ISIMET
Model FGS-22X2
Fuel Gas Sensor
Installation Instructions
Mounting the Wall Box:
Using the provided mounting brackets and screws, secure the unit within the wall cavity with the face of the box extending to the
wall surface. We recommend that the unit be mounted as appropriate for the gas being used. One foot below the ceiling for natural
gas and one foot above the floor for propane and within 5-10’ of the potential leak source. Tape over or otherwise protect the interior
of the box during the construction phases.
Wiring the Unit to the Utility Controller:
Several knock-outs are provided along the side and back of the Wall Box for your use. A rubber grommet is provided for insertion in
the hole if a 3/8” knock-out is selected. If a hole for ½” electrical conduit is used, then a connector must be field provided.
Providing field wiring (18 AWG min.), make connections to the LA, LSP, or Shop Controller. See Installation Instructions provided
with that unit. Wiring should be color-coded.
Wiring the Fuel Gas Sensor circuit board:
Wiring connects between the Utility Controller and the Fuel Gas Sensor should
conform precisely to these specifications. Make connects at CON 1.
LA, LSP or Shop Controller
Fuel Gas Sensor pcb CON 1
Remote Panic Input
Pin 5 - Dry-contact output
Remote Panic Input
Pin 6 - Dry-contact output
LA, LSP or Shop Controller
12-vac output @ Output Terminal
Pin 4 - 12-vac input
24-vac @ PCB
Pin 3 - 24-vac input (NOT USED)
COM @ Output Terminal
Pin 2 - 24-vac input
Time Delay Settings
@ JP 5:
NO Jumper = 0 sec.
Jumper @ top = 10 sec.
Jumper @ bottom = 20 sec.
2 Jumpers = 30 sec. Delay.
Care should be taken to not change the delay setting to a non-desired period.
ISIMET, LLC
103 C. J. Wise Parkway
Naples, TX 75568
(903) 897-0737
Fuel Gas Sensor pcb
October 2015
DOC# 18406
The
ISIMET
Fuel Gas Sensor features a raw gas sensor, a red/green LED and a
Lamp mounted onto a Stainless Steel Wall Panel. The wall box with mounting
brackets is provided. The Unit is intended for use as a sensor to detect raw fuel
gas. Operating power is derived from an ISIMET Controller and transmits a
signal back to the Controller when raw fuel gas is detected.
Typical detection range is 1 – 25% LEL (Lower Explosion Limit).
or 50 – 10,000 ppm.
