K
30 K
35 K
40 K
45 K
50 K
7.2°F
18°F
27°F
36°F
45°F
54°F
63°F
72°F
81°F
90°F
R 22
1.00
1.06
1.11
1.15
1.20
1.25
1.30
1.35
1.39
1.44
R 410A
1.00
1.08
1.15
1.21
1.27
1.33
1.39
1.45
1.50
1.56
R 407C
1.00
1.08
1.14
1.21
1.27
1.33
1.39
1.45
1.51
1.57
R 134a
1.00
1.08
1.13
1.19
1.25
1.31
1.37
1.42
1.48
1.54
R 404A / R 507
1.00
1.10
1.20
1.29
1.37
1.46
1.54
1.63
1.70
1.78
Example:
Refrigerant:
R 410A
The corrected evaporator capacity thus becomes 600 : 1.15 = 522 kW (149 TR)
Evaporating temperature:
te = +10°C (50°F)
pe = 9.8 bar (142 psig)
As the ETS series has a wide capacity area
from the table values down to 10% of these,
the sizing is not critical.
Condensing temperature:
tc = 40°C (104°F)
pc = 23 bar (330 psig)
Under the given circumstances ETS 100B can
operate between 564 kW (161 TR) and 5 kW
(1.5 TR).
Pressure drop in valve:
∆p = 23 – 9.8 = 13.2 bar (192 psig)
Bi-flow capacities (opposite of normal flow
direction) are the same for ETS 50B, whereas
ETS 100B has 10% less from normal flow
direction.
Subcooling:
∆tsub = 15 K (27°F)
Evaporator capacity:
600 kW (171.4 TR)
Correction value from table:
1.15
Ordering
ETS 50B and ETS 100B are supplied individually in industrial pack:
ETS 50B
9 pcs
ETS 100B 9 pcs.
Valve incl. actuator
Rated capacity 1)
Type
R 410A
kW
TR
R 407C
kW
R 22
TR
kW
Connection [in]
R 134a
TR
kW
TR
R 404A
kW
ODF × ODF
ETS 100B
555
125
160
396
509
114
146
250
455
102
131
280
360
81
104
266
342
77
98.5
Code no.
Industrial
pack
7
/8 × 7/8
034G1000
22 × 22
034G1050
/8 × 11/8
034G1001
22 × 28
034G1051
/8 × 13/8
034G1002
22 × 35
034G1052
11/8 × 11/8
034G1003
28 × 28
034G1053
11/8 × 13/8
034G1004
28 × 35
034G1054
11/8 × 15/8
034G1005
28 × 42
034G1055
11/8 × 11/8
034G0000
28 × 28
034G0050
11/8 × 13/8
034G0001
28 × 35
034G0051
11/8 × 15/8
034G0002
28 × 42
034G0052
13/8 × 13/8
034G0003
35 × 35
034G0053
13/8 × 15/8
034G0004
35 × 42
034G0054
15/8 × 15/8
034G0005
42 × 42
034G0055
7
430
Connection [mm]
ODF × ODF
Industrial
pack
TR
7
ETS 50B
Code no.
) The Rated capacity is based on:
Evaporating temperature te :
5°C (40°F)
Liquid temperature tl :
28°C (82°F)
Condensing temperature tc :
32°C (90°F)
Full stroke opening.
