Siemens QPL Series Manuale utente

CC1N7221en

27.10.2005 Building Technologies

HVAC Products

7221

QPLx2… QPLx5…/QPHx5…

Pressure Switches QPL…

QPH…

The pressure switches are used for monitoringgas orair pressures.

When the pressure falls below or exceeds the adjusted switching point, the re-

spective electrical circuitwillbe opened or changes over.

The QPL... /QPH…andthis Data Sheet are intended foruse byOEMs whichinte-

grate the pressure switches intheirproducts.

Use

•For the supervision of air or gas pressures in gas trains of gas-fired equipment (gas

burners)

•The QPL.../ QPH…are available aspressure switchesforminimum ormaximum

pressure

•Suited for pressure ranges up to 500 mbar

•Suited for gases of gas families 1,2 and 3 and otherneutral gaseousmedia

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Building Technologies CC1N7221en

HVAC Products 27.10.2005

Warning notes

To avoid injury to persons, damage to property or the environment, the following

warning notes should be observed!

Do not open,interferewith or modify the pressure switch!

•All activities (mounting,installation and service work, etc.) must be performed by

qualified staff

•Before making any wiring changes in the connection area of the switch, completely

isolate the equipment from the mains supply (all-polar disconnection)

•Ensure protection against electric shock hazard by providing adequate protection

for the connection terminals

•Each time work has been carried out (mounting, installation, service work, etc.),

checkto ensurethatwiringisinanorderly state

•Fall or shock can adversely affect the safety functions. Such unitsmust not be put

intooperation,eveniftheydo notexhibitanydamage

•Do not use the pressure switch in inflammable or explosive gas atmospheres

Engineering notes To set the required switching point, remove the cover from the pressure switch and turn

the setting knobclockwise to increase the set value,or counterclockwise todecreaseit

(see scale under«Dimensions»).Replace the coverand secureittopreventtampering.

Mounting notes

•Ensurethatthe relevantnational safetyregulationsare compliedwith

•Checkpiping connectionsandhousing of the pressure switch to ensure thatthere

are no leaks

•The pressure switch can bemounted either horizontally orvertically, but not in a

suspended position (with the scale pointing downward)

•The pressure switch can be connected via a ¼“ thread or O-ring, depending on the

type of switch (refer to «Connection via …»)

QPLx2… QPLx5…/QPHx5…

Gas pressure

test point

Mounting side

(optional)

7221z05e/1005

QPLx2… QPLx5…/QPHx5…

Fixing screws M4

O-ring

Spacers

7221z04e/0702

Gas inlets

(bottom,

optional)

Standard base

Gas pressure

test point

7221z06e/1005

Setting the

switching point

Connectionvia

¼“ (ISO) thread

Connectionvia O

ring

3/7

Building Technologies CC1N7221en

HVAC Products 27.10.2005

Standards andcertificates

Conformityto EECdirectives

- Electromagnetic compatibility EMC (immunity)

- Directive for gas-fired appliances

- Pressure sensing devices for gas burners and gas-fired

appliances

QPLx2…

QPLx5…/QPHx5…

89 / 336 / EEC

90 / 396 / EEC

EN 1854

(CE 0063 BL 1455)

(CE 0085 BR 0021)

ISO 9001: 2000

Cert. 00739 ISO 14001: 2004

Cert. 38233

Disposalnotes

The unit contains electrical and electronic components and must not be disposed of

togetherwith domestic waste.

Local and currently valid legislation mustbe observed.

Mechanical design

-Housingmade of durable plastic with die-cast aluminium base

-Adjustable switching point

-Automatic reset

-Manual resetat QPLx2…on request

The switchingpoint(setpoint)ofthepressure switchistobe setwith theadjusting knob

locatedunder the securing cover.The pressure switch comescalibrated andhasbeen

checked forleaks.

4/7

Building Technologies CC1N7221en

HVAC Products 27.10.2005

Type summary When ordering, please give type reference according to «Type summary».

Pressure switches with automatic reset:

