PDF《Compact pressure switches》

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6 Compact pressure switches for gas and air GW…A6 GW…A6/1 Double pressure switch GW… / …A6 5.

01 Technical description The pressure switch GW…A6 and the double pressure switch GW…/.…A6 are adjustable compact pressure switches for ?ring systems. They are suited for switching a circuit on, off or over if the actual pressure value changes compared to the setpoint. The setpoint (switching point) is set on an adjusting wheel with scale. A test nipple is integrated in the metal housing as standard. Application Pressure monitoring in combustion, ventilation and air-conditioning tech- nologies. Suitable for gases of families 1,2,3 and other neutral gaseous media. Approvals EC type test approval as per EC Gas Appliance Directive: GW...A6 CE-0085 AO

3220 EC type test approval as per EC Pres- sure Appliance Directive: GW...A6 CE0036 Approvals in other important gas-con- suming countries. T?V (German Technical Inspector- ate) test as pressure switch;

special construction type as per TRD

604 and VdT?V lea?et, Edition 100/1, as well as Class ?S" as per EN 1854. Printed in Germany ? R?sler Druck ? Edition 02.06 ? Nr.

229 544

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6 Functional description Single-acting pressure switch in over- pressure range. The pressure switches operate without any power supply. Switching response GW…A6 Short response time during pressure ?uctuations. GW…A6/1 Slow response time during short-term pressure fluctuations by additional damping nozzle. GW…A6 pressure switch The control unit responds to pressure. If the setpoint is exceeded or undershot, the circuit is switched on, off or over. GW… / …A6 double pressure switch Combination of two ?anged GW...A6 single pressure switches. The two set- points are set separately and independ- ently. A combination of different setpoint ranges is therefore possible. The two control units are fed from the same medium at the medium's pressure. De?nition of Δp switching dif- ference The Δp switching difference is the pressure difference between the up- per and lower switching pressure. Switching function If pressure increases:

1 NC opens,

2 NO closes. If pressure drops:

1 NC closes,

2 NO opens. COM NO NC

2 1 p

3 COM NO NC

2 1 p

3 N COM NO NC

2 1 p

3 N Pressure at control unit falling ? p switching difference Setting tolerance upper switching pressure lower switching pressure Adjustment when pressure drops rising

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6 Speci?cations Max. operating pressure Pressure connection Measuring connection Temperature range Materials Switching voltage Nominal current Switching current Electrical connection Degree of protection Setting tolerance GW

3 A6 - GW

150 A6

500 mbar (50 kPa) GW

500 A6

600 mbar (60 kPa) Standard: centrally on housing bottom, G 1/4 inner thread as per ISO

228 Special design: additionally G 1/4 inner thread (side right) Test nipple integrated in metal housing ?9 Ambient temperature -15 °C to +70 °C Medium temperatue -15 °C to +70 °C Storage temperature -30 °C to +80 °C Housing: Aluminium die cast Switch part: Polyamide Diaphragms: NBR Switching contact: Ag AC eff. min.

24 V max.

250 V DC min.

24 V max.

48 V GW 10…500 A6 GW

3 A6 AC eff. max.10 A AC eff. max.

6 A AC eff. max.6 A at cos ?

1 AC eff. max.

4 A at cos ?

1 AC eff. max.3 A at cos ? 0,6 AC eff. max.

2 A at cos ? 0,6 AC eff. min.

20 mA AC eff. min.

20 mA DC min.

20 mA DC min.

20 mA DC max.

1 A DC max.

1 A Terminal connection for line sockets as per DIN EN

175 301-803, 3-pin, pro- tection-insulated without ground connection IP