1
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
RD1TA102
5
Technical leaflet
Electrically operated expansion valve, type ETS
Capacity
SI units
Range –40°C to +10°C
Rated capacity [kW]
ETS 50B
te
[°C]
2
R 410A
R 407C
R 22
R 134a
R 404a
ETS 100B
Pressure drop ∆p [bar]
2
4
6
8
10
12
14
16
–40
286.2
369.9
4
420.2
6
453.7
8
476.9
10
492.9
12
503.5
14
510.0
16
367.6
475.2
539.7
582.8
612.6
633.2
646.8
655.1
–30
278.8
363.8
415.5
450.5
474.9
492.0
503.6
510.9
358.1
467.3
533.8
578.6
610.0
631.9
646.8
656.2
–20
268.9
354.0
406.6
442.5
467.9
485.9
498.3
506.4
345.5
454.7
522.3
568.5
601.1
624.1
640.1
650.5
–10
256.8
340.6
393.3
429.7
455.7
474.3
487.3
495.9
329.9
437.5
505.2
552.0
585.3
609.2
625.9
637.0
–5
250.0
332.7
385.0
421.4
447.5
466.2
479.4
488.2
321.1
427.3
494.6
541.3
574.8
598.9
615.8
627.1
10
226.5
303.9
353.8
388.9
414.3
432.7
445.7
454.4
291.0
390.4
454.5
499.6
532.2
555.8
572.5
583.6
–40
261.0
328.4
365.6
388.1
401.5
408.7
411.3
410.3
335.3
421.8
469.7
498.5
515.8
525.0
528.4
527.0
–30
259.6
330.0
369.7
394.1
409.3
418.0
421.9
422.0
333.5
423.9
474.8
506.3
525.7
536.9
541.9
542.1
–20
255.9
328.6
370.5
396.9
413.8
423.9
429.1
430.5
328.7
422.1
476.0
509.9
531.5
544.5
551.2
552.9
–10
249.9
324.2
367.9
396.0
414.4
425.9
432.3
434.8
321.0
416.4
472.6
508.7
532.3
547.1
555.4
558.5
–5
246.1
320.8
365.2
394.0
413.1
425.2
432.2
435.2
316.1
412.1
469.1
506.1
530.6
546.2
555.2
559.0
10
231.7
305.8
351.2
381.5
402.0
415.6
423.9
428.1
297.6
392.9
451.1
490.0
516.4
533.8
544.6
549.9
–40
249.5
318.7
359.3
385.9
403.7
415.4
422.7
426.3
320.5
409.3
461.6
495.7
518.5
533.6
542.9
547.7
–30
246.9
318.2
360.6
388.7
407.8
420.7
428.9
433.4
317.1
408.7
463.3
499.3
523.8
540.3
550.9
556.8
–20
242.3
315.1
359.1
388.5
408.8
422.8
431.9
437.3
311.2
404.8
461.3
499.1
525.2
543.1
554.8
561.8
–10
235.9
309.4
354.5
385.1
406.4
421.3
431.3
437.5
303.0
397.4
455.4
494.6
522.0
541.1
554.0
561.9
–5
232.0
305.6
351.1
382.0
403.8
419.0
429.4
435.9
298.0
392.5
451.0
490.7
518.7
538.3
551.6
560.0
10
218.1
290.2
335.8
367.4
389.9
406.0
417.1
424.4
280.2
372.8
431.4
472.0
500.9
521.5
535.8
545.1
–40
219.2
266.5
288.9
299.2
302.1
300.0
294.2
285.5
281.5
342.4
371.1
384.3
388.1
385.4
377.9
366.7
–30
220.5
271.2
296.0
308.3
312.8
312.1
307.6
300.0
283.2
348.3
380.2
396.0
401.9
401.0
395.1
385.3
–20
219.7
273.5
300.7
314.9
321.2
321.9
318.6
312.2
282.2
351.3
386.3
404.5
412.6
413.5
409.3
401.0
–10
216.8
273.1
302.6
318.7
326.6
328.8
326.7
321.3
278.5
350.8
388.7
409.4
419.5
422.3
419.6
412.8
–5
214.6
271.9
302.4
319.4
328.0
330.9
329.4
324.6
275.6
349.3
388.4
410.3
421.4
425.0
423.2
417.0
10
205.0
264.0
296.7
316.0
326.6
331.3
331.5
328.2
263.4
339.1
381.2
405.8
419.6
425.6
425.9
421.6
–40
197.3
244.7
268.1
279.6
283.9
283.1
278.7
271.4
253.4
314.4
344.4
359.2
364.6
363.7
358.0
348.6
–30
194.3
244.2
269.6
282.9
288.6
289.2
285.9
279.6
249.6
313.6
346.3
363.3
370.7
371.5
367.3
359.2
–20
189.4
240.7
267.9
282.7
289.9
291.7
289.5
284.2
243.2
309.2
344.1
363.2
372.3
374.7
371.9
365.1
–10
182.5
234.5
262.8
278.9
287.2
290.1
288.9
284.5
234.4
301.2
337.6
358.2
368.9
372.6
371.1
365.4
–5
178.4
230.3
259.0
275.5
284.3
287.7
286.9
282.8
229.2
295.8
332.7
353.9
365.2
369.5
368.5
363.3
10
163.7
213.7
242.3
259.4
268.9
273.1
273.0
269.6
210.2
274.5
311.3
333.2
345.5
350.8
350.7
346.3
Correction for subcooling ∆tsub
The evaporator capacities used must be
corrected if subcooling deviates from 4 K (7.2°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.
∆tsub
Correction factor
Note:
Insufficient subcooling can produce
flash gas.
