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CC1N7221en
29.08.2006
QPLx2...
Pressure Switches
The pressure switches are used for monitoring gas or air pressures.
When the pressure falls below or exceeds the adjusted switching point, the re-
spective electrical circuit will be opened or changes over.
The QPL... and this Data Sheet are intended for use by OEMs which integrate the
pressure switches in their products.
•
For the supervision of air or gas pressures in gas trains of gas-fired equipment (gas
burners)
•
The QPL... are suitable as pressure switches for minimum or maximum pressure
•
Suited for pressure ranges up to 500 mbar
•
Suited for gases of gas families 1, 2 and 3 and other neutral gaseous media
7
QPLx5...
QPL...
Building Technologies
HVAC Products
221
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Summary of Contents for Siemens QPL Series
- Page 1 QPLx2… QPLx5… QPL… Pressure Switches The pressure switches are used for monitoring gas or air pressures. When the pressure falls below or exceeds the adjusted switching point, the re- spective electrical circuit will be opened or changes over. The QPL... and this Data Sheet are intended for use by OEMs which integrate the pressure switches in their products.
- Page 2 Warning notes To avoid injury to persons, damage to property or the environment, the following warning notes should be observed! Do not open, interfere with or modify the pressure switch! • All activities (mounting, installation and service work, etc.) must be performed by qualified staff •...
- Page 3 Standards and certificates Conformity to EEC directives - Electromagnetic compatibility EMC (immunity) 89 / 336 / EEC - Directive for gas-fired appliances 90 / 396 / EEC - Pressure sensing devices for gas burners and gas-fired EN 1854 appliances QPLx2… (CE 0063 BL 1455) QPLx5…...
- Page 4 Type summary When ordering, please give type reference according to «Type summary». Pressure switches with automatic reset: Pressure range ¼“ connection O-ring connection Type 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…...
- Page 5 Technical data General data Switching voltage DC / ACeff max. 250 V Switching current - QPLx2… ACeff max. 10 A at cosϕ 1 AC eff. max. 2 A at cosϕ 0.5 AC eff. min. 20 mA DC max. 1 A DC min.
- Page 6 Connection diagram Pressure switch for minimum pressure Pressure switch for maximum pressure Function when When the pressure falls below the set When the pressure exceeds the set value, value, NO opens and NC closes NC opens and NO closes Connection via connector to DIN 43650 QPLx2…...
- Page 7 (bottom) option Gas pressure test point 95.25 Gas inlets (side and bottom) optional 1/4" Mounting side (optional) Note: Dimensions for reference only Switch contacts ©2006 Siemens Building Technologies HVAC Products GmbH Subject to change! Building Technologies CC1N7221en HVAC Products 29.08.2006...