MARINE TECHNOLOGIES SAFE-T-ALERT SA-1 User manual
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Power Supply - 12 VDC Operational Voltage - 7 to 15 VDC Power Draw -.200 amps @ 14 VDC
Operating Temp -220F - 1600F Alarm Threshold - <20% LEL of Gasoline and Propane
Other gases detected but not listed; Alcohol, Acetone, Hydrogen and most other flammable gases
Marine UL listed to Standard UL 1110
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. warrants to the original retail purchaser that its products will be free from defects of material or
workmanship for a period of One (1) year from the date of retail purchase. If proven to have been defective in original
materials or workmanship and returned, delivery costs prepaid, MTI INDUSTRIES, INC. will replace this product free of
charge.
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Replacement is your exclusive remedy under this limited warranty or any other warranty (including any implied warranty of
merchantability for a particular purpose). Any and all implied warranties or merchantability or fitness for a particular
purpose shall be limited to the warranty period from the original date of retail purchase. MTI INDUSTRIES, INC., its
dealers and distributors shall in no case be responsible or in any way liable for any incidental or consequential damages for
any reason. Some states do not allow the limitation or exclusion of incidental or consequential damages, or allow limitations
on how long an implied warranty lasts, so the above limitations may not apply to you. This warranty gives you specific
rights, and you may also have other rights, which may vary, from state to state.
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This warranty does not cover damage or failure resulting from acts of God, abuse, misuse, neglect, or
faulty installation.
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It is MTI’s experience that an alarm is sounding for a reason. Call, ask your dealer to call, or e-mail our Customer Service
Department (as listed below) to trouble shoot the situation.
Customer Service Phone No. - 800-383-0269 Fax No. 847-546-9007
E-mail Service@mtiindustries.com Web Site: www.mtiindustries.com
If Customer Service determines that the unit is defective, a Replacement Authorization (RA) number will be issued.
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©2004 MTI Industries, Inc.
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MTI FORM NO: SA1-1004 Rev-1
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Every year, boating injuries and deaths can be attributed to explosions that could have been avoided. Even fumes
from a half-cup of gasoline have the explosive force of six sticks of dynamite. With a boat’s gas-powered engine
or gas/LP gas powered appliances, vapors can easily develop in pumps, tanks, lines, or carburetors.
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SA-1 and SA-1XL system is exclusively designed, tested and listed by the
Underwriters Laboratories for use in the harsh marine environment. The unit serves as an early warning detector
to protect you and your boat from propane and gas fumes. The SA-1 and SA-1XL provide sensors to detect the
build up of explosive gases even in early stages. The sensors alarm when 20% or less of the lower explosive
limit of gasoline or propane vapors is present in a monitored area.
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. Some reasons your detector may not have power include an open circuit
breaker, a blown or missing fuse, a broken wire or improper wire crimp connection.
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The detector’s loudness is designed to meet or exceed regulatory standards; however, the
detector may not be heard if they are remotely located. Individuals who are hard-of-hearing, have consumed alcoholic
beverages, have taken prescription, non-prescription or illegal drugs may not hear the alarm. If your boat has any
sleeping areas, consider installing additional detectors in those areas.
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The sensor cannot monitor a compartment that
is separated by a bulkhead. Gasoline fumes may be present in other areas. MTI recommends that sensors be installed in
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compartments containing fuel tanks and or engine(s) and compartments where gasoline or propane fumes may
accumulate.
An 3/8” electric drill, ¼” and 7/64” drill bits, 2-1/8” hole saw, electric
jigsaw, screwdrivers (Phillips and slotted), stainless-steel pan head screws, washers bolts, nuts, locking nuts,
silicone sealant, 18-, 14-gauge wire, inline fuse holder, 1A fuse, wire stripper, crimping tool, crimp connectors,
adhesive-lined heat shrink tubing, split loom wire wrap, heat gun, wire supports, and cable ties.
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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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1
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