Pressure range ¼“ connection O-ring connection Bauform

1.5...10 mbar QPL22.010A00 ¹) QPL12.010A00 ¹) QPLx2

2.5...50 mbar QPL22.050A00 QPL12.050A00 QPLx2

12.5...75 mbar QPL22.075A00 ¹) QPL12.075A00 ¹) QPLx2

70...280 mbar QPL22.280A00 QPL12.280A00 QPLx2

Pressure range ¼“ connection O-ring connection Bauform

0,7…3mbar QPL25.003 ¹) QPL15.003 ¹) QPLx5

2…10 mbar QPL25.010 QPL15.010 QPLx5

5…50 mbar QPL25.050 QPL15.050 QPLx5

10…150 mbar QPL25.150 QPL15.150 QPLx5

100…500 mbar QPL25.500 ¹) QPL15.500 ¹) QPLx5

Pressure range ¼“ connection O-ring connection Bauform

5...50mbar QPH25.050¹) QPH15.050 ¹) QPLx5

10...150mbar QPH25.150 QPH15.150 QPLx5

¹) On request

Connector for end switch AGA65

- Plug-in connector conforming to DIN EN 175301-803-A

- Triplepole +

- 4.5...11 mm dia./max. 1.5 mm²

Pressure switche

QPL… forminimum

pressure

Pressure switches

QPH…formaximum

pressure

Accessories

5/7

Building Technologies CC1N7221en

HVAC Products 27.10.2005

Technical data Switching voltage DC /ACeffmax.250 V

Switching current

- QPLx2…

- QPLx5… / QPHx5…

ACeff max. 10 A at cosϕ1

ACeff.max.2Aatcosϕ0.5

ACeff.min.20mA

DCmax. 1 A

DC min. 20mA

ACeffmax.6Aat cosϕ1

ACeff.max.2Aatcosϕ0.5

ACeff.min.20mA

DCmax. 1 A

DC min. 20mA

Adjustable operatingpressure range 1.5...500mbar (different ranges, refer to

«Type summary»)

Operatingpressure (short-time)pressure

surge

- QPLx2…

- QPLx5… / QPHx5…

max. 600 mbar for max. 30 s

max. 1,000 mbar for max. 30 s

Operating pressure (continuously)

- QPLx2…

- QPLx5… / QPHx5…

max. 400 mbar

max. 690 mbar

Weight

- QPLx2…

- QPLx5… / QPHx5…

approx.225 g

approx.120 g

Mounting position horizontal or vertical, but not suspended

Safety class

- QPLx2…

- QPLx5… / QPHx5…

Ito VDE 0631

II toVDE0631

Degree ofprotection

- QPLx2…

- QPLx5… / QPHx5…

IP 40 (to be ensured through adequate

mounting)

IP 54

Switching pressure deviation ±15 %, referred to the setpoint

(diaphragm in vertical position)

Gasfamilies I, II,III

Typical hysteresis:

Type reference Switching differential

QPL…/ QPH…<10 mbar 0.5 mbar

QPL…/ QPH…<50 mbar 1 mbar

QPL…/ QPH…<75 mbar 3 mbar

QPL…/ QPH…>100 mbar 5 mbar

Storage DIN EN 60721-3-1

Climatic conditions class 1K3

Mechanical conditions class 1M2

Temperature range -20...+60°C

Humidity <95%r.h.

Transport DINEN60 721-3-2

Climatic conditions class 2K2

Mechanical conditions class 2M2

Temperature range -40...+60°C

Humidity <95%r.h.

Operation DINEN60721-3-3

Climatic conditions class 3K5

Mechanical conditions class 3M2

Temperature range -20...+60°C

Humidity <95%r.h.

Condensation, formation ofice and ingress ofwater are not permitted!

General data

Environmental

conditions

6/7

Building Technologies CC1N7221en

HVAC Products 27.10.2005

Function Function with automatic reset.

Switch opens the electrical circuit when the air or gaspressure fallsbelow the set

value.

Switch opens the electrical circuit when the air or gaspressure exceeds the set value.

Connection diagram

Pressure switch for minimum pressure

When the pressure falls below the set

value, NO opens and NC closes

Pressure switch for maximum pressure

When thepressure exceedsthe set value,

NC opens and NO closes

COM

7221d01/1005

COM

7221d01/1005

QPL2… QPLx5…/QPHx5…

Connection examples QPLx5… / QPHx5… fitted to VGD20… QPLx5… / QPHx5… fitted to VGD40…

Pressure switches fo

minimumpressure

Pressure switches fo

maximum pressure

Connectionvia

connector to DIN 43650

7/7

Building Technologies CC1N7221en

HVAC Products 27.10.2005

Dimensions

Dimensionsinmm

76.2

Pressure adjustment

Setting range

22.22

Standard

67.8

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

Pressure connection

only QPL2...

Connector to DIN 43650

21.3

7221m01e/1005

SIEMENS

47.63

95.25

50.8

Note: Dimensions for reference only

Securin g co ver for

adjusting knobs

Adjusting knobs

Securing

screw

Gaspressure

test point

Switch contacts

Gas inlets

(bottom)

Standard base

Gas inlets

(side and bottom)

optional

Mounting side (optional)

COM

Gas pressure

test point

Gas pressure

test point

7221m05e/1005

QPLx2…

QPLx5…/QPHx5…

gies HVAC Products GmbH

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