Siemens QP Series Technical Instructions

QP Series
Pressure Switches for Gas and Air
Description
Features
Product Numbers
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.
• 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 Number
QPL31.050M00
QPL31.140M00
QPH31.050M00
QPH31.150M00
QPL31.050A00
QPL31.075A00
QPL31.280A00
QPH31.050A00
QPH31.090A00
QPH31.280A00
Technical Instructions
Table 1.
Pressure Range
Inches Water
Column (WC)
1 to 20 2.5 to 50
7 to 55 17.5 to 137
2 to 20
10 to 60 25 to 150
1 to 20 2.5 to 50
5 to 30 12.5 to 75
28 to 112 70 to 280
2 to 20
5 to 35 12.5 to 87
28 to 112 70 to 280
Document No. 155-292
November 11, 2002
mbar Execution
Manual Reset Low
5 to 50 Manual Reset High
Automatic Reset Low
5 to 50 Automatic Reset High
Siemens Building Technologies, Inc.