C6097 · Edition 01.19 8
Function
3 Function
Pressure switch C6097A switches with falling pressure,
C6097B switches with rising pressure.
Once the set switching point is reached, a micro switch
is activated in the pressure switch which is designed as
a change-over contact.
The switching pressure is adjusted using a hand wheel.
CE approved pressure switches
NC
NO
COM
1
3
4
2
Measurement point
Micro switch
Hand wheel
Screw plug,
Rp 1/4"
Nozzle
0.8 mm
M16 x 1.5
FM approved and UL listed pressure switches
NC
NO
COM
1/2" NPT
Conduit
1
4
Measurement point
Micro switch
Hand wheel
Filter pad/nozzle
Pressure switches which lock off after switching can
only be unlocked with a manual reset, see page 16
(Resetting pressure switches with manual reset).
3.1 Vent limiter
The flow on FM approved and UL listed pressure
switches is limited by the nozzle. In the event of a
diaphragm tear, the escape of gas is limited to less
than 1.0 CFH of natural gas, see max. inlet pressure,
page 23 (UL, FM certified pressure switches), Ad-
justing range, switching hysteresis.