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ManualsBrandsSiemens ManualsRefrigeration Valves (BC7)Modulating refrigerant valves / Stetige Kältemittelventile PS45, MVL661..

Siemens Industry, Inc.

MVL661… Series

Technical Instructions

Document No. 155-400

May 11, 2016

Modulating Refrigerant Valves

with Magnetic Actuator

Description

Control valves with magnetic actuator, for modulating control of refrigerant circuits.

Features

 One valve type for expansion, hot-gas and suction throttle applications.

 Hermetically sealed towards outside.

 Selectable control signal interface 0/2...10 Vdc or 0/4...20 mA.

 High resolution and control accuracy.

 Precise positioning control and position feedback signal.

 Short positioning time (less than1 second).

 Closed when de-energized.

 Robust and maintenance-free.

 Five valve sizes with CV (k

) values from 0.29 to 13.9 (0.25 to 12).

Application

The MVL661...Series refrigerant valves are designed for modulating control of

refrigerant circuits including chillers and heat pumps. They can be used in expansion,

hot-gas and suction throttle applications as well as with all commonly used safety

refrigerants (R22, R134a, R227ea, R404A, R407C, R410A, and so on) and R744

(CO

). They are not suitable for flammable refrigerants.

Product Numbers

See Product Summary.

Warning/Caution

Notations

WARNING:

Personal injury or loss of life may occur if you do not

follow the procedures as specified.

CAUTION:

Equipment damage or loss of data may occur if you

do not follow the procedures as specified.

Summary of content (23 pages)

