User Manual

ManualsBrandsSiemens ManualsRefrigeration Valves (BC7)Modulating refrigerant valves with magnetic actuator, PS63, MVS661..EX

A6V11160433en

2018-07-17

Building Technologies

A6V11160433

II 3G

Operating Instruction

Modulating refrigerant

valves, PN 63

MVS661..EX

for ammonia (R717) und CO

(R744).

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

∂ Certification per ATEX Directive 2014/34/EU

∂ Test certificate: SEV 17 ATEX 0110 X

∂ Hermetically sealed

∂ Selectable standard interface DC 0/2...10 V or DC 0/4...20 mA

∂ High resolution and control accuracy

∂ Precise positioning control and position feedback signal

∂ Short positioning time (< 1 second)

∂ Closed when deenergized

∂ Robust and maintenance-free

∂ DN 25 with k

values from 0.10 to 6.3 m³/h

Note

Refrigerant valve MVS661..EX is a device per ATEX Directive 2014/34/EU Appendix II

as well as per IEC 60079-0 from device group II category 3G that may be used per

directive 99/92/EG (ATEX 137) in zone 2 as well as gas groups IIA, IIB, and IIC, at risk

of explosion by flammable materials in the range of temperature classes T1 to T4.

The permissible ambient temperature range is -25°C to +55°C.

The housing must be protected against shock waves for a temperature range of -25 °C

≤ Tamb ≤ -15 °C. See Requirement "Environment" under Special conditions for protec-

tion against explosion, page 9.

II 3 G Ex ec IIC T4 Gc

Summary of content (14 pages)

PAGE 1
s A6V11160433 II 3G Operating Instruction Modulating refrigerant valves, PN 63 MVS661..EX for ammonia (R717) und CO2 (R744). ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ ∂ One valve type for expansion, hot-gas and suction throttle applications Certification per ATEX Directive 2014/34/EU Test certificate: SEV 17 ATEX 0110 X Hermetically sealed Selectable standard interface DC 0/2...10 V or DC 0/4...
PAGE 2
The MVS661..EX refrigerant valve is designed for modulating control of refrigerant circuits including chillers and heat pumps. It is suitable for use in expansion, hot-gas and suction throttle applications. In addition to ammonia (R717), the valve can handle all standard safety refrigerants, noncorrosive gases / liquids and CO 2 (R744). It is not suited for use with inflammable refrigerants. Type summary The refrigeration capacity refers to applications using ammonia. Product number Item no.
PAGE 3
Spare parts Replacement electronics ASR61EX Should the valve’s electronics become faulty, the entire electronics housing is to be replaced by spare part ASR61EX, which is supplied complete with Mounting Instructions (A5W00036611). Rev. no. See table on page 14.
PAGE 4
When k vs reduction (DIL switch 4 in position ON) the stroke will be limited to 63 % mechanical stroke. 63 % of full stroke then corresponds to an input / output signal of 10 V. If, in addition, the stroke is limited to 80 %, for example, the minimum stroke will be 0.63 x 0.8 = 0.50 of full stroke. In the case of the suction throttle valve, it is essential that a minimum stroke limit be maintained to ensure compressor cooling and efficient oil return.
PAGE 5
Calibration 01124 The printed circuit board of the MVS661..EX has a slot to facilitate calibration. To make the calibration, insert a screwdriver in the slot so that the contacts inside are connected. As a result, the valve will first be fully closed and then fully opened. Calibration matches the electronics to the valve’s mechanism. During the calibration process the green LED flashes for about 10 seconds; refer to "Indication of operating state" (page 5). MVS661..
PAGE 6
Sizing For accurate valve sizing, we recommend using the "Refrigeration VASP" software sizing tool, available from your local Siemens office. Engineering notes Additional installation notes may also need be observed as well as the use of proper safety elements (e.g. pressure switches, motor protection) depending on the particular application.
PAGE 7
II 3G Mounting notes Use only properly qualified technicians to mount and commission the valve. The same applies to replacement electronics and configuring the controller (e.g. SAPHIR or PolyCool). Comply with all requirements per EN 60079-14 for use/installation of the valve. Additional installation notes may also need be observed as well as the use of proper safety elements (e.g. pressure switches, motor protection) depending on the particular application..
PAGE 8
Connection terminals G Operating voltage AC / DC 24 V G DC 0 ... 10 V / 2 ... 10 V 0 ... 20 mA / 4 ... 20 mA Control signal Measuring neutral (= G0) U DC 0 ... 10 V / 2 ... 10 V 0 ... 20 mA / 4 ...
PAGE 9
II 3G Special conditions of safe use for Ex Equipment Cabling and conduits The MVL661 *** refrigerating valve are to be connected via cable and corresponding Ex certified cable glands suitable for this purpose. Cable and conduit entries The unused inlet openings with predefined breakouts locations shall be closed with separate "Ex e" sealing plugs.
PAGE 10
Disposal The device is considered electrical and electronic equipment for disposal in terms of the applicable European Directive and may not be disposed of as domestic garbage. ∂ Dispose of the device through channels provided for this purpose. ∂ Comply with all local and currently applicable laws and regulations. Warranty Application-specific technical data must be observed. If specified limits are not observed, Siemens Building Technologies / CPS Products will nor assume any responsibility.
PAGE 11
Functional valve data Materials Dimensions and weight Pipe connections Standards, directives and approvals Maximum cable length Permissible operating pressure Differential pressure Δpmax Valve characteristic (stroke, k v) Leakage rate (internally across seat) External seal Permissible media Media temperature at valve inlet (A) Media temperature at valve outlet (AB) Stroke resolution ΧH / H100 Hysteresis Mode of operation Position when deenergized Mounting position Valve body Seat / piston Sealing disk
PAGE 12
Fluid group 1 General environmental conditions Climatic conditions Temperature Humidity 1) 2) 3) 4) 5) 6) 7) Without CE-marking as per article 4, section 3 (sound engineering practice) Operation EN 60721-3-3 Class 3K6 7) –25...55 °C 10...100 % r. h. Transport EN 60721-3-2 Class 2K3 –25...70 °C < 95 % r. h. Storage EN 60721-3-1 Class 1K3 –5...45 °C 5...95 % r. h. Use the appropriate ferrules on multistrand wiring. Use the appropriate double ferrules when using two wires per connection.
PAGE 13
Dimensions 160 ø 60 4717M01 74 124 ø 22.4 ø 33.7 284 210 min.
PAGE 14
ATEX label Siemens Switzerland Ltd, 6300 Zug, Switzerland Type MVL661*** / MVS661*** II 3G Ex ec IIC T4 Gc SEV 17 ATEX 0110 X WARNING – POTENTIAL ELECTROSTATIC CHARGING HAZARD – SEE INSTRUCTIONS Revision numbers Product number Valid from rev. no. MVS661.25-016EX A MVS661.25-0.4EX A MVS661.25-1.0EX A MVS661.25-2.5EX A MVS661.25-6.3EX A Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel. +41 58-724 24 24 www.