Siemens QP Series Manuale del proprietario

Siemens Building Technologies, Inc.



QP Series

Technical Instructions

Document No. 155-292

November 11, 2002

Pressure Switches for Gas and Air

GAS0047R1

mbar

Description QP… pressure switches are used for gas and air pressure supervision on industrial and

commercial burner applications.

The QPL31… series pressure switches break the electrical circuit when the pressure

drops below the adjusted value.

The QPH31… series pressure switches break the electrical circuit when the pressure

increases above the adjusted value.

Features • UL listed for USA and Canada, FM approved, ISO 9001 certified;

European approved versions available.

• Adjustable pressure range from 1 to 112 inches water column (WC).

• Automatic and manual reset models.

• Surge protected up to 15 psi.

Product Numbers Table 1.

Pressure Range

Product Number Inches Water

Column (WC) mbar Execution

QPL31.050M00 1 to 20 2.5 to 50

QPL31.140M00 7 to 55 17.5 to 137 Manual Reset Low

QPH31.050M00 2 to 20 5 to 50

QPH31.150M00 10 to 60 25 to 150 Manual Reset High

QPL31.050A00 1 to 20 2.5 to 50

QPL31.075A00 5 to 30 12.5 to 75

QPL31.280A00 28 to 112 70 to 280

Automatic Reset Low

QPH31.050A00 2 to 20 5 to 50

QPH31.090A00 5 to 35 12.5 to 87

QPH31.280A00 28 to 112 70 to 280

Automatic Reset High

Technical Instructions QP Series Pressure Switches for Gas and Air

Document Number 155-292

November 11, 2002

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. Other product or company names mentioned herein may be the trademarks of their respective owners.

U.S.A.

Document No. 155-292

Printed in the U.S.A.

Page 2

Specifications Electrical rating

Maximum operating pressure

Maximum surge pressure

Operating temperature

10A @ 125 to 250 Vac

1/3 HP @ 125 to 250 Vac

6 psi (400 mbar)

15 psi (1 bar) for 2 seconds

–40°F to 140°F (–40°C to 60°C)

Operation

Range Adjustment Remove the cover to adjust the pressure cut-off setting. Turn the range dial clockwise to

increase the pressure setting, or counterclockwise to decrease the pressure setting.

Manual reset models If the yellow ring of the reset button is above the cover, the switch is in the open position

and must be manually reset before continuing burner operation.

Wiring NOTE: Wiring must be performed by a licensed electrician.

COM

LOW

PRESSURE

MODEL

GAS0043R1

Figure 1. Typical Wiring for Low

Pressure Models.

COM

HIGH

PRESSURE

MODEL

GAS0044R1

Figure 2. Typical Wiring for High

Pressure Models.

Mounting • All switches can be mounted in either a horizontal or vertical position.

• All models have a 1/4-inch NPT female pressure connection on the metal base.

• Check connections for leakage after installation.

Dimensions

mbar

INCH

W.C.

3.00"

(76.2 mm)

3.00"

(76.2 mm)

GAS0046R1

2.67"

(67.8 mm)

1/4" N.P.T. (Female)

Gas Inlet

Yellow

Ring

∅.88" (22.22 mm)

(1/2" Connection)

(Manual Reset

Models Only)

Reset Button

.40"

(10.16 mm)

GAS0045R1

Represented By:

POWER EQUIPMENT COMPANY

2011 Williamsburg Road

Richmond, VA 23231

Ph. 804-236-3800

Fx. 804-236-3882

www.peconet.com

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