PAGE 1
Technical Instructions Document No. 155-400 May 11, 2016 MVL661… Series Modulating Refrigerant Valves with Magnetic Actuator Description Control valves with magnetic actuator, for modulating control of refrigerant circuits. Features  One valve type for expansion, hot-gas and suction throttle applications.  Hermetically sealed towards outside.  Selectable control signal interface 0/2...10 Vdc or 0/4...20 mA.  High resolution and control accuracy.
PAGE 2
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Product Numbers Product Summary Line Size Inch (mm) MVL661.15-0.4 1/2 (15) MVL661.15-1.0 1/2 (15) MVL661.20-2.5 3/4 (20) MVL661.25-6.3 1 (25) MVL661.32-12 1-1/4 (32) CV (kvs) CV (kvs) Reduced 1) pmax psi (MPa) 0.46 (0.40) 0.29 (0.25) 1.2 (1.0) 0.73 (0.63) 2.9 (2.5) 363 (2.5) 1.8 (1.6) 7.3 (6.3) 4.6 (4) 13.9 (12) 9.2 (8) 29 (0.
PAGE 3
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical/ Mechanical Design Features and Benefits Control Technical Instructions Document Number 155-400 May 11, 2016  Four selectable control signals.  DIP switch to reduce the CV (kvs) value to 63% of the nominal value.     Potentiometer for adjustment of minimum stroke for suction throttle applications. Automatic stroke calibration. Forced control input for “Valve closed” or “Valve fully open”.
PAGE 4
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 CV (KVS) reduction For CV (kvs) reduction (DIP switch 4 in position ON), the stroke is limited to 63% mechanical stroke. 63% of full stroke then corresponds to an input/output signal of 10V. If, in addition, the stroke is limited to 80%, for example, the minimum stroke is 0.63 × 0.8 = 0.50 of full stroke.
PAGE 5
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Signal priority 1. Forced control signal ZC 2. Signal input Y and/or minimum .stroke setting with potentiometer Rv possible. Calibration The printed circuit board of the MVL661… Series has a slot to facilitate calibration. To calibrate, insert a screwdriver in the slot so that the contacts inside are connected.
PAGE 6
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Connection type NOTE: Four-wire connections are always preferred. Product Number 4-wire connection 3-wire connection (W) (A) 14 MVL661..-.. 22 12 1.6 to 4A 213 (65) 361 (110) 525 (160) MVL661..-.. 22 12 1.6 to 4A 65 (20) 115 (35) 164 (50) SNA Pmed IF L 1) All 2) Sizing Wire Gauge (AWG) 12 10 Max.
PAGE 7
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Expansion application Technical Instructions Document Number 155-400 May 11, 2016 To prevent formation of flash gas on expansion applications, the velocity of the refrigerant in the fluid pipe may not exceed 3.5 ft/s (1 m/s). To assure this, the diameter of the fluid pipe must be greater than the nominal size of the valve, using reducing pieces for making the connections to the valve.
PAGE 8
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016  The flame should be large enough to ensure that the junction heats up quickly and the valve does not get too hot.  The flame should be directed away from the valve.  During soldering, cool the valve with a wet cloth, for example, to ensure that it does not become too hot.  Port B must be sealed off when a 2-port valve (AB  A) is used.
PAGE 9
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Electrical connections Functional data of valve Technical Instructions Document Number 155-400 May 11, 2016 Cable entry glands 3 × ø × 17 mm (for M16) Min. wire size Max. cable length 20 AWG (0.75 mm See Connection Type 2) Nominal pressure Permissible Operating pressure 232 psi (PN 16) 1) Max. differential pressure pmax Valve characteristic (stroke vs.
PAGE 10
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Agency approvals 2 Degree of protection Electrical safety Protection class Degree of pollution 3 Vibration Environmental compatibility Pressure accessories Fluid group 2 IP65 as per EN 60529 Conforms to CE requirements UL Certified to UL 873 Cul Certified to CSA C22.2 No.
PAGE 11
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Connection Diagrams Terminal assignment for controller with four-wire connection (preferred method) Figure 3. Common Transformer. Figure 4. Separate Transformer. Figure 5. Common Transformer. Figure 6. Separate Transformer. Terminal assignment for controller with three-wire connection U Valve position indication (only if required).
PAGE 12
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Valve Sizing and Correction Factor The applications and tables on the following pages are designed for help with selecting the valves.
