User Manual

ManualsBrandsSiemens ManualsRefrigeration Valves (BC7)Modulating refrigerant valve, PN16 M3K..FX..N..

CA2N4741en

2018-02-14

Building Technologies

HVAC Products

741

Modulating Control

Valve PN 16 with

Magnetic Actuator

M3K…FX…N

M3K…FX…NP

for brine circuits, hot water, steam or media containing

mineral oils (M3K…FX…NP)

∂ Fast positioning time (< 2 s)

∂ High-resolution stroke and rangeability

∂ Operating voltage AC 24 V or power signal DC 0…20 V Phs (phase cut)

∂ Selectable electrical interface DC 0…10 V, DC 4…20 mA or DC 0…20 V Phs

∂ Fail-safe feature: control path 1 ↑ 3 closed when de-energised

∂ Low friction, robust, no maintenance required

Use

The control valves are mixing or throughport valves with the magnetic actuator ready

fitted.

The short positioning time, high resolution and high rangeability make these valves

ideal for modulating control of chilled water, low-temperature hot water, high-

temperature hot water, hot water and steam systems or media containing mineral oils in

closed circuits of heating, ventilating and air conditioning systems as well as industry

related applications.

Summary of content (10 pages)

PAGE 1
4 Modulating Control Valve PN 16 with Magnetic Actuator 741 M3K…FX…N M3K…FX…NP for brine circuits, hot water, steam or media containing mineral oils (M3K…FX…NP) ∂ ∂ ∂ ∂ ∂ ∂ Fast positioning time (< 2 s) High-resolution stroke and rangeability Operating voltage AC 24 V or power signal DC 0…20 V Phs (phase cut) Selectable electrical interface DC 0…10 V, DC 4…20 mA or DC 0…20 V Phs Fail-safe feature: control path 1 ↑ 3 closed when de-energised Low friction, robust, no maintenance required Use The contro
PAGE 2
Type summary Type reference 1) DN Χpmax ΧpS SNA Pmed IN [m3/h] [kPa] [kPa] [VA] [W] [A] 500 500 20 5 3.15 40 65 110 26 6 4 30 50 80 40 10 6.3 20 30 50 15 1.5 3.0 M3K15FXN M3K20FXN 20 5.0 M3K25FXN 25 8.0 M3K32FXN 32 12 M3K40FXN 40 20 M3K50FXN 50 30 1) Wire cross-section [mm2] 4-wire connection 4.0 2.5 4.0 Max. cable length L [m] 0.6 M3K15FX06N M3K15FX15N kVS 300 300 Version for media containing mineral oils with type suffix P, e.g.
PAGE 3
Technical and mechanical design For a detailed description of operation, refer to Data Sheet CA1N4028E. Control operation The electronics module converts the positioning signal to a phase-cut power signal which generates a magnetic field in the coil. This causes the armature to change its position in accordance with the interacting forces (magnetic field, counterspring, hydraulics, etc.).
PAGE 4
Water with additives To determine the volumetric flow V% following formula: 100 in case of anti-freeze proportions > 20 % use the V% 100 V% < 100 Q 1.163 √ ΧT √ f Ζm 100 3 Q 100 ∆T / h∴ 1 f1 = Volumetric flow = Nominal system output = Temperature differential between flow and return = Correction factor [m3/h] [kW] [K] The correction factor f 1 can be taken from the following table or calculated with the formula below.
PAGE 5
Mounting Notes Mounting Instructions are included in the packaging: No: 35582 (valve) No. 35541 (terminal housing ZM…) Vorsicht The valve may only be used as a mixing or throughport valve, not as a diverting valve. Observe the direction of flow!! A strainer should be fitted upstream of the valve. This increases reliability. Any Use as straight-through valves Only three-way valves are supplied. They may be used as straight-through valves. Port «2» can be sealed with Z155/...
PAGE 6
Disposal The valve 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 valve 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 Switzerland Ltd / HVAC Products will not assume any responsibility.
PAGE 7
Materials Electrical connection Dimensions / weight Positioning time Ambient temperature Valve body Seat / inner valve Valve stem seal for M…N Valve stem seal for M…NP Bellows Cable entry Min. cross-sectional area Connection terminals Dimensions Weight 1) 2) Norms and standards <2s -5…45 °C spheroidal graphite cast iron EN-GJS-400-18-LT CrNi steel EPDM (O ring) Fluoroelastomer FPM product CrNi steel 2 x PG11 (ZM101/A, ZM111, ZM121/A) 1.5 mm2 screw terminals for max.
PAGE 8
Connection diagrams Refer to data sheet N4591 for the ZM… terminal housings. Application examples The valve may only be used as a mixing or throughport valve, not as a diverting valve. Observe the direction of flow! 3 3 2 1 4741Z02 Caution The examples shown below are basic diagrams with no installation-specific details. 10 x DN [min. 0.
PAGE 9
Dimensions H min. E 4741M01 Dimensions in mm F B L3 D K D2 H2 H min. D L2 L1 Type DN B D D2 K L1 L2 L3 H2 reference H E F Weight [kg] min.
PAGE 10
Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters Theilerstrasse 1a 6300 Zug Switzerland Tel. +41 58-724 24 24 www.siemens.com/buildingtechnologies © Siemens Switzerland Ltd, 2005 Technical specifications and availability subject to change without notice.