LGW…A2 and KS…A2 air and flue gas pressure switches for burners and ventilation
Country: Germany · Model: LGW…A2 / KS…A2
The adjustable LGW…A2 and KS…A2 pressure switches monitor air, flue and other non-aggressive gases at a maximum working pressure of 10 or 50 kPa, and the housing has IP54 protection. They work on the combustion air side of forced-draught burners, in ventilation systems and in air conditioning installations.
- Types
- LGW…A2, LGW…A2P (with test button), LGW…A2-7 (Pa, factory setting), KS…A2-7 (with Climate-Set kit)
- Ranges
- LGW 1.5; 3; 6; 10; 50; 150; KS 150, 300, 600, 1000
- Functions
- overpressure, vacuum and differential pressure
- Max. working pressure
- LGW 10 or 50 kPa; KS 10 kPa
Technical specifications
| Types | LGW…A2, LGW…A2P (with test button), LGW…A2-7 (Pa, factory setting), KS…A2-7 (with Climate-Set kit) |
|---|---|
| Ranges | LGW 1.5; 3; 6; 10; 50; 150; KS 150, 300, 600, 1000 |
| Functions | overpressure, vacuum and differential pressure |
| Max. working pressure | LGW 10 or 50 kPa; KS 10 kPa |
| Connection | G 1/4 and G 1/8 or fittings for 4.6 mm hose |
| Contacts | silver or gold |
| Protection | IP54 |
| Approvals | LGW: CE, EAC, AGA, UKCA, UA, SIL; KS: EAC, AGA |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
On a burner the switch monitors fan operation, the pressure difference in the air path, vacuum in the furnace or flue, and clogging of air filters. The LGW…A2 measures overpressure, vacuum or differential pressure, and both inputs P+ and P− accept air, flue and non-aggressive gases. Impulse lines are connected with an internal G 1/4 thread on P+ and G 1/8 on P−, or with a 4.6 mm diameter hose on a fitting. The contacts are silver or gold, and the cable is led to screw terminals through a cable entry or connected with a four-pin plug connector. Accessories include appliance plugs, junction boxes, mounting plates, Climate-Set repair kits and 24 V and 220 V signal lamps. The LGW…A2 have CE, EAC, AGA, UKCA, UA and SIL approvals, and EAC and AGA are declared for the KS…A2.
How to choose
First check the working pressure, because depending on the version the LGW withstands 10 or 50 kPa, while the KS only 10 kPa. For burners the LGW 3, 10, 50 and 150 A2 are made, the A2P version with a test button, and the LGW…A2-7 with gold contacts, a factory setting for falling or rising pressure and ranges of 1.5, 3, 6 and 10 on a pascal scale. For ventilation and air conditioning the differential KS 150, 300, 600 or 1000 of the KS…A2-7 series are more often used, with a Climate-Set kit, hose connection and gold contacts.
Request a price and lead time
LGW…A2 and KS…A2 air and flue gas pressure switches for burners and ventilation. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Can LGW…A2 switches be installed on a gas line?
No, the switches are not intended for combustible gas and work on the combustion air side. For gas there are separate switches of the GW series.
What is the maximum working pressure of the LGW and KS switches?
Depending on the version the LGW…A2 are rated for 10 or 50 kPa, and the differential KS…A2-7 for 10 kPa.
How are impulse tubes connected to the LGW switch?
Input P+ has an internal G 1/4 thread and input P− a G 1/8 thread, and there are also fittings for a hose of 4.6 mm diameter. Both inputs are used to monitor a pressure difference.
What protection rating do the LGW…A2 pressure switches have?
The housing has IP54, i.e. protection against dust and water splashes. The switch is fixed directly on the burner or air duct on a mounting plate from the accessories.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.