PAGE 13
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Note on interpolation Technical Instructions Document Number 155-400 May 11, 2016 In practice, the KE, KH or KS value can be estimated because the theoretical C V (kvs)value ascertained will be rounded off by up to 30% to one of the ten available CV (kvs)values, allowing you to proceed directly at Step 4.
PAGE 14
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Capacity control, continued  Refrigerant valve MVL661..-.. for capacity control of a chiller. - Typical control range 10 to 100%. - Energy-efficient operation with low loads. - Allows wide adjustment of condensing and evaporating temperatures. - Ideal for use with plate heat exchangers. - Very high degree of frost protection. Figure 8. Chiller Capacity Control.
PAGE 15
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Table 4. Correction Table, Expansion Valve (Fahrenheit). R22 tc\to -40 -22 -4 32 68 104 140 82 101 108 104 68 104 111 108 37 107 114 112 R134a 14 105 118 116 32 81 120 119 50 tc\to -40 -22 -4 14 32 50 18 123 122 32 68 104 140 27 71 74 67 74 78 72 77 81 76 66 85 81 43 89 85 92 89 R290 1) R744 tc\to -40 -22 -4 32 68 226 262 245 149 264 247 -4 14
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MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Table 5. Correction Table, Expansion Valve (Celsius). R22 R134a tc\to -40 -30 -20 -10 0 10 tc\to -40 -30 -20 -10 0 10 00 20 40 60 82 101 108 104 68 104 111 108 37 107 114 112 105 118 116 81 120 119 18 123 122 00 20 40 60 27 71 74 67 74 78 72 77 81 76 66 85 81 43 89 85 92 89 R290 1) R744 tc\to -40 -30 -20 -10 -20 00 20 226 262 245 149 264 247
PAGE 17
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Use of the MVL661… as a hot-gas valve Technical Instructions Document Number 155-400 May 11, 2016 The control valve throttles the capacity of a compressor stage. The hot gas passes directly to the evaporator, and allows capacity control in the range from 100% down to approximately 0%.
PAGE 18
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Table 6. Correction Table, Hot Gas Valve (Fahrenheit). R22 tc \ to -40 -22 -4 32 68 104 140 8.9 15.3 24.2 35.7 8.4 15.1 23.7 34.7 6.3 14.8 23.2 33.8 R134a 14 14.6 22.8 33.0 32 13.2 22.4 32.3 50 tc \ to -40 -22 -4 -14 32 50 6.5 22.1 31.7 32 68 104 140 4.5 9.8 15.9 23.8 9.6 15.6 23.2 9.5 15.3 22.7 9.2 15.1 22.3 7.4 14.9 21.9 14.7 21.6 R290 1) R744 tc \ t
PAGE 19
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Table 7. Correction Table, Hot Gas Valve (Celsius). R22 tc \ to -40 -30 -20 00 20 40 60 8.9 15.3 24.2 35.7 8.4 15.1 23.7 34.7 6.3 14.8 23.2 33.8 -10 14.6 22.8 33.0 R134a 0 13.2 22.4 32.3 10 tc \ to -40 -30 -20 -10 0 10 6.5 22.1 31.7 00 20 40 60 4.5 9.8 15.9 23.8 9.6 15.6 23.2 9.5 15.3 22.7 9.2 15.1 22.3 7.4 14.9 21.9 14.7 21.6 R290 1) R744 tc \ to -40
PAGE 20
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Typical control range 50 to 100%. Use of the MVL661… as a suction throttle valve Figure 11. Suction Throttle Valve Application. Minimum stroke limit control: To ensure optimum cooling of the compressor, either a capacity controller must be provided for the compressor, or a minimum stroke must be set using the valve electronics.
PAGE 21
MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Table 8. Correction Table, Suction Throttle Valve (psi/Fahrenheit). R22 tc R134a tc pv100 \ to -40 -22 -4 14 32 50 pv100 \ to -40 -22 -4 14 32 50 2.2/68 1.2 1.5 1.9 2.4 2.9 3.4 2.2/68 0.7 1.0 1.4 1.8 2.2 2.7 2.2/122 0.9 1.2 1.5 1.9 2.3 2.7 2.2/122 0.5 0.7 1.0 1.3 1.7 2.1 6.5/68 1.5 2.3 3.0 3.9 4.8 5.7 6.5/68 0.7 1.2 1.
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MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Table 9. Correction Table, Suction Throttle Valve (bar/Celsius). R22 tc R134a tc pv100 \ to -40 -30 -20 -10 0 10 pv100 \ to -40 -30 -20 -10 0 10 0.15/20 1.2 1.5 1.9 2.4 2.9 3.4 0.15/20 0.7 1.0 1.4 1.8 2.2 2.7 0.15/50 0.9 1.2 1.5 1.9 2.3 2.7 0.15/50 0.5 0.7 1.0 1.3 1.7 2.1 0.45/20 1.5 2.3 3.0 3.9 4.8 5.7 0.45/20 0.7 1.2 1.
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MVL661… Modulating Refrigerant Valves Valves with Magnetic Actuator Technical Instructions Document Number 155-400 May 11, 2016 Dimensions Product Number Line Size D L H1 H2 H3 H4 MVL661.15-0.4 1/2 5/8 5.51 (140) 1.73 (44) 1.42 (36) 4.45 (113) 9.7 (4.4) MVL661.15-1.0 1/2 5/8 5.51 (140) 1.73 (44) 1.42 (36) 4.45 (113) 9.7 (4.4) MVL661.20-2.5 3/4 7/8 5.90 (150) 1.61 (41) 1.61 (41) 4.69 (119) MVL661.25-6.3 1 1-1/8 6.30 (160) 1.57 (40) 1.85 (47) 4.96 (126) 10.1 (4.