6
4K
10 K
15 K
20 K
25 K
30 K
35 K
40 K
45 K
50 K
7.2°F
18°F
27°F
36°F
45°F
54°F
63°F
72°F
81°F
90°F
R 22
1.00
1.06
1.11
1.15
1.20
1.25
1.30
1.35
1.39
1.44
R 410A
1.00
1.08
1.15
1.21
1.27
1.33
1.39
1.45
1.50
1.56
R 407C
1.00
1.08
1.14
1.21
1.27
1.33
1.39
1.45
1.51
1.57
R 134a
1.00
1.08
1.13
1.19
1.25
1.31
1.37
1.42
1.48
1.54
R 404A / R 507
1.00
1.10
1.20
1.29
1.37
1.46
1.54
1.63
1.70
1.78
RD1TA102
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
Technical leaflet
Electrically operated expansion valve, type ETS
Capacity
US units
Range –40°F to +50°F
Rated capacity [TR]
ETS 50B
te
[°F]
40
R 410A
R 407C
R 22
R 134a
R 404a
ETS 100B
Pressure drop ∆p [psig]
100
125
150
175
200
100
125
150
175
200
–40
92.2
106.4
60
116.6
80
124.2
131.4
136.6
140.3
143.0
118.4
40
136.7
60
149.8
80
159.6
168.7
175.4
180.2
183.6
–20
89.9
104.4
114.9
122.9
130.4
135.9
139.9
142.8
115.5
134.1
147.6
157.8
167.5
174.5
179.7
183.5
0
86.6
101.2
111.8
120.0
127.7
133.5
137.7
140.9
111.2
129.9
143.6
154.1
164.0
171.4
176.9
180.9
20
82.3
96.6
107.2
115.4
123.2
129.1
133.6
136.8
105.7
124.1
137.7
148.2
158.3
165.9
171.6
175.7
40
77.1
90.9
101.2
109.2
116.9
122.8
127.2
130.5
99.0
116.8
130.0
140.3
150.2
157.7
163.4
167.6
50
74.1
87.6
97.7
105.5
113.1
118.9
123.2
126.4
95.2
112.5
125.4
135.5
145.3
152.7
158.3
162.4
–40
83.1
94.3
101.9
107.2
111.8
114.7
116.3
117.0
106.7
121.2
130.9
137.8
143.6
147.3
149.4
150.2
–20
83.0
94.8
103.0
108.8
113.8
117.1
119.2
120.2
106.6
121.8
132.2
139.7
146.2
150.5
153.1
154.4
0
81.9
94.3
102.9
109.1
114.7
118.4
120.9
122.3
105.2
121.1
132.2
140.2
147.3
152.1
155.3
157.0
20
80.0
92.6
101.6
108.2
114.2
118.3
121.1
122.8
102.7
119.0
130.5
139.0
146.7
152.0
155.6
157.8
40
77.1
89.9
99.0
105.9
112.2
116.6
119.7
121.7
99.0
115.4
127.2
136.0
144.1
149.8
153.8
156.3
50
75.3
88.1
97.3
104.2
110.5
115.1
118.3
120.4
96.8
113.1
124.9
133.8
142.0
147.9
152.0
154.6
–40
79.9
91.6
99.9
106.0
111.5
115.5
118.2
120.0
102.6
117.7
128.3
136.1
143.3
148.4
151.9
154.2
–20
79.3
91.5
100.1
106.5
112.5
116.8
119.8
121.9
101.9
117.5
128.6
136.9
144.5
150.0
153.9
156.6
0
77.9
90.4
99.3
106.1
112.4
117.0
120.3
122.7
100.1
116.1
127.6
136.3
144.4
150.3
154.6
157.6
20
75.7
88.4
97.5
104.5
111.1
116.0
119.5
122.1
97.3
113.5
125.3
134.3
142.7
149.0
153.6
156.8
40
72.8
85.4
94.7
101.8
108.5
113.6
117.3
120.0
93.6
109.7
121.6
130.7
139.4
145.9
150.7
154.2
50
71.1
83.6
92.8
99.9
106.7
111.8
115.6
118.4
91.4
107.4
119.2
128.4
137.1
143.6
148.5
152.0
–40
68.8
76.4
81.0
83.8
85.5
85.9
85.3
83.9
88.3
98.1
104.1
107.7
109.9
110.4
109.6
107.7
–20
69.6
77.9
83.1
86.3
88.5
89.3
89.1
88.0
89.4
100.1
