Data Sheet for Product

ManualsBrandsSiemens ManualsRefrigeration Valves (BC7)Kontinuerlig köldmedieventil, PN 53, MVS661..N

Siemens Industry, Inc.

MVS661..N… Series

Technical Instructions

Document No. 155-404

May 11, 2016

Modulating Refrigerant Valves

for Ammonia (R717) and Safety

Refrigerants

Description

Modulating refrigerant valves designed for modulating control of refrigerant circuits

including chillers and heat pumps.

Features

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

 Hermetically sealed.

 Selectable standard control signals 0/2 to 10 Vdc or 0/4 to 20 mA.

 High resolution and control accuracy.

 Precise positioning control and position feedback signal.

 Short positioning time (less than 1 second).

 Closed when de-energized.

 Robust and maintenance-free.

 1-inch (DN 25) with CV (k

) values from 0.12 to 7.28 (0.10 to 6.3 m³/h).

Application

The MVS661..N refrigerant valves are suitable for use in expansion, hot-gas and

suction throttle applications. In addition to ammonia (R717), the valves can handle all

standard safety refrigerants, non-corrosive gases/liquids and CO

(R744). 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 (22 pages)

PAGE 1
Technical Instructions Document No. 155-404 May 11, 2016 MVS661..N… Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Description Modulating refrigerant valves designed for modulating control of refrigerant circuits including chillers and heat pumps. Features  One valve type for expansion, hot-gas and suction throttle applications.  Hermetically sealed.  Selectable standard control signals 0/2 to 10 Vdc or 0/4 to 20 mA.  High resolution and control accuracy.
PAGE 2
Technical Instructions Document Number 155-404 May 11, 2016 Product Numbers MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants The refrigeration capacity refers to applications using ammonia. Table 1. Product Numbers. Product Number Line Size In (mm) CV (kvs) 1 (25) 0.18 (0,16) 0.46 (0,40) 1.16 (1,0) 2.89 (2,5) 7.28 (6,3) MVS661.25-016N MVS661.25-0.4N MVS661.25-1.0N MVS661.25-2.5N MVS661.25-6.
PAGE 3
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Replacement Parts Technical Instructions Document Number 155-404 May 11, 2016 If the valve’s electronics become faulty, the entire electronics housing must be replaced by spare part ASR61, which is supplied with Mounting Instructions (74 319 0270 0).
PAGE 4
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants DIP Switch Configurations Table 3. DIP Switch Configurations.
PAGE 5
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 Forced control input ZC 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 MVS661… Series has a slot to facilitate calibration. To calibrate, insert a screwdriver in the slot so that the contacts inside are connected.
PAGE 6
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Table 4. Indication of Operating State. LED Indication Green Operating State, Function Remarks, Troubleshooting Lit Control mode Automatic operation; everything is OK. Flashing Calibration in progress Wait until calibration is finished (green or red LED will be lit). Calibration error Internal error Recalibrate (operate button in opening 1×).
PAGE 7
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Engineering Notes Technical Instructions Document Number 155-404 May 11, 2016 Depending on the application, additional installation instructions may need to be observed and appropriate safety devices (such as pressostats, full motor protection, and so on) fitted.
PAGE 8
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Installation Notes, Continued  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.
PAGE 9
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Functional valve data Permissible Operating pressure Technical Instructions Document Number 155-404 May 11, 2016 1) Maximum differential pressure pmax Valve characteristic Leakage rate (internally across seat) External seal Permissible media Media temperature Materials Pipe connections max. 914 psi (63 bar) 363 psi (25 bar) Linear Max. 0.002% CV (KVs) resp. Max.
PAGE 10
