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MOUNTING
• Remove the clear cover from the switch.
• Use 14 or 16 AWG wire rated for at least 75°C
• Route the wires through the conduit connector
• Connect the wiring to the appropriate screw terminals.
CAUTION
: All wiring must comply with local elec-
trical codes, ordinances and regulations.
WIRING
CAUTION:
Do not exceed the switch ratings given
in the specifications and on the switch.
Recommended Mounting Procedure
• Remove the clear cover of the switch in order to remove
the thread forming socket head screws.
• Verify that the O-ring and the groove, in which the O-oring
is placed, are clean and free of notches or burrs.
• Place the O-ring into the groove on the back of the
pressure switch. This is located on the flate side of the
aluminum housing.
• Using a 3 mm hex wrench, remove the G 1/8 plug from
the port on which the switch is to be mounted. This will
be either a flange, the side of the FRI regulator, or a G 1/8
port of Dungs safety shutoff valve.
• Mount the switch onto the port using the thread-forming
socket head screws.
• The O-ring can slide during the mounting process, so it is
recommended that as the switch is pressed onto the port,
visually verify that the O-ring remains in the groove.
• Tighten the screws but do not exceed 22 lb-in.
• Perform a leak test to verify that no leakage occurs around
the O-ring.
GAO (Operating state shown as a
high limit)
.
As pressure rises
above
set point, 1 NC opens, 2 NO closes,
Neon light ON (fault).
As pressure
falls
below set point, switch resets: 1
NC closes and 2 NO opens.
GMH (Operating state shown)
As pressure rises
above set-
point, 2 NO closes, 1 NC opens,
and Neon light ON (fault), switch
trips and locks out.
G M L
(
O p e r a t i n g s t a t e
shown)
As pressure falls
above set-
point, 2 NO opens, 1 NC closes,
Neon light ON (fault), switch trips
and locks out.
Wiring terminal
illustration