Product Overview

ManualsBrandsSiemens ManualsControl Valves7/8" 2-Port PS43 Modulating Refrigerant Valve with Magnetic Actuator (5 Cv)

721

ACVATIX™

Modulating refrigerant

valves with magnetic

actuator‚ PS43

M3FB..LX..

Soldered connection‚ hermetically sealed

• Modulating control valve for hot-gas applications for capacity control of

refrigeration units and heat recovery systems

• For organic safety refrigerants

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

• Selectable electrical interface ZM.. with DC 0…10 V, DC 4…20 mA or DC

0…20 V Phs positioning signal

• High resolution and control accuracy

• Short positioning time (< 1 s)

• Port AB  A closed when de-energized

• Robust and maintenance-free

• DN 15…32, k

values 0.6…12 m

Use

The M3FB..LX.. 3-port and 2-port valves with magnetic actuators are used for

modulating capacity control of refrigeration units and for heat recovery systems.

They may be used as hot gas diverting or 2-port valves.

Suitable for organic safety refrigerants such as R22, R134a, R404A, R407C, R507,

etc. Not suitable for flammable refrigerants.

CE2N4721en

03.05..2011

Building Technologies

Summary of content (10 pages)

PAGE 1
s 4 721 ACVATIX™ Modulating refrigerant valves with magnetic actuator‚ PS43 M3FB..LX.. Soldered connection‚ hermetically sealed • Modulating control valve for hot-gas applications for capacity control of refrigeration units and heat recovery systems • For organic safety refrigerants • AC 24 V operating voltage or power signal DC 0…20 V Phs (phase cut) • Selectable electrical interface ZM..
PAGE 2
Type summary Type reference M3FB15LX06/A M3FB15LX15/A M3FB15LX/A M3FB20LX/A M3FB25LX/A M3FB32LX Δpmax SNA Pmed kvs Accessories: ZM.. terminal housing DN 15 15 15 20 25 32 kvs AB → A [m3/h] Δpmax AB → A [MPa] [bar] 0.6 1.5 3.0 5.0 8.0 12.0 2.2 2.2 2.2 1.8 1.2 0.
PAGE 3
Sizing Correct valve sizing (to ensure a sufficiently large pressure drop Δpv100 across the fully open valve) is the key to the correct operation of a refrigeration unit. All the components must be coordinated, and this can be ensured only by the refrigeration specialist. The application examples on pages 5 and 6 show the recommended pressure drop in each case.
PAGE 4
+65 -15 -20 t 0 [°C] +60 -10 tC 10 7.0 .0 5 .0 4 .0 3 2.0 .5 1 4721D01 +25 +30 +35 ] +50 R134a (R12) [°C +55 5 ] +2 t fl[°C 30 + +35 +40 +45 +50 +55 +60 +65 +10 +5 0 -5 +45 +40 The example refers to 3-port hot-gas bypass control application. Selection chart Δp V1 00 [b a 1.0 .7 r] 0 .5 0 .4 0 .3 0 -25 0.2 .
PAGE 5
Application examples The diagrams shown here are principles only, without installation-specific details. 3-port hot-gas bypass control application For accurate control of evaporators from 0…100 % refrigeration capacity. • Suitable for test rooms, laboratory systems, small chilled water units and DX evaporators with a refrigeration capacity of up to approx. 40 kW. Recommended differential pressure Δpv100 across the fully opened valve (control path AB → A) 0.
PAGE 6
The hot-gas diverting valve may be used for modulating recovery of the heat from the condenser, even in the event of high differential pressures. Heat recovery Recommended differential pressure Δpv100 across the fully opened valve (control path AB → A) 0.5 < Δpv100 < 1 bar. + + A B AB 4721Z07 – Example: Refrigeration capacity Q0 Refrigerant Condensation temperature tc Evaporation temperature t0 Liquid temperature tfl Selected valve Actual pressure drop Δpv100 67 kW R134a 50 °C 2 °C 45 °C M3FB32LX 0.
PAGE 7
Disposal The device must not be disposed of together with domestic waste. This applies in particular to the the PCB. Legislation may demand special handling of certain components, or it may be sensible from an ecological point of view. Current local legislation must be observed. Warranty Application-specific technical data must be observed. If specified limits are not observed, Siemens Switzerland Ltd will not assume any responsibility.
PAGE 8
Pipe connections Standards Weight Sleeves CE conformity to EMC standard refer to table in « Dimensions » internally soldered sleeves 2004/108/EC Immunity EN 61000-6-2:[2005] Emission EN 61000-6-3:[2007] EN 60730-1 Industrial 3) Residential 3) Electrical safety Housing protection Upright to horizontal IP54 to EN 60529 Environmental compatibility ISO 14001 (Environment) ISO 9001 (Quality) SN 36350 (Environmentally compatible products) RL 2002/95/EC (RoHS) Pressure Equipment Directive PED 97/23/EC Pressure
PAGE 9
Dimensions A B C H3 4721M01 Dimensions in mm H1 A H2 D H2 B L DN Type reference M3FB15LX06/A M3FB15LX15/A M3FB15LX/A M3FB20LX/A M3FB25LX/A M3FB32LX 15 15 15 20 25 32 øD [Inch] ⅝ ⅝ ⅝ ⅞ 1⅛ 1⅜ L 150 150 150 170 200 250 H1 H2 65 65 65 69 72 91 25 25 25 30 36 43 H3 A 184 80 184 80 184 80 238 100 248 100 245 100 B 84 84 84 94 94 94 C 67 67 67 84 94 98 Weight [kg] 4.3 4.3 4.3 8.9 9.5 11.4 D: Pipe connections G: Weight (incl.
PAGE 10
/ 10  2011 Siemens Switzerland Ltd Siemens Building Technologies Modulating refrigerant valves with magnetic actuator‚ PS43 Subject to change CE2N4721en 03.05..