106.7
110.9
113.7
114.8
114.4
113.1
0
69.6
78.5
84.2
87.9
90.7
91.9
92.1
91.4
89.4
100.9
108.2
113.0
116.5
118.1
118.3
117.3
20
68.8
78.2
84.4
88.5
91.8
93.4
93.9
93.6
88.4
100.5
108.4
113.7
117.9
120.0
120.7
120.2
40
67.1
76.9
83.5
88.0
91.6
93.6
94.5
94.5
86.2
98.8
107.2
113.0
117.7
120.3
121.4
121.3
50
66.0
75.9
82.6
87.2
91.0
93.2
94.3
94.3
84.8
97.5
106.1
112.0
116.9
119.8
121.1
121.2
–40
62.5
70.2
75.0
78.0
80.1
80.8
80.5
79.4
80.3
90.2
96.4
100.2
102.9
103.8
103.4
102.0
–20
61.8
70.0
75.3
78.7
81.2
82.3
82.4
81.6
79.4
90.0
96.7
101.1
104.3
105.7
105.8
104.8
0
60.3
68.8
74.5
78.2
81.1
82.6
83.0
82.5
77.4
88.4
95.6
100.5
104.2
106.1
106.6
106.0
20
57.9
66.6
72.5
76.5
79.7
81.4
82.1
81.9
74.4
85.6
93.1
98.2
102.3
104.6
105.4
105.2
40
54.8
63.4
69.3
73.4
76.8
78.7
79.6
79.6
70.4
81.5
89.1
94.3
98.7
101.2
102.2
102.2
50
53.0
61.5
67.3
71.4
74.8
76.8
77.7
77.7
68.1
79.0
86.5
91.7
96.1
98.6
99.8
99.8
Correction for subcooling ∆tsub
The evaporator capacities used must be
corrected if subcooling deviates from 4 K (7.2°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.
∆tsub
Correction factor
Note:
Insufficient subcooling can produce
flash gas.
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
4K
10 K
15 K
20 K
25 K
30 K
35 K
40 K
45 K
50 K
7.2°F
18°F
27°F
36°F
45°F
54°F
63°F
72°F
81°F
90°F
R 22
1.00
1.06
1.11
1.15
1.20
1.25
1.30
1.35
1.39
1.44
R 410A
1.00
1.08
1.15
1.21
1.27
1.33
1.39
1.45
1.50
1.56
R 407C
1.00
1.08
1.14
1.21
1.27
1.33
1.39
1.45
1.51
1.57
R 134a
1.00
1.08
1.13
1.19
1.25
1.31
1.37
1.42
1.48
1.54
R 404A / R 507
1.00
1.10
1.20
1.29
1.37
1.46
1.54
1.63
1.70
1.78
RD1TA102
7
Technical leaflet
Electrically operated expansion valve, type ETS
Dimensions and weight
Type
Connections, ODF solder
/8 × /8
22 × 22
/8 × 11/8
22 × 28
7
/8 × 13/8
22 × 35
11/8 × 11/8
28 × 28
11/8 × 13/8
28 × 35
11/8 × 15/8
28 × 42
1 /8 × 1 /8
28 × 28
11/8 × 13/8
28 × 35
11/8 × 15/8
28 × 42
13/8 × 13/8
35 × 35
13/8 × 15/8
35 × 42
1 /8 × 1 /8
42 × 42
7
7
7
ETS 50
1
ETS 100
H1
Input × output Input × output
5
1
5
H2
mm
26.2
in.
1.0
mm
13.0
H3
in.
0.5
mm
118.1
H4
in.
4.6
mm
196.1
L1
in.
in.
57.5
2.3
7.7
64.5
67.0
30.0
1.2
17.0
0.7
127.1
5.0
205.1
L2
mm
2.5
2.6
8.1
77.0
3.0
85.0
3.3
øD1
mm
in.
57.0
2.2
64.5
2.5
74.5
2.9
64.5
2.5
74.5
2.9
82.5
3.2
67.0
2.6
77.0
3.0
85.0
3.3
77.0
3.0
85.0
3.3
85.0
3.3
Weight
mm
in.
kg
lb.
60.0
2.4
1.5
3.3
60.0
2.4
1.7
3.7
For further information please contact Danfoss
8
RD1TA102
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
Technical leaflet
Electrically operated expansion valve, type ETS
 Danfoss A/S, (RC-CM / MWA), 02 - 2003
RD1TA102
9