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1.
Locate the control panel at the helm where it can be easily seen and heard. Check first to be sure that there
is at least 3 inches of clearance behind the location to allow for mounting and wiring. Drill a 2 1/8 inch
hole and mount the control panel. Use a marine-grade silicone sealer if the unit is exposed to the weather.
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2.
Connect the cable assembly to the control panel and run it to the engine compartment. Secure the run every
18 inches with plastic wire supports.
3.
Locate the sensor in a dry area on a forward bulkhead in the engine compartment. The sensor should be at
the same height as the starter motor. Orient the sensor so that the 4-wire cable is facing down. This will
prevent any water or condensed water vapor from entering the unit. Connect the cable assembly from the
control panel to the sensor.
4.
Connect a 1A inline fuse holder to the red (+) lead of the control panel. Run a length of red (+) 18-gauge
wire to the positive terminal on the 12V main battery. Run a length of 18-gauge yellow or black (-) wire to
the negative terminal on the 12V battery. Use ring-type insulated crimped connectors at the battery end of
the run. Secure the run every 18 inches with plastic wire supports. As added protection, use adhesive-lined
shrink tubing on all crimped connections.
5.
Upon installation completion, run a system check of both the sensor and the control panel. Be sure to turn
the unit off when leaving the boat, as constant monitoring will run down the 12V battery.
Your assembled system should look similar to the following.
•
DO NOT mount the control panel under a cowling, or a glass or plastic panel where it my not be seen or
heard.
•
DO NOT locate the sensor above batteries. Hydrogen from the batteries may cause false alarms.
•
DO NOT locate the sensor behind an obstruction that will prevent air flow to the sensor.
•
DO NOT locate the sensor on the aft bulkhead. Water on the sensor will cause permanent damage to the
sensor and sensor assembly.
•
DO NOT locate the sensor within 12 inches of exhaust lines. High heat may cause false alarms.
The SA-1 and SA-1XL units have supervisory circuits to warn of a missing sensor, sensor assembly
malfunction, disconnected or a broken connector cable.
1. Press the ON pad on the control panel. The WAIT (YELLOW) light should turn on. Press the TEST pad to
check the operation of the alarm sounder and alarm light. In about two minutes the WAIT (YELLOW) light
will turn off and the ON (GREEN) light will turn on. The detector is now operational and monitoring for
gas and propane fumes.
2. When the sensor detects gasoline or propane fumes above the alarm threshold levels, the alarm will sound
and the ALARM (RED) light will turn on. The alarm will continue until the air in the monitored area
returns to safe levels.
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1. With the unit on, check the sensor assembly light. The RED light should be on.
2. When the ON (GREEN) operation light is lit, the sensor assembly can be tested.
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3. SENSOR TEST: Direct the lighter towards the sensor and depress the lever to release gas (only) into the sensor.
The alarm should sound and the ALARM (RED) light on the control panel should be lit.
4.
SUPERVISORY CIRCUIT TEST 1: Disconnect one end of the 20-foot connector cable. The alarm should sound
and the ALARM (RED) light on the control panel should be lit.
5.
SUPERVISORY CIRCUIT TEST 2: Use a rocking motion to pull the sensor (Figaro TGS 813) straight out from
the sensor assembly. The alarm should sound and the ALARM (RED) light on the control panel should be lit.
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1. Keep the sensor free of dust and debris. It is recommended that the sensor—the Figaro TGS 813—(MTI Part No.
SA-186-S) be replaced annually due to the contamination caused in the marine environment. To replace, pull
sensor straight out from base.
2. Remove the sensor whenever the bilge compartment or engine compartment equipment is being cleaned, painted,
power washed etc. Direct contact with chemicals, WD-40, water, oil, etc. can cause permanent damage to the
sensor.
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No Power
Wire connections, missing or blown fuse, reversed wires, or defective unit.
Locked In Wait
Replace sensor assembly SA-186-SB.
Immediate Alarm Turned On
Cable disconnected or broken, Sensor assembly, Check sensor assembly red light.
No Audible Alarm
Return for repair or replacement.
No Alarm During Supervision Tests
Return for repair or replacement.
Red LED ON Sensor Assembly Is Off
Unit is off, Cable disconnected or broken, SA-186-SB defective.
No Alarm when Sensor is Removed
If panel tests OK, replace the sensor Figaro TGS 813.
No Alarm With Lighter Test
If the panel tests OK, replace the Figaro TGS 813 sensor. If that does
not
remedy the condition, replace the sensor
assembly SA-186-SB.
®
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To order the Figaro TGS 813 sensor, specify MTI part number SA-186-S.
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