A.J. Antunes & Co FGM-H150 8271007150 - Manual (Page 2)

Operation
LOW GAS PRESSURE MODELS
Low gas pressure switches break the electrical circuit on
pressure drop at the point when gas pressure becomes
lower than the indicated set pressure.
In order to reset the switch, the gas pressure in the
chamber must be higher than the indicated setting. For
manual reset switches, the reset button must also then be
pressed.
HIGH GAS PRESSURE MODELS
High gas pressure switches break the electrical circuit
when pressure rises above the indicated preset pressure.
In order to reset the switch, the gas pressure in the
chamber must be lower than the indicated setting. For
manual reset switches, the reset button must also then be
pressed.
RANGE ADJUSTMENT (ALL MODELS)
To adjust gas pressure cutoff setting, remove the cover.
Turn the range scale adjustable knob (Figure 6) clock-
wise to increase pressure setting, counterclockwise to
decrease pressure setting. Install cover and tighten the
two cover screws to prevent tampering.
A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
Versa Plus Gas Pressure Switches Installation Information
1-630-784-1000 Fax: 630-784-1651 Page 2 of 4 P/N 1011063 Rev. B 06/12
1-800-253-2991
RANGE SCALE
(ADJUSTABLE KNOB)
RESET BUTTON
Manual Reset Automatic Reset
Figure 6
Figure 1 Figure 2
Figure 3 Figure 4
OPTIONAL SWITCH BASE SIDE
MOUNTING SUGGESTIONS
WITH “O” RING
Figure 5
OPTIONAL SWITCH BASE
SIDE-By-SIDE MOUNTING
SUGGESTIONS HIGH AND
LOW GAS PRESSURE
OPTIONAL SWITCH BASE
BOTTOM MOUNTING
SUGGESTIONS WITH
“O” RING
STANDARD SWITCH BASE
REMOTE MOUNTING
SUGGESTIONS
STANDARD SWITCH BASE
PANEL MOUNTING
SUGGESTIONS
Mounting
All switches can be mounted in either horizontal or verti-
cal position. Switches should be reasonably level but do
not require accurate leveling.
Single gas switch models have a 1/4" NPT (female) gas
inlet on the standard base.
Piping can either be standard black pipe or aluminum tub-
ing.
All switches can be support by the inlet pipe, but optional
mounting brackets and bases are available (see Figures
1 through 5).
Switches have been factory calibrated and tested for
leaks. However, it is recommended that switch, gas pipe
inlets, and connections be soap bubble tested for leaks
after installation.