Technical Instructions Document Number 155-404 May 11, 2016 Agency approvals, Continued MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Environmental compatibility Permissible operating pressure Pressure accessories Fluid group 1 ISO 14001 (environment) ISO 9001 (quality) SN 36350 (environmentally-compatible products) RL 2002/95/EG (RoHS) PED 97/23/EC As per article 1, section 2.1.
PAGE 11
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 Terminal assignment for controller with three-wire connection Figure 5. Common Transformer. U Figure 6. Separate Transformer. Valve position indication (only if required). 0 to 10 Vdc → 0 to 100% volumetric flow 100. Twisted pairs.
PAGE 12
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Application Examples The application examples below reflect principles only. They do not include installationspecific details such as safety elements refrigerant collectors, and so on. Use of the MVS661… as an expansion valve      Typical control range is 20 to 100%.
PAGE 13
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 3 Capacity control kv theoretical = 205 kW/450 = 0.46 m /h (CV=kvs × 1.156=0.46×1.156=0.53). 3 3 Valve MVS661.25-0.4N is suitable, since: 0.46 m /h/0.4 m /h × 100% = 115% (> 50%).  Refrigerant valve MVS661..-.. for capacity control of a dry expansion evaporator.
PAGE 14
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Table 6. Correction Table, Expansion Valve (Fahrenheit). R717 14 R22 tc\to -40 -22 -4 32 324 265 124 32 68 481 488 494 481 376 104 581 590 598 605 140 662 673 683 693 50 tc\to -40 -22 -4 32 82 68 37 14 32 50 124 68 101 104 107 105 81 18 612 618 104 108 701 708 140 104 111 114 118 120 123 108 112 1
PAGE 15
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 Table 7. Correction Table, Expansion Valve (Celsius). R717 tc\to -40 -30 -20 00 324 265 124 20 481 488 40 581 60 R22 -10 0 10 tc\to -40 -30 00 82 68 37 494 481 376 124 20 101 104 107 105 81 18 590 598 605 612 618 40 108 111 114 118 120 123 662 673 683 693 701 708 60 104 108 112 116 119 122 tc\to -40 -30
PAGE 16
Technical Instructions Document Number 155-404 May 11, 2016 MVS661… as a hot-gas valve MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants 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 17
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 Table 8. Correction Table, Hot Gas Valve (Fahrenheit). R717 tc \ to -40 -22 -4 14 32 20 19 14 68 38 38 38 38 R22 32 35 50 tc \ to -40 -22 -4 32 8.9 8.4 6.3 19 68 15.3 15.1 32 50 14.8 14.6 13.2 6.5 104 67 66 65 64 64 63 104 24.2 23.7 23.2 22.8 22.4 22.1 140 110 107 105 103 102 100 140 35.7 34.7 33.8 33.0 32.
PAGE 18
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Table 9. Correction Table, Hot Gas Valve (Celsius). R717 -10 R22 tc \ to -40 -30 -20 0 00 20 19 14 20 38 38 38 38 35 40 67 66 65 64 64 60 110 107 105 103 tc \ to -40 -30 -20 -20 00 20 38.1 60.9 87.3 30.5 59.8 84.9 10 tc \ t o -40 -30 -20 00 8.9 8.4 6.3 -10 0 19 20 15.3 15.1 63 40 24.2 23.
PAGE 19
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 Typical control range 50 to 100%. MVS661… 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 20
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Table 10. Correction Table, Suction Throttle Valve (psi/Fahrenheit). R717 tc R22 tc pv100 \ to -40 -22 -4 14 32 50 pv100 \ to -40 -22 -4 14 32 50 2.2/68 2.7 3.7 4.8 6.0 7.3 8.8 2.2/68 1.2 1.5 1.9 2.4 2.9 3.4 2.2/122 2.3 3.2 4.2 5.2 6.4 7.8 2.2/122 0.9 1.2 1.5 1.9 2.3 2.7 6.5/68 3.2 5.2 7.4 9.7 12.1 14.
PAGE 21
MVS661…N Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Technical Instructions Document Number 155-404 May 11, 2016 Table 11. Correction Table, Suction Throttle Valve (bar/Celsius). R717 tc R22 tc pv100 \ to -40 -30 -20 -10 0 10 pv100 \ to -40 -30 -20 -10 0 10 0.15/20 2.7 3.7 4.8 6.0 7.3 8.8 0.15/20 1.2 1.5 1.9 2.4 2.9 3.4 0.15/50 2.3 3.2 4.2 5.2 6.4 7.8 0.15/50 0.9 1.2 1.5 1.9 2.3 2.7 0.45/20 3.2 5.2 7.4 9.7 12.1 14.8 0.
PAGE 22
Technical Instructions Document Number 155-404 May 11, 2016 MVS661..N Series Modulating Refrigerant Valves for Ammonia (R717) and Safety Refrigerants Dimensions Figure 13. Dimensions in Inches (mm). Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective owners. © 2016 Siemens Industry, Inc.