20
Part No. 6-847684-00 Rev. D01
Wiring Schematic 8: Remote Pressure / Vacuum Switches
P/N 6-129020-01
(Dual switch for medical gases with 50 PSI nominal pressure)
P/N 6-129021-01
(Dual switch for medical gases with 175 PSI nominal pressure)
P/N 6-129022-01
(Single switch for vacuum)
1/4 NPT female port
1/4 NPT
female port
seven - approx. 18” free leads
through 3/4” conduit connection
terminal strip
1/2” conduit
connection
ground
screw
low
high
adjustment
dials
high
low
high
yellow
brown*
orange*
purple*
red*
blue
(N/C)
(N/C)
(N/O)
(N/O)
(C)
(C)
NOTE:
Switch contacts shown with
50 PSI pressure applied.
Low switch is
preset at 40 PSI.
High switch is preset at 60
PSI.
*Wires/contacts to be used with MEGA2 alarm system
adjustment
screws
NOTE:
Switch contacts shown with 20
inHg vacuum applied.
Low switch is
preset at 12 inHg.
green
ground
low
low
high
yellow
brown*
orange*
purple*
red*
blue
(N/C)
(N/C)
(N/O)
(N/O)
(C)
(C)
NOTE:
Switch contacts shown with 175
PSI pressure applied.
Low switch is
preset at 140 PSI.
High switch is preset at 190 PSI.
*Wires/contacts to be used with MEGA2 alarm system
1/4 NPT female port
four - approx. 18” free leads
through 3/4” conduit connection
low
adjustment
dial
*Wires/contacts to be used with MEGA2 alarm system
low
purple*
red*
blue
(N/C)
(N/O)
(C)
green
ground
P/N 0208-5096-300
(Single switch for medical gases with 175 PSI nominal pressure)
1/4 NPT male port
three - approx. 12” free leads
through 1/2” NPT conduit connection
adjustment
sleeve
NOTE:
2 Switches Required.
Switch contacts shown
with 175 PSI pressure
applied.
Switch is preset at 195
PSI increasing.
Installer must set low
switch to 140 PSI
decreasing.
*Wires/contacts to be used with MEGA2 alarm system
low
purple*
red*
blue
(N/C)
(N/O)
(C)
high
purple*
red
blue*
(N/C)
(N/O)
(C)
