Fireboy- Xintex S-2A User Manual

S-2A

Propane / CNG Fume Detector with Solenoid Valve Control

Installation and Operation Manual

MADE IN THE USA.

• Automatic Solenoid Control

• Dual Sensor Capability

• Microcomputer Operation

• Solid State Sensors

• Self Testing Circuitry

READ THIS MANUAL CAREFULLY AND
SAVE FOR FUTURE REFERENCE. KEEP
THIS MANUAL WITH THE S-2A.

Introduction
The S-2A vapor-monitoring system utilizes advanced technology for detection of propane (LPG)
fuel vapors as well as CNG (Compressed Natural Gas). The S-2A allows the connection of two
(2) sensors and has both visual and audible alarms. Test switches are provided for full checking
of all operations. System operation and correct sensor operation are continually monitored and
indicators are provided for fault detection. The S-2A has an internal relay for automatic control of
fuel solenoid. Read this owner’s manual completely before installation. Failure to read and follow
these instructions can result in damage to the unit voiding the warranty.

Components This Kit Includes

• One S-2A Display w/Bezel • Four screws for the display

• One SV-1 Solenoid Valve • Two screws for the sensor

• One 20 MS-2 Sensor

CAUTION: NO POWER ON/OFF SWITCH IS PROVIDED FOR THIS UNIT. TO
FUNCTION AS INTENDED, THE S-2A MUST BE CONNECTED TO A CORRECT
POWER SOURCE, AND FOR MAXIMUM EFFECTIVENESS, BE POWERED AT
ALL TIMES WHILE ABOARD. IF POWER IS ON AND LEFT UNATTENDED FOR AN
EXTENDED PERIOD OF TIME, BATTERY POWER MAY BE DIMINISHED.

P/N: 18122 Page 1 Rev. 1.0
Rev Date: 9/7/07

Tools Required and Hardware

• Screw Drivers (Slotted & Phillips) • Hole Saw 2-1/16” diameter

• Electrical Connector Crimping Tool • Two 1 Ampere Fuse
With Wire Stripper • Wire Nuts (#16 Gauge Wire)

• Power Drill • A Length of #16 Gauge Wire

• Electrical Tape • Tape Measure and Pencil

• Drill — 3/4 (19.05mm) Diameter • Crescent Wrench

• Drill — 1/8” (3-17mm) Diameter • 2 in-Line fuse Holder -

Manual Display Controls / Indicator
A - Solenoid Valve Indicator
B - Sensor #1 Indicator
C - Sensor #2 Indicator
D - Unit Fault Indicator
E - Solenoid Valve On/Off Switch
F - Sensor #1 Test Switch
C - Sensor #2 Test Switch
H - Horn Mute Switch
I - Audible Horn (Internal)

Indicator Definitions
Solenoid Indicator
Green = Solenoid Control on
Off = Solenoid Control off
Sensor #1 & #2
Green = Sensor active, no fumes detected Figure 1
Amber = Sensor failure
Red = Fumes detected! alarm condition
Flashing Green = Sensor warm up period
Off = No sensor detected on power-up
Unit Fault
Off = Unit Functional
Amber = Fault Detected, horn beeping

Display Installation
The S-2A should be mounted in a convenient location, preferably at the source of propane usage
(i.e. galley, heater, etc…) where the visual indicators may be readily seen. To install the display,
you must first remove the snap-on bezel by inserting a small, flat blade screwdriver into the slot
located on either side of the bezel and carefully prying up until the bezel snaps free. (See figure 5)

CAUTION: Do not attempt to remove the four (4) screws, which are now exposed which attach
the printed circuit panel to the frame. Doing so will void all warranties.
Next, drill a 2-1 /16” diameter hole into the panel. Slip the instrument through the hole and
secure, making sure that you have access to the terminals for solenoid valve connections, positive
and negative terminal connections and sensor(s) connections.

Plug in your sensor to connector one and make positive and negative connections for the display
and solenoid valve. Finish the installation by fastening to panel with four screws (provided) and
snapping bezel back into place.

P/N: 18122 Page 2 Rev. 1.0
Rev Date: 9/7/07

Sensor Installation
The sensor supplied with the S-2A includes a
standard 20 foot ( 8.29m) cable. If a longer cable
is desired contact your dealer or Fireboy-Xintex.
Coil excessive cable in a convenient location.
Remove the paper covering the adhesive backing
on the sensor-mounting surface and press the
sensor into position on a previously cleaned
surface. Install with two (2) screws provided.

CAUTION: Do not attempt to use any other
manufacturer’s sensor or previously installed
sensors.
Figure 2

Sensor Location
CAUTION: Propane is heavier than air and will

settle. Therefore it is important that a location be
selected that is as low as practical and as near the
appliance as is possible. Keep sensor dry.

CNG (Compressed Natural Gas) is lighter than air and will rise. Therefore, it is important that a
location be selected that is within nine (9”) inches (22.86cm) of the ceiling height. Do not locate
sensor directly over cooking or heating appliances. Keep sensor dry.

Solenoid Installation

Propane (LPG) — Mount the solenoid in-line on the tank

side of the LPG regulator as close to the tank as is practical.
The tank itself should be mounted outside the cabin or
crew quarters to avoid the possibility of gas accumulation
due to a leak between the tank and the solenoid valve.

CNG — Because of the high tank pressure of CNG, the
solenoid valve MUST be installed after the CNG regulator
and as close to the regulator as practical. The tank
and regulator should be mounted outside the cabin or
crew quarters to avoid the possibility of gas accumulation
due to a leak between the tank and the solenoid valve,

NOTE: DO NOT over-tighten fittings. Doing so will cause
the solenoid valve to malfunction. After installation, check
all fittings for leaks with a soapy water solution - NEVER Figure 3
use flame to check for leaks. Use 2 wrenches when tightening
connections to avoid twisting the valve and causing damage.

P/N: 18122 Page 3 Rev. 1.0
Rev Date: 9/7/07